Co-polyester melt and method for preparing same

A technology of copolyester and melt, which is applied in the field of chemical fiber, can solve the problems of poor dyeing rate, poor moisture absorption, breathability and moisture retention, and lack of rheological properties of polyester fiber fabrics, so as to achieve good moisture absorption and moisture conduction, good product quality, The effect of low production cost

Inactive Publication Date: 2013-12-25
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similar to other existing products, its copolyester melt has insufficient rheological properties, and the dyeing rate of the polyester fabric made is poor, dyeing is uneven, high temperature and high pressure dyeing is required, moisture absorption, breathability and moisture retention are poor, High production cost, single product function

Method used

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  • Co-polyester melt and method for preparing same

Examples

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Effect test

Embodiment 1

[0015] This embodiment provides a five-component monomer copolyester melt and a preparation method thereof. The production process and conditions are as follows:

[0016] See attached figure 1 , which is a process flow chart for preparing a copolyester melt in a four-pot polymerization system with five-component monomers provided in this example. Put the mass fraction of 70% terephthalic acid (PTA) and mass fraction of 30% ethylene glycol (EG) as the first and second components, and inject the mixed ingredients into the slurry tank to use terephthalic acid and ethylene glycol The total amount is 100%, add catalyst ethylene glycol antimony 0.04% and additives trimethyl phosphate 0.01%, cobalt acetate 0.011%, sodium acetate 0.005%, mix and stir, and pump into the first esterification kettle through the slurry crank pump The esterification reaction then automatically flows into the second esterification tank through the liquid level difference, while adding the third component p...

Embodiment 2

[0022] According to the technical process of Example 1, after the esterification reaction in the first esterification tank is completed, in the second esterification tank, the total amount of terephthalic acid and ethylene glycol is 100%, and the mass fraction of 1.0% is added in the second esterification tank. The three-component polyethylene glycol, the fourth component diethylene glycol with a mass fraction of 0.007%, and the ethylene glycol (EG) solution of the fifth component pentaerythritol with a mass fraction of 0.01%, and a mass fraction of 0.3% titanium dioxide ( TiO 2 ), carry out esterification reaction, and see Table 3 for the process parameters of the five-component monomer copolymerization to prepare the copolyester melt, and see Table 4 for related performance indicators.

[0023] Table 3 Synthesis process of five-component copolyester melt

[0024] Process parameters Esterification Ⅰ Esterification II Precondensation final polycondensation ...

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Abstract

The invention relates to a co-polyester melt and a method for preparing the co-polyester melt. Terephthalic acid and ethylene glycol are adopted as raw materials and a certain mass fraction of the third component of component polyethylene glycol, a certain mass fraction of the fourth component of diethylene glycol and a certain mass fraction of the fifth component of pentaerythritol are added to the raw materials to be copolymerized, and accordingly the co-polyester melt of the five-component monomers is obtained. The co-polyester melt has the advantages of being low in production cost, multifunctional, efficient and good in quality, and a fiber made from the co-polyester melt has the advantages of being easy to dye and level in dying, absorbing moisture, conducting moisture, being good in moisture retention and resistant to static electricity and the like.

Description

technical field [0001] The invention relates to a copolyester melt used for melt spinning and a preparation method thereof, belonging to the technical field of chemical fibers. Background technique [0002] At present, ordinary polyester fibers in the domestic and foreign markets are mainly polymerized with terephthalic acid and ethylene glycol as raw materials, and then directly spun from the melt or made into chips for high-speed spinning (POY) or spinning and drawing. One-step (FDY) technology route preparation. Chinese invention patent CN102965761A discloses a one-step hydrophilic polyester / high-shrinkage polyester blended yarn and its preparation method. Prepared by spinning, hydrophilic copolyester chips are composed of purified terephthalic acid, ethylene glycol, isophthalic acid glycol ester-5-sodium sulfonate, polyglycol, and other glycols, High-shrinkage copolyester chips are composed of purified terephthalic acid, ethylene glycol, and isophthalic acid. Similar ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/672C08G63/78D01F6/84
Inventor 王耀荣沈家康丁庆华陈明夏
Owner SUZHOU UNIV
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