Method for spinning 8-shaped hollow staple fiber through regenerated polyester

A regenerated polyester, figure-8 technology, applied in the directions of melt spinning, fiber processing, hollow filament manufacturing, etc., to achieve the effects of improved fiber profile, high hollowness, and improved moisture absorption and air permeability.

Inactive Publication Date: 2019-01-18
扬州天富龙集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to a large number of documents retrieved, the 8-shaped hollow staple fibers and the 8-shaped hollow short fibers used in them are currently made of recycled polyester materials composed of waste polyester bottle flakes, waste polyester cloth corner foam materials and waste polyester filament foam materials. Silk board has no public reports

Method used

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  • Method for spinning 8-shaped hollow staple fiber through regenerated polyester
  • Method for spinning 8-shaped hollow staple fiber through regenerated polyester
  • Method for spinning 8-shaped hollow staple fiber through regenerated polyester

Examples

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Embodiment 1

[0024] A method for spinning figure-eight hollow staple fibers with recycled polyester material according to the present invention and the spinneret used therein are realized through the following steps: select recycled polyester material with an intrinsic viscosity of 0.58dl / g as raw material, send Put it into a vacuum drum dryer for drying, the drying temperature is 155°C, and the drying time is about 8 hours, so that the moisture content of the dried spinning raw material is less than 100PPM; the dried spinning raw material is fed into the melt spinning equipment for melt spinning , the molten spinning raw material is extruded into the spinning box through a screw extruder, and is sprayed out from the spinneret holes of the 8-shaped hollow spinneret to form nascent fibers; after that, the nascent fibers are cooled by a ring blowing device, and then passed through Winding, clustering, drafting, crimping, oiling, relaxing heat setting, cutting, and packaging to produce 8-shape...

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Abstract

The invention provides a method for spinning 8-shaped hollow staple fiber through regenerated polyester. The regenerated polyester is dried by a vacuum drum, then subjected to melt spinning, extrudedby a screw to enter a spinning box body and sprayed out of spinneret orifices of an 8-shaped hollow spinneret plate, and primary fiber is obtained; then, the 8-shaped hollow staple fiber is prepared through the processes of annular-blowing air-cooling forming, winding, bundling, drafting, curling, oiling, loose heat setting and cutting. The spinneret orifices are formed in the 8-shaped hollow spinneret plate and distributed in arrays, inlets of the spinneret orifices are guide holes, and outlets of the spinneret orifices are spinneret capillary holes; two symmetrical arc-shaped (C-shaped) holegroups are arranged on the spinneret capillary holes to form an 8-shaped structure. By improving the spinning process and innovatively designing the spinneret plate, the prepared 8-shaped hollow staple fiber has the advantages of being high in hollowness degree, good in warmth keeping performance, high in rebound resilience, capable of absorbing moisture and breathable.

Description

technical field [0001] The invention relates to a method for producing polyester staple fibers, in particular to a method for spinning figure-eight hollow staple fibers from regenerated polyester materials. Background technique [0002] The cross-sectional shape of the recycled polyester hollow staple fiber is closely related to the characteristics of the fiber. The profile of hollow fibers with special-shaped cross-section is irregular, which is beneficial to improve the fluffy feeling, luster effect and soft touch of fiber fabrics, and improve the air permeability, moisture absorption and anti-pilling properties of fiber fabrics. Ordinary recycled polyester hollow staple fibers usually have a circular cross-section. Although there is a continuous cavity inside the fiber, which can reduce the volume quality of the fiber and improve the heat insulation and warmth retention of the fabric, this type of short fiber has a small specific surface area and low hollowness. , Resili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/24D01D5/253D01D5/098D01G1/04
CPCD01D5/098D01D5/24D01D5/253D01G1/04
Inventor 周国祥朱大庆袁宝庆殷铭
Owner 扬州天富龙集团股份有限公司
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