Preparation method of melt spinning polyurethane fiber thin denier filament

A fine denier, spandex technology, applied in the direction of single-component polyurethane rayon filament, synthetic polymer rayon filament chemical post-treatment, etc., can solve the problem of low breaking strength, low elastic recovery rate, and influence Fiber physical and mechanical properties

Inactive Publication Date: 2003-04-16
江苏南黄海实业股份有限公司
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Problems solved by technology

[0003] The typical representative of the first process is the product of Kuraray Company in Japan, and the elastic recovery rate of the fine-denier spandex yarn spun by it is obviously low
This technology simplifies the production process on the surface, but it has high requirements on the thermal stability, hydrolysis stability and precise ratio of raw materials of thermoplastic polyurethane, and the elastic recovery rate is not high.
The typical representative of the second process is Bell Spinning Company in Japan. The breaking strength of the

Method used

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  • Preparation method of melt spinning polyurethane fiber thin denier filament
  • Preparation method of melt spinning polyurethane fiber thin denier filament

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Embodiment Construction

[0018] After the thermoplastic polyurethane chips are cleaned, they are mixed with additives other than the crosslinking agent and dried. The dried materials are put into the screw extruder, melted and mixed, and enter the mixing section in the metering section of the extruder or after exiting the extruder. A certain amount of cross-linking agent is added in front of the machine, and the melt-spun material is sprayed out through the spinneret, and the as-spun yarn is stretched, cooled, oiled, and wound, and the melt-spun fine-denier spandex filament is obtained. The reason why the present invention successfully melt-spun fine-denier spandex filaments is that it solves the problem of supporting the use of cross-linking agents and thermoplastic polyurethanes.

[0019] The supporting use of the cross-linking agent and thermoplastic polyurethane refers to the supporting use of the chemical composition of the cross-linking agent and the composition of thermoplastic polyurethane. Th...

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Abstract

The method includes following steps. (1) With being added in the screw extruder, the thermoplastic polyurethane is melted and mixed. (2) The crosslinking agent is added in the metering section of theextruder or between the extruder and mixer. (3) The melted woven material through the nozzle plate is ejected, spun and wound. The invention solves the issue of the mating use between the thermoplastic polyurethane and the crosslinking agent and prevents the thermal degradationand the carbonization so as to obtain the product with excellent combination property.

Description

technical field [0001] The method for preparing fine-denier spandex filaments disclosed by the present invention refers to the preparation of melt-spun spandex filaments with deniers in the range of 10-30 deniers. Background technique [0002] In the prior art, melt-spun spandex generally includes two processes: [0003] The typical representative of the first process is the product of Kuraray Co., Ltd. in Japan. The elastic recovery rate of the fine-denier spandex yarn spun out of it is obviously low. This technology simplifies the production process on the surface, but it has high requirements on the thermal stability, hydrolysis stability and precise ratio of raw materials of thermoplastic polyurethane, and the elastic recovery rate is not high. The typical representative of the second process is Bell Spinning Company in Japan. The breaking strength of the inner melt-spun spandex filaments spun out by it is relatively low. In this technology, thermoplastic polyurethane w...

Claims

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Application Information

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IPC IPC(8): D01F6/70D01F11/06
Inventor 朱新生程嘉祺扈益民
Owner 江苏南黄海实业股份有限公司
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