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Self-crinkling composite fiber and producing method thereof

A composite fiber, selected technology, applied in the direction of conjugated synthetic polymer man-made filaments, etc., can solve the problems of high inherent viscosity of polymers, poor fluidity, and high polymer melt viscosity, and achieve slight buckling phenomenon without affecting spinning. processing effect

Active Publication Date: 2006-05-17
SHINKONG SYNTHETIC FIBERS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inherent viscosity of the polymer used in the method disclosed in the above patent bulletins is too high, and in the spinning process, the melt viscosity of the polymer is too high, the fluidity is poor, and the spinning process is difficult

Method used

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  • Self-crinkling composite fiber and producing method thereof
  • Self-crinkling composite fiber and producing method thereof
  • Self-crinkling composite fiber and producing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0037] Examples 1-5, Comparative Examples 1-4

[0038] PTT and PBT with different intrinsic viscosities are melt-extruded and spun at a weight ratio of 50:50, using a 24-hole spinning head, and the spinning temperature is 260 ° C. The filaments are cooled, solidified and oiled, and then Take up at a speed of 3000m / min. After an extension heat treatment with an extension ratio of 1.6 and a temperature of 80°C, a 100 d / twenty four f (that is, the denier number is 100, and there are 24 single fibers) crimped composite fiber. The degree of crimp, crimp appearance, and spinning properties of the conjugated fibers are listed in Table 1.

[0039]

No.

Intrinsic viscosity (dL / g)

ΔIV

(dL / g)

Curl

(CI)(%)

Appearance crimp

spinning special

sex

PTT

PBT

Reality

Shi

example

1

1.10

0.6

0.5

85.0

◎ *

○ *

2

...

Embodiment 6

[0044] Use PTT with an intrinsic viscosity of 0.90dL / g and PBT with an intrinsic viscosity of 0.60dL / g, the weight ratio of the two is 50:50, use a 24-hole spinning head, and melt-spin at a spinning temperature of 260°C. The strip is cooled, solidified and oiled, stretched at a ratio of 1.5, stretched at a setting temperature of 140°C, and spun directly at a speed of 4500m / min to obtain 75 d / twenty four f (that is, the denier number is 75, and there are 24 single fibers) crimped composite fiber has an excellent three-dimensional crimped appearance, and the crimp CI=45.

Embodiment 7

[0046] The intrinsic viscosity of PTT is 0.90dL / g, the intrinsic viscosity of PBT is 0.60dL / g, and the weight compound ratio of the two is 50:50. Using a 24-hole spinning head, melt spinning at a spinning temperature of 260°C, the silk The strips are cooled, solidified and oiled, and coiled at a speed of 3000m / min. After false twist processing with 1.6 elongation ratio, 75 d / twenty four f (That is, the denier number is 75, and there are 24 single fibers) crimped composite fiber, its appearance has an excellent three-dimensional crimped shape, and the crimp CI=65.

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Abstract

The present invention relates to a composite polyester elastic fibre and its production method said method includes the following steps: using two polymer components, namely polytrimethylene terephthalate (PTT) and polybutylene terephthalate (PBT), adopting side-by-side composite mode to make spinning, making extension heat treatment so as to obtain the invented composite fibre, in which the intrinsic viscosity of PTT is 0.80 dL / g to 1.20 dL / g, and the intrinsic viscosity of PBT is 0.58 dL / g to 0.84 dL / g, the intrinsic viscosity difference value (delta IV) of said two polymers is greater than or equal to 0.15 dL / g. The weight ratio of PTT and PBT is 30:70 to 70:30, and the crimp index of said composite fibre is up to above 40.

Description

technical field [0001] The invention relates to a spontaneous crimping composite fiber prepared by melt spinning polytrimethylene terephthalate (PTT) and polybutylene terephthalate (PBT) and a manufacturing method thereof. Background technique [0002] Fabrics with stretch elasticity have always been loved by people. In the early days, people used natural rubber to produce stretch fabrics, but then elastic fibers gradually replaced natural rubber. [0003] As people have higher and higher requirements for the comfort of clothing, stretchable elastic fibers are widely used in various fabrics because they can fully show the natural curves of the human body, and can increase aesthetics, functionality, and popularity. On, such as swimwear, ski suits, rhythm suits, sportswear, tights, stockings, etc. The elastic fiber industry has developed rapidly in recent years, and the demand for elastic fibers in the market is very large. The spontaneous crimping of composite fibers is mai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14C08L67/07
Inventor 吴国忠
Owner SHINKONG SYNTHETIC FIBERS
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