Moisture permeable waterproof laminated fabric, manufacturing method of the same, and clothing using the same

Abstract

To provide a moisture permeable waterproof laminated fabric which can continue to exhibit air permeability and moisture permeability of a moisture permeable membrane even by rain and sweat during wearing, a manufacturing method of the same, and clothing of the same.SOLUTION: A moisture permeable waterproof laminated fabric 9 is formed by laminating a nanofiber nonwoven fabric layer 3 on one surface of a front fabric layer 2. At least one surface of the nanofiber nonwoven fabric layer 3 is a water repellent layer 5. The front fabric layer 2 and the nanofiber nonwoven fabric layer 3 are partially bonded by an adhesive 4. In a manufacturing method, a water repellent agent is applied and fixed to at least one surface of the nanofiber nonwoven fabric layer 3 to form the water repellent layer 5. The nanofiber nonwoven fabric layer 3 and the front fabric layer 2 are partially bonded by the adhesive 4.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a moisture-permeable, waterproof laminated fabric having high moisture permeability and waterproofness, a method for producing the same, and clothing using the same. [Background technology]

[0002] There have been many proposals for breathable waterproof materials, and the most commonly used materials are porous materials (polytetrafluoroethylene: PTFE) formed by extrusion stretching technology, porous materials (polyurethane: PU) formed by wet coagulation, and non-porous materials (PU) formed by dry coagulation. These materials have high values ​​for water pressure resistance and breathability, but they have not yet eliminated the stuffiness when worn. In addition, non-porous membranes formed by dry coagulation are hydrophilic, and when they become wet due to sweating or rain, not only does their performance decrease, but the membrane also swells, leading to a decrease in quality. In recent years, new moisture-permeable membranes formed by methods other than those mentioned above have been proposed. Specifically, there has been a proposal to laminate nanofibers spun by the electrospinning method (Patent Documents 1 and 2). In addition, for conventional moisture-permeable membranes, a material has been proposed in which a hydrophobic raw material is mixed into the polyurethane membrane from the viewpoint of preventing contamination with oily dirt and the purpose of preventing a decrease in water pressure resistance due to washing (Patent Document 3). From a similar viewpoint, a processing method has also been proposed for nanofiber moisture-permeable membranes in which a hydrophobic processing is applied to nanofibers (Patent Document 4). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2007-136970 A [Patent Document 2] JP 2008-213391 A [Patent Document 3] JP 2010-255132 A [Patent Document 4] JP 2010-030289 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, although the above-mentioned conventional technology has improved durability, there is a problem in that the moisture-permeable membrane itself becomes wet due to rain and sweat while the garment is being worn, and the breathability and moisture permeability of the moisture-permeable membrane are not exhibited.

[0005] In order to solve the above-mentioned conventional problems, the present invention provides a moisture-permeable, waterproof laminated fabric that can continue to exhibit the breathability and moisture permeability of its moisture-permeable membrane not only in dry conditions but also when exposed to rain and sweat while being worn, a manufacturing method thereof, and clothing. [Means for solving the problem]

[0006] The moisture-permeable waterproof laminated fabric of the present invention is a moisture-permeable waterproof laminated fabric in which a nanofiber nonwoven fabric layer is laminated on one surface of a surface fabric layer, at least one surface of the nanofiber nonwoven fabric layer being a water-repellent layer, and the surface fabric layer and the nanofiber nonwoven fabric layer being partially bonded together with an adhesive.

[0007] The method for producing a moisture-permeable waterproof laminated fabric of the present invention is a method for producing a moisture-permeable waterproof laminated fabric in which a nanofiber nonwoven fabric layer is laminated on one surface of a surface fabric layer, and is characterized in that a water repellent agent is applied to and fixed on at least one surface of the nanofiber nonwoven fabric layer to form a water-repellent layer, and the nanofiber nonwoven fabric layer and the surface fabric layer are partially bonded together with an adhesive.

[0008] The clothing of the present invention is characterized by using the moisture-permeable waterproof laminate fabric. Effect of the Invention

[0009] The moisture-permeable waterproof laminated fabric and garment of the present invention have a nanofiber nonwoven fabric layer laminated on one side of the surface fabric layer, at least one side of the nanofiber nonwoven fabric layer being a water-repellent layer, and the surface fabric layer and the nanofiber nonwoven fabric layer being partially bonded with an adhesive, so that the breathability and moisture permeability of the moisture-permeable membrane can be continuously exhibited not only in a dry state but also when rain or sweat is applied during wear. That is, rainwater from the outside air side of the moisture-permeable waterproof laminated fabric is prevented by the water-repellent layer on the surface of the nanofiber nonwoven fabric, and sweat (humid sweat: gas) from the body side is dissipated to the outside air side through gaps between the yarns of the surface fabric layer, gaps in the knitting and weaving structure, and voids in the nanofiber nonwoven fabric layer, so that the breathability and moisture permeability of the nanofiber nonwoven fabric (moisture-permeable membrane) can be continuously exhibited even when rain or sweat is applied during wear. As a result, a decrease in moisture permeability and water pressure resistance during wear is prevented, and a comfortable environment inside the garment can be maintained without a stuffy feeling. In addition, the manufacturing method of the moisture-permeable waterproof laminated fabric of the present invention can efficiently and rationally manufacture the moisture-permeable waterproof laminated fabric. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic cross-sectional view of a moisture-permeable, waterproof laminated fabric having a two-layer structure according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic cross-sectional view of a moisture-permeable, waterproof laminated fabric having a 2.5-layer structure according to one embodiment of the present invention. [Diagram 3] FIG. 3 is a schematic cross-sectional view of a moisture-permeable, waterproof laminated fabric having a three-layer structure according to one embodiment of the present invention. [Figure 4] 4A to 4E are schematic cross-sectional process diagrams showing a method for producing a moisture-permeable, waterproof laminated fabric having a three-layer structure according to one embodiment of the present invention. [Diagram 5] FIG. 5 is a schematic cross-sectional view showing the bonding state between a nanofiber nonwoven fabric layer and a surface fabric layer according to one embodiment of the present invention. [Figure 6] FIG. 6 is a plan view photograph (SEM, magnification 10,000 times) of a nanofiber nonwoven fabric according to one embodiment of the present invention. [Figure 7] FIG. 7 is a plan view photograph (SEM, magnification 2000x) of a nanofiber nonwoven fabric according to one embodiment of the present invention. [Figure 8]FIG. 8A is a schematic development view showing a moisture permeability measuring device (original method) used in an embodiment of the present invention, and FIG. 8B is an assembled perspective view of the same. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] In the present invention, a nanofiber nonwoven fabric layer is laminated on one side of a surface fabric layer, at least one side of the nanofiber nonwoven fabric layer is a water-repellent layer (water-repellent surface), and the surface fabric layer and the nanofiber nonwoven fabric layer are partially bonded with an adhesive. The surface fabric layer is the fabric layer that is on the outer side when the laminated fabric is made into a garment. In other words, it is the fabric layer that is directly exposed to rain when worn in rainy weather. The surface fabric layer may be water-repellent, but does not need to be water-resistant or waterproof. If the surface fabric layer is water-repellent, it will repel a small amount of rainwater, but if it is exposed to rain for a long time, the rainwater will penetrate into the fabric. By providing a moisture-permeable waterproof layer on the inside (skin side) of the surface fabric layer, it is possible to prevent rainwater that has penetrated through the surface fabric layer from entering the garment. However, if the moisture-permeable waterproof membrane is a nonporous membrane, the membrane has the property of absorbing water, so the moisture-permeable waterproof membrane absorbs rainwater that has penetrated through the surface fabric layer and enters the garment, wetting the garment and the skin, leading to a drop in body temperature. Therefore, by providing a water-repellent layer on at least one side of the moisture-permeable waterproof membrane, water can be prevented from entering the garment even if the outer fabric layer becomes wet. It is also preferable to provide a water-repellent layer on the outer fabric layer side of the nanofiber nonwoven fabric. This makes it possible to more effectively prevent rainwater that has permeated through the outer fabric layer from being absorbed into the moisture-permeable waterproof membrane. In this specification, "at least one side" refers to either the front side, the back side, or both sides.

[0012] The water-repellent layer applied to the nanofiber nonwoven fabric layer may be a water-repellent surface on the entire surface to be processed, or may be a water-repellent surface partially. The entire water-repellent surface refers to a state in which 100% of the surface area of ​​the nanofibers constituting the surface to be processed is water-repellent. The partial water-repellent surface refers to a state in which a part of the surface area of ​​the nanofibers constituting the surface to be processed is water-repellent. Even if the entire surface is water-repellent, there are gaps between the fibers in the thickness direction of the nanofiber nonwoven fabric layer, so the breathability is good, and sweat from the body side (humid sweat: gas) can be dissipated to the outside air through gaps between the threads of the surface fabric layer, gaps in the knitting structure, and voids in the nanofiber nonwoven fabric layer. In addition, since at least one side of the nanofiber nonwoven fabric is a water-repellent layer, rainwater from the outside air side is prevented by the water-repellent layer on the surface of the nanofiber nonwoven fabric, so there is no stuffy feeling when worn, and the breathability and moisture permeability of the moisture-permeable membrane can continue to be exhibited even when exposed to rain and sweat. In this specification, a nanofiber nonwoven fabric having a water-repellent layer is also referred to as a "moisture-permeable membrane" or "nanomembrane".

[0013] The thickness of the water-repellent layer is preferably 10 to 100% of the thickness of the nanofiber nonwoven fabric layer, more preferably 20 to 70%, and even more preferably 30 to 50%. This not only sufficiently prevents the nanofiber nonwoven fabric from losing its functionality when wet, but also enables the water retained therein to be expelled from the non-water-repellent surface to the outside of the nanofiber nonwoven fabric layer. The area ratio of the water-repellent layer (water-repellent surface) is preferably 10 to 100% in terms of area ratio, more preferably 20 to 95% in terms of area ratio, and even more preferably 30 to 90% in terms of area ratio, of the partial water-repellent surface, when the fiber surface area of ​​the nanofiber nonwoven fabric layer surface is taken as 100%. This allows the water repellent agent to prevent the pores of the nanofiber nonwoven fabric (moisture-permeable membrane) from being blocked and to prevent the intrusion of water. Here, the nanofiber nonwoven fabric layer surface refers to the surface of the nanofiber nonwoven fabric to be subjected to the water-repellent treatment.

[0014] When 100% water repellency is achieved by area ratio, the entire water repellent surface of the nanofiber nonwoven fabric layers that make up the nanofiber nonwoven fabric can be covered with the water repellent agent. Therefore, when the fabric is wet, the nanofibers do not absorb or retain water, preventing a decrease in functionality. In addition, detergent residue caused by washing can be reduced, which also prevents a decrease in water pressure resistance caused by washing.

[0015] When the water repellent treatment is performed at 30-90% area ratio, 30-90% of the surface area of ​​the water repellent treated surface of the nanofiber nonwoven fabric layer constituting the nanofiber nonwoven fabric can be covered with the water repellent agent. If the water repellent treatment is partial, the number of nanofibers that change the fiber diameter of the nanofiber nonwoven fabric due to the attachment of the water repellent agent is reduced, so the voids in the nanofiber nonwoven fabric are not blocked, and the breathability and moisture permeability when dry can be maintained at a high level. When the fabric is wet, the nanofibers are prevented from absorbing and retaining water, and the functional deterioration can be suppressed. Furthermore, the detergent residue due to washing can be suppressed, so the decrease in water pressure resistance due to washing can also be suppressed. The retained water can be discharged from the non-water repellent part to the outside of the nanofiber nonwoven fabric layer. Here, the area ratio is the ratio of the area of ​​the water repellent agent attached to the surface layer of the nanofiber nonwoven fabric when the total surface area of ​​the nanofiber fibers constituting the surface layer of the nanofiber nonwoven fabric is taken as 100. The surface layer of the nanofiber nonwoven fabric refers to the layer on the side where the water repellent treatment is applied.

[0016] The moisture-permeable waterproof laminated fabric of the present invention may have a two-layer structure in which a nanofiber nonwoven fabric is laminated on one side of a surface fabric, a 2.5-layer structure in which a resin layer is laminated on one side of the nanofiber nonwoven fabric, or a three-layer structure in which a backing fabric is further laminated on one side of the nanofiber nonwoven fabric and the nanofiber nonwoven fabric and the backing fabric are partially bonded together with an adhesive. A three-layer structure is preferable. This allows the nanofiber nonwoven fabric to be protected from both sides.

[0017] The nanofiber nonwoven fabric used in the present invention can be produced by electrospinning (electric field spinning), and the average diameter of the single fiber constituting the nonwoven fabric is preferably 1 to 1000 nm, more preferably 10 to 900 nm, and even more preferably 50 to 800 nm. The thickness of the nanofiber nonwoven fabric layer is preferably 0.1 to 100 μm, more preferably 1 to 90 μm, and even more preferably 5 to 80 μm. The mass per unit area is 1 to 50 g / m. 2 is preferable, and more preferably 2 to 40 g / m 2 and more preferably 3 to 30 g / m 2 It is. The front and / or back fabrics can be woven or knitted. Knitted fabrics include warp knitting, circular knitting, and weft knitting. Woven fabrics include plain weave, twill weave, satin weave, and other variegated weaves. Warp knitting or woven fabrics are preferred. These allow sweat (humid sweat: gas) from the body side to easily dissipate to the outside air through gaps in the knitted or woven structure. The preferred mass of the front fabric is 10 to 150 g / m 2 and more preferably 20 to 140 g / m 2 and more preferably 30 to 130 g / m 2 The preferred weight of the lining is 10 to 150 g / m 2 and more preferably 2 to 150 g / m 2 and more preferably 3 to 100 g / m 2 It is. The outer fabric is preferably subjected to a water-repellent treatment in advance. The thickness of the moisture-permeable waterproof laminated fabric of the present invention is preferably 0.15 to 1.0 mm. The mass of the moisture-permeable waterproof laminated fabric of the present invention is preferably 50 to 200 g / m 2 is preferable, and more preferably 70 to 160 g / m 2 and more preferably 80 to 140 g / m 2 This allows for weight reduction.

[0018] In the partial bonding of the surface fabric and the nanofiber nonwoven fabric with an adhesive, the ratio of the thickness of the adhesive layer to the thickness of the nanofiber nonwoven fabric layer (impregnation rate) is preferably 80% or less, more preferably 20 to 80%, and even more preferably 25 to 80%. This prevents the adhesive from seeping out to the back and front through the nanofiber nonwoven fabric or the surface fabric, ensuring good quality.

[0019] The partial bonding is preferably 10 to 80% by area ratio, more preferably 20 to 70%, and even more preferably 30 to 60%. This allows sweat (humid sweat: gas) from the body side to dissipate to the outside air through gaps in the yarns and knitted structure of the surface fabric layer and voids in the nanofiber nonwoven fabric layer, so that the breathability and moisture permeability of the moisture-permeable membrane can continue to be exhibited even when exposed to rain or sweat while wearing the garment. Here, the area ratio refers to the ratio of the projected area of ​​the adhesive onto the nanofiber nonwoven fabric layer to the sum of the apparent fiber surface area when the nanofiber nonwoven fabric is viewed from above and the area of ​​the voids present between the nanofibers.

[0020] The amount of adhesive applied is 2 to 20 g / m 2 is preferable, and more preferably 3 to 15 g / m 2 , and more preferably 4 to 12 g / m 2 This provides high adhesive strength between the nanofiber nonwoven fabric and the outer fabric, prevents peeling during actual use, and preserves the gaps between the fibers of the nanofiber nonwoven fabric, allowing the fabric to maintain high moisture permeability and air permeability, while retaining a good texture.

[0021] The adhesive is preferably impregnated and bonded so as to encompass the circumferential direction of the nanofiber fibers in contact with the adhesive surface between the nanofiber nonwoven fabric and the fabric layer. By attaching the adhesive so as to encompass the fibers of the nanofiber nonwoven fabric, the adhesive area between the nanofibers and the adhesive increases, and the adhesive strength increases. The same is true for adhesion to the water-repellent layer of the nanofiber nonwoven fabric, in which the adhesive also covers the water-repellent nanofibers, preventing the water repellent agent from falling off from the surface layer of the nanofiber nonwoven fabric and preventing a decrease in water pressure resistance due to washing.

[0022] The ratio of the thickness of the adhesive layer in the partial bonding of the backing fabric and the nanofiber nonwoven fabric with an adhesive is preferably 80% or less, more preferably 20 to 80%, and even more preferably 25 to 80%, as the ratio of the thickness of the adhesive layer to the thickness of the nanofiber nonwoven fabric layer (impregnation rate). This prevents the adhesive from seeping out to the back and front surfaces through the nanofiber nonwoven fabric or the backing fabric, resulting in good quality. The area ratio of the partial bonding is preferably 10 to 80%, more preferably 20 to 70%, and even more preferably 30 to 60%. This provides sufficient adhesive strength, prevents the adhesive from filling the voids in the nanofiber nonwoven fabric, and allows moisture permeability and air permeability to be maintained at a high level, thereby maintaining a good texture.

[0023] The adhesive is preferably impregnated in the nanofiber layer by 20 to 50% in the thickness direction in the partial adhesive bonding between the front fabric and the nanofiber nonwoven fabric, and the adhesive is preferably impregnated in the nanofiber layer by 20 to 50% in the thickness direction in the partial adhesive bonding between the back fabric and the nanofiber nonwoven fabric. This provides sufficient adhesive strength, maintains high moisture permeability and air permeability, and maintains a good texture. The adhesive is preferably impregnated and bonded so as to encompass the circumferential direction of the nanofiber fibers on the surface of the nanofiber nonwoven fabric opposite to the water repellent treatment. By attaching the adhesive so as to encompass the fibers of the nanofiber nonwoven fabric, the adhesive area between the nanofibers and the adhesive is increased, and therefore good adhesive strength can be obtained.

[0024] The adhesive may be polyurethane, polyester, polyamide, acrylic, silicone, inorganic, or the like, and is not particularly limited, but is preferably one that is highly compatible with the nanofiber nonwoven fabric. For example, when polyurethane is used as the nanofiber fiber, it is preferable to use a urethane adhesive. Furthermore, in the case of a moisture-curing urethane binder, it is more preferable because it can be used at low temperatures, so that adhesion can be achieved without damaging the structure of the nanofiber nonwoven fabric, and it also has a low environmental impact because it can be bonded without using a solvent. The amount of adhesive applied is 2 to 20 g / m 2 is preferable, and more preferably 3 to 15 g / m 2 , and more preferably 4 to 12 g / m 2 This allows the adhesive strength between the nanofiber nonwoven fabric and the outer fabric to be maintained at a high level, preventing peeling during actual use, while maintaining moisture permeability and breathability, and maintaining a good texture.

[0025] The airflow resistance of the moisture-permeable waterproof laminated fabric when it is wet with 30 to 80% liquid water is preferably 0 to 277.5 kPa·s / m, and more preferably 55 to 277.5 kPa·s / m. This allows the moisture-permeable waterproof laminated fabric to maintain a low airflow resistance when wet, prevents a decrease in moisture permeability and water pressure resistance while wearing the fabric, and maintains a comfortable environment inside the garment while wearing it. As a pre-test treatment, the moisture-permeable waterproof laminated fabric was immersed in water for 60 seconds and then hung to dry for 30 seconds. At the start of the measurement, it was confirmed that the moisture-permeable waterproof laminated fabric had 30 to 80% liquid water (wet) relative to its mass of 100%, before the measurement was performed. In addition, if the moisture-permeable waterproof laminated fabric has 30 to 80% liquid water (wet) relative to its mass of 100%, it will show a constant airflow resistance.

[0026] The moisture permeability of the breathable waterproof laminated fabric is 5000 to 20000 g / m2 according to the JIS L1099:2012 A-1 method in a dry state. 2 24h is preferable, and 7000 to 18000g / m 2 24h, and more preferably 9000 to 15000g / m 224h. Also, the moisture permeability according to JIS L1099: 2012 B-1 method is 10,000 to 100,000 g / m 2 24h is preferable, and 20,000 to 90,000 g / m 2 24h, and more preferably 30,000 to 80,000 g / m 2 24h. The water pressure resistance according to JIS L1092:2009 is preferably 7000mm to 30000mm, more preferably 8500mm to 30000mm, and even more preferably 10000mm to 30000mm. The water pressure resistance after 20 washings according to the JIS L 1930:2014 C4M method is preferably 5000 to 25000mm, more preferably 7000 to 25000mm, and even more preferably 8000 to 25000mm. The absolute humidity in the space according to the original method is 10 to 17g / m2 both in dry and wet conditions. 3 Furthermore, the air permeability according to the JIS L1096:2010 Frazier method is preferably 0.01 to 2 cc / m 2 ·sec is preferable, and 0.05 to 1.5cc / m is more preferable. 2 ·sec, and more preferably 0.1 to 1 cc / m 2 This allows the garment to maintain a comfortable environment inside when worn.

[0027] The method for producing a moisture-permeable waterproof laminated fabric of the present invention involves applying and fixing a water repellent agent to the surface fabric side of a nanofiber nonwoven fabric to form a water repellent layer, and partially bonding the water repellent layer side of the nanofiber nonwoven fabric to the surface fabric with an adhesive, or partially bonding the nanofiber nonwoven fabric to the surface fabric and then applying and fixing the water repellent agent to the non-adhesive surface of the nanofiber nonwoven fabric. Alternatively, the nanofiber nonwoven fabric is partially bonded to the surface fabric and the back fabric, and then applying and fixing the water repellent agent by a pad-and-dry method or the like. In this case, the water repellent agent is also applied to the surface of the nanofiber nonwoven fabric through the voids in the fibers and tissues of the surface fabric and the back fabric.

[0028] In the water-repellent layer, at least one side of the nanofiber nonwoven fabric layer is preferably treated with a non-fluorine-based water repellent. The non-fluorine-based water repellent may be a urethane-based, hydrocarbon-based, silicone-based, acrylic-based, or other type. Conventional fluorine-based water repellents are excellent in water repellency and durability, but they have a large environmental impact and are subject to use restrictions, so it is preferable to use a non-fluorine-based water repellent. Furthermore, it is more preferable to use a non-fluorine-based water repellent that has a high affinity with the nanofiber nonwoven fabric. For example, when polyurethane fibers are used in the nanofiber nonwoven fabric, a urethane-based non-fluorine-based water repellent may be used. More preferably, an alkyl urethane-based non-fluorine-based water repellent is used. A moisture-permeable waterproof fabric using a conventional fluorine-based water repellent or a moisture-permeable waterproof laminated fabric using a polytetrafluoroethylene (PTFE) membrane has an affinity for the hydrophobic group of detergent when washed, so that the breathability decreases. When an alkyl urethane-based non-fluorine-based water repellent is used, it has a high affinity with the polyurethane nanofiber nonwoven fabric, and the water repellent is easily fixed to the nanofiber fiber surface, effectively suppressing the decrease in water pressure resistance due to washing.

[0029] The amount of water repellent applied to the nanofiber nonwoven fabric is preferably 2 to 10% owf (short for weight of fiber). Within this range, the water repellent will not block the pores of the nanofiber nonwoven fabric and can prevent water from entering.

[0030] When the water-repellent layer side of the nanofiber nonwoven fabric is partially bonded to the front or back fabric, it is preferable to partially apply an adhesive to the front or back fabric and then bond it to the water-repellent layer side of the nanofiber nonwoven fabric. Similarly, when the non-water-repellent layer side of the nanofiber nonwoven fabric is bonded to the front or back fabric, it is preferable to partially apply a water repellent agent to the front or back fabric and then bond it to the non-water-repellent layer side of the nanofiber nonwoven fabric.

[0031] A preferred method for producing the present invention is as follows. Method A: Three-layer structure, with a water-repellent layer formed after bonding the backing fabric and nanofiber nonwoven fabric (1) Bonding the backing fabric and nanofiber nonwoven fabric An adhesive is applied partially to one surface of the backing fabric, and the backing fabric and the nanofiber nonwoven fabric are partially bonded together. (2) Formation of a water-repellent layer on nanofiber nonwoven fabric Next, a water repellent agent is applied to the nanofiber nonwoven fabric and then aged to fix the agent, thereby forming a water repellent layer. (3) Bonding the outer fabric and nanofiber nonwoven fabric Next, an adhesive is applied partially to one side of the outer fabric, and the outer fabric and the nanofiber nonwoven fabric are partially bonded together. The outer fabric is preferably treated to be water-repellent in advance, but may be treated to be water-repellent after bonding. This prevents the outer fabric from getting wet with rainwater. The fabric used for the outer fabric may be woven or knitted, and the fibers used may be synthetic fibers such as polyester, nylon, polypropylene, acrylic, and polyurethane, as well as natural fibers such as cotton, hemp, silk, and wool, and may be mixed fibers, mixed spinning, interwoven, or interknitted. Method B: 3-layer structure, padding water repellent after lamination of 3 layers (1) Bonding the backing fabric and nanofiber nonwoven fabric (2) Formation of a water-repellent layer on nanofiber nonwoven fabric: A water-repellent layer is formed on the front side of the nanofiber nonwoven fabric. (3) Bonding the outer fabric and nanofiber nonwoven fabric (4) Water-repellent treatment for laminated fabric C method: 3-layer structure, with the outer and base fabrics in a different water-repellent order from A method (1) Bonding the backing fabric and nanofiber nonwoven fabric (2) Formation of a water-repellent layer on nanofiber nonwoven fabric: A water-repellent layer is formed on the front side of the nanofiber nonwoven fabric. (3) Bonding of water-repellent outer fabric and nanofiber nonwoven fabric D method: 3-layer structure, laminated from the front side (1) Bonding the outer fabric and nanofiber nonwoven fabric (2) Formation of a water-repellent layer on nanofiber nonwoven fabric (3) Bonding the lining and nanofiber nonwoven fabric (4) Water-repellent finish on outer fabric Method E: 3-layer structure, laminated from the front side, padding water repellent after laminating the 3 layers (1) Bonding the outer fabric and nanofiber nonwoven fabric (2) Bonding the lining fabric and nanofiber nonwoven fabric (3) Water-repellent treatment for laminated fabric F method: 3-layer structure, laminated from the front side, the front fabric is water-repellent (1) Bonding of water-repellent outer fabric and nanofiber nonwoven fabric (2) Formation of a water-repellent layer on nanofiber nonwoven fabric: (3) Bonding the lining and nanofiber nonwoven fabric (4) Water-repellent finish on outer fabric G method: 2-layer structure, no lining (1) Formation of a water-repellent layer of nanofiber nonwoven fabric on release paper (2) Bonding the outer fabric and nanofiber nonwoven fabric (3) Water-repellent finish on outer fabric H method: 2-layer structure, outer fabric is water-repellent (1) Formation of a water-repellent layer of nanofiber nonwoven fabric on release paper (2) Bonding of water-repellent outer fabric and nanofiber nonwoven fabric I method: 2.5 layer structure (1) Formation of a water-repellent layer of nanofiber nonwoven fabric on release paper (2) Bonding the outer fabric and nanofiber nonwoven fabric (3) Water-repellent finish on outer fabric (4) Resin coating on the back of nanofiber nonwoven fabric J method: 2.5-layer structure, outer fabric is water-repellent (1) Formation of a water-repellent layer of nanofiber nonwoven fabric on release paper (2) Bonding of water-repellent outer fabric and nanofiber nonwoven fabric (3) Resin coating on the back of nanofiber nonwoven fabric

[0032] The nanofiber nonwoven fabric used in the present invention can be produced by a melt blowing method in which a molten polymer is blown with hot air to obtain nano-sized fibers, or a composite melt spinning method in which the sea component of a composite yarn with an island-in-sea structure is dissolved to obtain nanofibers. However, it is preferable to use an electrospinning method for spinning and laminating, since nanofibers can be easily controlled and produced stably. Materials used in the production of nanofiber nonwoven fabrics include polymeric materials such as polyurethane, polyester, nylon, polyethylene terephthalate, recycled polyester, polylactic acid, polyacrylonitrile, polyvinylidene fluoride, and crosslinked polyvinyl alcohol, but it is preferable to use thermoplastic polyurethane from the viewpoint of flexibility and stretchability. Examples of thermoplastic polyurethane include polyester-based polyurethane: for example, BASF's product name "Elastollan, ET680-15MS", polyether-based polyurethane: for example, BASF's product name "Elastollan, ET385", and the like. The solvent for dissolving the nanofiber raw material is not particularly limited, and a solvent suitable for dissolving the polymeric material of the nanofiber raw material can be selected and used. When producing nanofibers, additives such as heat storage agents, antibacterial agents, bacteriostatic agents, water repellents, and antistatic agents may be used together with the polymer material before spinning. The average fiber diameter of the nanofibers is 1 nm to 1,000 nm, more preferably 10 nm to 900 nm, and even more preferably 50 nm to 800 nm. The thickness of the nanofiber nonwoven fabric layer is 0.1 μm to 100 μm, more preferably 1 μm to 90 μm, and even more preferably 5 μm to 80 μm. The mass per unit area of ​​the nanofiber nonwoven fabric layer is 1 g / m 2 ~50g / m 2 , more preferably 2 g / m 2 ~40g / m 2 , more preferably 3 g / m 2 ~30g / m 2 The fibers constituting the nanofiber nonwoven fabric layer are preferably fibers obtained by electrospinning (electric field spinning).

[0033] The water repellent used for the water repellent treatment on at least one side of the nanofiber nonwoven fabric may be either a so-called C6 water repellent or a C0 water repellent. From the viewpoint of environmental consideration in recent years, it is preferable to use a C0 water repellent. The main component of the water repellent may be a silicone-based, urethane-based, acrylic-based, or hydrocarbon-based agent, and any of these may be used. Methods for directly treating at least one side of the nanofiber nonwoven fabric for water repellency include padding, application with a roll screen, a flat screen, or a spray, and any of these may be used. Padding is preferred to cover the surface of the nanofiber nonwoven fabric 100% with the water repellent, and treatment with a roll screen, flat screen, or spray is preferred to make it partially water repellent. The nanofiber nonwoven fabric surface can also be treated for water repellency by bonding it to the front fabric or the back fabric and then performing the water repellent treatment. For example, when the water-repellent treatment is performed after the front fabric and the nanofiber nonwoven fabric are bonded together, the water-repellent agent reaches the front fabric layer side of the nanofiber nonwoven fabric through the gaps between the fibers of the front fabric and the gaps in the structure. When the water-repellent treatment is performed from the back fabric side after the back fabric and the nanofiber nonwoven fabric are bonded together, the water-repellent agent also reaches the back fabric layer side of the nanofiber nonwoven fabric through the gaps between the fibers of the back fabric and the gaps in the structure. When a mesh material is used as the back fabric, the amount of water-repellent agent that passes through the back fabric and reaches the back fabric layer of the nanofiber nonwoven fabric increases, and the water-repellent agent can reach the front fabric layer side of the nanofiber nonwoven fabric. The same is true for the water-repellent treatment after both the front fabric and the back fabric are bonded together with the nanofiber nonwoven fabric. Methods for water-repellent treatment after bonding the front fabric, the back fabric, or both to the nanofiber nonwoven fabric include pad treatment, roll screen, flat screen, spray application, and the like, and any of these may be used. The outer fabric has a breathability rating of 5 (JIS L 1096). cc / cm 2 / sec or more, which allows the water repellent to efficiently permeate through gaps between the fibers of the outer fabric and gaps in the structure, reach the surface of the nanofiber nonwoven fabric layer, and be applied to the surface of the nanofiber nonwoven fabric layer. When a backing fabric and a nanofiber nonwoven fabric are bonded together and then a water-repellent treatment is performed from the backing fabric side, if the nanofiber nonwoven fabric is made of thermoplastic polyurethane and the main component of the water repellent is silicone-based or urethane-based, the water repellent has a high affinity with the nanofiber nonwoven fabric and reaches the front fabric layer side of the nanofiber nonwoven fabric more efficiently.

[0034] When bonding the nanofiber nonwoven fabric and the outer fabric, the nanofibers may be directly laminated on the fabric, or the nanofibers spun and laminated on the release paper may be bonded to the fabric with an adhesive. From the viewpoint of performance stability, it is preferable to spun and laminate on the release paper and bond with an adhesive. The adhesive used to bond the nanofiber nonwoven fabric and the outer fabric may be a urethane-based, epoxy-based, melamine-based, nylon-based, one-liquid type, two-liquid type, or other adhesive. The adhesive can be applied to the outer fabric by a processing method such as a knife coater, roll coater, bar coater, or spray. If the adhesive is applied so as to completely cover the surface of the nanofiber nonwoven fabric, the texture will harden and the moisture permeability and breathability will be hindered, so it is preferable to bond partially. If the adhesive can be applied partially and the nanofiber nonwoven fabric and the outer fabric can be bonded, any adhesion method such as a knife coater, roll coater, bar coater, or spray can be used.

[0035] The back side of the moisture-permeable waterproof laminated fabric may be used without processing, may be resin-treated, or another layer of fabric may be bonded to it. When using without processing, there is a concern that the nanofiber fibers may be destroyed, so it is preferable to use it in such a way that the back side of the laminated fabric is not visible, such as using it as the outer fabric of down wear or padded jackets. When resin processing is applied, resins such as urethane resin, acrylic resin, and nylon resin can be used. As a method of applying resin processing, it is possible to apply the resin in a partial pattern using a gravure roll, or to apply the resin to the entire surface using a knife coater.

[0036] When a single-layer fabric is bonded to the back side of the moisture-permeable waterproof laminated fabric, the back fabric may be a tricot fabric, a circular knit fabric, or a woven fabric. The fibers used may be synthetic fibers such as polyester, nylon, polypropylene, acrylic, and polyurethane, as well as natural fibers such as cotton, linen, silk, and wool, and may be blends, interwoven, interknitted, or interwoven. Of these, half-tricot warp knit using nylon multifilament yarn is preferred for the back fabric. The fabric used for the outer fabric may be woven or knitted, and the fibers used may be synthetic fibers such as polyester, nylon, polypropylene, acrylic, polyurethane, etc., as well as natural fibers such as cotton, linen, silk, wool, etc., and may be blends, mixed spinning, interwoven, or interknitted of these. Among these, the outer fabric is preferably a warp knit tricot fabric using polyester (PET) multifilament yarn.

[0037] In the following drawings, which will be described with reference to the drawings below, the same reference numerals indicate the same objects. Fig. 1 is a schematic cross-sectional view of a two-layer moisture-permeable waterproof laminated fabric according to one embodiment of the present invention. In this moisture-permeable waterproof laminated fabric 1, a nanofiber nonwoven fabric layer 3 is laminated on one surface of a surface fabric layer 2, and the surface fabric layer 2 and the nanofiber nonwoven fabric layer 3 are bonded together at a partial adhesive portion 4. In addition, the surface of the nanofiber nonwoven fabric layer 3 facing the surface fabric layer 2 is a water-repellent layer 5. 2 is a schematic cross-sectional view of a moisture-permeable, waterproof laminated fabric 6 having a 2.5-layer structure according to one embodiment of the present invention. The difference from FIG. 1 is that a print layer 7 is formed on the back surface of the nanofiber nonwoven fabric layer 3. Fig. 3 is a schematic cross-sectional view of a three-layer moisture-permeable waterproof laminated fabric 9 according to one embodiment of the present invention. The difference from Fig. 1 is that a backing fabric layer 10 is formed on the back surface of the nanofiber nonwoven fabric layer 3, and the nanofiber nonwoven fabric layer 3 and the backing fabric layer 10 are bonded together at a partial adhesive portion 8.

[0038] 4A-E are schematic cross-sectional process diagrams showing a method for manufacturing a three-layer moisture-permeable waterproof laminated fabric according to one embodiment of the present invention. First, as shown in FIG. 4A, an adhesive is applied partially to one surface of the backing fabric layer 10, and the backing fabric 10 and the nanofiber nonwoven fabric 3 are bonded together at the partially bonded portion 8. This results in the state shown in FIG. 4B. Next, as shown in FIG. 4C, a water repellent is applied partially to the nanofiber nonwoven fabric layer 3, and the water repellent layer 5 is formed by aging and fixing. Next, as shown in FIG. 4D, an adhesive is applied partially to one surface of the front fabric layer 2, and the front fabric layer 2 and the nanofiber nonwoven fabric layer 3 are bonded together at the partially bonded portion 4. This results in the state shown in FIG. 4E, and a moisture-permeable waterproof laminated fabric 9 is obtained.

[0039] 5 is a schematic cross-sectional view showing the adhesion state between a nanofiber nonwoven fabric layer and a surface fabric layer according to one embodiment of the present invention. In this partially bonded portion 11, an adhesive 13 is present between fibers 12 of the surface fabric layer and fibers 14 of the nanofiber nonwoven fabric layer, and the adhesive 13 is impregnated so as to encompass the fibers 12 of the surface fabric layer and the fibers 14 of the nanofiber nonwoven fabric layer. This can increase the adhesive strength. It is preferable that the adhesive is impregnated and bonded so as to encompass the circumferential direction of the nanofiber fibers on the water-repellent layer side of the nanofiber nonwoven fabric. By attaching the adhesive so as to encompass the fibers of the nanofiber nonwoven fabric, the adhesive area between the nanofibers and the adhesive is increased, and good adhesive strength can be obtained.

[0040] Fig. 6 is a planar photograph (scanning electron microscope: SEM, magnification 10,000 times) of a nanofiber nonwoven fabric according to one embodiment of the present invention. Fig. 7 is a planar photograph (SEM, magnification 2,000 times) of a nanofiber nonwoven fabric according to one embodiment of the present invention. EXAMPLES

[0041] The present invention will be described in more detail below with reference to examples, but it should be understood that the present invention is not limited to the following examples. The evaluation method is as follows. <Mass per unit area> Measurements were performed in accordance with JIS L1096:2010 Method A. <Water pressure resistance> Measurements were performed in accordance with JIS L1092:2009 Method B. <Moisture permeability> The measurements were carried out in the following three ways. ·JIS L1099:2012 A-1 method ·JIS L1099:2012 B-1 method Original method As shown in the moisture permeability measuring device 15 of FIG. 8A-B, a glass petri dish 17 with a diameter of 6.4 cm is placed on a hot plate 16 controlled at 35°C. Approximately 15 g of water is placed in the petri dish 17. A polypropylene box 18 (15 cm long, 15 cm wide, 3.5 cm high) is placed to cover the petri dish 17 and the hot plate 16. The top of the box 18 has an opening of 10 cm x 10 cm, and a fabric 20 (cut to a size of 15 cm x 15 cm) is attached to cover this opening. A wind 21 of 0.3 m / sec is blown from above the fabric 20 as shown by the arrow. A temperature and humidity sensor 19 (Hygroclone, KN Laboratories, Inc.) is attached to the inner wall of the box 18, and the temperature and relative humidity in the space formed by the hot plate 16, the box 18, and the fabric 20 are measured. From the measured temperature and relative humidity, the absolute humidity was calculated using the following formula. The measurements were carried out in a room whose temperature and humidity were controlled to 20°C and 65% RH. Absolute humidity (g / m 3 )=217×6.1078×10 (7.5 × T / (T+237.3)) / (T+273.15) ×RH / 100 Where T: temperature (℃), RH: relative humidity (%) This test method was performed under two conditions: dry and wet. In the dry condition, the test sample was placed in a room with a temperature of 20°C and a relative humidity of 65%RH for more than 24 hours, and the above test was performed under temperature and humidity control. In the wet condition, the fabric was immersed in ion-exchanged water for one hour, then hung to dry for one minute to remove water droplets from the fabric, and then the test was performed. <Air flow resistance> The measurement was performed using an airflow resistance tester KS-F8 (manufactured by Kato Tech Co., Ltd.) by discharging and sucking air into the atmosphere, detecting the pressure at the time of discharging and sucking, and calculating the airflow resistance R. Airflow: 0.4cc / cm 2 / sec (constant airflow rate method) Ventilation hole area: 2πcm 2 The airflow resistance in the dry state was measured under the conditions of a temperature of 20°C and a relative humidity of 65%RH with the fabric in a dry state. The airflow resistance in the wet state was measured with the air discharge / intake direction parallel to the ground when the fabric was moistened with 30-80% moisture relative to 100% mass. The temperature and humidity were the same as above. As a pretreatment for the wet test, the moisture-permeable waterproof laminated fabric was immersed in ion-exchanged water for 60 seconds and then hung to dry for 30 seconds. At the start of the measurement, it was confirmed that the moisture-permeable waterproof laminated fabric had 30-80% liquid water relative to 100% mass, before the measurement was started. It was also confirmed that the moisture-permeable waterproof laminated fabric showed a constant airflow resistance value if it had 30-80% liquid water (wet) relative to 100% mass. The measurement method is as follows. (1) The fabric was immersed in a water tank so that it was perpendicular to the ground, and then the sample was removed and placed in the testing machine. (2) Measurements were performed in accordance with the KES test manual. <Breathability> The breathability of the fabric was measured using JIS L1096:2010 (Fragile method).

[0042] Example 1 (1) Outer fabric A 22 decitex, 24 filament polyester multifilament yarn was used and knitted on a 40 gauge warp knitting machine (tricot knitting machine). After that, it was refined, pre-set, dyed, water-repellent treated and heat-set, and used as the outer fabric. The weight of the outer fabric is 73 g / m 2 It was. (2) Lining A 22 decitex, 12 filament nylon yarn was used to knit a half tricot structure using a tricot knitting machine. The fabric was then dyed and finished to obtain a lining. The weight of the lining was 22 g / m 2 It was. (3) Nanofiber nonwoven fabric The nanofiber nonwoven fabric was produced by electrospinning. Thermoplastic polyurethane (polyester polyurethane) was used as the nanofiber material, and an organic solvent capable of dissolving polyurethane and a polar solvent suitable for electrospinning (a mixed solvent of dimethylformamide and methyl ethyl ketone) were used as the solvent. The average fiber diameter of the single fibers constituting the polyurethane nanofiber nonwoven fabric was 250 nm. The thickness of this nonwoven fabric was 19 μm, and the mass per unit area was 7.5 g / m 2 It was. (4) Adhesion of the lining and nanofiber nonwoven fabric A polyamide-based hot melt adhesive was applied in dots to the backing fabric, and the nanofiber nonwoven fabric was placed over the adhesive-coated surface, which was then pressed and bonded through a heated roll at 110°C and rolled up. The adhesive area between the backing fabric and the nanofiber nonwoven fabric was 40% of the total area, and the adhesive impregnation rate in the thickness direction was 30%. (5) Water-repellent treatment to the surface of nanofiber nonwoven fabric After bonding the backing fabric and the nanofiber nonwoven fabric, the surface of the nanofiber nonwoven fabric was treated to be water repellent. A 100-fold diluted solution of a non-fluorinated water repellent (ON Water Repellent NF, manufactured by OG Nagase Color Chemicals Co., Ltd.) whose main component is alkyl urethane was prepared as the water repellent, and the water repellent was applied to the surface of the nanofiber nonwoven fabric surface layer using a spray to a concentration of 4% owf (on the weight of fiber). After applying the water repellent, the fabric was dried at 110°C for 1 minute. The thickness of the water repellent layer formed on the surface of the nanofiber nonwoven fabric was 30% from the surface of the nanofiber nonwoven fabric. The application area ratio of the water repellent was 80% when the whole was taken as 100%. (6) Gluing the outer fabric The nanofiber nonwoven fabric with a water-repellent surface was attached to the outer fabric. A moisture-curing urethane binder was used as the adhesive, with a density of 10 g / m 2The adhesive was applied by spray so that the adhesive was applied to the laminated fabric. After application, the fabric was passed through a heat roll at 110°C and a speed of 20 m / min to fix the adhesive and obtain a laminated fabric. The adhesive area between the outer fabric and the nanofiber nonwoven fabric was 40% of the total area taken as 100%. The adhesive impregnation rate in the thickness direction was 30%. The moisture-permeable, waterproof laminated fabric thus obtained had a thickness of 0.44 mm when left at rest.

[0043] Example 2 For the outer fabric, 22 decitex, 24 filament polyester yarn was used, and a gauge warp knitting machine was used to knit a tricot mesh fabric. After that, the fabric was refined, pre-set, dyed, water-repellent, and heat-set, and this was the outer fabric. The mass of the outer fabric was 53 g / m 2 The rest of the experiment was carried out in the same manner as in Example 1. The moisture-permeable, waterproof laminated fabric thus obtained had a thickness of 0.50 mm when left at rest.

[0044] Example 3 Average fiber diameter of polyurethane nanofiber: 250 nm, thickness of nanofiber nonwoven fabric layer: 12 μm, mass of nanofiber nonwoven fabric layer: 6 g / m 2 A moisture-curing polyurethane hot melt adhesive was applied to the backing fabric at a rate of 10 g / m 2 The adhesive was sprayed onto the surface of the nanofiber nonwoven fabric, which was then pressed through a heated roll to bond the fabric and take up. The temperature of the heat press was 110°C, and the take-up speed was 20 m / min. The rest of the process was the same as in Example 1. The adhesion area between the backing fabric and the nanofiber nonwoven fabric was 45% of the total adhesion area, and the adhesive impregnation rate in the thickness direction was 40%. The thickness of the water-repellent layer of the water-repellent treatment on the surface of the nanofiber nonwoven fabric was 40% from the surface of the nanofiber nonwoven fabric, and the coating area ratio of the water-repellent agent was 85% when the whole was taken as 100%. The adhesive area between the outer fabric and the water-repellent nanofiber nonwoven fabric was 45% of the total area taken as 100%, and the adhesive impregnation rate in the thickness direction was 40%. The moisture-permeable, waterproof laminated fabric thus obtained had a thickness of 0.52 mm when left at rest.

[0045] Example 4 In the bonding process between the backing fabric and the nanofiber nonwoven fabric, 7g / m of moisture-curing polyurethane hot melt adhesive is applied to the backing fabric. 2 The adhesive was sprayed onto the surface of the nanofiber nonwoven fabric, which was then pressed through a hot roll to bond the fabric and take up the fabric. The hot press temperature was 110°C and the take-up speed was 20 m / min. The rest of the procedure was the same as in Example 3. The moisture-permeable, waterproof laminated fabric thus obtained had a thickness of 0.52 mm when left at rest.

[0046] Example 5 (1) Outer fabric Nylon multifilament yarn with 44 decitex and 36 filaments was used, and it was woven, refined, preset, dyed, water-repellent treated and heat-set to a density of 150 threads / inch vertically and 100 threads / inch horizontally, and used as the outer fabric. The weight of the outer fabric was 43 g / m 2 It was. (2) Lining The lining fabric described in Example 1 was used. (3) Nanofiber nonwoven fabric The nanofiber nonwoven fabric described in Example 3 was used. (4) Adhesion of the lining and nanofiber nonwoven fabric A moisture-curing polyurethane hot melt adhesive was applied in dots to the backing fabric at 6g / m2, and a nanofiber nonwoven fabric was placed on the adhesive-coated surface, which was then passed through a heated roll to press-bond the fabric and then rolled up. The adhesion area between the backing fabric and the nanofiber nonwoven fabric was 55% of the total adhesion area, and the adhesive impregnation rate in the thickness direction was 28%. (5) Water-repellent treatment to the surface of nanofiber nonwoven fabric After bonding the backing fabric and the nanofiber nonwoven fabric, the surface of the nanofiber nonwoven fabric was treated to make it water-repellent. A 100-fold diluted solution of a non-fluorinated water repellent (ON Water Repellent NF, manufactured by OG Nagase Color Chemicals Co., Ltd.) whose main component is alkyl urethane was prepared as the water repellent, and the water repellent was applied to the surface of the nanofiber nonwoven fabric by spraying at 4% owf (on the weight of fiber). After applying the water repellent, the fabric was dried at 110°C for 1 minute. The thickness of the water repellent layer formed on the surface of the nanofiber nonwoven fabric was 30% from the surface layer of the nanofiber nonwoven fabric. The application area ratio of the water repellent was 80% when the whole was taken as 100%. (6) Gluing the outer fabric The nanofiber nonwoven fabric, the surface of which had been treated to be water repellent, was bonded to the outer fabric. A moisture-curing polyurethane hot melt adhesive was applied to the outer fabric in dots at 9g / m2, and the nanofiber nonwoven fabric was placed on top of the adhesive-coated surface, which was then pressed through a heated roll and rolled up to bond the adhesive and obtain a laminated fabric. The adhesive area between the outer fabric and the nanofiber nonwoven fabric was 60% of the total area, assuming the entire area to be 100%. The adhesive impregnation rate in the thickness direction was 35%. The moisture-permeable, waterproof laminated fabric thus obtained had a thickness of 0.37 mm when left at rest.

[0047] Example 6 (1) Outer fabric The outer fabric described in Example 2 was used. (2) Lining The lining fabric described in Example 1 was used. (3) Nanofiber nonwoven fabric The nanofiber nonwoven fabric described in Example 3 was used. (4) Adhesion of outer fabric and nanofiber nonwoven fabric A moisture-curing polyurethane hot melt adhesive was applied in dots to the outer fabric at 12 g / m2, and a nanofiber nonwoven fabric was placed on top of the adhesive-coated surface, which was then passed through a heated roll to press and bond the fabric together, and then rolled up. In the bonding between the outer fabric and the nanofiber nonwoven fabric, the bonding area was 60% of the total area, and the adhesive impregnation rate in the thickness direction was 40%. (5) Attaching the lining The backing fabric was attached to the opposite side of the nanofiber nonwoven fabric to the side attached to the front fabric. A moisture-curing urethane binder was used as the adhesive, with a thickness of 10 g / m 2 The adhesive was applied in dots with a gravure roll so that the adhesive was fixed to obtain a laminated fabric. The adhesive area between the backing fabric and the nanofiber nonwoven fabric was 35% of the total area taken as 100%. The adhesive impregnation rate in the thickness direction was 40%. (6) Water-repellent treatment of laminated fabric A non-fluorine-based water repellent mainly composed of alkyl urethane was applied to the laminated fabric produced above by the pad-and-dry method so that the water repellent was 5% owf. After the water repellent was applied, the fabric was dried at 150°C for 90 seconds. The thickness of the water repellent layer formed on the nanofiber nonwoven fabric was 20% on the front fabric layer side and 30% on the back fabric layer side. The coating area ratio of the water repellent was 60% on the front fabric layer side and 80% on the back fabric layer side. The moisture-permeable, waterproof laminated fabric thus obtained had a thickness of 0.60 mm when left at rest.

[0048] Example 7 (1) Outer fabric The outer fabric described in Example 2 was used. (2) Lining The lining fabric described in Example 1 was used. (3) Nanofiber nonwoven fabric The nanofiber nonwoven fabric described in Example 3 was used. (4) Adhesion of outer fabric and nanofiber nonwoven fabric The same procedure as in Example 6 was followed. (5) Attaching the lining The same procedure as in Example 5 was followed. (6) Water-repellent treatment on the outer side of the laminated fabric A non-fluorinated water repellent mainly composed of alkyl urethane was applied to the laminated fabric produced above from the outer fabric side using a gravure roll so that the water repellent was 5% OWF. After the water repellent was applied, the fabric was dried at 150°C for 90 seconds. The water repellent applied to the outer fabric was impregnated into the nanofiber nonwoven fabric surface layer, and the thickness of the water repellent layer was 38%. The coating area ratio of the water repellent was 78% when the entire area was taken as 100%. The moisture-permeable, waterproof laminated fabric thus obtained had a thickness of 0.61 mm when left at rest.

[0049] Example 8 (1) Outer fabric The outer fabric described in Example 2 was used. (2) Lining The lining fabric described in Example 1 was used. (3) Nanofiber nonwoven fabric The nanofiber nonwoven fabric described in Example 3 was used. (4) Adhesion of outer fabric and nanofiber nonwoven fabric A moisture-curing polyurethane hot melt adhesive was applied in dots to the outer fabric at 12 g / m2, and a nanofiber nonwoven fabric was placed on top of the adhesive-coated surface, which was then passed through a heated roll to press and bond the fabric together, and then rolled up. In the bonding between the outer fabric and the nanofiber nonwoven fabric, the bonding area was 60% of the total area, and the adhesive impregnation rate in the thickness direction was 40%. (5) Water-repellent treatment on the nanofiber nonwoven backing After bonding the outer fabric and the nanofiber nonwoven fabric, a water-repellent finish was applied to the back surface of the nanofiber nonwoven fabric. A non-fluorine-based water repellent agent mainly composed of alkyl urethane was applied to the back surface of the nanofiber nonwoven fabric with a gravure roll so that the water repellent agent was 5% OWF. After application of the water repellent agent, the fabric was dried at 150°C for 90 seconds. The thickness of the water-repellent layer formed on the surface of the nanofiber nonwoven fabric was 30% from the surface layer of the nanofiber nonwoven fabric. The coating area ratio of the water repellent agent was 80% when the whole was taken as 100%. (6) Attaching the lining A backing fabric was attached to the side of the nanofiber nonwoven fabric opposite to the side attached to the front fabric. A moisture-curing urethane binder was used as the adhesive, and the adhesive was applied in dots with a gravure roll at 10 g / m2, and the adhesive was fixed to obtain a laminated fabric. The adhesive area between the backing fabric and the nanofiber nonwoven fabric was 60% of the total area taken as 100%. The adhesive impregnation rate in the thickness direction was 40%. (7) Water-repellent treatment on the outer fabric side of the laminated fabric A non-fluorine-based water repellent mainly composed of alkyl urethane was applied to the laminated fabric produced above from the outer fabric side with a gravure roll so that the water repellent was 5% OWF. After the water repellent was applied, the fabric was dried at 150°C for 90 seconds. The water repellent applied to the outer fabric was impregnated into the surface layer of the nanofiber nonwoven fabric, and the thickness of the water repellent layer was 30%. The coating area ratio of the water repellent was 80% when the whole was taken as 100%. The moisture-permeable, waterproof laminated fabric thus obtained had a thickness of 0.61 mm when left at rest.

[0050] Comparative Example 1 The outer fabric was a ripstop fabric made of nylon yarn (fineness 44 decitex, 36 filaments), the inner fabric was a tricot fabric using nylon yarn, and commercially available product A, which used a polyurethane non-porous membrane instead of nanofiber nonwoven fabric, was tested.

[0051] Comparative Example 2 The outer fabric was a taffeta-woven fabric made of nylon yarn (fineness 44 decitex, 36 filaments), and instead of the nanofiber nonwoven fabric, a non-porous polyurethane membrane was used. Commercially available product B was tested, in which polyurethane resin was applied in dots instead of the lining fabric.

[0052] Comparative Example 3 We tested commercially available product C, which uses nylon multifilament yarn for the warp and weft of the outer fabric, a taffeta-woven fabric, a polyurethane non-porous membrane instead of nanofiber nonwoven fabric, and polyurethane resin applied in dots instead of the lining fabric.

[0053] Comparative Example 4 We tested commercially available product D, which uses nylon yarn for the warp and weft of the outer fabric, a taffeta-woven fabric, and uses a polytetrafluoroethylene (PTFE) membrane instead of nanofiber nonwoven fabric.

[0054] Comparative Example 5 We tested commercially available product E, which uses nylon yarn for the warp and weft of the outer fabric, a ripstop woven fabric, and nylon yarn for the inner fabric, a plain knit fabric, and uses a polytetrafluoroethylene (PTFE) membrane instead of nanofiber nonwoven fabric.

[0055] Comparative Example 6 We tested commercially available product F, which has an outer fabric made of nylon and polyurethane warp and weft threads in a ripstop structure, a lining made of polyester yarn in a jersey knit pattern, and a breathable waterproof membrane made of nanofiber nonwoven fabric, but the surface of the nanofiber nonwoven fabric has not been treated to be water repellent.

[0056] Comparative Example 7 We tested commercially available product G, which uses polyester yarn for the front and back fabrics, a plain knit fabric, and uses a polyurethane non-porous membrane instead of nanofiber nonwoven fabric. The above conditions and the results obtained are shown in Tables 1 and 2.

[0057] [Table 1]

[0058] [Table 2]

[0059] As is clear from Tables 1 and 2, it was confirmed that the moisture-permeable waterproof laminate fabric of the present invention continues to exhibit the breathability and moisture permeability of the moisture-permeable membrane not only in a dry state but also when exposed to rain and sweat while being worn.

[0060] Wearing tests were conducted by sewing garments using the moisture-permeable and waterproof laminated fabrics of Examples 1 and 2. Wearing tests were conducted using commercially available garments for Comparative Examples 1 and 2. The conditions for the wearing test are as follows: In a test room with a temperature of 20°C and a relative humidity of 65%, the temperature and relative humidity inside the clothing were measured using a temperature and humidity sensor (Hygroclone, KN Laboratories, Inc.) while running on a treadmill for 30 minutes at a speed of 10 km / hr. The absolute humidity was calculated from the obtained temperature and relative humidity using the following formula. Absolute humidity (g / m 3 )=217×6.1078×10 (7.5 × T / (T+237.3)) / (T+273.15) ×RH / 100 The temperature and humidity sensors were attached to four points on the chest, abdomen, back, and waist, and the data from the last 10 minutes of the running time was used for evaluation, and the average absolute humidity of each part was compared. The results are shown in Table 3. The clothing conditions were as follows: the top was an undershirt made of 2-way tricot knit fabric of 86% polyester and 14% polyurethane, and the measurement sample was worn on top of that. The bottom was woven shorts made of 100% polyester.

[0061] [Table 3]

[0062] As is clear from Table 3, the absolute humidity inside the garments of Examples 1 and 2 was lower than that of the garments of Comparative Examples 1 and 2. Furthermore, the garments of Examples 1 and 2 did not feel stuffy even when exposed to rain or sweat while being worn, compared to the garments of Comparative Examples 1 and 2, and were able to maintain a comfortable environment inside the garments. [Industrial Applicability]

[0063] The moisture-permeable waterproof laminated fabric of the present invention can be suitably used in clothing such as outdoor wear such as fishing and mountain climbing clothing, ski and snowboard wear, windbreakers, athletic wear, golf wear, tennis wear, rainwear, casual wear, work clothes, gloves and shoes, outer materials for down wear and padded jackets, clothing materials such as glove inserts and boot inserts, and non-clothing fields such as building materials such as wallpaper and roof waterproof sheets. [Explanation of symbols]

[0064] 1,6,9 Breathable and waterproof laminated fabric 2 Surface layer 3. Nanofiber nonwoven layer 4,8,11 Partially bonded part 5. Water-repellent layer 7 Printed Layers 10 Backing layer 12 Fiber of the surface layer 13. Glue 14 Nanofiber nonwoven fabric layer fibers 15. Moisture permeability measuring device 16 Hot plate 17 Glass Petri dish 18 boxes 19 Temperature and humidity sensor 20. Fabric 21 Wind

Claims

1. A moisture-permeable and waterproof laminated fabric in which a nanofiber nonwoven fabric layer is laminated on one side of a surface fabric layer, at least one side of the nanofiber nonwoven fabric layer is a water-repellent layer, and the surface fabric layer and the nanofiber nonwoven fabric layer are adhered by a partial adhesive portion, characterized in that it is a moisture-permeable and waterproof laminated fabric.

2. The moisture-permeable and waterproof laminated fabric according to claim 1, wherein the water-repellent layer is formed on the surface fabric layer side of the nanofiber nonwoven fabric layer.

3. A back fabric layer is further laminated on the back surface of the nanofiber nonwoven fabric layer, and the nanofiber nonwoven fabric layer and the back fabric layer are adhered by a partial adhesive portion, characterized in that it is the moisture-permeable and waterproof laminated fabric according to claim 1.

4. The moisture-permeable and waterproof laminated fabric according to claim 1, wherein the water-repellent layer has an area ratio of 10 to 100% when the fiber surface area of the surface of the nanofiber nonwoven fabric subjected to water-repellent treatment is 100%.

5. The moisture-permeable and waterproof laminated fabric according to claim 1, wherein the partial adhesive portion between the surface fabric layer and the nanofiber nonwoven fabric layer, or the partial adhesive portion between the back fabric layer and the nanofiber nonwoven fabric layer is in the range of 10 to 80% in area ratio.

6. The moisture-permeable and waterproof laminated fabric according to claim 1, wherein the water-repellent layer is a water-repellent treatment of at least one side of the nanofiber nonwoven fabric layer with a non-fluorine-based water-repellent agent.

7. The moisture-permeable and waterproof laminated fabric according to claim 1, wherein the nanofiber nonwoven fabric layer is composed of nanofibers having an average fiber diameter of 1 nm to 1,000 nm formed of thermoplastic polyurethane.

8. The moisture-permeable and waterproof laminated fabric according to claim 1, wherein in a state of being wetted with water, the air permeability resistance value is 0 to 277.5 kPa·s / m.

9. The moisture-permeable and waterproof laminated fabric has a moisture permeability of 5000 to 20000 g / m 2 ・24 h and a moisture permeability of 10000 to 100000 g / m 2 ・24 h in the dry state according to JIS L1099 A-1 method, and the moisture-permeable and waterproof laminated fabric according to claim 1, wherein the moisture permeability is 10000 to 100000 g / m

10. The moisture-permeable and waterproof laminated fabric according to claim 1, wherein the water pressure resistance before washing according to JIS L1092:2009 is 7,000 to 30,000 mm, and the water pressure resistance after 20 times of washing treatment is 5,000 to 25,000 mm.

11. The moisture-permeable and waterproof laminated fabric according to claim 1, wherein the air permeability according to the JIS L1096 frazil method is 0.01 to 2 cm3 / cm2·second.

12. The moisture-permeable and waterproof laminated fabric according to claim 1, wherein the surface fabric is water-repellent treated.

13. A method for manufacturing the moisture-permeable and waterproof laminated fabric according to any one of claims 1 to 12, A method for manufacturing a moisture-permeable and waterproof laminated fabric, characterized in that a water-repellent agent is applied and fixed to at least one side of a nanofiber nonwoven fabric layer to form a water-repellent layer, and the nanofiber nonwoven fabric layer and the surface fabric layer are partially adhered by an adhesive.

14. Clothes using the moisture-permeable and waterproof laminated fabric according to any one of Claims 1 to 12.

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