Polyester FDY hot melting fiber and preparation method thereof

A hot-melt fiber and polyester technology, applied in the field of polyester fiber, can solve the problems of reducing the effective content of catalyst, increasing the content of antimony in polyester, corrosion of polymerization equipment, etc., achieving the effects of easy control, reducing hydrogen sulfide, and improving quality

Active Publication Date: 2020-03-27
扬州富威尔复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Moreover, ethylene glycol, which is used as a raw material for polyester synthesis, contains dozens of ppm of hydrogen sulfide (residual in petrochemical or coal chemical industry). For a long time, hydrogen sulfide will cause corrosion to polymerization equipment and cause catalyst poisoning in the polymerization process. (Generation of antimony sulfide reduces the effective content of the catalyst); therefore, in order to make the polymerization proceed smoothly, the amount of catalyst used is usually increased, which affects the polyester from two aspects: one is that the antimony sulfide is yellow and will enter the In polyester, the color is affected (b value increases); the second is the increase of catalyst, which increases the content of antimony in polyester

Method used

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  • Polyester FDY hot melting fiber and preparation method thereof
  • Polyester FDY hot melting fiber and preparation method thereof
  • Polyester FDY hot melting fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A kind of preparation method of polyester FDY hot-melt fiber, concrete process is as follows:

[0045] (1) Esterification reaction;

[0046] After preparing terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol, calcium sulfonate isophthalate, macromolecular modulus modifier and zinc oxide into a slurry, the temperature is 235 ° C and the pressure is React under the nitrogen atmosphere of 0.25MPa, reach 90% of theoretical value to water distillation amount; Wherein, the mol ratio of terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol and calcium sulfonate isophthalate is 1:0.4:1.9:0.1:0.02; when the macromolecular modulus regulator is polybutylene adipate with a number average molecular weight of 550, its mass addition is 3% of the phthalic acid mass addition; The mass addition is 0.01% of the mass addition of phthalic acid;

[0047] (2) polycondensation reaction;

[0048] Add antimony trioxide and triphenyl phosphate to the syst...

Embodiment 2

[0062] A kind of preparation method of polyester FDY hot-melt fiber, concrete process is as follows:

[0063] (1) Esterification reaction;

[0064] After preparing terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol, zinc isophthalic acid sulfonate, macromolecular modulus regulator and zinc oxide into a slurry, the temperature is 230 ° C and the pressure is Reaction under the nitrogen atmosphere of 0.26MPa, reach 91% of theoretical value to water distillation amount; Wherein, the mol ratio of terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol and isophthalic acid zinc sulfonate is 1:0.5:1.8:0.2:0.01; when the macromolecular modulus regulator is polytrimethylene adipate with a number average molecular weight of 500, its mass addition is 4% of the phthalic acid mass addition; the mass addition of zinc oxide The amount is 0.012% of the mass addition of phthalic acid;

[0065] (2) polycondensation reaction;

[0066] Add ethylene glycol a...

Embodiment 3

[0071] A kind of preparation method of polyester FDY hot-melt fiber, concrete process is as follows:

[0072] (1) Esterification reaction;

[0073] After preparing terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol, magnesium sulfonate isophthalate, macromolecular modulus regulator and zinc oxide into a slurry, the temperature is 238 ° C and the pressure is React under the nitrogen atmosphere of 0.28MPa, reach 90% of theoretical value to water distillation amount; Wherein, the mol ratio of terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol and magnesium sulfonate isophthalate is 1:0.4:1.9:0.2:0.02; when the macromolecular modulus regulator is polyethylene adipate with a number average molecular weight of 600, its mass addition is 3% of the phthalic acid mass addition; The mass addition is 0.011% of the mass addition of phthalic acid;

[0074] (2) polycondensation reaction;

[0075] Add antimony acetate and trimethyl phosphite to the...

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Abstract

The invention relates to a polyester FDY hot melting fiber and a preparation method thereof. The polyester FDY hot melting fiber is prepared by taking phthalic acid (terephthalic acid and isophthalicacid), ethylene glycol, diethylene glycol, a glass transition temperature regulator (isophthalic acid sulfonate), a macromolecular modulus regulator (fatty acid ester or long chain diol having a carbon atom number greater than or equal to 5) and zinc oxide as reaction raw materials, and preparing low-melting-point polyester, and then carrying out spinning to obtain the polyester FDY hot melting fiber according to an FDY process. The prepared polyester FDY hot-melting fiber is made of the low-melting-point polyester, wherein the molecular chain of the low-melting-point polyester is composed ofa phthalic acid chain segment, an ethylene glycol chain segment, a diethylene glycol chain segment, a glass transition temperature regulator segment and a macromolecular modulus regulator chain segment. According to the preparation method of the polyester FDY hot melting fiber, the influence of hydrogen sulfide on the polyester hot-melting fiber in the polymerization process is reduced, the initial modulus of the fiber is reduced, meanwhile, fiber adhesion is avoided, and the method is simple, and the fiber application range is wide.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a polyester FDY hot-melt fiber and a preparation method thereof. Background technique [0002] Polyester fiber is durable, wrinkle-resistant and crisp, has good washability and wearability, and is widely used. It is one of the synthetic fibers with the largest demand and the fastest development speed. Low melting point polyester is a new type of modified polyester that lowers the melting point (100-210°C) by adding a variety of modifying components during the polymerization of ordinary polyesters to change the molecular structure of PET. Low-melting point polyester is widely used in the production of non-woven fabrics for clothing or electrical insulation non-woven fabrics. The fibers made from it are mixed in ordinary polyester fiber nets, and only need to be heated to its melting point to produce bonding. After cooling and solidification Strong bonding can improve the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/10C08G63/688C08G63/672C08K3/22
CPCC08G63/672C08G63/6886C08K3/22C08K2003/2296D01F1/10D01F6/92
Inventor 谭平乃符呈生
Owner 扬州富威尔复合材料有限公司
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