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Method for improving moisture penetrability and water repellency of coated fabric

A technology for coating fabrics and waterproofing, which is applied in the field of improving the moisture permeability and waterproofness of coated fabrics to achieve the effect of improving moisture permeability

Inactive Publication Date: 2015-03-04
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve some problems existing in the actual production of existing fabric coatings, the present invention provides a method for improving the moisture permeability and water resistance of coated fabrics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method of improving the moisture permeability and water resistance of coated fabrics:

[0018] 1. Preparation of silk fibroin solution:

[0019] Place the silk fiber in a sodium carbonate solution with a mass concentration of 0.5%, add distilled water whose volume is 100 times that of the sodium carbonate solution, and bathe in boiling water for 30 minutes. After the above operation has been repeated twice, wash the silk fiber with distilled water to obtain pure silk fibroin. Shred after drying at 50°C. Prepare a calcium chloride:ethanol:water ternary system with a molar ratio of 1:2:8, heat and stir in a water bath at 75°C, and then add chopped pure silk fibroin in batches until it is completely dissolved to obtain brown-yellow The crude silk fibroin solution was dialyzed with deionized water, filtered and concentrated to obtain a silk fibroin solution, which was put into a refrigerator for later use.

[0020] 2. Preparation of silk fibroin solution modified coatin...

Embodiment 2

[0025] A method of improving the moisture permeability and water resistance of coated fabrics:

[0026] 1. Same as Step 1 of Example 1.

[0027] 2. The amount of silk fibroin solution prepared in step 1 is 3% of the quality of the water-based coating glue, and a mixed solution is prepared with a formaldehyde-free cross-linking agent. The amount of the formaldehyde-free cross-linking agent is 3% of the quality of the water-based coating glue. A water-based coating glue is added to the mixed solution of a good silk fibroin solution and a formaldehyde-free crosslinking agent. The amount of the water-based coating glue is 10 g, and then a polyurethane thickener is added, stirred and dispersed to obtain a modified silk fibroin solution coating glue.

[0028] 3. Same as Step 3 of Example 1.

[0029] Test results: The hydrostatic pressure of the modified coated fabric is 388mm, and the moisture permeability is 4898g.(m 2 .d) -1 , ISO whiteness 71.7%, abrasion resistance 123R, brea...

Embodiment 3

[0031] A method of improving the moisture permeability and water resistance of coated fabrics:

[0032] 1. Same as Step 1 of Example 1.

[0033] 2. The amount of silk fibroin solution prepared in step 1 is 3% of the quality of the water-based coating glue, and a mixed solution is prepared with a formaldehyde-free cross-linking agent. The amount of the formaldehyde-free cross-linking agent is 7% of the quality of the water-based coating glue. A water-based coating glue is added to the mixed solution of a good silk fibroin solution and a formaldehyde-free crosslinking agent. The amount of the water-based coating glue is 10 g, and then a polyurethane thickener is added, stirred and dispersed to obtain a modified silk fibroin solution coating glue.

[0034] 3. Same as Step 3 of Example 2.

[0035] Test results: The hydrostatic pressure of the modified coated fabric is 392mm, and the moisture permeability is 4210g.(m 2 .d) -1 , ISO whiteness 72.0%, abrasion resistance 130R, brea...

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Abstract

The invention discloses a method for improving the moisture penetrability and the water repellency of a coated fabric. The method comprises the following steps: using silk fiber as a material, dissolving silk fibroin in a calcium chloride-ethanol-water ternary system according to the molar ratio of 1:2:8 to prepare a silk fibroin solution of which the solid content is 36.2 g.L<-1>; using 10 g of a water-based coating adhesive, the silk fibroin solution which is 3 percent by mass of the water-based coating adhesive and a formaldehyde-free cross-linking agent which is 0-7 percent by mass of the water-based coating adhesive, mixing the silk fibroin solution and the formaldehyde-free cross-linking agent first, then adding the water-based coating adhesive, adding a polyurethane thickener, stirring and dispersing the mixture, coating a polyester fabric subjected to water repellent finish, and detecting the moisture penetrability, the water repellency and the physical and mechanical properties of the coated fabric. The method provided by the invention is simple and easy; the obtained modified coating adhesive greatly improves the moisture penetrability of the coated fabric while maintaining the water repellency of the coated fabric, and doesn't influence the physical and mechanical properties of the coated fabric.

Description

technical field [0001] The invention relates to the field of textile chemical industry, in particular to a method for improving the moisture permeability and water resistance of coated fabrics. Background technique [0002] Fabric coating, as the name suggests, is to coat a layer of other materials on the surface of the fabric. This also shows that fabric coating has two processing objects - base fabric, coating material, and a technology that combines the two - coating technology. Coating technology in a broad sense also includes lamination, that is, applying a layer of adhesive on the base cloth, covering it with a layer of film or other materials, heating and pressing to form a composite fabric; or the film itself is the adhesive material, Bond the base fabric with other materials. In a narrow sense, it is the process of scraping the coating material onto the surface of the fabric. The coating method of the fabric coating should be selected according to the product req...

Claims

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/15D06M15/564D06M101/32
Inventor 姜言姚双全刘秀宇高聪袁月牛芬洁
Owner GUANGXI UNIV
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