A kind of preparation method of polyester nylon composite elastic fiber

A composite technology of elastic fiber and polyester nylon, which is applied in the field of spinning to achieve good crimp elasticity and improved compatibility

Active Publication Date: 2021-01-01
ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The compatibility of polyester and nylon can be changed by in-situ generation of compatibilizer and external compatibilizer. The former discloses the method of in-situ anion polymerization of caprolactam in Chinese patent document 1556143 A. The generated PA6 and the PET in the system pass through End group reaction to obtain polyester nylon block copolymers, physical methods can be obtained by adding compatibilizers such as epoxy resin, polyolefin grafts or ionomers to obtain blended alloys, but the above two methods are suitable for polyester nylon melting Blending improves compatibility, but there are few reports on improving the compatibility of polyester and nylon side-by-side composites by modifying the third monomer

Method used

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  • A kind of preparation method of polyester nylon composite elastic fiber
  • A kind of preparation method of polyester nylon composite elastic fiber
  • A kind of preparation method of polyester nylon composite elastic fiber

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preparation example Construction

[0030] A preparation method of polyester nylon composite elastic fiber, comprising the following steps:

[0031] 1) Adding a third monomer with a total monomer amount of 1.5 to 2.5 mol / % to polyester monomers to synthesize modified polyester chips.

[0032] 2) Drying the modified polyester slices and nylon 6 slices respectively. The drying temperature of the modified polyester chips is 120-140° C., the drying time is 20 hours, and the water content of the resin after drying treatment is less than 30 ppm. The drying temperature of nylon 6 chips is 90-100°C, the drying time is 24 hours, and the water content of the resin after drying treatment is less than 100ppm.

[0033] Blend the dried modified polyester chips and nylon 6 chips, wherein the intrinsic viscosity of the modified polyester chips is 0.50-0.65dl / g, the relative viscosity of the nylon 6 chips is 2.47-2.52, the modified polyester chips and nylon The mass ratio of slices is 80:20-60:40.

[0034] Polyester and nylon...

Embodiment 1

[0041] A preparation method of polyester nylon composite elastic fiber, comprising the following steps:

[0042] 1) Add a third monomer of 2 mol / % total monomer amount to the polyester monomer, the third monomer is sodium ethylene glycol sulfonate isophthalate, and synthesize modified polyester chips.

[0043] 2) Drying the modified polyester slices and nylon 6 slices respectively. The drying temperature of the modified polyester chips is 130°C, the drying time is 20 hours, and the water content of the resin after drying treatment is less than 30ppm. The drying temperature of nylon 6 chips is 95°C, the drying time is 24 hours, and the water content of the resin after drying treatment is less than 100ppm.

[0044] The modified polyester chips and nylon 6 chips that have been dried are blended for 3 minutes, wherein the intrinsic viscosity of the modified polyester chips is 0.50dl / g, the relative viscosity of the nylon 6 chips is 2.48, and the quality of the modified polyester ...

Embodiment 2

[0051] A preparation method of polyester nylon composite elastic fiber, comprising the following steps:

[0052] 1) Add a third monomer with a total monomer amount of 2 mol / % to the polyester monomer, the third monomer is sodium ethylene glycol phthalate sulfonate, and synthesize modified polyester chips.

[0053] 2) Drying the modified polyester slices and nylon 6 slices respectively. The drying temperature of the modified polyester chips is 130°C, the drying time is 20 hours, and the water content of the resin after drying treatment is less than 30ppm. The drying temperature of nylon 6 chips is 100°C, and the drying time is 24 hours. After drying, the water content of the resin is less than 100ppm.

[0054] The modified polyester chips and nylon 6 chips that have been dried are blended for 3 minutes, wherein the intrinsic viscosity of the modified polyester chips is 0.52dl / g, the relative viscosity of the nylon 6 chips is 2.48, and the quality of the modified polyester chip...

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Abstract

The invention relates to the field of spinning, and discloses a preparation method of polyster / chinlon composite elastic fiber. The method comprises the following steps of (1) adding third monomers into polyster monomers to prepare modified polyster chips; (2) blending the modified polyster chips and chinlon 6 chips; then, performing melting blending to obtain polyster / chinlon blending chips; (3)drying the polyster / chinlon blending chips; respectively melting the polyster / chinlon chips and chinlon 6 chips to obtain polyster / chinlon blending spinning melt and polyster spinning melt; performingparallel merging extrusion; performing side blowing cooling, stretching, hot shaping and reeling to obtain the polyster / chinlon composite elastic fiber. In the polyster synthesis process, the third monomers are added; the modified polyster chips are prepared; after the melting blending of the modified polyster and the chinlon, the polyster and chinlon compatibility is improved; the fiber subjected to composite spinning with polyster and chinlon has the cross section of a dumbbell-shaped parallel structure; in addition, the fiber has good curling elasticity. Meanwhile, due to existence of twoingredients of polyster and chinlon, the fiber can show good dyeing performance and elastic effects.

Description

technical field [0001] The invention relates to the field of spinning, in particular to a preparation method of polyester nylon composite elastic fiber. Background technique [0002] The large thermal shrinkage difference between the two components of the side-by-side composite fibers is due to the different orientation and crystal structure of the two, while the crystallization and orientation of nylon and polyester are significantly different. By compounding the two fibers side by side, we can get Three-dimensional curly fiber with better elasticity. However, the necessary condition for the formation of side-by-side composite high-elastic fibers is good compatibility between the two components, and the compatibility between the amide group of nylon and the ester group of polyester is poor, and the peeling phenomenon of the side-by-side interface of the obtained composite fibers is more obvious . Therefore, improving the compatibility of polyester and nylon is an effectiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/14D01F8/12D01D5/32C08G63/78C08G63/688
CPCC08G63/6886C08G63/78D01D5/32D01F8/12D01F8/14
Inventor 刘婷
Owner ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD
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