WO2022034868A1 - ポリウレタン弾性繊維及びその巻糸体、ギャザー部材、並びに衛生材料 - Google Patents
ポリウレタン弾性繊維及びその巻糸体、ギャザー部材、並びに衛生材料 Download PDFInfo
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- WO2022034868A1 WO2022034868A1 PCT/JP2021/029432 JP2021029432W WO2022034868A1 WO 2022034868 A1 WO2022034868 A1 WO 2022034868A1 JP 2021029432 W JP2021029432 W JP 2021029432W WO 2022034868 A1 WO2022034868 A1 WO 2022034868A1
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- polyurethane elastic
- elastic fiber
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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
- D01F6/70—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyurethanes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
- A61L15/26—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/08—Polyurethanes from polyethers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
- C09J5/06—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving heating of the applied adhesive
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/06—Load-responsive characteristics
- D10B2401/061—Load-responsive characteristics elastic
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2509/00—Medical; Hygiene
Definitions
- the present invention relates to polyurethane elastic fibers and their winding bodies, gather members, and sanitary materials.
- Polyurethane elastic fibers have high elongation and excellent elastic properties.
- polyurethane polymer is a flexible and sticky material, in the manufacturing process of products using yarn, yarn breakage and production variation due to unwinding from the wound yarn, guides, and frictional resistance with rollers. Such problems are likely to occur, and these problems are very remarkable especially after long-term storage.
- a method of applying a treatment agent such as silicone oil to the yarn is known.
- the following Patent Document 1 reports a method of applying a treatment agent composed of a specific smoothing agent and a solvability improving agent to a polyurethane elastic fiber in order to solve the deterioration of the solvability over time.
- Patent Document 2 proposes the use of a treatment agent for elastic fibers in which a specific component such as dialkylsulfosuccinate is mixed in a specific amount in order to improve the solubilization property after high temperature storage.
- a specific component such as dialkylsulfosuccinate
- Patent Document 2 proposes the use of a treatment agent for elastic fibers in which a specific component such as dialkylsulfosuccinate is mixed in a specific amount in order to improve the solubilization property after high temperature storage.
- Patent Document 3 below also proposes polyurethane elastic fibers having improved heat-sealing properties by controlling the melting point of polyurethane in order to obtain sufficient adhesiveness, which is described in Patent Document 3.
- the polyurethane elastic fiber manufactured by the above method is sandwiched between non-woven fabrics to manufacture a gather member, the polyurethane elastic fiber has a low melting point, so that the unfoldability is poor, and the heat resistance is low. There is a problem that the thread breaks.
- there is a trade-off relationship between unfoldability, heat resistance, and adhesiveness and there has been no polyurethane elastic fiber that sufficiently solves the problems of heat resistance, adhesiveness, and unfoldability in the gather manufacturing process.
- the problem to be solved by the present invention is to provide a polyurethane elastic fiber suitable for a gather member and a wound yarn thereof, which have heat resistance, adhesiveness, and unfoldability. Is.
- the inventor of the present application predicts that the above-mentioned problems can be solved by controlling the ratio of the urethane bond and the urea bond constituting the polyurethane elastic fiber to a specific value. It was discovered outside and led to the completion of the present invention. That is, the present invention is as follows.
- the present invention is as follows.
- Elastic fiber [2] The polyurethane elastic fiber according to the above [1], which has a polydispersity (Mw / Mn) of 1.2 or more and 4.0 or less. [3] The polyurethane elastic fiber according to the above [1] or [2], wherein the single yarn fineness is 5 dtex or more and 40 dtex or less.
- the polyurethane elastic fiber and its winding body which is one aspect of the present invention, have the above-mentioned structure, and thus have heat resistance, adhesiveness, and unwinding property, and are suitable for gathering members. Is.
- the gather member and the sanitary material which are another aspect of the present invention, have less thread dropout and less product defects.
- the present embodiment a mode for carrying out the present invention (hereinafter referred to as “the present embodiment”) will be described in detail.
- the present invention is not limited to the following embodiments, and can be variously modified and implemented within the scope of the gist thereof.
- the polyurethane elastic fiber of the present embodiment is a polyurethane elastic fiber containing a urethane bond and a urea bond, which is a multifilament, and the ratio of the urea bond to the urethane bond is 0.05% or more and 5% or less. It is a polyurethane elastic fiber characterized by.
- the polyurethane constituting the polyurethane elastic fiber is not particularly limited as long as it has a structure polymerized from, for example, diisocyanate, polymer polyol, diol, diamine, etc., but is thermoplastic. Is preferable. Further, the polymerization method is not particularly limited.
- the polyurethane may be, for example, a polyurethane polymerized from a low molecular weight diamine as a chain extender composed of a diisocyanate, a polymer polyol, and an active hydrogen compound (hereinafter, also referred to as “polyurethane urea”), or may be used.
- Polyurethane (hereinafter, also referred to as "polyurethane urethane") polymerized from a low molecular weight diol or the like as a chain extender composed of a diisocyanate, a polymer polyol, and an active hydrogen compound may be used. Glycols and isocyanates having trifunctionality or higher may be used as long as they do not interfere with the desired effects of the present invention.
- thermoplastic has a reversible property that it can be melted by heating at a decomposition temperature or lower, exhibits plastic flow while in a molten state, and is solidified by cooling. Means. Generally, the thermoplastic polyurethane resin starts to decompose at 230 ° C. or higher.
- polymer polyol examples include, but are not limited to, polymer diols such as polyether diols, polyester diols, and polycarbonate diols. From the viewpoint of hydrolysis resistance, the polymer polyol is preferably a polyether-based polyol, and more preferably a polyether-based diol.
- polyether polyol examples include polyethylene oxide, polyethylene glycol, polyethylene glycol derivative, polypropylene glycol, polytetramethylene ether glycol, copolymerized diol composed of tetrahydrofuran (THF) and neopentyl glycol, and THF and 3-methyltetrahydrofuran. Examples thereof include copolymer diols. These polyether polyols may be used alone or in combination of two or more.
- the number average molecular weight of the polymer diol is preferably 1000 or more and 8000 or less.
- the polyether polyol is preferably polytetramethylene ether glycol, a copolymer diol which is a copolymer of tetrahydrofuran (THF) and neopentyl glycol, and a polyol blended thereof. ..
- diisocyanate examples include aromatic diisocyanates, alicyclic diisocyanates, and aliphatic diisocyanates.
- aromatic diisocyanate examples include, but are not limited to, diphenylmethane diisocyanate (hereinafter, also referred to as “MDI”), tolylene diisocyanate, 1,4-diisocyanate benzene, xylylene diisocyanate, 2,6-naphthalene diisocyanate and the like. Be done.
- alicyclic diisocyanate and the aliphatic diisocyanate examples include methylenebis (cyclohexylisocyanate) (hereinafter, also referred to as “H12MDI”), isophorone diisocyanate, methylcyclohexane2,4-diisocyanate, methylcyclohexane2,6-diisocyanate, and cyclohexane.
- H12MDI methylenebis (cyclohexylisocyanate)
- isophorone diisocyanate examples include 1,4-diisocyanate, hexahydroxylylene diisocyanate, hexahydrotoluene diisocyanate, octahydro 1,5-naphthalenedi isocyanate and the like.
- diisocyanates may be used alone or in combination of two or more.
- the diisocyanate is preferably an aromatic diisocyanate, and more preferably MDI.
- the chain extender and chain extender made of an active hydrogen compound are preferably at least one selected from the group consisting of low molecular weight diamines and low molecular weight diols.
- the chain extender may have both a hydroxyl group and an amino group in the molecule, such as ethanolamine.
- the low molecular weight diamine as a chain extender chain extender composed of an active hydrogen compound is not limited to the following, and is, for example, hydrazine, ethylenediamine, 1,2-propanediamine, 1,3-propanediamine, 2-methyl-1.
- the chain extender low molecular weight diol composed of an active hydrogen compound is not limited to the following, but is limited to ethylene glycol, 1,3-propanediol, 1,4-butanediol, bishydroxyethoxybenzene, bishydroxyethylene terephthalate, and 1-methyl. -1,2-Ethandiol and the like can be mentioned.
- One of these low molecular weight diols may be used alone, or two or more thereof may be used in combination.
- the low molecular weight diol is preferably a diol having 2 to 6 carbon atoms, and more preferably 1,4-butanediol.
- Polyurethane polymerization can be produced by a known polyurethane reaction technique and may be produced by either a one-shot method or a prepolymer method.
- the prepolymer method the polymer polyol and the diisocyanate are placed in a reaction tank having a hot water jacket and a stirrer under a nitrogen purge, preferably 1.0: 1.8 to 3.0, more preferably 1.0 in terms of molar ratio. : Add at 2.0 to 2.5, and the prepolymer reaction is preferably carried out at 40 ° C. or higher and 100 ° C. or lower, more preferably 50 ° C. or higher and 80 ° C. or lower to obtain a double-ended isocyanate group prepolymer.
- an active hydrogen compound is added to the two-terminal isocyanate group prepolymer in an amount approximately equal to the number of functional groups of the isocyanate terminal groups, and a chain extension reaction is carried out.
- the equivalent ratio is preferably 0.95 or more and 1.1 or less, and more preferably 0.99 or more and 1.05 or less with respect to the isocyanate terminal group.
- solid phase polymerization can be carried out to obtain polyurethane having a predetermined molecular weight.
- an active hydrogen compound is preferably added as it is at 40 ° C. or higher and 100 ° C.
- the cylinder temperature of the polymerization zone is preferably 160 ° C. or higher and 240 ° C. or lower using a cylindrical pipe form or a twin-screw extruder, and the polymer is continuously or semi-continuously prepared.
- solid-state polymerization may be carried out at preferably 60 ° C. or higher and 220 ° C. or lower, more preferably 70 ° C. or higher and 150 ° C. or lower.
- the polyurethane elastic fiber is a polymer other than polyurethane and additives such as antioxidants, lightfasteners, ultraviolet absorbers, gas discoloration inhibitors, dyes, as long as the desired effects of the present invention are not lost. It may contain an activator, a matting agent, a lubricant and the like.
- a treatment agent such as an oil agent may be applied to the polyurethane elastic fiber from the viewpoint of unresolvability, processability and the like.
- the treatment agent include, but are not limited to, silicone-based oils such as dimethyl silicone, mineral oil-based oils, and combinations thereof.
- the method of applying the treatment agent is not particularly limited, and examples thereof include a method of applying with an oiling roller or the like.
- the spinning method is not particularly limited as long as desired physical properties can be obtained, but a melt spinning method is preferable.
- a melt spinning method for example, in addition to a method in which a polyurethane elastic chip is put into an extruder and heated to be melt-spun, a method in which a polyurethane elastic chip is melted and then a polyisocyanate compound is mixed and spun, both ends are used. Examples thereof include a method in which a reaction product of both-terminal isocyanate-based prepolymer and an active hydrogen compound is added to the isocyanate-based prepolymer and continuously spun without going through chipping.
- Polyurethane charged into the extruder is weighed by a weighing pump and introduced into the spinning head. If necessary, after removing foreign matter by filtration using a wire mesh or glass beads in the spinning head, it is discharged from the mouthpiece, air-cooled in a cold air chamber, and after the treatment agent is applied, it goes through a godet roll. Is taken up.
- the method for controlling the ratio of the urea bond to the urethane bond is not particularly limited, but for example, the urethane bond of the polyurethane is thermally decomposed in the extruder, and the generated isocyanate group is appropriately mixed with water.
- examples thereof include a method of converting into a urea bond by reacting. Specific methods include a method of impregnating the polyurethane resin to be charged into the extruder with a certain amount of water, a method of injecting high-temperature steam onto the polyurethane of the yarn discharged from the mouthpiece, and a method of using a goded roll during winding. Examples include a method of injecting high-temperature steam between the yarns and a method of applying a treatment agent containing water to the yarn at a high temperature.
- the reason why the heat resistance, the adhesiveness, and the unfoldability can be improved by setting the ratio of the urea bond to the urethane bond to 0.05% or more and 5% or less is not yet clear.
- the ratio of the urea bond to the urethane bond is the ratio of the urea bond to the urethane bond in the polymer mainly composed of the polyurethane elastic fiber.
- the ratio of the urea bond to the urethane bond is preferably 0.05% or more and 3% or less, and more preferably 0.1% or more and 2% or less.
- the weight average molecular weight (Mw) of the obtained polyurethane elastic fiber is preferably 100,000 or more and 800,000 or less, more preferably 100,000 or more and 500,000 or less, and further preferably 100,000 or more and 500,000 or less when measured by GPC using polystyrene as a standard. It is preferably 120,000 or more and 300,000 or less.
- the number average molecular weight (Mn) of the obtained polyurethane elastic fiber is preferably 50,000 or more and 400,000 or less, more preferably 50,000 or more and 250,000 or less, and further preferably, when measured by GPC using polystyrene as a standard. Is 60,000 or more and 150,000 or less.
- the ratio of the urea bond to the urethane bond is 0.05% or more and 5% or less
- the polydispersity (Mw / Mn) of the obtained polyurethane elastic fiber is determined by GPC.
- the dispersity (Mw / Mn) is more preferably 1.2 or more and 3.0 or less, further preferably 1.2 or more and 2.5 or less, and most preferably 1.5 or more and 2.5 or less. be.
- the ratio of the urea bond to the urethane bond is 0.05% or more and 5% or less, and the urea bond on the yarn surface is finely dispersed in the urethane bond by reducing the degree of polydispersion.
- the method for controlling the polydispersity (Mw / Mn) of the polyurethane elastic fiber is not particularly limited, but a method using a polymer polyol having a controlled polydispersity (Mw / Mn) or a solid phase polymerization temperature at a low temperature is performed. The method is preferably used.
- the polyurethane elastic fiber of the present embodiment does not have an allophanate bond in which an isocyanate group is reacted and a urethane bond is crosslinked.
- an allophanate bond in which an isocyanate group is reacted and a urethane bond is crosslinked.
- a bullet bond formed by reacting the isocyanate group with the urea bond is also exemplified as a crosslink formed by the reaction of the isocyanate group, but the polyurethane elastic fiber of the present embodiment has a urea bond. Since the amount of the burette bond is small, the amount of buretto bond that can be formed is also extremely small, and the influence of the burette bond can be ignored.
- the elongation rate of the polyurethane elastic fiber on the winding body is 0.05% or more and 10% or less from the viewpoint of improving the unfoldability and the adhesiveness. Is preferable, more preferably 0.05% or more and 5% or less, and further preferably 0.1% or more and 5% or less. The reason why the solvability can be improved by setting the elongation rate to 0.05% or more and 10% or less is not yet clear, but the inventor estimates as follows.
- a method of winding on a paper tube is preferably used.
- the single yarn fineness is preferably 5 dtex or more and 40 dtex or less, and more preferably 5 dtex or more and 30 dtex or less, from the viewpoint of improving the unfoldability and the adhesiveness.
- the solvability can be improved.
- the surface area of the yarn can be increased, so that the coating area of the hot melt can be increased and the adhesiveness can be improved.
- the method for producing the polyurethane elastic fiber that controls the single yarn fineness is not particularly limited, but for example, a method of adjusting the discharge amount of polyurethane and the number of holes of the nozzle to be discharged is preferably used.
- the number of filaments is preferably 15 or more, more preferably 20 or more, from the viewpoint of improving the unfoldability and the adhesiveness.
- the method for producing the polyurethane elastic fiber for controlling the number of filaments is not particularly limited, but for example, a method for adjusting the number of holes in the nozzle for discharging polyurethane is preferably used.
- the gather member containing the polyurethane elastic fiber of the present embodiment and the sanitary material are also one aspect of the present invention.
- sanitary materials include absorbent articles such as disposable disposable diapers and sanitary products, masks, bandages, and the like.
- a gather member in which elastic fibers are adhered to a non-woven fabric via a hot melt is used for a waist portion and a leg circumference portion, and the gather member of the present embodiment is preferably used for such a portion. Since the polyurethane elastic fiber of the present embodiment has good heat resistance, adhesiveness, and unfoldability, gather members and sanitary materials can be produced in high yield in the processing process.
- the polyurethane elastic fiber is dissolved in a dimethylacetamide solution containing 0.02 mol / L of LiBr so that the solid content concentration becomes 0.25% by weight, and the sample is used as a measurement sample.
- the prepared sample is measured with GPC-101 manufactured by Shodex under the conditions shown below.
- the molecular weight of the polyurethane elastic fiber is the number average molecular weight (Mn) and the weight average molecular weight calculated from the calibration curve obtained by measuring all the polystyrene standard samples (SM-105) manufactured by Shodex and obtaining the peak top molecular weight. Refers to (Mw).
- the degree of polydispersity of the molecular weight refers to the weight average molecular weight divided by the number average molecular weight (Mw / Mn).
- ⁇ NMR measurement (ratio of urea bond to urethane bond)>
- the polyurethane elastic fiber is washed with petroleum ether to remove the oil, and then soxley extraction is performed using chloroform as a solvent for 5 hours to remove the organic compound-based additive.
- the chloroform is dried and removed at 80 ° C. for 5 hours under a vacuum of ⁇ 0.1 MPa, the polyurethane elastic fiber and the internal standard dimethylsulfoxide are measured in a predetermined amount, and NMR is measured under the following conditions to identify the urethane bond and the urea bond.
- the content was calculated, and the ratio of urea bond to urethane bond was calculated by dividing the content of urea bond by the content of urethane bond.
- the content of the urethane bond and the urea bond can be calculated from the integral value of the hydrogen signal with dimethyl sulfoxide, which is an internal standard. For example, when calculating the content of urethane bond, it can be calculated by comparing the integral value of hydrogen of the urethane bond and the integral value of hydrogen of the methyl group of dimethyl sulfoxide. Further, when calculating the content of the urea bond, it can be calculated by comparing the integral value of hydrogen of the urea bond and the integral value of hydrogen of the methyl group of dimethyl sulfoxide.
- the hydrogen signal of the aromatic urethane bond is 9.2 to 9.8 ppm
- the hydrogen signal of the aromatic urea bond is 8.4 to 9.0 ppm
- the hydrogen signal of the aliphatic urethane bond is 6.7 to 7.
- Hydrogen signals of 3 ppm and aliphatic urethane bonds are often observed at 6.0 to 6.7 ppm, but this is not the case.
- ⁇ DMAc dissolution test 0.2 g of polyurethane elastic fiber is precisely weighed, immersed in 10 g of DMAc, and stirred at 20 ° C. for 48 hours. After stirring, if the massive polymer having a diameter of 1 mm or more could not be visually confirmed, it was determined that the polymer was dissolved in DMAc.
- ⁇ NMR measurement quantitative allophanate bond
- the ratio of the allophanate bond to the urethane bond can be calculated by comparing the integrated values of the respective hydrogens, and when this ratio is less than 0.05%, it is defined that the allophanate group is not contained.
- the hydrogen signal of the allophanate bond is often observed at 10.5 to 11.0 ppm, but this is not the case.
- Measuring device JEOL ECS400 Measurement nucleus: 1 H Resonance frequency: 400MHz Number of integrations: 256 Measurement temperature: Room temperature Solvent: Dimethylformamide deuterated Measurement concentration: 1.5% by weight Chemical shift criteria: Dimethylformamide (8.0233 ppm)
- the elongation rate (%) of the polyurethane elastic fiber on the winding body was measured and calculated by the following procedure. -The polyurethane elastic fiber was unwound from the polyurethane elastic fiber winding body by 0.5 m with a relaxed length (hereinafter, also simply referred to as "relaxed length") to prepare a sample, and the sample weight (g) was measured. From the following formula, the fineness (relaxed fineness A (dtex)) of the polyurethane elastic fiber in the relaxed state was calculated. The measurement was performed 4 times and the average value was taken.
- the "relaxed state” means a state in which the yarn is unwound from cheese and then left unloaded for 2 hours or more.
- Relax fineness A (dtex) sample weight (g) x 10000 / relax length (m) -The polyurethane elastic fiber was unwound by feeding 50 m from the polyurethane elastic fiber winding body by a delivery roll while maintaining the elongation rate. The weight (g) of the unwound yarn was measured. From the following formula, the fineness (print fineness B (dtex)) of the polyurethane elastic fiber in the stretched state was calculated.
- Thread swing width is 0 mm or more and less than 2 mm 4: Thread swing width is 2 mm or more and less than 4 mm 3: Thread swing width is 4 mm or more and less than 6 mm 2: Thread break width is 6 mm or more or thread break 1: Thread break Note that 3 minutes In the visual observation, when the thread swing width fluctuates between the two criteria of the above evaluation criteria, the evaluation result has a wide range such as "3 to 4".
- the test yarn with an initial length of 7 cm was stretched by 200% to 21 cm, pressed against a cylindrical hot body with a diameter of 6 cm at a surface temperature of 150 ° C. (contact portion 1 cm), and the number of seconds until cutting was measured. Evaluated according to the five-level evaluation criteria of: 5: The number of seconds until disconnection was 60 seconds or more. 4: The number of seconds until disconnection was 30 seconds or more and less than 60 seconds. 3: The number of seconds until disconnection was 10 seconds or more and less than 30 seconds. 2: The number of seconds until disconnection was 5 seconds or more and less than 10 seconds. 1: The number of seconds before disconnection was less than 5 seconds.
- a hot melt adhesive (765E manufactured by Henkel Japan Co., Ltd.) melted at 150 ° C. is arranged in parallel with 5 polyurethane elastic fibers at intervals of 7 mm so that the length is twice the original length.
- the polyurethane elastic fiber coated with the hot melt adhesive is continuously coated so that the amount of adhesion is 0.04 g / m per one polyurethane elastic fiber stretched and stretched by the V slit.
- a gather member was produced by continuously crimping while pushing with an air cylinder (CQ2WB100-50DZ manufactured by SMC Co., Ltd.) supplied with an air pressure of 0.5 MPa. The produced gather is immediately cut to a length of 250 mm to 300 mm in the thread length direction (the length of the gather member at this time is the initial length), and stretched in the thread length direction until it becomes twice the initial length.
- Eltas guard registered trademark
- a gather member was produced by continuously crimping while pushing with an air cylinder (CQ2WB100-50DZ manufactured by SMC Co., Ltd.) supplied with an air pressure of 0.5 MPa.
- the produced gather is immediately cut to a length of 250 mm to 300 mm in the thread length direction (the length of the gather member at this time is the initial length), and stretched in the thread length direction until it becomes twice the initial length.
- Adhesive retention rate 100 x (measured length mm after 5 hours) / 200 mm Calculated by The higher the retention rate, the less slip-in of polyurethane elastic fibers during product manufacturing and wearing. The measurement was performed 10 times per same sample, and the slip-in incidence rate was determined based on the following evaluation criteria using the number of lines less than 80%.
- Evaluation 2 is given in any of unresolvability, heat resistance, and adhesiveness, but evaluation 1 is not seen. Thread breakage rarely occurs in the processing process. 1: There is a rating of 1 in any of unwinding property, heat resistance, and adhesiveness, and thread breakage occurs so frequently that continuous production cannot be performed in the processing process.
- Example 1 2400 g of polytetramethylene ether diol having a number average molecular weight of 1800 and a polydispersity (Mw / Mn) of 1.2 in GPC and 750.75 g of 4,4'-diphenylmethane diisocyanate were mixed in a dry nitrogen atmosphere at 60 ° C. for 3 The reaction was carried out for hours under stirring to obtain a polyurethane prepolymer capped with terminal isocyanate. To this polyurethane prepolymer, 150.95 g of 1,4-butanediol was added and stirred for 15 minutes to obtain a polyurethane having a viscosity of 2000 poise (30 ° C.).
- This polyurethane resin had a weight average molecular weight of 200,000 and a polydispersity (Mw / Mn) of 2.0 in GPC, and no urea bond was observed.
- the polyurethane resin thus obtained was pulverized into a powder of about 3 mm by a crusher UG-280 manufactured by Horai Co., Ltd.
- the crushed chips were dried in a dehumidifying dryer under a temperature condition of 110 ° C. to a moisture content of 100 ppm, and then polyurethane resin powder was charged from a hopper and melted in an extruder. It was weighed and pressurized by a gear pump installed on the head, filtered through a filter, and then discharged from a nozzle having a diameter of 0.23 mm and a diameter of 60 holes at a speed of 31 g / min. Using a steam ring installed directly under the spun, the discharged yarn is sprayed with steam at 200 ° C.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 180,000, the polydispersity (Mw / Mn) is 2.0, the ratio of urea bond to urethane bond is 0.5%, there is no cross-linking including allophanate bond, and winding.
- the elongation rate in the yarn was 2.0%.
- an oil agent composed of 67% by mass of polydimethylsiloxane, 30% by mass of mineral oil, and 3.0% by mass of amino-modified silicone was used as the surface treatment agent.
- Example 2 Polyurethane elastic fibers of 620 dtex / 60 filaments were obtained by the same method as in Example 1 except that the temperature of the steam sprayed directly under the spinneret was set to 180 ° C. and melt spinning was performed.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 180,000, the polydispersity (Mw / Mn) is 2.0, the ratio of urea bond to urethane bond is 0.05%, there is no cross-linking including allophanate bond, and winding.
- the elongation rate in the yarn was 2.0%.
- Example 3 Polyurethane elastic fibers of 620 dtex / 60 filaments were obtained by the same method as in Example 1 except that the temperature of the steam sprayed directly under the spinneret was set to 190 ° C. and melt spinning was performed.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 180,000, the polydispersity (Mw / Mn) is 2.0, the ratio of urea bond to urethane bond is 0.1%, there is no cross-linking including allophanate bond, and winding.
- the elongation rate in the yarn was 2.0%.
- Example 4 Polyurethane elastic fibers of 620 dtex / 60 filaments were obtained by the same method as in Example 1 except that the range of steam sprayed directly under the spun was set to 1 cm to 7 cm from the spun surface and melt spinning was performed.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 180,000, the polydispersity (Mw / Mn) is 2.0, the ratio of urea bond to urethane bond is 2.0%, there is no cross-linking including allophanate bond, and winding.
- the elongation rate in the yarn was 2.0%.
- Example 49 Polyurethane elastic fibers of 620 dtex / 60 filaments were obtained by the same method as in Example 1 except that the range of steam sprayed directly under the spun was set to 1 cm to 10 cm from the spun surface and melt spinning was performed.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 180,000, the polydispersity (Mw / Mn) is 2.0, the ratio of urea bond to urethane bond is 3.0%, there is no cross-linking including allophanate bond, and winding.
- the elongation rate in the yarn was 2.0%.
- Example 6 Polyurethane elastic fibers of 620 dtex / 60 filaments were obtained by the same method as in Example 1 except that the range of steam sprayed directly under the spun was set to 1 cm to 15 cm from the spun surface and melt spinning was performed.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 180,000, the polydispersity (Mw / Mn) is 2.0, the ratio of urea bond to urethane bond is 5.0%, there is no cross-linking including allophanate bond, and winding.
- the elongation rate in the yarn was 2.0%.
- Example 7 Polyurethane elastic fibers were produced in the same manner as in Example 1 except that the annealing conditions in the hot air oven were set at 80 ° C. for 24 hours to obtain polyurethane elastic fibers, and 620 dtex / 60 filament polyurethane elastic fibers were obtained.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 120,000
- the polydispersity (Mw / Mn) is 1.2
- the ratio of urea bond to urethane bond is 0.5%
- there is no cross-linking including allophanate bond and winding.
- the elongation rate in the yarn was 2.0%.
- Example 8 A polyurethane resin was produced in the same manner as in Example 1 except that the annealing conditions in a hot air oven were set at 90 ° C. for 24 hours to obtain a polyurethane resin, and 620 dtex / 60 filament polyurethane elastic fibers were obtained.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 150,000, the polydispersity (Mw / Mn) is 1.5, the ratio of urea bond to urethane bond is 0.5%, there is no cross-linking including allophanate bond, and winding.
- the elongation rate in the yarn was 2.0%.
- Example 9 A polyurethane resin was produced in the same manner as in Example 1 except that the annealing conditions in a hot air oven were set at 130 ° C. for 12 hours to obtain a polyurethane resin, and 620 dtex / 60 filament polyurethane elastic fibers were obtained.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 200,000, the polydispersity (Mw / Mn) is 2.5, the ratio of urea bond to urethane bond is 0.5%, there is no cross-linking including allophanate bond, and winding.
- the elongation rate in the yarn was 2.0%.
- Example 10 A polyurethane resin was produced in the same manner as in Example 1 except that the annealing conditions in a hot air oven were set at 150 ° C. for 8 hours to obtain a polyurethane resin, and 620 dtex / 60 filament polyurethane elastic fibers were obtained.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 240,000, the polydispersity (Mw / Mn) is 3.0, the ratio of urea bond to urethane bond is 0.5%, there is no cross-linking including allophanate bond, and winding.
- the elongation rate in the yarn was 2.0%.
- Example 11 A polyurethane resin was obtained by using a polytetramethylene ether diol having a number average molecular weight of 2000 and a polydispersity (Mw / Mn) of 1.5 in GPC and setting the annealing conditions in a hot air oven at 150 ° C. for 8 hours.
- a polyurethane resin was produced in the same manner as in Example 1 to obtain 620 dtex / 60 filament polyurethane elastic fibers.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 280,000, the polydispersity (Mw / Mn) is 4.0, the ratio of urea bond to urethane bond is 0.5%, there is no cross-linking including allophanate bond, and winding.
- the elongation rate in the yarn was 2.0%.
- Example 12 A polyurethane resin was obtained by using a polytetramethylene ether diol having a number average molecular weight of 2000 and a polydispersity (Mw / Mn) of 1.5 in GPC and setting the annealing conditions in a hot air oven at 180 ° C. for 2 hours.
- a polyurethane resin was produced in the same manner as in Example 1 to obtain 620 dtex / 60 filament polyurethane elastic fibers.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 350,000, the polydispersity (Mw / Mn) is 5.0, the ratio of urea bond to urethane bond is 0.5%, there is no cross-linking including allophanate bond, and winding.
- the elongation rate in the yarn was 2.0%.
- a polyurethane resin was produced in 620 dtex / 60 filaments of polyurethane elastic fiber.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 180,000, the polydispersity (Mw / Mn) is 2.0, the ratio of urea bond to urethane bond is 0.5%, there is no cross-linking including allophanate bond, and winding.
- the elongation rate in the yarn was 0.05%.
- a polyurethane resin was produced in 620 dtex / 60 filaments of polyurethane elastic fiber.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 180,000, the polydispersity (Mw / Mn) is 2.0, the ratio of urea bond to urethane bond is 0.5%, there is no cross-linking including allophanate bond, and winding.
- the elongation rate in the thread was 0.1%.
- a polyurethane resin was produced in 620 dtex / 60 filaments of polyurethane elastic fiber.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 180,000, the polydispersity (Mw / Mn) is 2.0, the ratio of urea bond to urethane bond is 0.5%, there is no cross-linking including allophanate bond, and winding.
- the elongation rate in the yarn was 1%.
- a polyurethane resin was produced in 620 dtex / 60 filaments of polyurethane elastic fiber.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 180,000, the polydispersity (Mw / Mn) is 2.0, the ratio of urea bond to urethane bond is 0.5%, there is no cross-linking including allophanate bond, and winding.
- the elongation rate in the thread was 5%.
- a polyurethane resin was produced in 620 dtex / 60 filaments of polyurethane elastic fiber.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 180,000, the polydispersity (Mw / Mn) is 2.0, the ratio of urea bond to urethane bond is 0.5%, there is no cross-linking including allophanate bond, and winding.
- the elongation rate in the thread was 10%.
- a polyurethane resin was produced in 620 dtex / 60 filaments of polyurethane elastic fiber.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 180,000, the polydispersity (Mw / Mn) is 2.0, the ratio of urea bond to urethane bond is 0.5%, there is no cross-linking including allophanate bond, and winding.
- the elongation rate in the thread was 12%.
- Example 19 After melting the polyurethane in the extruder, the polyurethane resin was produced by the same method as in Example 1 except that the polyurethane was discharged from a nozzle having a diameter of 0.23 mm and 30 holes at a rate of 15.5 g / min, and 310 dtex /. 30 filament polyurethane elastic fibers were obtained.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 180,000, the polydispersity (Mw / Mn) is 2.0, the ratio of urea bond to urethane bond is 0.5%, there is no cross-linking including allophanate bond, and winding.
- the elongation rate in the yarn was 2%.
- Example 20 Polyurethane resin was produced in the same manner as in Example 1 except that polyurethane was melted in an extruder and then discharged from a nozzle having a diameter of 0.23 mm and 90 holes at a rate of 47 g / min, and 940 dtex / 90 filament was produced. Polyurethane elastic fiber was obtained. The weight average molecular weight of this polyurethane elastic fiber in GPC is 180,000, the polydispersity (Mw / Mn) is 2.0, the ratio of urea bond to urethane bond is 0.5%, there is no cross-linking including allophanate bond, and winding. The elongation rate in the yarn was 2%.
- Example 21 Polyurethane resin was produced in the same manner as in Example 1 except that the polyurethane was melted in an extruder and then discharged from a nozzle having a diameter of 0.23 mm and 120 holes at a rate of 61 g / min, and the polyurethane resin was produced at 1220 dtex / 120 filament. Polyurethane elastic fiber was obtained. The weight average molecular weight of this polyurethane elastic fiber in GPC is 180,000, the polydispersity (Mw / Mn) is 2.0, the ratio of urea bond to urethane bond is 0.5%, there is no cross-linking including allophanate bond, and winding. The elongation rate in the yarn was 2%.
- Example 22 Polyurethane resin was produced in the same manner as in Example 1 except that polyurethane was melted in an extruder and then discharged from a nozzle having a diameter of 0.23 mm and 24 holes to obtain 620 dtex / 24 filament polyurethane elastic fibers. rice field.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 180,000, the polydispersity (Mw / Mn) is 2.0, the ratio of urea bond to urethane bond is 0.5%, there is no cross-linking including allophanate bond, and winding.
- the elongation rate in the yarn was 2%.
- Example 23 Polyurethane resin was produced in the same manner as in Example 1 except that polyurethane was melted in an extruder and then discharged from a nozzle having a diameter of 0.23 mm and 16 holes to obtain 620 dtex / 16 filament polyurethane elastic fibers. rice field.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 180,000, the polydispersity (Mw / Mn) is 2.0, the ratio of urea bond to urethane bond is 0.5%, and there is no cross-linking containing allophanate-bonded isocyanate group.
- the elongation rate in the winding body was 2%.
- Example 24 Polyurethane resin was produced in the same manner as in Example 1 except that polyurethane was melted in an extruder and then discharged from a nozzle having a diameter of 0.23 mm and 12 holes to obtain 620 dtex / 12 filament polyurethane elastic fibers. rice field.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 180,000, the polydispersity (Mw / Mn) is 2.0, the ratio of urea bond to urethane bond is 0.5%, there is no cross-linking including allophanate bond, and winding.
- the elongation rate in the yarn was 2%.
- Example 25 A polyurethane resin was produced in the same manner as in Example 1 except that the amount of 1,4-butanediol used in the polymerization reaction was changed to 140.75 g, and 620 dtex / 60 filament polyurethane elastic fibers were obtained.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 180,000, the polydispersity (Mw / Mn) is 2.0, the ratio of urea bond to urethane bond is 0.5%, and the elongation rate in the wound body is 2. It was 0%.
- This polyurethane elastic fiber was dissolved in DMAc, but had an allophanate bond of 0.3% with respect to the urethane bond in NMR.
- Example 1 Polyurethane elastic fibers of 620 dtex / 60 filaments were obtained by the same method as in Example 1 except that the temperature of the steam sprayed directly under the spinneret was set to 170 ° C. and melt spinning was performed.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 180,000, the polydispersity (Mw / Mn) is 2.0, the ratio of urea bond to urethane bond is 0.03%, there is no cross-linking including allophanate bond, and winding.
- the elongation rate in the yarn was 2.0%.
- Example 2 Polyurethane elastic fibers of 620 dtex / 60 filaments were obtained by the same method as in Example 1 except that the range of steam sprayed directly under the spun was set to 1 cm to 20 cm from the spun surface and melt spinning was performed.
- the weight average molecular weight of this polyurethane elastic fiber in GPC is 180,000, the polydispersity (Mw / Mn) is 2.0, the ratio of urea bond to urethane bond is 6.0%, there is no cross-linking including allophanate bond, and winding.
- the elongation rate in the yarn was 2.0%.
- Tables 1 to 3 below show the manufacturing conditions, the measurement results of each characteristic of the obtained polyurethane elastic fiber, etc. in each of the above Examples and Comparative Examples.
- the polyurethane elastic fiber according to the present invention can be suitably used for manufacturing inners, stockings, compression wear, diapers, etc., and has good heat resistance, adhesiveness, and unfoldability particularly in the manufacturing process of gather members. The occurrence of thread breakage can be reduced.
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Abstract
Description
それらの問題を解決するために、シリコーンオイル等の処理剤を糸に付与する方法が知られている。
以下の特許文献1では、経日的な解舒性の悪化を解決するために、ポリウレタン弾性繊維へ特定の平滑剤と解舒性向上剤からなる処理剤を付与する手法が報告されている。
また、以下の特許文献2では、高温保管後の解舒性を改善するためにジアルキルスルホコハク酸塩のような特定成分を特定量混合した弾性繊維用処理剤の使用が提案されている。
しかしながら、特許文献1又は2に記載の方法で製造されるポリウレタン弾性繊維を不織布に挟み込みギャザー部材を製造すると、ポリウレタン弾性繊維の表面の処理剤の付着量が不安定であるため、十分な接着性を得ることができず、製品中で糸がスリップインしてしまうという問題がある。
以上のように、解舒性と耐熱性、接着性はトレードオフの関係にあり、ギャザー製造工程において、耐熱性、接着性、解舒性の問題を十分に解決したポリウレタン弾性繊維はなかった。
すなわち本発明は以下の通りのものである。
[1]マルチフィラメントである、ウレタン結合とウレア結合とを含むポリウレタン弾性繊維であって、該ウレタン結合に対する該ウレア結合の比率が0.05%以上5%以下であることを特徴とする、ポリウレタン弾性繊維。
[2]多分散度(Mw/Mn)が1.2以上4.0以下である、前記[1]に記載のポリウレタン弾性繊維。
[3]単糸繊度が5dtex以上40dtex以下である、前記[1]又は[2]に記載のポリウレタン弾性繊維。
[4]フィラメント数が15以上である、前記[1]~[3]のいずれかに記載のポリウレタン弾性繊維。
[5]熱可塑性である、前記[1]~[4]のいずれかに記載のポリウレタン弾性繊維。
[6]アロファネート結合を含む架橋を有しない、前記[1]~[5]のいずれかに記載のポリウレタン弾性繊維。
[7]前記[1]~[6]のいずれかに記載のポリウレタン弾性繊維を含む巻糸体において、該巻糸体上のポリウレタン弾性繊維の伸長率が0.05%以上10%以下である、ポリウレタン弾性繊維の巻糸体。
[8]前記[1]~[6]のいずれかに記載のポリウレタン弾性繊維を含む、ギャザー部材。
[9]前記[1]~[6]のいずれかに記載のポリウレタン弾性繊維を含む、衛生材料。
本実施形態のポリウレタン弾性繊維は、マルチフィラメントである、ウレタン結合とウレア結合とを含むポリウレタン弾性繊維であって、該ウレタン結合に対する該ウレア結合の比率が0.05%以上5%以下であることを特徴とするポリウレタン弾性繊維である。
まず、以下の実施例で使用した評価方法について説明する。
<ポリウレタン弾性繊維の分子量及び多分散度(Mw/Mn)の測定>
LiBrを0.02mol/L含有するジメチルアセトアミド溶液にて、固形分濃度が0.25重量%になるようにポリウレタン弾性繊維を溶解し、測定サンプルとする。
作製したサンプルをShodex社製GPC-101にて、以下に示す条件で測定する。尚、ポリウレタン弾性繊維の分子量とは、Shodex社製のポリスチレン標準サンプル(SM-105)を全サンプル測定し、ピークトップ分子量から求めた検量線から算出された数平均分子量(Mn)と重量平均分子量(Mw)のことを指す。また、分子量の多分散度は、重量平均分子量を数平均分子量で除した(Mw/Mn)のことを指す。
[GPC測定条件]
カラム:(サンプル側)→KD-G→KD-806M→KD-806M→KD-802.5→KD-801×3→RI-71S(検出器)(以上は全てShodex社製)
カラムオーブン温度:60℃
流量:1.0ml/min
溶離液:LiBrを0.02mol/Lの濃度で含有するジメチルアセトアミド溶液
ポリウレタン弾性繊維を石油エーテルで洗浄して油剤を除去し、その後、クロロホルムを溶媒としてソックスレー抽出を5時間行い、有機化合物系添加剤を除去する。クロロホルムを-0.1MPaの真空下で80℃5時間乾燥除去し、ポリウレタン弾性繊維と内部標準のジメチルスルホキシドを所定量測り取って下記条件でNMRを測定し、前記ウレタン結合とウレア結合の特定と含有量の算出を行い、ウレア結合の含有量をウレタン結合の含有量で除することでウレタン結合に対するウレア結合の比率を算出した。前記ウレタン結合とウレア結合の含有量の算出は、内部標準であるジメチルスルホキシドとの水素シグナルの積分値より算出できる。例えば、ウレタン結合の含有量を算出する場合、ウレタン結合の水素の積分値とジメチルスルホキシドのメチル基の水素の積分値を比較して算出できる。また、ウレア結合の含有量を算出する場合、ウレア結合の水素の積分値とジメチルスルホキシドのメチル基の水素の積分値を比較して算出できる。一般的に、芳香族ウレタン結合の水素シグナルは9.2~9.8ppm、芳香族ウレア結合の水素シグナルは8.4~9.0ppm、脂肪族ウレタン結合の水素シグナルは6.7~7.3ppm、脂肪族ウレア結合の水素シグナルは6.0~6.7ppmに観測されることが多いが、この限りではない。
[NMR測定条件]
測定装置:JEOL社製 ECS400
測定核:1H
共鳴周波数:400MHz
積算回数:256回
測定温度:室温
溶媒:重水素化ジメチルホルムアミド
測定濃度:1.5重量%
化学シフト基準:ジメチルホルムアミド(8.0233ppm)
下記DMAc溶解試験で溶解し、かつ、下記NMR測定でアロファネート結合が確認できないポリウレタン弾性繊維を、本明細書中の用語「アロファネート結合を含む架橋を有しない」ものと判定した。下記DMAc溶解試験で溶解しない、又は、下記DMAc溶解試験で溶解するが下記NMR測定でアロファネート結合が確認できた、ポリウレタン弾性繊維を、「アロファネート結合を含む架橋を有するものと判定した。
<DMAc溶解試験>
ポリウレタン弾性繊維を0.2g精秤し、10gのDMAcに浸漬し、20℃で48時間攪拌をする。攪拌後、径1mm以上の塊状ポリマーが目視で確認できない場合、DMAcに溶解したと判定した。
<NMR測定(アロファネート結合の定性)>
-0.1MPaの真空下で80℃5時間乾燥したポリウレタン弾性繊維と内部標準のジメチルスルホキシドを所定量測り取って下記条件でNMRを測定した。この測定によって、ウレタン結合に対するアロファネート結合の比率を確認した。前記ウレタン結合に対するアロファネート結合の比率は、それぞれの水素の積分値を比較して算出でき、この比率が0.05%未満である場合に、アロファネート基が含まれていないと定義する。一般的に、アロファネート結合の水素シグナルは10.5~11.0ppmに観測されることが多いが、この限りではない。
[NMR測定条件]
測定装置:JEOL社製 ECS400
測定核:1H
共鳴周波数:400MHz
積算回数:256回
測定温度:室温
溶媒:重水素化ジメチルホルムアミド
測定濃度:1.5重量%
化学シフト基準:ジメチルホルムアミド(8.0233ppm)
巻糸体上のポリウレタン弾性繊維の伸長率(%)は、以下の手順で測定及び計算した。
・ポリウレタン弾性繊維巻糸体からポリウレタン弾性繊維を弛緩状態の長さ(以下、単に「リラックス長」ともいう。)で0.5m解舒してサンプルとし、そのサンプル重量(g)を測定した。以下の計算式から、ポリウレタン弾性繊維の弛緩状態における繊度(リラックス繊度A(dtex))を計算した。測定は4回行い、その平均値をとった。尚、「弛緩状態」とは、糸をチーズから解舒した後、無荷重で2時間以上放置した状態のことをいう。
リラックス繊度A(dtex)=サンプル重量(g)×10000/リラックス長(m)
・送り出しロールによってポリウレタン弾性繊維巻糸体からポリウレタン弾性繊維を、伸長率を維持した状態で50m送り出して解舒した。解舒された糸の重量(g)を測定した。以下の計算式から、ポリウレタン弾性繊維の伸長状態における繊度(プリント繊度B(dtex))を計算した。
プリント繊度B(dtex)=解舒された糸の総重量(g)×10000/50(m)
・以下の計算式:
伸長率(%)=(A/B-1)×100
から、巻糸体上のポリウレタン弾性繊維の伸長率(%)を計算した。
紙管からの巻厚が1cmになるまで剥ぎ取り、弾性繊維の巻糸体を、図1に示す装置にかけ、弾性繊維送り出しロール2を、速度50m/分、弾性繊維を3回巻きつけたプレドラフトロール3を、速度80m/分、巻き取りロール4を、速度85m/分の条件で走行させた。観察部位5での、弾性繊維の挙動を3分間目視観察し、以下の評価基準で、糸揺れを評価した。本評価において、糸揺れ幅が小さいほど、糸の使用時の摩擦抵抗が小さく糸切れ等が起こりにくい。
5:糸揺れ幅が0mm以上2mm未満
4:糸揺れ幅が2mm以上4mm未満
3:糸揺れ幅が4mm以上6mm未満
2:糸切れ幅が6mm以上又は糸切れ
1:糸切れ
尚、3分間の目視観察において、糸揺れ幅が上記評価基準の2基準の間を行き来する場合は、例えば「3~4」のように幅のある評価結果とした。
初期長7cmの試験糸を200%伸長して21cmとし、表面温度150℃の直径6cmの円筒状の熱体に押し当て(接触部分1cm)、切断されるまでの秒数を測定して、以下の5段階の評価基準で評価した:
5:切断されるまでの秒数が60秒以上であった。
4:切断されるまでの秒数が30秒以上60秒未満であった。
3:切断されるまでの秒数が10秒以上30秒未満であった。
2:切断されるまでの秒数が5秒以上10秒未満であった。
1:切断されるまでの秒数が5秒未満であった。
150℃で溶融したホットメルト接着剤(ヘンケルジャパン株式会社製765E)を、5本のポリウレタン弾性繊維を7mmの間隔をあけて平行に並べ、元の長さの2倍の長さになるように伸張し、Vスリットにて付着量が伸張された1本のポリウレタン弾性繊維あたり0.04g/mとなるよう連続的に塗工しながら、該ホットメルト接着剤が塗工されたポリウレタン弾性繊維を幅30cm、目付17g/m2の不織布(旭化成株式会社製エルタスガード(登録商標))2枚で連続的に挟み込み、その上から外径16cm幅40cmの1組のローラーにて、一方のローラーを0.5MPaのエア圧を供給したエアシリンダー(SMC株式会社製CQ2WB100-50DZ)にて押し込みながら連続的に圧着し、ギャザー部材を作製した。作製したギャザーを直ちに糸長方向に250mm~300mmの長さにカットし(この時のギャザー部材の長さを初期長とする)、糸長方向に初期長の2倍になるまで延伸させた状態でダンボール板に貼り付けた。次いで、貼り付けた試験体のポリウレタン弾性繊維の長さが200mmとなるような任意の2点に不織布の上から油性ペンで印をつける。こうすることで不織布越しにインクが浸み込みポリウレタン弾性繊維にインクで印をつけることができる。この印のところでポリウレタン弾性繊維とそこに接着している不織布ごとカットし、40℃で5時間放置した。5時間後、ポリウレタン弾性繊維の印をつけた2点間の長さを測定し、保持率を以下の式:
接着性保持率=100×(5時間後の計測長さmm)/200mm
により算出した。保持率が高いほど製品の製造時や着用時にてポリウレタン弾性繊維のスリップインが少ない。測定は同一サンプルあたり10回測定し、80%未満となる本数を用いて以下の評価基準に基づきスリップインの発生率とした:
5:接着性保持率を10回測定した際、80%未満となる本数が0本
4:接着性保持率を10回測定した際、80%未満となる本数が1本
3:接着性保持率を10回測定した際、80%未満となる本数が2本
2:接着性保持率を10回測定した際、80%未満となる本数が3本
1:接着性保持率を10回測定した際、80%未満となる本数が4本以上。
ポリウレタン弾性繊維を加工工程で使用した際の糸切れの頻度を以下の5段階の評価基準で評価した。
5:解舒性、耐熱性、接着性が全て評価5で、加工工程で糸切れが起こらない。
4:解舒性、耐熱性、接着性のいずれかに評価4があるが、評価3、2、1は見られない。加工工程で糸切れが起こらない。
3:解舒性、耐熱性、接着性のいずれかに評価3はあるが、評価2、1は見られない。加工工程で糸切れがほとんど起こらない。
2:解舒性、耐熱性、接着性のいずれかに評価2はあるが、評価1は見られない。加工工程で糸切れが稀に起こる。
1:解舒性、耐熱性、接着性のいずれかに評価1があり、加工工程で連続生産ができないほど糸切れが頻発する。
数平均分子量1800、GPCにおける多分散度(Mw/Mn)が1.2のポリテトラメチレンエーテルジオール2400gと、4,4’-ジフェニルメタンジイソシアネート750.75gとを、乾燥窒素雰囲気下、60℃で3時間、攪拌下で反応させて、末端イソシアネートでキャップされたポリウレタンプレポリマーを得た。このポリウレタンプレポリマーに、1,4-ブタンジオール150.95gを添加して、15分撹拌し、粘度2000ポイズ(30℃)のポリウレタンを得た。
その後、テフロン(登録商標)トレイに払い出し、このポリウレタンをトレイに入れたまま、110℃の熱風オーブン中で19時間アニーリングしてポリウレタン樹脂を得た。このポリウレタン樹脂は、GPCにおける重量平均分子量が20万、多分散度(Mw/Mn)が2.0で、ウレア結合は見られなかった。
紡口直下で噴射するスチームの温度を180℃にして溶融紡糸をした以外は、実施例1と同様の方法で620dtex/60フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は18万、多分散度(Mw/Mn)は2.0、ウレタン結合に対するウレア結合の比率は0.05%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は2.0%であった。
紡口直下で噴射するスチームの温度を190℃にして溶融紡糸をした以外は、実施例1と同様の方法で620dtex/60フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は18万、多分散度(Mw/Mn)は2.0、ウレタン結合に対するウレア結合の比率は0.1%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は2.0%であった。
紡口直下で噴射するスチームの範囲を紡口面から1cm~7cmにして溶融紡糸をした以外は、実施例1と同様の方法で620dtex/60フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は18万、多分散度(Mw/Mn)は2.0、ウレタン結合に対するウレア結合の比率は2.0%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は2.0%であった。
紡口直下で噴射するスチームの範囲を紡口面から1cm~10cmにして溶融紡糸をした以外は、実施例1と同様の方法で620dtex/60フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は18万、多分散度(Mw/Mn)は2.0、ウレタン結合に対するウレア結合の比率は3.0%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は2.0%であった。
紡口直下で噴射するスチームの範囲を紡口面から1cm~15cmにして溶融紡糸をした以外は、実施例1と同様の方法で620dtex/60フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は18万、多分散度(Mw/Mn)は2.0、ウレタン結合に対するウレア結合の比率は5.0%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は2.0%であった。
熱風オーブン中のアニーリング条件を80℃で24時間にしてポリウレタン樹脂を得た以外は、実施例1と同様の方法でポリウレタン弾性繊維を製造し、620dtex/60フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は12万、多分散度(Mw/Mn)は1.2、ウレタン結合に対するウレア結合の比率は0.5%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は2.0%であった。
熱風オーブン中のアニーリング条件を90℃で24時間にしてポリウレタン樹脂を得た以外は、実施例1と同様の方法でポリウレタン樹脂を製造し、620dtex/60フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は15万、多分散度(Mw/Mn)は1.5、ウレタン結合に対するウレア結合の比率は0.5%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は2.0%であった。
熱風オーブン中のアニーリング条件を130℃で12時間にしてポリウレタン樹脂を得た以外は、実施例1と同様の方法でポリウレタン樹脂を製造し、620dtex/60フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は20万、多分散度(Mw/Mn)は2.5、ウレタン結合に対するウレア結合の比率は0.5%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は2.0%であった。
熱風オーブン中のアニーリング条件を150℃で8時間にしてポリウレタン樹脂を得た以外は、実施例1と同様の方法でポリウレタン樹脂を製造し、620dtex/60フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は24万、多分散度(Mw/Mn)は3.0、ウレタン結合に対するウレア結合の比率は0.5%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は2.0%であった。
数平均分子量2000、GPCにおける多分散度(Mw/Mn)が1.5のポリテトラメチレンエーテルジオールを用いて、熱風オーブン中のアニーリング条件を150℃で8時間にしてポリウレタン樹脂を得た以外は、実施例1と同様の方法でポリウレタン樹脂を製造し、620dtex/60フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は28万、多分散度(Mw/Mn)は4.0、ウレタン結合に対するウレア結合の比率は0.5%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は2.0%であった。
数平均分子量2000、GPCにおける多分散度(Mw/Mn)が1.5のポリテトラメチレンエーテルジオールを用いて、熱風オーブン中のアニーリング条件を180℃で2時間にしてポリウレタン樹脂を得た以外は、実施例1と同様の方法でポリウレタン樹脂を製造し、620dtex/60フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は35万、多分散度(Mw/Mn)は5.0、ウレタン結合に対するウレア結合の比率は0.5%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は2.0%であった。
紙管に巻き取る際の1つ目のゴデローラーと最終の巻き取り速度の比(=最終巻き取り速度÷1つ目のゴデローラー速度)を1.01にした以外は、実施例1と同様の方法でポリウレタン樹脂を製造し、620dtex/60フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は18万、多分散度(Mw/Mn)は2.0、ウレタン結合に対するウレア結合の比率は0.5%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は0.05%であった。
紙管に巻き取る際の1つ目のゴデローラーと最終の巻き取り速度の比(=最終巻き取り速度÷1つ目のゴデローラー速度)を1.03にした以外は、実施例1と同様の方法でポリウレタン樹脂を製造し、620dtex/60フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は18万、多分散度(Mw/Mn)は2.0、ウレタン結合に対するウレア結合の比率は0.5%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は0.1%であった。
紙管に巻き取る際の1つ目のゴデローラーと最終の巻き取り速度の比(=最終巻き取り速度÷1つ目のゴデローラー速度)を1.10にした以外は、実施例1と同様の方法でポリウレタン樹脂を製造し、620dtex/60フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は18万、多分散度(Mw/Mn)は2.0、ウレタン結合に対するウレア結合の比率は0.5%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は1%であった。
紙管に巻き取る際の1つ目のゴデローラーと最終の巻き取り速度の比(=最終巻き取り速度÷1つ目のゴデローラー速度)を1.20にした以外は、実施例1と同様の方法でポリウレタン樹脂を製造し、620dtex/60フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は18万、多分散度(Mw/Mn)は2.0、ウレタン結合に対するウレア結合の比率は0.5%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は5%であった。
紙管に巻き取る際の1つ目のゴデローラーと最終の巻き取り速度の比(=最終巻き取り速度÷1つ目のゴデローラー速度)を1.30にした以外は、実施例1と同様の方法でポリウレタン樹脂を製造し、620dtex/60フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は18万、多分散度(Mw/Mn)は2.0、ウレタン結合に対するウレア結合の比率は0.5%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は10%であった。
紙管に巻き取る際の1つ目のゴデローラーと最終の巻き取り速度の比(=最終巻き取り速度÷1つ目のゴデローラー速度)を1.35にした以外は、実施例1と同様の方法でポリウレタン樹脂を製造し、620dtex/60フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は18万、多分散度(Mw/Mn)は2.0、ウレタン結合に対するウレア結合の比率は0.5%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は12%であった。
ポリウレタンを押出機内で溶融させた後、径0.23mm、30ホールのノズルから15.5g/分の速度で吐出させた以外は、実施例1と同様の方法でポリウレタン樹脂を製造し、310dtex/30フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は18万、多分散度(Mw/Mn)は2.0、ウレタン結合に対するウレア結合の比率は0.5%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は2%であった。
ポリウレタンを押出機内で溶融させた後、径0.23mm、90ホールのノズルから47g/分の速度で吐出させた以外は、実施例1と同様の方法でポリウレタン樹脂を製造し、940dtex/90フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は18万、多分散度(Mw/Mn)は2.0、ウレタン結合に対するウレア結合の比率は0.5%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は2%であった。
ポリウレタンを押出機内で溶融させた後、径0.23mm、120ホールのノズルから61g/分の速度で吐出させた以外は、実施例1と同様の方法でポリウレタン樹脂を製造し、1220dtex/120フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は18万、多分散度(Mw/Mn)は2.0、ウレタン結合に対するウレア結合の比率は0.5%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は2%であった。
ポリウレタンを押出機内で溶融させた後、径0.23mm、24ホールのノズルから吐出させた以外は、実施例1と同様の方法でポリウレタン樹脂を製造し、620dtex/24フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は18万、多分散度(Mw/Mn)は2.0、ウレタン結合に対するウレア結合の比率は0.5%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は2%であった。
ポリウレタンを押出機内で溶融させた後、径0.23mm、16ホールのノズルから吐出させた以外は、実施例1と同様の方法でポリウレタン樹脂を製造し、620dtex/16フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は18万、多分散度(Mw/Mn)は2.0、ウレタン結合に対するウレア結合の比率は0.5%で、アロファネート結合イソシアネート基を含む架橋はなく、巻糸体における伸長率は2%であった。
ポリウレタンを押出機内で溶融させた後、径0.23mm、12ホールのノズルから吐出させた以外は、実施例1と同様の方法でポリウレタン樹脂を製造し、620dtex/12フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は18万、多分散度(Mw/Mn)は2.0、ウレタン結合に対するウレア結合の比率は0.5%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は2%であった。
重合反応に使用した1,4-ブタンジオールの量を140.75gに変えた以外は、実施例1と同様の方法でポリウレタン樹脂を製造し、620dtex/60フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は18万、多分散度(Mw/Mn)は2.0、ウレタン結合に対するウレア結合の比率は0.5%で、巻糸体における伸長率は2.0%であった。このポリウレタン弾性繊維は、DMAcに溶解したが、NMRにおいてウレタン結合に対して0.3%のアロファネート結合があった。
紡口直下で噴射するスチームの温度を170℃にして溶融紡糸をした以外は、実施例1と同様の方法で620dtex/60フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は18万、多分散度(Mw/Mn)は2.0、ウレタン結合に対するウレア結合の比率は0.03%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は2.0%であった。
紡口直下で噴射するスチームの範囲を紡口面から1cm~20cmにして溶融紡糸をした以外は、実施例1と同様の方法で620dtex/60フィラメントのポリウレタン弾性繊維を得た。このポリウレタン弾性繊維のGPCにおける重量平均分子量は18万、多分散度(Mw/Mn)は2.0、ウレタン結合に対するウレア結合の比率は6.0%で、アロファネート結合を含む架橋はなく、巻糸体における伸長率は2.0%であった。
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Claims (9)
- マルチフィラメントである、ウレタン結合とウレア結合とを含むポリウレタン弾性繊維であって、該ウレタン結合に対する該ウレア結合の比率が0.05%以上5%以下であることを特徴とする、ポリウレタン弾性繊維。
- 多分散度(Mw/Mn)が1.2以上4.0以下である、請求項1に記載のポリウレタン弾性繊維。
- 単糸繊度が5dtex以上40dtex以下である、請求項1又は2に記載のポリウレタン弾性繊維。
- フィラメント数が15以上である、請求項1~3のいずれか1項に記載のポリウレタン弾性繊維。
- 熱可塑性である、請求項1~4のいずれか1項に記載のポリウレタン弾性繊維。
- アロファネート結合を含む架橋を有しない、請求項1~5のいずれか1項に記載のポリウレタン弾性繊維。
- 請求項1~6のいずれか1項に記載のポリウレタン弾性繊維を含む巻糸体において、該巻糸体上のポリウレタン弾性繊維の伸長率が0.05%以上10%以下である、ポリウレタン弾性繊維の巻糸体。
- 請求項1~6のいずれか1項に記載のポリウレタン弾性繊維を含む、ギャザー部材。
- 請求項1~6のいずれか1項に記載のポリウレタン弾性繊維を含む、衛生材料。
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| JP2022542843A JP7410307B2 (ja) | 2020-08-12 | 2021-08-06 | ポリウレタン弾性繊維及びその巻糸体、ギャザー部材、並びに衛生材料 |
| US18/019,227 US12529166B2 (en) | 2020-08-12 | 2021-08-06 | Polyurethane elastic fiber, winding body therefor, gather member and hygienic material |
| CN202180057117.1A CN116057217B (zh) | 2020-08-12 | 2021-08-06 | 聚氨酯弹性纤维及其卷装体、褶裥构件、以及卫生材料 |
| EP21855947.4A EP4198180A4 (en) | 2020-08-12 | 2021-08-06 | Polyurethane elastic fiber, winding body therefor, gather member, and sanitary material |
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| CN (1) | CN116057217B (ja) |
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| US20260049419A1 (en) * | 2024-08-13 | 2026-02-19 | North Carolina State University | Apparatus and method for improving yarn strength and hairiness in singles ring yarns |
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- 2021-08-06 EP EP21855947.4A patent/EP4198180A4/en active Pending
- 2021-08-06 WO PCT/JP2021/029432 patent/WO2022034868A1/ja not_active Ceased
- 2021-08-06 CN CN202180057117.1A patent/CN116057217B/zh active Active
- 2021-08-06 US US18/019,227 patent/US12529166B2/en active Active
- 2021-08-06 JP JP2022542843A patent/JP7410307B2/ja active Active
- 2021-08-12 TW TW110129724A patent/TWI777722B/zh active
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| JPWO2023286651A1 (ja) * | 2021-07-13 | 2023-01-19 | ||
| WO2023286651A1 (ja) * | 2021-07-13 | 2023-01-19 | 旭化成株式会社 | 熱可塑性ポリウレタン弾性繊維及びその巻糸体、該熱可塑性ポリウレタン弾性繊維を含むギャザー及び衛生材料、並びに該ポリウレタン弾性繊維の製造方法 |
| JP7583939B2 (ja) | 2021-07-13 | 2024-11-14 | 旭化成株式会社 | 熱可塑性ポリウレタン弾性繊維及びその巻糸体、該熱可塑性ポリウレタン弾性繊維を含むギャザー及び衛生材料、並びに該ポリウレタン弾性繊維の製造方法 |
Also Published As
| Publication number | Publication date |
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| CN116057217B (zh) | 2024-09-24 |
| CN116057217A (zh) | 2023-05-02 |
| JPWO2022034868A1 (ja) | 2022-02-17 |
| TWI777722B (zh) | 2022-09-11 |
| TW202221192A (zh) | 2022-06-01 |
| US20230287603A1 (en) | 2023-09-14 |
| EP4198180A1 (en) | 2023-06-21 |
| EP4198180A4 (en) | 2024-07-24 |
| JP7410307B2 (ja) | 2024-01-09 |
| US12529166B2 (en) | 2026-01-20 |
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