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Preparation process of LMPET/PET sheath-core type composite elastic fiber

A composite elastic fiber and preparation technology, applied in fiber processing, filament/thread forming, conjugated synthetic polymer artificial filament, etc., can solve the problem of increasing spinning difficulty, crystallization performance, thermal stability and melt fluidity Change and other problems, to achieve the effect of easy replacement and maintenance, good laminar flow, simple and convenient operation

Inactive Publication Date: 2021-01-22
JIANGSU HUAYA FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since hot-melt polyesters are often prepared by polycondensation of terephthalic acid (PTA), isophthalic acid (IPA) and butanediol (BDO), with the increase of isophthalic acid and butanediol components Addition, the macromolecular structure undergoes a fundamental change, while the hot-melt polyester achieves a low melting point, its crystallization properties, thermal stability, melt fluidity, etc. undergo significant changes, thereby increasing the difficulty of spinning, especially spinning Monofilaments with relatively thick fiber density cannot be crystallized and cooled to form at all

Method used

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  • Preparation process of LMPET/PET sheath-core type composite elastic fiber

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Effect test

Embodiment 1

[0028] A kind of LMPET / PET sheath-core type composite elastic fiber preparation process of the present invention, it comprises the following steps,

[0029] (1) Transport the LMPET melt and PET melt to the composite spinning box through the melt delivery pipeline and the metering pump respectively, and install a filter and a booster pump on the melt delivery pipeline, wherein the LMPET melt delivery pipeline is heated The temperature is controlled at 246°C, the heating temperature of the PET melt conveying pipeline is controlled at 292°C, and the composite spinning box includes LMPET spinning box, PET spinning box and spinning component box, and the temperature of LMPET spinning box is 255°C. The temperature of the PET spinning box is 296°C;

[0030] (2) Extrusion through skin-core spinneret, cooling by side blowing, cluster oiling, pre-netting, drafting, netting, and winding. The drafting includes three hot rollers, which are HGR1 and HGR2 respectively And HGR3, the temperat...

Embodiment 2

[0038] A kind of LMPET / PET sheath-core type composite elastic fiber preparation process of the present invention, it comprises the following steps,

[0039] (1) The LMPET melt and PET melt are transported to the composite spinning box through the melt delivery pipeline and the metering pump respectively, and a filter and a booster pump are installed on the melt delivery pipeline, and the LMPET melt delivery pipeline is heated The temperature is controlled at 248°C, the heating temperature of the PET melt conveying pipeline is controlled at 293°C, and the composite spinning box includes LMPET spinning box, PET spinning box and spinning component box, and the temperature of LMPET spinning box is 255°C. The temperature of the PET spinning box is 296°C;

[0040] (2) Extrusion through skin-core spinneret, side blowing cooling, cluster oiling, pre-netting, drafting, netting, and winding. The drafting includes three hot rollers, which are HGR1 and HGR2 respectively And HGR3, the tem...

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Abstract

The invention relates to a preparation process of a LMPET / PET sheath-core type composite elastic fiber. The preparation process comprises: 1, conveying an LMPET melt and a PET melt to a composite spinning box through a melt conveying pipeline and a metering pump correspondingly, and mounting a filter and a booster pump on the melt conveying pipeline; and 2, extruding the melt through a sheath-corespinneret plate, cooling the extruded melt by side blowing, and carrying out bundling and oiling, pre-interlacing, drafting, interlacing and winding. The process is simple in technology, stable in product quality and low in production cost.

Description

technical field [0001] The invention belongs to the technical field of textiles, and in particular relates to a preparation process of a sheath-core type composite fiber. Background technique [0002] At present, fibers are widely used in various fields such as textiles, medical care, safety protection, packaging, electronic appliances, and environmental protection. With the progress of society and the continuous improvement of people's living standards, people's demand for functional and differentiated fibers is increasing. come higher. [0003] Composite fiber refers to a chemical fiber made of two polymers, two or more polymers, or the same polymer with different properties through composite spinning, and contains two or more immiscible components in the cross section of the fiber. point. According to the structure, common composite fibers are side-by-side, sheath-core, island-in-the-sea, and split. In the prior art, when preparing two-component sheath-core composite f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/34D01D5/088D01D5/098D01D1/09D01F8/14D02J1/08
CPCD01D5/34D01D5/088D01D5/098D01D1/09D01F8/14D02J1/08D10B2401/061
Inventor 钟传武谭平乃嵇恒牛春晖罗军陈义军
Owner JIANGSU HUAYA FIBER
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