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Production method for PTT (Poly Trimethylene terephthalate)/PET (Poly Ethylene Terephthalate) side-by-side composite elastic short fibers

A production method and short fiber technology, which is applied in the production field of PTT/PET side-by-side composite elastic short fibers, can solve the problems of small elasticity and no elasticity, and achieve the effects of good elasticity, soft hand feeling and high bulkiness.

Inactive Publication Date: 2015-05-06
福建省海兴凯晟科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the elastic staple fibers on the market are generally produced by the production method of single-component PET three-dimensional crimped hollow fibers after being crimped by a mechanical crimping machine and then shaped by a relaxation heat setting machine. The production method of three-dimensional hollow fiber elastic formation It is mainly processed by a crimping machine. Experiments have proved that the elastic fiber produced by the hollow fiber production method has good spinnability, low density and good looseness. However, because the conventional three-dimensional hollow fiber is a single-component fiber, it is fluffy. Compared with wool, the property and feel are very different, and the elasticity is very small or even has no elasticity.

Method used

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  • Production method for PTT (Poly Trimethylene terephthalate)/PET (Poly Ethylene Terephthalate) side-by-side composite elastic short fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] see figure 1 , in Example 1 of the present invention, the production of 2.0dtex×38mm side-by-side PTT / PET composite elastic short fibers:

[0019] Firstly, 5.85dtex composite precursors are produced, with side-by-side cross-section, moisture content range of 24.5%, and elongation at break range of 450-550%. After the filaments are drawn, they are oiled before the tension setting machine after bundled and drawn. The device performs oiling treatment on the composite tow after drawing. After oiling, the tow enters the crimper for further crimping performance enhancement, and then enters relaxation heat setting for oil curing and tow orientation setting. The shaped tow passes through The conveyor belt is directly sent to the cutting machine for cutting, and then sent to the baler for packaging to obtain 2.0dtex×38mm non-mechanical crimp PTT / PET side-by-side composite elastic short fibers.

Embodiment 2

[0021] see figure 1 , to produce 3.0dtex×51mm medium-length side-by-side PTT / PET composite elastic staple fibers:

[0022] Firstly, 11.50dtex composite precursors are produced, with side-by-side cross-section, moisture content range of 24.5%, and elongation at break range of 500-550%; the precursor yarns are post-drawn, and oiled after the tension setting machine after clustering and drafting The device performs oiling treatment on the drawn composite tow. After oiling, the tow enters the crimping machine for further crimping performance enhancement, and then enters relaxation heat setting for oil curing and tow orientation setting. The tow after shaping is directly Send it to the cutting machine for cutting, and then send it to the baler for packaging to obtain 3.0dtex×51mm medium-length side-by-side PTT / PET composite elastic short fibers.

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Abstract

The invention discloses a production method for PTT (Poly Trimethylene terephthalate) / PET (Poly Ethylene Terephthalate) side-by-side composite elastic short fibers. The production method comprises the following steps of (1) compositing a raw material a, namely, modified PET and a material b, namely, PTT in a large-capacity two-channel composite spinning assembly after respectively passing through crystallizing and drying equipment, melting and extruding equipment and a spinning manifold, obtaining a strand with a side-by-side shape, and then obtaining a PTT / PET side-by-side composite elastic short fiber precursor c after spinning, circular blowing cooling, oiling, rolling and falling into a barrel; (2) feeding the precursor c into a packaging machine for packaging after bundling, drafting, oiling, tension heat setting, oiling, mechanical rolling, relaxation heat setting and cutting. According to the production method disclosed by the invention, since the special composite spinning manifold, the large-capacity two-channel composite spinning assembly and a multi-roller tension heat setting instrument device are adopted, the PTT / PET side-by-side composite elastic short fiber prepared by the production method has moderate elasticity, excellent hand feeling and good stretch elastic recovery.

Description

technical field [0001] The invention relates to a production process of polyester synthetic composite spinning staple fiber, in particular to a production method of PTT / PET side-by-side composite elastic staple fiber. Background technique [0002] At present, the elastic staple fibers on the market are generally produced by the production method of single-component PET three-dimensional crimped hollow fibers after being crimped by a mechanical crimping machine and then shaped by a relaxation heat setting machine. The production method of three-dimensional hollow fiber elastic formation It is mainly processed by a crimping machine. Experiments have proved that the elastic fiber produced by the hollow fiber production method has good spinnability, low density and good looseness. However, because the conventional three-dimensional hollow fiber is a single-component fiber, it is fluffy. Compared with wool, its softness and hand feel are very different, and its elasticity is very...

Claims

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Application Information

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IPC IPC(8): D01D5/32D01D5/08D02J1/22D02J13/00D01F8/14
CPCD02J13/00D06C7/02
Inventor 欧阳文咸张连京冯永生郑唏刘洪彦孙玉成
Owner 福建省海兴凯晟科技有限公司
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