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Low-content organic volatile low-melting-point polyester fiber and preparation method thereof

A technology of organic volatiles and low-melting polyester, which is applied in the field of polyester fibers, can solve problems such as side reactions, b value increase, and catalyst addition, and achieve the effects of weakening influence, increasing glass transition temperature, and avoiding adhesion

Active Publication Date: 2020-04-03
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 as a raw material for polyester synthesis contains tens 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 ( generate antimony sulfide, which 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 polyester In the ester, the color is affected (the b value is increased); the second is the increase of the catalyst, which increases the content of antimony in the polyester
In addition, a series of side reactions will occur during the esterification and polycondensation reaction of low-melting polyester, resulting in many by-products, among which crotonaldehyde and acetaldehyde are the most influential, both of which will cause physical symptoms
This has an adverse effect on the application of low-melting point polyester, especially limiting its application in automobiles and closed environments; and acrolein and acetaldehyde, as by-products of the polymerization reaction, cannot be completely eliminated in the polymerization

Method used

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  • Low-content organic volatile low-melting-point polyester fiber and preparation method thereof
  • Low-content organic volatile low-melting-point polyester fiber and preparation method thereof
  • Low-content organic volatile low-melting-point polyester fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A kind of preparation method of low content organic volatile matter low melting point polyester fiber, its process is as follows:

[0044] (1) Esterification reaction;

[0045] After preparing terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol, calcium sulfonate isophthalate, 1,4-butanediol and zinc oxide into slurry, at a temperature of 190°C and a pressure of Under the nitrogen atmosphere of 0.95KPa, react until the amount of water distilled reaches 90% of the theoretical value; among them, terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol, calcium sulfonate isophthalate and 1, The molar ratio of 4-butanediol is 1:0.3:0.8:0.09:0.01:1.0; the mass addition of zinc oxide is the mass addition of phthalic acid (that is, the mass addition of terephthalic acid and isophthalic acid) and 0.01% of ).

[0046] (2) polycondensation reaction;

[0047] Add ethylene glycol antimony and triphenyl phosphate to the system of step (1), react...

Embodiment 2

[0061] A kind of preparation method of low content organic volatile matter low melting point polyester fiber, its process is as follows:

[0062] (1) Esterification reaction;

[0063] After preparing terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol, calcium sulfonate isophthalate, 1,4-butanediol and zinc oxide into slurry, at a temperature of 180°C and a pressure of Under the nitrogen atmosphere of 0.95KPa, react until the amount of water distilled reaches 91% of the theoretical value; among them, terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol, calcium sulfonate isophthalate and 1, The molar ratio of 4-butanediol is 1:0.4:0.9:0.11:0.02:11; the mass addition of zinc oxide is 0.012% of the mass addition of phthalic acid.

[0064] (2) polycondensation reaction;

[0065] Add ethylene glycol antimony and triphenyl phosphate to the system of step (1), react at a temperature of 260°C and a pressure of 460Pa for 35 minutes, and then re...

Embodiment 3

[0070] A kind of preparation method of low content organic volatile matter low melting point polyester fiber, its process is as follows:

[0071] (1) Esterification reaction;

[0072] After preparing terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol, calcium sulfonate isophthalate, 1,4-butanediol and zinc oxide into slurry, at a temperature of 185°C and a pressure of Under the nitrogen atmosphere of 0.98KPa, react until the amount of water distilled reaches 90% of the theoretical value; wherein, terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol, calcium sulfonate isophthalate and 1, The molar ratio of 4-butanediol is 1:0.3:0.9:0.10:0.01:1.0; the mass addition of zinc oxide is 0.011% of the mass addition of phthalic acid.

[0073] (2) polycondensation reaction;

[0074] Add ethylene glycol antimony and triphenyl phosphate to the system of step (1), react at a temperature of 263°C and a pressure of 480Pa for 35 minutes, and then reac...

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Abstract

The invention relates to a low-content organic volatile low-melting-point polyester fiber and a preparation method thereof. The preparation method comprises the steps of taking terephthalic acid, phthalic acid, ethylene glycol, diethylene glycol, isophthalic acid sulfonate and 1, 4-butanediol as raw materials to prepare low-content organic volatile low-melting-point polyester, and then taking theprepared polyester as a sheath layer material and taking PET as a core layer material to prepare the low-content organic volatile low-melting-point polyester fiber through sheath-core composite spinning (a metal sand material in an assembly is Ni); and adding zinc oxide in an esterification reaction stage. The fiber has a sheath-core composite structure, and the sheath layer material is the low-content organic volatile low-melting-point polyester (a molecular chain is composed of a phthalic acid chain segment, an ethylene glycol chain segment, a diethylene glycol chain segment, an isophthalicacid sulfonate chain segment and a 1, 4-butanediol chain segment), and the core layer material is PET; and the total content of acetaldehyde and butenal in the fiber is less than 0.5 ppm. The method reduces the influence of organic volatile on fibers and avoids the problem of fiber adhesion.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a polyester fiber with low content of organic volatiles and low melting point 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 (melting point at 100-210°C) by adding a variety of modifying components during the polymerization of ordinary polyester 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. Aft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14D01F1/10D01D5/34C08G63/688C08K3/22
CPCC08G63/6886C08K3/22C08K2003/2296D01D5/34D01F1/10D01F8/14
Inventor 朱兴荣杨诚
Owner 扬州富威尔复合材料有限公司
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