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Melt spinning method of low-melting-point polyester FDY filaments

A melt-spinning, low-melting-point technology, applied in the field of polyester FDY filament processing, can solve the problems of polyester FDY filaments with insufficient hydrophilicity and unstable structure, so as to improve hydrophilicity, improve physical properties, and promote crystallization Effect

Pending Publication Date: 2021-06-08
福建沃凯丝化纤有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a method for melt spinning polyester FDY filaments with a low melting point, mainly to solve the problem that the polyester FDY filaments prepared by the existing methods are not good enough in hydrophilicity, stable enough in structure, and unable to meet question of people's demands

Method used

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  • Melt spinning method of low-melting-point polyester FDY filaments
  • Melt spinning method of low-melting-point polyester FDY filaments

Examples

Experimental program
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Effect test

Embodiment 1

[0033] refer to figure 1 , a kind of melt-spinning method of low melting point polyester FDY filament, comprises the following steps:

[0034] S1: preparing slurry, adding a mixture of terephthalic acid and isophthalic acid and a mixture of succinic acid and glutaric acid into the reactor, and then mixing to prepare slurry;

[0035] S2: The first esterification, adding the prepared slurry and compounding additives to the esterification reactor for the first esterification reaction to obtain product A. The compounding additives in S2 are one or more of organotin and lead salts kind;

[0036] S3: Esterify again, add polyhydric alcohol to product A, carry out the second esterification reaction, obtain product B;

[0037] S4: Polycondensation reaction, adding the obtained product B into a polycondensation reactor for polycondensation reaction, and then obtaining a low melting point polyester melt;

[0038] S5: as-spun fibers, distributing the low-melting-point polyester melt to...

Embodiment 2

[0045] refer to figure 1 , a kind of melt-spinning method of low melting point polyester FDY filament, comprises the following steps:

[0046] S1: preparing slurry, adding a mixture of terephthalic acid and isophthalic acid and a mixture of succinic acid and glutaric acid into the reactor, and then mixing to prepare slurry;

[0047] S2: The first esterification, adding the prepared slurry and compounding additives to the esterification reactor for the first esterification reaction to obtain product A. The compounding additives in S2 are one or more of organotin and lead salts kind;

[0048] S3: Esterify again, add polyhydric alcohol to product A, carry out the second esterification reaction, obtain product B;

[0049] S4: Polycondensation reaction, adding the obtained product B into a polycondensation reactor for polycondensation reaction, and then obtaining a low melting point polyester melt;

[0050] S5: as-spun fibers, distributing the low-melting-point polyester melt to e...

Embodiment 3

[0057] refer to figure 1 , a kind of melt-spinning method of low melting point polyester FDY filament, comprises the following steps:

[0058] S1: preparing slurry, adding a mixture of terephthalic acid and isophthalic acid and a mixture of succinic acid and glutaric acid into the reactor, and then mixing to prepare slurry;

[0059] S2: The first esterification, adding the prepared slurry and compounding additives to the esterification reactor for the first esterification reaction to obtain product A. The compounding additives in S2 are one or more of organotin and lead salts kind;

[0060] S3: Esterify again, add polyhydric alcohol to product A, carry out the second esterification reaction, obtain product B;

[0061] S4: Polycondensation reaction, adding the obtained product B into a polycondensation reactor for polycondensation reaction, and then obtaining a low melting point polyester melt;

[0062] S5: as-spun fibers, distributing the low-melting-point polyester melt to...

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Abstract

The invention relates to the technical field of polyester FDY filament processing, and discloses a melt spinning method of low-melting-point polyester FDY filaments. The method includes the following steps: S1, preparing slurry: adding a mixture of terephthalic acid and isophthalic acid and a mixture of succinic acid and glutaric acid into a reaction kettle, and then mixing to prepare the slurry; S2, first esterification: adding the prepared slurry and a compound additive into an esterification reaction kettle for carrying out a first esterification reaction to obtain a product A, and the compound additive in S2 is one or more of organic tin and lead salts; S3, re-esterification: adding polyol into the product A, and carrying out a second esterification reaction to obtain a product B; and S4, carrying out condensation polymerization. A hydrophilic structure which has a hydrophilic function and a water component conduction function is formed in the polymer, the hydrophilic performance of polyester is greatly improved, the crystallinity of PET melt and fibers is further improved by applying an extra controllable magnetic field, and thus the physical performance of the fibers is improved.

Description

technical field [0001] The invention relates to the technical field of processing polyester FDY filaments, in particular to a melt spinning method for polyester FDY filaments with a low melting point. Background technique [0002] Polyester fabrics are closely related to people's lives and are closely connected. They are used for clothing, bedding, decorations, bags, tents, etc. Polyester FDY (full name Fully Drawn Yarn, fully drawn yarn) introduces stretching during the spinning process, and can obtain winding yarn with high degree of orientation and medium crystallinity. Polyester FDY fabric feels smooth and soft, and is often used to weave imitation silk fabrics. [0003] The existing polyester FDY filament cannot meet people's daily needs to a certain extent, so it needs to be improved. In many melt spinning processes, a controllable magnetic field can be applied to improve the crystallization of the melt. The crystal form of the fiber is more stable, that is to say, b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/84C08G63/20D01D5/08D01D5/088D01D7/00D01D10/02
CPCD01F6/84C08G63/20D01D5/08D01D5/088D01D7/00D01D10/02
Inventor 曾宪耀王银凤
Owner 福建沃凯丝化纤有限公司
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