Preparation method of high-strength and high-modulus polyvinyl alcohol fine fiber
A technology of polyvinyl alcohol and fine denier fibers, which is applied in the fields of fiber chemical characteristics, spinning solution preparation, wet spinning, etc., to achieve the effects of improving production stability, increasing hydrogen bond force, and increasing breaking strength
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Embodiment 1
[0036] The preparation method of high strength, high modulus polyvinyl alcohol fine denier fiber in the present embodiment is as follows:
[0037] 1. Preparation of spinning stock solution
[0038] Mix 12 parts by mass of polyvinyl alcohol resin with a degree of polymerization of 1700 and a degree of alcoholysis ≥99% and 88 parts by mass of deionized water, dissolve at 101°C for 5 hours to obtain a polyvinyl alcohol solution, and then add 1 wt% of boric acid and 0.01 wt% of carbolic acid wt% and 0.3wt% of polyether defoamer, adjust the pH value to 4.2 with acetic acid, then filter through a metal filter with a filtration accuracy of 10 μm and leave it for defoaming for 5 hours to obtain the spinning stock solution;
[0039] 2. Solidification molding
[0040] After the spinning stock solution is metered by a metering pump, the spinneret with an aperture of 0.065mm is used for spinning, and the filaments are solidified and formed in a coagulation bath; 340 g / L of sodium sulfate...
Embodiment 2
[0049] The preparation method of high strength, high modulus polyvinyl alcohol fine denier fiber in the present embodiment is as follows:
[0050] 1. Preparation of spinning stock solution
[0051] Mix 17 parts by mass of polyvinyl alcohol resin with a degree of polymerization of 2000 and a degree of alcoholysis ≥99% and 83 parts by mass of deionized water, dissolve at 115°C for 6 hours to obtain a polyvinyl alcohol solution, and then add 2 wt% of boric acid and 0.02 wt% of carbolic acid wt% and 0.4wt% of polyether defoamer, adjust the pH value to 4.5 with acetic acid, then filter through a metal filter with a filtration accuracy of 10 μm and leave it for defoaming for 6 hours to obtain the spinning stock solution;
[0052] 2. Solidification molding
[0053] After the spinning stock solution is metered by a metering pump, the spinneret with an aperture of 0.09mm is used for spinning, and the filaments are solidified and formed in a coagulation bath; 380 g / L of sodium sulfate ...
Embodiment 3
[0062] The preparation method of high strength, high modulus polyvinyl alcohol fine denier fiber in the present embodiment is as follows:
[0063] 1. Preparation of spinning stock solution
[0064] Mix 15 parts by mass of polyvinyl alcohol resin with a degree of polymerization of 1785 and a degree of alcoholysis ≥99% with 85 parts by mass of deionized water, dissolve at 105°C for 5.5 hours to obtain a polyvinyl alcohol solution, and then add 1.2 wt% boric acid and carbolic acid 0.01wt% and polyether defoamer 0.33wt%, adjust the pH value to 4.5 with sulfuric acid, then filter through a metal filter with a filtration accuracy of 10 μm, and then stand for defoaming for 6.5 hours to obtain the spinning stock solution;
[0065] 2. Solidification molding
[0066] The spinning stock solution is metered by a metering pump and then spun through a spinneret with an aperture of 0.07 mm, and the filaments are solidified and formed in a coagulation bath; 350 g / L of sodium sulfate and 11 g...
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