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Copolymer fiber with higher breaking strength and preparation process of copolymer fiber

A technology for the preparation of copolymerized fibers, applied in fiber treatment, fiber chemical characteristics, rayon manufacturing, etc., can solve the problems of low strength, inconvenient use, and fracture of copolymerized fibers, and achieve high storage modulus and loss modulus , low loss tangent, and good low temperature service performance

Pending Publication Date: 2020-08-11
JIANGSU HAIYANG CHEM FIBERS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, most of the copolymer fibers currently on the market have relatively single functionality and are very inconvenient to use. The overall strength of traditional copolymer fibers is not high, and they are prone to breakage, which affects the use effect of copolymer fibers

Method used

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  • Copolymer fiber with higher breaking strength and preparation process of copolymer fiber
  • Copolymer fiber with higher breaking strength and preparation process of copolymer fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A copolymer fiber with higher breaking strength and its preparation process, comprising: a fiber body 1, the fiber body 1 is formed by bundling several fiber monofilaments 2, and the outer wall surface of the fiber monofilaments 2 is provided with a raised portion 4. There is a gap 3 between two adjacent fiber monofilaments 2;

[0028] Wherein, the composition and content (percentage by weight) of the fiber monofilament 2 are: PA666 chip 50%-80%, nylon 66 salt 4%-8%.

[0029] Wherein, the protruding parts 4 are uniformly distributed on the surface of the fiber monofilament 2 at intervals, and the protruding parts 4 have a rectangular structure.

[0030] Wherein, the PA666 chips are prepared from PA666 resin through a two-step process of melt spinning and post-drawing. The combination of PA666 segments is:

[0031] .

Embodiment 2

[0033] A kind of preparation technology of the copolymer fiber with higher breaking strength, comprises the following steps:

[0034] S1. Preparation of PA666 slices: first, PA666 resin slices are prepared by melt spinning-post-drawing two-step method to obtain PA666 resin slices;

[0035] S2. Drying: fully dry the PA666 resin slices prepared above in a JM-500ZDGX vacuum drum oven;

[0036] S3, Melt spinning: Subsequently, put the dried PA666 resin slice and nylon 66 salt into the nanocomposite fiber melt spinning forming test equipment, and carry out the melt spinning experiment on the PA666 resin slice through the nanocomposite fiber melt spinning forming test equipment;

[0037] S4. Drafting: Finally, the post-drawing process is completed in the drafting machine, and the PA666 copolymerized fiber can be obtained.

[0038] Among them, in step S2, the drying procedure is to first vacuum dry at 65 °C and pre-crystallize for 10 h, then raise the temperature to 95 °C for 8 h to...

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Abstract

The invention discloses a copolymer fiber with higher breaking strength and a preparation process of the copolymer fiber. The copolymer fiber comprises a fiber body, wherein the fiber body is formed by bundling a plurality of fiber monofilaments; convex parts are arranged on the surfaces of the outer walls of the fiber monofilaments; and a gap is formed between every two adjacent fiber monofilaments. According to the copolymer fiber with higher breaking strength and the preparation process of the copolymer fiber, the mechanical property analysis on the copolymer fiber shows that the PA666 fiber has higher breaking strength, when the addition amount of nylon 66 salt is 8%, the breaking strength increases from 5.62 cN / dtex of a PA6 fiber to 6.35 cN / dtex, and the breaking elongation decreasesfrom 24.70% to 17.40%, so that while the strength is increased, sufficient ductility during machining is still ensured, and better hand feeling requirements of a fiber product are met; the crystallinity of the PA666 fiber decreases, the orientation degree of a crystal region changes little, but an orientation factor of sound velocity increases; and the PA666 fiber has higher storage modulus and loss modulus, and with 4% and 8% of the addition amount of the nylon 66 salt, the PA666 fiber has lower loss tangent value at low temperature and better low temperature service performance.

Description

technical field [0001] The invention relates to the technical field of textile industry, in particular to a copolymerized fiber with higher breaking strength and a preparation process thereof. Background technique [0002] Polyamide 66 (PA66) fiber is also called polyhexamethylene adipamide fiber and nylon 66. One of the main varieties of aliphatic polyamide fibers. The resin is prepared from adipic acid and hexamethylenediamine, and then spun by melt spinning. The main products are filament, but also textured and short. Fiber properties: melting point 255 ~ 264 ℃. Glass transition temperature (n) 50 ℃, density 1.149 / cm3. Ordinary fiber strength 4.9 ~ 5.6 cN / dtex. The strong wire is 5.7~7.7cN / dtex. Elongation 26% to 40%. The rebound rate is 95% to 100% when the elongation is 3%. Water absorption 4%. Soluble in cresol. Can be machine-woven, knitted, warp-knitted and so on. Used in socks, underwear, shirts, sweatshirts, carpets, bedding upholstery, etc. It can be bl...

Claims

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Application Information

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IPC IPC(8): D01F1/10D01F6/90D01D5/098D01D5/12
CPCD01D5/098D01D5/12D01F1/10D01F6/90
Inventor 马驰陈建新沈家广吉增明孔令根陆灯红
Owner JIANGSU HAIYANG CHEM FIBERS
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