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

Active Publication Date: 2014-10-29
KUNSHAN HUAYANG NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (2) The pores of the surface coating formed by the existing surface coating slurry are easy to overlap, and the water pressure is relatively low, so it is difficult to break through 3500MMH2O;
[0005] (3) The toughness of the surface of the surface coating film formed by the existing top coating slurry is not enough, not scratch-resistant, and not film-resistant;
[0006] (4) The grade A rate of finished products of the existing top coat is low, and the failure rate reaches more than 30%.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

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...

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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.

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-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/02C08L75/04D06M15/564
Inventor 张子睿
Owner KUNSHAN HUAYANG NEW MATERIAL
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