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High-strength ultra-low thermal contraction nylon 66 fiber and production method thereof

A production method and ultra-low heat technology, applied in fiber processing, filament generation, melt spinning, etc., can solve the problems of unevenness between production batches, low production efficiency, low dry heat shrinkage rate, etc., and achieve production efficiency. High, improved production efficiency, advanced fiber properties

Inactive Publication Date: 2010-01-06
SHEN MA INDUSTRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a high-strength ultra-low heat shrinkage nylon 66 fiber and its production method, provide a kind of nylon 66 fiber with high strength and low dry heat shrinkage, and solve the problem of low production efficiency and low production batch size of the current two-step method. The problem of large unevenness

Method used

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  • High-strength ultra-low thermal contraction nylon 66 fiber and production method thereof

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Effect test

Embodiment 1

[0023] Through continuous polymerization of polyhexamethylene adipamide, a 95% (wt%) polyamide 66 formic acid relative viscosity 68 high-viscosity polymer melt is obtained, which is metered into the module and filtered by a high-precision metering pump, and the upper part of the filter layer is 16- 60 mesh sea sand, the lower part is composed of 4 layers of 50, 100, 300, 500 mesh filter screens. The filtered melt is extruded and spun by the metering pump to form a tow. The tow is cooled by the side air blower. After being oiled by the oil tanker, it enters 4 pairs of hot rollers for stretching and shaping, and the uniform network degree is formed by the network device. Finally, the four-head winder is wound into a silk tube to obtain a high specification of 210D / 36f. Ultra-low heat shrinkage nylon 66 fiber product. See Table 1 for drawing and shaping process, winding speed and product performance.

Embodiment 2

[0025] The raw materials are the same as in Example 1, using 4 pairs of hot rollers to stretch and shape, and double-ended winding machine to wind and form, to obtain a 630D / 108f specification high-strength ultra-low thermal shrinkage nylon 66 fiber product. See Table 1 for drawing and shaping process, winding speed and product performance.

Embodiment 3

[0027] The raw materials are the same as in Example 1, using 4 pairs of hot rollers to stretch and shape, and double-end winding machine to wind and form, to obtain 1050D / 140f specifications of high-strength ultra-low heat shrinkage nylon 66 fiber product. See Table 1 for drawing and shaping process, winding speed and product performance.

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Abstract

The invention belongs to the technical field of synthetic fiber production, in particular relates to a high-strength ultra-low thermal contraction nylon 66 fiber and a production method thereof. The nylon 66 fiber is characterized in that the strength is 8.0-9.5g / d, the elongation at break is 18-24%, the free hot air shrinkage rate at 180 DEG is 2.0-4.0%, the linear density is 150-1050D, and the monofilament linear density is 4.0-8.0D. The high-strength ultra-low thermal contraction nylon 66 fiber has advanced performance and can meet higher industrial use requirements; the production adopts a one-step method, thereby achieving high-speed, continuous and stable production with high production efficiency and high yield and uniform and stable performance of products in different batches; and the production method has short technological processes and obvious economic benefit.

Description

(1) Technical field [0001] The invention belongs to the technical field of synthetic fiber production, and particularly relates to a high-strength ultra-low thermal shrinkage nylon 66 fiber and a production method thereof. (2) Background technology [0002] High-strength (breaking strength not less than 8.0g / d) nylon 66 fiber has been widely used in industry for various purposes, such as a large number of applications in tire cords, conveyor belt canvas, cables, industrial lifting belts, etc. To manufacture tire cords, the original yarn was used in large quantities for bias tires in the past, requiring high strength and moderate dry heat shrinkage performance. The dry heat shrinkage performance is generally 6-10% at 180°C. However, with the development of society, for some new application areas, such as radial tire cords, high-speed sewing threads, industrial fabrics, rubber-reinforced products such as hoses and conveyor belts, it is hoped that the raw yarn has a lower strength w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/098D01D5/096D01D1/10D01D10/02D01D11/00D02J1/22D02J13/00D02J1/08D01F6/60
Inventor 马源段文亮张兆锋郑晓广王良李新谷慧平吕文娟王征黎刘晓光杨朝勇高勇白荣光徐建国李晓辉何泽涵
Owner SHEN MA INDUSTRY CO LTD
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