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Preparation method for crossed special-shaped skin-core moisture absorption and removal fiber

A technology of skin-core fiber and wet fiber, which is applied in the field of preparation of cross-shaped skin-core moisture-absorbing and dehumidifying fibers, which can solve the problems of increasing the weight of clothes, stuffy and uncomfortable, hindering sweat evaporation and skin heat dissipation, etc., to increase the contact area and increase the specific surface area Effect

Active Publication Date: 2020-08-21
ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, after the fabrics made of the above-mentioned cotton-like polyester fibers absorb sweat, a large amount of water will remain on the surface of the fibers, which will not only increase the weight of the clothes, but also hinder the evaporation of sweat and the skin. The moisture on the surface or shallow layer of the fiber directly contacts the skin. After a lot of exercise, it will produce a clammy feeling, which makes people feel hot and uncomfortable.

Method used

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  • Preparation method for crossed special-shaped skin-core moisture absorption and removal fiber
  • Preparation method for crossed special-shaped skin-core moisture absorption and removal fiber

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preparation example Construction

[0040] A method for preparing a cross-shaped sheath-core moisture-absorbing and dehumidifying fiber, comprising the following steps:

[0041] 1) Use titanium series composite catalysts for terephthalic acid, ethylene glycol, the third monomer ethylene glycol isophthalate sulfonate, the fourth monomer polyethylene glycol, and environment-friendly polyester (applicant's prior The catalyst described in Example 1 in the application CN201811059731.8) is blended for esterification reaction. The reaction process conditions are: temperature 240-250°C, time 2-3h, pressure ≤ 0.3MPa, and obtain a prepolymer after esterification; then The polycondensation reaction is carried out at a vacuum degree of 0-100 Pa, the temperature is 270-290° C., and the time is 3-4 hours. After the reaction is completed, the material is discharged, dried, and pelletized to obtain a cotton-like polyester chip A. The molar ratio of the terephthalic acid, ethylene glycol and the third monomer ethylene glycol sul...

Embodiment 1

[0050] A method for preparing a cross-shaped sheath-core moisture-absorbing and dehumidifying fiber, comprising the following steps:

[0051] 1) Combine terephthalic acid (PTA), ethylene glycol (EG), the third monomer ethylene glycol sulfonate isophthalate (SIPE), the fourth monomer polyethylene glycol (PEG) and environmental protection A titanium-based composite catalyst for polyester-type polyester is put into the polyester reactor together, and the esterification reaction is carried out at 240 ° C and the pressure is lower than 0.3 MPa for 3 hours to obtain a prepolymer, wherein the molar ratio of PTA: EG: SIPE is 1: 1.3:0.03, the mass ratio of PEG to PTA is 0.01:1, the mass ratio of catalyst to PTA is 0.003%:1; then polycondensation reaction is carried out under a vacuum lower than 100Pa, the temperature is 270°C, and the time is 3h. The hydrophilic cotton-like polyester chip A is prepared after drying and pelletizing;

[0052] 2) Pass the polyvinylpyrrolidone of the cott...

Embodiment 2

[0057] A method for preparing a cross-shaped sheath-core moisture-absorbing and dehumidifying fiber, comprising the following steps:

[0058] 1) Combine terephthalic acid (PTA), ethylene glycol (EG), the third monomer ethylene glycol sulfonate isophthalate (SIPE), the fourth monomer polyethylene glycol (PEG) and environmental protection A titanium-based composite catalyst for polyester-type polyester is put into the polyester reactor together, and the esterification reaction is carried out at 240 ° C and the pressure is lower than 0.3 MPa for 3 hours to obtain a prepolymer, wherein the molar ratio of PTA: EG: SIPE is 1: 1.3:0.03, the mass ratio of PEG to PTA is 0.01:1, the mass ratio of catalyst to PTA is 0.003%:1; then polycondensation reaction is carried out under a vacuum lower than 100Pa, the temperature is 270°C, and the time is 3h. The hydrophilic cotton-like polyester chip A is prepared after drying and pelletizing;

[0059] 2) Pass the polyvinylpyrrolidone of the imit...

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Abstract

The invention relates to the field of chemical fiber, and discloses a preparation method for crossed special-shaped skin-core moisture absorption and removal fiber. The preparation method comprises the steps that (1) a polyester monomer, SIPE and polyethylene glycol serve as raw materials to obtain a cotton-like polyester chip A; (2) the cotton-like polyester chip A and a pore-forming agent are blended and fused to obtain a cotton-like polyester chip B; (3) nanosized high-water-absorption micro powder and conventional PET are made into hydrophilic polyester masterbatch; (4) the hydrophilic polyester masterbatch and a conventional PET chip serve as a core layer component, the cotton-like polyester chip B serves as a skin layer component, and spinning is conducted; and (5) alkali treatment is conducted. The fiber finally obtained through the preparation method has excellent moisture absorption performance and softness of traditional cotton-like polyester fiber and moreover can intelligently guide and remove moisture, and a person feels more comfortable during wearing and does not feels wet, cold and sultry after sweating.

Description

technical field [0001] The invention relates to the field of chemical fibers, in particular to a method for preparing a cross-shaped sheath-core moisture-absorbing and dehumidifying fiber. Background technique [0002] Polyester is a typical hydrophobic fiber with a moisture absorption rate of only about 0.4%. As a material for close-fitting clothing, it has poor wearing comfort. Cotton fiber is the most used natural fiber for clothing. Cotton fabric has excellent properties such as good hygroscopicity, soft hand feeling, hygienic and comfortable wearing, etc. However, pure cotton textiles also have shortcomings that are difficult to overcome, including poor elasticity, no wrinkle resistance, easy shrinkage, and acid resistance. and mold etc. [0003] Therefore, in combination with the advantages of polyester fibers and natural cotton fibers, it is one of the main directions to develop a cotton-like polyester fiber. At present, the preparation of polyester fibers is usuall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14D01F1/10C08G63/688C08G63/85C08F210/06C08F220/38
CPCD01F8/14D01F1/10C08G63/6886C08G63/85C08F210/06Y02P70/62
Inventor 杨冬雪王文林巧巧樊亚玲
Owner ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD
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