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Drawn and crimped composite fiber and preparation method thereof

A composite fiber and crimping technology, which is applied in the direction of stretch spinning, conjugated synthetic polymer rayon, textiles and papermaking, etc., can solve the problems of unreachable roughness, poor stability of crimp shape, and impact on fluffy effect, etc. Achieve excellent tensile elasticity and elastic recovery performance, good curling stability and low cost

Inactive Publication Date: 2017-06-16
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This manufacturing method of textured yarn mainly has two disadvantages: 1. The production efficiency is low, because the two-step method is adopted, and the process from pre-oriented yarn to textured yarn is interrupted, so that not only the production cycle is long, but also more labor is required.
2. The stability of the curl shape is poor. Since the false twist method is used for curling and the curl shape is cured by heat setting, the stability of the curl shape is poor. In the subsequent production and processing, the degree of curl is often changed due to factors such as external forces. Affect the fluffy effect
However, because the bicomponent fibers prepared by these methods are polyester materials, even if the polyester material with a smaller modulus such as polytrimethylene terephthalate is used alone, the roughness of its hand feeling cannot be fully satisfied. Degree

Method used

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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  • Drawn and crimped composite fiber and preparation method thereof
  • Drawn and crimped composite fiber and preparation method thereof
  • Drawn and crimped composite fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Put the polyethylene terephthalate (PET) pellets into a drying kettle, the drying temperature is 105°C, the drying time is 4.5h, the moisture content of the pellets after drying is 30ppm, and the dried PET The pellets are fed into the screw plasticizing extruder for heating and plasticizing. The plasticizing temperature of the PET pellet screw extruder is 250°C, 256°C, 260°C, 280°C, 290°C to obtain PET spinning melt;

[0034] (2) Put the polyester polyamide elastomer pellets into a drying kettle, and dry them under nitrogen ambient conditions. The drying temperature is 70° C., and the drying time is 10 hours. After drying, the moisture content of the pellets is 20 ppm. The polyamide elastomer pellets are respectively fed into the screw plasticizing extruder for heating and plasticizing. The plasticizing temperature of the polyester polyamide elastomer pellet screw extruder is 125°C, 130°C, 133°C, 135°C , 140°C to obtain a polyamide elastomer spinning melt;

[0035]...

Embodiment 2

[0037] (1) Put the PA66 polyamide pellets into a drying kettle, the drying temperature is 95°C, the drying time is 6h, the moisture content of the pellets after drying is 30ppm, and the dried PA66 polyamide pellets are fed into the screw plastic extrusion Out of the machine, heating and plasticizing, the plasticizing temperature of the PA66 polyamide pellet screw extruder is 245°C, 250°C, 254°C, 260°C, 280°C, and the PA66 polyamide spinning melt is obtained;

[0038] (2) Put the polyester polyamide elastomer pellets into a drying kettle, and dry them under nitrogen ambient conditions. The drying temperature is 70° C., and the drying time is 10 hours. After drying, the moisture content of the pellets is 20 ppm. The polyamide elastomer pellets are respectively fed into the screw plasticizing extruder for heating and plasticizing. The plasticizing temperature of the polyester polyamide elastomer pellet screw extruder is 125°C, 130°C, 133°C, 135°C , 140°C to obtain a polyamide ela...

Embodiment 3

[0041] (1) Put the polytrimethylene terephthalate (PTT) pellets into a drying kettle, the drying temperature is 100°C, the drying time is 4.5h, the moisture content of the dried pellets is 30ppm, and the dried PTT pellets are Feed into the screw plasticizing extruder for heating and plasticizing. The plasticizing temperature of the PTT pellet screw extruder is 245°C, 255°C, 260°C, 275°C, 285°C to obtain the PTT spinning melt;

[0042] (2) Put the polyester polyamide elastomer pellets into a drying kettle, and dry them under nitrogen ambient conditions. The drying temperature is 70° C., and the drying time is 10 hours. After drying, the moisture content of the pellets is 20 ppm. The polyamide elastomer pellets are respectively fed into the screw plasticizing extruder for heating and plasticizing. The plasticizing temperature of the polyester polyamide elastomer pellet screw extruder is 125°C, 130°C, 133°C, 135°C , 140°C to obtain a polyamide elastomer spinning melt;

[0043] (...

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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Abstract

The invention discloses a drawn and crimped composite fiber. The drawn and crimped composite fiber is prepared by compounding a polymer A and a polymer B, wherein the polymer A and the polymer B have different glass-transition temperatures. The drawn and crimped composite fiber prepared in the invention has a crimp form with characteristics resembling the crimp form of natural wool and has high crimp elastic recovery rate, good crimp stability and other performance. Compared with conventional self-crimped composite fibers, the composite fiber provided by the invention has better tensile elasticity and elastic recovery performance and feels more comfortable in contact of human skin since a fatty polyamide elastomer material is used at the outer crimped side of the dual-component fiber; and the fatty polyamide elastomer material contains polyether and / or polyester groups, so the fiber has good compatibility with a polyester material and a fatty polyamide material. The preparation method for the fiber is a high-speed one-step method and is high in production efficiency and low in cost.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a stretched and crimped composite fiber and a preparation method thereof. Background technique [0002] Polyester and polyamide fibers have become the first and second largest chemical fiber varieties in my country. They are widely used in clothing, decoration and industrial textiles, and become one of the basic raw materials for textiles. They are used to develop various clothing and household products (such as window screens, Mosquito nets, etc.), various bags, textiles for rain gear, textiles for canopies, etc. Polyamide filament fibers include drawn yarns, textured yarns and air textured yarns, among which textured yarns are widely used in clothing, hosiery and household products. At present, the production method of polyamide textured yarn is realized by a two-step method, that is, firstly, the pre-oriented yarn is prepared by polyamide melting, spinnin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/12D01F8/14D01D5/12D02J13/00D02G1/00
CPCD01D5/12D01F8/12D01F8/14D02G1/00D02J13/00
Inventor 董侠来悦王莉莉王笃金刘学新
Owner INST OF CHEM CHINESE ACAD OF SCI