Porous PTT (polytrimethylene terephthalate) fiber FDY (fully drawn yarn) and preparation method thereof

A fiber and spinneret technology, applied in the field of PTT fibers, can solve the problems of uneven dyeing and poor mechanical properties of PTT fibers, and achieve the effects of improving dyeing performance, improving processing performance, and increasing the degree of diffusion

Active Publication Date: 2017-01-11
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 overcome the problems of uneven dyeing and poor mechanical properties of existing PTT fibers, realize large-scale production and spinning, and provide a porous PTT fiber FDY filament and its preparation method

Method used

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  • Porous PTT (polytrimethylene terephthalate) fiber FDY (fully drawn yarn) and preparation method thereof
  • Porous PTT (polytrimethylene terephthalate) fiber FDY (fully drawn yarn) and preparation method thereof
  • Porous PTT (polytrimethylene terephthalate) fiber FDY (fully drawn yarn) and preparation method thereof

Examples

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Effect test

Embodiment 1

[0060] A preparation method of modified PTT polyester, specifically comprising the following steps:

[0061] (1) Preparation of glycol terephthalate:

[0062] Put terephthalic acid and 2-pentyl-1,3 propanediol with a molar ratio of 1:1.3 into a slurry and add it to the reactor at a concentration of 50 wt%, and the addition amount is 0.3% of the weight of terephthalic acid. Under the catalysis of sulfuric acid, esterification reaction is carried out. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurized pressure is normal pressure and the temperature is 180°C. Time is the end point of the esterification reaction to obtain diol terephthalate;

[0063] (2) Preparation of 1,3-propylene glycol terephthalate:

[0064] After making terephthalic acid and 1,3-propanediol into a slurry, carry out esterification reaction. The esterification reaction is pressurized in a nitrogen atmosphere, the pressure is controlled at normal pressure, and the temperature...

Embodiment 2

[0071] The preparation process of the modified PTT polyester of embodiment 2 is the same as embodiment 1, wherein the main technical parameters are referring to table 1; After adding glycol terephthalate in step (3), stir and mix for 16 minutes. Be 0.011% catalyst tetrabutyl titanate of terephthalic acid weight and add under the effect of 0.02% stabilizing agent triphenyl phosphate of terephthalic acid weight, under the condition of negative pressure, start the stage of low vacuum stage For the polycondensation reaction, the pressure at this stage is steadily pumped from normal pressure to an absolute pressure of 490Pa, the temperature is controlled at 262°C, and the reaction time is 31 minutes; then continue to vacuumize and carry out the polycondensation reaction in the high vacuum stage to reduce the reaction pressure to an absolute pressure of 99Pa. The reaction temperature was controlled at 275° C., and the reaction time was 51 minutes to prepare the modified PTT polyester...

Embodiment 3

[0074] The preparation process of the modified PTT polyester of embodiment 3 is the same as embodiment 1, wherein the main technical parameters are referring to table 1; After adding glycol terephthalate in step (3), stir and mix for 16 minutes. Under the action of the catalyst tetrabutyl titanate of 0.03% of the weight of terephthalic acid and the stabilizing agent triphenyl phosphate of 0.02% of the weight of terephthalic acid, the low vacuum stage is started under the condition of negative pressure. For the polycondensation reaction, the pressure at this stage is steadily pumped from normal pressure to an absolute pressure of 498Pa, the temperature is controlled at 263°C, and the reaction time is 32 minutes; then continue to vacuumize and carry out the polycondensation reaction in the high vacuum stage to reduce the reaction pressure to an absolute pressure of 80Pa. The reaction temperature was controlled at 271° C., and the reaction time was 57 minutes to prepare the modifi...

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Abstract

The invention relates to porous PTT (polytrimethylene terephthalate) fiber FDY (fully drawn yarn) and a preparation method thereof. The porous PTT fiber FDY is prepared from modified PTT through spinning by a porous spinneret plate; spinneret holes in the porous spinneret plate are arranged elliptically, that is, the centers of the spinneret holes are located on concentric ellipses which are a series of ellipses, major axes of the ellipses are collinear, and minor axes of the ellipses are collinear. The porous PTT fiber FDY is prepared from the modified PTT through processing; a preparation method of the modified PTT comprises the following steps: terephthalic acid and 1,3-propanediol react to prepare 1,3-propanediol terephthalate, terephthalic acid and diol containing branched chains are added for a reaction, diol terephthalate is prepared and continuously subjected to a reaction, and modified PTT is obtained. The prepared fiber has excellent performance, the linear density deviation is lower than or equal to 0.5%, the breaking strength CV value is lower than or equal to 4.0%, the breaking elongation CV value is lower than or equal to 8.0%, and the yarn unevenness CV is lower than or equal to 2.0.

Description

technical field [0001] The invention belongs to the field of PTT fibers, and relates to a porous PTT fiber FDY filament and a preparation method thereof. Background technique [0002] Polypropylene terephthalate (PTT fiber) fiber has high breaking strength and elastic modulus, moderate resilience, excellent heat setting, good heat and light resistance, acid resistance, alkali resistance and corrosion resistance since its inception. A series of excellent properties, and the fabric has the advantages of anti-wrinkle, non-ironing, good crispness, etc., and is widely used in clothing, home textiles and other fields. [0003] PTT has better elasticity, dimensional stability and dyeability. At the same time, it has many excellent properties such as anti-ultraviolet, anti-internal stress, low water absorption, low static electricity, good biodegradability, and recyclability, so it is widely used in carpet industry, clothing materials, engineering plastics and other fields. With t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92C08G63/183D01D5/247D01D5/08D01D5/253
CPCC08G63/183D01D5/08D01D5/247D01D5/253D01F6/92
Inventor 范红卫王丽丽丁竹君张元华孙晓华
Owner JIANGSU HENGLI CHEM FIBER
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