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Production method of PTT/PET parallel composite elastic short fibers without mechanical crimping

A production method and short fiber technology, which is applied in the production field of non-mechanical crimp PTT/PET side-by-side composite elastic short fiber, can solve the problems of no elasticity and small elasticity, and achieve the effect of good elasticity, good elasticity and soft hand feeling

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

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.

Method used

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  • Production method of PTT/PET parallel composite elastic short fibers without mechanical crimping

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Embodiment 1

[0018] see figure 1 , in the embodiment of the present invention, the production of 2.0dtex×38mm non-mechanical crimp PTT / PET side-by-side composite elastic short fibers: first produce 5.85dtex composite precursors, the cross-section is side-by-side, the moisture content range is 24.5%, and the elongation at break range is 450-500 %; After the raw silk is drawn, the composite tow after drawing is oiled through the oiling device in front of the tension setting machine after bundling and drawing, and the tow after oiling enters the tension heat setting for oiling Curing and tow orientation shaping. The shaped tow is directly sent to the cutting machine through the conveyor belt 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 staple fibers.

Embodiment 2

[0020] see figure 1 , in the embodiment of the present invention, the production of 3.0dtex×51mm non-mechanical crimp PTT / PET side-by-side composite elastic short fibers: first produce 11.50dtex composite precursors, the cross-section is side-by-side, the moisture content range is 24.5%, and the elongation at break range is 500- 550%; post-drawing treatment of the raw silk, through the oiling device in front of the tension setting machine after bundling and drawing, the composite tow after drawing is oiled, and the tow after oiling enters the tension heat setting for oiling Curing agent and tow orientation setting. The shaped tow is sent directly to the cutting machine through the conveyor belt for cutting, and then sent to the baler for packaging to obtain 3.0dtex×51mm non-mechanical crimp PTT / PET side-by-side composite elastic staple fiber.

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Abstract

The invention discloses a production method of PTT / PET parallel composite elastic short fibers without mechanical crimping. The production method comprises the following steps: (1) performing crystallization and drying and melted extrusion on two raw materials, including a modified PET raw material a and a polytrimethylene terephthalate raw material b, with different properties; entering a spinning manifold and a high-volume double-channel composite spinning assembly for compounding to obtain filament bundles in parallel shapes; spinning, annular blowing cooling, oiling, winding and falling into a barrel to prepare a PTT / PET parallel composite elastic short fiber primary filament c; and (2) performing bundling, stretching, oiling, tension heat setting and cutting the primary filament c and feeding into a packaging machine to be packaged. Because the special high-volume double-channel composite spinning assembly and a multi-roller tension heat setting device are adopted, and a crimping device and a loosening heat setting machine in production of conventional polyester short fibers are eliminated, the parallel composite elastic short fibers prepared by using the method are moderate in elasticity and high in stretching resilience and have a good hand feeling.

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 non-mechanical crimping 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 being crimped by a mechanical crimping machine and then set by a relaxation heat setting machine. 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 ela...

Claims

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Application Information

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IPC IPC(8): D01F8/14D01D5/32D02J1/22D02J13/00
CPCD01F8/14D01D5/32D02J1/22D02J13/00
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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