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8-shaped pet/PTT hollow fibre and preparing method thereof

A fiber and hollow technology, applied in the field of "8"-shaped PET/PTT hollow fiber and its preparation, can solve the problems of deterioration of tensile properties, poor spinning, unstable hollow fiber, etc., and achieve the effect of broad application prospects

Inactive Publication Date: 2008-07-09
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, although there have been many researches on hollow polyester fibers, they are all based on a single type of polyester, so they are limited in performance to a large extent.
In general, hollow fibers are rather unstable and prone to crushing
The hollow crimped fiber of a single polyester is prepared by asymmetrical cooling with surrounding air blowing, in which the air blowing speed has a great influence on the fiber forming. In order to obtain the primary fiber with better potential crimp, the wind speed is increased to strengthen the asymmetric structure of the fiber cross section. However, if the wind speed is too high, it will cause the filament to vibrate, the filament to be unsmooth, the pre-orientation degree of the original filament to be large, and the tensile performance to deteriorate.
In the post-stretching process, there is also the problem that the crimp and stretch properties cannot be taken into account at the same time
Although T400 (PET / PTT composite fiber) produced by Invista Corporation of the United States also has natural three-dimensional curls, it is not as good as hollow fiber in terms of moisture absorption, perspiration and warmth retention.

Method used

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  • 8-shaped pet/PTT hollow fibre and preparing method thereof
  • 8-shaped pet/PTT hollow fibre and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Production example of "8" shaped PET / PTT hollow staple fiber

[0027] Raw material composition: PET chips (intrinsic viscosity 0.65 dL / g, melting point 260-265°C)

[0028] PTT chip (intrinsic viscosity 0.92 dL / g, melting point 228~233℃)

[0029] Pre-crystallization of PET polyester chips (temperature 170°C, time 3h, drying medium hot air, dew point -70°C) and then drying of two kinds of polyester chips (PET chip drying temperature is 175°C, PTT is 165 °C), according to the set compounding ratio (50:50), they are respectively fed into the twin-screw extruder for melt extrusion, and the melts of the two components use two sets of metering pumps respectively, and enter the composite spinning through the melt pipe. The components are sprayed out from the spinneret, and then cooled by the surrounding air, oiled, wound, dropped into the barrel, bundled, stretched, tensioned and heat-set, oiled, crimped, and cut. Some of the specific spinning process parameters are shown in T...

Embodiment 2

[0034] Production example of "8" shaped PET / PTT hollow DTY long fiber

[0035] Raw material composition: PET chip (intrinsic viscosity 0.65dL / g, melting point 260~265℃)

[0036] PTT chip (intrinsic viscosity 0.92dL / g, melting point 228~233℃)

[0037] Pre-crystallization of PET polyester chips (temperature 170°C, time 3h, drying medium hot air, dew point -70°C) and then drying of two kinds of polyester chips (PET chip drying temperature is 175°C, PTT is 165 °C), according to the set compounding ratio (30:70), they are respectively fed into the twin-screw extruder for melt extrusion, and the melts of the two components respectively use two sets of metering pumps to enter the composite spinning through the melt pipe. The components are sprayed out from the spinneret, then cooled by the surrounding air, oiled, wound, and dropped into the barrel to obtain POY yarns, and finally deformed by the first hot box, false twister, shaped by the second hot box, and oiled and wound. Part o...

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Abstract

The invention relates to '8'-shaped PET / PTT hollow fiber and a process for preparation. The fiber is prepared by composite spinning which is obtained through melting polyethylene glycol terephthalate PET and polyytrimethylene terephthalate PTT slice. The process for preparation comprises drying PET and PTT polyester slice, entering into a composite spinning assembly through a twin-screw extruder in parallel, carrying out melt spinning, cooling through cross air blow, oiling on an oil tanker, drafting by two channels, coiling, finally obtaining '8'-shaped PET / PTT hollow fiber. The fiber fully exerts the excellent property of PTT and PET fiber, which is thermal insulating, highly moisture absorbable and breathable, soft and touching, since PTT and PET fiber have different shrinkage ratio and have the potential function of coiling property, the product has greatly wide application prospect in the field of clothing face fabric and various filling material.

Description

【Technical field】 [0001] The invention belongs to the field of polyester fiber preparation, and in particular relates to an "8"-shaped PET (polyethylene terephthalate) / PTT (polytrimethylene terephthalate) hollow fiber and a preparation method thereof. 【Background technique】 [0002] With the improvement of social and economic development and people's living standards, people's requirements for clothing are getting higher and higher. Hollow fibers are also more and more popular because of their light weight, good warmth retention, moisture absorption and perspiration. Products are widely used in civilian clothing, sports clothing, professional clothing, interior decoration, bedding, footwear, medical supplies and advanced filling materials. [0003] At present, although there have been many studies on hollow polyester fibers, they are all based on a single type of polyester, so they are limited in performance to a large extent. In general, hollow fibers are rather unstable a...

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): D01D5/24D01D5/253D01D5/088D01D11/00D01F8/14D02G1/02D02J13/00D06C7/02
Inventor 王朝生王华平李晓琳张传雄韩庆祥周兆云
Owner DONGHUA UNIV
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