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Superfine polyester low elastic yarn and preparation method thereof

A technology of ultra-fine polyester and low elastic yarn, which is applied in the direction of single-component copolyester rayon, fiber processing, textile and paper making, etc. The effect of quality improvement

Active Publication Date: 2020-02-21
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a one-step spinning elastic composite yarn with low fineness and its Preparation

Method used

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  • Superfine polyester low elastic yarn and preparation method thereof
  • Superfine polyester low elastic yarn and preparation method thereof
  • Superfine polyester low elastic yarn and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] A preparation method of superfine polyester low elastic yarn, the specific steps are as follows:

[0094] (1) Preparation of modified polyester:

[0095] (a) Esterification reaction: terephthalic acid, ethylene glycol and 2-ethyl-2-methyl-1,3-propanediol in a molar ratio of 1:1.2:0.03 are made into a slurry, and antimony trioxide is added , titanium dioxide and triphenyl phosphate are mixed evenly, and the esterification reaction is carried out under pressure in a nitrogen atmosphere. The pressurized pressure is normal pressure, and the temperature of the esterification reaction is 250°C. 90% of the value is the end point of the esterification reaction, wherein the addition of antimony trioxide is 0.01% of the weight of terephthalic acid, the addition of titanium dioxide is 0.20% of the weight of terephthalic acid, and the addition of triphenyl phosphate It is 0.05% of the weight of terephthalic acid, wherein the structural formula of 2-ethyl-2-methyl-1,3-propanediol i...

Embodiment 2

[0103] A preparation method of superfine polyester low elastic yarn, the specific steps are as follows:

[0104] (1) Preparation of modified polyester:

[0105] (a) Esterification reaction; prepare terephthalic acid, ethylene glycol and 2,2-diethyl-1,3-propanediol in a molar ratio of 1:1.3:0.04 into a slurry, add ethylene glycol antimony, titanium dioxide After mixing evenly with trimethyl phosphate, carry out the esterification reaction under pressure in a nitrogen atmosphere. The pressurized pressure is normal pressure, and the temperature of the esterification reaction is 260°C. 91% is the end point of the esterification reaction, wherein the addition of ethylene glycol antimony is 0.02% of the weight of terephthalic acid, the addition of titanium dioxide is 0.21% of the weight of terephthalic acid, and the addition of trimethyl phosphate is 0.02% of the weight of terephthalic acid. 0.03% by weight of phthalic acid, wherein the structural formula of 2,2-diethyl-1,3-propane...

Embodiment 3

[0113] A preparation method of superfine polyester low elastic yarn, the specific steps are as follows:

[0114] (1) Preparation of modified polyester:

[0115] (a) Esterification reaction: terephthalic acid, ethylene glycol, and 2-butyl-2-ethyl-1,3-propanediol in a molar ratio of 1:1.4:0.05 are made into a slurry, and antimony acetate and titanium dioxide are added After mixing evenly with trimethyl phosphite, carry out esterification reaction under pressure in a nitrogen atmosphere. 92% is the end point of the esterification reaction, wherein the addition of antimony acetate is 0.03% of the weight of terephthalic acid, the addition of titanium dioxide is 0.23% of the weight of terephthalic acid, and the addition of trimethyl phosphite is 0.03% of the weight of terephthalic acid. 0.01% by weight of phthalic acid, wherein the structural formula of 2-butyl-2-ethyl-1,3-propanediol is as follows:

[0116]

[0117] (b) polycondensation reaction; after the esterification react...

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Abstract

The invention relates to a superfine dacron low stretch yarn and a preparation method thereof. Modified polyester fusant is subjected to metering, extrusion, cooling, oiling and winding to prepare POYyarns; the POY yarns are subjected to yarn guide tube passing, networking, heating stretching, false twisting, heat setting and winding formation to prepare DTY yarns, i.e., the superfine dacron lowstretch yarn is obtained. During cooling, the longitudinal height is kept unchanged; the cross section area of a slow cooling chamber is increased; meanwhile, the slow cooling chamber maintains the plate surface temperature of a spinneret plate in a heat insulation mode; an oil agent for oiling contains crown ether; the content of the crown ether is 67.30 to 85.58 weight percent; the dihydric alcohol chain segment with branched chain is introduced into modified polyester; the prepared superfine dacron low stretch yarn has the filament number being smaller than 0.3dtex; the crimp shrinkage is 8.0+ / -1.0 percent; the crimp stability is greater than or equal to 75 percent. The method is simple and reasonable; the prepared superfine dacron low stretch yarn has the advantage of low fiber number.

Description

technical field [0001] The invention belongs to the field of fiber preparation, and relates to a superfine polyester low elastic yarn and a preparation method thereof. Background technique [0002] Since the appearance of polyethylene terephthalate (PET) fiber, it has developed rapidly because of its excellent performance, and its output has become the crown of synthetic fiber in the world. Polyester fiber has a series of excellent properties such as high breaking strength, high elastic modulus, moderate resilience, excellent heat setting performance, good heat resistance and light resistance, acid resistance, alkali resistance and corrosion resistance, and the fabric prepared from it has wrinkle resistance. And crispness and other advantages, so polyester fiber is widely used in clothing and home textiles and other fields. [0003] However, during the polycondensation reaction of synthesizing ethylene terephthalate, especially when producing linear high polymers, linear an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/84C08G63/183D06M13/11D06M13/224D06M15/53D06M13/02D06M13/292D06M13/256D06M101/32
CPCC08G63/183D01F6/84D06M13/02D06M13/11D06M13/224D06M13/256D06M13/292D06M15/53D06M2101/32
Inventor 沈建根袁正平张学东马文平王锋宾王建根
Owner JIANGSU HENGLI CHEM FIBER
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