Preparation method and application method of after-finishing solution for fabrics

A technology for finishing and fabrics, applied in the field of fabric finishing liquid preparation, can solve the problems of free formaldehyde and the decrease of fabric strength, and achieve the effect of improved wrinkle recovery performance and low strength loss

Inactive Publication Date: 2020-01-14
JIANGNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional anti-wrinkle finishing of cotton fabrics mostly uses N-hydroxyl finishing agents, but the finished textiles will produce free formaldehyde during the wearing process, and the strength of the finished fabrics will decrease.

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

[0019] The preparation method of the fabric finishing solution comprises step a, adding 18 g of polypropylene glycol and 3 drops of catalyst dibutyltin dilaurate into a four-necked flask equipped with a magnet, a thermometer, a reflux condenser and a constant pressure dropping funnel, and heating to 80°C, after mixing well, slowly add 8g of isophorone diisocyanate dropwise under the protection of nitrogen, after 1.5h of reaction, add 1.98g of hydrophilic chain extender N-methyldiethanolamine dropwise, and react for 3h to generate polyurethane prepolymer The prepared polyurethane prepolymer was cooled to 40°C, then added 1.08g of neutralizing agent acetic acid, and reacted for 30min; added 3.9g of silane coupling agent γ-aminopropyltriethoxysilane, and heated to 45°C, React for 40 minutes; finally add 90 ml of deionized water and emulsify at high speed for 30 minutes to obtain cationic silicone-modified waterborne polyurethane.

[0020] b. Compounding cationic organosilicon-mod...

Embodiment 2

[0024] The preparation method of the fabric finishing solution comprises step a, adding 20 g of polypropylene glycol and 3 drops of catalyst dibutyltin dilaurate into a four-necked flask equipped with a magnet, a thermometer, a reflux condenser and a constant pressure dropping funnel, and heating to 80°C, after mixing well, slowly add 8g of isophorone diisocyanate dropwise under the protection of nitrogen, after 1.5h of reaction, add 1.68g of hydrophilic chain extender N-methyldiethanolamine dropwise, and react for 3h to generate polyurethane prepolymer Cool the prepared polyurethane prepolymer to 40°C, then add 0.88g of neutralizing agent acetic acid, react for 30min, add 4.9g of silane coupling agent γ-aminopropyltriethoxysilane, heat up to 45°C, React for 40 minutes; finally add 90 ml of deionized water and emulsify at high speed for 30 minutes to obtain cationic silicone-modified waterborne polyurethane.

[0025] b. Compound cationic organosilicon-modified water-based poly...

Embodiment 3

[0029] The preparation method of the fabric finishing solution comprises step a, adding 15 g of polypropylene glycol and 3 drops of catalyst dibutyltin dilaurate into a four-necked flask equipped with a magnet, a thermometer, a reflux condenser and a constant pressure dropping funnel, and heating to 80°C, after mixing well, slowly add 9g of isophorone diisocyanate dropwise under the protection of nitrogen, after 1.5h of reaction, add 2.28g of hydrophilic chain extender N-methyldiethanolamine dropwise, and react for 3h to generate polyurethane prepolymer Cool the prepared polyurethane prepolymer to 40°C, then add 1.58g of neutralizing agent acetic acid, react for 30min, add 4.2g of silane coupling agent γ-aminopropyltriethoxysilane, heat up to 45°C, React for 40 minutes; finally add 90 ml of deionized water and emulsify at high speed for 30 minutes to obtain cationic silicone-modified waterborne polyurethane.

[0030] b. Compound cationic organosilicon-modified water-based poly...

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PUM

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Abstract

The invention relates to a preparation method and an application method of an after-finishing solution for fabrics. The preparation method includes: in protection of nitrogen, adding polyhydric alcohols, catalysts, diisocyanate and chain extenders into a four-neck flask to react to generate polyurethane prepolymer, adding a neutralizer for neutralizing, adding organic silicon for modification, andfinally adding deionized water for emulsification, so as to obtain cationic organic silicon modified waterborne polyurethane; compounding the cationic organic silicon modified waterborne polyurethanewith an anti-crease finishing agent to obtain the after-finishing solution for fabrics. The application method includes soaking the fabrics in the after-finishing solution for fabrics, subjecting thefabrics to the process of dip dyeing twice and rolling twice, and then drying and baking the fabrics sequentially. Since the cationic organic silicon modified waterborne polyurethane and the anti-crease finishing agent are compounded, cotton fiber internal cross-linking and deposition on surface or in gap of fabric weave are achieved simultaneously, and under the synergistic reaction of the internal cross-linking and the film forming by surface deposition, the crease recovery of the fabrics is improved while strength loss is kept at a low level.

Description

Technical field: [0001] The invention belongs to the technical field of fabric finishing, and in particular relates to a method for preparing and using a fabric finishing solution. Background technique: [0002] The anti-wrinkle finishing of cotton fabric is an important process to improve the fabric's wearing function and increase its added value. The traditional anti-wrinkle finishing of cotton fabrics mostly uses N-hydroxyl finishing agents, but the finished textiles will produce free formaldehyde during the wearing process, and the strength of the finished fabrics will decrease. Invention content: [0003] The first technical problem to be solved by the present invention is to provide a preparation method of a fabric finishing solution that can make the cotton fabric after finishing have the dual effects of low strength loss and anti-wrinkle and no free formaldehyde. [0004] In order to solve the problems of the technologies described above, the technical solution ad...

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): D06M15/568C08G18/75C08G18/66C08G18/48C08G18/32C08G18/28D06M101/06
CPCC08G18/289C08G18/4825C08G18/6688C08G18/755D06M15/568D06M2101/06D06M2200/20
Inventor 高卫东王雪纯罗雄方傅佳佳张建祥耿彩花刘德铭张凯
Owner JIANGNAN UNIV
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