Method of controlling crimp shrinkage of fine-denier polyester by adjusting content of pentaerythritol

A technology of pentaerythritol and fine denier polyester is applied in the field of polyester to achieve the effects of improving stability, increasing strength and simplifying process changes

Active Publication Date: 2014-09-24
ZHEJIANG YINYU NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention proposes a method for controlling the crimp shrinkage of fine-denier polyester by adjusting the content of pentaerythritol, which solves the problem of adjusting and controlling the linear density of polyester filaments in the prior art

Method used

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  • Method of controlling crimp shrinkage of fine-denier polyester by adjusting content of pentaerythritol
  • Method of controlling crimp shrinkage of fine-denier polyester by adjusting content of pentaerythritol
  • Method of controlling crimp shrinkage of fine-denier polyester by adjusting content of pentaerythritol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] PER-PET copolymers can be prepared by the following process.

[0046] In this example, PER and commercially available PET chips were used as raw materials to carry out copolymerization in a polymerization tank to obtain a PER-PET copolymer. The mass ratio of PER to PET is 1:99, tetrabutyl titanate is used as a catalyst, and the dosage is 0.5% of the mass sum of PER and PET. During the polymerization, the reaction temperature is 280°C, the vacuum is strictly dehydrated, and the vacuum degree is less than 50Pa. The reaction time is 6h.

[0047] The PER content in the PER-PET copolymer obtained in this example is 1%, the number average molecular weight is 25500, the molecular weight distribution is 2.4, and the intrinsic viscosity is 0.53. It can be used as spinning masterbatch completely.

Embodiment 2

[0049] In this example, after in-line blending, the PER content in the PER-PET copolymer and pure PET mixture is 200ppm. The specific spinning process is shown in the table below:

[0050]

[0051] The total fineness of the polyester filament prepared by the above process is 74.9dtex, the tensile strength is 3.0cN / dtex, the elongation at break is 140%, and the monofilament linear density is 2.08dtex; The linear density of fiber monofilament is reduced to 0.50dtex, the strength is increased to 4.3cN / dtex, and the crimp shrinkage rate is 45%.

Embodiment 3

[0053] After online blending in this example, the PER content in the PER-PET copolymer and pure PET mixture is 90ppm. The specific spinning process is shown in the table below:

[0054]

[0055]

[0056] The total fineness of the polyester filament prepared by the above process is 61.2dtex, the tensile strength is 2.4cN / dtex, the elongation at break is 150%, and the monofilament linear density is 1.7dtex; The linear density of fiber monofilament is reduced to 1.04dtex, the strength is increased to 3.8cN / dtex, and the crimp shrinkage rate is 41%.

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Abstract

The invention relates to a method of controlling the crimp shrinkage of a fine-denier polyester by adjusting the content of pentaerythritol. The method is characterized by comprising the following steps: adjusting the irregularity of molecular chains of polyester fibers by means of a branching effect of the pentaerythritol to a molecular chain of PET (Polyethylene Terephthalate) so as to change the flexibility of the molecular chains of the fibers; and finally, controlling the crimp shrinkage of the fine-denier polyester. On one hand, the method provided by the invention can greatly increase the crimp shrinkage of polyester filament yarns (from 25-38% to 40-46.7%), and on the other hand, the method can adjusts the crimp shrinkage of the fibers according to the filament number of the fibers by means of adjusting the content of the pentaerythritol, so that the fibers with different filament numbers are close in crimp shrinkage under a same draw texturing process condition, and thus, technical changes caused by switching production are simplified and the stability of fiber production is improved.

Description

technical field [0001] The invention relates to the technical field of polyester, in particular to a method for controlling the crimp shrinkage of fine-denier polyester by adjusting the content of pentaerythritol. Background technique [0002] At present, polyester is one of the most widely used synthetic fibers with the largest output, mainly due to its many excellent properties such as high strength, good dimensional stability, good abrasion resistance, weather resistance and certain chemical resistance. Performance, its finished products are mostly used in the clothing industry. With the further improvement of people's requirements for the aesthetics and comfort of clothing, the elasticity and softness of clothing have increased the demand for high-elastic yarns for weaving close-fitting clothing. Therefore, this has made high-quality polyester fibers used in clothing, especially interlining , must have a certain curl shrinkage performance. [0003] However, during the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14D01D5/08C08G63/91D02G1/18
Inventor 凌秉文李刚丁海涛胡斌童勇
Owner ZHEJIANG YINYU NEW MATERIAL CO LTD
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