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

Inactive Publication Date: 2017-02-15
JIANGSU HAIYANG CHEM FIBERS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although lowering the spinning temperature can achieve the purpose of promoting the cooling of the extruded molten polymer, it is prone to rapid cooling and solidification of the filaments at the same time, and the polymer orientation cannot be smoothly carried out, resulting in difficulties in drafting and broken ends in subsequent processes. Phenomenon that reduces polymer spinnability and production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[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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Abstract

The invention provides a high-spinnability nylon composition and a method for preparing nylon fibers. The nylon composition comprises 95 to 100 parts of nylon, 0.01 to 0.1 part of copper compound and 0.1 to 0.5 part of 2-mercaptobenzimidazole. During spinning by using the composition provided by the invention, the spinning temperature can reach 270 to 290DEG C, the spinning temperature is higher, thereby the problems that filament bundles are sharply cooled and solidified and high-molecular orientation cannot be smoothly performed during preparation of fibers with greater filament number are avoided, the drawing speed during spinning can reach 500 to 650m/min, thereby the spinning efficiency and the strength of the obtained nylon fibers are improved, the filament number of the nylon fibers obtained by the invention is 20 to 40d, the strength is 7.5 to 8.0g/d, the elongation is 20 to 25 percent and the performance is excellent.

Description

technical field [0001] The invention relates to the technical field of spinning, in particular to a high-spinnability nylon composition and a method for preparing nylon fibers. Background technique [0002] Nylon fiber, also known as polyamide fiber, is the earliest synthetic fiber developed and industrialized in the world. It has the characteristics of high strength, good wear resistance, good elastic recovery rate, and excellent hygroscopicity. It is widely used in automotive textiles, Filtration materials and special military textiles and other fields. [0003] The common method of producing nylon fiber is melt spinning method. When producing fibers with thick single filaments, the molten polymer extruded from the component hole cools very slowly. In order to improve the stability of spinning and drawing, it is necessary to reduce the Spinning temperature, while reducing the drawing speed. However, although lowering the spinning temperature can achieve the purpose of pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/00C08L77/02C08L77/06C08K3/16C08K5/37D01F6/90D01F1/10D01D5/08
CPCC08K3/16C08K5/378C08L2201/08C08L2203/12D01D5/08D01F1/10D01F6/90C08L77/02C08L77/06
Inventor 西尾俊幸严治泉
Owner JIANGSU HAIYANG CHEM FIBERS
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