Excellent-performance polyvinyl alcohol fibers containing abrasive and method for preparing same by dry wet spinning
A vinylon and spinning technology, which is applied to the field of impregnated vinylon with excellent performance and the preparation of impregnated vinylon by dry and wet spinning, can solve the problems of low strength of impregnated vinylon, poor process stability, affecting product polishing quality, etc. Achieve the effect of improving polishing quality, reducing production cost and realizing industrialized production
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Embodiment 1
[0038] Pregnant sand vinylon, its preparation method is:
[0039] A. Preparation of spinning stock solution: Add 25 kg of polyvinyl alcohol with a degree of polymerization of 1750 ± 50 and a degree of alcoholysis of 99 mol% and 75 kg of deionized water into the dissolution tank, and stir at a temperature of 110 ± 2 °C and a pressure of 0.2 MPa, after dissolving for 6 hours; then add 20kg of 25μm brown corundum and 0.2kg of OP-10 additive to the above stock solution and stir for 2 hours; static defoaming under normal pressure for 10 hours, and the defoaming temperature is 99°C to make spinning silk stock solution;
[0040] B. Dry and wet spinning: the spinning stock solution is pressurized and transported to the single-screw extruder, and then filtered and metered, sprayed into the air from a spinneret with an aperture of 0.2mm and 200 holes to cool, and the spinning speed 15m / min, and then enter the coagulation bath (sodium sulfate solution with a concentration of 320g / L) at ...
Embodiment 2
[0043] Pregnant sand vinylon, its preparation method is:
[0044] A. Preparation of spinning stock solution: Add 20kg of polyvinyl alcohol of 2000±50, alcoholysis degree of 99.6mol% and 80kg of deionized water into the dissolution kettle, under stirring at a temperature of 115±2°C and a pressure of 0.25MPa, After dissolving for 7 hours; then add 23kg of 20μm brown corundum and 0.25kg of OP-10 additive to the above stock solution and stir for 3 hours; static defoaming under normal pressure for 12 hours, and the defoaming temperature is 99°C to make spinning stock solution ;
[0045] B. Dry and wet spinning: The spinning stock solution is conveyed to the single-screw extruder under pressure, and after filtering and metering, it is sprayed into the air from a spinneret with an aperture of 0.25mm and 160 holes to cool, and the spinning speed The temperature is 15m / min, and then entered into a coagulation bath (sodium sulfate solution with a concentration of 350g / L) at a temperatu...
Embodiment 3
[0048] Pregnant sand vinylon, its preparation method is:
[0049] A. Preparation of spinning stock solution: Add 15kg of polyvinyl alcohol with a degree of polymerization of 2200±50 and a degree of alcoholysis of 98mol% and 85kg of deionized water into the dissolution tank, and stir at a temperature of 115±2°C and a pressure of 0.25 MPa, after dissolving for 7 hours; then add 28kg of 15μm brown corundum and 0.15kg of OP-20 additive to the above stock solution and stir for 2.5 hours; static defoaming under normal pressure for 15 hours, the defoaming temperature is 99°C, and the spinning silk stock solution;
[0050] B. Dry and wet spinning: The spinning stock solution is transported to the single-screw extruder under pressure, and after filtering and metering, it is sprayed into the air from a spinneret with an aperture of 0.3mm and 240 holes to cool, and the spinning speed 20m / min, and then enter the coagulation bath (sodium sulfate solution with a concentration of 380g / L) at...
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