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Polyamide 56 fiber with low boiling water shrinkage rate and preparation method and application of polyamide 56 fiber

A boiling water shrinkage, polyamide technology, applied in the field of polyamide materials, can solve problems such as difficulty in reducing boiling water shrinkage, and achieve the effects of reducing the greenhouse effect and reducing emissions

Active Publication Date: 2021-02-26
CATHAY R&D CENT CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to reduce the boiling water shrinkage rate by using polyamide pre-oriented yarn and textured yarn technology

Method used

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  • Polyamide 56 fiber with low boiling water shrinkage rate and preparation method and application of polyamide 56 fiber
  • Polyamide 56 fiber with low boiling water shrinkage rate and preparation method and application of polyamide 56 fiber
  • Polyamide 56 fiber with low boiling water shrinkage rate and preparation method and application of polyamide 56 fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Example 1: Preparation of low boiling water shrinkage polyamide 56 pre-oriented yarn

[0086] (1) The polyamide 56 resin is heated to a molten state by a screw to form a polyamide 56 melt.

[0087] (2) The polyamide 56 melt is transported to the spinning box through the melt pipeline, and after being accurately metered by the metering pump, it is injected into the spinning assembly and extruded from the spinneret hole.

[0088] (3) cooling, oiling, stretching and winding the extruded as-spun fibers to obtain the polyamide 56 pre-oriented filaments.

[0089] In step (1), the relative viscosity of the polyamide 56 resin is 2.5; the oligomer content of the polyamide 56 resin is 0.8wt%; the moisture content of the polyamide 56 resin is 800ppm; the number average molecular weight is 18000 , the molecular weight distribution is 1.6;

[0090] The screw is heated in four zones, wherein the temperature in the first zone is 250°C; the temperature in the second zone is 270°C; th...

Embodiment 2

[0095] Embodiment 2: Preparation of low boiling water shrinkage polyamide 56 pre-oriented yarn

[0096] (1) The polyamide 56 resin is heated to a molten state by a screw to form a polyamide 56 melt.

[0097] (2) The polyamide 56 melt is transported to the spinning box through the melt pipeline, and after being accurately metered by the metering pump, it is injected into the spinning assembly and extruded from the spinneret hole.

[0098] (3) cooling, oiling, stretching and winding the extruded as-spun fibers to obtain the polyamide 56 pre-oriented filaments.

[0099] In step (1), the relative viscosity of the polyamide 56 resin is 2.7; the oligomer content of the polyamide 56 resin is 1.0wt%; the moisture content of the polyamide 56 resin is 900ppm; the number average molecular weight is 19000 , the molecular weight distribution is 1.8;

[0100]The screw is heated in four zones, wherein the temperature in the first zone is 255°C; the temperature in the second zone is 270°C; ...

Embodiment 3

[0105] Embodiment 3: Preparation of low boiling water shrinkage polyamide 56 pre-oriented yarn

[0106] (1) The polyamide 56 resin is heated to a molten state by a screw to form a polyamide 56 melt.

[0107] (2) The polyamide 56 melt is transported to the spinning box through the melt pipeline, and after being accurately metered by the metering pump, it is injected into the spinning assembly and extruded from the spinneret hole.

[0108] (3) cooling, oiling, stretching and winding the extruded as-spun fibers to obtain the polyamide 56 pre-oriented filaments.

[0109] In step (1), the relative viscosity of the polyamide 56 resin is 2.4; the oligomer content of the polyamide 56 resin is 1.15wt%; the moisture content of the polyamide 56 resin is 1000ppm; the number average molecular weight is 20000 , the molecular weight distribution is 1.7;

[0110] The screw is heated in four zones, wherein the temperature in the first zone is 250°C; the temperature in the second zone is 272°...

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Abstract

The invention belongs to the technical field of polyamide materials, and provides polyamide 56 pre-oriented yarn and textured yarn with low boiling water shrinkage rates and preparation methods and application of the polyamide 56 pre-oriented yarn and textured yarn. The production raw materials of a polyamide 56 fiber comprise 1,5-pentamethylene diamine and adipic acid; or polyamide resin 56 is obtained through polymerization by taking 1,5-pentamethylene diamine and the adipic acid as monomers; wherein the boiling water shrinkage rate of the polyamide 56 fiber is below 9%, and the polyamide 56fiber comprises the polyamide 56 pre-oriented yarn with the low boiling water shrinkage rate and the polyamide 56 textured yarn with the low boiling water shrinkage rate. The polyamide 56 fiber has relatively good mechanical properties, dyeing uniformity and dimensional stability, and the preparation method of the polyamide 56 fiber does not need to modify existing polyamide fiber elasticizing equipment, so that the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of polyamide materials, and relates to a polyamide 56 pre-oriented yarn and textured yarn with low boiling water shrinkage, a preparation method and application thereof. Background technique [0002] Polyamide fiber has a large shrinkage in boiling water, and the shrinkage is serious during the dyeing process, which is easy to cause color and flower phenomenon, especially in the cheese dyeing process, the shrinkage is large, due to the different tension inside and outside the yarn, the yarn near the bobbin has a larger tension , dyes are difficult to penetrate, not easy to dye, resulting in color difference in inner and outer layer dyeing, secondly, during the unwinding process of the bobbin, the tension is not the same after shrinkage, the unwinding is difficult, it is easy to cause broken filaments, increase the processing difficulty, and the production cost is relatively large. Boiling water shrinks great...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/60D01D5/08D01D5/088D01D5/092D02G1/20
CPCD01F6/60D01D5/08D01D5/088D01D5/092D02G1/20C08G69/28D01F6/90C08L77/06D01F1/10D10B2331/02
Inventor 孙朝续刘修才
Owner CATHAY R&D CENT CO LTD
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