JP2015224404A - Moisture-permeable waterproof fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a moisture-permeable waterproof fabric excellent in folding and crumpling resistance and wear resistance.SOLUTION: A moisture-permeable waterproof fabric is provided with a polyurethane fine porous layer containing 3-30 mass% of polytetrafluoroethylene fine particles and 3-30 mass% of a planar powder consisting of a reaction product of L-lysine with an organic acid, on at least one side of fiber cloth. Preferably, 3-30 mass% of a silica fine particle is contained in the fine porous layer, and a polyurethane nonporous layer is laminated on the fine pore layer.

Description

  The present invention relates to a moisture-permeable and waterproof fabric.

  A moisture-permeable and waterproof fabric having both moisture permeability and waterproof properties has a function of releasing water vapor generated by perspiration from the body to the outside of clothes and a function of preventing rain from entering the clothes. It is suitably used for cold clothing and cold clothing.

  As such a moisture-permeable and waterproof fabric, a high-density fabric in which moisture-permeable and waterproof properties are realized by weaving fine yarns at high density, and a resin layer made of polyurethane, polyester, polyamide, polytetrafluoroethylene, or the like. A laminated fabric formed on one side of a fiber fabric is well known. Among these, a laminated fabric provided with a resin layer made of a polyurethane resin is particularly preferable in terms of versatility, cost, and performance.

  A laminated fabric provided with a resin layer is usually formed by a coating method in which a resin layer is directly formed on a fiber fabric as a microporous layer or a nonporous layer, or once a resin layer is formed on a release substrate such as a release paper. Therefore, it is manufactured by a laminating method or the like in which this is transferred to a fiber fabric.

  In recent years, from the viewpoint of cost reduction, there is an increasing number of cases that are used as so-called single sheets that use a moisture-permeable and waterproof fabric without a lining, and accordingly, wear resistance of the resin layer is emphasized. Tend to be.

  Thus, Patent Documents 1 to 3 disclose means for improving the wear resistance of the resin layer.

JP-A-2-281194 JP-A-3-213582 Japanese Patent Laid-Open No. 4-194082

  In the inventions described in Patent Documents 1 to 3, an effect of improving the wear resistance is recognized to some extent in the resin layer. However, in these inventions, since the wear resistance is improved by using a plate-like powder, it shows durability against unidirectional wear such as rubbing on the surface of the resin layer. At the same time, sufficient durability is not obtained with respect to wear that encases the entire resin layer.

  In addition, means for improving the wear resistance of the entire moisture-permeable and waterproof fabric by covering the resin layer with a lining has also been proposed. However, in order to increase the wear resistance of the entire fabric, it is necessary to completely cover the resin layer with a thick lining through a large amount of adhesive. If it does so, since the flexibility as a fabric will be lost, sufficient durability is still not acquired about the abrasion which stirs.

  The present invention has been made in view of such a current situation, and an object of the present invention is to provide a moisture-permeable and waterproof fabric excellent in weather resistance and wear resistance.

  As a result of diligent research to achieve the above object, the inventors of the present invention each contain a predetermined amount of polytetrafluoroethylene fine particles and a plate-like powder as a reaction product of L-lysine and an organic acid in the resin layer. As a result, it has been found that excellent weather resistance and wear resistance are expressed by the synergistic effect of the two, and the present invention has been made.

  That is, this invention consists of the following structures.

(1) A polyurethane microporous layer containing 3 to 30% by mass of polytetrafluoroethylene fine particles and 3 to 30% by mass of a plate-like powder which is a reaction product of L-lysine and an organic acid is formed on at least one side of the fiber fabric. A moisture permeable waterproof fabric characterized by comprising:
(2) The moisture-permeable and waterproof fabric according to (1), wherein the fine porous layer further contains 3 to 30% by mass of silica fine particles.
(3) The moisture-permeable and waterproof fabric according to (1) or (2), wherein a polyurethane non-porous layer is laminated on the microporous layer.
(4) The non-porous layer contains 3 to 30% by mass of polytetrafluoroethylene fine particles and 3 to 30% by mass of a plate-like powder which is a reaction product of L-lysine and an organic acid. (3) The moisture-permeable and waterproof fabric according to (3).
(5) The moisture-permeable and waterproof fabric according to any one of (1) to (4), wherein a lining is provided on a surface opposite to the fiber fabric.

  Of course, the moisture-permeable and waterproof fabric of the present invention is excellent in moisture-permeable and waterproof performance, and is also excellent in weather resistance and abrasion resistance. For this reason, it can be preferably used as a single sheet without a lining.

  In the present invention, excellent weather resistance and abrasion resistance are achieved by the synergistic effect of the polytetrafluoroethylene fine particles and the specific flat plate powder. Particularly, since the polytetrafluoroethylene fine particles are hydrophobic particles, As a result, the entire resin layer becomes strongly hydrophobic, and as a result, the waterproof performance (water pressure resistance) having washing durability is imparted to the fabric.

  Hereinafter, the present invention will be described in detail.

  The moisture-permeable and waterproof fabric of the present invention includes a polyurethane microporous layer on at least one surface of the fiber fabric.

  The fiber fabric in the present invention is used as a base fabric. Examples of fiber fabrics include polyamide synthetic fibers represented by nylon 6 and nylon 66, polyester synthetic fibers represented by polyethylene terephthalate, synthetic fibers such as polyacrylonitrile synthetic fibers, polyvinyl alcohol synthetic fibers, and triacetate. Examples thereof include woven fabrics, knitted fabrics and nonwoven fabrics made of semi-synthetic fibers or mixed yarns such as nylon 6 / cotton and polyethylene terephthalate / cotton.

  In order to obtain the moisture-permeable and waterproof fabric of the present invention, the fiber fabric may be water-repellent processed prior to the formation of the microporous layer. Thereby, when forming a microporous layer, the resin solution mentioned later becomes difficult to osmose | permeate the inside of a fiber fabric.

  The water-repellent treatment can be performed at any stage after weaving, but is usually performed after scouring and dyeing. The water repellent finish may be performed based on a padding method, a coating method, a gravure coating method, a spray method, or the like. Examples of the water repellent used in the processing include paraffinic water repellent, polysiloxane water repellent, and fluorine water repellent. Among these, a fluorine-based water repellent is preferable from the viewpoint of water repellency durability. Examples of the fluorine-based water repellent include "Asahi Guard AG-E081 (trade name)", "Asahi Guard AG-E082 (trade name)", "Asahi Guard AG-E500D (trade name)" manufactured by Asahi Glass Co., Ltd., “Unidyne TG-5521 (trade name)”, “Unidyne TG-5541 (trade name)”, Unidyne TG-5601 (trade name) manufactured by Daikin Industries, Ltd. “NUVAN2114 LIQ (trade name)” manufactured by Clariant Japan KK “NUVAN2116 LIQ (trade name)”.

  Furthermore, in the present invention, for the purpose of improving the water repellency durability, a triazine compound, an isocyanate compound or the like may be used in combination during the water repellency processing. In particular, an isocyanate compound is preferable from the viewpoint of environmental protection, and a blocked isocyanate compound is particularly preferable. Examples of the blocked isocyanate compound include a thermal dissociation type blocked isocyanate compound in which an isocyanate group is blocked with acetoxime, phenol, caprolactam or the like. By using this, the processing stability of the water repellent aqueous dispersion is improved. be able to.

  The amount of the water repellent applied to the fiber fabric is preferably 0.1 to 3% by mass, more preferably 0.3 to 2% by mass in terms of solid content. When the applied amount is less than 0.1% by mass, it is difficult to impart sufficient water repellency to the fiber fabric. On the other hand, when the applied amount exceeds 3% by mass, the texture of the fiber fabric tends to be hard, and further, the microporous layer. It is not preferable because it may adversely affect the adhesiveness or moisture permeability performance.

  Further, the fiber fabric may be crushed (calendered) for the purpose of further suppressing the penetration of the resin solution into the fiber fabric. The crushing process is not particularly limited, but generally, a woven or knitted fabric is run between a mirror roll having a temperature control function and a cotton roll or a plastic roll to crush the surface in contact with the mirror roll. . Usually, a microporous layer is formed on the crushed surface. The crushing process may be performed using a known calendar machine.

  In the present invention, a microporous layer is formed using a polyurethane resin. As a result, excellent moisture-permeable and waterproof performance is realized. As the polyurethane resin, those obtained by reacting a polyisocyanate component and a polyol component are suitable. As the polyisocyanate component, aromatic diisocyanate, aliphatic diisocyanate, alicyclic diisocyanate and the like are used alone or in combination. Specifically, tolylene-2,4-diisocyanate, 4,4′-diphenylmethane diisocyanate, 1,6-hexamethylene diisocyanate, 1,4-cyclohexane diisocyanate, or trifunctional or higher polyisocyanate is used alone or in combination. Used. On the other hand, as a polyol component, polyether polyol, polyester polyol, etc. are used, for example. As the polyether polyol, polyethylene glycol, polypropylene glycol, polytetraethylene glycol or the like is used. As the polyester polyol, a reaction product of a diol such as ethylene glycol or propylene glycol and a dibasic acid such as adipic acid or sebacic acid, or a ring-opening polymer such as caprolactone can be used. A polymer of the prepolymer can also be used.

  In the present invention, a polyurethane resin is used as the resin for forming the microporous layer as described above, but other resins may be used in combination as long as the effects of the present invention are not impaired. Examples of other resins include polyacrylic acid, polyvinyl chloride, polystyrene, polybutadiene, polyamino acid, polycarbonate, and the like, and copolymers thereof or those modified with fluorine or silicon can also be used. As content of other resin, it is preferable to set it as 15 mass% or less with respect to 100 mass% of microporous layers.

  Furthermore, you may contain a 3rd component in a microporous layer as needed. As the third component, a crosslinkable isocyanate compound is suitable. When the crosslinkable isocyanate compound is used, the polyurethane resin is crosslinked through the compound, the strength of the microporous layer is increased, and the adhesion between the microporous layer and the fiber fabric is improved. In general, the crosslinkable isocyanate compound is preferably contained in an amount of about 2 to 8% by mass (in terms of solid content) with respect to 100% by mass of the microporous layer. When the content of the crosslinkable isocyanate compound is less than 2% by mass, it is difficult to expect improvement in the strength and adhesiveness of the microporous layer. On the other hand, when the content exceeds 8% by mass, the crosslinking proceeds too much and the microporous layer is formed. As it becomes harder, the texture of the moisture-permeable and waterproof fabric tends to become harder.

  Examples of the crosslinkable isocyanate compound include tolylene 2,4-diisocyanate, diphenylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate and the like. Furthermore, triisocyanates obtained by addition reaction of 3 mol of these diisocyanates and 1 mol of a compound containing active hydrogen can also be used. Here, as the compound containing active hydrogen, for example, trimethylolpropane, glycerin and the like can be used.

  In addition, you may contain arbitrary additives, such as a pigment, a filler, an antibacterial agent, a deodorant, and a flame retardant, as a 3rd component.

  The microporous layer in the present invention is composed of a polyurethane resin as described above, but the microporous layer is specified as polytetrafluoroethylene fine particles for the purpose of further improving weather resistance and wear resistance. In the form of a flat powder.

  First, the polytetrafluoroethylene fine particles may be of any kind and manufacturing method as long as the result can reduce the friction coefficient of the microporous layer, and the shape may be either spherical, granular or fibrous. It may be. In the present invention, it is usually granular and obtained by an emulsion polymerization method, and the average primary particle diameter is preferably 0.05 to 10 μm, more preferably 0.1 to 5.0 μm, still more preferably. The thing of 0.1-1.0 micrometer is used. When the average particle size is smaller than 0.05 μm, the mechanical properties, that is, the weather resistance and abrasion resistance of the microporous layer tend not to be improved so much. On the other hand, when the average particle size exceeds 10 μm, the waterproof performance is deteriorated. This is not preferable because the fine particles tend to settle in the resin solution, and the fine particles tend to be unevenly distributed in the microporous layer.

  The average molecular weight of polytetrafluoroethylene is preferably about 500,000 to 30 million, more preferably about 3 to 25 million. If it is less than 500,000, the weather resistance and wear resistance tend not to be improved so much. On the other hand, those larger than 30 million tend to be difficult to manufacture, and even if manufactured, it is disadvantageous in terms of cost.

In addition, an average molecular weight is calculated | required from a following formula using a differential scanning calorimeter.
Mn = 2.1 × 10 ¹⁰ × DHc ^−5.16
Here, Mn is the number average molecular weight, DHc is the heat of crystallization (cal / g), and the sample used for the measurement is 5 mg.

  The content of the polytetrafluoroethylene fine particles needs to be 3 to 30% by mass with respect to 100% by mass of the microporous layer, and preferably 5 to 20% by mass. When the content of the polytetrafluoroethylene fine particles is less than 3% by mass, desired weather resistance and abrasion resistance are not expressed. When the content exceeds 30% by mass, the moisture permeability performance is likely to be reduced, and the resin solution The viscosity becomes unstable, leading to a decrease in the quality of the microporous layer and a decrease in the quality of the moisture-permeable and waterproof fabric.

  Furthermore, since the polytetrafluoroethylene fine particles are hydrophobic particles, the use of the fine particles imparts hydrophobicity to the entire microporous layer, and realizes waterproof performance with excellent washing durability.

  On the other hand, the plate-like powder, that is, a plate-like powder which is a reaction product of L-lysine and an organic acid, basically has any kind and manufacturing method as long as it can give lubricity to the microporous layer. It may be a thing. Here, as the organic acid, for example, propionic acid, butyric acid, isobutyric acid, pentanoic acid, hexanoic acid, heptanoic acid, octanoic acid, succinic acid, adipic acid, fumaric acid, maleic acid, phthalic acid, stearic acid, olein Examples include acids, linoleic acid, lauric acid, and linolenic acid. In particular, in the present invention, as the reaction product, a reaction product of L-lysine and an alkyl acid organic acid is preferable, and N-lauroyl-L-lysine is particularly preferable.

  The size and shape of the plate-like powder are not particularly limited, but in general, a white crystalline powder having a ratio of the length direction to the thickness direction of 3: 1 or less is preferable. In particular, from the viewpoint of waterproof performance, the length is preferably 50 μm or less, more preferably 5 to 20 μm, and the thickness direction is preferably 10 μm or less, more preferably 1 to 5 μm. Further, in the relationship between the particle diameter of the polytetrafluoroethylene fine particles and the thickness of the flat powder, the particle diameter of the fine particles is preferably smaller than the thickness of the powder. However, when the thickness of the powder is larger than the particle diameter of the fine particles by more than 5 μm, it is difficult to uniformly arrange the flat powder and the wear resistance tends to be lowered, which is not preferable.

  Moreover, as content of a flat powder, it is necessary to be 3-30 mass% with respect to 100 mass% of microporous layers, and it is preferable that it is 5-20 mass%. If it is less than 3% by mass, the effect of improving weather resistance and wear resistance is poor, while if it exceeds 30% by mass, the solution stability of the resin solution when forming the microporous layer is lowered, which is disadvantageous in terms of cost. It becomes.

  In relation to the polytetrafluoroethylene fine particles, the mass ratio of the two is preferably in the range of polytetrafluoroethylene fine particles: tabular powder = 1: 3 to 3: 1. When the mass ratio of both is out of this range, it is difficult to obtain a desired synergistic effect. Moreover, as total content of both, it is preferable that it is 40 mass% or less with respect to 100 mass% of microporous layers. When the total content exceeds 40% by mass, the texture of the moisture-permeable and waterproof fabric tends to be hard.

The polyurethane microporous layer in the present invention contains the polytetrafluoroethylene fine particles and the specific plate-like powder as described above. However, in the present invention, moisture permeability and waterproof performance as well as weather resistance and wear resistance are further improved. For the purpose of improvement, silica fine particles may be included in the microporous layer.
Conventionally known silica fine particles can be used. For example, fine particles made of silicon dioxide are suitable, and specifically, fine particles made of silicon dioxide having a primary particle diameter of about 7 to 40 nm are preferred. When the primary particle diameter exceeds 40 nm, the diameter of the pores formed in the microporous layer increases, and the water pressure resistance tends to decrease. On the other hand, when the thickness is less than 7 nm, it is not preferable because the production of the fine particles themselves becomes difficult and the handling becomes difficult.

  In the present invention, the silica fine particles are made of spherical primary particles having an amorphous glass shape and few pores, but fumed silica fine powder can be more preferably used. Specifically, hydrophilic fumed silica fine powder or hydrophobic fumed silica fine particles are used, among which hydrophobic fumed silica fine particles are preferable. As such silica fine particles, commercially available products can be used. For example, hydrophilic fumed silica such as “AEROSIL 90”, “AEROSIL 130”, “AEROSIL 150”, “AEROSIL 200”, “AEROSIL 300” manufactured by Nippon Aerosil Co., Ltd. Fine powder, hydrophobic fumed silica fine particles such as “AEROSIL RX200”, “AEROSIL RX300”, “AEROSIL R972”, “AEROSIL R974”, “AEROSIL R976”, “AEROSIL R7200”, “AEROSIL R8200”. Further, “AEROSIL COK84” which is a fine particle obtained by mixing fumed silica and fumed aluminum oxide can also be used.

  It is preferable that 3-30 mass% of silica fine particles are contained in the microporous layer, and 5-30 mass is more preferable. When the content of silica fine particles is less than 3% by mass, it is difficult to expect physical properties such as moisture permeation performance. When the content exceeds 30% by mass, the content increases excessively. On the contrary, the weather resistance and wear resistance of the microporous layer are increased. May decrease.

  In addition, the thickness of the microporous layer in the present invention is generally preferably about 10 to 70 μm. If the microporous layer becomes too thin, the water pressure resistance tends to decrease, and if it becomes too thick, the texture tends to decrease.

  In the present invention, a polyurethane nonporous layer may be further laminated on the microporous layer. Since the microporous layer is mainly composed of a polyurethane resin, the nonporous layer is also preferably composed of a polyurethane resin from the viewpoint of adhesiveness. By laminating the non-porous layer, the water pressure resistance (waterproof performance) can be improved. As the non-porous layer, a layer having moisture permeability may be adopted.

  As thickness of a non-porous layer, about 0.5-12 micrometers is preferable and 1-8 micrometers is more preferable. When the thickness is less than 0.5 μm, it is difficult to expect an improvement in water pressure resistance. When the thickness exceeds 12 μm, the moisture permeability performance generally tends to decrease as a whole resin layer depending on the moisture permeability performance of the nonporous layer itself. It is not preferable.

  When laminating the non-porous layer, the polytetrafluoroethylene fine particles and the specific flat plate shape are also applied to the non-porous layer as in the case of the microporous layer so that the entire resin layer can exhibit excellent weather resistance and abrasion resistance. It is preferable to contain a powder, and it is also preferable to contain silica fine particles as necessary. In this case, the content of the polytetrafluoroethylene fine particles is preferably 3 to 30% by mass with respect to 100% by mass of the nonporous layer, and the content of the plate-like powder which is a reaction product of L-lysine and an organic acid is 3 to 3% by mass. 30% by mass is preferred. Furthermore, the content of the silica fine particles is preferably 3 to 30% by mass.

  Since the moisture-permeable and waterproof fabric of the present invention is excellent in weather resistance and abrasion resistance, it can be used as a single sheet without a lining. However, this does not exclude the use of the lining, and the lining may be used as appropriate from the viewpoint of, for example, simplification of sewing and prevention of stickiness when sweating. The lining in this case is a lining when the above-described fiber fabric is viewed as a surface. That is, it is provided on the surface opposite to the fiber fabric.

  As the lining, in view of cost, texture, lightness and seam tape adhesion, in addition to polyamide-based synthetic fiber, polyester-based synthetic fiber, etc., from mixed yarn such as polyamide-based synthetic fiber / cotton, polyester-based synthetic fiber / cotton A woven or knitted fabric, a nonwoven fabric or the like can be used. You may use the thing similar to the said fiber fabric as a lining. The total fineness of the yarn constituting the lining is preferably 15 to 78 dtex, more preferably 15 to 44 dtex. By doing so, the seam tape can be easily adhered to the sewing portion, and both the waterproof performance and durability of the sealing portion are achieved. It can be improved. The seam tape is an adhesive tape that is bonded to the seam of a sewn product for the purpose of waterproofing.

  The lining may be laminated directly on the resin layer (microporous layer, non-porous layer), but in general, it is preferably laminated via an adhesive. A conventionally well-known thing can be used as an adhesive agent. For example, natural rubber, nitrile rubber, chloroprene rubber, vinyl acetate resin, acrylic resin, polyamide resin, polyester resin, ethylene-vinyl acetate copolymer resin, polyurethane resin, or the like may be used alone or in combination. As the type of the adhesive, a curable adhesive is preferable from the viewpoint of adhesion durability. Examples of the curable adhesive include a crosslinkable polyurethane resin having a reactive group such as a hydroxyl group, an isocyanate group, an amino group, or a carboxyl group, a polyester resin, a polyamide resin, and a polyethylene-vinyl acetate copolymer resin. These are self-crosslinked, or are cured by crosslinking with a crosslinking agent such as an isocyanate compound or an epoxy compound. Among these, a polyurethane-based resin which is rich in flexibility and excellent in practical use is preferable.

Next, the preferable method for obtaining the moisture-permeable waterproof fabric of this invention is demonstrated.
In the method of the present invention, a fiber fabric is first prepared. At this time, the fiber fabric may be dyed, water-repellent, or crushed as necessary.

  Thereafter, in addition to the polytetrafluoroethylene fine particles and the specific flat plate-like powder, those containing optional components such as silica fine particles and polyurethane resin for forming a microporous layer are dispersed uniformly to obtain a resin composition. . Specifically, after each component is roughly kneaded, it can be processed into a desired resin composition by simultaneously kneading using a three-roll mill, kneader, or sand mill.

  As described above, each component may have a different shape, particle size, etc. as described above, but it is used to form a microporous layer by processing it into a uniformly mixed and dispersed resin composition. The stability of the resin solution is increased, and each component is less likely to settle in the solution. As a result, since the components are arranged in a well-balanced manner in the microporous layer, improvement in weather resistance and wear resistance can be expected.

  After obtaining the resin composition, a resin solution for forming a microporous layer is prepared. The resin solution can be prepared by appropriately adding other resins, a third component and the like as necessary in addition to the polyurethane resin and the resin composition. As the solvent, N, N-dimethylformamide which is a parent solvent for the polyurethane resin is suitable. The content of the solvent is not limited, but is preferably about 60 to 85% by mass. In addition, the viscosity of the resin solution is preferably about 5000 to 30000 mPa · s (25 ° C.) in consideration of application workability.

  After preparing the resin solution, the resin solution is applied to the fiber fabric surface using a comma coater, a knife coater, or the like. After application, the microporous layer can be formed by dipping in a wet coagulation liquid. As the wet coagulation liquid, water or an aqueous N, N-dimethylformamide solution can be used. When using N, N-dimethylformamide aqueous solution, it is preferable that content of N, N-dimethylformamide shall be 30 mass or less. The temperature of the coagulation liquid is preferably about 10 to 40 ° C., and the coagulation time is preferably about 20 seconds to 3 minutes.

  After wet coagulation, in order to remove N, N-dimethylformamide remaining in the microporous layer, it is preferable to wash in hot water at a temperature of 40 to 80 ° C. for 1 to 10 minutes. And after hot water washing, it dries for 1 to 10 minutes at the temperature of 50-150 degreeC. Thereby, the moisture-permeable waterproof fabric provided with the microporous layer is obtained.

  In the present invention, as described above, a polyurethane nonporous layer may be further formed on the microporous layer. In order to form the nonporous layer, a resin solution for forming the nonporous layer may be applied to the surface of the microporous layer and dried. Alternatively, a resin solution may be applied to release paper and dried to form a nonporous layer once, and then transferred to the surface of the microporous layer.

  As the resin solution for forming the nonporous layer, a solution obtained by dissolving the polyurethane resin in an organic solvent can be used. Although it does not specifically limit as an organic solvent, Only when applying a resin solution directly to the microporous layer surface, it is preferable to use what has little content of N, N- dimethylformamide, or does not contain this at all. This is because N, N-dimethylformamide is a parent solvent of the polyurethane resin, and if the organic solvent is contained in a large amount, the surface layer of the microporous layer is easily eroded.

  The viscosity of the resin solution is preferably about 500 to 10,000 mPa · s (25 ° C.) in consideration of coating workability. The solid content concentration is preferably about 10 to 30% by mass.

  For the application of the resin solution, a knife coater, a comma coater, a reverse coater or a gravure roll having a high mesh and a low depth can be used. The drying temperature is preferably about 50 to 150 ° C., and the drying time is preferably about 30 seconds to 5 minutes.

  Furthermore, in the present invention, a lining may be provided as described above. As an adhesive used for laminating the backing, an adhesive corresponding to an emulsion type, a solvent type, a hot melt type, or the like can be used. When using an emulsion-type or solvent-type adhesive, adjust the viscosity to about 500 to 5000 mPa · s, and use a gravure roll or comma coater to completely or partially cover the resin layer surface or lining surface. Apply. After the application, the resin layer and the lining are pressure-bonded or thermo-compressed with a laminating machine. On the other hand, in the case of a hot melt type adhesive, first, heat is applied until the temperature of the adhesive reaches about 80 to 180 ° C. to melt it. And an adhesive agent is apply | coated to the resin layer surface or a lining surface completely or partially. Thereafter, the resin layer and the lining are pressure-bonded with a laminating machine while cooling if necessary.

  As described above, the adhesive is applied to the resin layer surface or the lining surface entirely or partially. However, in consideration of moisture permeability and texture, it is preferable to apply the adhesive partially. In this case, for example, it is preferably applied uniformly over the entire surface of the resin layer in the form of dots, lines, checkered patterns, turtle shell patterns, and the like. The occupied area of the adhesive is preferably about 10 to 60%. If the area occupied by the adhesive is less than 10%, the adhesive force becomes insufficient even if the thickness of the adhesive is increased, and the backing is easily peeled off. On the other hand, if it exceeds 60%, the adhesive force is sufficient, but the moisture permeability may be lowered depending on the type of adhesive. In other words, as long as a polyurethane adhesive having excellent moisture permeability is used as the adhesive, even if the area occupied by the adhesive exceeds 60%, there is no special step support. Furthermore, the thickness of the applied adhesive is usually preferably about 5 to 100 μm, although it depends on the area occupied by the adhesive, the unevenness of the backing, and the span feeling. If the thickness of the adhesive is less than 5 μm, the backing may not be sufficiently bonded, and if it exceeds 100 μm, the moisture permeability and texture of the moisture permeable and waterproof fabric tend to be reduced.

  The moisture permeable and waterproof fabric of the present invention is excellent in moisture permeable and waterproof performance, weather resistance, abrasion resistance, washing durability and the like. For this reason, it is suitable for sports clothing and cold clothing, and can also be applied to materials used in hard environments such as yachts and bicycle competitions. Of course, it can be used as a material for various products that require moisture permeability and waterproofness.

  EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated in detail, this invention is not limited to these. The measurement and evaluation of the performance of the fabric was performed by the following method.

(1) Water pressure resistance (waterproof performance)
It measured according to JIS L1092 (high water pressure method).

(2) Washing durability The water pressure resistance of the fabric after washing 100 times according to JIS L0217 (Method 103) was measured.

(3) Scratch resistance (water pressure resistance after stagnation)
The measurement was made with reference to the description of JIS K6722. In other words, after preparing a 15 cm square test piece, the test piece was folded in half in the warp direction so that the resin layers overlap and mounted on a Scott type weather resistance tester, and was subjected to stagnation treatment 200 times under a 9.8 N load. The water pressure resistance of was measured.

(4) Durability of weather resistance The water pressure resistance of the test piece after washing 100 times according to JIS L0217 (Method 103) was measured based on the above (3) description.

Example 1
A plain structure woven fabric having a warp density of 115 / 2.54 cm and a weft density of 95 / 2.54 cm was woven using nylon 6 multifilament 78 dtex / 68f for both the warp and the weft. The obtained fabric was scoured and then dyed with 1.0% omf of an acid dye (“Kayanol Blue N2G” manufactured by Nippon Kayaku Co., Ltd.). Thereafter, a 5% aqueous dispersion shown in Formula 1 below was prepared and applied to the fabric by a padding method (wet pickup rate 40%), then dried and heat-treated at 170 ° C. for 40 seconds. Subsequently, the fabric was crushed and processed using a calender machine having a mirror roll under the conditions of a temperature of 170 ° C., a pressure of 300 kPa, and a speed of 30 m / min.

<Prescription 1>
Asahi Guard AG-E082 50 parts by mass (manufactured by Asahi Glass Co., Ltd., fluorinated water repellent emulsion)
Meikanate WEB 10 parts by mass (manufactured by Meisei Chemical Industry Co., Ltd., crosslinking agent, block type isocyanate)
Isopropyl alcohol 10 parts by weight Water 930 parts by weight

  Next, Fluon L173JE (Asahi Glass Co., Ltd., polytetrafluoroethylene fine particles, average primary particle size 0.1 to 1.0 μm) 2.5 parts by mass, Amihope-LL (Ajinomoto Co., Ltd., thickness 1 2.5 parts by mass of N-lauroyl-L-lysine, which is a flat powder having a length of 3 to 7 μm and 3 μm, Rezamin CU4555 (manufactured by Dainichi Seika Kogyo Co., Ltd., solid content 27% by mass, microporous layer formation) Wet polyurethane resin) 50 parts by weight and N, N-dimethylformamide 15 parts by weight were roughly kneaded and then uniformly kneaded using a three-roll mill to obtain a resin composition A.

Subsequently, a polyurethane resin solution having the composition shown in the following prescription 2 (solid content concentration 22 mass%, polytetrafluoroethylene fine particle content 8 mass%, specific plate-shaped powder content 8 mass%, viscosity 10,000 mPa · s / 25 ° C.) Was prepared. After defoaming, 100 g / m ² of the resin solution was applied to the crushed surface using a comma coater and immediately immersed in a 20 ° C. water bath for 2 minutes to solidify the solid content. Next, after washing with hot water at 50 ° C. for 5 minutes, it was dried at 130 ° C. for 2 minutes to form a microporous layer. And it cured at 170 degreeC for 1 minute, and was set as the moisture-permeable waterproof fabric.

<Prescription 2>
Rezamin CU4555 50 parts by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., solid content 27% by mass, wet polyurethane resin for forming a microporous layer)
Rezamin X 1 part by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., crosslinking agent, isocyanate compound)
Resin composition A 70 parts by mass N, N-dimethylformamide 30 parts by mass

(Example 2)
Fluon L173JE (manufactured by Asahi Glass Co., Ltd., polytetrafluoroethylene fine particles, average primary particle size 0.1 to 1.0 μm) 2.5 parts by mass, Amihope-LL (Ajinomoto Co., Inc., thickness 1 to 3 μm, long 2.5 parts by mass of N-lauroyl-L-lysine, which is a flat powder having a thickness of 7 to 30 μm, and 2.5 parts by mass of AEROSIL R974 (Nippon Aerosil Kogyo Co., Ltd., silica fine particles having an average particle size of 12 nm) 50 parts by mass of Rezamin CU4555 (manufactured by Dainichi Seika Kogyo Co., Ltd., solid content 27% by mass, wet polyurethane resin for forming a microporous layer) and 17.5 parts by mass of N, N-dimethylformamide Then, it knead | mixed uniformly using the 3 roll mill machine, and the resin composition B was obtained.

  Subsequently, a polyurethane resin solution having the composition shown in the following prescription 3 (solid content concentration 24% by mass, polytetrafluoroethylene fine particles 7% by mass, specific plate-like powder 7% by mass, silica fine particles 7% by mass, viscosity 10500 mPa · s / 25 ° C.) and defoamed. Thereafter, a woven fabric with a crushing finish used in Example 1 was prepared. Thereafter, the resin solution was used in the same manner as in Example 1 to obtain a moisture-permeable waterproof fabric.

<Prescription 3>
Rezamin CU4555 50 parts by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., solid content 27% by mass, wet polyurethane resin for forming a microporous layer)
Rezamin X 1 part by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., crosslinking agent, isocyanate compound)
Resin Composition B 75 parts by mass N, N-dimethylformamide 25 parts by mass

(Example 3)
A polyurethane resin solution for forming a non-porous layer having a composition shown in the following formulation 4 (solid content concentration 19% by mass, viscosity 3500 mPa · s / 25 ° C.) was prepared and defoamed. Thereafter, the moisture-permeable and waterproof fabric obtained in Example 1 is prepared, and a resin solution is applied to the surface of the microporous layer using a knife coater at 20 g / m ^{2 and} dried at 100 ° C. for 2 minutes to form a nonporous layer. Thus, a moisture permeable waterproof fabric was obtained.

<Prescription 4>
Heimlen Y237NS 100 parts by mass (Daiichi Seika Kogyo Co., Ltd., solid content 25% by mass, dry polyurethane resin for nonporous layer formation)
30 parts by mass of methyl ethyl ketone

Example 4
1 part by mass of Fluon L173JE (Asahi Glass Co., Ltd., polytetrafluoroethylene fine particles, average primary particle size 0.1 to 1.0 μm), Amihope-LL (Ajinomoto Co., Inc., thickness 1 to 3 μm, length 7) 1 part by mass of N-lauroyl-L-lysine, which is a plate-shaped powder of ˜30 μm, and Hymurene Y237NS (manufactured by Dainichi Seika Kogyo Co., Ltd., solid content 25% by mass, dry polyurethane resin for nonporous layer formation) 50 parts by mass and 18 parts by mass of methyl ethyl ketone were roughly kneaded and then uniformly kneaded using a three-roll mill to obtain a resin composition C.

  Subsequently, a polyurethane resin solution having the composition shown in the following prescription 5 (solid content concentration 19% by mass, polytetrafluoroethylene fine particles 4% by mass, specific flat powder 4% by mass, viscosity 4000 mPa · s / 25 ° C.) Was prepared and degassed. Thereafter, the moisture-permeable and waterproof fabric obtained in Example 1 was prepared, and thereafter, the resin solution was used in the same manner as in Example 3 to obtain a moisture-permeable and waterproof fabric.

<Prescription 5>
Heimlen Y237NS 50 parts by mass (Daiichi Seika Kogyo Co., Ltd., solid content 25% by mass, dry polyurethane resin for nonporous layer formation)
Resin composition C 70 parts by mass Methyl ethyl ketone 20 parts by mass

(Example 5)
10 parts by mass of Fluon L173JE (Asahi Glass Co., Ltd., polytetrafluoroethylene fine particles, average primary particle size 0.1 to 1.0 μm), Amihope-LL (Ajinomoto Co., Inc., thickness 1 to 3 μm, length 7) Roughly kneading 4 parts by mass of N-lauroyl-L-lysine), which is a plate powder of ˜30 μm, and 16 parts by mass of N, N-dimethylformamide, and then kneading uniformly using a three roll mill machine, resin composition Product D was obtained.

  Subsequently, a polyurethane resin solution having the composition shown in the following prescription 6 (solid content concentration 26% by mass, polytetrafluoroethylene fine particles 24% by mass, specific plate-like powder 10% by mass, viscosity 10,000 mPa · s / 25 ° C.) Was prepared and degassed. Thereafter, a woven fabric with a crushing finish used in Example 1 was prepared. Thereafter, the resin solution was used in the same manner as in Example 1 to obtain a moisture-permeable waterproof fabric.

<Prescription 6>
Rezamin CU4555 50 parts by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., solid content 27% by mass, wet polyurethane resin for forming a microporous layer)
Rezamin X 1 part by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., crosslinking agent, isocyanate compound)
Resin composition D 80 parts by mass N, N-dimethylformamide 30 parts by mass

(Example 6)
4 parts by mass of Fluon L173JE (Asahi Glass Co., Ltd., polytetrafluoroethylene fine particles, average primary particle size 0.1 to 1.0 μm), Amihope-LL (Ajinomoto Co., Inc., thickness 1 to 3 μm, length 7) Roughly kneading 10 parts by mass of N-lauroyl-L-lysine), which is a plate powder of ˜30 μm, and 16 parts by mass of N, N-dimethylformamide, and then kneading uniformly using a three roll mill machine, resin composition Product E was obtained.

  Subsequently, a polyurethane resin solution having the composition shown in the following prescription 7 (solid content concentration 26% by mass, polytetrafluoroethylene fine particles 10% by mass, specific plate-like powder 24% by mass, viscosity 10000 mPa · s / 25 ° C.) Was prepared and degassed. Thereafter, a woven fabric with a crushing finish used in Example 1 was prepared. Thereafter, the resin solution was used in the same manner as in Example 1 to obtain a moisture-permeable waterproof fabric.

<Prescription 7>
Rezamin CU4555 50 parts by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., solid content 27% by mass, wet polyurethane resin for forming a microporous layer)
Rezamin X 1 part by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., crosslinking agent, isocyanate compound)
Resin composition E 80 parts by mass N, N-dimethylformamide 30 parts by mass

(Examples 7 to 12)
Using nylon 6 multifilament 22dtex / 7f, a 28G tricot knitted fabric was knitted and scoured and dyed by a usual method to prepare a lining.

Next, Tyforce WT-004 (manufactured by DIC Corporation, moisture-permeable polyurethane hot melt adhesive) was melted at 100 ° C. (melt viscosity 5000 mPa · s). And while maintaining the said temperature, using the dot-shaped gravure roll (dot diameter 0.75mm, 0.25mm between dots, depth 0.12mm, 25 mesh), the occupation area of an adhesive agent will be about 50% In addition, an adhesive was applied at 40 g / m ² from the resin layer (microporous layer or nonporous layer) of the fabric obtained in Examples 1 to 6. Then, the said lining was bonded and the moisture-permeable waterproof fabric (Examples 7-12) was obtained by ageing | curing | ripening at normal temperature for 4 days.

(Comparative Example 1)
While omitting the resin composition A from the formulation 2 to obtain a polyurethane resin solution having a composition shown in the following formulation 8 (solid content concentration 21% by mass, viscosity 10500 mPa · s / 25 ° C.), except that this resin solution is used, A comparative moisture-permeable waterproof fabric was obtained by the same method as in Example 1.

<Prescription 8>
Resamine CU4555 100 parts by mass
(Daiichi Seika Kogyo Co., Ltd., solid content 27% by mass, wet polyurethane resin for forming microporous layer)
Rezamin X 1 part by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., crosslinking agent, isocyanate compound)
N, N-dimethylformamide 35 parts by mass

(Comparative Example 2)
A comparative moisture-permeable waterproof fabric was obtained in the same manner as in Example 9 except that the resin solution shown in Formula 8 was used instead of the resin solution shown in Formula 2.

(Comparative Example 3)
A resin composition was prepared in the same manner as in Example 5 except that Amihope-LL was omitted. Then, a polyurethane resin solution (solid content concentration) was prepared in the same manner as in Example 5 using this resin composition. 26 mass%, 24 mass% of polytetrafluoroethylene fine particles, and a viscosity of 9500 mPa · s / 25 ° C.) were prepared. Thereafter, this resin solution was used in the same manner as in Example 11 to obtain a moisture-permeable waterproof fabric for comparison.

(Comparative Example 4)
A resin composition was prepared in the same manner as in Example 6 except that Fluon L173JE was omitted. Thereafter, a polyurethane resin solution (solid content concentration of 26) was prepared using this resin composition in the same manner as in Example 6. % By mass, 24% by mass of a specific flat powder, and a viscosity of 9500 mPa · s / 25 ° C.). Thereafter, this resin solution was used in the same manner as in Example 12 to obtain a moisture-permeable waterproof fabric for comparison.

  The performance of each fabric obtained in Examples 1-12 and Comparative Examples 1-4 is shown in Table 1 below.

As is apparent from Table 1, the moisture-permeable and waterproof fabric of the present invention is excellent in moisture-permeable and waterproof performance. Compared with the fabric obtained in the comparative example, not only weather resistance and abrasion resistance but also waterproof performance. Excellent washing durability.

Claims (5)

A polyurethane microporous layer containing 3 to 30% by mass of polytetrafluoroethylene fine particles and 3 to 30% by mass of a plate-like powder which is a reaction product of L-lysine and an organic acid is provided on at least one surface of the fiber fabric. A moisture-permeable and waterproof fabric characterized by comprising: The moisture-permeable and waterproof fabric according to claim 1, further comprising 3 to 30% by mass of silica fine particles in the microporous layer. The moisture-permeable and waterproof fabric according to claim 1 or 2, wherein a polyurethane non-porous layer is laminated on the microporous layer. The non-porous layer contains 3 to 30% by mass of polytetrafluoroethylene fine particles and 3 to 30% by mass of a plate-like powder that is a reaction product of L-lysine and an organic acid. The moisture-permeable waterproof fabric according to claim 3. The moisture-permeable and waterproof fabric according to any one of claims 1 to 4, further comprising a lining on a surface opposite to the fiber fabric.