A kind of preparation method of multifunctional cool polyurethane elastic fiber
A polyurethane elastic and multi-functional technology, applied in the direction of fiber chemical characteristics, rayon manufacturing, single-component synthetic polymer rayon, etc., can solve the problems of spandex coolness retention time, single fabric function, etc., to eliminate skin toxins , Antibacterial effect is obvious, the effect of no equipment investment
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[0024] A kind of multifunctional cool polyurethane elastic fiber of the present invention and preparation method comprise the following steps:
[0025] 1) Preparation of special functional additive slurry. Jade powder, mica powder and other additives are added to the solvent, and circulated for 30-50 hours by means of a vertical grinder to obtain a uniformly dispersed functional additive slurry (concentration 30- 40wt%), filtered for subsequent use, wherein jade powder and mica powder account for 0.5% to 4% of silk weight altogether;
[0026] 2) adding diisocyanate, oligomer diol and reaction control agent into the first reactor RA1 to react to obtain -NCO-terminated prepolymer PP;
[0027] 3) The -NCO-terminated prepolymer PP and solvent obtained in step 2 are continuously transported to a high-speed dissolving machine, and under the action of shear force, the prepolymer PP is fully dissolved to obtain a prepolymer solution PPs ;
[0028] 4) The prepolymer solution PPs obta...
Embodiment 1
[0038] ① Use a vertical grinder to add 12.5kg mica powder, 12.5kg jade powder, and 2.0kg lubricating reliever to 73.357kg DMAC solvent and grind together until it passes the 1800-mesh syringe test three times, then add 5kg antioxidant, 7.5kg of ultraviolet absorber and 7.5kg of anti-yellowing agent were ground for 5 hours, then a small amount of stock solution was added and stirred for 3 hours to obtain a uniformly dispersed functional additive slurry with a concentration of 35 wt%.
[0039] ② Stir and react 267.78kg polytetrahydrofuran ether glycol (PTMEG), 62.102kg 4,4-diphenylmethane diisocyanate (MDI) and 0.321kg n-butanol (UB) at 85°C for 120min to obtain a blocked prepolymer ( PP);
[0040] ③Continuously transport the prepolymer (PP) and N,N-dimethylacetamide (DMAC) solvents to the high-speed dissolving machine at a rate of 5kg / h and 6.62kg / h respectively. Fully dissolve the prepolymer to obtain a prepolymer solution (PPs);
[0041] ④The prepolymer solution (PPs), diam...
Embodiment 2
[0045] ① Use a vertical grinder to add 25.0kg mica powder, 25.0kg jade powder, and 2.0kg lubricating and relaxing agent into 119.786kg DMAC solvent and grind together until the 1800-mesh syringe test is passed three times, then add 5kg antioxidant, 7.5kg of ultraviolet absorber and 7.5kg of anti-yellowing agent were ground for 5 hours, then a small amount of stock solution was added and stirred for 3 hours to obtain a uniformly dispersed functional additive slurry with a concentration of 35 wt%.
[0046] ② Stir and react 267.78kg polytetrahydrofuran ether glycol (PTMEG), 62.102kg 4,4-diphenylmethane diisocyanate (MDI) and 0.321kg n-butanol (UB) at 85°C for 120min to obtain a blocked prepolymer ( PP);
[0047] ③Continuously transport the prepolymer (PP) and N,N-dimethylacetamide (DMAC) solvents to the high-speed dissolver at a rate of 5kg / h and 6.819kg / h respectively. Fully dissolve the prepolymer to obtain a prepolymer solution (PPs);
[0048] ④The prepolymer solution (PPs),...
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