Surface coating slurry for moisture-permeable waterproof fabric and its preparation process

A preparation process, moisture-permeable and waterproof technology, applied in the field of textile fabrics, can solve the problems of difficulty in breaking through 3500MMH2O, insufficient surface toughness of the topcoat film, low A-grade rate of the topcoat, etc., so as to improve the moisture permeability and permeability. Appropriate, good fastness effect

CN103214682BActive Publication Date: 2014-10-29KUNSHAN HUAYANG NEW MATERIAL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2014-10-29
Patent Text Reader

Abstract

The invention discloses a surface coating slurry used for moisture permeable waterproof fabrics and a preparation technology, the surface coating slurry comprises polyurethane resin, butanone, toluene, water and N-methyl ethanolamine; the preparation technology comprises the following steps: uniformly mixing butanone, water and polyurethane resin to form a main resin solution according to mass proportion of 66-68:3-5:29; placing a mixed liquid of butanone and toluene in the main resin solution to form a main resin mixed solution; mixing N-methyl ethanolamine and main resin mixed solution to form adjusted main resin mixed solution; uniformly mixing water and butanone according to mass proportion of 9:1 to form a solvent; mixing the solvent and the adjusted main resin mixed solution; passing the main resin mixed solution adjusted by the step 5 through a nylon net with 100-200 meshes for filtering to obtain the filtered main resin mixed solution; and standing the filtered main resin mixed solution for at least 2 hours for deaeration treatment. The coating fabrics formed by the surface coating slurry has uniform micropore, and is difficult to be expanded when contacting water.
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Description

technical field

[0001] The invention relates to a surface coating slurry for moisture-permeable waterproof fabrics and a preparation process thereof, belonging to the technical field of textile fabrics. Background technique

[0002] The hydrophilic non-porous PU moisture-permeable raw material currently used in the market, this method is to apply the hydrophilic non-porous PU moisture-permeable raw material to the surface of the base fabric through a coating machine, and then pass it through the coating machine oven. Hot air drying, solvent volatilization, and film formation. Make the fabric waterproof and moisture-permeable. The moisture-permeable principle is that the moisture-permeable raw materials contain hydrophilic substances, which have the functions of moisture absorption-diffusion-desorption. The moisture-permeable fabric processed by this process will swell when it encounters water, resulting in a decrease in the abrasion resistance of the film, and the moisture-...

Examples

Embodiment 1-3

[0030] Embodiment 1-3: A preparation process for surface coating slurry for moisture-permeable waterproof coating fabrics, including:

[0031] Step 1. Mix butanone, water and polyurethane resin according to the mass ratio of 66~68:3~5:29~31 to form the main resin solution. Note: the mixing ratio of Example 1 is 66:3:31, and the mixing ratio of Example 2 The mixing ratio is 67:5:29, and the mixing ratio of Example 3 is 68:4:30;

[0032] Step 2. Slowly drop the mixed solution of methyl ethyl ketone and toluene into the main resin solution of step 1 and uniformly stir to form a main resin mixed solution. The mass ratio of the mixed solution to the main resin solution is 100:43-45. Ketone and toluene form the mixed solution according to the mass ratio of 1:2 or 1:1;

[0033] Step 3. Stir and mix N-methylethanolamine and the main resin mixed solution in step 2 according to the mass ratio of 100:1.5 or 2 or 2.5 at a temperature of 25 to 35° C. at a speed of 1000 rpm to form an adju...