Preparation method of polyacrylonitrile fiber
A polyacrylonitrile fiber and polyacrylonitrile spinning technology, which is applied to the chemical characteristics of fibers, complete sets of equipment for the production of artificial threads, textiles and papermaking, etc. It can solve the problems of poor oiling uniformity and excessive wool
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Embodiment 1
[0026] 1. Coagulation and drafting: Wet spinning is used to prepare primary fibers. The intrinsic viscosity of the original solution used is 1.75, and the solid content of the spinning original solution is 22%. The spinning original solution is accurately measured by a metering pump and filtered again. The diameter of the silk plate is 60 μm, the number of spinneret holes is 12,000, the coagulation temperature is 25°C, and the concentration is 50%, followed by two-stage coagulation drafting, and the drafting ratios are 1.0 and 1.05, respectively, to obtain coagulated fibers.
[0027] 2. Washing: 1-3 washes at a temperature of 55°C, 4-6 washes at a temperature of 60°C, and 7-9 washes at a temperature of 75°C, the washing process keeps the fiber tension constant.
[0028] 3. Hot water drafting: The three hot water drafting temperatures are 90, 98, and 99°C, respectively, and the drafting ratios are 1.8, 2.0, and 2.4.
[0029] 4. Oiling: The oiling temperature is 35℃, no drawing ...
Embodiment 2
[0035] 1. Coagulation and drafting: Wet spinning is used to prepare primary fibers. The intrinsic viscosity of the original solution used is 1.75, and the solid content of the spinning original solution is 22%. The spinning original solution is accurately measured by a metering pump and filtered again. The diameter of the silk plate is 60 μm, the number of spinneret holes is 12,000, the coagulation temperature is 25°C, and the concentration is 50%, followed by two-stage coagulation drafting, and the drafting ratios are 1.0 and 1.05, respectively, to obtain coagulated fibers.
[0036] 2. Washing: 1-3 washes at a temperature of 55°C, 4-6 washes at a temperature of 60°C, and 7-9 washes at a temperature of 75°C, the washing process keeps the fiber tension constant.
[0037] 3. Hot water drafting: The three hot water drafting temperatures are 90, 98, and 99°C, respectively, and the drafting ratios are 1.8, 2.0, and 2.4.
[0038] 4. Oiling: The oiling temperature is 35°C, no drawing...
Embodiment 3
[0044]1. Coagulation and drafting: Wet spinning is used to prepare primary fibers. The intrinsic viscosity of the original solution used is 1.75, and the solid content of the spinning original solution is 22%. The spinning original solution is accurately measured by a metering pump and filtered again. The diameter of the silk plate is 60 μm, the number of spinneret holes is 12,000, the coagulation temperature is 25°C, and the concentration is 50%, followed by two-stage coagulation drafting, and the drafting ratios are 1.0 and 1.05, respectively, to obtain coagulated fibers.
[0045] 2. Washing: 1-3 washes at a temperature of 55°C, 4-6 washes at a temperature of 60°C, and 7-9 washes at a temperature of 75°C, the washing process keeps the fiber tension constant.
[0046] 3. Hot water drafting: The three hot water drafting temperatures are 90, 98, and 99°C, respectively, and the drafting ratios are 1.8, 2.0, and 2.4.
[0047] 4. Oiling: The oiling temperature is 35°C, no drawing ...
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