Preparation method of modified PU (polyurethane) processing liquid for felt proofing of wool

A water-based polyurethane, polyurethane technology, applied in the direction of anti-shrinkage fiber, fiber treatment, improved hand fiber, etc., can solve the problems of hard hand feeling, high polyurethane concentration and roughness of wool fabrics, and achieve good anti-felt shrinkage effect and smooth hand feel. Effect

Inactive Publication Date: 2018-11-06
JIANGSU SUNSHINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wool fabric treated with water-based polyurethane feels hard and rough, and the concentration of polyurethane in the water-based polyurethane treatment solution is also relatively large.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1 The preparation method of wool anti-felting treatment liquid with modified polyurethane comprises the following steps:

[0019] S1, configure water-based polyurethane solution;

[0020] S2, dissolving chitosan in an acid solution, fully stirring to obtain a chitosan solution;

[0021] S3, adding the chitosan solution into the aqueous polyurethane solution, heating and placing it under ultrasonic conditions to react for 3 hours, and adjusting the pH to 7 with saturated sodium bicarbonate solution to obtain a finished product of the modified polyurethane solution.

[0022] The concentration of the water-based polyurethane in the water-based polyurethane solution is 5g / L, and the molecular weight of the water-based polyurethane is 55000-60000.

[0023] The concentration of chitosan in the chitosan solution is 0.2 g / L, and the molecular weight of chitosan is 35000-50000.

[0024] The heating temperature in S3 is 30°C.

[0025] The acid solution in S2 is an a...

Embodiment 2

[0027] Embodiment 2 is based on embodiment 1, and difference is, ultrasonic condition reaction 5h in S3, adjust pH to 8 with saturated sodium bicarbonate solution; The concentration of water-based polyurethane in the water-based polyurethane solution is 2.5g / L, and the molecular mass of water-based polyurethane is 20,000-30,000; the concentration of chitosan in the chitosan solution is 0.5 g / L, and the molecular weight of chitosan is 10,000-20,000; the heating temperature in S3 is 55°C; the acid solution in S2 is a hydrochloric acid solution with equal pH.

Embodiment 3

[0029] Embodiment 3 is based on embodiment 1, and the difference is that, in S3, the ultrasonic condition is reacted for 10h, and the pH is adjusted to 7 with saturated sodium bicarbonate solution; the concentration of water-based polyurethane in the water-based polyurethane solution is 4g / L, and the molecular weight of water-based polyurethane is 20000 ~50000; the concentration of chitosan in the chitosan solution is 0.5g / L, and the molecular weight of chitosan is 10000-30000; the heating temperature in S3 is 55°C; the acid solution in S2 is equal to the pH value in S2 of citric acid solution.

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Abstract

The invention discloses a preparation method of a modified PU (polyurethane) processing liquid for felt proofing of wool. The preparation method is characterized by comprising steps as follows: S1, awaterborne PU solution is prepared; S2, chitosan is dissolved in an acid solution and sufficiently stirred, and a chitosan solution is prepared; S3, the chitosan solution is added to the waterborne PUsolution, heated and subjected to a reaction for 5-10 h under the ultrasonic condition, pH is regulated to 7-8 by a saturated sodium hydrogen carbonate solution, and a finished modified PU solution product is prepared. The chitosan is introduced into an existing waterborne PU processing liquid, a uniform film is formed on the textile surface by the chitosan and a waterborne PU polymerization system, obtained wool fabric and wool yarn touch smooth, the felt proofing effect is good, and color of the wool fabric and the wool yarn before and after processing is not changed obviously.

Description

technical field [0001] The invention belongs to the technical field of wool fabric finishing compositions, and in particular relates to a preparation method of a modified polyurethane treatment liquid for wool anti-felting. Background technique [0002] Wool fiber aggregates or woolen fabrics are repeatedly squeezed and rubbed in soaping solution, acidic solution or other similar aqueous solutions, the fibers are entangled and felt together, the gaps between the fibers become smaller, and gradually become tighter, and cannot be restored to the original state of dispersion. One characteristic is called felt shrinkage. In actual production, it is necessary to perform anti-felting finishing on wool fabrics. Commonly used anti-felting finishing methods include chemical degradation, polymer deposition and enzyme treatment. Chemical degradation and enzymatic treatment usually become mercerizing treatment. Domestically, wool needs to be treated with BasolanDC chlorination or prot...

Claims

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Application Information

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IPC IPC(8): D06M15/564D06M15/03D06M101/12
CPCD06M15/03D06M15/564D06M2101/12D06M2200/45D06M2200/50
Inventor 许勇丁巧英陶海燕
Owner JIANGSU SUNSHINE
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