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PTT/PET composite elastic short fiber for spinning and preparation method thereof

A short fiber and elastic technology, applied in the field of spinnable PTT/PET composite elastic staple fiber and its preparation, can solve the problems of poor control of elasticity, prone to doffing, lack of elasticity, etc. The effect of doffing and improving production efficiency

Inactive Publication Date: 2020-12-29
SHANGHAI HAIKAI BIO MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The production method of three-dimensional hollow fiber elastic formation is mainly processed by a crimping machine. It has been proved by experiments that the elastic fiber produced by the hollow fiber production method has good spinnability, low density and good looseness. However, due to the conventional three-dimensional hollow fiber The fiber is a single-component fiber, and its bulkiness and feel are very different from that of wool, and its elasticity is very small or even has no elasticity.
However, due to the many curls of its fibers, the elasticity is not easy to control, and problems such as doffing are prone to occur during spinning, so it has not been well utilized in the textile field at present.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for preparing PTT / PET composite elastic short fibers for spinning, using PET raw material with intrinsic viscosity of 0.50dL / g and PTT raw material with intrinsic viscosity of 0.60dL / g. After the raw materials are placed in a drying tower for drying and pre-crystallization, they are then melt-extruded and spun to shape. The two raw materials use independent and separated conveying and melting screws, and after being metered by their respective melt metering pumps, they are sent to a special composite spinning box at 270°C in accordance with the ratio of PET:PTT mass ratio of 90:10. The melt from the wire box is introduced into the spinneret and sprayed out, and a tow with a juxtaposed shape is formed after spraying out. After the primary fiber is cooled, it is oiled and subjected to stretching, tension and heat setting treatment. The raw silk adopts four-stage drafting, and the total drafting ratio is 3.0. The first stage achieves 2.8 times of drafting at 150°...

Embodiment 2

[0022] A method for preparing PTT / PET composite elastic short fibers for spinning, using PET raw material with intrinsic viscosity of 0.70dL / g and PTT raw material with intrinsic viscosity of 0.80dL / g. After the raw materials are placed in a drying tower for drying and pre-crystallization, they are then melt-extruded and spun to shape. The two raw materials use independent and separated conveying and melting screws, and after being metered by their respective melt metering pumps, they are sent to a special composite spinning box at 270°C in accordance with the ratio of PET:PTT mass ratio of 80:20. The melt from the wire box is introduced into the spinneret and sprayed out, and a tow with a juxtaposed shape is formed after spraying out. After the primary fiber is cooled, it is oiled and subjected to stretching, tension and heat setting treatment. The raw silk is drawn in four stages, with a total draft ratio of 3.2. The first stage achieves 3.0 times draft at 150°C, and the se...

Embodiment 3

[0025] A method for preparing PTT / PET composite elastic short fibers for spinning, using PET raw material with intrinsic viscosity of 0.70dL / g and PTT raw material with intrinsic viscosity of 0.80dL / g. After the raw materials are placed in a drying tower for drying and pre-crystallization, they are then melt-extruded and spun to shape. The two raw materials use independent and separated conveying and melting screws, and after being metered by their respective melt metering pumps, they are sent to a special composite spinning box at 270°C in accordance with the ratio of PET:PTT mass ratio of 70:30. The melt from the wire box is introduced into the spinneret and sprayed out, and a tow with a juxtaposed shape is formed after spraying out. After the primary fiber is cooled, it is oiled and subjected to stretching, tension and heat setting treatment. The raw silk adopts four-stage drafting, with a total draft ratio of 3.4. The first stage achieves a 3.15-fold draft at 150°C, and t...

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Abstract

The invention discloses a PTT / PET composite elastic short fiber for spinning and a preparation method thereof. The PTT / PET composite elastic short fiber for spinning is formed by composite spinning ofthe following raw materials including, by mass, 30%-95% of PET slices and 5%-70% of PTT slices, wherein the raw material intrinsic viscosity of the PET slices is 0.42-0.83 d L / g, and the raw materialintrinsic viscosity of the PTT slices is 0.67-1.10 d L / g. According to the PTT / PET composite elastic short fiber, by reducing the PTT component content and reasonably selecting the viscosity ratio ofthe two components, the draft multiple of the PET / PTT composite fiber is increased, generation of the moment difference of the two components of the fiber is guaranteed, the improvement of the mechanical property and the curling property of the fiber is promoted, and the problems of doffing and the like of the PET / PTT composite fiber during spinning are solved.

Description

technical field [0001] The invention relates to the technical field of textile materials, in particular to a PTT / PET composite elastic short fiber for spinning and a preparation method thereof. Background technique [0002] At present, elastic staple fibers on the market are generally produced by a production method in which single-component PET three-dimensional crimped hollow fibers are crimped by a mechanical crimping machine and then shaped by a relaxation heat setting machine. [0003] The production method of three-dimensional hollow fiber elastic formation is mainly processed by a crimping machine. It has been proved by experiments that the elastic fiber produced by the hollow fiber production method has good spinnability, low density and good looseness. However, due to the conventional three-dimensional hollow fiber The fiber is a single-component fiber, and its bulkiness and feel are very different from that of wool, and its elasticity is small or even non-elastic. ...

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): D01D5/32D01F8/14D01D5/092D01D5/12D01D10/02
CPCD01D5/092D01D5/12D01D5/32D01D10/02D01F8/14
Inventor 欧阳文咸蔡涛
Owner SHANGHAI HAIKAI BIO MATERIAL CO LTD
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