WO2024085302A1 - 생분해성 멜트블로운 부직포용 조성물, 및 이를 이용하여 제조된 생분해성 멜트블로운 부직포 - Google Patents
생분해성 멜트블로운 부직포용 조성물, 및 이를 이용하여 제조된 생분해성 멜트블로운 부직포 Download PDFInfo
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- WO2024085302A1 WO2024085302A1 PCT/KR2022/018639 KR2022018639W WO2024085302A1 WO 2024085302 A1 WO2024085302 A1 WO 2024085302A1 KR 2022018639 W KR2022018639 W KR 2022018639W WO 2024085302 A1 WO2024085302 A1 WO 2024085302A1
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
- D04H3/009—Condensation or reaction polymers
- D04H3/011—Polyesters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
- C08L101/16—Compositions of unspecified macromolecular compounds the macromolecular compounds being biodegradable
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/098—Melt spinning methods with simultaneous stretching
- D01D5/0985—Melt spinning methods with simultaneous stretching by means of a flowing gas (e.g. melt-blowing)
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
- D01D5/34—Core-skin structure; Spinnerette packs therefor
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
- D01F6/625—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters derived from hydroxy-carboxylic acids, e.g. lactones
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
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- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4326—Condensation or reaction polymers
- D04H1/435—Polyesters
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/56—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/016—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the fineness
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/16—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
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- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
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- D10B2401/06—Load-responsive characteristics
- D10B2401/063—Load-responsive characteristics high strength
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- D10B2505/00—Industrial
- D10B2505/04—Filters
Definitions
- the present invention relates to a composition for biodegradable meltblown nonwoven fabric and a biodegradable meltblown nonwoven fabric manufactured using the same.
- Polyhydroxyalkanoates are biodegradable polymers composed of several types of hydroxy carboxylic acids produced by numerous microorganisms and used as intracellular storage substances.
- Polyhydroxyalkanoates are polybutylene adipate terephthalate (PBAT), polybutylene succinate (PBS), and polybutylene succinate derived from conventional petroleum. It has similar physical properties to synthetic polymers such as terephthalate (PBST) and polybutylene succinate adipate (PBSA), is completely biodegradable, and has excellent biocompatibility.
- non-woven fabric is an industrial textile material used in various fields such as controlling suspended substances such as fine particles or gas in the air, or as a core material in filtration processes to control the purity of water used in industrial sites such as food processing. It is being used in.
- interest in the hazards to the human body caused by yellow dust, fine dust, and ultrafine dust has increased since the 2000s, and as interest in non-woven fabrics used as filtration materials has increased due to the new coronavirus in 2019, research on this has been actively conducted. It's going on.
- petrochemical-based polymer materials were used as materials for nonwoven fabrics.
- products using petrochemical-based polymer materials are difficult to collect or recycle after use, and have the problem of greatly polluting the environment when left in the soil or ocean.
- biodegradable polymers that can improve biodegradability are being applied, the raw materials are expensive or there are limitations in improving the filtration, breathability, and flexibility required for nonwoven fabrics.
- nonwoven fabrics are mainly manufactured by the meltblown process or spunbond process.
- Meltblown nonwoven fabrics can be manufactured using ultrafine fibers compared to spunbond nonwoven fabrics, so they have excellent flexibility and are easy to laminate with other nonwoven fabrics.
- polymers are melt-spun under high temperature and pressure conditions, uniformity in diameter, etc. of the produced fibers is low. Therefore, the development of a biodegradable nonwoven fabric that is eco-friendly due to its excellent biodegradability and biocompatibility, and has properties such as filtration, breathability, and flexibility, as well as excellent uniformity in fiber diameter, etc., manufactured even under high temperature and high pressure conditions such as a melt blown process, is needed. It is necessary.
- Patent Document 1 Korean Patent Publication No. 2012-0103158
- the present invention is a biodegradable meltble that is eco-friendly due to its excellent biodegradability and biocompatibility, and has properties such as filterability, breathability, and flexibility, as well as excellent uniformity in the diameter of the fibers manufactured even under high temperature and high pressure conditions such as the melt blown process.
- the object is to provide a composition for nonwoven fabrics and a biodegradable meltblown nonwoven fabric manufactured using the same.
- the composition for biodegradable meltblown nonwoven fabric includes a polyhydroxyalkanoate resin (PHA) containing a 4-hydroxybutyrate (4-HB) repeating unit, and is prepared according to ASTM D1238.
- PHA polyhydroxyalkanoate resin
- 4-HB 4-hydroxybutyrate
- the melt flow index (MFI) measured at 210°C and 2.16 kg is more than 30 g/10min.
- the PHA resin may include 0.1% by weight to 60% by weight of the 4-hydroxybutyrate (4-HB) repeating unit.
- the PHA resin may include a first PHA resin.
- the first PHA resin may include 15% to 60% by weight of 4-hydroxybutyrate (4-HB) repeating unit, and can be used at 165°C and 5 kg according to ASTM D1238.
- the melt flow index (MFI) measured below may be 0.1 g/10min to 20 g/10min.
- the PHA resin may include a second PHA resin.
- the second PHA resin may include 0.1% by weight or more to 30% by weight of 4-hydroxybutyrate (4-HB) repeating unit, and can be used at 165°C and 5% according to ASTM D1238.
- the melt flow index measured under kg may be 0.1 g/10min to 15 g/10min.
- the composition for biodegradable meltblown nonwoven fabric includes polybutylene adipate terephthalate (PBAT), polylactic acid (PLA), polybutylene succinate (PBS), and polybutylene adipate.
- PBA polybutylene succinate-adipate
- PBST polybutylene succinate-terephthalate
- PHBV polyhydroxybutyrate-valerate
- PCL polycaprolactone
- PBSAT succinate adipate terephthalate
- TPS thermoplastic starch
- the weight ratio of the PHA resin and the biodegradable resin may be 1:99 to 99:1.
- the weight ratio of the PHA resin and the polylactic acid (PLA) resin may be 20:80 to 70:30.
- the composition for biodegradable meltblown nonwoven fabric is a group consisting of a pigment, a pigment absorbent, a light absorber, an antioxidant, a compatibilizer, a weighting agent, a nucleating agent, a melt strength agent, a slip agent, and a fluidizing agent. It may further include one or more additives selected from.
- the PHA resin is 3-hydroxybutyrate (3-HB), 3-hydroxypropionate (3-HP), 3-hydroxyhexanoate (3-HH), Consisting of 3-hydroxyvalerate (3-HV), 4-hydroxyvalerate (4-HV), 5-hydroxyvalerate (5-HV) and 6-hydroxyhexanoate (6-HH) It may further include one or more repeating units selected from the group.
- the biodegradable meltblown nonwoven composition may have a melt flow index of 10 g/10min to 30 g/10min measured at 190°C and 2.16 kg according to ASTM D1238, and a weight of The average molecular weight may be 500,000 g/mol or less.
- the biodegradable meltblown nonwoven fabric according to another embodiment of the present invention includes biodegradable fibers, and the biodegradable fibers are polyhydroxyalkanoate (PHA) containing a 4-hydroxybutyrate (4-HB) repeating unit. ) includes a resin, the average diameter of the biodegradable fiber is 10 ⁇ m or less, and the standard deviation for the average diameter is 1.3 or less.
- PHA polyhydroxyalkanoate
- 4-HB 4-hydroxybutyrate
- the biodegradable meltblown nonwoven fabric may have a filter efficiency of 8% or more at 0.3 ⁇ m according to KS K ISO 9073-152007, and a filter efficiency of 10% or more at 0.5 ⁇ m.
- the total thickness may be 0.05 mm to 20 mm, and the basis weight may be 10 gsm to 500 gsm.
- the warp strength according to K ISO 9073-3:1989 may be 3N or more, and the warp elongation may be 6% or more.
- the biodegradable fiber may be a heterogeneous cross-section composite fiber or a bicomponent or more ternary composite fiber.
- a functional coating layer may be additionally included on at least one side of the biodegradable meltblown nonwoven fabric.
- a method for producing a biodegradable meltblown nonwoven fabric according to another embodiment of the present invention includes the step of melt-extruding a composition for a biodegradable meltblown nonwoven fabric or a pellet manufactured using the same, and then spinning the biodegradable meltblown nonwoven fabric composition.
- the composition for meltblown nonwoven fabrics includes a polyhydroxyalkanoate (PHA) resin containing a 4-hydroxybutyrate (4-HB) repeating unit, and has a melt flow measured at 210°C and 2.16 kg according to ASTM D1238.
- the Melt Flow Index (MFI) is more than 30 g/10min.
- the melt extrusion temperature may be 150°C to 230°C.
- the spinning step may be performed by adjusting the basis weight of the biodegradable meltblown nonwoven fabric to be manufactured from 10 gsm to 500 gsm.
- the step of spinning the composition for biodegradable meltblown nonwoven fabric may be performed using a sheath-core composite spinning device.
- the weight ratio of the raw materials introduced into the core portion and the sheath portion may be 5:95 to 95:5.
- the composition for biodegradable meltblown nonwoven fabric may be added to the core portion.
- the composition for biodegradable meltblown nonwoven fabric includes a polyhydroxyalkanoate resin containing a 4-hydroxybutyrate (4-HB) repeating unit, and is suitable for use at 210°C and 210°C according to ASTM D1238.
- MFI melt flow index
- biodegradable meltblown nonwoven fabric be produced directly from the composition for biodegradable meltblown nonwoven fabric, but also a biodegradable meltblown nonwoven fabric can be produced using the biodegradable pellets manufactured from the composition for biodegradable meltblown nonwoven fabric. Since non-woven fabric can be manufactured, it is easy to select and apply the process as needed.
- composition for biodegradable meltblown nonwoven fabric and the biodegradable meltblown nonwoven fabric manufactured therefrom are biodegradable in both soil and the ocean and also have excellent thermal and mechanical properties, so they can be easily applied to a wider range of fields. characteristics can be demonstrated.
- Figure 1 shows a scanning electron microscopy (SEM, 100x magnification) image of the biodegradable meltblown nonwoven fabric of Example 14.
- Figure 2 shows a scanning electron microscope (SEM, 1,000 magnification) image of the biodegradable meltblown nonwoven fabric of Example 14.
- composition for biodegradable meltblown nonwoven fabric Composition for biodegradable meltblown nonwoven fabric
- the composition for biodegradable meltblown nonwoven fabric includes a polyhydroxyalkanoate resin containing a 4-hydroxybutyrate (4-HB) repeating unit, and is suitable for use at 210°C and 210°C according to ASTM D1238.
- the melt flow index (MFI) measured under 2.16 kg is more than 30 g/10min.
- Non-woven fabric is a fiber aggregate or film that is bonded to each other using physical or chemical means rather than spinning, weaving, or braiding. It is manufactured directly into a fabric-like form using the fusing power of the fiber itself or the entanglement of the fibers. It means that it has been done.
- nonwoven fabrics were manufactured using petrochemical-based materials such as polypropylene (PP), but their biodegradability was low. Accordingly, a method of using polylactic acid (PLA) as a material for non-woven fabric was proposed, but the degree of improvement in biodegradability was not significant, and its low flexibility made it rough and stiff to the touch, resulting in poor feeling of use and wearing, making it difficult to apply to various fields.
- PLA polylactic acid
- nonwoven fabrics are mainly manufactured by the meltblown process or spunbond process.
- Meltblown nonwoven fabrics can be manufactured using ultrafine fibers compared to spunbond nonwoven fabrics, so they have excellent flexibility and are easy to laminate with other nonwoven fabrics.
- polymers are melt-spun under high temperature and pressure conditions, uniformity in diameter, etc. of the produced fibers is low.
- the composition for biodegradable meltblown nonwoven fabric includes a polyhydroxyalkanoate resin containing a 4-hydroxybutyrate (4-HB) repeating unit, and has a polyhydroxyalkanoate resin of 210 according to ASTM D1238.
- MFI melt flow index
- the melt flow index (MFI) measured at °C and 2.16 kg is controlled to over 30 g/10min, it is environmentally friendly with excellent biodegradability and biocompatibility, and has properties such as filterability, breathability, and flexibility. Uniformity, such as the diameter of the manufactured fiber, can be improved even under high temperature and high pressure conditions such as the process.
- composition for biodegradable meltblown nonwoven fabric includes a polyhydroxyalkanoate resin containing a 4-hydroxybutyrate (4-HB) repeating unit.
- the composition for biodegradable meltblown nonwoven fabric is polyhydroxyalkanoate, a copolymerized polyhydroxyalkanoate resin containing a 4-hydroxybutyrate (4-HB) repeating unit.
- PHA polyhydroxyalkanoate
- copolymerized polyhydroxyalkanoate resin containing a 4-hydroxybutyrate (4-HB) repeating unit PHA resin
- PHA resin more specifically, by including a specific first PHA resin and/or second PHA resin having a 4-HB repeating unit, it has excellent biodegradability and biocompatibility, making it environmentally friendly and biodegradable with excellent properties.
- Meltblown nonwoven fabric can be easily manufactured.
- composition for biodegradable meltblown nonwoven fabric and the biodegradable meltblown nonwoven fabric manufactured therefrom are biodegradable in both soil and the ocean and also have excellent thermal and mechanical properties, so they can be easily applied to a wider range of fields. characteristics can be demonstrated.
- the PHA is a thermoplastic natural polyester polymer that accumulates in microbial cells. Since it is a biodegradable material, PHA can be composted and can ultimately be decomposed into carbon dioxide, water, and organic waste without generating toxic waste. In particular, since PHA can be biodegraded in soil and the ocean, when the composition for biodegradable meltblown nonwoven fabric and the biodegradable meltblown nonwoven fabric using the same contain PHA resin, it can have environmentally friendly characteristics. Therefore, the composition for biodegradable meltblown nonwoven fabric and the biodegradable meltblown nonwoven fabric using the same have a great advantage in that they can be used in various fields because they have excellent biodegradability and are environmentally friendly.
- the PHA is a thermoplastic natural polyester polymer that accumulates within microbial cells. When certain bacteria are unbalanced with nutrients (nitrogen source, phosphorus, etc.), they accumulate PHA within the cells to store carbon sources and energy. It is formed by doing
- the PHA is polybutylene adipate terephthalate (PBAT), polybutylene succinate (PBS), polybutylene succinate terephthalate (PBST), and polybutylene succinate adipate (PBAT) derived from existing petroleum. It has similar physical properties to synthetic polymers such as (PBSA), is completely biodegradable, and has excellent biocompatibility.
- PBAT polybutylene adipate terephthalate
- PBS polybutylene succinate
- PBST polybutylene succinate terephthalate
- PBAT polybutylene succinate adipate
- PHA can be synthesized from more than 150 types of monomers, so hundreds of types of PHA can be manufactured depending on the type of monomer, and different types of PHA can be produced depending on the type of monomer. Hundreds of types of PHAs each have completely different structures and properties.
- the PHA resin may be composed of a single monomer repeating unit within living cells, and may be formed by polymerizing one or more monomer repeating units.
- the PHA resin may be a single polyhydroxyalkanoate resin (hereinafter referred to as HOMO PHA resin), and a copolymerized polyhydroxyalkanoate resin (hereinafter referred to as copolymer PHA resin), that is, a polymer. It may be a copolymer in which different repeating units are randomly distributed in the chain.
- repeating units that may be included in the PHA resin include 2-hydroxybutyrate, lactic acid, glycolic acid, 3-hydroxybutyrate (hereinafter referred to as 3-HB), and 3-hydroxypropionate (hereinafter referred to as 3-HB).
- 3-HP 3-hydroxyvalerate
- 3-HV 3-hydroxyhexanoate
- 3-HH 3-hydroxyheptanoate
- 3-HHep 3-hydroxyoctanoate
- 3-HO 3-hydroxynonanoate
- 3-HD 3-hyde Roxydecanoate
- 3-HDdodecanoate hereinafter referred to as 3-HDd
- 4-hydroxybutyrate hereinafter referred to as 4-HB
- 4-Hydroxyvalerate hereinafter referred to as 4-HV
- 5-HV 5-hydroxyvalerate
- the PHA resin is 3-HB, 4-HB, 3-HP, 3-HH. It may include one or more repeating units selected from the group consisting of 3-HV, 4-HV, 5-HV and 6-HH.
- the PHA resin may be a HOMO PHA resin composed only of 4-HB repeating units, or it may be a copolymer PHA resin containing 4-HB repeating units.
- the PHA resin includes a 4-HB repeating unit and additionally includes one repeating unit different from the 4-HB, or 2, 3, 4, 5, 6 or more different repeating units. It may be a copolymer PHA resin that additionally contains a repeating unit.
- the PHA resin may be poly 3-hydroxybutyrate-co-4-hydroxybutyrate (hereinafter referred to as 3HB-co-4HB).
- the PHA resin may contain isomers.
- the PHA resin may include structural isomers, enantiomers, or geometric isomers.
- the PHA resin may include structural isomers.
- the PHA resin may be a copolymer PHA resin with controlled crystallinity.
- the PHA resin may include at least one 4-HB repeating unit, and the crystallinity of the PHA resin can be adjusted by controlling the content of the 4-HB repeating unit.
- the PHA resin is 3-hydroxybutyrate (3-HB), 4-hydroxybutyrate (4-HB), 3-hydroxypropionate (3-HP), 3-hydroxyhexanoate (3-HH), 3-hydroxyvalerate (3-HV), 4-hydroxyvalerate (4-HV), 5-hydroxyvalerate (5-HV) and 6-hydroxyhexanoate ( It may be a copolymer PHA resin containing one or more repeating units selected from the group consisting of 6-HH).
- the copolymer PHA resin includes a 4-HB repeating unit, a 3-HB repeating unit, a 3-HP repeating unit, a 3-HH repeating unit, a 3-HV repeating unit, a 4-HV repeating unit, and a 5-HV repeating unit. It may further include one or more types of repeating units selected from the group consisting of repeating units and 6-HH repeating units. More specifically, the copolymer PHA resin may include a 4-HB repeating unit and a 3-HB repeating unit.
- the PHA resin may contain 0.1% to 60% by weight of the 4-HB repeating unit.
- the PHA resin is a copolymer PHA resin containing the 4-HB repeating unit and the 3-HB repeating unit, and may include the 4-HB repeating unit in an amount of 0.1% to 60% by weight.
- the PHA resin contains the 4-HB repeating unit in an amount of 0.5% to 50% by weight, 1% to 45% by weight, 5% to 45% by weight, 8% to 40% by weight, and 10% to 38% by weight. , it may be included in 15% by weight to 35% by weight or 20% by weight to 30% by weight.
- the PHA resin is a copolymer PHA resin containing a 4-HB repeating unit and a 3-HB repeating unit, and may contain 20% by weight or more of the 3-HB repeating unit.
- the PHA resin may contain more than 35% by weight, more than 40% by weight, more than 50% by weight, more than 60% by weight, more than 70% by weight, or more than 75% by weight, 99% by weight or less, 98% by weight or less, 97% by weight or less, 96% by weight or less, 95% by weight or less, 93% by weight or less, 91% by weight or less, 90% by weight or less, 80% by weight or less, 70% by weight or less, It may contain less than 60% by weight or less than 55% by weight.
- the PHA resin with controlled crystallinity may have its crystallinity and amorphousness adjusted by increasing the irregularity in the molecular structure. Specifically, it may be one by adjusting the type or ratio of monomers or the type or content of isomers.
- the PHA resin may include two or more types of PHA resins with different crystallinity. Specifically, the PHA resin may be adjusted to have the content of the 4-HB repeating unit within the specific range by mixing two or more types of PHA resins with different crystallinities.
- the PHA resin may include a first PHA resin that is an amorphous PHA resin with controlled crystallinity.
- the first PHA resin is an amorphous PHA resin with controlled crystallinity (hereinafter referred to as aPHA resin), and contains 4-HB repeating units in an amount of 15% to 60% by weight, 15% to 55% by weight, and 20% by weight. to 55% by weight, 25% to 55% by weight, 30% to 55% by weight, 35% to 55% by weight, 20% to 50% by weight, 25% to 50% by weight, 30% to 50% by weight It may be included in weight%, 35% by weight to 50% by weight, or 20% by weight to 40% by weight.
- aPHA resin amorphous PHA resin with controlled crystallinity
- the glass transition temperature (Tg) of the first PHA resin may be -45°C to -10°C, -35°C to -15°C, -35°C to -20°C, or -30°C to -20°C. Additionally, the crystallization temperature (Tc) of the first PHA resin may not be measured, or may be 60°C to 120°C, 60°C to 110°C, 70°C to 120°C, or 75°C to 115°C. The melting temperature (Tm) of the first PHA resin may not be measured, or may be 100°C to 170°C, 100°C to 160°C, 110°C to 160°C, or 120°C to 150°C.
- the glass transition temperature (Tg), crystallization temperature (Tc), and melting temperature (Tm) may be measured using differential scanning calorimetry (DSC). Specifically, the glass transition temperature (Tg), crystallization temperature (Tc), and melting temperature (Tm) are measured using a first scan (1 st scan) or a second scan (2 nd scan) in differential scanning calorimetry (DSC) mode. This can be confirmed from the heat flow curve obtained by scanning. More specifically, the glass transition temperature (Tg) and crystallization temperature (Tc) are obtained from the heat flow curve obtained by increasing the temperature from 40°C to 180°C at a rate of 10°C/min and then cooling to -50°C at a rate of 10°C/min. and melting temperature (Tm) can be confirmed.
- DSC differential scanning calorimetry
- the first PHA resin may have a melt flow index (MFI) of 0.1 g/10min to 20 g/10min measured at 165°C and 5 kg according to ASTM D1238.
- MFI melt flow index
- the first PHA resin has a melt flow index of 0.1 g/10min to 15 g/10min, 0.1 g/10min to 12 g/10min, and 0.1 g/10min measured at 165°C and 5 kg according to ASTM D1238.
- the weight average molecular weight of the first PHA resin is 10,000 g/mol to 1,200,000 g/mol, 10,000 g/mol to 1,000,000 g/mol, 50,000 g/mol to 1,000,000 g/mol, 200,000 g/mol to 1,200,000 g/mol, 250,000 g/mol to 1,000,000 g/mol, 100,000 g/mol to 900,000 g/mol, 500,000 g/mol to 900,000 g/mol, 200,000 g/mol to 800,000 g/mol, or 200,000 g/mol to 500,000 g/mol. You can.
- the PHA resin may include a second PHA resin that is a semi-crystalline PHA resin.
- the second PHA resin is a semi-crystalline PHA resin with controlled crystallinity (hereinafter referred to as scPHA resin), and may include 0.1% by weight to 30% by weight of a 4-HB repeating unit.
- the second PHA resin contains 4-HB repeating units in an amount of 0.1% to 30% by weight, 0.5% to 30% by weight, 1% to 29% by weight, 3% to 29% by weight, 1% by weight. % to 28% by weight, 1.5% to 25% by weight, 2% to 20% by weight, 2.5% to 15% by weight, 3% to 25% by weight, 5% to 21% by weight, 6% to 6% by weight. It may be included at 18% by weight, 10% by weight to 30% by weight, 10% by weight to 20% by weight, 13% by weight to 23% by weight, or 15% by weight to 20% by weight.
- the glass transition temperature (Tg) of the second PHA resin is -30°C to 80°C, -30°C to 10°C, -25°C to 5°C, -25°C to 0°C, -20°C to 0°C, or -15°C. It may be from °C to 0°C.
- the crystallization temperature (Tc) of the second PHA resin may be 70°C to 120°C, 75°C to 120°C, or 75°C to 115°C, and the melting temperature (Tm) of the second PHA resin may be 105°C to 165°C. , 110°C to 160°C, 115°C to 155°C, or 120°C to 150°C.
- the second PHA resin may have a melt flow index of 0.1 g/10min to 15 g/10min measured at 165°C and 5 kg according to ASTM D1238.
- the second PHA resin has a melt flow index of 0.1 g/10min to 10 g/10min, 0.2 g/10min to 7 g/10min, and 0.5 g/10min measured at 165°C and 5 kg according to ASTM D1238.
- the weight average molecular weight of the second PHA resin is 10,000 g/mol to 1,200,000 g/mol, 50,000 g/mol to 1,100,000 g/mol, 50,000 g/mol to 350,000 g/mol, 100,000 g/mol to 1,000,000 g/mol, 100,000 g/mol to 900,000 g/mol, 200,000 g/mol to 800,000 g/mol, 200,000 g/mol to 600,000 g/mol, 200,000 g/mol to 500,000 g/mol, or 500,000 g/mol to 1,200,000 g/mol. You can.
- the first PHA resin and the second PHA resin can be distinguished according to the content of the 4-HB repeating unit, and are characterized by the glass transition temperature (Tg), crystallization temperature (Tc), melt temperature (Tm), and melt flow index. It may have at least one characteristic selected from the group consisting of Specifically, the first PHA resin and the second PHA resin can be distinguished according to the content of 4-HB repeating units, glass transition temperature (Tg), crystallization temperature (Tg), melting temperature (Tm), melt flow index, etc. there is. For example, the content of the 4-HB repeating unit of the first PHA resin and the content of the 4-HB repeating unit of the second PHA resin may be different from each other.
- the PHA resin may include the first PHA resin or the second PHA resin, or may include both the first PHA resin and the second PHA resin.
- the PHA resin may include a first PHA resin that is an amorphous PHA resin, or include both a first PHA resin that is an amorphous PHA resin and a second PHA resin that is a semi-crystalline PHA resin, and more specifically, the first PHA resin. And by adjusting the content of the second PHA resin, the desired physical properties can be more effectively controlled.
- the PHA resin may include the first PHA resin or the second PHA resin.
- the PHA resin may be composed only of the first PHA resin or only the second PHA.
- the PHA resin may include the first PHA resin and the second PHA resin.
- the weight ratio of the first PHA resin and the second PHA resin may be 1:0.5 to 5.
- the weight ratio of the first PHA resin and the second PHA resin may be 1:0.5 to 4.5, 1:0.6 to 4.2, or 1:0.7 to 3.5.
- the glass transition temperature (Tg) of the PHA resin is -45°C to 80°C, -35°C to 80°C, -30°C to 80°C, -25°C to 75°C, -20°C to 70°C, -35°C. °C to 5°C, -25°C to 5°C, -35°C to 0°C, -25°C to 0°C, -30°C to -10°C, -35°C to -15°C, -35°C to -20°C, It may be -20°C to 0°C, -15°C to 0°C, or -15°C to -5°C.
- the crystallization temperature (Tc) of the PHA resin is not measured, or is 60°C to 120°C, 60°C to 110°C, 70°C to 120°C, 75°C to 120°C, 75°C to 115°C, 75°C to 110°C, or It may be 90°C to 110°C.
- the melting temperature (Tm) of the PHA resin is not measured or is 100°C to 170°C, 105°C to 170°C, 105°C to 165°C, 110°C to 160°C, 115°C to 155°C, 110°C to 150°C. °C, may be 120°C to 150°C or 120°C to 140°C.
- the PHA resin may have a decomposition temperature (Td, weight loss of 5%) of 220°C to 280°C, 245°C to 275°C, 255°C to 270°C, or 260°C to 270°C, as measured by thermogravimetric analysis (TGA). .
- Td decomposition temperature
- the decomposition temperature (Td) can be measured using a thermogravimetric analyzer (TGA). Specifically, the decomposition temperature (Td) is obtained when the weight of the PHA resin decreases by 5% from the weight change curve obtained by increasing the temperature from room temperature to 600°C at a rate of 10°C/min using a thermogravimetric analyzer (TGA). The temperature can be checked as the decomposition temperature (Td).
- TGA thermogravimetric analyzer
- the weight average molecular weight of the PHA resin may be 10,000 g/mol to 1,200,000 g/mol.
- the weight average molecular weight of the PHA is 50,000 g/mol to 1,200,000 g/mol, 100,000 g/mol to 1,000,000 g/mol, 200,000 g/mol to 1,200,000 g/mol, 250,000 g/mol to 1,150,000 g/mol.
- the crystallinity of the PHA resin measured by differential scanning calorimeter (DSC) may be 90% or less.
- the crystallinity of the PHA resin may be measured by differential scanning heat capacity analysis and may be 90% or less, 85% or less, 80% or less, 75% or less, or 70% or less.
- the average particle size of the PHA resin may be 0.5 ⁇ m to 5 ⁇ m.
- the average particle size of the PHA resin is 0.7 ⁇ m to 4.6 ⁇ m, 1.1 ⁇ m to 4.5 ⁇ m, 1.5 ⁇ m to 4.3 ⁇ m, 2.2 ⁇ m to 4.2 ⁇ m, 2.6 ⁇ m to 4.0 ⁇ m, 2.8 ⁇ m to 3.9 ⁇ m, or 3.1 ⁇ m It may be from 3.8 ⁇ m.
- the average particle size of the PHA resin can be measured using a nano particle size analyzer (ex. Zetasizer Nano ZS). Specifically, for the PHA, the average particle size was measured using the principle of dynamic light scattering (DLS) at a temperature of 25°C and a measurement angle of 175° using Zetasizer Nano ZS (manufacturer: Marven). At this time, the peak value derived through the polydispersity index (PDI) at a confidence interval of 0.5 was measured as the particle size.
- DLS dynamic light scattering
- PDI polydispersity index
- the polydispersity index (PDI) of the PHA resin may be less than 2.5.
- the polydispersity index of the PHA resin may be 2.4 or less, 2.3 or less, 2.1 or less, or 2.0 or less.
- the PHA resin may be obtained by cell disruption using a non-mechanical method or a chemical method.
- the PHA resin is a thermoplastic natural polyester polymer that accumulates in microbial cells and has a relatively large average particle size, so a crushing process is performed to more effectively control the yield or physical properties of the desired material and improve process efficiency. It may have been obtained through
- the composition for biodegradable meltblown nonwoven fabric includes polybutylene adipate terephthalate (PBAT), polylactic acid (PLA), polybutylene succinate (PBS), poly Butylene adipate (PBA), polybutylene succinate-adipate (PBSA), polybutylene succinate-terephthalate (PBST), polyhydroxybutyrate-valerate (PHBV), polycaprolactone (PCL) , polybutylene succinate adipate terephthalate (PBSAT), and thermoplastic starch (TPS).
- PBAT polybutylene adipate terephthalate
- PLA polylactic acid
- PBS polybutylene succinate
- PBA polybutylene adipate
- PBSA polybutylene succinate-adipate
- PBST polybutylene succinate-terephthalate
- PHBV polyhydroxybutyrate-valerate
- PCL polycaprolactone
- PBSAT polybutylene succinate adip
- the composition for biodegradable meltblown nonwoven fabric has excellent dispersibility and can further improve filter efficiency along with filtration, breathability, and flexibility required for nonwoven fabric.
- the composition for biodegradable meltblown nonwoven fabric may include 15% by weight or more of the PHA resin based on the total weight of the composition for biodegradable meltblown nonwoven fabric.
- the content of the PHA resin is 20% by weight or more, 30% by weight or more, 35% by weight or more, 40% by weight or more, 50% by weight or more, 65% by weight or more, based on the total weight of the composition for biodegradable meltblown nonwoven fabric. It may contain more than % by weight, more than 70% by weight, more than 85% by weight, more than 90% by weight, or it may be 100% by weight.
- the composition for biodegradable meltblown nonwoven fabric may contain less than 90% by weight of the biodegradable resin based on the total weight of the composition for biodegradable meltblown nonwoven fabric.
- the content of the biodegradable resin may be 85% by weight or less, 80% by weight or less, 70% by weight or less, 60% by weight, 45% by weight or less, or 35% by weight or less.
- the content of the biodegradable resin may be 35% by weight to 80% by weight, but is not limited thereto.
- the weight ratio of the PHA and the biodegradable resin may be 1:99 to 99:1.
- the weight ratio of the PHA resin and the biodegradable resin is 5:95 to 99:5, 10:90 to 90:10, 15:90 to 60:40, 5:95 to 45:55, 10:90. It may be from 40:60, 15:85 to 35:65, or 20:80 to 30:70.
- the weight ratio of PHA and biodegradable resin satisfies the above range, biodegradability and processability are not reduced, while properties such as filterability, breathability, and flexibility are maintained, as well as the diameter of the fiber manufactured even under high temperature and high pressure conditions such as the melt blown process. Uniformity can be improved.
- the biodegradable resin may be polylactic acid (PLA). More specifically, the weight ratio of the PHA resin and the PLA resin may be 10:90 to 70:30. For example, the weight ratio of the PHA resin and the PLA resin may be 10:90 to 45:55, 15:85 to 40:60, 15:85 to 35:65, or 20:80 to 30:70. As the weight ratio of PHA resin and PLA resin satisfies the above range, biodegradability and processability are not reduced, while properties such as filtration, breathability, and flexibility are maintained, as well as the diameter of fibers manufactured even under high temperature and high pressure conditions such as the melt blown process. Uniformity can be further improved.
- PLA polylactic acid
- the composition for biodegradable meltblown nonwoven fabric contains pigments, color absorbers, light absorbers, antioxidants, compatibilizers, weighting agents, nucleating agents, melt strength enhancers, slip agents, and fluidizing agents. It may further include one or more additives selected from the group consisting of
- the pigment may include one or more selected from the group consisting of inorganic particles, carbon black, and cobalt green.
- the inorganic particles may be metals such as Cu, metal oxides, metalloid oxides, or combinations thereof, but are not limited thereto.
- the pigment is 0.01% by weight to 20% by weight, 0.01% by weight to 15% by weight, 0.01% by weight to 12% by weight, 0.01% by weight to 10% by weight, 0.01% by weight, based on the total weight of the composition for biodegradable meltblown nonwoven fabric. It may be further included in weight% to 8% by weight, 0.01% to 5% by weight, 0.2% to 4.5% by weight, 0.2% to 4% by weight, or 0.5% to 3% by weight.
- the antioxidant is an additive to prevent decomposition by ozone or oxygen, prevent oxidation during storage, and prevent deterioration of physical properties, and commonly used antioxidants can be used as long as they do not impair the effect of the present invention.
- the antioxidant may include one or more selected from the group consisting of hindered phenol-based antioxidants and phosphite-based (phosphorus-based) antioxidants.
- the hindered phenolic antioxidant is, for example, 4,4'-methylene-bis(2,6-di-t-butylphenol), octadecyl-3-(3,5-di-t-butyl-4) -Hydroxyphenyl)propionate, pentaerythritol tetrakis[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate), 3,9-bis[2-[3- (3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy]-1,1-dimethylethyl]-2,4,8,10-tetraoxaspiro[5.5]undecane. It may include one or more types.
- the phosphite-based (phosphorus-based) antioxidant is, for example, tris-(2,4-di-t-butylphenyl)phosphite, bis-(2,4-di-t-butylphenyl)pentaerythritol-dipho Spite, bis-(2,6-di-t-butyl-4-methylphenyl)pentaerythritol-diphosphite, distearyl-pentaerythritol-diphosphite, [bis(2,4-di-t-butyl- 5-methylphenoxy)phosphino]biphenyl, and N,N-bis[2-[[2,4,8,10-tetrakis(1,1-dimethylethyl)dibenzo[d,f][1 ,3,2]deoxyphosphepin-6-yl]oxy]-ethyl]ethanamine.
- the antioxidant is present in an amount of 0.01 wt% to 20 wt%, 0.01 wt% to 15 wt%, 0.01 wt% to 12 wt%, 0.01 wt% to 10 wt%, based on the total weight of the composition for biodegradable meltblown nonwoven fabric. It may be further included in an amount of 0.01% to 8% by weight, 0.01% to 5% by weight, 0.2% to 4.5% by weight, 0.2% to 4% by weight, or 0.5% to 3% by weight. When the antioxidant satisfies the above content range, the physical properties of the nonwoven fabric can be improved and it can be more advantageous to achieve the desired effect in the present invention.
- the compatibilizer is an additive to provide compatibility by removing the release property of the biodegradable resin and/or the PHA resin, and commonly used compatibilizers can be used as long as they do not impair the effect of the present invention. there is.
- the compatibilizers are polyvinyl acetate (PVAc)-based, isocyanate-based, polypropylene carbonate-based, glycidyl methacrylate, ethylene vinyl alcohol, polyvinyl alcohol (PVA), ethylene vinyl acetate, maleic anhydride, and glycerin. It may include one or more types selected from the group consisting of stearates.
- the compatibilizer is present in an amount of 0.01 wt% to 20 wt%, 0.01 wt% to 15 wt%, 0.01 wt% to 12 wt%, 0.01 wt% to 10 wt%, based on the total weight of the biodegradable meltblown nonwoven composition. It may be further included in an amount of 0.01% to 8% by weight, 0.01% to 5% by weight, 0.2% to 4.5% by weight, 0.2% to 4% by weight, or 0.5% to 3% by weight.
- the compatibilizer satisfies the above content range, physical properties can be improved by increasing compatibility between the resins used, and it can be more advantageous to achieve the desired effect in the present invention.
- the weighting agent is an inorganic material and is an additive added to increase moldability by speeding up the crystallization rate during the molding process and to reduce the problem of cost increase due to the use of resins with high biodegradability characteristics compared to synthetic resins. Commonly used minerals can be used as long as they do not impair the effect.
- the weighting agent is selected from the group consisting of minerals such as zinc, calcium, stearic acid, light or heavy calcium carbonate, silica, talc, kaolin, barium sulfate, clay, calcium oxide, magnesium hydroxide, titanium oxide, carbon black, and glass fiber. It may include one or more types.
- the average particle size of the weighting agent may be 0.5 ⁇ m to 5 ⁇ m.
- the average particle size of the weighting agent may be 0.5 ⁇ m to 4.8 ⁇ m, 0.5 ⁇ m to 4.5 ⁇ m, or 0.7 ⁇ m to 4 ⁇ m. If the average particle size of the weighting agent is less than 0.5 ⁇ m, dispersion of the particles becomes difficult, and if it exceeds 5 ⁇ m, the particle size becomes too large, which may hinder the effect of the present invention.
- the weighting agent is present in an amount of 0.01% to 20% by weight, 0.01% to 15% by weight, 0.01% to 12% by weight, 0.01% to 10% by weight, based on the total weight of the composition for biodegradable meltblown nonwoven fabric. It may be further included in an amount of 0.01% to 8% by weight, 0.01% to 5% by weight, 0.2% to 4.5% by weight, 0.2% to 4% by weight, or 0.5% to 3% by weight. When the weighting agent satisfies the above content range, it can be more advantageous to achieve the desired effect in the present invention.
- the nucleating agent is an additive that assists or changes the crystallization form of the polymer and improves the crystallization (solidification) rate when the melt of the polymer is cooled.
- the PHA resin used in the present invention has a low crystallization rate, the process may not be easy because sufficient crystallization does not occur during the process.
- the crystallization rate can be improved to further improve processing, formability, and productivity, and the physical properties desired in the present invention can be efficiently achieved.
- the nucleating agent may be a commonly used nucleating agent as long as it does not impede the effect of the present invention.
- the nucleating agent is, for example, a metal compound containing a simple element (pure substance) or a complex oxide, a low molecular weight organic compound with a metal carboxylate group, a polymer organic compound with a metal carboxylate group, a polymer organic compound, phosphoric acid, or phosphorous acid. It may include or its metal salt, sorbitol derivative, thioglycolic anhydride, and p-toluenesulfonic acid or its metal salt.
- the nucleating agents may be used alone or in combination with each other.
- Metal compounds containing the single element substance (pure substance) or complex oxide include, for example, carbon black, calcium carbonate, synthetic silicic acid and its salts, silica, zinc white, clay, kaolin, basic magnesium carbonate, mica, Talc, quartz powder, diatomite, dolomite powder, titanium oxide, zinc oxide, antimony oxide, barium sulfate, calcium sulfate, alumina, calcium silicate, and metal salts of organic phosphorus and boron nitride. There may be more than one type.
- the low molecular weight organic compounds having the metal carboxylate group include, for example, octylic acid, toluic acid, heptanoic acid, pelargonic acid, lauric acid, myristic acid, palmitic acid, and stearic acid. , behenic acid, cerotic acid, montanic acid, melissic acid, benzene acid, p-tert-butylbenzene acid, terephthalic acid, terephthalic acid monomethyl ester, isophthalic acid, and metal salts of isophthalic acid monomethyl ester.
- the polymer organic compound having the metal carboxylate group is, for example, carboxyl group-containing polyethylene obtained by the oxidation reaction of polyethylene, carboxyl group-containing polypropylene obtained by the oxidation reaction of polypropylene, acrylic acid or methacrylic acid, and olefin.
- carboxyl group-containing polyethylene obtained by the oxidation reaction of polyethylene
- carboxyl group-containing polypropylene obtained by the oxidation reaction of polypropylene
- acrylic acid or methacrylic acid and olefin.
- olefin e.g., ethylene, propylene and butene-1
- copolymers of acrylic acid or methacrylic acid and styrene copolymers of olefins and maleic anhydride
- copolymers of styrene and maleic anhydride There may be one or more selected types.
- the polymer organic compound is, for example, an alpha-olefin (e.g., 3,3 dimethylbutene-1,3-methylbutene-1,3-methylpentene-) that is branched to the carbon atom in the third position and has 5 or more carbon atoms.
- alpha-olefin e.g., 3,3 dimethylbutene-1,3-methylbutene-1,3-methylpentene-
- 1,3-methylhexene-1 and 3,5,5-trimethylhexene-1 polymers of vinylcycloalkanes (e.g. vinylcyclopentane, vinylcyclohexane and vinylnorbonane), polyalkylene glycols (e.g. polyethylene) It may be one or more selected from the group consisting of glycol and polypropylene glycol), poly(glycolic acid), cellulose, cellulose ester, and cellulose ether.
- the phosphoric acid or phosphorous acid and its metal salt include, for example, diphenyl phosphate, diphenyl phosphite, metal salt of bis(4-tert-butylphenyl)phosphate, and methylene bis-(2,4-tert-butyl). It may be one or more types selected from the group consisting of phenyl) phosphate.
- the sorbitol derivative may be, for example, bis(p-methylbenzylidene) sorbitol and bis(p-ethylbenzylidene) sorbitol.
- the nucleating agent is present in an amount of 0.01 wt% to 20 wt%, 0.01 wt% to 15 wt%, 0.01 wt% to 12 wt%, 0.01 wt% to 10 wt%, based on the total weight of the composition for biodegradable meltblown nonwoven fabric. It may be further included in an amount of 0.01% to 8% by weight, 0.01% to 5% by weight, 0.2% to 4.5% by weight, 0.2% to 4% by weight, or 0.5% to 3% by weight.
- the crystallization rate can be improved to improve formability, and in the manufacturing process, for example, during the cutting process for pellet production, the crystallization rate can be improved to further improve productivity and processability. You can.
- the melt strength enhancer is an additive for improving reactive melt strength, and a commonly used melt strength enhancer can be used as long as it does not impair the effect of the present invention.
- melt strength enhancer is polyester, styrene-based polymers (e.g., acrylonitrile butadiene styrene and polystyrene), polysiloxane, organic modified siloxane polymer, polyester, and maleic anhydride grafted ethylene propylene diene monomer (MAH- It may include one or more types selected from the group consisting of g-EPDM).
- the melt strength enhancer is present in an amount of 0.01 wt% to 20 wt%, 0.01 wt% to 15 wt%, 0.01 wt% to 12 wt%, and 0.01 wt% to 10 wt% based on the total weight of the composition for biodegradable meltblown nonwoven fabric. , 0.01 wt% to 8 wt%, 0.01 wt% to 5 wt%, 0.2 to 4.5 wt%, 0.2 wt% to 4 wt%, or 0.5 wt% to 3 wt%.
- the melt strength enhancer satisfies the above content range, it can be more advantageous to achieve the desired effect in the present invention.
- the slip agent is an additive that improves slipperiness during extrusion and prevents the fiber surfaces from sticking to each other.
- the slip agent may be a commonly used slip agent as long as it does not impede the effect of the present invention.
- the slip agent may be one or more selected from the group consisting of Erucamide, Oliamide, and Stearamide.
- the slip agent is present in an amount of 0.01% to 20% by weight, 0.01% to 15% by weight, 0.01% to 12% by weight, 0.01% to 10% by weight, based on the total weight of the composition for biodegradable meltblown nonwoven fabric. It may be further included in an amount of 0.01% to 8% by weight, 0.01% to 5% by weight, 0.2% to 4.5% by weight, 0.2% to 4% by weight, or 0.5% to 3% by weight.
- processability, productivity, and moldability can be further improved, and it can be more advantageous to achieve the desired effect in the present invention.
- the composition for biodegradable meltblown nonwoven fabric may also include a crosslinking agent and/or a stabilizer.
- the cross-linking agent is an additive for modifying the properties of the PHA resin and increasing the molecular weight of the resin, and a commonly used cross-linking agent can be used as long as it does not impair the effect of the present invention.
- the crosslinking agent may be fatty acid ester, natural oil containing an epoxy group (epoxidized), diallyl phthalate, pentaerythritol tetraacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, dipentaerythate.
- At least one selected from the group consisting of litol pentaacrylate, diethylene glycol dimethacrylate, and bis(2-methacryloxyethyl)phosphate can be used.
- the crosslinking agent is present in an amount of 0.01% to 20% by weight, 0.01% to 15% by weight, 0.01% to 12% by weight, 0.01% to 10% by weight, 0.01% by weight, based on the total weight of the composition for biodegradable meltblown nonwoven fabric. It may be further included in weight% to 8% by weight, 0.01% to 5% by weight, 0.2% to 4.5% by weight, 0.2% to 4% by weight, or 0.5% to 3% by weight.
- the stabilizer may be one or more selected from the group consisting of trimethyl phosphate, triphenyl phosphate, trimethyl phosphine, phosphoric acid, and phosphorous acid.
- the stabilizer is present in an amount of 0.01% to 20% by weight, 0.01% to 15% by weight, 0.01% to 12% by weight, 0.01% to 10% by weight, based on the total weight of the composition for biodegradable meltblown nonwoven fabric. It may be further included in an amount of 0.01% to 8% by weight, 0.01% to 5% by weight, 0.2% to 4.5% by weight, 0.2% to 4% by weight, or 0.5% to 3% by weight.
- the additives may be in the form of monomers, polymers, or copolymers, but are not limited thereto.
- the composition for biodegradable meltblown nonwoven fabric may further include biomass.
- the biodegradable meltblown nonwoven composition can not only improve biodegradability but also play a role in soil improvement.
- the biomass has excellent biodegradability, is easy to crush when not decomposed, and has soil improvement effects such as improving fertilizer and increasing soil strength.
- the biomass may be included in an amount of 5 to 50% by weight, based on the total weight of the composition for biodegradable meltblown nonwoven fabric.
- the content of the biomass is 10% by weight to 48% by weight, 15% by weight to 48% by weight, 20% by weight to 45% by weight, and 20% by weight based on the total weight of the composition for biodegradable meltblown nonwoven fabric. It may be from 43% by weight or from 20% to 40% by weight.
- the biodegradable meltblown nonwoven composition may have a melt flow index of 10 g/10min to 30 g/10min measured at 190°C and 2.16 kg according to ASTM D1238.
- the biodegradable meltblown nonwoven composition has a melt flow index of 10 g/10min to 25 g/10min, 11 g/10min to 20 g/10min, or It may be 12 g/10min to 18 g/10min.
- the biodegradable meltblown nonwoven composition may have a melt flow index of 30 g/10min or more measured at 210°C and 2.16 kg according to ASTM D1238.
- the biodegradable meltblown nonwoven composition has a melt flow index of 45 g/10min or more, 50 g/10min or more, 53 g/10min or more, and 55 g measured at 210°C and 2.16 kg according to ASTM D1238.
- the melt flow index measured according to ASTM D1238 for the biodegradable meltblown nonwoven composition may be measured according to ASTM D1238 for pellets manufactured using the biodegradable meltblown nonwoven composition.
- the melt flow index may be measured according to ASTM D1238 for biodegradable pellets produced by putting the biodegradable meltblown nonwoven composition into a twin screw extruder, mixing, and melt extruding. More specifically, the biodegradable pellets were prepared by setting the screw rotation speed of the twin screw extruder to 200 rpm, mixing the composition for biodegradable meltblown nonwoven fabric while raising the internal temperature from 50°C to 170°C, and then extruding at 12 bar. It may be manufactured by melt extrusion at a pressure and a temperature of 177°C and using an underwater cutter system.
- the weight average molecular weight of the biodegradable meltblown nonwoven composition may be 500,000 g/mol or less.
- the weight average molecular weight of the biodegradable meltblown nonwoven composition may be 450,000 g/mol or less, 400,000 g/mol or less, or 350,000 g/mol or less.
- the weight average molecular weight of the biodegradable meltblown nonwoven composition may be 500,000 g/mol or less.
- the weight average molecular weight of the biodegradable meltblown nonwoven composition may be 450,000 g/mol or less, 400,000 g/mol or less, or 350,000 g/mol or less.
- the biodegradable meltblown nonwoven composition has a glass transition temperature (Tg) measured by differential scanning calorimetry (DSC) of -35°C to 15°C, -25°C to 5°C, -20°C to 1°C, -20°C. It may be -5°C to -20°C to -10°C, and the melting temperature (Tm) is 105°C to 200°C, 106°C to 195°C, 110°C to 180°C, 130°C to 180°C, 150°C to 180°C. °C, or 170°C to 180°C, and the crystallization temperature (Tc) may not be measured, or it may be 50°C to 120°C, 65°C to 100°C, or 75°C to 95°C.
- Tg glass transition temperature measured by differential scanning calorimetry
- the biodegradable meltblown nonwoven composition has a decomposition temperature (Td, 5% weight loss) measured by thermogravimetric analysis (TGA) of 220°C or higher, 230°C or higher, 240°C or higher, 250°C or higher, or 260°C or higher. It may be °C or higher, and may be 220°C to 300°C, 240°C to 300°C, 250°C to 300°C, or 260°C to 300°C.
- Td decomposition temperature measured by thermogravimetric analysis
- the biodegradable meltblown nonwoven fabric according to another embodiment of the present invention includes biodegradable fibers, and the biodegradable fibers are polyhydroxyalkanoate (PHA) containing a 4-hydroxybutyrate (4-HB) repeating unit. ) includes a resin, the average diameter of the biodegradable fiber is 10 ⁇ m or less, and the standard deviation for the average diameter is 1.3 or less.
- PHA polyhydroxyalkanoate
- 4-HB 4-hydroxybutyrate
- the biodegradable meltblown nonwoven fabric can be manufactured using the composition for biodegradable meltblown nonwoven fabric, and the description of the PHA resin is as described above.
- the biodegradable meltblown nonwoven fabric may have a filter efficiency of 8% or more at 0.3 ⁇ m and a filter efficiency of 10% or more at 0.5 ⁇ m according to KS K ISO 9073-152007.
- the biodegradable meltblown nonwoven fabric has a filter efficiency of 8% or more, 9% or more, 10% or more, 12% or more, 14% or more, 18% at 0.3 ⁇ m according to KS K ISO 9073-152007. It may be more than 20%, more than 24%, more than 30%, more than 36%, more than 45%, more than 50%, or more than 57%.
- the biodegradable meltblown nonwoven fabric has a filter efficiency of 10% or more, 11% or more, 20% or more, 26% or more, 30% or more, 32% or more at 0.5 ⁇ m according to KS K ISO 9073-152007, It may be 36% or more, 38% or more, 41% or more, 44% or more, 45% or more, 50% or more, 55% or more, 60% or more, 65% or more, or 70% or more.
- the total thickness of the biodegradable meltblown nonwoven fabric may be 0.05 mm to 20 mm.
- the total thickness of the biodegradable meltblown nonwoven fabric may be 0.06 mm to 20 mm, 0.08 mm to 15 mm, 0.1 mm to 10 mm, or 0.1 mm to 8 mm.
- the basis weight of the biodegradable meltblown nonwoven fabric may be 10 gsm to 500 gsm.
- the basis weight of the biodegradable meltblown nonwoven fabric may be 12 gsm to 450 gsm, 15 gsm to 400 gsm, 20 gsm to 350 gsm, 20 gsm to 250 gsm, or 25 gsm to 200 gsm.
- the warp strength according to K ISO 9073-3:1989 may be 30 N or more, and the warp elongation may be 10% or more.
- the warp strength according to K ISO 9073-3:1989 may be 33 N or more, 35 N or more, or 36 N or more, , the slope elongation may be 11% or more, 13% or more, 15% or more, 18% or more, or 20% or more.
- the warp strength according to K ISO 9073-3:1989 may be 20 N or more, and the warp elongation may be 4% or more.
- the warp strength according to K ISO 9073-3:1989 may be 21 N or more, 23 N or more, or 25 N or more, , the slope elongation may be 4.5% or more, 6% or more, 7% or more, or 8% or more.
- the warp strength according to K ISO 9073-3:1989 may be 3 N or more, and the warp elongation may be 6% or more.
- the warp strength according to K ISO 9073-3:1989 is 3.5 N or more, 5 N or more, 6 N or more, 7 It may be N or more, 8 N or more, or 9 N or more, and the warp elongation may be 6.5% or more, 7% or more, 8% or more, or 9% or more.
- biodegradable meltblown nonwoven fabric may be an aggregate of biodegradable fibers.
- the average diameter of the biodegradable fiber may be 10 ⁇ m or less, and the standard deviation for the average diameter may be 1.3 or less.
- the average diameter of the biodegradable fiber is 8 ⁇ m or less, 6 ⁇ m or less, 5 ⁇ m or less, 4.5 ⁇ m or less, 4 ⁇ m or less, 3.5 ⁇ m or less, 2.5 ⁇ m or less, 2.3 ⁇ m or less, 2.2 ⁇ m or less, 2 ⁇ m or less.
- it may be 1.9 ⁇ m or less or 1.7 ⁇ m or less
- the standard deviation for the average diameter may be 1.2 or less, 1.1 or less, 1 or less, 0.85 or less, or 0.6 or less.
- the biodegradable fiber may have an elongation of 500% or less, 350% or less, 200% or less, 130% or less, 100% or less, 90% or less, 80% or less, or 75% or less.
- the biodegradable fiber may be a heterogeneous cross-section composite fiber or a bicomponent or more ternary composite fiber.
- the cross-sectional shape of the irregular cross-section composite fiber may be circular, oval, or polygonal, but is not limited thereto.
- the biodegradable fiber is a sheath-core type, side by side type, sea-islands type, or segmented type including a core portion and a sheath portion. It may be a pie type).
- the sheath-core type may have cross-sections of the core portion and the sheath portion that are different from each other.
- the core portion may have a circular cross section
- the sheath portion may have a donut shape, but are not limited thereto.
- the biodegradable fiber may be a two-component composite fiber in which the sheath portion and the core portion each contain a different single-component resin, and the sheath portion contains a single-component resin, and the core portion contains a two-component composite fiber. It may be a three-component or more composite fiber containing more than one component of resin, or a three-component or more composite fiber containing a single component resin in the core portion and a two-component resin in the sheath portion. Additionally, the biodegradable fiber may be a composite fiber containing two or more resins in the sheath portion and the core portion, respectively.
- the core portion may include the PHA resin
- the sheath portion may include a biodegradable resin
- the biodegradable resin is polybutylene adipate terephthalate (PBAT), polylactic acid (PLA), polybutylene succinate (PBS), polybutylene adipate (PBA), polybutylene succinate- Adipate (PBSA), polybutylene succinate-terephthalate (PBST), polyhydroxybutylate-valerate (PHBV), polycaprolactone (PCL), polybutylene succinate adipate terephthalate (PBSAT), It may be one or more selected from the group consisting of polybutylene ethylene adipate succinate (PBEAS), polybutylene ethylene succinate (PBES), and thermoplastic starch (TPS).
- PBEAS polybutylene ethylene adipate succinate
- PBES polybutylene ethylene succinate
- TPS thermoplastic starch
- the weight ratio of the core portion and the sheath portion may be 5:95 to 95:5.
- the weight ratio of the core portion and the sheath portion may be 5:95 to 85:15, 7:93 to 80:20, 10:90 to 75:25, or 10:90 to 70:30.
- the biodegradable meltblown nonwoven fabric may be electrostatically treated.
- Electrostatic treatment is a method of improving the collection ability by applying electrostatic charge to the nonwoven fabric.
- the fibers that make up the nonwoven fabric are forced to have an electric charge inside and are made of fibers with a polarized charge accordingly.
- Non-woven fabrics can easily collect charged fine particles.
- the electrostatic treatment process may be performed using corona discharge, plasma charging, friction charging, or water charging using high-pressure water droplets, but is not limited thereto.
- an additional charging agent may be used, and the charging agent may be a hindered amine-based charging agent, but is not limited thereto.
- a functional coating layer may be additionally included on at least one surface of the biodegradable meltblown nonwoven fabric.
- the functional coating layer may be a hard coating layer or an antibacterial coating layer, and there may be an adhesive layer between the functional coating layer and the biodegradable meltblown nonwoven fabric.
- the biodegradable meltblown nonwoven fabric may have at least one surface treated using ions or electricity.
- the surface treatment may be performed by ion coating, ion collecting, electrical coating, or voltage coating, but is not limited thereto.
- a biodegradable spunbond nonwoven fabric may be additionally included on at least one side of the biodegradable meltblown nonwoven fabric.
- biodegradable meltblown nonwoven fabric may further include one or more additives selected from the group consisting of deodorants, antibacterial agents, inorganic fillers, and lubricants.
- the deodorant is, for example, titanium dioxide (TiO 2 ), zinc oxide (ZnO), tin oxide (SnO 2 ), zirconium dioxide (ZrO), and strontium titanate (SrTiO 3 ). At least one metal oxide selected from the group consisting of It may be, but is not limited to this.
- the deodorant may be included in an amount of 0.01% by weight to 20% by weight based on the total weight of the biodegradable meltblown nonwoven fabric.
- the deodorant may be included in an amount of 0.01% by weight to 20% by weight, 0.05% by weight to 15% by weight, or 0.1% by weight to 10% by weight based on the total weight of the biodegradable meltblown nonwoven fabric.
- the antibacterial agent may be one or more selected from the group consisting of nano-silver, nano-copper, nano-zinc, and zeolite-based antibacterial agents, but is not limited thereto.
- the antibacterial agent may be included in an amount of 0.01% by weight to 20% by weight based on the total weight of the biodegradable meltblown nonwoven fabric.
- the antibacterial agent may be included in an amount of 0.01% by weight to 20% by weight, 0.05% by weight to 15% by weight, or 0.1% by weight to 10% by weight based on the total weight of the biodegradable meltblown nonwoven fabric.
- the inorganic filler may be one or more selected from the group consisting of talc, barium oxide, calcium carbonate, magnesium carbonate, zinc carbonate, zinc oxide, magnesium oxide, alumina, and silica, but is not limited thereto.
- the average particle diameter of the inorganic filler may be 0.01 ⁇ m to 2.0 ⁇ m.
- the average particle diameter of the inorganic filler may be 0.01 ⁇ m to 2.0 ⁇ m, 0.05 ⁇ m to 2.0 ⁇ m, or 0.05 ⁇ m to 1.5 ⁇ m.
- the inorganic filler may be included in an amount of 0.01% by weight to 20% by weight based on the total weight of the biodegradable meltblown nonwoven fabric.
- the inorganic filler may be included in an amount of 0.01 wt% to 20 wt%, 0.05 wt% to 15 wt%, or 0.1 wt% to 10 wt% based on the total weight of the biodegradable meltblown nonwoven fabric.
- the lubricant may be a fatty acid ester, specifically glycerin fatty acid ester, sorbitan fatty acid ester, pyridoxine fatty acid ester, or a mixture of at least one or more selected from these, but is not limited thereto.
- the lubricant may be included in an amount of 0.01% by weight to 20% by weight based on the total weight of the biodegradable meltblown nonwoven fabric.
- the lubricant may be included in an amount of 0.01% by weight to 20% by weight, 0.05% by weight to 15% by weight, or 0.1% by weight to 10% by weight based on the total weight of the biodegradable meltblown nonwoven fabric.
- a method for producing a biodegradable meltblown nonwoven fabric according to another embodiment of the present invention includes the step of melt-extruding a composition for a biodegradable meltblown nonwoven fabric or a pellet manufactured using the same, and then spinning the biodegradable meltblown nonwoven fabric composition.
- the composition for meltblown nonwoven fabrics includes a polyhydroxyalkanoate (PHA) resin containing a 4-hydroxybutyrate (4-HB) repeating unit, and has a melt flow measured at 210°C and 2.16 kg according to ASTM D1238.
- the Melt Flow Index (MFI) is more than 30 g/10min.
- composition for biodegradable meltblown nonwoven fabric is the same as described above.
- the method for producing a biodegradable meltblown nonwoven fabric involves directly adding the composition for biodegradable meltblown nonwoven fabric to a machine, melting and extruding it, and then spinning it, or spinning the composition for biodegradable meltblown nonwoven fabric.
- Pellets produced by melt-extruding a non-woven fabric composition can be put into a machine and spun to produce a biodegradable melt-blown non-woven fabric.
- a biodegradable meltblown nonwoven fabric can be manufactured by melt extruding and melt spinning the composition for biodegradable meltblown nonwoven fabric at 150°C to 230°C.
- the melt extrusion and melt spinning temperatures may be 160°C to 225°C, 180°C to 220°C, or 195°C to 215°C.
- any conventional melt-blown melt-spinning device can be used without limitation.
- it can be performed using a melt-blown melt-spinning device based on a single-screw extruder, but is not limited to this.
- the meltblown melt spinning device may include a melting section, a nozzle section including a filter, a draft section between the nozzle hole and the winding roller, and a winding section.
- temperature, winding speed, etc. biodegradable meltblown nonwoven fabric with desired physical properties can be manufactured.
- the spinning step may be performed by adjusting the basis weight of the biodegradable meltblown nonwoven fabric to be manufactured from 10 gsm to 500 gsm.
- the basis weight of the produced biodegradable meltblown nonwoven fabric is 12 gsm to 450 gsm, 15 gsm to 400 gsm, 20 gsm to 350 gsm, 20 gsm to 250 gsm, and 25 gsm. It can be performed by adjusting from 200 gsm, 25 gsm to 150 gsm, 25 gsm to 100 gsm, or 25 gsm to 50 gsm.
- pellets prepared by melt-extruding the biodegradable meltblown nonwoven composition at a pressure of 6 bar to 30 bar and a temperature of 150°C to 200°C are melted at 150°C to 230°C.
- Biodegradable meltblown nonwoven fabric can be produced by spinning.
- the composition for biodegradable meltblown nonwoven fabric is melt-extruded at a pressure of 7 bar to 28 bar or 8 bar to 26 bar and 155°C to 190°C or 165°C to 185°C, and 15°C or less, After cooling to 10°C or lower or 6°C or lower, cutting it to produce pellets, the pellets are melt-spun at 160°C to 225°C, 180°C to 220°C, or 195°C to 215°C to produce biodegradable meltblown.
- Nonwoven fabrics can be manufactured.
- a step of drying the pellets at 40°C to 58°C or 42°C to 60°C for 11 hours or more or 12 hours or more may be additionally performed.
- the drying step is performed until the resin moisture content of the pellets is 2,000 ppm or less, 1,500 ppm or less, 1,100 ppm or less, 500 ppm or less, 300 ppm or less, 150 ppm or less, 100 ppm or less, 60 ppm or less, or 50 ppm or less. It can be done by hot air drying or dehumidifying drying, but is not limited to this.
- the step of spinning the composition for biodegradable meltblown nonwoven fabric may be performed using a composite spinning device.
- the composite spinning device may be a sheath-core composite spinning device.
- a biodegradable meltblown nonwoven fabric can be manufactured by directly adding the composition for biodegradable meltblown nonwoven fabric to the core portion or sheath portion of the sheath-core composite spinning device.
- the biodegradable meltblown nonwoven composition may be added to the core portion or sheath portion, and may include polybutylene adipate terephthalate (PBAT), polylactic acid (PLA), polybutylene succinate (PBS), Polybutylene adipate (PBA), polybutylene succinate-adipate (PBSA), polybutylene succinate-terephthalate (PBST), polyhydroxybutyrate-valerate (PHBV), polycaprolactone (PCL) ), polybutylene succinate adipate terephthalate (PBSAT), polybutylene ethylene adipate succinate (PBEAS), polybutylene ethylene succinate (PBES), and thermoplastic starch (TPS).
- PBAT polybutylene adipate terephthalate
- PLA polylactic acid
- PBS polybutylene succinate
- PBA Polybutylene adipate
- PBSA polybutylene succinate-adipate
- PBST polybutylene succinate
- the composition for biodegradable meltblown nonwoven fabric may be added to the core portion, and polybutylene adipate terephthalate (PBAT), polylactic acid (PLA), polybutylene succinate (PBS), and polybutylene Adipate (PBA), polybutylene succinate-adipate (PBSA), polybutylene succinate-terephthalate (PBST), polyhydroxybutyrate-valerate (PHBV), polycaprolactone (PCL), poly Containing at least one selected from the group consisting of butylene succinate adipate terephthalate (PBSAT), polybutylene ethylene adipate succinate (PBEAS), polybutylene ethylene succinate (PBES), and thermoplastic starch (TPS).
- Biodegradable resin may be introduced into the sheath portion.
- the weight ratio of the raw materials introduced into the core portion and the sheath portion is 5:95 to 95:5, 5:95 to 85:15, 7:93 to 80:20, 10:90 to 75:25 or 10: It may be 90 to 70:30.
- First PHA resin (aPHA, 4-hydroxybutyrate (4-HB) content: 33% by weight, weight average molecular weight (Mw): 600,000 g/mol, melt flow index at 165°C and 5 kg according to ASTM D1238 : 30% by weight of polyhydroxyalkanoate (PHA) resin (3-HB-co-4-HB, manufacturer: CJ) consisting of 5.5 g/10min) and 70% by weight of polylactic acid (PLA) resin were mixed, After adding 1 phr of polyvinyl acetate (PVAc, manufacturer: Wacker), compounding was performed to obtain a composition for biodegradable meltblown nonwoven fabric. At this time, the phr (per hundred resin) refers to the unit of input amount of material added per 100 parts by weight of polymer (1 phr: 1 g of input amount for 100 g of polymer).
- a biodegradable meltblown nonwoven fabric was manufactured in the same manner as Example 1, except that each component and process conditions were changed as shown in Table 1 below.
- Examples 6, 7 and 12 were the second PHA resin (scPHA, 4-hydroxybutyrate (4-HB) content: 6% by weight, weight average molecular weight (Mw): 410,000 g/mol, according to ASTM D1238.
- PHA polyhydroxyalkanoate
- PHA polyhydroxyalkanoate
- melt flow index (g/10min) was measured at 190°C and 2.16 kg or 210°C and 2.16 kg according to ASTM D1238. did.
- melt flow index was measured according to ASTM D1238 for biodegradable pellets produced by mixing and melt-extruding a biodegradable meltblown nonwoven composition into a twin screw extruder.
- the glass transition temperature (Tg) and melting temperature (Tm) were measured using differential scanning calorimetry (DSC).
- the temperature was raised from 40° C. to 180° C. at a rate of 10° C./min using a differential scanning calorimeter, and then heated to 10° C.
- the glass transition temperature (Tg) and melting temperature (Tm) were measured from the heat flow curve obtained while cooling to -50°C at a rate of °C/min.
- thermogravimetric analyzer TGA
- the temperature at which 5% of the weight of the composition for biodegradable fibers decreases is determined from the weight change curve obtained by raising the temperature from room temperature to 600°C at a rate of 10°C/min using a thermogravimetric analyzer (TGA). Measured by temperature (Td).
- melt flow index (g/10min, 190°C, 2.16 kg) melt flow index (g/10min, 210°C, 2.16 kg) Tg(°C) Tm(°C) Td(°C)
- melt flow index (g/10min, 210°C, 2.16 kg) Tg(°C) Tm(°C) Td(°C)
- melt flow index (g/10min, 210°C, 2.16 kg) Tg(°C) Tm(°C) Td(°C)
- Example 8 16 66 -14 173 276
- Example 10 16 67 -19 173 264
- Example 12 12 105 -13 172 293
- Example 14 32 110 -18 170 273
- the fibers constituting the biodegradable meltblown nonwoven fabric were analyzed using scanning electron microscopy (SEM). The diameter was measured and its standard deviation was calculated.
- filter efficiencies of 0.3 ⁇ m and 0.5 ⁇ m under the conditions of an area of 38 cm 2 and a pressure of 200 Pa according to KS K ISO 9073-152007 was measured. Specifically, the filter efficiency was measured by spraying particles with an average particle diameter of 0.3 ⁇ m and 0.5 ⁇ m onto the nonwoven fabric.
- the biodegradable meltblown nonwoven fabrics of Examples 1 to 15 had both the average diameter and standard deviation of the fibers constituting them within the desirable range, and the filter efficiency of the nonwoven fabric was also excellent.
- Figure 1 shows a scanning electron microscopy (SEM, 100 magnification) image of the biodegradable meltblown nonwoven fabric of Example 14, and Figure 2 shows a scanning electron microscope (SEM, 100 magnification) image of the biodegradable meltblown nonwoven fabric of Example 14. SEM, 1,000 magnification) images are shown.
- the biodegradable meltblown nonwoven fabric of Example 14 had excellent uniformity in the diameter of the fibers constituting it.
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Abstract
Description
| 구분 | PHA(중량%) | PLA (중량%) |
PVAc (phr) |
글리세린 스테아 레이트 (phr) |
Cu 무기입자 (phr) |
정전 처리 여부 | 부직포의 평량 (gsm) |
|
| aPHA | scPHA | |||||||
| 실시예 1 | 30 | - | 70 | 1 | - | - | ○ | 30 |
| 실시예 2 | 30 | - | 70 | 1 | - | - | Х | 30 |
| 실시예 3 | 20 | - | 80 | 1 | - | - | ○ | 30 |
| 실시예 4 | 20 | - | 80 | 1 | - | - | ○ | 40 |
| 실시예 5 | 20 | - | 80 | 1 | - | - | ○ | 50 |
| 실시예 6 | - | 30 | 70 | 1 | - | - | ○ | 30 |
| 실시예 7 | - | 30 | 70 | 1 | - | - | Х | 30 |
| 실시예 8 | 30 | - | 70 | 1 | - | 3 | ○ | 30 |
| 실시예 9 | 30 | - | 70 | 1 | - | 3 | Х | 30 |
| 실시예 10 | 30 | - | 70 | 1 | - | - | Х | 30 |
| 실시예 11 | 40 | - | 60 | 1 | - | - | Х | 30 |
| 실시예 12 | 35 | 30 | 35 | 1 | - | - | Х | 30 |
| 실시예 13 | 30 | - | 70 | 1 | 2 | - | Х | 120 |
| 실시예 14 | 30 | - | 70 | 1 | 2 | - | Х | 60 |
| 실시예 15 | 30 | - | 70 | 1 | 2 | - | Х | 30 |
| 비교예 1 | - | - | 100 | - | - | - | ○ | 30 |
| 비교예 2 | - | - | 100 | - | - | - | Х | 30 |
| 구분 | 용융흐름지수 (g/10min, 190℃, 2.16 kg) |
용융흐름지수 (g/10min, 210℃, 2.16 kg) |
Tg(℃) | Tm(℃) | Td(℃) |
| 실시예 8 | 16 | 66 | -14 | 173 | 276 |
| 실시예 10 | 16 | 67 | -19 | 173 | 264 |
| 실시예 11 | 13 | 59 | -18 | 172 | 292 |
| 실시예 12 | 12 | 105 | -13 | 172 | 293 |
| 실시예 14 | 32 | 110 | -18 | 170 | 273 |
| 구분 | 생분해성 섬유 | 부직포 | ||
| 직경의 평균값(㎛) | 직경의 표준 편차 |
0.3 ㎛ 필터 효율(%) |
0.5 ㎛ 필터 효율(%) |
|
| 실시예 1 | 1.7 | 0.81 | 29.0 | 45.0 |
| 실시예 2 | 21.0 | 32.0 | ||
| 실시예 3 | 2.3 | 1.2 | 30.0 | 41.0 |
| 실시예 4 | 46.6 | 62.9 | ||
| 실시예 5 | 57.7 | 73.4 | ||
| 실시예 6 | 1.9 | 0.59 | 32.0 | 44.0 |
| 실시예 7 | 24.2 | 36.5 | ||
| 실시예 8 | 2.2 | 0.99 | 29.0 | 45.0 |
| 실시예 9 | 24.0 | 38.0 | ||
| 실시예 10 | 3.9 | 0.43 | 9.6 | 11.7 |
| 실시예 11 | 3.3 | 0.48 | 14.0 | 20.1 |
| 실시예 12 | 18.0 | 0.52 | 8.8 | 11.0 |
| 실시예 13 | 2.2 | 0.44 | 39.6 | 60.7 |
| 실시예 14 | 1.9 | 0.80 | 57.2 | 77.1 |
| 실시예 15 | 1.8 | 0.63 | 19.7 | 29.2 |
| 비교예 1 | 2.3 | 1.0 | 82.0 | 90.0 |
| 비교예 2 | 19.0 | 27.0 | ||
Claims (21)
- 4-하이드록시부티레이트(4-HB) 반복단위를 포함하는 폴리하이드록시알카노에이트(PHA) 수지를 포함하고,ASTM D1238에 따라 210℃ 및 2.16 kg 하에서 측정된 용융흐름지수(MFI, Melt Flow Index)가 30 g/10min 이상인, 생분해성 멜트블로운 부직포용 조성물.
- 제 1 항에 있어서,상기 PHA 수지가 상기 4-하이드록시부티레이트(4-HB) 반복단위를 0.1 중량% 내지 60 중량%로 포함하는, 생분해성 멜트블로운 부직포용 조성물.
- 제 1 항에 있어서,상기 PHA 수지가 제 1 PHA 수지를 포함하고,상기 제 1 PHA 수지가 4-하이드록시부티레이트(4-HB) 반복단위를 15 중량% 내지 60 중량%로 포함하고, ASTM D1238에 따라 165℃ 및 5 kg 하에서 측정한 용융흐름지수(MFI, Melt Flow Index)가 0.1 g/10min 내지 20 g/10min인, 생분해성 멜트블로운 부직포용 조성물.
- 제 1 항에 있어서,상기 PHA 수지가 제 2 PHA 수지를 포함하고,상기 제 2 PHA 수지가 4-하이드록시부티레이트(4-HB) 반복단위를 0.1 중량% 이상 내지 30 중량%로 포함하고, ASTM D1238에 따라 165℃ 및 5 kg 하에서 측정된 용융흐름지수가 0.1 g/10min 내지 15 g/10min인, 생분해성 멜트블로운 부직포용 조성물.
- 제 1 항에 있어서,상기 생분해성 멜트블로운 부직포용 조성물이 폴리부틸렌아디페이트 테레프탈레이트(PBAT), 폴리락트산(PLA), 폴리부틸렌숙시네이트(PBS), 폴리부틸렌아디페이트(PBA), 폴리부틸렌숙시네이트-아디페이트(PBSA), 폴리부틸렌숙시네이트-테레프탈레이트(PBST), 폴리히드록시부틸레이트-발레레이트(PHBV), 폴리카프로락톤(PCL), 폴리부틸렌 숙시네이트 아디페이트 테레프탈레이트(PBSAT) 및 열가소성 전분(TPS)으로 이루어진 군으로부터 선택된 1종 이상의 생분해성 수지를 포함하는, 생분해성 멜트블로운 부직포용 조성물.
- 제 5 항에 있어서,상기 PHA 수지 및 상기 생분해성 수지의 중량비가 1 : 99 내지 99 : 1인, 생분해성 멜트블로운 부직포용 조성물.
- 제 5 항에 있어서,상기 PHA 수지 및 상기 폴리락트산(PLA) 수지의 중량비가 20 : 80 내지 70 : 30인, 생분해성 멜트블로운 부직포용 조성물.
- 제 1 항에 있어서,상기 생분해성 멜트블로운 부직포용 조성물이 안료, 색소흡수제, 광흡수제, 산화방지제, 상용화제, 중량제, 기핵제, 용융강도 증강제, 슬립제 및 유동화제로 구성된 군으로부터 선택된 1종 이상의 첨가제를 추가로 포함하는, 생분해성 멜트블로운 부직포용 조성물.
- 제 1 항에 있어서,상기 PHA 수지가 3-하이드록시부티레이트(3-HB), 3-하이드록시프로피오네이트(3-HP), 3-하이드록시헥사노에이트(3-HH), 3-하이드록시발레레이트(3-HV), 4-하이드록시발레레이트(4-HV), 5-하이드록시발레레이트(5-HV) 및 6-하이드록시헥사노에이트(6-HH)로 이루어진 군으로부터 선택된 1종 이상의 반복단위를 더 포함하는, 생분해성 멜트블로운 부직포용 조성물.
- 제 1 항에 있어서,상기 생분해성 멜트블로운 부직포용 조성물은,ASTM D1238에 따라 190℃ 및 2.16 kg 하에서 측정된 용융흐름지수가 10 g/10min 내지 30 g/10min이고,중량평균분자량이 500,000 g/mol 이하인, 생분해성 멜트블로운 부직포용 조성물.
- 생분해성 섬유를 포함하는 생분해성 멜트블로운 부직포로서,상기 생분해성 섬유는 4-하이드록시부티레이트(4-HB) 반복단위를 포함하는 폴리하이드록시알카노에이트(PHA) 수지를 포함하고,상기 생분해성 섬유의 평균 직경이 10 ㎛ 이하이고, 상기 직경에 대한 표준 편차는 1.3 이하인, 생분해성 멜트블로운 부직포.
- 제 11 항에 있어서,상기 생분해성 멜트블로운 부직포는,KS K ISO 9073-152007에 따른 0.3 ㎛에서의 필터 효율이 8% 이상이고, 0.5 ㎛에서의 필터 효율이 10% 이상이고,총 두께가 0.05 mm 내지 20 mm이고, 평량이 10 gsm 내지 500 gsm인, 생분해성 멜트블로운 부직포.
- 제 11 항에 있어서,상기 생분해성 멜트블로운 부직포의 평량 30 gsm을 기준으로,K ISO 9073-3:1989에 따른 경사 강도가 3 N 이상이고, 경사 신도가 6% 이상인, 생분해성 멜트블로운 부직포.
- 제 11 항에 있어서,상기 생분해성 섬유는 이형단면 복합섬유 이거나 이성분계 이상 또는 삼성분계 이상의 복합섬유인, 생분해성 멜트블로운 부직포.
- 제 11 항에 있어서,상기 생분해성 멜트블로운 부직포의 적어도 일면에 기능성 코팅층을 추가로 포함하는, 생분해성 멜트블로운 부직포.
- 생분해성 멜트블로운 부직포용 조성물 또는 이를 이용하여 제조된 펠렛을 용융압출한 후, 방사하는 단계를 포함하고,상기 생분해성 멜트블로운 부직포용 조성물이 4-하이드록시부티레이트(4-HB) 반복단위를 포함하는 폴리하이드록시알카노에이트(PHA) 수지를 포함하고, ASTM D1238에 따라 210℃ 및 2.16 kg 하에서 측정된 용융흐름지수(MFI, Melt Flow Index)가 30 g/10min 이상인, 생분해성 멜트블로운 부직포의 제조 방법.
- 제 16 항에 있어서,상기 용융압출 온도가 150℃ 내지 230℃인, 생분해성 멜트블로운 부직포의 제조 방법.
- 제 16 항에 있어서,상기 방사하는 단계가 상기 제조되는 생분해성 멜트블로운 부직포의 평량을 10 gsm 내지 500 gsm으로 조절하여 수행되는, 생분해성 멜트블로운 부직포의 제조 방법.
- 제 16 항에 있어서,상기 생분해성 멜트블로운 부직포용 조성물을 방사하는 단계가 시스-코어 복합 방사 장치를 이용하여 수행되는, 생분해성 멜트블로운 부직포의 제조 방법.
- 제 19 항에 있어서,상기 코어부 및 상기 시스부로 투입되는 원료의 중량비가 5 : 95 내지 95 : 5인, 생분해성 멜트블로운 부직포의 제조 방법.
- 제 19 항에 있어서,상기 생분해성 멜트블로운 부직포용 조성물이 코어부로 투입되는, 생분해성 멜트블로운 부직포의 제조 방법.
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| EP22962864.9A EP4567175A4 (en) | 2022-10-20 | 2022-11-23 | COMPOSITION FOR BIODEGRADABLE MELT-BLOWN NONWOVEN FABRIC AND BIODEGRADABLE MELT-BLOWN NONWOVEN FABRIC MANUFACTURED USING SAME |
| CN202280101016.4A CN120019180A (zh) | 2022-10-20 | 2022-11-23 | 用于可生物降解的熔喷非织造织物的组合物及使用其制造的可生物降解的熔喷非织造织物 |
| JP2025515459A JP2025531137A (ja) | 2022-10-20 | 2022-11-23 | 生分解性メルトブローン不織布用組成物、及びこれを用いて製造された生分解性メルトブローン不織布 |
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| EP4541853A4 (en) * | 2022-10-31 | 2025-10-29 | Cj Cheiljedang Corp | Composition of biodegradable resin, biodegradable non-woven fabric, and associated production process |
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|---|---|
| TWI838987B (zh) | 2024-04-11 |
| KR20240055557A (ko) | 2024-04-29 |
| EP4567175A4 (en) | 2025-09-17 |
| CN120019180A (zh) | 2025-05-16 |
| JP2025531137A (ja) | 2025-09-19 |
| EP4567175A1 (en) | 2025-06-11 |
| TW202417543A (zh) | 2024-05-01 |
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