Industrial polyester filament for high-strength ultra-low-elongation safety belt and production method of industrial polyester filament

A manufacturing method and safety belt technology, applied in the direction of filament/thread forming, melting of filament raw materials, melt spinning method, etc., can solve the problems of high breaking strength, strong binding ability, low elongation, etc., and achieve improved flexibility Good flexibility, good flexibility, low modulus

Active Publication Date: 2012-12-05
ORIENTAL IND SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of polyester industrial filament and manufacture method thereof for high-strength ultra-low extension type safety belt, the polyester industrial filament manufactured by the method of the present invention has both kept the production operation of polyester filament simple, The advantages of low cost of raw materials, and improved dyeability of seat belts, uniform dyeing, good dyeability, high breaking strength, low elongation, small deformation (that is, strong binding ability), very suitable for the manufacture of front seat belts , making up for the deficiencies in the prior art

Method used

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  • Industrial polyester filament for high-strength ultra-low-elongation safety belt and production method of industrial polyester filament
  • Industrial polyester filament for high-strength ultra-low-elongation safety belt and production method of industrial polyester filament
  • Industrial polyester filament for high-strength ultra-low-elongation safety belt and production method of industrial polyester filament

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Embodiment 1

[0030] 1. The process parameters are as follows:

[0031]

[0032]

[0033] Second, the specific production process includes the following steps:

[0034] A. Preparation of high-viscosity polyester chips: using continuous solid-state polymerization method, first pre-crystallize low-viscosity polyester chips at a temperature of 170°C for 0.35 hours, and then enter a crystallization pre-crystallization temperature of 230°C The heater stays for 4.2 hours, then enters the main reactor, and performs solid phase repolymerization under the protection of hot nitrogen and a high temperature of 230°C. The material stays in the main reactor for a long time, generally about 22 hours, until the intrinsic viscosity is reached. Increased from conventional 0.63-0.67dL / g to 1.00dL / g, carboxyl-COOH is 12.0mol / t; diethylene glycol is 0.90%, and high-viscosity polyester chips are produced when the moisture content of the slices is reduced to 25ppm;

[0035] B. Impurity removal of high-visc...

Embodiment 2

[0041] 1. The process parameters are as follows:

[0042]

[0043]

[0044] Second, the specific production process includes the following steps:

[0045] A. Preparation of high-viscosity polyester chips: adopt continuous solid-state polymerization method, first pre-crystallize low-viscosity polyester chips at a temperature of 170°C for 0.35 hours, and then enter a crystallization preheating temperature of 230°C The reactor stays for 4.2 hours, then enters the main reactor, and performs solid phase repolymerization under the protection of hot nitrogen and a high temperature of 230 ° C. The material stays in the main reactor for a long time, generally about 22 hours, so that the intrinsic viscosity is changed from conventional 0.63-0.67dL / g increased to 1.00dL / g, carboxyl-COOH is 12.0mol / t; diethylene glycol is 0.90%, and when the moisture content of the slice is reduced to 25ppm, high-viscosity polyester chips are produced;

[0046] B. Impurity removal of high-viscosity...

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PUM

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Abstract

The invention relates to an industrial polyester filament for a high-strength ultra-low-elongation safety belt and a production method of the industrial polyester filament. The production method comprises the following steps of: A) high-viscosity polyester chip preparation; B) high-viscosity polyester chip impurity removal; C) melt spinning; and D) drafting, heat setting and winding. The number of the industrial polyester filaments produced by adopting the method is 72-144F, the fineness is 1100-2222dtex, the breaking strength can reach more than 7.80cN/dtex, the fixed-load elongation can reach 4-6 percent under a condition of 11.1KN and the controllable oil content is lower than 0.30-0.60 percent. The industrial polyester filament for the high-strength ultra-low-elongation safety belt and the production method of the industrial polyester filament have the beneficial effects that the breaking strength of the safety belt which is provided by using the obtained industrial polyester filaments can reach 35KN and is much higher than the breaking strength being 28-33KN of the existing safety belt, the physical and mechanical performance is good and the industrial polyester filament is an optimum raw material for producing front-row safety belts; the weaving performance is good, the dyeing uniformity of the safety belt is good due to lower fiber oil content, the gloss is stable, and chromatic aberration and stains do not exist; the waste polyester fibers can be recycled, the energy is saved, the environment is protected and the operating cost is reduced; and the operation is simple to conduct, the process flow is short, the automation level is high and the development space is very great.

Description

technical field [0001] The invention belongs to a method for manufacturing polyester industrial filaments, in particular to a polyester industrial filament for high-strength and ultra-low-elongation safety belts and a manufacturing method thereof. Background technique [0002] Car safety belt is the device that is used to ensure that passengers and drivers are injured when the vehicle body is hit violently to prevent passengers from being ejected by the air bag. It is composed of seat belt fabric, fixing device and buckle, among which the seat belt fabric is the core component. When the vehicle is hit violently, the seat belt can play a buffer role, effectively preventing or reducing the occupant's injury caused by the secondary collision. In order to achieve proper buffering effect, seat belt fabric must have high strength, stable extensibility and good energy absorption. At the same time, in order to make the seat belt have high durability, the seat belt fabric should ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/08D01D1/04D01D7/00D01D5/096D01D5/088
Inventor 李俊隆王好龙
Owner ORIENTAL IND SUZHOU
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