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High-elongation special-shaped polyamide fiber 66 and production method thereof

A production method and technology of nylon, applied in the direction of stretch spinning, fiber processing, filament/thread forming, etc., can solve the problems of dependence on imports, complex production technology, etc., to improve quality, process stability, and improve spinnability. Effect

Active Publication Date: 2017-06-09
SHEN MA INDUSTRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, since the nylon 66 high-elongation special-shaped fiber adopts the melt direct spinning technology, which has the characteristics of complex production technology, high technical requirements for production equipment and high production management and operation requirements, domestic enterprises have not independently developed the production of high-quality nylon 66. The technology of elongating special-shaped fibers, the domestic use of nylon 66 high-elongation special-shaped still relies on imports

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A production method of high-elongation special-shaped nylon 66 fiber, comprising the following steps:

[0033] (1) Melt polymerization:

[0034] a. Transport the nylon 66 salt solution to the concentration tank and heat it to 130°C for concentration, concentrate the nylon 66 salt solution with a mass percentage of 50% to 70%, and discharge a large amount of water vapor;

[0035] b. The nylon 66 salt solution concentrated in step a is transported to the reactor (the reaction temperature is controlled at 255-268°C, the reaction time is controlled at 2.5~3.0h, and the reaction pressure is 1.85±0.5MPa) for high-pressure dehydration and polycondensation to form prepolymer then sent to the flash evaporator, the pressure of the material is reduced from 1.85MPa to normal pressure after passing through the multi-section different-diameter material pipe, and the vapor-liquid mixed polymer is generated;

[0036] c. The vapor-liquid mixed polymer obtained in step b is subjected...

Embodiment 2

[0049] A production method of high-elongation special-shaped nylon 66 fiber, comprising the following steps:

[0050] (1) Melt polymerization:

[0051] a. Transport the nylon 66 salt solution to the concentration tank and heat it to 134°C for concentration, concentrate the nylon 66 salt solution with a mass percentage of 55% to 74%, and discharge a large amount of water vapor;

[0052] b. The nylon 66 salt solution concentrated in step a is transported to the reactor (the reaction temperature is controlled at 255-268°C, the reaction time is controlled at 2.5~3.0h, and the reaction pressure is 1.85±0.5MPa) for high-pressure dehydration and polycondensation to form prepolymer The material is then sent to the flash evaporator, and the pressure of the material is reduced from 1.85MPa to normal pressure after passing through the multi-section different-diameter material pipe to generate a vapor-liquid mixed polymer;

[0053] c. The vapor-liquid mixed polymer obtained in step b ...

Embodiment 3

[0066] A production method of high-elongation special-shaped nylon 66 fiber, comprising the following steps:

[0067] (1) Melt polymerization:

[0068] a. Transfer the nylon 66 salt solution to the concentration tank and heat it to 132°C for concentration, concentrate the nylon 66 salt solution with a mass percentage of 53% to a nylon 66 salt solution with a mass percentage of 72%, and discharge a large amount of water vapor;

[0069] b. The nylon 66 salt solution concentrated in step a is transported to the reactor (the reaction temperature is controlled at 255-268°C, the reaction time is controlled at 2.5~3.0h, and the reaction pressure is 1.85±0.5MPa) for high-pressure dehydration and polycondensation to form prepolymer then sent to the flash evaporator, the pressure of the material is reduced from 1.85MPa to normal pressure after passing through the multi-section different-diameter material pipe, and the vapor-liquid mixed polymer is generated;

[0070] c. The vapor-li...

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Abstract

The invention discloses high-elongation special-shaped polyamide fiber 66 and a production method thereof. The production method includes steps of nylon 66 saline solution, high-temperature concentration, high-pressure reaction, flash depressurization, fusion continuous polymerization, spinning, cooling, oiling, second-time drafting, loosening thermoforming and winding. Formic acid relative viscosity of the polyamide fiber 66 is 72-80, breaking strength is 3.0-4.0g / D, elongation at break is 40-50%, hot air shrinkage percentage of 177 DEG Cx2min is 3.0-5.0%, and monofilament linear density is 6-20dtex. The h igh-elongation special-shaped polyamide fiber 66 has the advantages of moderate strength, light weight, fatigue resistance, impact resistance, wear resistance, softness and easiness in processing, thereby being widely applied in the field of high-grade sports goods; a gap in the high-elongation special-shaped polyamide fiber 66 is filled in, and quality of the polyamide fiber 66 is up to international advanced level, so that the polyamide fiber 66 has high social and economic benefit.

Description

technical field [0001] The invention belongs to the technical field of synthetic fiber production, and in particular relates to a high-elongation special-shaped nylon 66 fiber and a production method thereof. Background technique [0002] The scientific name of nylon is polyamide fiber, which is the general name of polyamide fibers produced in China. It is called nylon internationally. It has the characteristics of high strength, good wear resistance and good resilience. Its wear resistance is 10 times that of cotton fiber. times, 10 times that of dry viscose fiber, and 140 times that of wet fiber. The main varieties of nylon are nylon 6 and nylon 66. The physical properties of the two are not much different. They have good moth resistance and corrosion resistance. They can be purely spun or blended for various clothing and knitwear. Among the better varieties. Nylon 66 fiber is widely used in industry, such as cord fabrics, rotating belts, hoses, ropes, fishing nets, tire...

Claims

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Application Information

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IPC IPC(8): D01F6/80D01D5/253D01D5/096D01D5/16D01D5/088D01D10/02D01D7/00
CPCD01D5/088D01D5/096D01D5/16D01D5/253D01D7/00D01D10/02D01F6/80
Inventor 王安乐常梅英吕文娟李鹏翔侯欲晓侯建民侯彦波王金林张超赵二伟赵江山薛山谢巧丽郭自现李连臣
Owner SHEN MA INDUSTRY CO LTD
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