Preparation method of high performance polyacrylonitrile fiber
A technology of polyacrylonitrile fiber and polyacrylonitrile, which is applied in the direction of fiber chemical characteristics, single-component synthetic polymer rayon, textiles and papermaking, etc., which can solve the problems of low fiber breaking strength and easy generation of fuzz, etc., and achieve reduction Static electricity, reduce the generation of fuzz, avoid the effect of increasing
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Embodiment 1
[0026] 1. Coagulation and drafting: Wet spinning is used for the preparation of primary fibers. The intrinsic viscosity of the stock solution used is 1.75, and the solid content of the spinning stock solution is 22%. Spinning is carried out, and the number of spinneret holes is 12,000 to obtain coagulated fibers, followed by two-stage coagulation and drawing, and the draft ratios are 1.0 and 1.05, respectively, to obtain coagulated fibers.
[0027] 2. Washing: 1-3 washes at 55°C, 4-6 washes at 60°C, 7-9 washes at 75°C, and keep the fiber tension constant during the washing process.
[0028] 3. Hot water drawing: the temperature of the three hot water drawing is 90, 98, 99 ℃ respectively, and the drawing ratio is 1.8, 2.0, 2.4 respectively.
[0029] 4. Oiling: the oiling temperature is 35°C, without drawing.
[0030] 5. Drying and densification: Dry and densify the fibers obtained in step 4. The drying and densification temperature is in a stepwise temperature rise mode. The d...
Embodiment 2
[0035] 1. Coagulation and drafting: Wet spinning is used for the preparation of primary fibers. The intrinsic viscosity of the stock solution used is 1.75, and the solid content of the spinning stock solution is 22%. Spinning is carried out, and the number of spinneret holes is 12,000 to obtain coagulated fibers, followed by two-stage coagulation and drawing, and the draft ratios are 1.0 and 1.05, respectively, to obtain coagulated fibers.
[0036] 2. Washing: 1-3 washes at 55°C, 4-6 washes at 60°C, 7-9 washes at 75°C, and keep the fiber tension constant during the washing process.
[0037] 3. Hot water drawing: the temperature of the three hot water drawing is 90, 98, 99 ℃ respectively, and the drawing ratio is 1.8, 2.0, 2.4 respectively.
[0038] 4. Oiling: the oiling temperature is 35°C, without drawing.
[0039] 5. Drying and densification: Dry and densify the fibers obtained in step 4. The drying and densification temperature is in a stepwise temperature rise mode. The d...
Embodiment 3
[0044]1. Coagulation and drafting: Wet spinning is used for the preparation of primary fibers. The intrinsic viscosity of the stock solution used is 1.75, and the solid content of the spinning stock solution is 22%. Spinning is carried out, and the number of spinneret holes is 12,000 to obtain coagulated fibers, followed by two-stage coagulation and drawing, and the draft ratios are 1.0 and 1.05, respectively, to obtain coagulated fibers.
[0045] 2. Washing: 1-3 washes at 55°C, 4-6 washes at 60°C, 7-9 washes at 75°C, and keep the fiber tension constant during the washing process.
[0046] 3. Hot water drawing: the temperature of the three hot water drawing is 90, 98, 99 ℃ respectively, and the drawing ratio is 1.8, 2.0, 2.4 respectively.
[0047] 4. Oiling: the oiling temperature is 35°C, without drawing.
[0048] 5. Drying and densification: Dry and densify the fibers obtained in step 4. The drying and densification temperature is in a stepwise temperature rise mode. The dr...
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