JP4518087B2 - Breathable waterproof fabric - Google Patents

Breathable waterproof fabric Download PDF

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JP4518087B2
JP4518087B2 JP2007056777A JP2007056777A JP4518087B2 JP 4518087 B2 JP4518087 B2 JP 4518087B2 JP 2007056777 A JP2007056777 A JP 2007056777A JP 2007056777 A JP2007056777 A JP 2007056777A JP 4518087 B2 JP4518087 B2 JP 4518087B2
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moisture
fabric
permeable
fiber
waterproof fabric
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JP2008213391A (en
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哲朗 古谷
雄一郎 表
右広 西田
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東洋紡績株式会社
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Description

  The present invention relates to a moisture-permeable and waterproof fabric having a fiber structure formed of ultrafine fibers excellent in moisture-permeable and waterproof performance used for various clothes such as rain clothes, mountaineering clothes, sportswear, and work clothes.

    Moisture-permeable and waterproof fabric that combines moisture permeability and waterproofness has the function of releasing water vapor from sweating from the body to the outside of clothes and the function of preventing rain from entering the clothes. Used as a material for winter clothing. In particular, it is widely used as a clothing material for sports, outdoor activities, and outside work, where sweating is relatively high during exercise, and now it is an indispensable clothing material especially in the skiing, snowboarding, athletic and mountaineering fields. It has become.

  As a fabric having both moisture permeability and waterproofness, a high-density woven fabric in which yarns are densely woven, and a resin film made of a polymer composite such as polyurethane resin, polyester resin, or polytetrafluoroethylene resin are used. It is well known that it is bonded to one side of the fabric by means of coating or laminating. Among these, those with a polyurethane-based resin film with improved hydrophilicity adhered to one side of the fabric, and those formed with a microporous polytetrafluoroethylene-based resin or polyurethane-based membrane on one side of the fabric are waterproof. It is evaluated in terms of properties and moisture permeability and is widely accepted by the market.

  Specifically, in order to form a polyurethane-based resin film with increased hydrophilicity, a method of blending a fluorine-knitted polyurethane with a water-insoluble, solvent-soluble polyalkylene oxide knitted product (see, for example, Patent Document 1) has been attempted. Yes. However, such a moisture-permeable rod water membrane has a problem in touch and durability due to swelling of the membrane surface when water is absorbed, and the moisture permeability is not sufficient.

Further, a moisture-permeable and waterproof fabric in which microporous polytetrafluoroethylene films are laminated is also disclosed (see, for example, Patent Document 2). These have excellent water resistance and moisture permeability, but are difficult to apply to fabrics that require stretchability due to their firm texture and insufficient stretchability.
In addition, a method of forming a microporous polyurethane film directly on one side of a fabric by coating by a wet coagulation method (see, for example, Patent Document 3) or a moisture-permeable waterproof property by bonding a microporous polyurethane film formed by the same method A method for obtaining dough (for example, see Patent Document 4) has been announced. However, these are also water resistant. The moisture permeability is not sufficient. Thus, the moisture permeable waterproof fabric which is excellent in water resistance and moisture permeability and also has stretch properties has not been obtained.
Japanese Patent Laid-Open No. 11-49875 JP-A-4-41778 Japanese Patent Publication No. 60-47955 JP 58-166036 A

  The present invention has been achieved as a result of diligent investigation against the background of such circumstances, and has excellent moisture permeability and waterproofness used for various clothes such as rain clothes, mountaineering clothes, sportswear, work clothes, and the texture. It is an object of the present invention to provide a moisture-permeable and waterproof fabric excellent in water resistance.

As a result of diligent research to solve the above problems, the present inventors have finally completed the present invention. That is, the present invention is (1) a water structure having an average fiber diameter of 0.01 to 1 μm and laminated with at least one layer base material, and has a water resistance of 50 kPa or more and moisture permeability. 8000 g / m 2 · 24 hr or more, breathable and waterproof fabric with air permeability of 0.2 cc / m 2 · s or more, (2) The fiber structure comprising the ultrafine fibers has a thickness of 2 μm to 30 μm, and the elongation at break is The moisture-permeable and waterproof fabric according to (1), wherein the modulus when stretched by 50% or more in both the vertical and horizontal directions and 20% is 0.7 to 3.0 N in both the vertical and horizontal directions. (3) The moisture-permeable and waterproof fabric according to (1) or (2), wherein the ultrafine fiber is formed from a polymer mainly composed of a polyurethane polymer, and (4) from the ultrafine fiber. The fiber structure is a non-woven fabric (1) to (3) characterized in that the moisture permeable waterproof fabric according to any one of (1) to (3), (5) a fiber structure comprising the ultrafine fibers is formed by a charged spinning method, 4) The moisture-permeable waterproof fabric according to any one of the above, (6) the fiber structure comprising the ultrafine fibers and the fabric bonded together by lamination, and the permeability according to any one of (1) to (5) Moist waterproof fabric.

  The moisture-permeable and waterproof fabric of the present invention is a fabric excellent in moisture permeability and waterproofness, and also excellent in texture due to the excellent flexibility and elongation characteristics of the laminate. Therefore, it is very useful as a fabric for various clothes that require elasticity such as rain clothes, mountaineering clothes, sportswear, work clothes, and the like.

The present invention will be specifically described below.
The moisture permeable and waterproof fabric of the present invention is formed by laminating a fiber structure composed of ultrafine fibers having an average fiber diameter of 0.01 to 1 μm on at least one layer base material, having a water resistance of 50 kPa or more and a moisture permeability of 8000 g / It is preferably a moisture-permeable and waterproof fabric having an air permeability of 0.2 cc / m 2 · s or more and m 2 · 24 hours or more. If the water pressure resistance is 50 kPa or more, practically sufficient waterproof performance can be secured. In addition, if the moisture permeability is 8000 g / m 2 · 24 h or more and the air permeability is 0.3 cc / m 2 · s or more, the comfort in the state of being worn as clothes and active is increased. In particular, the effect on comfort when sweating is low. And the micropore which expresses moisture permeability waterproofness is formed substantially by the ultrafine fiber structure which exhibits moisture permeability waterproofness being comprised from ultrafine fiber with an average fiber diameter of 0.01-1 micrometer. On the other hand, as compared with the conventional moisture-permeable waterproof membrane, the texture is remarkably improved, and further, it is difficult to propagate the defects, so that the useful period of use is extended. A more preferable average fiber diameter is 0.05 to 0.8 μm, still more preferably 0.1 μm to 0.5 μm.

  The water resistance can be increased by adjusting the film thickness, but the texture becomes stiff. Further, when the water resistance is increased, moisture permeability and air permeability tend to decrease. Taking this point into consideration, the water resistance is more preferably 500 kPa or less.

The moisture permeable and waterproof base fabric of the present invention has a fiber structure composed of the ultrafine fibers having a thickness of 2 μm to 30 μm, an elongation at break of 50% or more in both the vertical and horizontal directions, and a modulus at 20% elongation. It is preferable that it is 0.7-3.0N in a length direction and a horizontal direction. This is because, within such a range, excellent wear comfort, particularly a stretchable fabric can be obtained without impairing the workability, water resistance, moisture permeability and strength required for practical use. More preferably, the elongation is 60% or more in both the vertical direction and the horizontal direction, and the thickness is 3 μm to 25 μm.

  Examples of the material of the fiber structure composed of the above-mentioned ultrafine fibers used in the moisture-permeable and waterproof fabric of the present invention include a polyurethane polymer, a polyester polymer, a polyamide polymer, an acrylic polymer, a silicon polymer, and a polyolefin polymer. A polymer, a polyimide-type polymer, etc. are mentioned. In consideration of physical properties, moisture properties, and flexibility, polyurethane polymers are more desirable.

  Specific examples of the fiber structure used in the moisture-permeable and waterproof fabric of the present invention include knitted fabrics, woven fabrics, and nonwoven fabrics, with nonwoven fabrics being particularly preferred. This is because if it is a non-woven fabric, fine holes are formed three-dimensionally and the flexibility and texture are excellent.

Although the manufacturing method of the said fiber structure used for the moisture-permeable waterproof fabric of this invention is not specifically limited, It is preferable to spin by a charge spinning method. With this method, it is possible to produce nano-sized fibers that could not be produced conventionally. By laminating these ultrafine fibers in the thickness direction, a porous laminate having excellent waterproofness and moisture permeability and excellent extensibility can be produced. These porous laminates can obtain air permeability in addition to excellent water resistance and moisture permeability as compared with conventional porous membranes.
It is possible to manufacture the same laminate by laminating the yarn obtained by the composite spinning method into a non-woven fabric, and subjecting the matrix layer to a cleaning process or a split line process, but this is a complicated process and is very complicated. In addition, the cost spinning method is also an advantageous manufacturing method in terms of cost.

  In addition, the ultrafine fibers located on the surface of the laminate are randomly oriented by the charge spinning method, so that the touch of the surface is not sticky and smooth despite the laminate of polymers with high viscoelasticity such as polyurethane. It is confirmed. Also from these things, the one formed by charge spinning is preferable as a laminate for moisture-permeable and waterproof fabric.

  In the case of a laminate by charge spinning, depending on the lamination state, the friction durability may be inferior, but even in that case, it can be improved by subjecting the laminate to a hot press treatment. This process may be performed in the state of a laminated body, or may be performed after bonding to the fabric.

  It is desirable that the fiber structure composed of the ultrafine fibers used in the moisture-permeable and waterproof fabric of the present invention and the substrate are bonded together by a laminating process. There is a method in which an adhesive is uniformly applied to the entire surface of the film or a non-overall surface by a gravure method, a rotary printing method, or the like, and is bonded to the fabric by pressure bonding. In order to make better use of the characteristics of the fiber structure formed of ultrafine fibers, it is desirable from the viewpoint of moisture permeability and texture to use a method in which an adhesive is uniformly applied to the entire surface. For example, it is desirable to apply an adhesive in a dot shape or a lattice shape.

  Moreover, you may affix a cloth | dough for the purpose of the durability improvement at the time of use, after adhere | attaching the fiber structure which consists of an ultrafine fiber. As the fabric, a thin tricot or a thin woven fabric does not increase in thickness, and it is easy to perform seam tape processing at the time of sewing. For the same purpose, a top coat layer made of moisture-permeable urethane or the like may be placed on the surface of the nanofiber laminate, or urethane printing may be performed in a pattern.

  The moisture-permeable and waterproof fabric obtained by the present invention may be subjected to water repellent treatment for the purpose of improving waterproofness. This step may be performed at the fabric stage or after the nanofibers are bonded to the fabric.

  The substrate used in the moisture-permeable and waterproof fabric of the present invention may be woven fabric or knit such as circular knitting or warp knitting. In the case of a woven fabric, it is possible to obtain a product excellent in strength and abrasion as in the case of a moisture permeable and waterproof fabric conventionally used. In the case of knitwear, moisture permeability and waterproofness can be obtained without impairing the stretchability and soft texture of the material.

  The base material used in the present invention may be synthetic fiber or natural fiber. Considering the waterproof performance as a fabric, a fabric mainly composed of synthetic fibers is preferable. Synthetic fibers include polyester fibers such as polyethylene terephthalate, polytrimethylene terephthalate and polybutylene terephthalate, polyamide fibers such as nylon 6 and nylon 66, polyolefin fibers such as acrylic fiber, polypropylene and polyethylene, polyurethane fibers and polyimide fibers. Conceivable. The dough made by these alone or in combination is raised.

EXAMPLES Next, although this invention is demonstrated concretely using an Example and a comparative example, this invention is not limited to these.
The evaluation of the fabric of the present invention is measured by the following method.

  Water resistance: JIS L1092 Method B

  Moisture permeability: JIS L1099 A-1 method

  Air permeability: JIS L1096 A method

  Fiber warp: A surface photograph of a laminate formed of nanofibers was taken with a scanning electron microscope (SEM), 20 diameters were measured at random, and an average value was calculated.

  Thickness of the fiber structure: Measured with an electronic micrometer Millitron 1202D (manufactured by Mahr)

Elongation at break, modulus: JIS L1096 quasi-use The elongation at break and the modulus at 20% elongation were measured by the low-speed elongation method.
Tensile speed: 20 cm / min 10 cm between grips x 5 cm wide

(Fiber structure production examples 1 to 3)
Polyurethane polymer is dissolved in dimethylacetamide and adjusted so that the concentration of the solution is 50 mg / mL, coating speed is 10 mL / h · Nz, applied voltage is 23 kV, and distance between nozzle and release paper is set to 25 cm. Then, charge spinning was performed, and lamination was repeated to create an ultrafine fiber structure. This ultrafine fiber structure was subjected to a hot press treatment (about 120 ° C.) together with the release paper, and peeled off from the release paper to prepare an ultrafine fiber structure. By the same method, an ultrafine fiber structure was prepared, and a laminate (ultrafine fiber structure) with three kinds of thickness was made by changing the number of times of lamination.
(Comparative Example 1)
A polyurethane polymer copolymerized with polyethylene oxide as a hydrophilic component is dissolved in dimethylacetamide, applied to a release paper with a uniform thickness by a comma coater, further dried at 80 ° C. for 10 minutes, and the release paper is peeled off. A polyurethane-based nonporous film was made.

(Comparative Example 2)
Polytetrafluoroethylene resin mixed with lubricant to shear deformation is caused film form made polytetrafluoroethylene-based multi-porous film by further heat treatment.

The performance comparison between the laminate and the film is shown in Table 1.

(Base Material Production Example 1)
Weaving a 1/2 twill fabric with a warp density of 170 yarns / inch and a weft density of 110 yarns / inch using polyester multifilament processed yarn 56 dtex / 96 filaments for both warp and weft yarns, and refining, dyeing and drying by ordinary methods The substrate for adhesion was obtained.

(Examples 1-3)
Using a gravure roll, a hot-melt type ester polyurethane adhesive was uniformly applied to the fiber structure produced in the above (Fibre Structure Production Examples 1 to 3), and the above (Base Material Production Example 1). After laminating the obtained base material for adhesion, applying a pressure of 2 kgf / cm 2 with a 120 ° C. roller and leaving it to stand for 2 days, mangle pad-drying treatment with a fluorine-based water repellent aqueous solution, finishing Setting was performed to obtain a moisture-permeable and waterproof fabric.

Example 4
Nylon multifilament 78 dtex / 96 filaments are used for both warp and weft, weaving a plain weave with a warp density of 120 yarns / inch and a weft density of 100 yarns / inch. A base material was obtained. About the process after that, it carried out by the method similar to Example 1, and obtained the moisture-permeable waterproof fabric.

(Example 5)
A half-structured 2WAY tricot was prepared using a 44 dtex polyether-based polyurethane yarn manufactured according to a conventional method and a 50 dtex / 36 filament polyester multifilament using a 32 gauge tricot knitting machine. Subsequently, refining, dyeing, and finishing set were performed by a normal method to obtain a base material for adhesion. The density of this equipment was 110 courses / inch and 65 wales / inch. About the process after that, it performed by the method similar to Example 1, and obtained the moisture-permeable waterproof fabric

Table 2 shows the performance of the dough.

The moisture-permeable and waterproof fabric of the present invention is excellent in waterproofness and moisture permeability, and has air permeability that is difficult with conventional moisture-permeable and waterproof membrane materials. In addition, the fabric was excellent in extensibility and flexibility, and very comfortable to wear.

  According to the present invention, it becomes possible to provide a fabric having excellent moisture permeability, waterproofness and flexibility useful for various clothing such as rain clothing, mountaineering clothing, sportswear, work clothes, etc. is there.

Claims (5)

  1. Ri Do polyurethane polymer from ultrafine fibers having an average fiber diameter 0.01~1μm that the material thickness of 2-30 m, elongation at break longitudinal direction, transverse direction both 50% or more, at 20% elongation modulus longitudinal direction, the fiber structure is at least one layer formed by a charged spinning is 0.7~3.0N the transverse direction both to be formed by stacking on a substrate consisting of woven or knitted synthetic fibers mainly A moisture permeable and waterproof fabric having a water resistance of 50 kPa or more, a moisture permeability of 8000 g / m 2 · 24 hr or more, and an air permeability of 0.2 cc / m 2 · s or more.
  2. 2. The moisture-permeable and waterproof fabric according to claim 1, wherein an average fiber diameter of the ultrafine fibers is 0.05 μm or more and 0.2 μm or less (excluding 0.2 μm).
  3. The moisture permeable waterproofing according to claim 1 or 2, wherein the fiber structure is a porous laminate in which ultrafine fibers are laminated in the thickness direction, and is subjected to a hot press treatment before being laminated on a substrate. Sex fabric.
  4.   The moisture-permeable and waterproof fabric according to any one of claims 1 to 3, wherein the fiber structure composed of the ultrafine fibers is a nonwoven fabric.
  5. The moisture-permeable and waterproof fabric according to any one of claims 1 to 4, wherein a fiber structure composed of the ultrafine fibers and a substrate are bonded together by lamination.
JP2007056777A 2007-03-07 2007-03-07 Breathable waterproof fabric Active JP4518087B2 (en)

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JP2007056777A JP4518087B2 (en) 2007-03-07 2007-03-07 Breathable waterproof fabric
PCT/JP2008/053923 WO2008108393A1 (en) 2007-03-07 2008-03-05 Moisture-permeable waterproof cloth

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5268730B2 (en) * 2008-03-28 2013-08-21 グンゼ株式会社 Composite fabric
JP5363145B2 (en) * 2009-03-04 2013-12-11 帝人フロンティア株式会社 Moisture permeable waterproof fabric and textile products
JP5393502B2 (en) * 2009-03-19 2014-01-22 グンゼ株式会社 Composite fabric, apparel comprising the composite fabric, and method for producing the composite fabric
JP5909612B2 (en) * 2012-11-19 2016-04-27 ケーシーアイ・ワープニット株式会社 Breathable waterproof fabric and clothes
WO2015003170A2 (en) * 2013-07-05 2015-01-08 The North Face Apparel Corp. Forcespinning of fibers and filaments

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008036985A (en) * 2006-08-08 2008-02-21 Kurashiki Seni Kako Kk Laminated sheet excellent in windproof and moisture-permeable waterproof properties, cloth using same, and their production methods

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008036985A (en) * 2006-08-08 2008-02-21 Kurashiki Seni Kako Kk Laminated sheet excellent in windproof and moisture-permeable waterproof properties, cloth using same, and their production methods

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