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High-strength PET polyester fiber and preparation method thereof

A polyester fiber, high-strength technology, applied in the direction of fiber chemical characteristics, cellulose/protein conjugated rayon, rayon manufacturing, etc., can solve fiber processing, increased difficulty in spinning, low strength of acetate fiber, and application and popularization restrictions, etc., to achieve the effect of increasing wear resistance, lowering softening temperature and high activity

Active Publication Date: 2021-08-24
上海茂腾针织有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a natural modified fiber, the biggest defect of acetate fiber is low fiber strength and poor durability.
The dry strength of acetate fiber is only 1.1-1.2eN / dtex, which increases the difficulty of later fiber processing and weaving, and limits the application and promotion.
In addition, the fiber is less durable

Method used

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  • High-strength PET polyester fiber and preparation method thereof

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preparation example Construction

[0022] A preparation method of high-strength PET polyester fiber, comprising the following steps:

[0023] PET is sliced ​​and crushed to a uniform powder PET with a size of 300 mesh 300 , preferably spinning PET polyester fiber, including but not limited to high viscosity oil bottle grade, matte grade polyester fiber;

[0024] Dopamine is dissolved into a solvent to form a solution, and PET is added to the solution 300 And add an organic weak base to adjust the pH to 8-12, heat and add polyethylene glycol, react until PET suspension powder appears, wash and dry to obtain PET Pre , the solvent is water, the mass ratio of water to dopamine is 60: (2-10), the organic weak base is triethylamine, ammonia water or a combination of the two, washed with water, absolute alcohol and dried in an oven ;

[0025] PET 300 、PET Pre After blending with acetate fiber, it is mixed with poly-Schiff base and reacted, and the reacted mixture is spun through a spinneret to obtain high-strengt...

Embodiment 1

[0029] PET is sliced ​​and crushed to a uniform powder PET with a size of 300 mesh 300 , preferably spun PET polyester fibers, including but not limited to high-viscosity oil bottle grade, matte grade polyester fibers, with a viscosity of 0.66dL / g, a water content of less than 200ppm, and a carboxyl-terminal content of 18-22mol / t.

[0030] Use 30mL water as solvent, heat to dissolve 1g of dopamine, and wait until the sample is fully melted. Add the 300-mesh PET powder PET prepared in advance respectively 30010g, organic weak base, such as triethylamine or ammonia water, adjust the pH to 8. Under full stirring, after heating in a water bath for 24 hours, add Polyethylene Glycol 1g, continue the reaction until PET suspension powder appears, evenly dark brown, and continue to stir for 24 hours. The solution was cooled to room temperature, filtered under reduced pressure, washed three times with water and absolute alcohol, and dried in an oven to obtain polydopamine-modified PET...

Embodiment 2

[0033] PET is sliced ​​and crushed to a uniform powder PET with a size of 300 mesh 300 , preferably spun PET polyester fibers, including but not limited to high-viscosity oil bottle grade, matte grade polyester fibers, with a viscosity of 0.66dL / g, a water content of less than 200ppm, and a carboxyl-terminal content of 18-22mol / t.

[0034] Use 30mL of water as a solvent, heat to dissolve 3g of dopamine, and wait until the sample is fully melted. Add the 300-mesh PET powder PET prepared in advance respectively 300 10g, organic weak base, such as triethylamine or ammonia water, adjust the pH to 10. Under sufficient stirring, after heating in a water bath for 24 hours, add polyethylene glycol 1g, continue the reaction until PET suspension powder appears, evenly in dark brown, and continue to stir for 24 hours. The solution was cooled to room temperature, filtered under reduced pressure, washed three times with water and absolute alcohol, and dried in an oven to obtain polydopam...

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Abstract

The invention discloses high-strength PET polyester fiber and a preparation method thereof. The preparation method comprises the following steps of preparing PET300 based on solid PET; adding PET300 and polyethylene glycol into a dopamine solution to prepare PETPre; and after PET300, PETPre and cellulose acetate fiber are blended, enabling a mixture and poly-bis-Schiff base to be subjected to a mixed reaction, so that the high-strength PET polyester fiber is obtained. PET can be modified through dopamine, the poly-bis-Schiff base and the cellulose acetate fiber, the addition amount of auxiliaries is small, the abrasion resistance is improved through environment-friendly dopamine, burrs are effectively reduced, the melt spinning technology is not changed, the production cost is basically not increased, and the very important application value is achieved.

Description

technical field [0001] The invention relates to fiber modification, in particular to a high-strength PET polyester fiber and a preparation method thereof. Background technique [0002] PET polyester fiber, commonly known as "polyester". It is the largest variety of synthetic fibers at present. As a textile fabric, polyester fiber has the advantages of good wrinkle resistance and shape retention, as well as high strength and elastic recovery ability. Therefore, when this fiber is applied to textile fibers, it is durable, wrinkle-resistant, non-ironing, and non-sticky. Therefore, it is favored by consumers. [0003] However, compared with cellulose fibers such as natural cotton, when PET polyester fiber (polyester) is used as a fabric, the hygroscopicity of the polyester cloth is poor, so the polyester clothing will have a hot feeling when worn, is easily charged with static electricity, and is infected with dust, which affects the appearance and comfort. In addition, PET p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14D01F8/02D01F1/10
CPCD01F8/14D01F8/02D01F1/10
Inventor 林资原
Owner 上海茂腾针织有限公司
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