A kind of copolyester melt direct spinning pre-oriented yarn and preparation method thereof

A pre-oriented yarn, melt direct spinning technology, applied in the direction of single-component copolyester rayon, melt spinning, filament/thread forming, etc. type polyester composite fibers, etc., to achieve a fine three-dimensional multi-layer structure and improve the effect of crystallinity

Active Publication Date: 2015-09-23
SUZHOU SUZHEN BIOLOGICAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the low crystallinity of polyester pre-oriented yarns and high shrinkage on boiling (usually 50% to 60%), under the action of heat, the different shrinkage composite fibers will have different shrinkage differences and porosity between fibers. Therefore, it is impossible to prepare low-shrinkage polyester composite fibers with micro-loops and voids and capillary structure characteristics; secondly, the surface of the fabric made of polyester different-shrinkage composite fibers presents white spots and uneven dyeing. Defects such as poor moisture absorption and moisture retention

Method used

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  • A kind of copolyester melt direct spinning pre-oriented yarn and preparation method thereof
  • A kind of copolyester melt direct spinning pre-oriented yarn and preparation method thereof

Examples

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Effect test

Embodiment 1

[0025] This embodiment provides a kind of 47dtex / 48f copolyester melt direct spinning to prepare low-shrinkage type pre-oriented yarn, and its production process and conditions are as follows:

[0026] 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 polyethylene glycol with a mass fraction of 1.0%, the fourth component diethylene glycol with a mass fraction of 0.007%, and a mass fraction of 0.01%...

Embodiment 2

[0031] This embodiment provides a kind of 178dtex / 36f copolyester melt direct spinning to prepare low-shrinkage type pre-oriented yarn, its technological process is the same as embodiment 1, and production process and condition are as follows:

[0032] In the four-pot copolymerization process, the mass fractions were respectively added: terephthalic acid (PTA) 70%, ethylene glycol (EG) 30%, the third component polyethylene glycol 1.0%, and the fourth component diethylene glycol 0.007 % and the fifth component of pentaerythritol 0.05% of the five-component monomers were copolymerized to obtain a copolyester melt.

[0033] The indicators that will meet the requirements of the spinning process are: a copolyester melt with an intrinsic viscosity of 0.631dl / g, a melting point of 255°C, and a carboxyl-terminated content of 29mol / t, which is boosted and transported to the spinning box through a melt pipeline and a booster pump spinning, the process conditions are: spinning temperatur...

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Abstract

The invention relates to a pre-oriented yarn made from a copolyester melt through direct spinning, and a preparation method of the pre-oriented yarn. According to the invention, the copolyester melt, which is made from copolymerization of five components including terephthalic acid, ethylene glycol, poly ethylene glycol, diethylene glycol and pentaerythritol, is subject to spinning to obtain a low shrinkage type copolyester pre-oriented yarn, of which the specification is 47dtex-178dtex / 36f-72f, the breaking strength is 2.10 cN / dtex-2.80 cN / dtex, the elongation at break is 65%-85%, and the boiling water shrinkage is 30%-40%; the low shrinkage type copolyester pre-oriented yarn and an FDY are combined to prepared the low differential shrinkage type composite fiber; under thermal action, micro wavy shapes, micro yarn rings, and capillary structures are formed among the low differential shrinkage type composite fibers, so that the prepared low differential shrinkage type composite fiber and a fabric have the characteristics of relatively good micro three-dimensional structure, and good fluffiness, dyeing uniformity, moisture absorption property, moisture preservation property and air permeability.

Description

technical field [0001] The invention relates to the field of differential fiber preparation, in particular to a method for preparing copolyester melt direct-spun low-shrinkage pre-oriented yarns. Background technique [0002] Low-shrinkage pre-oriented yarns can be used as low-shrinkage core yarns to prepare low-shrinkage composite fibers, that is, low-shrinkage pre-oriented yarns with a shrinkage rate of 30% to 40% are combined with ordinary shrinkage fibers to produce Low differential shrinkage composite fiber, after heat treatment, can produce tiny loops and gaps between low differential shrinkage composite fibers, capillary suction core structure characteristics, and form a fine three-dimensional multi-layer structure, so that it has good resilience and Moisture absorption and breathability. [0003] At present, the polyester pre-oriented yarn (POY) obtained at a high-speed spinning speed of 3100m / min to 3600m / min is usually used in China as the core yarn for preparing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/84C08G63/672D01D5/08D01D5/088D01D10/02
Inventor 管新海席丽媛李海涛
Owner SUZHOU SUZHEN BIOLOGICAL ENG CO LTD
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