JP2008121141A - Moisture-permeable waterproof fabric having highly foamed layer and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a moisture-permeable waterproof fabric having sufficient stereoscopic appearance and design on a moisture-permeable waterproof layer. <P>SOLUTION: The moisture-permeable waterproof fabric is produced by laminating and bonding a cloth, an adhesive layer, a highly foamed layer and a moisture-permeable waterproof layer in the order. The highly foamed layer is composed of a thermally expanded microcapsule, a synthetic resin to keep the microcapsule on the inner face of the moisture-permeable waterproof layer and a hydrophilic microporous silica fine powder on the surface of the microcapsule or in the synthetic resin. The moisture-permeable waterproof fabric having the highly foamed layer can be produced by forming a moisture-permeable waterproof layer on the surface of a releasing material, applying a synthetic resin solution containing a thermally expandable microcapsule and a hydrophilic and microporous silica fine powder to the surface of the moisture-permeable waterproof layer, drying the applied solution to form a synthetic resin layer, laminating and bonding a cloth to the synthetic resin layer interposing an adhesive layer, and expanding the thermally expandable microcapsule by heating the product. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a moisture-permeable and waterproof fabric having a high foam layer and a method for producing the same, and in particular, a transparent material having a high foam layer suitable for use as various clothing fabrics such as casual clothing, sports clothing, and mountaineering clothing. The present invention relates to a wet waterproof fabric and a method for producing the same.

  Conventionally, a moisture permeable waterproof fabric obtained by bonding a moisture permeable waterproof layer obtained by a wet coagulation method and the fabric through an adhesive layer is known. For example, in Patent Document 1, a polyurethane resin solution is applied on a release material, and this is wet-coagulated to form a moisture-permeable waterproof layer, and a polyurethane-based adhesive solution is applied on the moisture-permeable waterproof layer, A method of obtaining a moisture-permeable and waterproof fabric by laminating the fabric thereon is described.

  However, such a moisture-permeable and waterproof fabric is only inferior in three-dimensional effect and design because the moisture-permeable and waterproof layer and the fabric are simply bonded by the adhesive layer. In order to impart a stereoscopic effect and design to the moisture permeable waterproof fabric, a method of forming various patterns such as a dot pattern and a lattice pattern made of a synthetic resin on the surface of the moisture permeable waterproof layer, or a moisture permeable waterproof layer and a fabric. A method of forming various patterns made of a synthetic resin between the two is conceivable. However, in the former method, since various patterns are exposed on the surface, they may fall off or be damaged by friction during wearing or washing. Moreover, in the latter method, since various patterns exist inside, it may be difficult to express a sufficient three-dimensional effect and design.

  For this reason, in the latter method, even if it is inside, it is conceivable to increase the thickness of various patterns made of synthetic resin so that a sufficient three-dimensional effect and design can be expressed. However, increasing the thickness of various patterns increases the weight of the moisture-permeable and waterproof fabric, which is not preferable for casual clothing, sports clothing, mountaineering clothing, and the like. Further, if a foamed resin is used as the synthetic resin, an increase in weight can be suppressed. However, when the fabric and the moisture permeable waterproof layer are laminated and bonded, the foamed resin is crushed and the thickness is reduced, which is not preferable. Furthermore, it is conceivable to foam the foamed resin after laminating and bonding the fabric and the moisture permeable waterproof layer. However, since the foamed resin is fixed with an adhesive, sufficient foaming cannot be realized.

  By the way, as a prior application, the applicant of the present invention, even if the thermally expandable microcapsule is fixed and bound by the synthetic resin, the thermally expandable microcapsule and the hydrophilic and microporous silica fine powder are used. An invention based on the technical idea that if used together, the expansion of the thermally expandable microcapsules under heating is hardly inhibited (Patent Document 2).

JP-A-11-227143 (Claims) Japanese Patent Application No. 2006-9220 (Claims)

  Then, if the invention which concerns on this patent document 2 is utilized, I thought that the pattern and layer with a three-dimensional effect and design nature could be formed between a moisture-permeable waterproof layer and a fabric. That is, a synthetic resin solution containing thermally expandable microcapsules and hydrophilic and microporous silica fine powder described in Patent Document 2 is applied to the moisture permeable waterproof layer, and finally the fabric is laminated. After bonding, it was thought that if the thermally expandable microcapsules were expanded, a moisture-permeable and waterproof fabric with sufficient three-dimensional effect and design could be obtained. And when this inventor experimented under this idea, the moisture-permeable waterproof fabric excellent in a three-dimensional feeling was obtained by arranging a thermally expansible microcapsule on the inner surface of the moisture-permeable waterproof layer side. The present invention has been reached.

  That is, the present invention utilizes the invention according to Patent Document 2, and is laminated and bonded in the order of a fabric, an adhesive layer, a highly foamed layer, and a moisture permeable waterproof layer. Formed with expanded microcapsules, a synthetic resin for holding the microcapsules on the inner surface of the moisture permeable waterproof layer, and a hydrophilic and microporous silica fine powder present on the surface of the microcapsules or in the synthetic resin The present invention relates to a moisture-permeable and waterproof fabric provided with a highly foamed layer and a method for producing the fabric.

  In the present invention, as fabrics, those generally used as clothing materials such as woven fabrics, knitted fabrics, non-woven fabrics, and synthetic leathers can be suitably used. However, in this invention, you may use the cloth which can be used not only for the cloth as a raw material for clothes but for another use.

  Arbitrary thing is used also as a fiber which constitutes cloth. For example, polyamide synthetic fibers represented by nylon 6 and nylon 66, polyester synthetic fibers represented by polyethylene terephthalate, polyacrylonitrile synthetic fibers, polyvinyl alcohol synthetic fibers, semi-synthetic fibers such as triacetate, cotton, etc. Natural fibers can be used alone or in combination.

  One side or both sides of the fabric may be subjected to water repellent treatment. As the water repellent used for the water repellent treatment, known ones such as a paraffin water repellent, a polysiloxane water repellent, or a fluorine water repellent can be used. The water repellent treatment may be performed by a known method such as a padding method or a spray method. In particular, when good water repellency is required, padding (squeezing ratio 35%) with an aqueous dispersion of 5% by mass of a fluorine-based water repellent, for example, AG7000 (Asahi Glass Co., Ltd., fluorine-based water repellent emulsion). ), And a method of performing heat treatment at 150 to 170 ° C. for 30 seconds to 2 minutes may be employed.

  A highly foamed layer is bonded to one side or both sides of the fabric via an adhesive layer. The highly foamed layer is basically formed of a synthetic resin, thermally expanded microcapsules, and hydrophilic and microporous silica fine powder. Any synthetic resin can be used as long as it is adhesively bonded to the moisture permeable waterproof layer. For example, a synthetic resin used as a hot melt resin such as polyester or polyethylene, or a synthetic resin used as an adhesive such as polyurethane or polyvinyl acetate can be used. In the present invention, it is particularly preferable to use a crosslinked synthetic resin. Specifically, polyurethanes, polyesters, polyacryls, polyamides, polyethylene-vinyl acetates having so-called crosslinkability having reactive groups such as hydroxyl groups, isocyanate groups, amino groups, and carboxyl groups are self-crosslinked or isocyanate-based. Synthetic resins crosslinked with a crosslinking agent such as an epoxy or melamine can be used. When the moisture-permeable and waterproof fabric according to the present invention is used as a material for clothing, it is preferable that the high foam layer has a soft texture. Moreover, it is preferable to use a moisture-permeable and waterproof synthetic resin. From such a viewpoint, a water-soluble polyurethane resin having a hydroxyl group at the terminal obtained from the reaction of an isocyanate component composed of aromatic diisocyanate or aliphatic diisocyanate and a polyol component composed of polyethylene glycol, polytetramethylene glycol or the like as a main agent. A moisture-permeable and waterproof synthetic resin crosslinked with a hexamethylene diisocyanate-based crosslinking agent is preferable.

  The thermally expanded microcapsule is obtained by expanding a thermally expandable microcapsule under heating. Any thermally expandable microcapsule can be used as long as it is conventionally known. Specifically, the particle diameter is about 5 to 50 μm, and the outer shell is formed of a thermoplastic resin made of a polymer such as vinylidene chloride or acrylonitrile, and isobutane, isopentane, n-pentane is formed in the outer shell. Thermally expandable microcapsules in which low boiling point hydrocarbons such as are encapsulated can be used. Such thermally expandable microcapsules expand about 20 to 70 times in volume under heating at about 80 to 200 ° C. Therefore, the microcapsules thermally expanded in a completely free state have a particle diameter of about 13 μm to 2.1 mm.

  As the hydrophilic and microporous silica fine powder, any conventionally known fine powder can be used. For example, it is manufactured by a wet method (gel method, sedimentation method) or dry method, and has a hydrophilic and microporous silica fine powder having OH groups that are hydrophilic groups on the surface and a large number of pores. be able to. The particle diameter of the silica fine powder is about 0.01 to 200 μm, and particularly about 1 to 100 μm. In the present invention, when the silica fine powder has a particle size equal to or larger than the particle size of the thermally expandable microcapsule, the foamability is further improved. The reason for this is not clear, but it can be assumed that the gap between the silica fine powders is a gap that allows expansion of the thermally expandable microcapsules.

  The content ratio of each substance in the highly foamed layer is preferably the following ratio. That is, the thermally expanded microcapsule is preferably 3 to 50 parts by mass, more preferably 5 to 30 parts by mass with respect to 100 parts by mass of the synthetic resin. When the thermally expanded microcapsule is less than 3 parts by mass, the three-dimensional effect of the highly foamed layer tends to be poor. Even if the microcapsule exceeds 50 parts by mass, the stereoscopic effect does not change so much. The hydrophilic and microporous silica fine powder is preferably 3 to 50 parts by mass, more preferably 5 to 40 parts by mass with respect to 100 parts by mass of the synthetic resin. When the silica fine powder is less than 3 parts by mass, it tends to be difficult to improve the foamability of the thermally expandable microcapsules. Moreover, when a silica fine powder exceeds 50 mass parts, the tendency for a highly foamed layer to become hard will arise. Furthermore, the ratio of the thermally expanded microcapsules and silica fine powder is preferably microcapsules: silica fine powder = 1: 3 to 3: 1 (parts by mass). If the proportion of silica fine powder or microcapsules used is large beyond this range, the foamability of the thermally expandable microcapsules tends to be difficult to improve.

  The highly foamed layer may be laminated and bonded to the entire inner surface of the moisture-permeable and waterproof layer, or may be laminated and bonded as a pattern in a pattern. When used as a material for clothing, it is preferable from the viewpoint of fashionability and design to be laminated in a pattern. The pattern shape can be any pattern, but it has a uniform pattern or a random pattern, such as a dot, grid, line, diagonal, pyramid, turtle shell, or a specific trademark pattern. It is preferable that the design has an attractive appearance that easily exhibits design properties such as the above. Further, the area occupied by the pattern-like pattern with respect to the inner surface of the moisture-permeable and waterproof layer is preferably in the range of 5 to 90%, more preferably in the range of 10 to 80%. When the occupied area is less than 5%, there is a tendency that the three-dimensional effect is poor and it is difficult to obtain an excellent design. Further, when the occupied area exceeds 90%, the texture tends to become hard.

  Any adhesive can be used as long as it is a conventionally known adhesive for bonding the highly foamed layer to the fabric surface. Specifically, synthetic rubber such as natural rubber, nitrile rubber, chloroprene rubber, vinyl acetate resin, acrylic resin, polyamide resin, polyester resin, ethylene-vinyl acetate copolymer resin, polyurethane resin, etc. These can be used alone or in combination. In particular, it is preferable to use a curable adhesive from the viewpoint of adhesion durability and a design property that a sufficient three-dimensional effect on the moisture-permeable and waterproof layer side (that is, the outer layer side) can be expressed. For example, polyurethanes, polyesters, polyamides, polyethylene-vinyl acetate, etc. that have reactive groups such as hydroxyl groups, isocyanate groups, amino groups, carboxyl groups, etc., are self-cross-linked, or isocyanate-based, epoxy-based cross-linked It is preferable to crosslink with the agent to make the adhesive curable. Among these, polyurethane resin adhesives are particularly preferable because they are flexible and have excellent moisture permeability.

  The layer (adhesive layer) made of an adhesive may be provided on the entire surface of the fabric, or may be partially provided in the form of dots. The thickness of the adhesive layer may be about 5 to 100 μm, preferably 10 to 80 μm, and more preferably 20 to 50 μm. If the thickness is less than 5 μm, the adhesive strength is poor, and even if the thickness exceeds 100 μm, the degree of improvement in the adhesive strength is small, and the moisture-permeable waterproof fabric obtained is likely to have problems of deterioration in moisture permeability and texture hardening. When the adhesive layer is provided in the form of dots, the diameter of each point is preferably about 1 mm or less, and the occupied area of all points is preferably 30% or more. Such a point-like adhesive layer can finally give a good design to the moisture-permeable and waterproof fabric.

  A moisture permeable waterproof layer is bonded to the surface side of the highly foamed layer (the side opposite to the adhesive layer side). As the moisture permeable waterproof layer, conventionally known moisture permeable and waterproof resin films can be used. Specifically, a microporous resin film or a nonporous resin film made of polyurethane resin, polyamino acid urethane resin, acrylic resin, polyester resin, polytetrafluoroethylene resin, or the like can be used. The moisture permeable waterproof layer generally uses one of these resin films, but two or more resin films may be laminated to form a moisture permeable waterproof layer. For example, the moisture permeable waterproof layer may be formed by combining microporous membranes, nonporous membranes, or a combination of microporous membranes and nonporous membranes.

  The thickness of the moisture permeable waterproof layer is preferably 10 to 100 μm and more preferably 15 to 70 μm when a microporous film is used as the resin film. If the thickness is less than 10 μm, the waterproof property tends to be insufficient, and if it exceeds 100 μm, the texture is hard and the moisture permeability tends to be insufficient. Moreover, when a nonporous film is used as the resin film, 5 to 30 μm is preferable, and 8 to 20 μm is more preferable. If the thickness is less than 5 μm, the waterproof property tends to be insufficient, and if it exceeds 30 μm, the moisture permeability tends to be insufficient.

  In the present invention, it is preferable to use a nonporous resin film as the moisture-permeable waterproof layer. When the nonporous resin film is used, the moisture-permeable waterproof layer can be thinned, and the foaming of the highly foamed layer is hardly inhibited, and the visibility of the highly foamed layer from the outside is also improved. In particular, when a cosmetic effect is imparted by adding a pigment, filler, or the like to the highly foamed layer, this cosmetic effect can be seen well through the nonporous film.

The moisture permeable and waterproof layer is the outermost layer and directly comes into contact with the body part and the inner, causing friction, so that it is slippery from the viewpoint of wearability and wear durability, and soft touch, dry touch, etc. It is preferable that the touch feeling is excellent. To improve the lubricity and touch feeling, for example, a resin film or the resin film surface, silicone compounds such as polydimethylsiloxane, silk powder of sericin such as N ^e - amino acid based fine powder such as lauroyl -L- lysine Body, wool powder, cellulosic powder, heat-resistant organic filler fine powder, etc. may be contained or adhered.

  The moisture-permeable waterproof fabric provided with the highly foamed layer according to the present invention is formed by forming a moisture-permeable waterproof layer on the surface of the release material, and then, on the moisture-permeable waterproof layer, a thermally expandable microcapsule, After applying a synthetic resin solution containing porous silica fine powder, drying to form a synthetic resin layer, and then laminating and laminating a fabric on the synthetic resin layer via an adhesive layer It can be suitably obtained by a method of expanding the thermally expandable microcapsule under heating. This method will be specifically described as follows. First, a release material such as release paper, release film or release cloth is prepared. And a moisture-permeable waterproof layer is formed in the surface of this mold release material. In order to form the moisture permeable waterproof layer, a conventionally known method may be employed using the above-described resin for forming the moisture permeable waterproof layer. For example, a dry coating method in which a resin liquid for forming a moisture permeable waterproof layer is applied using a comma coater or a knife coater and dried to form a nonporous resin film can be employed. In addition, after applying the moisture-permeable waterproof layer forming resin liquid in the same manner, the resin is solidified with a coagulating liquid such as water, and then a wet coating method is employed in which a microporous resin film is formed by washing with water and drying. Can do. Further, a melt extrusion method in which the above-mentioned resin forming the moisture permeable waterproof layer is melted and extruded from a T die to form a nonporous resin film can be employed.

  After forming the moisture permeable waterproof layer, a synthetic resin solution containing thermally expandable microcapsules and hydrophilic and microporous silica fine powder is applied onto this layer. The kind and amount of synthetic resin in the synthetic resin solution, the kind and amount of thermally expandable microcapsules, and the amount of hydrophilic and microporous silica fine powder added are as described above. This synthetic resin solution is applied to the surface of the moisture permeable waterproof layer. This application may be applied to the entire surface of the moisture permeable waterproof layer or may be applied in a pattern. As a coating method, a comma coating method, a roll-on knife coating method, a gravure coating method, a screen printing method, or the like may be employed. After the application, the synthetic resin solution is dried to solidify the synthetic resin. When the synthetic resin is a crosslinkable synthetic resin, it may be crosslinked at this stage or may be in an uncrosslinked state. As described above, the synthetic resin is solidified to form the synthetic resin layer.

  After forming the synthetic resin layer, the synthetic resin layer and the fabric are bonded together via an adhesive layer. As the adhesive, those described above can be used. There are the following methods for forming the adhesive layer. For example, an emulsion-type or solvent-type adhesive liquid may be applied and dried using a comma coater, a gravure coater, or the like on the entire surface of the synthetic resin layer or the fabric surface or partially in the form of dots. In the case of a hot melt type adhesive, it is melted and applied to the entire surface or part of the surface of the synthetic resin layer or fabric using a T-die or gravure coater, and then cooled and solidified. do it. In addition, when the synthetic resin layer is formed in a pattern, when the adhesive layer is formed on the synthetic resin layer surface, the adhesive layer is formed on the moisture permeable waterproof layer surface at a location outside the pattern of the synthetic resin layer. Will be formed.

  As described above, after obtaining a laminate laminated and laminated in the order of the moisture permeable waterproof layer, the synthetic resin layer, the adhesive layer, and the fabric, when this laminate is heated, the thermal expansibility in the synthetic resin layer The microcapsule expands and the synthetic resin layer becomes a highly foamed layer. In the present invention, since the heat-expandable capsule and the hydrophilic and microporous silica fine powder coexist in the synthetic resin layer, the heat-expandable capsule is sufficiently expanded without being inhibited, Thereby, a highly foamed layer is obtained. As described above, a moisture-permeable and waterproof fabric provided with the highly foamed layer according to the present invention is obtained.

  In the present invention, a synthetic resin layer is formed using a synthetic resin solution containing a thermally expandable microcapsule and a hydrophilic and microporous silica fine powder, so that the thermally expandable microcapsule is excellent under heating. Inflate. Although this principle is not clear, the present inventor presumes as follows. That is, when only the thermally expandable microcapsules are mixed in the synthetic resin solution, the thermally expandable microcapsules are not likely to be unevenly distributed in a partially dense state after the synthetic resin solution is applied to the moisture permeable waterproof layer surface. I guess. On the other hand, when the hydrophilic and microporous silica fine powder coexists in the synthetic resin solution, the thermally expandable microcapsules are less likely to be unevenly distributed and relatively uniformly dispersed in the synthetic resin layer. I guess it exists in a rough state. As a result, the thermally expandable microcapsules exist in a relatively free state, and it is assumed that they may expand smoothly.

  Therefore, the synthetic resin layer obtained using the synthetic resin solution containing the thermally expandable microcapsule and the hydrophilic and microporous silica fine powder is highly foamed and rich in three-dimensional effect. Therefore, even if a highly foamed layer exists between the fabric and the moisture permeable waterproof layer, the three-dimensional effect is expressed to the outside through the moisture permeable waterproof layer. The effect is that an excellent moisture-permeable and waterproof fabric can be obtained.

  EXAMPLES Hereinafter, although this invention is demonstrated based on an Example, this invention is not limited to an Example. In the present invention, when a thermally expandable microcapsule and a hydrophilic and microporous silica fine powder coexist in a synthetic resin layer, the expansion of the thermally expandable microcapsule under heating is difficult to be inhibited. It should be understood as being based on the technical idea that a good three-dimensional effect can be obtained if it exists inside the moisture-proof layer.

Example 1
[Preparation of release material]
Nylon multifilaments of 78 dtex / 48 filaments were used for both the warp and the weft, and a taffeta with a warp density of 115 / 2.54 cm and a weft density of 100 / 2.54 cm was woven. After scouring this taffeta by a usual method, soft silicone 150 (Daiichi Kogyo Seiyaku Co., Ltd., silicone emulsion) 2 mass% and AG950 (Asahi Glass Co., Ltd., fluorine-based water repellent emulsion) 7 mass% % Was mixed with a mixed emulsion solution (squeezing ratio 35%), dried, and then heat treated at 170 ° C. for 1 minute. Subsequently, using a calendar processing machine having a mirror roll, crushing was performed under the conditions of a temperature of 180 ° C., a pressure of 300 kPa, and a speed of 20 m / min to obtain a release cloth.

[Preparation of moisture permeable waterproof layer forming solution]
A solution for forming a moisture permeable waterproof layer having the composition shown in Formula 1 below was prepared. The solid content concentration of this solution was 25% by mass, and the viscosity of the solution was 15000 mPa · s at 25 ° C.
<Prescription 1>
Rezamin CU4821 100 parts by mass
(Ester-based polyurethane resin manufactured by Dainichi Seika Kogyo Co., Ltd.)
7 parts by mass of calcium carbonate (# 400) (manufactured by Nitto Flour Chemical Co., Ltd.)
Resamine X cross-linking agent 1 part by mass (Daiichi Seika Kogyo Co., Ltd., isocyanate compound)
Dirac color L-1500 5 parts by mass (Dainippon Ink & Chemicals, white colorant)
N, N-dimethylformamide 30 parts by mass

[Preparation of synthetic resin solution]
A synthetic resin solution having the composition shown in Formula 2 below was prepared. In addition, the solid content concentration of this synthetic resin solution was 22 mass%, and the viscosity of the synthetic resin solution was 1500 mPa · s at 25 ° C.
<Prescription 2>
Heimlen Y128NS 100 parts by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., solvent-permeable polyurethane resin with moisture permeability)
Rezamin X 1 part by mass (produced by Daiichi Seika Kogyo Co., Ltd., isocyanate compound)
3 parts by mass of microsphere H755D (manufactured by Dainichi Seika Kogyo Co., Ltd., thermal expansion microcapsules with an average particle size of about 20 μm and a foaming temperature of 140 to 170 ° C.)
3 parts by mass of silica powder RA (B70) (manufactured by Fuji Silysia Chemical Ltd., silica fine powder having an average particle size of about 70 μm)
Seika Seven X-2194 Red 3 parts by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., red colorant)
Methyl ethyl ketone 20 parts by mass Toluene 20 parts by mass

[Preparation of adhesive liquid]
An adhesive solution having the composition shown in Formula 3 below was prepared. In addition, the solid content concentration of this adhesive liquid was 36 mass%, and the viscosity of the synthetic resin solution was 2500 mPa · s at 25 ° C.
<Prescription 3>
Heimlen B-11 2NS 100 parts by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., moisture-permeable polyurethane resin adhesive)
Rezamin NE crosslinking agent 8 parts by mass (produced by Daiichi Seika Kogyo Co., Ltd., isocyanate compound)
Rezamin HI-299 2 parts by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., crosslinking accelerator)
Methyl ethyl ketone 20 parts by mass Toluene 20 parts by mass

[Preparation of fabric]
Using 78 dtex / 68 filament nylon multifilament for the warp and 78 dtex / 68 filament nylon multifilament for the weft, a warp density of 180 / 2.54 cm, a weft density of 75 / 2.54 cm Two twills were woven. This twill was subjected to scouring and dyeing (Nippon Kayaku Co., Ltd., Kayanol Blue NR 1% omf) by a conventional method, and then Asahi Guard AG-7000 as an emulsion type fluorine-based water repellent. (Asahi Glass Co., Ltd.) was padded with an aqueous dispersion in which 6% was dispersed (drawing ratio 45%), dried, and then heat treated at 170 ° C. for 40 seconds to obtain a fabric.

[Formation of moisture-permeable waterproof layer on release material]
The moisture-permeable and waterproof layer-forming solution of <Prescription 1> is applied to the crushing surface of the release material with a comma coater at an application amount of 120 g / m ² (dry resin application amount of 30 g / m ² ), and immediately 25 ° C. Was immersed in water for 1 minute to perform wet coagulation. Then, after washing with hot water at 50 ° C. for 5 minutes, a microporous resin film having an average thickness of 50 μm was formed by drying at 130 ° C. for 2 minutes to obtain a moisture permeable waterproof layer.

[Formation of synthetic resin layer on moisture permeable waterproof layer]
Next, a gravure roll (5 lines / 25.4 mm, line width: 1 mm, depth: 0.15 mm, grid line occupation) in which a synthetic resin solution of <Prescription 2> is engraved in a grid line form on a moisture-permeable waterproof layer A lattice-shaped synthetic resin layer containing about 10% by mass of thermally expandable microcapsules was formed by coating at a rate of about 20% and drying at 120 ° C. for 1 minute.

[Formation of adhesive layer on synthetic resin layer]
After forming the lattice-shaped synthetic resin layer, the adhesive liquid of <Prescription 3> was applied onto the synthetic resin layer at a coating amount of 38 g / m ² using a comma coater. The adhesive solution was applied on the lattice-shaped synthetic resin layer, and was applied on the moisture-permeable waterproof layer in the absence of the lattice. Then, drying was performed at 130 ° C. for 1 minute to form an adhesive layer having an average thickness of 13 μm.

[Fabric bonding]
Immediately after forming the adhesive layer, the fabric is laminated on the adhesive layer, laminated at a pressure of 200 kPa, and laminated in the order of release agent, moisture permeable waterproof layer, synthetic resin layer, adhesive layer, and fabric. A laminated laminate was obtained.

[Formation of highly foamed layer]
After the laminate is aged at 40 ° C. for 3 days, the release material is peeled off, and then the set processing is performed on the heat setter machine under the condition of 170 ° C. × 1 minute while also heating and foaming the thermally expandable microcapsules. went. By this set processing, the synthetic resin layer became a highly foamed layer, and a moisture-permeable and waterproof fabric provided with the highly foamed layer was obtained.

Example 2
[Preparation of moisture permeable waterproof layer forming solution]
A solution for forming a moisture permeable waterproof layer having the composition shown in the following formulation 4 was prepared. The solid content concentration of this solution was 22% by mass, and the viscosity of the solution was 3000 mPa · s at 25 ° C.
<Prescription 4>
Heimlen T-21-1 100 parts by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., moisture-permeable polyurethane resin)
Seika Seven DUT4093 White 10 parts by mass (Daiichi Seika Kogyo Co., Ltd., white pigment)
Methyl ethyl ketone 15 parts by mass N, N-dimethylformamide 15 parts by mass

[Formation of moisture-permeable waterproof layer on release material]
Using a release paper (EV130TPD) manufactured by Lintec as a release material, the moisture permeable waterproof layer forming solution of <Prescription 4> is applied onto the release surface with a comma coater at an application amount of 45 g / m ² . Then, it was dried at 100 ° C. for 2 minutes to form a 10 μm-thick nonporous resin film to obtain a moisture permeable waterproof layer.
Thereafter, in the same manner as in Example 1, [Formation of synthetic resin layer on moisture-permeable waterproof layer], [Formation of adhesive layer on synthetic resin layer], [Fabric bonding] and [High Formation of Foam Layer] was performed to obtain a moisture-permeable and waterproof fabric having a high foam layer.

Example 3
[Preparation of lubricity-imparting agent]
The slipperiness | lubricity imparting agent of the composition shown to the following prescription 5 was prepared. In addition, the solid content concentration of this slipperiness | lubricity imparting agent was 19 mass%, and the viscosity was 3500 mPa * s under 25 degreeC.
<Prescription 5>
Heimlen C-61 100 parts by mass (made by Dainichi Seika Kogyo Co., Ltd., moisture-permeable polyurethane resin)
NP fiber W10-MG2 12 parts by mass (Nippon Paper Chemical Co., Ltd .: Cellulose-based lubricity improver)
30 parts by mass of methyl ethyl ketone

In Example 2, after the release material was peeled off at the time of [formation of a highly foamed layer], the slipperiness imparting agent shown in <Prescription 5> was applied at a coating amount of 20 g / m ² using a knife coater. A moisture permeable and waterproof fabric having a highly foamed layer was obtained in the same manner as in Example 2 except that a step of forming a dry touch thin film having an average thickness of 4 μm was added by drying at 100 ° C. for 1 minute. .

Comparative Example 1
In Example 1, [Formation of synthetic resin layer on moisture-permeable and waterproof layer] was omitted, and moisture-permeable and water-release property was the same as Example 1 except that an adhesive layer was formed on the moisture-permeable and waterproof layer. A fabric was obtained.

Comparative Example 2
In Example 2, [Formation of synthetic resin layer on moisture-permeable waterproof layer] was omitted, and moisture-permeable water-release property was the same as Example 2 except that an adhesive layer was formed on the moisture-permeable waterproof layer. A fabric was obtained.

Comparative Example 3
In Example 1, a moisture-permeable and waterproof fabric was obtained in the same manner as in Example 1 except that a synthetic resin solution not containing Microsphere H755D was used as the synthetic resin solution of <Prescription 2>.

Comparative Example 4
In Example 2, a moisture-permeable and waterproof fabric was obtained in the same manner as in Example 2 except that a synthetic resin solution not containing Microsphere H755D was used as the synthetic resin solution of <Prescription 2>.

Comparative Example 5
[Formation of synthetic resin layer on fabric]
A gravure roll (5 lines / 25.4 mm, line width: 1 mm, depth: 0.15 mm, grid line occupancy: about 20%) engraved on the fabric with the synthetic resin solution of <Prescription 2> in a grid line shape And then dried at 120 ° C. for 1 minute to form a lattice-shaped synthetic resin layer containing about 10% by mass of thermally expandable microcapsules.

[Formation of adhesive layer on moisture permeable waterproof layer]
The moisture-permeable and waterproof layer-forming solution of the above <Prescription 4> was applied to the crushing surface of the release material used in Example 1 with a comma coater at an application amount of 45 g / m ² , and then ² at 100 ° C. By drying for 10 minutes, a 10 μm-thick nonporous resin film was formed to obtain a moisture-permeable and waterproof layer. The adhesive solution of the above <Prescription 3> was applied onto this moisture permeable waterproof layer at a coating amount of 38 g / m ² using a comma coater. The adhesive liquid was applied to the entire surface of the moisture permeable waterproof layer. Then, drying was performed at 130 ° C. for 1 minute to form an adhesive layer having an average thickness of 13 μm.

The fabric synthetic resin layer obtained in [Formation of synthetic resin layer on fabric] is brought into contact with the adhesive layer obtained in [Formation of adhesive layer on moisture permeable waterproof layer]. Then, the laminate was laminated at a pressure of 200 kPa to obtain a laminate in which a release material, a moisture permeable waterproof layer, an adhesive layer, a synthetic resin layer, and a fabric were laminated and bonded in this order. The laminate was aged at 40 ° C. for 3 days, and then the release material was peeled off. The slipperiness-imparting agent shown in <Prescription 5> was applied to the moisture-permeable waterproof layer at a coating amount of 20 g / m ² using a knife coater. Then, a dry touch thin film having an average thickness of 4 μm was formed by drying at 100 ° C. for 1 minute. Thereafter, the heat-expandable microcapsule was heat-foamed under the conditions of 170 ° C. × 1 minute in a heat setter, and set processing was performed to obtain a moisture-permeable and waterproof fabric.

The following items were evaluated for the fabrics obtained in Examples 1 to 3 and Comparative Examples 1 to 5. The results are shown in Table 1.
(1) Water pressure resistance (kPa); JIS L-1092, high water pressure method (2) Water vapor transmission rate (g / m ² · 24 hrs); JIS L-1099, A-1 method
JIS L-1099, Method B-1 (3) Designability: Visually, three-dimensional appearance and appearance (visibility, clearness) were evaluated in five stages as follows.
Grade 5: Three-dimensional appearance and appearance are particularly good.
4th grade: Three-dimensional appearance and appearance are almost good.
3rd grade: Slightly inferior in volume and appearance.
2nd grade: Either three-dimensionality or appearance is inferior.
First grade: It is a normal film level that does not have design properties.
(5) Abrasion resistance: JIS L-1084, conforming to the A-1 method A cotton cloth (Kanakin No. 3 cloth) is attached to the friction element, and a sample is attached on the arc surface. The degree was evaluated in five stages as follows.
Level 5: No change Level 4: Slightly changed Level 3: Moisture-permeable waterproof layer is slightly damaged, and the three-dimensional effect and visibility are slightly reduced Level 2: Three-dimensional effect and visibility are evident along with damage to the moisture-permeable and waterproof layer Decreasing Grade 1… Due to the damage of the moisture-permeable waterproof layer, the stereoscopic effect and visibility are considerably reduced.

[Table 1]
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Example Comparison example
━━━━━━━━━━━ ━━━━━━━━━━━━━━━━━
1 2 3 1 2 3 4 5
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Water pressure resistance 231 252 263 230 250 250 227 246 258
A-1 moisture permeability 5802 4223 4113 6890 4290 5905 4287 4123
B-1 moisture permeability 6821 17920 16867 7021 18026 6905 18127 16976
Designability 4 5 5 1 1 1 1 2
Abrasion resistance 4 3 5 4 3 4 3 5
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  Since the moisture-permeable waterproof fabrics according to Comparative Examples 1 to 4 do not have a high foam layer, the design properties are higher than those of the moisture-permeable waterproof fabrics according to Examples 1 to 3 having a high foam layer. It is extremely low. Since the moisture permeable waterproof fabric according to Comparative Example 5 is laminated in the order of the fabric, the foam layer, the adhesive layer, and the moisture permeable waterproof layer, the expanded microcapsules in the high foam layer pass through the adhesive layer. Since it appears in the moisture waterproof layer, its design is reduced as compared with the moisture permeable waterproof fabrics according to Examples 1 to 3 in which the high foam layer is in direct contact with the moisture permeable waterproof layer.

Claims (6)

  A fabric, an adhesive layer, a highly foamed layer, and a moisture permeable waterproof layer are laminated and bonded in this order, and the highly foamed layer holds the microcapsules thermally expanded and the microcapsules on the inner surface of the moisture permeable waterproof layer. A moisture-permeable waterproof fabric provided with a highly foamed layer, characterized in that it is formed of the above-mentioned synthetic resin and a hydrophilic and microporous silica fine powder present on the surface of the microcapsule or in the synthetic resin.   The moisture-permeable waterproof fabric provided with the high foam layer according to claim 1, wherein the high foam layer is provided in a pattern.   The adhesive layer is bonded to the fabric and the highly foamed layer, and in a place where the highly foamed layer is not present, the fabric and the moisture permeable waterproof layer are bonded to each other. Moist waterproof fabric.   The moisture-permeable and waterproof fabric provided with the highly foamed layer according to any one of claims 1 to 3, wherein the moisture-permeable and waterproof layer is a nonporous film.   After forming a moisture-permeable waterproof layer on the surface of the release material, after applying a synthetic resin solution containing thermally expandable microcapsules and hydrophilic and microporous silica fine powder on the moisture-permeable waterproof layer And drying to form a synthetic resin layer, then laminating and laminating a fabric on the synthetic resin layer via an adhesive layer, and then expanding the thermally expandable microcapsule under heating. A method for producing a moisture-permeable and waterproof fabric having a highly foamed layer.   A synthetic resin solution is applied in a pattern to form a patterned synthetic resin layer, and the fabric and the synthetic resin layer are bonded via the adhesive layer, and the fabric and the moisture permeable waterproof layer are bonded. The method for producing a moisture-permeable and waterproof fabric according to claim 5, wherein the fabric is laminated and bonded onto the synthetic resin layer.