Elastic composite fiber and manufacturing method thereof

A technology of elastic composite fibers and manufacturing methods, applied in fiber processing, conjugated synthetic polymer artificial filaments, melt spinning, etc., can solve the problems of general three-dimensional crimping, poor thermal stability, and lack of elasticity, etc., to achieve Good spinnability, bright colors, good fluffy effect

Active Publication Date: 2019-07-19
SHANGHAI HAIKAI BIO MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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.
For example, the Chinese invention patent application (the company's own application) with the application number 201810987214.0 discloses an elastic composite fiber and its manufacturing method, which specifically includes low-viscosity PET, high-viscosity PET and PTT of the fiber body. The three materials can be used in the corresponding process. Preparation of elastic composite fibers, but the elastic composite fibers have the defects of average three-dimensional crimp and poor thermal stability

Method used

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  • Elastic composite fiber and manufacturing method thereof
  • Elastic composite fiber and manufacturing method thereof
  • Elastic composite fiber and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for manufacturing elastic composite fibers, comprising the steps of:

[0026] Step A: Dry low-viscosity PET, high-viscosity PET, PTT, and PBT until the water content is less than 15ppm. The viscosity of low-viscosity PET is 0.42dL / g, the viscosity of high-viscosity PET is 0.83dL / g, and the viscosity of PTT is 0.92dL / g, PBT viscosity is 0.92dL / g;

[0027] Step B: Put low-viscosity PET, high-viscosity PET, PTT, and PBT into the screw extruder for melt extrusion, and meter them into the composite spinning assembly through a metering pump. The composite spinning assembly is a large-capacity double The spinning member of the channel composite spinning device, the weight percentage of low viscosity PET accounts for 20% of the total material, the weight percentage of high viscosity PET accounts for 20% of the total material, the weight percentage of PTT accounts for 30% of the total material, and the weight of PBT The percentage accounts for 30% of the total material...

Embodiment 2

[0032] Step A: Dry low-viscosity PET, high-viscosity PET, PTT, and PBT until the water content is less than 15ppm. The viscosity of low-viscosity PET is 0.42dL / g, the viscosity of high-viscosity PET is 0.83dL / g, and the viscosity of PTT is 0.92dL / g, PBT viscosity is 0.92dL / g;

[0033] Step B: Put low-viscosity PET, high-viscosity PET, PTT, and PBT into the screw extruder for melt extrusion, and meter them into the composite spinning assembly through a metering pump. The composite spinning assembly is a large-capacity double The spinning member of the channel composite spinning device, the weight percentage of low viscosity PET accounts for 20% of the total material, the weight percentage of high viscosity PET accounts for 20% of the total material, the weight percentage of PTT accounts for 30% of the total material, and the weight of PBT The percentage accounts for 30% of the total material; the melt from the composite spinning assembly is introduced into the spinneret to be s...

Embodiment 3

[0038] A method for manufacturing elastic composite fibers, comprising the steps of:

[0039] Step A: Dry low-viscosity PET, high-viscosity PET, PTT, and PBT until the water content is lower than 15ppm. The viscosity of low-viscosity PET is 0.55dL / g, the viscosity of high-viscosity PET is 0.75dL / g, and the viscosity of PTT is 0.95dL / g, PBT viscosity is 0.95dL / g;

[0040] Step B: Put low-viscosity PET, high-viscosity PET, PTT, and PBT into the screw extruder for melt extrusion, and meter them into the composite spinning assembly through a metering pump. The composite spinning assembly is a large-capacity double The spinning member of the channel composite spinning device, the weight percentage of low viscosity PET accounts for 20% of the total material, the weight percentage of high viscosity PET accounts for 20% of the total material, the weight percentage of PTT accounts for 30% of the total material, and the weight of PBT The percentage accounts for 30% of the total materia...

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Abstract

The invention discloses an elastic composite fiber. The fiber comprises a fiber body, and the fiber body is characterized by being prepared from, by weight, 10%-90% of low viscosity PET, 10%-90% of high viscosity PET, 10-80% of PTT and 10-80% of PBT through composite spinning. The fiber combines the advantages of three fibers of the PET, PTT and PBT, and not only has the advantages of good spinnability, high strength, good elasticity, softness, comfort, easy dyeing, moisture absorption and the like, but also utilizes reasonable cooperation between materials and the difference between physicaland chemical properties to make the three-dimensional structure of the composite fiber more remarkable and the thermal stability better.

Description

technical field [0001] The invention relates to an elastic composite fiber and a manufacturing method thereof. Background technique [0002] With the continuous improvement of people's living standards, people's requirements for clothing styles are also increasing. Elastic fabrics are popular in the international market. The raw materials of domestic high-elastic fabrics mainly rely on spandex, but spandex is highly elastic and easy to slide, so it is rarely used alone as a fabric. Generally, other yarns are used to make core-spun yarns or covered yarns for weaving. The weaving process of spandex is complicated, and the dyeability is poor. At present, a kind of three-dimensional crimped elastic staple fiber has been developed on the market, which is to adopt the production method of single-component PET three-dimensional crimped hollow fiber to be crimped by a mechanical crimping machine and then shaped by a relaxation heat setting machine to obtain a mechanically crimped e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14D02J1/22
CPCD01F8/14D02J1/224D01D5/30D10B2401/061D01D5/10D10B2331/04
Inventor 蔡涛欧阳文献冯永生
Owner SHANGHAI HAIKAI BIO MATERIAL CO LTD
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