Sea-island slice allowing low-alkaline splitting and production method of sea-island slice

A sea island and slicing technology, applied in the direction of single-component copolyester rayon, etc., can solve the problems of large caustic soda consumption, environmental damage, high cost, etc., and achieve the effects of ensuring quality, improving crystallization performance, and good hydrolysis performance

Inactive Publication Date: 2018-01-19
YICHANG ZHONGYING TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the present invention provides a low-alkali fiber-opened sea-island slice and its production method, which is used to solve the problem of conflicting water solubility and crystallization properties of the existing sea-island slice. The quality of the sea-island textiles can only be selected from sea-island slices with strong crystallization properties, so that the fiber opening process needs to consume a large amount of caustic soda, which is not only costly, but also causes serious damage to the environment.

Method used

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  • Sea-island slice allowing low-alkaline splitting and production method of sea-island slice

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take 55% of terephthalic acid, 24% of ethylene glycol and 7% of isophthalic acid according to the mass fraction ratio, mix them and pump them into the first esterification kettle, heat up to 255°C and keep 255±3°C for esterification reaction, the reaction In the process, the product of the first esterification tank enters the rectification tower for rectification, and a fraction is produced at the top of the rectification tower, and the esterification rate of the esterification reaction in the first esterification tank is calculated according to the mass of the fraction and the total mass of raw materials. When the esterification rate reaches 97.5%, the reaction is stopped, and the remaining reactants are pressed into the second esterification kettle with high-purity nitrogen containing less than 10 ppm of oxygen; 8% of isophthalic acid-5-sulfonate sodium is prepared into 40%wt Add the esterified solution into the second esterification tank, then take 5.98% of polyether ...

Embodiment 2

[0038] Take 56.5% of terephthalic acid, 28% of ethylene glycol and 6% of isophthalic acid according to the mass fraction ratio, mix them and pump them into the first esterification kettle, raise the temperature to 255°C and keep 255±3°C for esterification reaction. In the process, the product of the first esterification tank enters the rectification tower for rectification, and a fraction is produced at the top of the rectification tower, and the esterification rate of the esterification reaction in the first esterification tank is calculated according to the mass of the fraction and the total mass of raw materials. When the esterification rate reaches 97.5%, the reaction is stopped, and the remaining reactants are pressed into the second esterification kettle with high-purity nitrogen containing less than 10 ppm of oxygen; 4.98% of isophthalic acid-5-sodium sulfonate is prepared into 40%wt The esterification solution is added to the second esterification tank, then 4% of polye...

Embodiment 3

[0040]Take 58% of terephthalic acid, 30% of ethylene glycol and 5% of isophthalic acid according to the mass fraction ratio, mix them and pump them into the first esterification kettle, raise the temperature to 255°C and keep 255±3°C for esterification reaction. In the process, the product of the first esterification tank enters the rectification tower for rectification, and a fraction is produced at the top of the rectification tower, and the esterification rate of the esterification reaction in the first esterification tank is calculated according to the mass of the fraction and the total mass of raw materials. When the esterification rate reaches 97.5%, the reaction is stopped, and the remaining reactants are pressed into the second esterification kettle with high-purity nitrogen containing less than 10 ppm of oxygen; 2.78% of isophthalic acid-5-sodium sulfonate is prepared into 40%wt The esterification liquid is added to the second esterification tank, then 4.2% of polyethe...

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Abstract

The invention provides a sea-island slice allowing low-alkaline splitting. The sea-island slice comprises 55wt%-80wt% of terephthalic acid, 24wt%-55wt% of ethylene glycol, 5wt%-7wt% of isophthalic acid, 2.1wt%-11wt% of ternary monomer isophthalic acid-5-sodium sulfonate, 4wt%-8wt% of quaternary monomer polyether and 0.02wt% of antimonous oxide, wherein the molecular weight of polyether is 600-1,500. The water solubility and crystallization property of the polyester sea-island slice are combined together successfully, splitting can be performed at the low-alkaline concentration while the strength of prepared sea-island fiber is guaranteed, so that the cost is saved, and environmental damage is reduced.

Description

technical field [0001] The invention relates to the field of textile slicing, in particular to a pirate slicing capable of opening fibers under low-alkali conditions while maintaining good crystallization performance and a production method thereof. Background technique [0002] Sea-island fiber is a polymer dispersed in another polymer. The dispersed phase in the fiber cross-section is in the state of "island", while the matrix is ​​equivalent to "sea". From the cross-section of the fiber, it is a kind of composition in the form of fine And the scattered state is surrounded by another component, as if there are many islands in the sea. In the production process, it has the fineness of conventional fibers, but the "sea" component is dissolved with a solvent, and a bundle of superfine fiber bundles can be obtained, and many special fabrics can be obtained by utilizing the extremely fine fibrillation characteristics of sea-island fibers Style, this kind of fabric can be widel...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/688C08G63/672C08G63/78D01F6/84
Inventor 王海波欧阳显康王启胜赵晨阳赵建华郑祥燕邹炬邓云
Owner YICHANG ZHONGYING TECH DEV CO LTD
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