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Multistage stretching technology for manufacture aramid fiber III

A technology for controlling stretching and process, applied in the field of chemical synthetic fibers, can solve the problems that the stretching process is not suitable for aramid III fibers, etc., and achieve the effects of easy and stable control, low industrial cost and low cost

Active Publication Date: 2012-11-28
中蓝晨光化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problem that the existing stretching process is not suitable for aramid III fiber, and the standard aramid III fiber cannot be made into high-strength and high-modulus aramid III fiber by improving the mechanical properties of the fiber, and provides a spinning method for aramid III fiber The stretching process in the filament process makes it possible to further improve the mechanical properties of the fiber by changing the stretching process in the fiber forming process on the basis of the aramid III standard product, and obtain high-strength and high-modulus aramid III fiber

Method used

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  • Multistage stretching technology for manufacture aramid fiber III

Examples

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Comparison scheme
Effect test

Embodiment 1

[0031] A multi-stage drawing process for manufacturing high-strength and high-modulus aramid fiber III, comprising the following process steps:

[0032] A, the spinning dope is extruded into a thin stream through the spinneret, and the thin stream is solidified in the first coagulation bath, and the stretching rate is controlled to -75% to carry out negative stretching treatment;

[0033] B, coagulated in the first coagulation bath and the fiber after the negative stretching treatment enters the second coagulation bath, and the stretching rate is controlled to 90% for plasticizing and stretching treatment;

[0034] C. The fibers coagulated and stretched in the second coagulation liquid enter the washing machine for washing;

[0035] D. Send the washed fiber into a wet heat stretching bath for plasticizing and stretching treatment again, and control the stretching rate to 1%, to obtain the product high-strength and high-modulus aramid III fiber.

Embodiment 2

[0037] A multi-stage drawing process for manufacturing high-strength and high-modulus aramid fiber III, comprising the following process steps:

[0038] A, the spinning dope is extruded into a thin stream through the spinneret, and the thin stream is solidified in the first coagulation bath, and the stretching rate is controlled to -30% for negative stretching treatment;

[0039] B, coagulated in the first coagulation bath and the fiber after negative stretching treatment enters the second coagulation bath, and the stretch rate is controlled to 150% for plasticizing and stretching treatment;

[0040] C. The fibers coagulated and stretched in the second coagulation liquid enter the washing machine for washing;

[0041] D. Put the washed fiber into the wet heat stretching bath for plasticizing and stretching treatment again, and control the stretching rate to 10%, to obtain the product high-strength and high-modulus aramid fiber III.

Embodiment 3

[0043] A multi-stage drawing process for manufacturing high-strength and high-modulus aramid fiber III, comprising the following process steps:

[0044] A, the spinning stock solution is extruded into a thin stream through the spinneret, and the thin stream is solidified in the first coagulation bath, and the stretching ratio is controlled to 52.5% to carry out negative stretching treatment;

[0045] B, coagulated in the first coagulation bath and the fiber after negative stretching treatment enters the second coagulation bath, and the stretching ratio is controlled to 120% for plasticizing and stretching treatment;

[0046] C. The fibers coagulated and stretched in the second coagulation liquid enter the washing machine for washing;

[0047] D. Send the washed fiber into a wet heat stretching bath for plasticizing and stretching again, and control the stretching rate to 5.5%, to obtain the product high-strength and high-modulus aramid III fiber.

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Abstract

The invention relates to a multistage stretching technology for manufacture aramid fiber III, which belongs to the technical field of chemical fiber. The multistage stretching technology comprises a negative stretching technology, plasticizing stretching treatment, water washing and plasticizing stretching treatment again to obtain final products. The multistage stretching technology can obviously improve the mechanical property of aramid fiber III, the multifilament stretching strength is increased to 32cN / dtex from 30cN / dtex, and the stretching modulus is increased to 950cN / dtex from 850cN / dtex. High-strength and high-modulus fiber obtained can be applied to applicable fields with higher market requirements.

Description

technical field [0001] The invention relates to a spinning process of aramid fiber III, more specifically, the invention relates to a multi-stage stretching process in the spinning process of manufacturing high-strength and high-modulus aramid fiber III, which belongs to the technical field of chemical synthetic fibers. Background technique [0002] Aramid III fiber is similar to Russia's APMOC fiber, which is produced by copolymerization of three monomers: terephthaloyl chloride, p-phenylenediamine, and 5(6)-amino-2-(4-aminophenyl)benzimidazole. become. The tensile strength and tensile modulus of this fiber are 38% and 20% higher than Dupont's Kevlar49 fiber, respectively. Aramid III fiber-reinforced composite materials are widely used in the fields of national defense, aerospace and civil high-end materials. Generally speaking: Aramid III fibers with strength >30cn / dtex and modulus >930cn / dtex are called high-strength and high-modulus aramid III fibers. [0003] E...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/12D01D10/02D01D10/06
Inventor 王凤德刘克杰杨文良曹先军陈超峰兰江彭涛
Owner 中蓝晨光化工有限公司
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