KR102826483B1 - Method for manufacturing functional fabric for youth and functional fabric manufactured thereby - Google Patents

Abstract

The present invention relates to a method for manufacturing functional fabric for youth and a functional fabric manufactured thereby.
According to one embodiment of the technical idea of the present invention, a method for manufacturing a functional fabric for youth includes a polypropylene yarn manufacturing step (S100) of manufacturing a polypropylene yarn using a polypropylene resin; a carbonized fiber manufacturing step (S200) of manufacturing a carbonized fiber; a mixed yarn manufacturing step (S300) of manufacturing a mixed yarn by mixing the polypropylene yarn and the carbonized fiber; a secondary coating step (S400) of forming a secondary coating layer by applying a secondary coating liquid composition to the mixed yarn and then drying it; and a fabric manufacturing step (S500) of manufacturing a fabric using the mixed yarn on which the secondary coating layer is formed.
The method for manufacturing a functional fabric for youth according to various embodiments of the technical idea of the present invention by the above-described configuration can manufacture a fabric that has good ventilation, allows air to circulate to the skin to prevent skin trouble, has excellent effects such as UV blocking properties, cooling properties, antibacterial properties, and deodorizing properties, and can be worn hygienically without an unpleasant odor.

Description

Method for manufacturing functional fabric for youth and functional fabric manufactured thereby {METHOD FOR MANUFACTURING FUNCTIONAL FABRIC FOR YOUTH AND FUNCTIONAL FABRIC MANUFACTURED THEREBY}

The present invention relates to a method for manufacturing functional fabric for youth and a functional fabric manufactured thereby, and more specifically, to a method for manufacturing functional fabric for youth which has excellent ventilation, allows air to circulate to the skin to prevent skin trouble, has excellent effects such as UV blocking, cooling, antibacterial, and deodorizing properties, and can be worn hygienically without an unpleasant odor, and a functional fabric manufactured thereby.

Clothing has developed as a medium for human expression along with human history, starting from practicality in responding to climate change, controlling the cold or protecting the body from external obstacles, and gradually adding decorativeness and sociality. Naturally, such changes and developments have been important factors in promoting the development of clothing both aesthetically and scientifically, and materials have been freely selected according to purpose, and the creation of more beautiful and functional clothing has continued.

Recently, clothing has been manufactured to be comfortable to move in, and the proportion of clothing is gradually increasing as the trend is to use it for multiple purposes, such as focusing on the functional aspect or pursuing decorative aspects.

In modern society, clothing not only needs to fit one's body type because it expresses one's inner self, individuality, and even social status, but it also needs to have various functions such as satisfying the desire for health as health issues such as the environment and stress become socially important.

Generally, clothes worn by people come into contact with the skin and are mainly made of cotton, a material that does not irritate the skin. In particular, clothes for teenagers and children are made of 100% cotton or cotton fabrics that contain almost 100% cotton so as not to cause any irritation to the delicate skin.

Fabric is the raw material for all clothing, and fabric is used to make clothes to be worn in spring, summer, fall, and winter. In particular, clothes worn by teenagers are easily soiled, and since they are in the growth period, a lot of secretions come out of their bodies, so they are easily contaminated and become a good habitat for bacteria, so there is a problem that they are not good for health.

In addition, adolescents in their growth period are free-spirited and like to run around and play outdoors, so they need to have clothing that is not only durable but also functional, such as UV protection, cooling, antibacterial, and hygienic.

Domestic registration patent No. 10-1394502 (registered on May 7, 2014) Domestic registration patent No. 10-2555247 (registered on July 10, 2023) Domestic registration patent No. 10-1384754 (registered on April 7, 2014)

The problem to be solved by the present invention is to provide a method for manufacturing a functional fabric for youth that has good ventilation, allows air to circulate to the skin to prevent skin trouble, has excellent effects such as UV protection, cooling, antibacterial and deodorizing properties, and can be worn hygienically without an unpleasant odor, and a functional fabric manufactured thereby.

The various problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

In one embodiment of the technical idea of the present invention, a method for manufacturing a functional fabric for youth is disclosed.

The method for manufacturing the functional fabric for youth includes a polypropylene yarn manufacturing step (S100) of manufacturing polypropylene yarn using a polypropylene resin; a carbonized fiber manufacturing step (S200) of manufacturing carbonized fiber; a mixed yarn manufacturing step (S300) of manufacturing a mixed yarn by mixing the polypropylene yarn and carbonized fiber; a secondary coating step (S400) of applying a secondary coating liquid composition to the mixed yarn and then drying it to form a secondary coating layer; and a fabric manufacturing step (S500) of manufacturing a fabric using the mixed yarn on which the secondary coating layer has been formed.

In the above secondary coating step (S400), the secondary coating liquid composition may include a weight ratio of 40 to 60 parts by weight of a biocellulose aqueous dispersion, 280 to 320 parts by weight of a polybutylene adipate terephthalate resin, 180 to 220 parts by weight of an ethylene-vinyl acetate copolymer (EVA), 1 to 3 parts by weight of a grapefruit seed extract, 1 to 10 parts by weight of a thermally conductive polymer, 3 to 7 parts by weight of titanium dioxide nanoparticles, 50 to 100 parts by weight of purified water, and 40 to 60 parts by weight of a curing agent.

In the above carbonized fiber manufacturing step (S200), the carbonized fiber is manufactured by preparing acrylic yarn, mixing carbon fiber into the acrylic yarn to manufacture a blended yarn, wherein the blended yarn is manufactured by mixing 10 to 20 parts by weight of carbon fiber with respect to 100 parts by weight of the total content of the acrylic yarn, applying a first coating composition to the blended yarn and drying it to form a first coating layer, wherein the first coating composition includes PLA (Polylactic Acid) resin, polybutylene adipate terephthalate resin, methylene diphenyl diisocyanate, activated carbon, illite powder, graphene, nanoceramic particles, a curing agent, and purified water, and carbonizing the blended yarn on which the first coating layer is formed in a carbonization chamber maintained at 1,000 to 2,000°C.

In the above carbon fiber manufacturing step (S200), the first coating liquid composition may include a weight ratio of 80 to 120 parts by weight of PLA (Polylactic Acid) resin, 10 to 20 parts by weight of polybutylene adipate terephthalate resin, 3 to 7 parts by weight of methylene diphenyl diisocyanate, 5 to 10 parts by weight of activated carbon, 1 to 5 parts by weight of illite powder, 1 to 3 parts by weight of graphene, 5 to 15 parts by weight of nanoceramic particles, 20 to 40 parts by weight of a curing agent, and 5 to 15 parts by weight of purified water.

In addition, another embodiment of the technical idea of the present invention discloses a method for manufacturing a functional fabric for youth manufactured by the above method.

Specific details of other embodiments are included in the detailed description.

The method for manufacturing a functional fabric for youth according to various embodiments of the technical idea of the present invention can manufacture a fabric that is well ventilated, allows air to circulate to the skin to prevent skin trouble, has excellent effects such as UV blocking properties, cooling properties, antibacterial properties, and deodorizing properties, and can be worn hygienically without an unpleasant odor.

It will be fully appreciated that various embodiments of the technical idea of the present invention can provide various effects not specifically mentioned.

FIG. 1 is a flow chart schematically explaining a method for manufacturing a functional fabric for youth according to one embodiment of the technical idea of the present invention.

The advantages and features of the present invention, and the method for achieving them, will become clear with reference to the embodiments described in detail below. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed content can be thorough and complete, and so that the spirit of the present invention can be sufficiently conveyed to those skilled in the art.

The terminology used in this application is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms defined in commonly used dictionaries, such as those defined in common dictionaries, should be interpreted as having a meaning consistent with the meaning they have in the context of the relevant art, and shall not be interpreted in an idealized or overly formal sense unless expressly defined in this application.

Hereinafter, with reference to the attached drawings, a preferred embodiment of a method for manufacturing a functional fabric for youth according to an embodiment of the technical idea of the present invention will be described in detail.

FIG. 1 is a flow chart schematically explaining a method for manufacturing a functional fabric for youth according to one embodiment of the technical idea of the present invention.

Referring to FIG. 1, a method for manufacturing a functional fabric for youth according to one embodiment of the technical idea of the present invention includes a polypropylene yarn manufacturing step (S100), a carbon fiber manufacturing step (S200), a mixed yarn manufacturing step (S300), a secondary coating step (S400), and a fabric manufacturing step (S500).

1. Polypropylene manufacturing step (S100)

The above polypropylene yarn manufacturing step (S100) is a step of manufacturing polypropylene yarn using polypropylene resin.

For example, the polypropylene yarn can be obtained through a process of melt-extruding a master batch containing 95 to 99 wt% of a polypropylene resin and 1 to 5 wt% of a pigment, then nozzle-spinning to obtain a plurality of unstretched yarns, cooling the spun unstretched yarns, and then supplying them to a plurality of stretching rollers for stretching.

The above extrusion can be performed at a pressure of 65 to 85 kg/cm ² , and the above spinning can be performed at a nozzle pressure of 130 to 170 kg/cm ² , a spinning temperature of 180 to 220° C., and a spinning speed of 2,500 to 3,500 m/min to obtain an undrawn yarn, and the above drawing can be drawing at a drawing ratio of 3 to 4.

The above polypropylene yarn can be obtained by mixing and melt-extruding resin chips and pigment chips obtained by melt-compounding polypropylene resin, and then nozzle-spinning the chips. The chips can be dried at 80 to 90° C. for 10 to 30 hours. The polypropylene resin can have a melt index of 13 to 17 g/10 min. The polypropylene resin can have a molecular weight of 100,000 to 200,000 g/mol.

In addition, the pigment may be one used in the manufacture of yarn in the relevant technical field, and its composition is a known technology, so a detailed description thereof will be omitted.

The above polypropylene yarn has a moisture content of about 0.01%, which is much lower than that of polyester with a moisture content of about 0.4%, nylon with a moisture content of about 4.5%, and cotton with a moisture content of about 8.0%. Therefore, it can provide excellent sweat absorption, quick-drying properties, and mold resistance, such as the characteristic of not retaining sweat and moisture but immediately discharging them. In addition, the polypropylene yarn generates little static electricity, does not produce toxins such as dioxin even when burned, has excellent chemical resistance and stain resistance to strong acidity, strong alkalinity, etc., and is an environmentally friendly material that causes little irritation to atopic skin.

2. Carbon fiber manufacturing step (S200)

The above carbon fiber manufacturing step (S200) is a step for manufacturing carbon fiber.

In the above carbon fiber manufacturing step (S200), carbon fiber manufactured by the following method can be used.

In order to manufacture the above carbon fiber, first, acrylic yarn can be prepared.

For example, the acrylic yarn can be prepared from a copolymer of 85 to 95 wt% of acrylonitrile, 6 to 10 wt% of vinyl acetate, and 0.1 to 1.0 wt% of sodium methacrylsulfonate. Alternatively, the acrylic yarn can be prepared from a copolymer comprising, but not limited to, acrylonitrile, methyl or ethyl, methacrylic acid, and sulfonic acid, and can be prepared by various methods known in the art.

The acrylic yarn can have high heat shrinkage stress, for example, the acrylic yarn can have a heat shrinkage stress of 0.1 to 0.3 g/d, a shrinkage ratio of 20 to 30%, and a high heat shrinkage ratio of 30 to 40%. In addition, the acrylic yarn can have a Young's modulus of 250 to 350 kg/mm ² and a strength of 35 to 45 g/d.

Next, carbon fiber can be mixed with the acrylic yarn to produce a mixed yarn.

For example, the above-mentioned mixed yarn can be mixed in a weight ratio of 10 to 20 parts by weight of carbon fiber per 100 parts by weight of the total content of the acrylic yarn, and by mixing carbon fiber into the acrylic yarn, the physical properties such as flame retardancy, durability, heat insulation, heat resistance, and insulation can be improved.

The above carbon fiber is one-fifth lighter than steel, but its strength is more than 10 times stronger. Accordingly, carbon fiber is used as a high-strength structural material in various industries such as aerospace, sports, automobiles, and bridges. Carbon fiber is beginning to receive full-scale attention as a next-generation material due to the rapid development and advancement of the automobile and aerospace industries, and demand is increasing especially in the automobile industry as it pursues eco-friendly, low-energy consumption future automobiles. In addition, in the automobile industry, as environmental regulations related to automobile exhaust fumes, which will become a problem in the future, as well as the demand for lighter automobiles, are increasing, the demand for carbon fiber-reinforced composites that can reduce the weight of automobiles while maintaining structural mechanical strength is rapidly increasing.

In general, carbon fibers are manufactured through an oxidation/stabilization process in which heat is applied in an oxidizing atmosphere to oxidize and stabilize precursor fibers to make them infusible, and a carbonization process in which the oxidized/stabilized fibers are carbonized at high temperatures. Subsequently, a graphitization process is also performed. At this time, precursor fibers of carbon fibers include polyacrylonitrile (PAN), pitch, rayon, lignin, and polyethylene. Among these, polyacrylonitrile (PAN) fibers are the optimal precursors for manufacturing high-performance carbon fibers compared to other precursors because they have a high carbon yield of over 50% and a high melting point. Accordingly, most carbon fibers currently are manufactured from polyacrylonitrile (PAN) fibers.

In the present invention, the carbon fiber can be purchased and used commercially, and the composition of the carbon fiber is a known technology, so a detailed description thereof will be omitted for convenience of explanation and clarity of the technical idea of the present invention.

Next, a first coating composition can be applied to the above-mentioned mixture and then dried to form a first coating layer.

By applying a first coating composition to the above-mentioned mixed solvent and drying it to form a first coating layer, properties such as flame retardancy, antibacterial properties, and durability can be enhanced. The first coating composition includes PLA (Polylactic Acid) resin, polybutylene adipate terephthalate resin (Polybutylene Adipate Terephthalate; PBAT), methylene diphenyl diisocyanate (MDI), activated carbon, illite powder, graphene, nanoceramic particles, a curing agent, and purified water.

Specifically, the first coating liquid composition may contain a weight ratio of 80 to 120 parts by weight of PLA (polylactic acid) resin, 10 to 20 parts by weight of polybutylene adipate terephthalate (PBAT) resin, 3 to 7 parts by weight of methylene diphenyl diisocyanate (MDI), 5 to 10 parts by weight of activated carbon, 1 to 5 parts by weight of illite powder, 1 to 3 parts by weight of graphene, 5 to 15 parts by weight of nanoceramic particles, 20 to 40 parts by weight of a curing agent, and 5 to 15 parts by weight of purified water.

The above PLA (Polylactic Acid) resin is a thermoplastic polyester of lactide or lactic acid, and can be manufactured by polymerizing lactic acid produced by fermenting starch extracted from corn, potatoes, etc., for example. The PLA resin emits significantly less environmentally hazardous substances such as _CO2 during the use or disposal process than petroleum-based materials such as polyvinyl chloride (PVC), and has environmentally friendly characteristics in that it can be easily decomposed in the natural environment when disposed of.

The above polybutylene adipate terephthalate (PBAT) resin is a biodegradable bioplastic and is an environmentally friendly material that is 100% decomposed in the ground within 6 months. The PBAT resin can be obtained by condensation polymerization of 1,4-butanediol, adipic acid, and terephthalic acid according to a generally known method.

These PBAT resins can be synthesized directly using the general method, or can be used as commercially available resins, for example, commercially available PBAT resins such as the above-mentioned product names ECOPLEX (BASF) or PBG7070 (Samsung Fine Chemicals).

In addition, the PBAT resin may have a weight average molecular weight of 150,000 to 400,000. As the PBAT resin has this molecular weight range, the compatibility and processability with other compositions constituting the PBAT resin and the coating composition may be improved, and the PBAT resin may exhibit improved physical properties, etc. due to the relatively high molecular weight.

The above methylene diphenyl diisocyanate (MDI) has excellent chemical properties such as water resistance, chemical resistance, and salt water resistance, and mechanical properties such as wear resistance and impact resistance, and can have excellent adhesion and waterproof properties.

The above activated carbon is a carbon aggregate with developed micropores, which can change the internal surface area through an activation process, and has excellent absorbency and adsorptivity properties in which adsorption occurs with surrounding liquid or gas through the carbon atom functional groups inside.

The above activated carbon can adsorb and remove harmful substances or gases and absorb fine moisture, and furthermore, the activated carbon can be used in powder form. Such powder-form activated carbon not only enhances the adsorption capacity of the porous activated carbon itself, but also, the finer the activated carbon powder, the denser the space between particles, thus enhancing the adhesive force and imparting the functions of oxidation prevention and hydrophobicity.

The above activated carbon has a strong power to expel toxins from the body, so it is excellent for various adult diseases and dermatitis allergy symptoms caused by accumulation of toxins in the body. For example, the activated carbon can be used having a hardness of 90 mass fraction% or more, a filling density of 0.47 to 0.55 g/ml, a specific surface area of 1,050 to 1,150 ^m2 /g, a pore distribution of 3Å to 10Å in pore diameter, an iodine adsorption power of 1,000 mg/g or more, a pore volume of 0.5 to 0.6 ml/g, a pH of 10 to 11, a phenol adsorption power of 18 to 23 ml/g, and an M·B decolorization power of 150 to 200 ml/g.

The above illite powder can be manufactured by crushing and pulverizing illite. The illite is a representative natural clay mineral, defined as a porous mica mineral, and has a thin plate (sheel) structure, has bendability and elasticity, and thus has properties such as elasticity and absorbency that are superior to those of other minerals.

The main components of the above illite mineral are 57.5% silicon oxide (SiO ₂ ) that removes waste matter and sebum in pores, 23.3% aluminum oxide (Al ₂ O ₃ ) that promotes blood circulation, 6.76% iron oxide (Fe ₂ O ₃ ) that binds collagen, 0.1% calcium oxide (C ₂ O) that has detoxification, stress suppression and relief, 1.21% sodium oxide (Na ₂ O) that provides osmotic pressure control and moisture regulation, 0.38% magnesium oxide (MgO), 6.43% potassium oxide (K ₂ O), and 4.32% titanium dioxide (TiO ₂ ), MnO, Li, Cr, Zn, Sr, etc.

In addition, the main functions of the above illite include adsorbing suspended substances in water, and since it has a negative ion, it induces coagulation and precipitation through electrical neutralization with suspended positive ion particles, so it has an excellent water purification function, adsorption/decomposition ability for specific radioactive substances, adsorption, deodorization and decomposition of various heavy metals and toxic gases in water/soil/air, activation of cells, enhancement of immunity, emission of a large amount of dissolved oxygen in water, activation of water molecules, generation of a large amount of negative ions from illite itself, radiation of 93% of far infrared rays at 40℃, bactericidal action against viruses/bacteria/fungi, adsorption and decomposition of various heavy metals/organic substances/toxic substances on the skin, and it is known to have excellent elasticity and adhesion as it does not clump up.

The above graphene is the most outstanding material among existing materials in terms of strength, thermal conductivity, electron mobility, deodorizing properties, and antibacterial properties. Accordingly, it is applied to various fields such as displays, secondary batteries, solar cells, automobiles, and lighting, and is recognized as a strategic core material that will drive the growth of related industries, so technology for commercializing graphene is receiving much attention.

That is, graphene is a two-dimensional carbon isotrope in which carbon atoms form a hexagonal honeycomb lattice structure with ^sp2 hybridization, and the thickness of a single layer of graphene is 0.2 to 0.3 nm, which is the thickness of one carbon atom. Graphene has high electrical conductivity and specific surface area, so it is used in various fields such as electrodes for supercapacitors, sensors, batteries, actuators (electrode active materials), touch panels, flexible displays, high-efficiency solar cells, heat-dissipating films, coating materials, seawater desalination filters, electrodes for secondary batteries, and ultra-fast chargers.

The above nanoceramic particles can improve properties such as wear resistance and scratch resistance. For example, the above nanoceramic particles may be nanoceramic particles having an average particle diameter of 500 to 1,500 nm, and at least one selected from the group consisting of silicon carbide, alumina, and silica may be used.

The above curing agent can perform a role of promoting curing of the coating composition. For example, the curing agent can use at least one selected from the group consisting of glycerin, p-toluenesulfonic acid monohydrate (PTSA), morpholine, ammonium chloride, ammonium sulfate, and phthalic anhydride.

The above purified water is used to uniformly mix and dissolve the coating liquid composition, and enables the coating liquid composition to have an appropriate formulation, viscosity, hardness, etc.

Next, the mixed yarn on which the first coating layer has been formed can be carbonized to produce carbonized fibers.

The above carbonization can be carried out in a carbonization chamber maintained at 1,000 to 2,000°C with the mixed sand having the first coating layer formed thereon, and gases such as nitrogen or hydrogen discharged during the carbonization process can be discharged by a vacuum pump.

The above carbonization can be achieved by winding the mixed yarn on which the first coating layer has been formed around a roller and adjusting the tension of another roller so that the mixed yarn on which the first coating layer has been formed passes through a carbonization chamber.

In addition, the carbonization may be performed in multiple stages, and preliminary firing may be performed first based on the softening point of the mixed sand on which the first coating layer is formed. Since the composition for manufacturing the carbonized fiber is a known technology, a detailed description thereof will be omitted for convenience of explanation and clarity of the technical idea of the present invention.

3. Mixed-material manufacturing step (S300)

The above mixed yarn manufacturing step (S300) is a step of manufacturing a mixed yarn by mixing the polypropylene yarn and carbon fiber.

In the above mixed yarn manufacturing step (S300), the polypropylene yarn and carbon fiber can be mixed at a weight ratio of 1:1 to manufacture the mixed yarn.

4. Second coating stage (S400)

The above-mentioned second coating step (S400) is a step of forming a second coating layer by applying a second coating solution composition to the above-mentioned mixed sand and then drying it.

In the above secondary coating step (S400), the secondary coating layer can reduce the easy attachment of fine dust, etc., and provide effects such as antibacterial properties and deodorizing properties. For example, the secondary coating liquid composition includes a biocellulose aqueous dispersion, a polybutylene adipate terephthalate resin, an ethylene-vinyl acetate copolymer (EVA), grapefruit seed extract, a thermally conductive polymer, titanium dioxide nanoparticles, purified water, and a curing agent.

Specifically, the secondary coating liquid composition may contain a weight ratio of 40 to 60 parts by weight of the biocellulose aqueous dispersion, 280 to 320 parts by weight of polybutylene adipate terephthalate resin, 180 to 220 parts by weight of ethylene-vinyl acetate copolymer (EVA), 1 to 3 parts by weight of grapefruit seed extract, 1 to 10 parts by weight of a thermally conductive polymer, 3 to 7 parts by weight of titanium dioxide nanoparticles, 50 to 100 parts by weight of purified water, and 40 to 60 parts by weight of a curing agent.

The above biocellulose aqueous dispersion can reduce the attachment of fine dust to fabric by repelling the negative charge of the biocellulose aqueous dispersion with the negative charge of fine dust. The above biocellulose aqueous dispersion can be manufactured by including biocellulose microfibers.

The above fine dust refers to particulate matter having a diameter of 10㎛ or less, and may include ultrafine dust having a diameter of 2.5㎛ or less, and the biocellulose refers to bacterial cellulose that directly synthesizes cellulose microfibers through bacterial culture. It is distinguished from cellulose derived from various types of wood, powdered cellulose obtained by pulverizing these using a high-pressure homogenizer or mill, or microcrystalline cellulose powder obtained by refining these through chemical treatment such as acid hydrolysis, and cellulose derived from plants such as kenaf, hemp, rice, bacchus, and bamboo.

The bacteria include, for example, Acetobacter, Rhizibium, and Agrobacterium, and when cultured in a medium containing nutrients for bacterial culture, bacterial cellulose is formed at the interface of the culture solution. Culturing methods include static cultivation and agitated cultivation. The static cultivation method is a method in which bacteria are first transplanted into a medium and then left in a flask on a shelf or the like for about 10 days to be cultured. Another method, the agitated cultivation method, is a method in which bacteria are continuously stirred at a constant speed in a shaking incubator using a liquid medium and cultured. Instead of culturing the bacteria, commercially distributed biocellulose can be purchased and used. Biocellulose has a three-dimensional network, a high crystallinity (84-89%), and sufficient pores. The length of biocellulose is several to several tens of micrometers, and it has a diameter of a constant, that is, a uniform length distribution.

For example, the biocellulose aqueous dispersion may be a biocellulose aqueous dispersion manufactured by the following method.

That is, in order to manufacture the above biocellulose aqueous dispersion, first, biocellulose (Easycostec, Mitagon Park Dan), sodium hypochlorite, and 2,2,6,6-tetramethyl-1-piperidine-N-oxy radical (hereinafter, TEMPO) catalyst can be prepared.

Next, after dissolving 10 mg of TEMPO catalyst in 100 g of distilled water, 5 g of biocellulose sheet is added, 8 g of sodium hypochlorite is added, and the mixture is stirred for 20 hours while maintaining the pH at 12 at room temperature, so that the biocellulose sheet can be manufactured in the form of microfibers dispersed in water.

Next, the manufactured aqueous biocellulose microfiber dispersion was prepared through purification and washing processes, and then stored at 25°C to prepare an aqueous biocellulose dispersion.

At this time, the biocellulose aqueous dispersion contains microfibers, and the microfibers may have a diameter of 50 to 150 nm.

The above polybutylene adipate terephthalate (PBAT) resin is a biodegradable bioplastic and is an environmentally friendly material that is 100% decomposed in the ground within 6 months. The PBAT resin can be obtained by condensation polymerization of 1,4-butanediol, adipic acid, and terephthalic acid according to a generally known method.

These PBAT resins can be synthesized directly using the general method, or can be used as commercially available resins, for example, commercially available PBAT resins such as the above-mentioned product names ECOPLEX (BASF) or PBG7070 (Samsung Fine Chemicals).

In addition, the PBAT resin may have a weight average molecular weight of 150,000 to 400,000. As the PBAT resin has this molecular weight range, the compatibility and processability with other materials such as the PBAT resin and polysiloxane, PMMA resin composition, etc. may be improved, and the PBAT resin may exhibit improved physical properties, etc. due to the relatively high molecular weight.

The above ethylene-vinyl acetate copolymer (EVA) is a polymer obtained by copolymerizing ethylene and vinyl acetate monomers, and refers to a high molecular weight resin commonly referred to as EVA. When the content of vinyl acetate monomer is low, it has excellent properties such as impact resistance and stress cracking resistance like ordinary low-density polyethylene, and when the content of vinyl acetate is high, it has improved adhesiveness, so it can be used as a raw material for adhesives or hot melts.

The above ethylene-vinyl acetate copolymer (EVA) is a copolymer resin of ethylene and vinyl acetate, and has excellent properties such as transparency, flexibility, and low-temperature brittleness, while also being a very environmentally friendly resin. For example, it is preferable to use the ethylene-vinyl acetate copolymer having a melting index of 400, a vinyl acetate content of 28%, and a glass transition temperature of -28.6°C.

The above grapefruit seed extract can be manufactured by extracting grapefruit seeds, and the grapefruit seeds contain ascorbic acid, sterol, dehydroascorbic acid, tocopherol, palmitic acid, etc. as main components, and various effective components are known to inhibit the growth of microorganisms by weakening the enzyme activity and permeability related to the cell membrane of microorganisms and inhibiting cellular respiration.

In particular, the grapefruit seeds contain bioflavonoids, naringin and citral, as their main components, so they not only have excellent antibacterial and antioxidant effects, but also have excellent antibacterial effects against gram-positive and gram-negative bacteria as well as fungi.

The above thermally conductive polymer is added to improve thermal conductivity, and the thermally conductive polymer can be manufactured by including 44 wt% of a polycarbonate-based resin, 41 wt% of a polyolefin-based resin, and 15 wt% of a carbon-based thermally conductive filler. The polycarbonate-based resin can be a polycarbonate-based resin based on bisphenol-A, and the polyolefin-based resin can be at least one selected from the group consisting of ethylene octene rubber (EOR), ethylene propylene rubber (EPR), ethylene-propylene-diene rubber (EPDM), and linear low-density polyethylene (LLDPE), and the carbon-based thermally conductive filler can be graphite.

The above titanium dioxide nanoparticles can be used as an ultraviolet ray blocking material and can have a particle size of 10 to 1000 nm.

The above titanium dioxide has a high absorption rate of ultraviolet rays and good reflection of infrared rays, so it blocks not only ultraviolet rays but also infrared rays, and it scatters and blocks ultraviolet rays. It has the advantage of not causing side effects on the skin and not being decomposed by ultraviolet rays, and is widely used as a photocatalyst that decomposes organic substances.

The purified water may be included to disperse and dissolve the compositions constituting the coating liquid.

The above-mentioned hardener may be at least one selected from the group consisting of glycerin, p-toluenesulfonic acid monohydrate (PTSA), morpholine, ammonium chloride, ammonium sulfate, and phthalic anhydride.

5. Fabric manufacturing stage (S500)

The above fabric manufacturing step (S600) is a step of manufacturing a fabric using a mixed yarn on which the second coating layer has been formed.

In the fabric manufacturing step (S500) above, the fabric can be manufactured by weaving the mixed yarns on which the second coating layer is formed in a cross shape in the horizontal and vertical directions. For example, the fabric can be manufactured by weaving the mixed yarns on which the second coating layer is formed by arranging the mixed yarns adjacent to each other at equal intervals or by twisting and weaving the mixed yarns.

In the above fabric manufacturing step (S500), the fabric is woven using warp yarns and weft yarns. This is a known technology in the relevant technical field, so a detailed description thereof will be omitted for clarity and convenience of explanation.

Hereinafter, with reference to the attached drawings, a method for manufacturing a functional fabric for youth according to an embodiment of the technical idea of the present invention will be described in more detail.

< Example >

First, polypropylene yarn was manufactured using polypropylene resin.

At this time, the polypropylene yarn was manufactured through a process of melting and extruding a master batch containing 97 wt% of polypropylene resin and 3 wt% of pigment, then nozzle-spinning to obtain a plurality of undrawn yarns, cooling the spun undrawn yarns, and then supplying them to a plurality of drawing rollers for drawing. The extrusion was performed at a pressure of 75 kg/cm ² , and the spinning was performed at a nozzle pressure of 150 kg/cm ² , a spinning temperature of 200° C., and a spinning speed of 3,000 m/min to obtain undrawn yarns, and the drawing was performed at a draw ratio of 3.5.

Next, acrylic yarn was prepared, and 15 parts by weight of carbon fiber was mixed in a weight ratio of 100 parts by weight of the total acrylic yarn content to produce a blended yarn.

Next, a first coating solution composition was applied to the above-described mixed resin and dried to form a first coating layer. The first coating solution composition contained a weight ratio of 100 parts by weight of PLA (polylactic acid) resin, 15 parts by weight of polybutylene adipate terephthalate resin (PBAT), 5 parts by weight of methylene diphenyl diisocyanate (MDI), 8 parts by weight of activated carbon, 3 parts by weight of illite powder, 2 parts by weight of graphene, 10 parts by weight of nanoceramic particles, 30 parts by weight of a curing agent, and 10 parts by weight of purified water.

Next, the mixed sand having the first coating layer formed thereon was carbonized in a carbonization chamber maintained at 1,500°C to produce carbonized fibers.

Next, the polypropylene yarn and carbon fiber were mixed in a weight ratio of 1:1 to produce a mixed yarn, and a secondary coating composition was applied to the mixed yarn and then dried to form a secondary coating layer.

At this time, the secondary coating composition contained 50 parts by weight of biocellulose aqueous dispersion, 300 parts by weight of polybutylene adipate terephthalate resin, 200 parts by weight of ethylene-vinyl acetate copolymer (EVA), 2 parts by weight of grapefruit seed extract, 5 parts by weight of thermally conductive polymer, 5 parts by weight of titanium dioxide nanoparticles, 80 parts by weight of purified water, and 50 parts by weight of a curing agent.

Next, a fabric was manufactured using the mixed yarn on which the second coating layer was formed.

< Comparative example >

A fabric woven with polyester yarn was prepared and used as a fabric for comparative examples.

1. Measurement of UV protection rate

The ultraviolet ray blocking rate of the fabrics of the above examples and comparative examples was measured using the KS K 0850:2014 test method, and the results are shown in [Table 1] below.

Measuring instrument: UV-VIS-NIR Spectrophotometer (Lambda 1050, PerkinElmer, USA)

Wavelength range: UV-R (290~400 nm) / UV-A (315~400 nm) / UV-B (290~315 nm)

Wavelength interval: 5㎚

division UV-R UV-A UV-B Example 86.9% 86.5% 87.2% Comparative example 51.3% 52.4% 51.8%

Referring to the above [Table 1], it can be confirmed that the fabric manufactured as in the comparative example had UV-R, UV-A, and UV-B ultraviolet ray blocking rates of 51.3%, 52.4%, and 51.8%, respectively, while the fabric manufactured as in the example had UV-R, UV-A, and UV-B ultraviolet ray blocking rates of 86.9%, 86.5%, and 87.2%, respectively, demonstrating an excellent ultraviolet ray blocking effect.

2. Sensory evaluation

A sensory evaluation was conducted on the surface texture, dust contamination, and preference of the fabrics according to examples and comparative examples, and the results are shown in [Table 3] below.

The sensory test was conducted on 50 clothing-related producers and general consumers, and the scores and evaluation criteria were scored using a 9-point scoring system, as shown in [Table 2] below.

score metewand 9 Very good 7 well 5 commonly 3 Bad 1 Very bad

division Surface texture Dust contamination Overall preference Example 8.3 8.4 8.3 Comparative example 5.4 5.5 5.5

Referring to the above [Table 3], it can be confirmed that the fabric manufactured according to the example is superior in surface texture, dust contamination, and overall preference compared to the fabric according to the comparative example.

3. Antibacterial test

Fabric specimens (50×50 mm) manufactured according to the above examples and comparative examples were prepared, and the antibacterial activity was investigated using the paper disk method against cultures of Bacillus subtilis, Escherichia coli, and Salmonella typhimurium. The results are presented in [Table 4] below.

division Antibacterial activity (antibacterial ring of paper disc, diameter mm) Bacillus Escherichia coli Salmonella Example 11.6 12.2 12.4 Comparative example 4.4 4.2 3.9

Referring to the above [Table 4], it can be confirmed that the fabric manufactured according to the example has excellent antibacterial activity against Bacillus, Escherichia coli, and Salmonella.

4. Deodorization test

An ammonia odor source having the concentration described below was placed in a 300 cc Erlenmeyer flask, fabrics manufactured according to the above examples and comparative examples were cut, 20 g of fabric specimens were placed each, 5 cc of test liquid was added to each specimen, the specimens were sealed, and left to stand. Thereafter, the concentration of the odor source was measured at regular time intervals.

For the ammonia deodorization test, 28% ammonia water was diluted in 4 times the volume of water to prepare a diluted solution, and 0.15 cc of the diluted solution was added to make the ammonia concentration 160 ppm to perform a deodorization test, and the results are shown in [Table 5] below.

Ammonia deodorization test (unit: ppm) division Example Comparative example 3 minutes later 92 151 5 minutes later 76 146 10 minutes later 60 140 30 minutes later 44 135 60 minutes later 29 128

Referring to the above [Table 5], it was confirmed that the functional fabric according to the example exhibited an excellent deodorizing effect.

5. Investigation of the content of volatile organic compounds (VOCs)

The content of volatile organic compounds (VOCs) in the fabric manufactured according to the above example was investigated, and the results are shown in [Table 6] below. The test conditions are as follows.

Test conditions and notes

1. Sample preparation: Fabric specimen (5 cm × 5 cm)

2. Sample pretreatment: 2 hours, 65℃

3. Sample processing

3.1 Tedler Bag Size: 3L

3.2 Nitrogen injection amount: 3L

3.3 Adsorbent: Tenax TA (VOCs), DNPH catridge (Aldehyde)

3.4 Sample collection volume

3.4.1 Aldehyde: 1.5L 3.4.2 VOCs: 1L

4. Analysis conditions (VOCs)

4.1 ATD (Turbomatrix manufactured by Perkin Elmer, USA)

4.1.1 Tube desorption temperature: 280℃ 4.1.2 Desorption time: 15 minutes

4.1.3 Desorption maximum temperature: 280℃ 4.1.4 Desorption minimum temperature: -30℃

4.2 GC/MS

4.2.1 Mobile Gas: Helium

4.2.2 Column temperature: 40℃(2 min)→7℃/min→220℃(25 min)→7℃/min→280℃(5 min)

4.2.3 Column: HP-1, 60m × 0.32mm

5. Analysis conditions (Aldehyde)

5.1 HPLC

5.1.1 Column: C18 (150mm × 4.6mm ID) 5.1.2 Column temperature: 40℃

5.1.3 Mobile phase: A: Water/THF(8:2,V:V), B: Acetonitrile

5.1.4 Gradient elution: 0→25min, B 20→60%, 25→40min, B 20% Hold

5.1.5 Flow rate: 1.5 mL/min 5.1.6 Measurement wavelength: 360 nm 5.1.7 Injection volume: 20 μL

< Content of volatile organic compounds; Unit: ㎍/㎥ >

division Example Benzene less than 10 Toluene less than 10 Xylene less than 10 Formaldehyde less than 10

Referring to the above [Table 6], it can be seen that the fabric according to the example has a content of Benzene, Toluene, Xylene, and Formaldehyde of less than 10㎍/㎥. As shown in the above [Table 6], it can be seen that the fabric according to the example is environmentally friendly as it does not contain any hazardous substances.

6. Measurement of coldness

A cooling sensation evaluation test was performed using the fabric according to the above examples and comparative examples.

Experimental conditions: The cooling sensation evaluation experiment was performed in the following order.

1) Laboratory temperature: (20±1)℃

2) The temperature of the fabrics according to the examples and comparative examples was stabilized in the laboratory so that they were the same.

3) A 500W light bulb (fluorescent light) was turned on at a distance of 25 cm from the fabric to induce cooling sensation in the fabric according to the examples and comparative examples.

4) The total time was 60 minutes, and filming was done at 10-minute intervals.

5) The surface temperature of the fabric according to the examples and comparative examples was measured using a thermal imaging camera.

Surface temperature of the fabric (℃) Time (minutes) Example Comparative example 0 20.5 20.5 10 20.8 23.1 20 21.3 25.5 30 20.0 29.4 40 22.5 33.1 50 23.1 34.5 60 23.3 37.9

Referring to the above [Table 7], it was confirmed that the surface temperature of the fabric according to the example did not change compared to the fabric manufactured according to the comparative example.

Above, a preferred embodiment of the present invention has been described with reference to the attached drawings, but it will be understood by those skilled in the art to which the present invention pertains that the present invention may be implemented in other specific forms without changing the technical idea or essential features thereof. Therefore, it should be understood that the above-described embodiment is exemplary in all respects and not restrictive.

Claims (4)

A polypropylene yarn manufacturing step (S100) for manufacturing polypropylene yarn using polypropylene resin;
A carbon fiber manufacturing step (S200) for manufacturing carbon fiber;
A mixed yarn manufacturing step (S300) of manufacturing a mixed yarn by mixing the above polypropylene and carbon fiber;
A second coating step (S400) of applying a second coating composition to the above mixture and drying it to form a second coating layer; and
It includes a fabric manufacturing step (S500) for manufacturing a fabric using a mixed yarn on which the above-mentioned second coating layer is formed,
In the carbon fiber manufacturing step (S200), the carbon fiber is manufactured by preparing acrylic yarn and mixing carbon fiber into the acrylic yarn to manufacture a blended yarn, wherein the blended yarn is manufactured by mixing 10 to 20 parts by weight of carbon fiber with respect to 100 parts by weight of the total content of the acrylic yarn, applying a first coating composition to the blended yarn and drying it to form a first coating layer, wherein the first coating composition is manufactured by mixing 100 parts by weight of PLA (Polylactic Acid) resin, 15 parts by weight of polybutylene adipate terephthalate resin (PBAT), 5 parts by weight of methylene diphenyl diisocyanate (MDI), 8 parts by weight of activated carbon, 3 parts by weight of illite powder, 2 parts by weight of graphene, 10 parts by weight of nanoceramic particles, 30 parts by weight of hardener, and 10 parts by weight of purified water. Included is the activated carbon having a hardness of 90 mass fraction% or more, a packing density of 0.47 to 0.55 g/ml, a specific surface area of 1,050 to 1,150 ^m2 /g, a pore distribution having a pore diameter of 3 Å to 10 Å, an iodine adsorption capacity of 1,000 mg/g or more, a pore volume of 0.5 to 0.6 ml/g, a pH of 10 to 11, a phenol adsorption capacity of 18 to 23 ml/g, and an M·B decolorization capacity of 150 to 200 ml/g, and the nanoceramic particles having an average particle diameter of 500 to 1,500 nm are used, and at least one selected from the group consisting of silicon carbide, alumina, and silica is used, and the mixed sand having the first coating layer formed is carbonized in a carbonization chamber maintained at 1,000 to 2,000°C. Carbon fiber is used,
In the above second coating step (S400), the second coating liquid composition contains 50 parts by weight of biocellulose aqueous dispersion, 300 parts by weight of polybutylene adipate terephthalate resin, 200 parts by weight of ethylene-vinyl acetate copolymer (EVA), 2 parts by weight of grapefruit seed extract, 5 parts by weight of thermally conductive polymer, 5 parts by weight of titanium dioxide nanoparticles, 80 parts by weight of purified water, and 50 parts by weight of a curing agent in a weight ratio.
The above biocellulose dispersion is a method for manufacturing a functional fabric for youth, comprising: preparing biocellulose, sodium hypochlorite, and a 2,2,6,6-tetramethyl-1-piperidine-N-oxy radical catalyst; dissolving 10 mg of the 2,2,6,6-tetramethyl-1-piperidine-N-oxy radical catalyst in 100 g of distilled water; adding 5 g of a biocellulose sheet; adding 8 g of sodium hypochlorite; and stirring for 20 hours while maintaining the pH at 12 at room temperature, thereby manufacturing a biocellulose sheet in the form of microfibers dispersed in water; and using the manufactured biocellulose dispersion in the form of microfibers dispersed in water after purifying and washing the manufactured biocellulose microfiber dispersion and storing it at a temperature of 25°C; and the biocellulose dispersion includes microfibers, wherein the microfibers have a diameter of 50 to 150 nm. delete delete delete