KR100497634B1 - Manufacturing method of breathable waterproof fabric - Google Patents

Abstract

The present invention was prepared by adding 0.2 to 0.5 parts of chitosan powder to 100 parts of polyurethane resin when preparing a polyurethane film in laminating a moisture-permeable polyurethane film after dyeing the polyester twisted and twisted fabric. It is a method of manufacturing a moisture-permeable waterproof fabric, characterized in that the lamination using a film.

The present invention can be produced by the moisture absorption and porosity of the chitosan sweat and moisture absorption is easy to produce a comfortable and soft texture breathable waterproof fabric.

Description

Manufacturing method of breathable waterproof fabric

The present invention is to increase the pores in the coating resin layer and to induce moisture absorption, hydrophilization of the coating surface in order to improve the comfort of the moisture-permeable waterproof product which is recently spotlighted as a functional sports material, moisture permeability to discharge condensation and sweat in the body It relates to a method of manufacturing a moisture-permeable waterproof fabric to be improved.

In more detail, in general, moisture-permeable waterproof products, which are mainly developed for synthetic fibers such as polyester and nylon, have waterproofness, water repellency, moisture permeability, and breathability determined by characteristics and processing methods of polyurethane resins used for coating. The moisture permeability of the conventional dry laminating moisture-permeable waterproof product is basically based on the capillary principle, which gives a comfortable feeling to the human body by releasing sweat droplets liquefied through the fine pores. There was a problem that the loss of practically lost comfort.

In order to solve this problem, a method of forming porous films having a high density of 0.1 to 0.001 μ size is formed on the film to obtain a moisture permeation effect due to porosity, but this method is difficult to generalize due to difficult processing methods and high processing costs. As a method using a general polyurethane resin, as shown in Japanese Patent Laid-Open No. 56-26077 and Japanese Patent Laid-Open No. 2-251672, the coating resin is coated on the fiber by water-repellent treatment with urethane and other polymers (fluorine-based, silicone-based) In order to prevent deep penetration, the moisture permeability and flexibility are improved, and a method of improving moisture permeability by using an inorganic filler which can form pores of less than 15OÅ such as silica, titanium chloride, and alumina together with a urethane resin is proposed. It was.

However, the method of maintaining a constant interval by suppressing the penetration of the coating resin into the fiber has a moisture permeability improvement effect, while the adhesive strength is poor, causing problems in the durability of the laundry. In addition, the method of improving the moisture permeability by the inorganic pillar results in functional variation such as surface texture, waterproofness and moisture permeability after processing due to the high cohesiveness of the inorganic pillar, and condensation that forms sweat during intense exercise due to insufficient moisture absorption effect after coating processing. There is a problem that occurs.

An object of the present invention is to contain the chitosan powder (molecular weight of about 40,000) having excellent hygroscopicity and antimicrobial properties in the laminating resin composition to absorb moisture on the surface well and to quickly discharge the absorbed sweat to the outside to generate condensation phenomenon. The present invention provides a method for producing a moisture-permeable waterproof fabric with excellent moisture absorption and discharge of sweat.

In the present invention, a polyester fabric woven using 75 denier polyester micro twisted yarn as a warp yarn and 150 denier grade twisted yarn as a weft yarn was used. The fabric was dyed using a dye having excellent stability with respect to a solvent such as toluene or acetone used in dry laminating coating, and a polyester fabric having a high-density soft texture was produced through a refinement reduction process and a weight loss.

After dyeing, water-repellent treatment was performed to prevent the penetration of the laminating resin into the fiber.The water-repellent agent is a fluorine-based (Japan, Seiko Chemical Co., Ltd., product name: Luckguard AG-950, solid content 18%). It was padded at a rate and dried at 110 ° C. for 90 seconds and then heat treated at 170 ° C. for 60 seconds to minimize the penetration of the laminating resin into the fabric.

The resin used for laminating resin is a polyurethane one-component resin (adhesive, Seiko Chemical Co., Ltd., product name: Luckskin UD-108-2) with strong adhesive force and moisture permeability. The composition of the adhesive layer resin solution is as follows.

Composition of Adhesive Layer Resin

Adhesive resin: 100 parts

Catalyst: 1-2 parts

Curing agent: 5-10 parts

Toluene: 40-50 parts

DMF: 15 parts

At this time, the thickness of the adhesive layer was 12㎛, the weight was about 80g / m ² wet, the viscosity was adjusted to about 10,000CPS and processed.

The resin composition of the laminating film for improving the moisture permeability of the surface layer is as follows.

Resin Composition of Film

Surface resin: 100 parts

Chitosan: 0.2-0.5 parts

Acetic acid: 1g / kg

Toluene: 20-30 parts

MEK: 20-30 parts

The surface resin (Japan, Seiko Chemical Co., Ltd., product name: Luckskin U-2506) has a hydrophilic segment, and a product of 25% solids and 100% Modulus 42 is used, and chitosan (Sungsan Chemical) Note), brand name: Chitosan) A 2% diluent with a pH of 4.0 or less was used with a molecular weight of 30,000-44,000. The chitosan diluent was sufficiently stirred at about 1,300 times / minute for 30 minutes to completely disperse the chitosan, and then a moisture-permeable laminating film was prepared and bonded to the fabric surface. The film had a thickness of about 5-10 μm and a weight of about 35-55 g / m ² .

The drying conditions were a heat treatment equipment equipped with a three-stage oven to prevent sufficient drying and curing of the film. The drying temperature of the initial surface layer film was about 15-20m / min at 75-95 ℃ to prevent pinholes in the film layer. It dried at a speed, and the drying conditions of the adhesive layer resin were dried by slow cooling to 110 ℃ starting from 110 ℃ to maintain the proper viscosity of the resin layer and the adhesive layer.

Adhesion of the film layer and the fabric was carried out under a three-stage heat treatment temperature of 70-80 ° C. to prepare a highly functional breathable product.

Example 1

After weaving into plain weave using warp 75/72 twisted yarn and weft 150/192 twisted yarn, refining and dyeing were performed and treated with 3% water repellent (Luckguard AG-950, solid content 18%) for water repellent pretreatment.

The laminating film was prepared by using 10 g of chitosan 2% diluent in combination with 100 parts of polyurethane and adding 1 g / kg of acetic acid to 100 parts of polyurethane using a three-stage heat treatment facility, and then preparing 20 parts of toluene and MEK, which were solvents, and stirred sufficiently. The surface layer resin was coated on a release paper and dried at 75 ° C., and then a hardened solution, a catalyst, a solvent, and the like were adhered to 100 parts of the adhesive resin at an appropriate ratio, followed by drying at 100 ° C. with slow cooling. The pretreated fabric was combined with a film prepared as described above, and the release paper was peeled off to prepare a highly functional moisture-permeable fabric.

The results of the functional and other properties for the fabrics produced are shown in Table 1.

Example 2

Preparation was carried out as in Example 1, except that pretreatment with a water repellent 0.5%.

The results are shown in Table 1.

Example 3

The same water repellent pretreatment as in Example 1 was carried out on the woven and processed fabrics as in Example 1, and the adhesive and surface layer resin liquids were prepared under the same conditions, and left at room temperature for 1 hour. Peeled off.

The results are shown in Table 1.

Comparative Example 1

After the same woven fabrics were subjected to the same pre-treatment of water repellent fabrics as in Example 1, the resin solution without chitosan was added to the pre-treated fabrics to prepare a moisture-permeable fabric. The results are shown in Table 1.

Comparative Example 2

The pretreatment water repellency was omitted in the conditions of the comparative example 1, and it was carried out by the compound processing with the same resin liquid composition. The results are shown in Table 1.

Comparative Example 3

The surface layer drying conditions of the conditions of the comparative example 1 were processed by drying at a speed | rate of 120 degreeC and 30 m / min. The results are shown in Table 1.

(◎: upper, ○: middle, △: lower)

1. The water vapor transmission rate is evaluated by the film calcium method based on KSK standard.

2. Water pressure is evaluated based on KSK standard

3. Adhesion is evaluated by bonding and peeling a polyurethane hot melt tape (PU hot-melt tape) of width 2cm

4. Drape evaluation is based on KSK standard

5. Surface feel and product quality were based on sensory evaluation.

The present invention increases the surface effect and hygroscopicity of the powder texture by chitosan, which is a hygroscopic polymer contained in the polyurethane resin film adhered to the fiber surface, so as to quickly absorb and discharge minute water vapor such as sweat in the human body for comfort. Grant.

In addition, the present invention provides a breathable waterproof fabric of a soft texture because the fine pores of chitosan powder improves the flexibility of the fabric. In addition, the present invention provides a lightweight product compared to conventional laminating products by the thinning of the surface resin layer (5 ~ 10㎛).

In addition, the present invention is also possible to manufacture a waterproof moisture-permeable fabric using the antibacterial effect of chitosan.

Claims (3)

When weaving polyester fabric woven with light and weft yarn of 75 ~ 150 denier-class twisted yarn, and water-repellent treatment and laminating, we use a film made by adding 0.2 ~ 0.5 parts of chitosan powder to 100 parts of polyurethane resin. Method of manufacturing a moisture-permeable waterproof fabric, characterized in that for laminating. The method of claim 1, wherein the film has a thickness of 5 to 10 µm. The method of claim 1, wherein the laminating film is dried at a temperature of 75-95 ° C and a speed of 15-20 m / min.