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
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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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