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Short polyamide 5X fiber and preparation method and application

A polyamide and staple fiber technology, applied in the direction of single-component polyamide rayon, single-component copolyamide rayon, melt spinning, etc., can solve the difficulties of subsequent spinning, low elongation, and inability to Meet other issues, to achieve the effect of reducing greenhouse effect, reducing emissions, improving durability and economy

Active Publication Date: 2017-06-27
CATHAY R&D CENT CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN105887230A discloses a polyamide 56 short fiber and its melt direct spinning preparation method, although its short fiber breaking strength is 3.5-5.2cN / dtex, its elongation at break is only 11-14%, and its elongation is relatively It is too small to cause difficulties for subsequent spinning, and it can no longer meet the requirements of faster and faster high-speed weaving, knitting or weaving machines

Method used

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  • Short polyamide 5X fiber and preparation method and application
  • Short polyamide 5X fiber and preparation method and application
  • Short polyamide 5X fiber and preparation method and application

Examples

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preparation example Construction

[0102]

[0103] A preparation method of polyamide 5X short fiber, it may further comprise the steps:

[0104] (1) Polymerizing 1,5-pentamethylenediamine and dicarboxylic acid to form a polyamide 5X melt; or, heating polyamide 5X (polyamide 5X resin) to a molten state to form a polyamide 5X melt;

[0105] (2), the polyamide 5X melt is spun to form spun silk;

[0106] (3) Polyamide 5X staple fibers are obtained after the as-spun silk is processed.

[0107] Wherein, in the step (1), the polyamide 5X is a polyamide 5X resin chip.

[0108] The relative viscosity of polyamide 5X resin chip can be 2.65-3.00.

[0109] Because polyamide 5X resin has stronger water absorption, therefore, can carry out drying before it is heated and melted, and drying temperature is 100-150 ℃, and drying time is 10-30 hours, and the polyamide 5X resin after drying The moisture content is 50-1500ppm, preferably 200-800ppm, more preferably 300-700ppm, further preferably 400-600ppm.

[0110] The spinn...

Embodiment 1

[0145] The present embodiment provides a kind of preparation method of polyamide 56 short fiber, it comprises the steps:

[0146] (1), select polyamide 56 slices with a relative viscosity of 2.70, dry under nitrogen protection, the drying temperature is 135°C, and the drying time is 16h. The moisture content of the dried polyamide 56 resin slices is 500ppm, and the dried polyamide The 56 slices enter the single-screw machine through the sealed nitrogen protection silo for heating and melting to obtain the polyamide 56 melt;

[0147] (2), polyamide 56 melt is sprayed out by the spinneret that number of holes is 1000f, and spinneret drawing ratio is 300, and after polyamide 56 melt sprays out spinneret hole, cools by ring blowing, and wind temperature is 25°C, with a wind speed of 0.8m / s, to obtain as-spun silk;

[0148] (3), as-spun silk is fed into the silk barrel by feeding rollers to obtain raw silk, and the raw silk is stretched in three stages by cluster frame, and the to...

Embodiment 2

[0151] The present embodiment provides a kind of preparation method of polyamide 56 short fiber, it comprises the steps:

[0152] (1), select polyamide 56 slices with a relative viscosity of 2.95, dry under nitrogen protection, the drying temperature is 135°C, and the drying time is 10h. The moisture content of the dried polyamide 56 resin slices is 1000ppm, and the dried polyamide The 56 slices enter the single-screw machine through the sealed nitrogen protection silo for heating and melting to obtain the polyamide 56 melt;

[0153] (2), polyamide 56 melt is sprayed out by the spinneret plate that number of holes is 800f, and spinneret drawing ratio is 100, and after polyamide 56 melt is sprayed out spinneret hole, cools by ring blowing, and wind temperature is 25°C, with a wind speed of 0.5m / s, to obtain as-spun silk;

[0154] (3), as-spun silk is fed into the silk barrel by feeding rollers to obtain raw silk, and the raw silk is stretched in three stages by cluster frame, ...

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Abstract

The invention provides a short polyamide 5X fiber, a preparation method thereof and application in preparation of blended yarns. Theproduction raw materials for the short polyamide 5X fiber include 1,5 pentamethylene diamine and dicarboxylic acid, or polyamide 5X is obtained by polymerizing the 1,5 pentamethylene diamine and the dicarboxylic acid which serve as monomers. The breaking strength of the short polyamide 5X fiber is 3.0-6.5 cN / dtex. The preparation method comprises the following steps that 1, the 1,5 pentamethylene diamine and the dicarboxylic acid are polymerized to form a polyamide 5X melt, or polyamide 5X resin is heated to a melt state, and the polyamide 5X melt is formed; 2, the polyamide 5X melt is subjected to spinning to form a spun filament; 3, the spun filament is processed to obtain the short polyamide 5X fiber. The short polyamide 5X fiber has higher strength, meanwhile has a certain elongation at break and low thermal shrinkage property and especially meets blending yarn requirements.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a polyamide 5X short fiber and its preparation method and application. Background technique [0002] With the improvement of people's living standards, people's concept of fiber has not only stopped at cotton wool fiber, more and more fibers have entered people's life, especially polyamide fiber, which is famous for its plump feel, Wear resistance, bright colors and other advantages are widely used in all kinds of clothing, and are frequently used as raw materials for high-end fabrics. The raw material of polyamide 56, pentamethylenediamine, can be prepared from biological sources, reducing carbon emissions, and has High moisture regain, the prepared fiber has good hygroscopicity and deep dyeing. [0003] Fabrics are usually divided into continuous filament yarns and yarns made from staple fibers, one of the advantages of staple fibers is that they are easy to blend, esp...

Claims

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Application Information

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IPC IPC(8): D01F6/60D01F6/80D01F6/90D01D5/08D01D1/00D01D4/02D01D5/088D01D5/16D02G1/20D02G1/16D02G3/04
CPCD01D1/00D01D4/02D01D5/08D01D5/088D01D5/16D01F6/60D01F6/80D01F6/90D02G1/16D02G1/205D02G3/04D10B2331/02
Inventor 孙朝续徐晓辰秦兵兵刘修才
Owner CATHAY R&D CENT CO LTD
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