KR20230172087A - Multi-functional outdoor fabrics and manufacturing method thereof - Google Patents

Abstract

The present invention relates to multifunctional outdoor fabric capable of preventing abrasion resistance and static electricity generation to be suitable for use in various outdoor environments by laminating a functional layer including graphene oxide nanofillers and aramid nanofibers on the fabric, and to a method for manufacturing the same.

Description

Multi-functional outdoor fabrics and manufacturing method thereof {Multi-functional outdoor fabrics and manufacturing method thereof }

The present invention relates to a multifunctional outdoor fabric and a method of manufacturing the same. It is manufactured by combining a functional layer containing graphene oxide nanofiller and aramid nanofiber with the fabric, and has abrasion resistance and wear resistance suitable for use in various outdoor environments. It relates to a multi-functional outdoor fabric with functionality such as preventing the generation of static electricity and a method of manufacturing the same.

Recently, as interest in wellness culture has increased around the world, outdoor activities have become popular and demand for outdoor activities has increased. Outdoor clothing is gaining great popularity among consumers as the latest trend in all sports and leisure activities. , demand in that market is increasing dramatically.

Materials to be applied to such outdoor clothing require a lot of functionality. In particular, they require moisture permeability, waterproofing, lightweighting, thinness, and stretchability for convenience during sports and leisure activities.

In general, moisture-permeable waterproof fabric refers to a fabric that has the characteristic of allowing water in the form of vapor to pass through and not allowing water in the liquid state to pass through. These moisture-permeable and waterproof fabrics are mainly used in outdoor clothing such as mountaineering clothing or ski clothing. Clothing using the moisture-permeable waterproof fabric discharges sweat in the form of water vapor generated from physical activity to the outside and prevents water in the form of water droplets, such as rainwater, from penetrating into the clothing.

Technology development for such breathable and waterproof fabrics has been steadily progressing since the 1960s and accelerated with the development of Gore-Tex in the mid-to-late 1970s, and various technologies are still being developed to improve its performance.

Depending on the manufacturing method, these moisture-permeable waterproof materials can be roughly divided into a coating type that forms a film and a laminating type that bonds thin films. The coating type has fine pores on the fabric in water. A wet coating type that forms a polyurethane coating layer, and a resin composition containing a highly volatile organic solvent is coated on the fabric to a certain thickness and then heat treated to volatilize the volatile organic solvent to form a porous polyurethane film layer on the fabric. It can be classified into dry coating type.

Conventional technologies for the moisture-permeable waterproof material include Japanese Patent Application Publication No. 5-124144, which discloses a moisture-permeable waterproof sheet manufactured by bonding a non-woven fabric composed of a porous polyethylene film and heat-sealable fibers with heat and pressure in connection with a laminating method, and L-lysine and There is a Japanese Patent Application Laid-Open No. 3-213581, etc., which discloses a moisture-permeable waterproof fabric with excellent abrasion resistance manufactured by laminating a moisture-permeable film made of polyamino acid-based polyurethane containing more than 0.1% of powder made of organic acid reactants onto the fabric.

In addition, Republic of Korea Patent Publication No. 10-2012-0086149 discloses a base layer including a porous film layer and a base fabric layer; Preparing a moisture-permeable waterproof fabric including a nanoweb layer laminated on the porous film layer and a fabric laminated with a porous film; Preparing a nanoweb manufactured by electrospinning; and a laminating step of laminating the nanoweb to the porous film on the fabric.

However, in the case of the manufacturing method of the moisture-permeable waterproof material disclosed in the above prior arts, there is a problem of lack of functionality such as wear resistance and static electricity generation. Meanwhile, in the case of polytetrafluoroethylene (PTFE) material, commonly known as the material of Gore-Tex, fine pores are formed uniformly in the membrane, and it has excellent moisture permeability as well as chemical resistance and light fastness, so it is the most preferred despite its high price. It is becoming. However, the PTFE material has poor mechanical fatigue strength and washing durability, and contains environmentally hazardous substances such as PFCs (perfluorinated and polyfluorinated compounds), FTOHs (Fluorotelomer alcohols), PFCAs (Perfluorinated carboxylic acids), PFOS (Perfluorinated sulfonate), and PFOA (perfluorooctanoic acid). There is a problem that it involves the risk of emitting etc. In particular, the PTFE material has a weight of about 25 g/m ² and has the problem of being unsuitable for ultra-light products.

Therefore, there is a need to develop a multifunctional outdoor fabric and a manufacturing method that do not use environmentally hazardous substances as mentioned above, are suitable for use in various outdoor environments, have excellent abrasion resistance properties, and can prevent the generation of static electricity. there is.

The present invention is intended to solve the problems of the prior art as described above. By incorporating a functional layer containing graphene oxide nanofiller and aramid nanofiber into the fabric, wear resistance and static electricity generation are improved to be suitable for use in various outdoor environments. The technical task is to provide a multi-functional outdoor fabric and a manufacturing method that can prevent it.

The method for manufacturing multifunctional outdoor fabric 25 according to the present invention to solve the above problem includes the first step of producing a first mixed solution in which graphene oxide nanofiller, aramid nanofiber, and polyurethane resin are mixed in a solvent. ; A second step of manufacturing a functional layer using the first mixed solution prepared in the first step; and a third step of combining the functional layer with the fabric, wherein the functional layer 35 may be composed of a functional film or a non-woven fabric sheet, and the functional film may be manufactured by knife casting or solution casting. , the non-woven fabric sheet may be manufactured by electrospinning or centrifugal spinning, the thickness of the functional film and non-woven fabric sheet is 50 to 150 ㎛, and the first mixed solution contains 30 to 60% by weight of polyurethane and graphene oxide nanofiller. It contains 0.1 to 2% by weight, 1 to 20% by weight of aramid nanofibers, and the remainder of the solvent, wherein the solvent is dimethylformamide or methyl ethyl ketone, and the graphene oxide nanofiller is pretreated to improve dispersibility. However, in the pretreatment, a second mixed solution is prepared by mixing 3 to 10 weight of the graphene oxide nanofiller, 20 to 45 weight% of meta-toluic acid, and 50 to 75 weight% of dimethylformamide, and stirred for 30 minutes. In order to improve the dispersibility of the graphene oxide nanofiller during the stirring, it is preferable that ultrasonic waves are irradiated to the second mixed solution.

In addition, the fabric may be a fabric (25) made of any one of nylon fibers, polyethylene terephthalate fibers, polyethylene fibers, polypropylene fibers, cotton fibers, wool fibers, hemp fibers, and silk fibers, and the viscosity of the first mixed solution is is 5,000 to 40,000 cps at 25°C, and the third step includes: i) a 3-1 step of applying a thermoplastic hot melt adhesive to the fabric in a dot shape; ii) a 3-2 step of combining the functional layer and a fabric coated with a thermoplastic hot melt adhesive in a dot shape; and iii) a 3-3 step of cooling the combined functional layer and the fabric to produce a multi-functional outdoor fabric, wherein the 3-1 step is performed using a dot roller. The number of discharge holes of the thermoplastic hot melt adhesive on the roller is 30 to 180 per 1 cm ² , the diameter of the discharge holes is 300 to 700 ㎛, the application speed is 10 to 20 m/min, and the step 3-2 is a pair of It is performed using pressing rolls, and the pair of pressing rolls presses the functional layer and the fabric at a pressure of 3 to 10 bar, and preferably has a surface temperature of 90 to 130 ° C.

And the beauty strength of the multifunctional outdoor fabric (25) manufactured as above is more than 25,000 times when tested in accordance with ISO 12947-2, and the frictional electric voltage is 17,000 times in the inclined direction when tested according to the D method of JIS L 1094. V or less, and 14,000 V or less in the weft direction, the tensile strength is 900 to 1,300 N in the warp direction and 800 to 1,100 N in the weft direction, and the tear strength is 30 to 40 N in the warp direction, and 20 to 20 N in the weft direction. It is 25 N, the water pressure is 5,000 to 10,000 mmH ₂ O, the moisture permeability is 3,000 to 11,000 g/m ² /24h, and the water repellency is 5th grade.

The multifunctional outdoor fabric 25 according to the present invention is capable of preventing wear resistance and static electricity generation by the graphene oxide nanofiller and aramid nanofiber included in the combined functional layer 35, that is, the functional film or non-woven fabric sheet. It has an effect. In addition, the multi-functional outdoor fabric 100 according to the present invention is suitable for use in various outdoor environments and has moisture permeability and waterproofness, so it has the effect of providing excellent wearing comfort when used in the winter. In addition, since the functional layer 35 and the fabric 25 are produced by continuously combining them through one production line, continuous production is possible, which has the effect of improving productivity.

1 is a cross-sectional schematic diagram of a multifunctional outdoor fabric according to the present invention,
Figure 2 is a schematic diagram of a process diagram (a) and a dot roller (b) for combining a functional layer and a fabric according to the present invention;
Figure 3 is a photograph of a multifunctional outdoor fabric according to the present invention.

In this application, terms such as “comprise,” “have,” or “equipped with” are intended to designate the presence of features, numbers, steps, components, parts, or combinations thereof described in the specification, and are not intended to indicate the presence of one or more other features, numbers, steps, components, parts, or combinations thereof. It should be understood that this does not exclude in advance the possibility of the presence or addition of features, numbers, steps, operations, components, parts, or combinations thereof.

Additionally, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless clearly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

Below, preferred embodiments of the present invention will be described in more detail with reference to the attached drawings. In order to facilitate overall understanding when describing the present invention, the same reference numerals are used for the same components in the drawings, and duplicate descriptions for the same components are omitted.

Hereinafter, the manufacturing method of the multifunctional outdoor fabric 100 according to the present invention will be described in detail with reference to the accompanying drawings. attached to the present invention. Figure 1 is a cross-sectional schematic diagram of the multifunctional outdoor fabric 100 according to the present invention, and Figure 2 is a process diagram (a) and a dot roller (a) for combining the functional layer 35 and the fabric 25 according to the present invention. 120, b) is a schematic diagram, and Figure 3 is a photograph of the multifunctional outdoor fabric 100 according to the present invention.

The manufacturing method of the multifunctional outdoor fabric 100 according to the present invention includes a first step of producing a first mixed solution in which graphene oxide nanofiller, aramid nanofibers, and polyurethane resin are mixed in a solvent, and the first step It is preferable to include a second step of manufacturing the functional layer 35 using the first mixed solution prepared in and a third step of combining the functional layer 35 with the fabric 25.

As shown in FIG. 1, the multi-functional outdoor fabric 100 according to the present invention is provided with a functional layer 35 on the upper part of the fabric 25, and the multi-functional outdoor fabric 100 is manufactured. The first step is to prepare a first mixed solution in which graphene oxide nanofiller, aramid nanofibers, and polyurethane resin are mixed in a solvent.

Although the structure of graphene oxide is not clearly defined, it can be viewed as an oxide form of graphene and shows applicability in various fields due to its unique chemical properties.

Since the graphene oxide exists in a form combined with hydroxyl and epoxy groups on the surface and carboxyl groups at the edges, it loses most of graphene's unique properties. However, if graphene oxide is reduced again to remove functional groups including oxygen, it again exhibits properties similar to graphene.

The graphene oxide has hydrophilic functional groups such as hydroxyl group (-OH) and carboxyl group (-COOH), and has excellent solubility in water and alcohol. However, in order to develop graphene oxide into various uses, high dispersion characteristics in organic solvents, etc. are required. Therefore, the hydrophobic amine group (-NH ₂ ) present in the graphene oxide can improve dispersion characteristics, and a hydrophobic surface can be formed using the hydrophobic functional group.

According to the present invention, the graphene oxide nanofiller is preferably formed to have an average particle size of 50 to 200 nm in order to smoothly perform the manufacturing process of the first mixed solution and increase the dispersion speed.

In addition, the aramid contained in the first mixed solution is a polymer compound in which more than 85% of the aromatic compound having a ring-shaped molecular structure is linked by an amide bond (-NHCO-) consisting of nitrogen, hydrogen, carbon, and oxygen, and is a para-aramid and There are meta-aramids, etc. The para-aramid and meta-aramid are used in various forms such as fabrics, fibers, and pulp.

The aramid nanofiber according to the present invention can use both the para-aramid fiber and the meta-aramid fiber, but according to the present invention, it is preferable to use the para-aramid fiber as the aramid nanofiber.

The para-aramid fiber refers to a fiber having a molecular structure in which at least 85% of amide bonds (-NHCO-) are para-type bonded between aromatic rings.

Aramid nanofibers according to the present invention are made by separating and selecting para-aramid fibers made of fabric, fiber, pulp, etc., feeding them into the interior through the inlet of a compression grinder, and then completely pulverizing the para-aramid fibers to form nanofibers. It is manufactured with

After the para-aramid fibers are introduced into the compression grinder, they are pulverized into powder form by a high-speed rotating cutter provided on the inner bottom of the compression grinder and then collected in a collection tank located at the bottom, so that aramid nanofibers can be produced. there is.

At this time, the aramid nanofibers are preferably formed with an average particle size of 50 to 200 nm in order to smoothly perform the manufacturing process of the mixed solution and increase the dispersion rate.

The graphene oxide nanofiller and aramid nanofiber prepared as above are mixed with polyurethane resin and solvent to prepare the first mixed solution.

The first mixed solution is for producing a functional layer 35, that is, a functional film or non-woven fabric sheet, combined with the fabric 25, and according to the present invention, 30 to 60% by weight of polyurethane resin and graphene oxide nanofiller It is preferably prepared containing 0.1 to 2% by weight of aramid nanofibers and 1 to 20% by weight of aramid nanofibers, and the balance is a solvent.

Considering the appropriate ratio of polyurethane resin and solvent for forming the functional layer 35 when preparing the first mixed solution, if the ratio of polyurethane resin is less than 30% by weight, the amount of polyurethane resin is small and the amount of polyurethane resin is small. It is difficult to mix with graphene oxide nanofiller and aramid nanofiber, and if it exceeds 60% by weight, the amount of graphene oxide nanofiller and aramid nanofiber is relatively small, making it efficient after manufacturing the multifunctional outdoor fabric (100). Functionality becomes impossible.

In addition, when preparing the first mixed solution, it is preferable to use dimethylformamide (hereinafter referred to as DMF) or methyl ethyl ketone (hereinafter referred to as MEK) as a solvent.

That is, it is possible to prepare the first mixed solution by mixing the polyurethane resin, graphene oxide nanofiller, aramid nanofiber, and the remaining solvent in the same composition as above, and then stirring.

In addition, according to the present invention, the graphene oxide nanofiller has poor dispersibility, so dispersion may be difficult when preparing the first mixed solution. According to the present invention, pretreatment can be performed to improve the dispersibility of the graphene oxide nanofiller, and the pretreatment includes 3 to 10 weight of the graphene oxide nanofiller and 20 to 45% of m-Toluic acid. % by weight and 50 to 75 wt% of DMF may be mixed to prepare a second mixed solution, followed by stirring for 30 minutes.

The graphene oxide is mainly used by dispersing it in a polymer resin or solvent, but the graphene oxide has poor dispersibility, so dispersion may be difficult.

Therefore, in order to improve the dispersibility of the graphene oxide, the present invention improves the dispersibility by treating the graphene oxide with acid. That is, after preparing a second mixed solution by mixing 3 to 10 wt. of the graphene oxide nanofiller, 20 to 45 wt.% of m-Toluic acid, and 50 to 75 wt.% of DMF, the second mixed solution was By stirring for 30 minutes, the dispersibility of the graphene oxide is improved.

By pretreating graphene oxide as described above, hydrophilic functional groups such as hydroxy groups (-OH) and carbonyl groups (-C=O) are formed on the surface of the graphene oxide, thereby improving dispersibility. .

In addition, according to the present invention, in order to improve the dispersibility of the graphene oxide nanofiller as described above, ultrasonic waves can be irradiated to further improve the dispersibility during pretreatment.

During the pretreatment, when mechanical vibration is applied to the second mixed solution containing the graphene oxide nanofiller through an ultrasonic generator, countless vacuum bubbles called cavitation are generated in the second mixed solution. These vacuum bubbles are The breaking force improves the dispersibility of the graphene oxide nanofiller.

Specifically, the ultrasonic generator is divided into an oscillator unit and a vibrator unit, and the high-frequency energy generated in the oscillator unit is transmitted to the vibrator and converted into mechanical amplitude. When this energy is transferred to the mixed solution through a part called the tip, the Vacuum bubbles are generated in the second mixed solution, and the force of breaking these vacuum bubbles crushes the lumps of the graphene oxide nanofiller, thereby improving dispersibility.

The output of the ultrasonic generator used in the present invention is preferably 50 to 500 Watt, and the frequency is particularly preferably 10 to 200 kHz.

When ultrasonic waves are irradiated to the second mixed solution as described above, the dispersion efficiency of the graphene oxide nanofiller can be greatly improved.

After preparing the first mixed solution through the first step as described above, the functional layer 35 is manufactured using the first mixed solution in the second step.

The functional layer 35 manufactured using the first mixed solution containing the graphene oxide nanofiller and aramid nanofiber can be manufactured in the form of a functional film or non-woven fabric sheet.

The production of a functional film using the first mixed solution is possible through a commonly known film casting method.

That is, according to the present invention, the first mixed solution prepared in the first step can be used to produce a functional film by knife casting or solution casting. In order to manufacture a functional film by knife casting or solution casting as described above, the viscosity of the first mixed solution is preferably 5,000 to 40,000 cps at 25°C.

When the viscosity of the first mixed solution is 5,000 to 40,000 cps at 25°C, it can be cast to an appropriate thickness to increase workability and productivity.

In the solution casting method, the first mixed solution is coated on one side of a release paper, etc., and the final thickness is preferably 50 to 150 ㎛ considering tactile feel and functionality. When the final thickness is 50 ㎛ or less, the strength of the functional film is significantly reduced, causing many problems with peeling, and it is judged to be uneconomical in terms of production efficiency. In addition, if the final thickness exceeds 150 ㎛, the thickness of the multifunctional outdoor fabric 100 manufactured by combining it with the fabric 25 may be so thick that the wearing comfort may be poor.

According to the solution casting method, the first mixed solution is cast on a substrate such as release paper with low surface tension, and the solvent DMF or MEK is first evaporated during the drying process to form a porous functional film with excellent moisture permeability. It can be manufactured with

Additionally, the first mixed solution can be used to produce a functional film using a knife over roll coating method. That is, casting is performed on release paper using a knife over roll coating method and dried in a dryer while gradually raising the temperature to 80 to 120°C over 5 to 20 minutes. The functional film dried in this way is also porous and can be manufactured into a functional film with excellent moisture permeability.

As the functional layer 35 using the first mixed solution, a non-woven fabric sheet can also be made through a commonly known non-woven fabric manufacturing method.

That is, it is also possible to manufacture the multifunctional outdoor fabric 100 by manufacturing the first mixed solution prepared in the first step into a non-woven fabric sheet by electrospinning or centrifugal spinning and combining it with the fabric 25 in the third step. .

Electrospinning to produce the non-woven sheet can be performed by a method known in the field, for example, by supplying the first mixed liquid to an electrospinning nozzle and using a high voltage generator between the nozzle and the current collector. It can be performed by creating a high electric field (10kV~100kV).

Additionally, the first mixed solution can be manufactured into a non-woven fabric sheet by centrifugal spinning, which produces fibers using centrifugal force.

The nonwoven fabric sheet manufactured by electrospinning or centrifugal spinning as described above is formed of ultrafine fibers mixed with the graphene oxide nanofiller and aramid nanofiber.

The functional layer 35 manufactured through the second step as described above is then combined with the fabric 25 in the third step to manufacture the multifunctional outdoor fabric 100 according to the present invention.

The fabric 25 used in the third step is preferably a fabric 25 made of any one of nylon fibers, polyethylene terephthalate fibers, polyethylene fibers, polypropylene fibers, cotton fibers, wool fibers, hemp fibers, and silk fibers. do.

The fabric 25 used in the third step is a support (background material) for combining the functional film or non-woven fabric sheet manufactured in the second step to manufacture the multifunctional outdoor fabric 100 according to the present invention. can be used

The tensile strength of the fabric 25 is preferably 50 to 200 kg/5cm, and the basis weight is 50 to 150 g/m ² .

The material of the fabric 25 is preferably one or more selected from the group consisting of nylon fiber, polyethylene terephthalate fiber, polyethylene fiber, polypropylene fiber, cotton fiber, wool fiber, hemp fiber, and silk fiber. .

In addition, the third step of combining the functional layer 35 and the fabric 25 includes the 3-1 step of applying the thermoplastic hot melt adhesive 50 to the fabric 25 in a dot shape, and the functional layer 35 ) and the thermoplastic hot melt adhesive 50 applied in a dot shape in the 3-2 step of combining the fabric 25 and cooling the combined functional layer 35 and the fabric 25 to form a multifunctional outdoor fabric (100) ) It is preferable to include the 3-3 step of producing.

The third step of combining the functional layer 35 and the fabric 25 as described above will be described with reference to FIG. 3.

The 3-1 step is a step of applying the thermoplastic hot melt adhesive 50 to the fabric 25 in a dot shape. As shown in FIG. 2, the 3-1 step is performed using a dot roller 120. It can be done.

That is, the dot roller 120 for applying the adhesive in a dot shape on the upper part of the fabric 25 has 30 to 180 thermoplastic thermoplastic dots per 1 cm ² on the surface of the roller, as shown in (b) of FIG. 2. It is preferable that the hot melt adhesive 50 has an outlet 15 through which the hot melt adhesive 50 is discharged, and the diameter of the outlet 15 is 300 to 700 ㎛.

When provided with an outlet having the above diameter, the manufactured multifunctional outdoor fabric 100 can maintain a water pressure of 5,000 to 10,000 mmH ₂ O and a moisture permeability of 3,000 to 11,000 g/m2day.

During the laminating process using the dot roller 120 having the discharge port as described above, the surface temperature of the dot roller 120 is preferably maintained at a temperature that does not solidify the thermoplastic hot melt adhesive 50, and in particular, it is 105 to 105. It is desirable to maintain 110°C.

In addition, in order to maintain moisture permeability and water resistance as described above, it is particularly preferable that the application speed of the dot roller 120 is 10 to 20 m/min.

The adhesive used in the present invention is a thermoplastic hot melt adhesive (50). At this time, the viscosity of the thermoplastic hot melt adhesive 50 used is preferably 5,000 to 50,000 cps, and the solid content is preferably in the range of 20 to 50% by weight.

In the present invention, the fabric 25 is continuously supplied as shown in (a) of FIG. 2, and the thermoplastic hot melt adhesive 50 is applied to the upper part of the fabric 25 in a dot shape through the dot roller 120. do. At this time, the amount of the thermoplastic hot melt adhesive 50 applied when dry is preferably about 10 to 30 g/m2, and the application speed is especially preferably 20 to 30 m/min.

As shown in (a) of FIG. 2, the thermoplastic hot melt adhesive 50 provided inside the dot roller 120 is applied in a dot shape on the upper part of the fabric 25 supplied to the dot roller 120. do.

After the thermoplastic hot melt adhesive 50 is applied to the fabric 25 in a dot shape through step 3-1 as described above, in step 3-2, the functional layer 35 and the thermoplastic hot melt adhesive ( The fabric 25 applied in a dot shape 50 is pressed and combined.

As described above, the fabric 25 on which the thermoplastic hot melt adhesive 50 is applied in a dot shape is then introduced into a pair of pressing rolls 60 as shown in (a) of FIG. 2. In addition, before the fabric 25 is introduced into the pressing roll 60, a functional film or non-woven sheet is supplied to the top of the fabric 25.

The pressing roll 60 is pressed at a pressure of 3 to 10 bar for smooth adhesion between the fabric 25 and the functional film or non-woven sheet, and is also pressed at a pressure of 90 to 10 bar to prevent solidification of the thermoplastic hot melt adhesive 50. It is desirable to have a surface temperature of 130°C.

If the surface temperature of the pressing roll 60 exceeds 130 ℃, there is a risk that the functional film or non-woven fabric sheet to be laminated may be damaged by heat, and if the temperature is less than 90 ℃, the thermoplastic hot melt adhesive 50 does not melt, causing the above-mentioned The adhesion between the fabric 25 and the functional film or non-woven sheet may decrease.

As described above, the functional film or non-woven fabric sheet, which is the fabric 25 and the functional layer 35, combined by a pair of pressing rolls 60 is later, in step 3-3, a pair of cooling rolls ( While passing through 70), the thermoplastic hot melt adhesive 50 is cooled to manufacture the multifunctional outdoor fabric 100 according to the present invention. When performing step 3-3, it is particularly preferable that the surface temperature of the pair of cooling rolls 70 is 25 to 50°C.

By combining the fabric 25 and the functional layer 35 through the third step as described above, it is possible to manufacture a multi-functional outdoor fabric 100 with excellent moisture permeability and waterproofness according to the present invention as shown in FIG. 3. I do it. The multifunctional outdoor fabric 100 manufactured as described above has excellent elasticity by combining the functional layer 35 made of polyurethane resin, and the graphene oxide nano-filler and aramid nano contained in the functional layer 35. The fiber has the effect of preventing wear resistance and static electricity generation.

Hereinafter, the present invention will be examined in more detail through examples. However, the present invention is not limited to the following examples.

[Example 1]

A first mixed solution was prepared by mixing 30% by weight of polyurethane resin, 0.1% by weight of graphene oxide nanofiller, 1% by weight of aramid nanofiber, and the balance of DMF, and the first mixed solution was coated with a knife over roll on release paper. , the DMF was removed to prepare a porous functional film with a thickness of 50 ㎛. At this time, the graphene oxide nanofiller was pretreated to improve dispersibility, and the pretreatment was performed by mixing 3 weight of the graphene oxide nanofiller with 20% by weight of meta-toluic acid and 77% by weight of DMF and stirring for 30 minutes. . Thereafter, the functional film from which the release paper was removed was laminated on nylon fabric 25 with a basis weight of 50 g/m ² and a tensile strength of 50 kg/5 cm through a dot laminating process. In the dot laminating process, 30 discharge holes with a diameter of 300 ㎛ are formed per cm ² , a dot roller 120 with a surface temperature of 105 ℃ is used, and a thermoplastic hot melt adhesive is applied in an amount of 10 g/m ² . did. Afterwards, the functional film and nylon fabric are combined by pressing at a pressure of 3 bar using a pair of pressing rolls with a surface temperature of 90 ℃, and then cooled using a pair of cooling rolls with a surface temperature of 25 ℃. A test piece was prepared.

[Example 2]

A test piece was prepared in the same manner as in Example 1, except that the first mixed solution was prepared by mixing 50% by weight of polyurethane resin, 1% by weight of graphene oxide nanofiller, 10% by weight of aramid nanofibers, and the balance of DMF.

[Example 3]

A test piece was prepared in the same manner as in Example 1, except that the first mixed solution was prepared by mixing 60% by weight of polyurethane resin, 2% by weight of graphene oxide nanofiller, 20% by weight of aramid nanofiber, and the balance of DMF.

[Example 4]

A first mixed solution was prepared by mixing 30% by weight of polyurethane resin, 0.1% by weight of graphene oxide nanofiller, 1% by weight of aramid nanofiber, and the balance of MEK, and the mixed solution was electrospun to have a porosity of 150 ㎛ thickness. A nonwoven sheet was manufactured. At this time, the graphene oxide nanofiller was pretreated to improve dispersibility, and the pretreatment was performed by mixing 10 weight of the graphene oxide nanofiller with 45% by weight of meta-toluic acid and 45% by weight of DMF and stirring for 30 minutes. . Thereafter, the nonwoven fabric sheet was combined with a polyethylene terephthalate fabric (25) having a basis weight of 150 g/m ² and a tensile strength of 200 kg/5 cm through a dot laminating process. In the dot laminating process, 180 discharge holes with a diameter of 700 ㎛ are formed per cm ² , a dot roller 120 with a surface temperature of 110 ℃ is used, and a thermoplastic hot melt adhesive is applied in an amount of 30 g/m ^2. did. Afterwards, the non-woven fabric sheet and the polyethylene terephthalate fabric 25 are combined by pressing at a pressure of 10 bar using a pair of pressing rolls with a surface temperature of 130 ℃, and then a pair of cooling rolls with a surface temperature of 50 ℃. A test piece was manufactured by cooling using .

[Example 5]

A test piece was prepared in the same manner as in Example 4, except that the first mixed solution was prepared by mixing 50% by weight of polyurethane resin, 1% by weight of graphene oxide nanofiller, 10% by weight of aramid nanofibers, and the balance of MEK.

[Example 6]

A test piece was prepared in the same manner as in Example 4, except that the first mixed solution was prepared by mixing 60% by weight of polyurethane, 2% by weight of graphene oxide nanofiller, 20% by weight of aramid nanofibers, and the balance of MEK.

Abrasion strength, triboelectric voltage, tensile strength, tearing strength, water resistance, moisture permeability and water repellency were measured for the test pieces of Examples 1 to 6 prepared as above in the following manner, and the results are shown in Tables 1 and 2. shown in

1) Friction electric voltage

The triboelectric voltage of the test piece was measured according to the D method of JIS L 1094 (織及び編物の電性試方法) and measured in the warp and weft directions of the test piece.

2) Tensile strength

The tensile strength of the test piece was measured based on KSK 0520 (Textile - Tensile properties of fabric) and measured in the warp and weft directions of the test piece.

3) Tear strength

The tear strength of the test piece was measured in accordance with KSK ISO 13937 (Textile - Tear properties of fabric - Part 1, tear strength measurement by pendulum method), and was measured in the warp and weft directions of the test piece.

4) Abrasion strength

The abrasion strength of the test piece was measured according to KSK ISO 12947-2 (Abrasion strength of fabric by Martindale method. Part 2: Measurement of breaking point of the test piece).

5) Water pressure resistance

The water resistance of the test piece was measured according to KSK ISO 811 (Textile - Water resistance measurement - Hydrostatic method).

6) Water vapor permeability

The moisture permeability of the test piece was measured according to KSK ISO 15496 (Textile - Measurement of moisture permeability of textile for quality control).

7) Water repellency

The water repellency of the test piece was measured according to KS K 0590 ( Testing method for water repellency of fabric: spray method).

Tear strength (N) Friction voltage (V) Tensile strength (N) Slope direction Weft direction Slope direction Weft direction Slope direction Weft direction Example 1 30 20 15,320 13,842 902 806 Example 2 34 21 13,277 11,642 1,012 966 Example 3 36 23 11,624 9,863 975 978 Example 4 38 28 14,235 12.878 1,232 1,086 Example 5 40 30 12,604 10,366 1,306 1,096 Example 6 41 29 11,045 9,642 1,318 1,104

Water repellency (grade) Water pressure (mmH ₂ O) Water vapor permeability (g/m ² /24h) Abrasion strength (times) Example 1 5 5,012 11,012 26,322 Example 2 5 6,008 10,896 30,991 Example 3 5 5,463 9,845 42,145 Example 4 5 9,879 4,253 27,332 Example 5 5 10,021 3,876 31,256 Example 6 5 10,620 3,006 41,187

Looking at Table 1, the tensile strength of the multifunctional outdoor fabric 100 according to the present invention is 900 to 1,300 N in the warp direction and 800 to 1,300 N in the weft direction when measured based on KSK 0520 (Textile - Tensile properties of fabric). It is measured to have a range of 1,100 N.

In addition, the tear strength is 30 to 40 N in the warp direction and 20 to 25 N in the weft direction when measured based on KSK ISO 13937 (Textile - Tear properties of fabrics - Part 1 Measurement of tear strength by pendulum method). It is measured as having a range.

In addition, the friction charge is measured to be in the range of 17,000 V or less in the warp direction and 14,000 V or less in the weft direction when measured based on the D method of JIS L 1094 (JIS L 1094).

The triboelectric voltage is an effect due to the graphene oxide nanofiller included in the functional layer 25. Looking at the measurement results of Examples 1 to 3, the graphene oxide nanofiller is mixed at 0.1% by weight. It can be seen that the triboelectric voltage of Example 3, in which the graphene oxide nanofiller was mixed at 2% by weight, was significantly reduced compared to 1. It can be seen that this trend shows the same results in Examples 4 to 6.

Looking at Table 2, the water repellency measured according to KS K 0590 was grade 5 in all test specimens of Examples 1 to 6, and the water resistance measured according to KSK ISO 811 was in the range of 5,000 to 10,000 mmH ₂ O. and the moisture permeability measured according to KSK ISO 15496 is measured to have a range of 3,000 to 11,000 g/m ² /24h.

In addition, it can be confirmed that the wear strength measured according to KSK ISO 12947-2 shows more than 25,000 measurement results for all test specimens. The wear strength is an effect due to the aramid nanofibers included in the functional layer 25. Looking at the measurement results of Examples 1 to 3, compared to Example 1 in which the aramid nanofibers are mixed at 1.0% by weight, the aramid nanofibers are mixed at 1.0% by weight. It can be seen that the abrasion strength of Example 3, in which fibers were mixed at 20% by weight, significantly increased. It can be seen that this trend shows the same results in Examples 4 to 6.

As a result of the above review, the multifunctional outdoor fabric 25 according to the present invention has improved abrasion strength and triboelectric voltage characteristics by the graphene oxide nanofiller and aramid nanofiber included in the combined functional layer 35. You can check that. In addition, it has excellent properties such as moisture permeability and water pressure resistance, making it suitable for use in various outdoor environments and providing excellent wearing comfort when used in the winter.

The present invention has been described with reference to the experimental examples shown in the drawings, but these are merely exemplary, and those skilled in the art will understand that various modifications and other equivalent experimental examples are possible therefrom. Additionally, a person skilled in the art to which the present invention pertains will understand that the present invention can be easily modified into another specific form without changing its technical idea or essential features. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive, and the true scope of technical protection of the present invention should be determined by the technical spirit of the appended claims.

100: Multifunctional outdoor fabric
25: Fabric
35: functional layer
120: Dot roller
60: Pressure roll
70: cooling roll

Claims (6)

A first step of preparing a first mixed solution in which graphene oxide nanofiller, aramid nanofibers, and polyurethane resin are mixed in a solvent;
A second step of manufacturing a functional layer using the first mixed solution prepared in the first step; and
A method of manufacturing a multi-functional outdoor fabric comprising a third step of combining the functional layer with the fabric.
In claim 1,
A method of manufacturing a multi-functional outdoor fabric, characterized in that the functional layer is composed of a functional film or a non-woven fabric sheet.
In claim 2,
A method of manufacturing a multi-functional outdoor fabric, characterized in that the thickness of the functional film and non-woven fabric sheet is 50 to 150 ㎛
In claim 1,
The fabric is a method of manufacturing a multifunctional outdoor fabric, characterized in that the fabric is made of any one of nylon fibers, polyethylene terephthalate fibers, polyethylene fibers, polypropylene fibers, cotton fibers, wool fibers, hemp fibers, and silk fibers.
In claim 1,
The third step is,
i) Step 3-1 of applying a thermoplastic hot melt adhesive to the fabric in a dot shape;
ii) a 3-2 step of combining the functional layer and a fabric coated with a thermoplastic hot melt adhesive in a dot shape; and
iii) A method for manufacturing a multi-functional outdoor fabric, comprising the step 3-3 of manufacturing a multi-functional outdoor fabric by cooling the combined functional layer and the fabric.
Multifunctional outdoor fabric manufactured by the manufacturing method of multifunctional outdoor fabric of claims 1 to 5.