Preparation method of anti-ultraviolet microcavity hollow fibers
A UV-type, hollow technology, used in the manufacture of hollow filaments, conjugated synthetic polymer man-made filaments, etc., to achieve the effect of good moisture absorption and quick drying
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Embodiment 1
[0020] A method for preparing an anti-ultraviolet microcavity hollow fiber, comprising the following steps:
[0021] S1: Blending, pumping 10% by weight of dimethyl terephthalate, 1% of easily alkali-degradable polyester and 5% of anti-ultraviolet polyester into a vacuum drum and mixing uniformly, the mixing time is 0.5 h, the temperature is 60°C;
[0022] S2: Spinning, adding functionally modified masterbatches before spinning, and melt blending and spinning through a hollow spinneret to obtain crude anti-ultraviolet microcavity hollow fibers;
[0023] S3: Cooling, cooling the crude anti-ultraviolet microcavity hollow fiber in a coagulation bath of alcohol water;
[0024] S4: Purification, wrap the cooled crude anti-ultraviolet microcavity hollow fiber with filter paper, use distilled water as the extraction agent, boil and reflux for 24 hours to completely remove the residual porogen and solvent, take it out, and dry it in an oven To constant weight, the pure finished anti...
Embodiment 2
[0027] A method for preparing an anti-ultraviolet microcavity hollow fiber, comprising the following steps:
[0028] S1: Blending, pumping 20% by weight of dimethyl terephthalate, 5% of easily alkali-degradable polyester and 8% of anti-ultraviolet polyester into a vacuum drum and mixing uniformly, the mixing time is 1h , the temperature is 70°C;
[0029] S2: Spinning, adding functionally modified masterbatches before spinning, and melt blending and spinning through a hollow spinneret to obtain crude anti-ultraviolet microcavity hollow fibers;
[0030] S3: Cooling, cooling the crude anti-ultraviolet microcavity hollow fiber in a coagulation bath of alcohol water;
[0031] S4: Purification, wrap the cooled crude anti-ultraviolet microcavity hollow fiber with filter paper, use distilled water as the extraction agent, boil and reflux for 24 hours to completely remove the residual porogen and solvent, take it out, and dry it in an oven To constant weight, the pure finished anti...
Embodiment 3
[0034] A method for preparing an anti-ultraviolet microcavity hollow fiber, comprising the following steps:
[0035] S1: Blending, 30% by weight of dimethyl terephthalate, 10% of alkali-degradable polyester and 15% of anti-ultraviolet polyester are pumped into a vacuum drum and mixed evenly, and the mixing time is 1.5 h, the temperature is 70°C;
[0036] S2: Spinning, adding functionally modified masterbatches before spinning, and melt blending and spinning through a hollow spinneret to obtain crude anti-ultraviolet microcavity hollow fibers;
[0037] S3: Cooling, cooling the crude anti-ultraviolet microcavity hollow fiber in a coagulation bath of alcohol water;
[0038] S4: Purification, wrap the cooled crude anti-ultraviolet microcavity hollow fiber with filter paper, use distilled water as the extraction agent, boil and reflux for 24 hours to completely remove the residual porogen and solvent, take it out, and dry it in an oven To constant weight, the pure finished anti-u...
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