KR20150108293A - Breathable and waterproof fabric for improved adhesive strength and method of manufacturing the same - Google Patents

Abstract

The present invention relates to a moisture-permeable waterproof fabric which can have enhanced adhesive strength and a method for manufacturing the same. The moisture-permeable waterproof fabric includes: a hot-melt web which is attached on a first fabric base material and has a plurality of air holes; a porous base material which has one side attached on the hot-melt web and includes a plurality of air holes; a pattern of a hot-melt adhesive in a solid phase or a hot-melt web which is attached on the other side of the porous base material; and a second fabric base material on which the pattern of the hot-melt adhesive in a solid phase is formed.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a breathable waterproof fabric having improved adhesion strength,

More particularly, the present invention relates to a moisture-permeable and waterproof fabric, and more particularly, to a method of bonding a fabric base material and a porous base material using a hot-melt web and a solid-state hot-melt adhesive powder, Permeable waterproof fabric capable of improving strength and a method of manufacturing the same.

In recent years, interest in health and leisure activities has increased, and functional materials have been applied to various fields. Particularly, materials with breathable and waterproof function are being emphasized more and more in the luxury and wellness boom.

Breathable waterproof fabric is a functional fabric with excellent moisture permeability and water repellency that emits sweat and prevents rain. It is applied for climbing and outdoor activities such as climbing clothes, outdoor clothes and sleeping bags, and its application range is widening.

The breathable waterproof fabric is designed to provide comfort by allowing the water to penetrate, while the sweat coming from the body is vaporized and discharged to the outside, and the breathable waterproof fabric is excellent in wearing comfort.

Waterproof materials are classified into three materials such as PTFE film, polyester film, and PU lamination. Gore-Tex is currently leading the world's breathing and waterproof market with PTFE film. However, new materials that can replace existing breathable waterproof materials .

Korean Patent Registration No. 10-1106679 discloses a polyurethane nanofiber web composed of polyurethane nanofibers having an average diameter of 1,000 nm or less and part of the polyurethane nanofiber is a moisture-curing polyurethane nanofiber, A waterproof fabric is manufactured by thermocompression bonding the fabric with a sprayed fabric. However, such a fabric can facilitate the process of bonding the polyurethane nanofiber web to the fabric by lowering the shrinkage ratio of the polyurethane nanofiber web at room temperature. However, by spraying the liquid adhesive, the uneven application distribution of the liquid adhesive at the fabric is obtained, The liquid adhesive is impregnated into the fabric, which hinders the breathing.

Accordingly, the present inventors have continuously studied the moisture-permeable and waterproof fabric capable of improving the bonding strength, and by fabricating the fabric by bonding the fabric substrate and the porous substrate using the hot melt web and the solid hot melt adhesive pattern, The present invention relates to a waterproof and waterproof fabric of the present invention which can improve the characteristics of the moisture permeable and waterproof fabric and can reduce the weight of the moisture permeable and waterproof fabric, .

Korean Patent Registration No. 10-1106679

An object of the present invention is to provide a method for producing a hot-melt adhesive, comprising the steps of laminating a hot-melt web having a plurality of pores between a first fabric substrate and a porous substrate, Waterproof fabric capable of improving the bonding strength between the first fabric base material and the porous base material and increasing the moisture permeation and waterproof efficiency and equalizing the moisture permeation efficiency by implementing the waterproof fabric, and a method for manufacturing the same.

Another object of the present invention is to provide a breathable waterproof fabric capable of reducing the weight of a fabric by adhering a lightweight nanofiber web to a fabric substrate with a hot melt web.

Another object of the present invention is to provide a method for manufacturing a porous substrate, which can perform an environmentally friendly process by using an adhesive for bonding a fabric substrate and a porous substrate in a solid state web and pattern, and can prevent the yellowing, contamination, bleaching, And a method for manufacturing the same.

In order to achieve the above-mentioned object, an embodiment of the present invention is directed to a method of manufacturing a fabric comprising: a first fabric substrate; A hot melt web adhered to the first fabric substrate and having a plurality of pores; A porous substrate having one surface bonded to the hot melt web and having a plurality of pores; A solid-phase hot melt adhesive pattern or hot-melt web adhered to the other surface of the porous substrate; And a second fabric substrate on which the solid-state hot-melt adhesive pattern is formed; and a moisture-permeable waterproof fabric capable of improving the adhesive strength.

Further, an embodiment of the present invention includes a method of manufacturing a hot-melt web, comprising: melting a hot-melt web to thermally adhere a first fabric substrate and a porous substrate; Forming a solid hot melt adhesive pattern on the second textile substrate; And melting the solid-state hot-melt adhesive pattern to thermally adhere the porous substrate to the second textile base material. The present invention also provides a method of manufacturing a moisture-permeable and waterproof fabric capable of improving the bonding strength.

In addition, one embodiment of the present invention is directed to a method of forming a solid state hot melt adhesive pattern, comprising: forming a solid hot melt adhesive pattern on a second textile substrate; Sequentially laminating a porous substrate, a hot-melt web, and a first fabric substrate on the second fabric substrate on which the solid hot melt adhesive pattern is formed; And fusing the hot melt web and the solid hot melt adhesive pattern to thermally adhere the first fabric substrate and the porous substrate and the porous substrate and the second fabric substrate to improve bonding strength, A method for manufacturing a waterproof fabric is provided.

According to another aspect of the present invention, there is provided a method of manufacturing a moisture-permeable waterproof fabric, comprising: feeding a laminated structure of a fabric substrate, a solid-state hot-melt web and a porous substrate to a calender roll to which heat is applied; Melting the solid hot melt web by heat applied in the calender roll and adhering it to the fabric substrate and the porous substrate; And cooling the solid base material and the solid-state hot-melt web adhered to the porous base material by cool air applied from a cooling fan.

According to another aspect of the present invention, there is provided a method of manufacturing a moisture-permeable and waterproof fabric, comprising the steps of: preparing a heating and cooling device provided with a heating and cooling tunnel in which a heater, a pressing roll and a cooler are sequentially arranged from an inlet to an outlet; Feeding a laminated structure of a fabric substrate, a solid hot melt web and a porous substrate to an inlet of the heating and cooling tunnel; Melting the solid-state hot-melt web with heat of the heater; Laminating the laminate structure with the squeeze roll; And cooling the laminated structure with the cooler.

As described above, in the present invention, the hot-melt web is sandwiched between the first fabric base and the porous base material, and the second fabric base material on which the solid-state hot-melt adhesive powder or the hot-melt web is formed is laminated on the porous base material, By implementing the moisture permeable and waterproof fabric by thermally adhering the first fabric base material and the porous base material and the porous base material and the second fabric base material by the pattern, the pore of the hot melt web, the pores of the porous base material, and the solid hot melt adhesive pattern, The efficiency can be improved and the moisture permeation efficiency can be made uniform.

The present invention can provide a technique capable of reducing the weight of a fabric by adhering a nanofiber web in which a lightweight nanofiber is accumulated and lightened to each of first and second fabric bases with a hot melt web and a solid hot melt adhesive pattern .

Further, in the present invention, it is possible to prevent the phenomenon that the porous substrate is peeled from the fabric base material by increasing the adhesion area between the fabric base material and the porous base material by using the sheeted hot-melt web to improve the bonding strength of the web with the fabric base material and the porous base material. can do.

In addition, in the present invention, it is possible to perform an eco-friendly process which is harmless to the human body, excellent in air permeability, pollution-free, non-toxic and solvent-free, by applying a colorless, tasteless and odorless thermoplastic hot-melt web.

In addition, in the present invention, by adhering the fabric substrate and the nanofiber web with a sheeted hot-melt web, there is an advantage that no phenomenon such as yellowing, contamination, bleaching or twisting occurs.

1 is a conceptual sectional view of a moisture-permeable and waterproof fabric capable of improving the bonding strength according to the present invention,
FIG. 2 is a schematic view for explaining a hot-melt web applied to a breathable and waterproof fabric according to the present invention,
3 is a conceptual cross-sectional view illustrating a solid hot melt adhesive coated on a textile substrate in accordance with the present invention,
FIG. 4 is a photograph of a fabric substrate coated with a solid-state hot-melt adhesive according to the present invention,
5A to 5C are conceptual sectional views illustrating a method of manufacturing a moisture-permeable and waterproof fabric according to a first embodiment of the present invention,
6A to 6C are conceptual cross-sectional views illustrating a process of using a carrier member in a method of manufacturing a moisture-permeable and waterproof fabric according to a first embodiment of the present invention,
7A to 7C are conceptual cross-sectional views illustrating a method of manufacturing a moisture-permeable and waterproof fabric according to a second embodiment of the present invention,
8 is a schematic diagram of an electrospinning apparatus for producing a nanofiber web according to the present invention,
Figure 9 is a schematic diagram of a device for forming a solid hot melt adhesive pattern on a textile substrate in accordance with the present invention,
Fig. 10 is a view showing a configuration of a calender roll type apparatus for adhering a fabric substrate and a porous substrate with a solid-phase hot-melt web according to the present invention,
11 is a plan view of the apparatus for bonding a fabric substrate and a porous substrate with a solid-phase hot-melt web according to the present invention,
12 and 13 are test reports showing the water pressure and moisture permeability evaluation results of the moisture-permeable and waterproof fabric according to the embodiment of the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and the inventor may appropriately define the concept of the term in order to best describe its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

FIG. 1 is a conceptual sectional view of a moisture-permeable and waterproof fabric capable of improving the bonding strength according to the present invention, FIG. 2 is a schematic partial view for explaining a hot-melt web applied to a breathable and waterproof fabric according to the present invention, FIG. 4 is a photograph of a fabric substrate coated with a solid hot-melt adhesive according to the present invention. FIG. 4 is a conceptual sectional view illustrating a solid-state hot-melt adhesive coated on a fabric substrate according to the present invention.

Referring to FIG. 1, a moisture permeable and waterproof fabric capable of improving the adhesive strength according to the present invention comprises a first fabric substrate 100; A hot melt web 110 bonded to the first fabric substrate 100 and having a plurality of pores; A porous substrate 120 having one surface bonded to the hot melt web 110 and having a plurality of pores; A solid-phase hot melt adhesive pattern 131 adhered to the other surface of the porous substrate 120; And a second fabric substrate 130 on which the solid-state hot-melt adhesive pattern 131 is formed. Here, a hot-melt web may be used in place of the solid-phase hot-melt adhesive powder 131. [ Here, the solid-state hot-melt adhesive pattern 131 may be replaced by a hot-melt web.

As shown in FIG. 2, the hot-melt web 110 has a web shape having a plurality of pores 112 in which fibers 111 made of a hot-melt material are accumulated, and has a solid sheet shape.

In the present invention, the hot-melt web 110 is interposed between the first fabric substrate 100 and the porous substrate 120, and then the first fabric substrate 100 and the porous substrate 120 are bonded to the hot- As shown in Fig.

Here, the first and second fabric bases 100 and 130 include all materials for fabricating casual suits, sports suits and the like as fabrics including a fabric.

It is preferred that the weaving density of the second fabric substrate 130 is relatively lower than the weaving density of the first fabric substrate 100. That is, when the moisture-permeable and waterproof fabric is made into a garment, the first fabric substrate 100 is exposed to the outside and directly affects the outer appearance of the garment, so that the fabric should have a relatively high density, 130 may have only a limited function to protect the porous substrate 120 in proximity to the human body, so that it is preferable to have a relatively low density woven fabric in order to reduce manufacturing costs. For this reason, the second fabric substrate 130 may be referred to as a back sheet.

Therefore, in the moisture permeable and waterproof fabric capable of improving the bonding strength according to the present invention, the hot melt web 110 and the porous substrate 120 are provided with pores and the solid hot melt adhesive pattern 131 is interposed therebetween , The air permeability can be improved, and the moisture permeation efficiency and waterproof efficiency can be improved.

In the present invention, a water-soluble acrylic layer (not shown) may further be interposed between the solid-state hot-melt adhesive pattern 131 and the second fabric substrate 130, and the water- It is possible to prevent the solid-state hot-melt adhesive pattern 131 from being peeled off due to the external force because the bonding strength with the fabric base material 130 is high.

In addition, the pores of the porous substrate 120 should have a proper size for carrying out the moisture permeation and waterproof function, and the pores of the hot melt web 110 should be porous So that moisture can escape smoothly through the air.

At this time, it is preferable that the pores of the hot melt web 110 are larger than the pores of the porous substrate 120. Here, the size of the pores of the hot-melt web 110 is 100 to 10,000 mu m, and the size of the pores of the porous substrate 120 is preferably 0.8 mu m or less.

That is, the hot-melt web 110 melts and participates in the adhesion. If the molten hot-melt material closes the pores, the moisture permeability may deteriorate. Therefore, the pore size of the hot-melt web 110 may be such that the molten hot- It is preferable to set the pore size of the porous substrate 120 larger than the pore size of the porous substrate 120.

The diameter of the nanofibers of the porous substrate 120 is preferably 0.5 to 1.5 占 퐉 and the amount of fibers of the hot-melt web 110 is preferably 10 to 20 gsm , And the accumulation amount of the porous substrate 120 is preferably less than 5 gsm.

The hot melt web 110 may be made of one of polyamide hot melt, polyester hot melt, polyurethane hot melt, polyolefin hot melt and EVA (ethylene vinyl acetate) hot melt .

The melting point of the hot-melt web 110 is preferably 150 ° C or less, and the melt index is preferably 5 to 500 cm 3/10 min.

That is, when the melt index is 5 cm 3/10 min or less, the adhesive strength between the hot melt web 110, the fabric base material 100 and the porous base material 120 is lowered. When the melt index is 500 cm 3 / Permeates the fabric base material 100 and the porous base material 120, and the water pressure is lowered.

As described above, in the present invention, the sheeted hot-melt web is adhered to the fabric base material and the porous base material to increase the bonding area, thereby improving the bonding strength between the fabric base material and the porous base material. Thereby, the phenomenon that the porous substrate is peeled off from the fabric base can be prevented.

The solid-state hot-melt adhesive pattern 131 is preferably embodied in a dot-like pattern composed of a solid-phase hot-melt adhesive powder spaced apart from the second fabric base 130 as shown in FIGS. 3 and 4. At this time, when the solid hot-melt adhesive is coated on the second fabric substrate 130 in a pattern shape and then cooled, a solid-state hot-melt adhesive pattern 131 is formed.

Thus, in the present invention, the nanofiber web is thermally bonded to the fabric substrate with the solid hot melt adhesive pattern, so that the solid hot-melt adhesive pattern for bonding is positioned only in the local region of the fabric substrate and the porous substrate, The area is reduced, and the area for carrying out the moisture-proof function is increased, so that the moisture-permeation efficiency can be improved.

On the other hand, in the prior art, when the porous substrate is bonded after the liquid adhesive is sprayed on the fabric substrate, the distribution of the sprayed liquid adhesive is uneven, and the liquid adhesive is concentrated on the local area, The efficiency of water permeation is not uniform such as the efficiency is lowered and the sprayed liquid adhesive adheres to most areas of the fabric base material, thereby obstructing the moisture permeation. However, the present invention has a technical feature to solve this problem.

The solid-state hot-melt adhesive pattern 131 described above may be one of urethane, polyamide, polyethylene, E.V.A., polyester, and P.V.C. thermoplastic resins.

The porous substrate 120 may be one of a nanofiber web, a nonwoven fabric, and a laminated structure thereof having a plurality of pores integrated by nanofibers. At this time, the nanofiber web is formed by electrospinning a spinning solution containing a mixture of a polymer material and a solvent to produce a nanofiber, and laminating the nanofiber.

Here, the electrospinning method applied to the present invention may be any one of general electrospinning, air-electrospinning (AES), centrifugal electrospinning, and flash-electrospinning It is also possible to use.

The polymeric material used in the present invention is capable of electrospinning, for example, a hydrophilic polymer and a hydrophobic polymer, and one or more of these polymers may be used in combination.

The polymer material usable in the present invention is not particularly limited as long as it is soluble in an organic solvent for electrospinning and is capable of forming nanofibers by electrospinning. For example, polyvinylidene fluoride (PVdF), poly (vinylidene fluoride-co-hexafluoropropylene), perfluoropolymers, polyvinyl chloride, polyvinylidene chloride or copolymers thereof, polyethylene glycol di Polyoxyethylene-polyoxypropylene oxide, polyethylene glycol derivatives including alkyl ethers and polyethylene glycol dialkyl esters, polyoxides including poly (oxymethylene-oligo-oxyethylene), polyethylene oxide and polypropylene oxide, polyvinyl acetate, poly (vinylpyrrolidone- Vinyl acetate), polystyrene and polystyrene acrylonitrile copolymers, polyacrylonitrile (PAN), polyacrylonitrile copolymers including polyacrylonitrile methyl methacrylate copolymers, polymethyl methacrylate, polymethyl methacrylate Acrylate copolymer or a mixture thereof.

Examples of usable polymer materials include polyamide, polyimide, polyamideimide, poly (meta-phenylene isophthalamide), polysulfone, polyetherketone, polyetherimide, polyethylene terephthalate, , Aromatic polyesters such as polyethylene naphthalate, polyphosphazenes such as polytetrafluoroethylene, polydiphenoxaphospazene, poly {bis [2- (2-methoxyethoxy) Polyurethane copolymers including polyether urethanes, cellulose acetate, cellulose acetate butyrate, and cellulose acetate propionate.

Accordingly, the polymer usable in the present invention is not particularly limited to thermosetting and thermosetting polymers capable of electrospinning.

The polymer material in the spinning solution is preferably 5 to 22.5% by weight.

If the content of the polymer material is less than 5% by weight, it is difficult to form a fibrous phase, and even if a particle is formed or spun by a spin without being sprayed, a bead And the volatilization of the solvent is not performed well, so that the porous substrate is melted during the calendering process of the web and the pore is clogged. When the content of the polymer material exceeds 22.5% by weight, the viscosity increases and solidification occurs on the surface of the solution, which makes it difficult to spin for a long time, and fiber diameter can not be increased to make a fibrous shape of less than a micrometer size.

For the solvent to be mixed with the polymer substance for preparing the spinning solution, a mono-component solvent such as dimethylformamide (DMF) may be used. In the case of using the two-component solvent, the boiling point it is preferable to use a two-component solvent in which the higher and the lower one are mixed.

In the two-component mixed solvent according to the present invention, the high boiling point solvent and the low boiling point solvent are preferably mixed in a weight ratio of 7: 3 to 9: 1. When the amount of the high boiling point solvent is less than 7, there is a problem that the polymer is not completely dissolved. When the amount of the high boiling point solvent is more than 9, the amount of the low boiling point solvent is too small. The problem that can not be done occurs.

If only a solvent having a high boiling point is used, spinning can not be performed and spraying is performed to form a lot of beads even if particles are formed or spinning rather than fibers, The volatilization of the solvent is not performed well, so that a partial melting occurs in the lamination process of the web and the pore is clogged.

In addition, when only a solvent having a low boiling point is used, since volatilization of the solvent occurs very rapidly, many fibers are generated on the needles of the spinning nozzle and act as a source of radiation trouble.

In the present invention, when the polymer material is PES and PVdF, respectively, the two-component mixed solvent is, for example, acetone (BP-56) as a high boiling point solvent, DMAc (N, N-Dimethylacetoamide: BP- (N-methylpyrrolidone: BP-202 to 204 占 폚) and THF (Terahydrofuran: BP-67 占 폚) in weight ratio of PEI and PVdF, respectively, To 9: 1.

In this case, the mixing ratio between the two-component mixed solvent and the entire polymer material is preferably set to about 8: 2 by weight.

The spinning solution obtained by mixing the polymer material and the solvent is electrospun using a multi-hole spinning pack to obtain a multi-layered porous substrate, and a thermocompression bonding step, for example, calendering is performed.

Calendering is performed at a high temperature and a high pressure at about 70 to 190 DEG C so that the pore size of the nanofiber web becomes 0.8 mu m or less.

In the present invention, when the nanofiber web is formed, a nanofiber web is formed by accumulating the nanofibers having a low weight by setting the accumulation amount of the nanofibers to less than 5 gsm to form a lightweight nanofiber web. The lightweight nanofiber web is bonded The weight and manufacturing cost of the moisture-permeable and waterproof fabric can be reduced.

5A to 5C are conceptual cross-sectional views illustrating a method of manufacturing a moisture-permeable and waterproof fabric according to a first embodiment of the present invention.

5A to 5C, a method of manufacturing a moisture-permeable and waterproof fabric having improved adhesive strength according to a first embodiment of the present invention comprises the steps of forming a hot-melt web 110 on a first fabric substrate 100 and a porous substrate 120 And the hot melt web 110 is fused to thermally adhere the first fabric substrate 100 and the porous substrate 120 (Fig. 5A). Next, a solid hot melt adhesive pattern 131 is formed on the second fabric substrate 130 (Fig. 5B). Thereafter, the solid-state hot-melt adhesive pattern 131 is melted and the porous substrate 120 is thermally adhered to the second fabric substrate 130 (Fig. 5C).

As described above, in the method of manufacturing the moisture permeable and waterproof fabric according to the first embodiment of the present invention, the melting points of the hot-melt web 110 and the solid-phase hot-melt adhesive pattern 131 are set differently, 1 hot-melt adhesive pattern 131 is fused to heat the porous substrate 120 to the second fabric substrate 130 by thermally adhering the fabric substrate 100 and the porous substrate 120 to each other.

In order to prevent the hot-melt web 110, in which the first fabric substrate 100 and the porous substrate 120 are thermally adhered to each other in the process of thermally adhering the porous substrate 120 to the second fabric substrate 130, It is preferable that the melting point of the solid-phase hot-melt adhesive pattern 131 is higher than the melting point of the solid-state hot-melt adhesive pattern 131.

That is, the process of thermally adhering the first fabric substrate 100 and the porous substrate 120 is performed at a higher temperature than the process of thermally adhering the porous substrate 120 to the second fabric substrate 130.

6A to 6C are conceptual cross-sectional views illustrating a process of using a carrier member in a method of manufacturing a moisture-permeable waterproof fabric according to a first embodiment of the present invention.

6A to 6C, the process of using the carrier member in the method of manufacturing the moisture permeable and waterproof fabric according to the first embodiment of the present invention is as follows. First, the spinning solution is discharged from the spinning nozzle 20 to the carrier member 500 To form a nanofiber web 121 composed of the nanofibers 121a (FIG. 6A).

Here, the carrier member 500 may be applied as a release paper, a nonwoven fabric, a fabric or the like, and the carrier member 500 may function as a base substrate for handling the nanofiber web 121, And protects the nanofiber web 121. [0064] As shown in FIG.

Thereafter, the hot-melt web 110 and the first fabric substrate 100 are laminated on the nanofiber web 121 and calendered to form the hot-melt web 110 to form the nanofiber web 121 and the first fabric substrate 100 (Fig. 6B). Calendering is performed by passing the structure in which the carrier member 500, the nanofiber web 121, the hot-melt web 110 and the first fabric substrate 100 are laminated to the rollers 251 and 252.

At this time, the nanofiber web 121, the hot melt web 110 and the first fabric substrate 100, which are electrospun into the carrier member 500, are fed between the rollers 251 and 252, And may be laminated to perform the calendering process.

6C, the carrier member 500 is detached from the nanofiber web 121 to form a moisture-permeable waterproof structure comprising the nanofiber web 121, the hot-melt web 110 and the first fabric substrate 100, The fabrication of the fabric is completed.

At this time, when the carrier member 500 is a release paper, it is preferable that the carrier member 500 is detached from the nanofiber web 121.

7A to 7C are conceptual cross-sectional views illustrating a method of manufacturing a moisture-permeable and waterproof fabric according to a second embodiment of the present invention.

7A to 7C, a method of manufacturing a moisture-permeable and waterproof fabric having improved adhesive strength according to a second embodiment of the present invention includes forming a solid-state hot-melt adhesive pattern 131 on a second fabric substrate 130 7a). The porous substrate 120, the hot melt web 110, and the first fabric substrate 100 are sequentially stacked on the second fabric substrate 130 on which the solid-state hot-melt adhesive pattern 131 is formed (FIG. 7B). Thereafter, the hot-melt web 110 and the solid-state hot-melt adhesive pattern 131 are fused to bond the first fabric substrate 100 and the porous substrate 120, and the porous substrate 120 and the second fabric substrate 130 to thermal bonding (Fig. 7C).

The hot-melt web 110 and the solid-state hot-melt adhesive pattern 131 are preferably melted simultaneously, and the melting points of the hot-melt web 110 and the solid-state hot-melt adhesive pattern 131 are preferably the same.

Here, the heat-bonding step includes a first fabric substrate 100, a hot-melt web 110, a porous substrate 120, a solid-state hot-melt adhesive pattern 131, and a second fabric substrate 130, And the solid hot melt adhesive pattern 131 is melted by the heat applied from the rollers 251 and 252 to melt the first fabric base material 100 and the first hot melt adhesive pattern 131. [ The porous substrate 120, and the porous substrate 120 and the second fabric substrate 130 are preferably thermally bonded.

Fig. 8 is a schematic configuration diagram of an electrospinning apparatus for producing a nanofiber web according to the present invention.

The electrospinning apparatus of the present invention comprises a mixing tank 10 in which a spinning solution in which a polymer material and a solvent are mixed is stored, and a high voltage generator connected to the mixing tank 10 to connect the nanofiber web 70 And a collector 50 disposed below the plurality of spinning nozzles 21, 22 and 23 and sequentially stacking the nanofiber web 70. The spinning nozzle 21,

The mixing tank 10 is equipped with a stirrer 11 that mixes the spinning solution uniformly and uses a pneumatic mixing motor 12 as a driving source to maintain the spinning solution at a predetermined viscosity.

In the present invention, air is jetted for each of a plurality of spinning nozzles (21, 22, 23), and air is trapped and accumulated in the nanofibers, whereby a highly rigid nanofiber web can be manufactured. .

A high voltage electrostatic force of 90 to 120 Kv is applied between the collector 50 and the plurality of spinning nozzles 21, 22 and 23 so that the nanofibers 30 are emitted to collect the nanofibers 30 in the collector, 70 are formed. The collector 50 may be a conveyor that automatically transfers the transfer sheet so that the nanofiber web 70 is formed on the transfer sheet (not shown), and a transfer sheet A roll (not shown) is disposed to supply the transfer sheet to the upper surface of the collector 50. A pressing roll (not shown) capable of flattening the surface by pressing (calendering) the nanofiber web 70 may be provided at the rear of the collector 50.

Therefore, in the present invention, by spinning the nanofibers using a transfer sheet, the residual solvent contained in the porous nanofiber web is absorbed, thereby preventing the nanofibers from being melted again by the residual solvent, and the amount of the residual solvent So that it can be appropriately adjusted.

The transfer sheet may be made of, for example, a nonwoven fabric made of a polymer material which is not dissolved by a solvent contained in the paper or a spinning liquid used for spinning, or a polyolefin film such as PE or PP. When the porous nanofiber web itself is used alone, it is difficult to carry out the drying process, the calendering process, and the winding process while being conveyed at a high conveying speed because the tensile strength is low.

Furthermore, after the porous nanofiber web is manufactured, the thermal bonding process with the fabric substrate is difficult to be continuously performed at a high feed rate. However, when the above-mentioned transfer sheet is used, sufficient tensile strength is provided, have.

In addition, when only a porous nanofiber web is used, electrostatic phenomenon is caused to adhere to other objects, resulting in poor workability. However, such a problem can be solved when a transfer sheet is used. The transfer sheet is peeled off after a thermal bonding process with the fabric substrate.

In addition, in the present invention, the porous nanofibrous web having a low weight is thermally bonded to the fabric base material, so that the moisture permeable and waterproof effect of the fabric can be improved, and a lightweight fabric can be realized.

In the present invention, the electrospinning apparatus for producing the nanofiber web shown in FIG. 8 is a method of electrospinning a spinning solution mixed with a hot-melt material and a solvent to form a hot-melt web of a web having pores in which hot- .

Figure 9 is a schematic block diagram of an apparatus for forming a solid hot melt adhesive pattern on a textile substrate in accordance with the present invention.

9, an apparatus for forming a solid hot melt adhesive pattern on a fabric substrate includes heating rolls 310 and 311, a coating roll 320, a feed nozzle 330, a heating tunnel 350, cooling rolls 361 and 362, Rolls 371, 372, 373, and 374, and a take-up roll 380. [

The heating rolls 310 and 311 raise the temperature of the fabric substrate 100 before the hot melt adhesive is coated so that the coating of the hot melt adhesive powder in the coating roll 320 is smooth.

A plurality of gravure coating holes (not shown) spaced apart from each other on the roll surface are formed on the coating roll 320. Hot melt adhesive powder sprayed from the supply nozzle 330 is inserted into the holes for gravure coating and is seated. At this time, when the fabric substrate 100 is rolled on the coating roll 320, the hot-melt adhesive powder deposited on the gravure coating hole is transferred onto the fabric substrate 100 and coated. The coating roll 320 may also be coated with a hot-melt adhesive powder while being heated to a predetermined temperature. Here, the size of the hot-melt adhesive powder is preferably from 1 탆 to 100 탆, more preferably from 20 탆 to 30 탆. The size of the hole for gravure coating is designed to be larger than the size of the hot-melt adhesive powder so that the hot-melt adhesive powder can be adhered well to the hole for gravure coating. In addition, the hot-melt adhesive powder may be designed to be placed in the hole for gravure coating in a one-to-one correspondence with the hole for gravure coating.

The heating tunnel 350 passes through the fabric substrate 100 coated with the hot-melt adhesive powder to improve the adhesive strength between the hot-melt adhesive powder and the fabric substrate 100.

The cooling rolls 361 and 362 are formed with through holes at the center and cooling water is allowed to flow through the through holes to allow the hot melt adhesive coated on the fabric substrate 100 when the fabric substrate 100 is rolled on the cooling rolls 361 and 362 Allow the powder to cool to a solid state.

The guide rolls 371, 372, 373, and 374 guide the fabric substrate 100 to be planarized, and the fabric substrate 100 is wound on the take-up roll 380.

First, the fabric substrate 100 is supplied to the heating rolls 310 and 311, heated in the heating rolls 310 and 311, and then heated in the coating rolls 320 and 320. [ The hot-melt adhesive powder is coated on the fabric substrate 100 in a pattern. At this time, a large number of holes for gravure coating are formed on the coating roll 320, and the hot-melt adhesive powder injected from the supply nozzle 330 is inserted into the holes for gravure coating.

At this time, the fabric substrate 100 is supplied with the coating roll 320, and the hot-melt adhesive powder inserted in the gravure coating hole is transferred onto the fabric substrate 100 and coated while the coating roll 320 is rolled. Then, the fabric base material 100 coated with the hot-melt adhesive powder is passed through the heating tunnel 350 to increase the adhesive strength of the hot-melt adhesive powder adhered to the fabric base material 100. The fabric base material 100 having passed through the heating tunnel 350 is then rolled to the cooling rolls 361 and 362 and the hot melt adhesive powder passed through the heating tunnel 350 is cooled to a solid state. That is, in the cooling rolls 361 and 362, the hot-melt adhesive powder is cooled and becomes a solid state, and a solid hot-melt adhesive pattern is formed on the fabric substrate 100. Thereafter, the fabric base material 100 is wound on the winding roll 380 through guide rolls 371, 372, 373 and 374.

Fig. 10 is a view showing a calender roll type apparatus for adhering a fabric base material and a porous base material to a solid-state hot-melt web according to the present invention, and Fig. 11 is a plan view Fig. 7 is a view showing a configuration of a laminating type apparatus.

In the present invention, the process of melting the hot melt web interposed between the fabric substrate and the porous substrate to bond the fabric substrate and the porous substrate is performed in a calender roll type apparatus as shown in Fig. 10 or a flat laminating type apparatus as shown in Fig. 11 .

That is, in the process using the calender roll type apparatus, the fabric substrate 1201a, the solid-state hot-melt web 1202a, and the porous substrate 1203a, which are wound around the first to third supply rolls 1201, 1202, 1203, 1211, 1222, and 1223 and driving rolls 1231 and 1232 and fed to calender rolls 1253a and 1253b to which heat is applied.

Thereafter, the solid-state hot-melt web 1202a is melted by the heat applied from the calender rolls 1253a and 1253b and then melted by the cold wind applied by the cooling fan 1270 while rolling on the driving rolls 1261, 1262, The hot-melt hot-melt web 1202a is cooled and adhered to the fabric base material 1201a and the porous base material 1203a, and then wound up by a winding roll 1280. [

Here, when the solid-state hot-melt web 1202a is melted, the solid-state hot-melt web 1202a to which the cloth base material 1201a and the surface of the porous substrate 1203a are contacted and infiltrates and the cold air is applied is cooled in the melted state, 1201a and the porous substrate 1203a so that the solid hot-melt web 1202a sandwiched between the fabric substrate 1201a and the porous substrate 1203a is melted and cooled to form the fabric substrate 1201a and the porous substrate 1203a ) Can be adhered.

The process in the flat laminate type apparatus uses a flat plate heating and cooling apparatus 1295. First, the cloth base material 1291a wound on the fourth to sixth supply rolls 1291, 1292, And feeds the solid hot melt web 1292a and the porous substrate 1293a to the heating and cooling tunnel 1295a of the heating and cooling device 1295. [ At this time, the fabric substrate 1291a, the solid-phase hot-melt web 1292a, and the porous substrate 1293a are fed into the heating and cooling tunnel 1295a in a stacked state.

On the other hand, a heater 1295b, a pressing roll 1295c, and a cooler 1295d are sequentially disposed in the heating and cooling tunnel 1295a from the inlet to the outlet.

Therefore, when the laminated structure of the fabric substrate 1291a, the solid hot melt web 1292a and the porous substrate 1293a is passed through the heating and cooling tunnel 1295a, a melting, pressing and cooling process is performed to form the fabric substrate 1291a and The porous substrate 1293a is bonded by the solid-phase hot-melt web 1292a.

That is, feeding the stacked fabric substrate 1291a, the solid hot melt web 1292a, and the porous substrate 1293a to the entrance of the heating and cooling tunnel 1295a results in the formation of a fabric substrate 1291a stacked by a conveyor belt 1294 , The solid-state hot-melt web 1292a and the porous substrate 1293a pass through the heating and cooling tunnel 1295a. At this time, the heat of the heater 1295b located at the inlet region of the heating and cooling tunnel 1295a first melts the solid-state hot-melt web 1292a, and thereafter, Solid hot melt webs 1292a to the fabric substrate 1291a and the porous substrate 1291a by laminating the laminate structure with the roll 1295c and cooling the laminate structure with the cooler 1295d installed in the exit region of the heating and cooling tunnel 1295a, 1293a.

The moisture permeable waterproof fabric 1296 of the present invention bonded to the fabric substrate 1291a and the porous substrate 1293a in the heating and cooling tunnel 1295a with the solid hot melt web 1292a is then wound.

For reference, in the calender roll type apparatus shown in Fig. 10, the process proceeds from the left side to the right side, and in the flat laminating type apparatus of Fig. 11, the process proceeds from the right side to the left side.

12 and 13 are test reports showing the water pressure and moisture permeability evaluation results of the moisture-permeable and waterproof fabric according to the embodiment of the present invention.

First, a first moisture permeable waterproof fabric sample (Test Report # 1) according to an embodiment of the present invention to be subjected to water pressure and moisture permeability evaluation was prepared by electrospinning a 5 gsm PVDF nanofiber web, A 10 grams polyamide hot melt web was bonded to a denier dewspo fabric (first fabric base) using a hot calender roll at 120 deg. C, and then a 20 denier tricot fabric Fabric substrate) was bonded to the nanofiber web by applying 10 gms of polyamide hot melt web at 120 캜.

The second moisture permeable and waterproof fabric samples (Test Report # 2) according to the embodiment of the present invention were prepared in the same manner as the first moisture permeable and waterproof fabric samples (Test Report # 1) described above, and the bonding temperature was changed to 130 캜 .

At this time, the polyamide hot melt web used was a product having a melting temperature of 110 ° C and a melt index of 30 cm 3/10 min.

The first water permeable fabric sample (Test Report # 1) and the second moisture permeable test fabric sample (Test Report Certificate # 2) thus manufactured were subjected to the water pressure test in accordance with ISO 811: 1981, Was increased to 60 cm H ₂ O / min.

The moisture permeability was measured by JIS L 1099: 2012, A-1 method. The area of the moisture permeable cup was 0.00283 m 2, the height of the moisture permeable cup was 25 mm, the moisture absorbent was CALCIUM CHLORIDE (CaCl 2), the temperature was 40 ± 2 ° C, 90 ± 5%.

As a result of the test report evaluation by FITI (Friend of Industry Technology Information), both the first breathable waterproof fabric sample (Test Report # 1) and the second breathable waterproof fabric sample (Test Report # 2) It can be seen that the moisture-permeable and waterproof fabric of the present invention is superior to the conventional fabric.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the embodiments set forth herein. Various changes and modifications may be made by those skilled in the art.

The present invention provides a moisture-permeable and waterproof fabric capable of preventing a peeling phenomenon by thermally adhering a porous substrate to a fabric base material with a hot-melt web and a solid-phase hot-melt adhesive pattern, increasing moisture permeability and achieving uniformized moisture permeability.

100, 130: fabric base 110: hot melt web
111: Fiber 112: Porosity
120: porous substrate 121: nanofiber web
121a: Nano fiber 251, 252: Roller
310,311: Heating roll 330: Feed nozzle
350: Heating tunnel 361,362: Cooling roll
371, 372, 373, 374: guide roll 380:

Claims (21)

A first fabric substrate;
A hot melt web adhered to the first fabric substrate and having a plurality of pores;
A porous substrate having one surface bonded to the hot melt web and having a plurality of pores;
A solid-phase hot melt adhesive pattern or hot-melt web adhered to the other surface of the porous substrate; And
And a second fabric base on which the solid hot melt adhesive pattern is formed; and a breathable waterproof fabric capable of improving the bonding strength. The moisture-permeable waterproof fabric according to claim 1, wherein the solid-state hot-melt adhesive pattern is a dot-shaped pattern made of solid hot-melt adhesive powder spaced apart from each other. The moisture-permeable waterproof fabric according to claim 2, wherein the hot-melt adhesive powder has a size of 1 mu m to 100 mu m and can improve the adhesive strength. The hot melt web of claim 1, wherein the hot melt web is made of one of polyamide hot melt, polyester hot melt, polyurethane hot melt, polyolefin hot melt and EVA (Ethylene Vinyl Acetate) hot melt Breathable waterproof fabric. The breathable waterproof fabric according to claim 1, wherein the melting point of the hot melt web is 150 DEG C or lower. The breathable waterproof fabric according to claim 1, wherein the hot melt web has a melt index of 5 to 500 cm 3/10 min. The moisture-permeable waterproof fabric according to claim 1, wherein the hot-melt web is a web having a plurality of pores in which fibers made of a hot-melt material are accumulated, and capable of improving adhesion strength. The breathable waterproof fabric according to claim 7, wherein the diameter of the fibers of the hot melt web is 10 to 100 占 퐉. The breathable waterproof fabric according to claim 7, wherein the accumulated amount of fibers in the hot melt web is 10 to 20 gsm. The moisture-permeable waterproof fabric according to claim 1, wherein the size of the pores of the hot-melt web is 100 to 10,000 m, and the adhesive strength can be improved. The breathable waterproof fabric of claim 1, further comprising a water soluble acrylic layer interposed between the second fabric substrate and the solid hot melt adhesive pattern. The breathable waterproof fabric according to claim 1, wherein the porous substrate is one of a nanofiber web, a nonwoven fabric, and a laminated structure thereof having a plurality of pores integrated by nanofibers and capable of improving adhesion strength. The breathable waterproof fabric of claim 1, wherein the weaving density of the second fabric substrate is less than the weave density of the first fabric substrate, which can improve the bonding strength. Melting the hot melt web to thermally adhere the first fabric substrate and the porous substrate;
Forming a solid hot melt adhesive pattern on the second textile substrate; And
And melting the solid hot melt adhesive pattern to thermally adhere the porous substrate to the second fabric base material. 15. The method according to claim 14, wherein the melting point of the hot-melt web and the solid-state hot-melt adhesive pattern are different from each other and the adhesive strength can be improved. 15. The method of claim 14, wherein the porous substrate is a nanofiber web,
Wherein the step of thermally bonding the first fabric substrate and the porous substrate comprises:
Forming a nanofiber web of nanofibers by electrospinning the spinning solution from the spinning nozzle with a carrier member;
Laminating the hot melt web and the first fabric substrate to the nanofiber web and calendering to thermally adhere the nanofiber web and the first fabric substrate to the hot melt web; And
Separating the carrier member from the nanofiber web; and removing the carrier member from the nanofiber web. 17. The method according to claim 16, wherein the carrier member is one of release paper, nonwoven fabric, and fabric. Forming a solid hot melt adhesive pattern on the second fabric substrate;
Sequentially laminating a porous substrate, a hot-melt web, and a first fabric substrate on the second fabric substrate on which the solid hot melt adhesive pattern is formed; And
Melting the hot melt web and the solid hot melt adhesive pattern to thermally adhere the first fabric base material and the porous base material and the porous base material and the second fabric base material to each other, A method of manufacturing a fabric. The method according to claim 18, wherein the hot-melt web and the solid-state hot-melt adhesive pattern are melted at the same time, whereby the adhesive strength can be improved. Feeding a laminated structure of a fabric substrate, a solid-state hot-melt web, and a porous substrate to a calender roll to which heat is applied;
Melting the solid hot melt web by heat applied in the calender roll and adhering it to the fabric substrate and the porous substrate; And
And cooling the solid-state hot-melt web adhered to the fabric substrate and the porous substrate by the cool air applied by the cooling fan. Preparing a heating and cooling device provided with a heating and cooling tunnel in which a heater, a pressing roll and a cooler are sequentially arranged from an inlet to an outlet;
Feeding a laminated structure of a fabric substrate, a solid hot melt web and a porous substrate to an inlet of the heating and cooling tunnel;
Melting the solid-state hot-melt web with heat of the heater;
Laminating the laminate structure with the squeeze roll; And
And cooling the laminated structure with the cooler.

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