High-spinnability nylon composition and method for preparing nylon fiber
A nylon fiber, high spinnability technology, applied in the field of spinning, can solve the problems of reducing the spinnability and production efficiency of polymers, unable to orientate the polymer smoothly, and difficult to draw in the process, achieving good spinnability, Easy to scale production and high production efficiency
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[0034] The method for preparing nylon fibers provided by the invention has high spinning temperature, fast spinning and drafting speed, high drafting ratio, and improves the production efficiency of the spinning process.
[0035] The invention provides a nylon fiber prepared by the method. In the present invention, the monofilament fineness of the nylon fiber is preferably 20-40d, more preferably 25-35d; the strength of the nylon fiber is preferably 7.5-8.0g / d, more preferably 7.7-7.9g / d ; The elongation of the nylon fiber is preferably 20-25%, more preferably 22-23%.
Embodiment 1
[0038] 100 parts by weight of nylon 6 chips with a relative viscosity of 3.40, together with 0.03 parts by weight of copper iodide and 0.3 parts by weight of 2-mercaptobenzimidazole, are extruded through the screw, and the set temperature of the screw is: 265 ° C, 280 ° C, 270 ° C , 275 ° C, 275 ° C, after filtering with a metal non-woven fabric with an average pore size of 20 μm, use a component with a pore size of 0.65 mm and a hole number of 14 for spinning, and then the side blowing height is 2.1 meters, and the side blowing temperature is 17 ° C, humidity Cool under 90% environment, stretch 4.5 times under the conditions of drawing speed of 500m / min and temperature of 195°C, and take up at a winding speed of 2014m / min to obtain a nylon fiber with a monofilament fineness of 30d.
[0039] Record the number of times of drawing broken ends in the spinning process; according to GB / T14344-2008 (chemical fiber, filament tensile property test method), the strength and elongation o...
Embodiment 2
[0041]100 parts by weight of nylon 6 chips with a relative viscosity of 3.40, together with 0.05 parts by weight of copper iodide and 0.2 parts by weight of 2-mercaptobenzimidazole, are extruded through the screw, and the set temperature of the screw is: 265 ° C, 280 ° C, 270 ° C , 275°C, 275°C, use a metal non-woven fabric with an average pore size of 20 μm to filter the melt, and then use a component with a pore size of 0.65 mm and a hole number of 14 for spinning. Cooling in an environment with a humidity of 90%, stretching by a factor of 4.45 at a pulling speed of 550m / min. and a temperature of 195°C, and coiling at a winding speed of 2178m / min to obtain nylon with a single fiber fineness of 30d fiber.
[0042] Record the number of times of drawing broken ends during the spinning process; detect the strength and elongation of the obtained nylon fibers according to the method in the examples, and list them in Table 1.
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