JP2005206972A - Waterproof and moisture-permeable fabric - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide novel waterproof and moisture-permeable fabric excellent in use durability, and maintaining comfortability even when worn for a long time: and to provide a method for producing the same. <P>SOLUTION: The waterproof and moisture-permeable fabric has a waterproof and moisture-permeable layer on one side surface, and partial piling uniformly arranged on the side of the waterproof and moisture permeable layer: wherein a water-resistant pressure is ≥10 kPa and moisture permeability detected according to the regulation of the JIS L 1099 A-1 method is ≥2,500 g/m<SP>2</SP>×24 hr. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

    The present invention relates to a novel waterproof and moisture-permeable fabric that is suitably used for sports clothing, rain clothing, and the like and has excellent durability for use and retains comfort even when worn for a long time.

    As reported in Japanese Examined Patent Publication No. 60-47954, a conventional waterproof and moisture-permeable fabric is mainly a wet gel obtained by coating a fabric with a polyurethane solution obtained by dissolving a polyurethane resin in a water-soluble solvent. The porous polyurethane film formed on the fabric when the solvent is replaced with water prevents rain and other water from passing through, and allows moisture (water vapor) to pass through.

    However, the conventional porous membrane has a problem that once dew condensation occurs on the membrane surface and in the porous membrane, a feeling of stickiness is produced and comfort is significantly reduced.

On the other hand, a method of applying a hydrophilic resin to the film surface is disclosed in JP-A-6-73669, a method of applying a hydrophilic inorganic fine powder to the film surface is disclosed in JP-A-2001-303452, and A method of planting a pile having an official moisture content of 3% or more is reported in Japanese Patent Laid-Open No. 05-147139.
JP-A-6-73669 JP 2000-303452 A JP-A-5-147139

  However, in the above method, once absorbed moisture is not easily released, and the moisture absorption performance becomes saturated during wearing, so that there is a problem that the sticky feeling on the film surface is not eliminated when wearing for a long time. there were. Moreover, since the hydrophilic component exposed on the surface of the film is peeled off or dropped off due to moisture generated at the time of wearing or moisture at the time of washing, there is a problem that the use durability of the anti-condensation performance is remarkably lowered.

  In view of the background of such conventional technology, the present invention is intended to provide a novel waterproof and moisture-permeable fabric that is excellent in durability for use and maintains comfort even when worn for a long time.

The present invention employs the following means in order to solve such problems.
That is, it has a waterproof and moisture permeable layer on one side of the fabric, a part of the waterproof and moisture permeable layer has an arrangement of napped bundles, a water pressure resistance of 10 kPa or more, and an A-1 moisture permeability of 2,500 g / m. A waterproof and moisture-permeable fabric characterized by having a length of ² · 24 hrs or more.

  According to the present invention, it is possible to provide a novel waterproof and moisture-permeable fabric that is excellent in durability for use and maintains comfort even when worn for a long time.

  The base material used in the waterproof and moisture-permeable fabric of the present invention can be appropriately selected according to the purpose of use, such as woven fabric, knitted fabric, and non-woven fabric.

  The fibers used for the substrate are represented by polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyester-based synthetic fibers typified by copolymerized polyester fibers based on these, and nylon 6 and nylon 6,6. Preferably used are synthetic fibers such as polyamide-based synthetic fibers, polypropylene-based synthetic fibers, semi-synthetic fibers typified by acetate fibers, natural fibers typified by cotton, hemp and wool, or a mixture of two or more kinds. The

  The waterproof and moisture-permeable fabric of the present invention has a waterproof and moisture-permeable layer formed of a porous film and / or a moisture-permeable non-porous film on one side, and a napped bundle is disposed on a part of the waterproof and moisture-permeable layer surface. It has been made.

  With respect to the waterproof property of the waterproof and moisture-permeable fabric of the present invention, the water pressure resistance needs to be 10 kPa or more from a practical viewpoint. If the pressure is less than 10 kPa, the water pressure caused by exercise, seating, rainfall with strong wind, and the like cannot maintain waterproofness and cause water leakage of the fabric, so the effects of the present invention cannot be obtained.

  The waterproof property is obtained by a waterproof layer formed of a resin that does not pass water (leakage). Examples of the resin include polyester copolymer-based, polyether copolymer-based or polycarbonate copolymer-based polyurethane-based resins, polyurethane-based resins copolymerized with amino acids, silicone-based resins, fluorine-based resins, acrylic-based resins, and synthetic rubbers. A vinyl resin typified by polyvinyl chloride is preferably used.

On the other hand, regarding the moisture permeability of the waterproof and moisture permeable fabric of the present invention, the A-1 moisture permeability needs to be 2,500 g / m ² · 24 hrs or more from a practical viewpoint. If it is less than 2,500 g / m ² · 24 hrs, a feeling of stuffiness will occur when worn, and the effect of the present invention cannot be obtained.

    In order to impart moisture permeability capable of achieving the present invention, a microporous film mainly composed of urethane, a nonporous film mainly composed of urethane having moisture permeability, and a microporous film mainly composed of polytetrafluoroethylene Nonporous membranes mainly composed of a porous membrane or a polybutylene terephthalate having moisture permeability are preferably used.

  It is also preferable to further laminate a non-porous film having moisture permeability on the microporous film.

  In the present invention, as the nap bundle component, natural fibers, semi-synthetic fibers and synthetic fibers can be used, but the official moisture content is low in terms of achieving a dry feeling when worn, polyethylene terephthalate, polytrimethylene terephthalate, Synthetic fibers such as polybutylene terephthalate and polyester-based synthetic fibers typified by copolymerized polyester fibers based on these, polyamide-based synthetic fibers typified by nylon 6 and nylon 6,6, and polypropylene-based synthetic fibers are preferably used. The

  In addition, the length of the fibers constituting the napped bundle can be used as long as it is in the range of about 0.2 to 8.0 mm used for normal flocking, but the quality, dry feeling, productivity, workability and From the viewpoint of avoiding the dust problem, it is preferably in the range of 0.3 to 2.0 mm.

  About the single yarn fineness of the fiber which comprises this napped bundle, a thin thing is preferable from the point of wearing feeling, and the thing of the range of about 0.5-1.6 decitex is used preferably. Further, from the viewpoint of gloss and texture, triangular or star-shaped atypical cross-section fibers can also be used.

  In the present invention, the method for implanting the napped bundle into a part of the fabric is not particularly limited, and a known method can be used. For example, using an apparatus such as a rotary screen, knife roll coater, gravure roll coater, kiss roll coater, calendar coater, etc., the adhesive resin is applied to the waterproof and moisture-permeable layer surface, and after applying the pattern paper, the adhesive resin is not dried. During the state, it can be performed by so-called flocking process in which the nap component is fixed to the adhesive resin by means of static electricity, spraying, spraying, vibration, or the like.

  As the adhesive resin, a solvent-based or emulsion-based urethane resin, an amino acid resin, an acrylic resin, and the like are preferably used, and an acrylic resin is particularly preferably used because it can achieve a dry feeling and durability.

  As conditions for the flocking process by static electricity, an electrode interval of 5 to 20 cm, a voltage of 20 to 60 kV, and a current of about 0.1 to 0.5 mA are preferable.

  In the present invention, the arrangement of napped bundles can be any of a continuous pattern, a discontinuous pattern, or a pattern having both a continuous pattern and a discontinuous pattern, and is appropriately selected from the viewpoint of design. be able to. Examples of the continuous pattern include a lattice pattern (see FIG. 2), and examples of the discontinuous pattern include a polka dot pattern (see FIG. 1).

  Further, the covering area of the napped bundle is preferably in the range of 10 to 60% from the viewpoint of dry feeling and moisture permeability in addition to the design properties.

EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to these Examples. In addition, the quality evaluation in an Example followed the following method.
-Water pressure resistance According to JIS L 1092.
-Moisture permeability According to JIS L 1099 (A-1 method). However, the test specimen was left in the constant temperature and humidity apparatus for 24 hours.
-Dry feeling A windbreaker is made as a trial using the waterproof and moisture-permeable fabric obtained in the following examples and comparative examples, and wearing evaluation is performed by five men. With a running shirt and windbreaker worn, the platform raised and lowered (100 steps / minute) for 30 minutes in an environment of temperature 15 ° C and humidity 60% RH. Evaluate feeling. The judgment criteria are the following four stages, and the average value of five people is calculated.

4: No stickiness 3: Little stickiness 2: Slightly sticky 1: Very sticky Example 1
78 dtex, 210 nylon filament taffeta dyed cloth, (1) Asahi Guard AG-710 (water repellent: Asahi Glass Co., Ltd.) immersed in 3 wt% aqueous dispersion (2) Drawing rate with mangle Squeezed at 40% (3) Drying was performed at 120 ° C. for 20 seconds using a heat setter. The obtained fabric was used as a base fabric.

(1) A polyurethane solution having the composition shown in Formula 1 below was applied to the base fabric at a coating amount of 130 g / m ^{2 using} a knife over roll coater. (2) A 30 ° C. coagulating liquid consisting of a 10 wt% aqueous solution of DMF. 3 minutes immersion, wet coagulation (3) Soak in warm water at 60 ° C for 10 minutes, squeeze in mangle (4) Dry at 120 ° C for 3 minutes (5) Asahi Guard AG-710 (water repellent, manufactured by Asahi Glass Co., Ltd.) (6) Squeeze with mungle at a squeeze rate of 40% (7) Dry heat treatment at 160 ° C. for 2 minutes with a heat setter to waterproof the porous membrane A waterproof and moisture-permeable fabric A having a layer on one side was obtained.
[Prescription 1]
-Crisbon 8166: 100 parts by weight (polyester polyurethane solution, manufactured by Dainippon Ink & Chemicals, Inc.)
・ Bernock D500: 1 part by weight (block isocyanate, manufactured by Dainippon Ink & Chemicals, Inc.)
・ Silysia # 350: 5 parts by weight (porous silica gel, manufactured by Fuji Silysia Chemical Co., Ltd.)
DMF: 50 parts by weight Next, an acrylic emulsion adhesive B having the composition shown in the following prescription 2 is applied to the waterproof and moisture permeable membrane of the waterproof and moisture permeable fabric A with a polka dot pattern with a covering area of 25% and 20 mesh (discontinuous) Screen) to a thickness of about 0.15 mm, in an undried state, 15 cm between electrodes, voltage 40-50 kV, current 0.1 mA, nylon pile (single yarn fineness 1. 1 dtex, 0.5 mm in length) is electrostatically implanted, dried at 120 ° C. for 3 minutes, and then subjected to a drying process at 150 ° C. for 2 minutes with a heat setter to obtain a waterproof and moisture-permeable fabric having nap on the membrane surface Obtained.
[Prescription 2]
Boncoat R-137: 100 parts by weight (acrylic emulsion, manufactured by Dainippon Ink & Chemicals, Inc.)
Boncoat crosslinker A: 3 parts by weight (melamine cross-linking agent, manufactured by Dainippon Ink & Chemicals, Inc.)
・ Catalyst 376: 0.3 part by weight (Catalyst for melamine crosslinking agent, manufactured by Dainippon Ink & Chemicals, Inc.)
-25% ammonia water: 1 part by weight Table 1 shows the evaluation results of the waterproof and moisture-permeable fabric having nap bundles on the obtained membrane surface. The water pressure resistance, moisture permeability, and dry feeling were excellent.
Example 2
The same treatment as in Example 1 was performed except that the acrylic emulsion adhesive B was screen-printed with a screen having a covering area of 50% and a mesh pattern of 20 mesh (having a continuous pattern of intersecting lines).

Table 1 shows the evaluation results of the waterproof and moisture-permeable fabric having nap bundles on the obtained membrane surface. The water pressure resistance, moisture permeability, and dry feeling were excellent.
Example 3
Apply a 15 g / m ² coating of a polyurethane solution having the composition shown in Formula 3 below to the waterproof and moisture-permeable fabric A in a floating manner, dry at 80 ° C. with hot air, and then heat set at 160 ° C. for 30 seconds. As a result, a waterproof and moisture-permeable fabric C having a waterproof and moisture-permeable layer of a porous film, on which a non-porous film having moisture permeability was laminated, was obtained.
[Prescription 3]
Heimlen Y-262: 100 parts by weight (polyether polyurethane solution, manufactured by Dainichi Seika Kogyo Co., Ltd.)
-MEK: 25 parts by weight-Toluene: 25 parts by weight Next, an electrostatic flocking treatment similar to that of Example 1 was performed on the waterproof and moisture-permeable membrane of the waterproof and moisture-permeable fabric C in which a non-porous membrane having moisture permeability was laminated. went.

Table 1 shows the evaluation results of the waterproof and moisture-permeable fabric having nap bundles on the obtained membrane surface. The water pressure resistance, moisture permeability, and dry feeling were excellent.
Comparative Example 1
Table 1 shows the evaluation results of the waterproof and moisture-permeable fabric A before the electrostatic flocking treatment. Although the water pressure resistance and moisture permeability were excellent, the dry feeling was not satisfactory.
Comparative Example 2
Table 1 shows the evaluation results of the waterproof and moisture-permeable fabric C before the electrostatic flocking treatment. Although the water pressure resistance and moisture permeability were excellent, the dry feeling was not satisfactory.

The schematic diagram in case a napped bundle is arrange | positioned discontinuously is shown. The schematic diagram in case a napped bundle is arrange | positioned continuously is shown.

Claims (8)

A waterproof and moisture-permeable layer is provided on one side of the fabric, a part of the waterproof and moisture-permeable layer has napped bundles, water pressure is 10 kPa or more, and A-1 moisture permeability is 2,500 g / m ² · 24 hrs. A waterproof and moisture-permeable fabric characterized by the above. The waterproof and moisture-permeable fabric according to claim 1, wherein the arrangement of the napped bundles has a continuous pattern. The waterproof / breathable fabric according to claim 1, wherein the arrangement of the napped bundles has a discontinuous pattern. The waterproof and moisture-permeable fabric according to claim 1, wherein the arrangement of the napped bundles has both a continuous pattern and a discontinuous pattern. The waterproof and moisture-permeable fabric according to any one of claims 1 to 4, wherein a covering area of the napped bundle is in a range of 10 to 60%. The waterproof and moisture-permeable fabric according to any one of claims 1 to 5, wherein the length of the fibers constituting the napped bundle is in the range of 0.3 to 2.0 mm. The waterproof and moisture-permeable fabric according to any one of claims 1 to 6, wherein the waterproof and moisture-permeable layer is a porous membrane. The waterproof and moisture-permeable fabric according to any one of claims 1 to 6, wherein the waterproof and moisture-permeable layer is a laminated film of a porous film and a non-porous film having moisture permeability.

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