Preparation method of color-changing fibers

A technology of color-changing fibers and color-changing powders, which is applied in the spinning solution by adding dyes, conjugated synthetic polymer rayon filaments, etc. High speed, high mechanical strength, and the effect of solving weather resistance

Inactive Publication Date: 2019-12-03
SHANGHAI DIFANG TEXTILE TECHCAL FLOCKING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the disadvantages of existing photochromic fibers such as poor color-changing function, poor weather resistance, low mechanical strength, and incapability of large-scale production, the invention provides a preparation method of color-changing fibers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) polyethylene with a viscosity-average molecular weight of 7000, according to the mass ratio, add 3% photochromic dye, 3% ultraviolet absorber, 0.2% antioxidant, 15% sensitizer, mix evenly and melt and granulate at 150°C to prepare The polyethylene photochromic masterbatch is obtained, and the masterbatch is crushed and sieved at low temperature to obtain a color-changing powder.

[0032] 2) In terms of parts by mass, 100 parts of polyethylene terephthalate are added to 20 parts of the above-mentioned color-changing powder for blending. The form of "drop" is evenly distributed in the fiber-forming polymer to obtain the color-changing fiber core material, which is dried to a moisture content of less than 100ppm; the polyethylene terephthalate with a moisture content of less than 100ppm is mixed with 0.1% to improve air tightness Agent, 0.1% spinning aid, 0.01% softening agent are mixed as the skin layer, the mass ratio of the core layer material to the skin layer mater...

Embodiment 2

[0034] 1) Polypropylene with a viscosity-average molecular weight of 10000, according to the mass ratio, add 45% photochromic dye, 15% ultraviolet absorber, 0.3% antioxidant, 15% sensitizer, mix uniformly and melt and granulate at 150°C to prepare The polypropylene photochromic masterbatch is obtained, and the masterbatch is crushed and sieved at low temperature to obtain a color-changing powder.

[0035] 2) In terms of parts by mass, add 100 parts of polyhexamethylene adipamide to 50 parts of the above-mentioned color-changing powder for blending, and under the action of twin-screw shearing, the color-changing powder will form "solid milk droplets" with a particle size of 5 μm uniformly distributed in the fiber-forming polymer to obtain the color-changing fiber core material, and dried until the moisture content is less than 100ppm; the polybutylene terephthalate with a moisture content of less than 100ppm and 1% air-tightness enhancer , 0.2% spinning aid, and 0.1% softening ...

Embodiment 3

[0037] 1) Poly-1-butene with a viscosity-average molecular weight of 15000, add 45% photochromic dye, 15% ultraviolet absorber, 0.3% antioxidant, 5% sensitizer according to the mass ratio, mix uniformly and melt at 180°C to make granules to obtain poly-1-butene photochromic masterbatch, which is crushed at low temperature and sieved to obtain a color-changing powder.

[0038] 2) In parts by mass, 100 parts of poly-1-butene are added to 50 parts of the above-mentioned color-changing powder for blending. Under the action of twin-screw shearing, the color-changing powder is in the form of "solid milk droplets" with a particle size of 1 μm Evenly distributed in the fiber-forming polymer to obtain the color-changing fiber core material, and dried until the water content is less than 100ppm; the polyethylene with a water content of less than 100ppm is mixed with 0.5% air tightness enhancer, 0.3% spinning aid, 0.05% The softening agent is mixed as the skin layer, the mass ratio of th...

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Abstract

The invention provides a preparation method of color-changing fibers. The preparation method comprises the steps of preparation of color-changing powder and preparation of color-changing fibers applying the powder; the color-changing powder is prepared from polyolefin, photochromic dyes, an antioxidant, an ultraviolet absorber and a sensitizer, all the materials are uniformly mixed and granulatedthrough melting, then pulverized at low temperature and sieved to obtain the color-changing powder with a desired particle size, the powder is blended with a fiber-forming polymer, the color-changingpowder is further sheared and dispersed under the shearing function of a twin screw rod and uniformly distributed in the fiber-forming polymer in the form of solid emulsion droplets to form a core layer material of the color-changing fibers, and the core layer is wrapped with a fiber-forming polymer skin layer containing a functional auxiliary agent to obtain the photochromic fibers of a skin-corestructure. The color-changing fibers prepared by means of the method are suitable for various photochromic dyes, high in applicability and operability and simple in preparation method and have a goodcolor development effect, long service life, excellent mechanical properties and broad application prospects in the field of textiles and garments.

Description

technical field [0001] The invention relates to the technical field of textiles, in particular to a method for preparing color-changing fibers Background technique [0002] With the rapid development of science and technology, functional fibers have received more and more attention due to their wide range of applications. In the textile industry, the application of functional fibers is conducive to improving the technological content of textiles and meeting the special needs of special fields. enhance its competitiveness in the industry. [0003] Among many functional fibers, photochromic fibers are widely used in security and anti-counterfeiting, clothing fabrics, military camouflage and other fields due to their unique properties. There are two main aspects to the color change principle of photochromic fiber. One is that the fiber is spun with liquid crystal, and the inside contains liquid crystal structure, which has different reflection effects on incident light and for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14D01F8/12D01F8/06D01F1/06
CPCD01F1/06D01F8/06D01F8/12D01F8/14
Inventor 钟博文
Owner SHANGHAI DIFANG TEXTILE TECHCAL FLOCKING
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