High-elasticity composite fiber and preparation method thereof

A composite fiber, high elasticity technology, applied in fiber processing, melt spinning, stretch spinning, etc., can solve the problems of poor elasticity, low crimp shrinkage of composite fibers, poor softness, etc., to reduce crystalline properties, excellent fluffy Sex, good shrinkage effect

Active Publication Date: 2018-03-30
CHINA TEXTILE ACADEMYTIANJINSCI & TECH DEV CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the small difference in heat shrinkage between the modified polyamide ester component and the conventional polyester component in the side-by-side composite fiber, the crimp shrinkage of the prepared composite fiber is low and the elasticity is poor; and the conventional polyester component of the composite fiber The modulus of the component is higher, resulting in a composite fiber with a higher modulus and less softness

Method used

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  • High-elasticity composite fiber and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0053] In this embodiment, the composite fiber is prepared by the following method:

[0054] (1) Blend terephthalic acid, ethylene glycol and isophthalic acid into a mixed slurry, wherein the molar ratio of isophthalic acid to terephthalic acid is 0.1:1, and the molar ratio of terephthalic acid to ethylene glycol The ratio is 1:1.2;

[0055] (2) Transport the mixed slurry in step (1) to the reactor for esterification reaction, the reaction temperature is 265°C, and the reaction is terminated when the esterification rate reaches 97%, to obtain a polyester pre-reaction melt;

[0056] (3) in the polyester pre-reaction melt of step (2), add the polyamide 6 that is equivalent to the relative viscosity of 10wt% of terephthalic acid weight in step (1) and be 2.4 to carry out polycondensation reaction, reaction temperature is 270 ℃, The reaction time is 3 hours. After the reaction is completed, the material is discharged and pelletized to obtain polyamide ester slices. The intrinsic ...

Embodiment 2

[0059] In this embodiment, the composite fiber is prepared by the following method:

[0060] (1) Terephthalic acid, ethylene glycol and 2-methyl-1,3-propanediol are formulated into a mixed slurry, wherein the molar ratio of 2-methyl-1,3-propanediol to terephthalic acid is 0.2: 1. The molar ratio of terephthalic acid to ethylene glycol is 1:1.05;

[0061] (2) transporting the mixed slurry in step (1) to the reactor for esterification reaction, the reaction temperature is 260° C., and when the esterification rate reaches 98%, the reaction is terminated to obtain a polyester pre-reaction melt;

[0062] (3) In the polyester pre-reaction melt in step (2), adding polyamide 56 with a relative viscosity equivalent to 20 wt % of terephthalic acid weight in step (1) is 2.8 for polycondensation reaction, and the reaction temperature is 275 ° C. The reaction time is 4 hours. After the reaction is completed, the material is discharged and pelletized to obtain polyamide ester slices. The i...

Embodiment 3

[0065] In this embodiment, the composite fiber is prepared by the following method:

[0066] (1) Blend terephthalic acid, ethylene glycol and 1,2-propanediol into a mixed slurry, wherein the molar ratio of 1,2-propanediol to terephthalic acid is 0.05:1, and terephthalic acid and ethylene glycol The molar ratio is 1:1.1;

[0067] (2) Transport the mixed slurry in step (1) to the reactor for esterification reaction, the reaction temperature is 270°C, and when the esterification rate reaches 92%, the reaction is terminated to obtain a polyester pre-reaction melt;

[0068] (3) in the polyester pre-reaction melt of step (2), adding the polyamide 66 corresponding to the relative viscosity of 5wt% terephthalic acid weight in the step (1) is 4.0 to carry out polycondensation reaction, and the reaction temperature is 280 ℃, The reaction time is 4 hours. After the reaction is completed, the material is discharged and pelletized to obtain polyamide ester slices. The intrinsic viscosity ...

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Abstract

The invention relates to the field of textile technology, in particular to a high-elasticity composite fiber and a preparation method thereof. The composite fiber has a crimp shrinkage of 30.3-79.8%,preferably 48.6-79.8%, more preferably 65.3-79.8%, so that the composite fiber has a high crimp shrinkage; and the preparation method of the composite fiber comprises the following steps: carrying outcondensation polymerization on a polyester pre-reaction melt containing a steric hindrance monomer and an aliphatic polyamide melt to obtain polyamide ester, and then spinning the polyamide ester andthe aliphatic polyamide to prepare the composite fiber. The composite fiber provided by the invention has a three-dimensional coiled structure, excellent fluffiness and elasticity and a particularlysoft hand feeling, and can be widely used for wearing textiles.

Description

technical field [0001] The invention relates to the technical field of textiles, in particular to a high elastic composite fiber and a preparation method thereof. Background technique [0002] Among the numerous functional fiber varieties, elastic fibers occupy a solid position in the textile industry because they can give the human body a good sense of contact and play an irreplaceable role in clothing comfort, fluffy and warm. The certain elasticity of textile fabrics has become an inevitable development trend of clothing textiles. Elastic fiber is mainly divided into polyurethane fiber, diene elastic fiber, polyether ester elastic fiber, composite elastic fiber, polyolefin elastic fiber and hard elastic fiber according to its variety and composition. [0003] Composite elastic fiber is composed of two polymer components with good compatibility arranged continuously along the fiber axis in a side-by-side manner. Using the difference in thermal shrinkage of each component,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/12D01F8/14D01D5/08D01D5/16D01D5/32D01D10/02C08G69/44
CPCC08G69/44D01D5/08D01D5/16D01D5/32D01D10/02D01F8/12D01F8/14
Inventor 邱志成李鑫金剑刘玉来
Owner CHINA TEXTILE ACADEMYTIANJINSCI & TECH DEV CO LTD
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