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Preparation method of six-leaf porous hollow staple fibers spun from renewable polyester bottle flakes

A technology of regenerated polyester and short fibers, which is applied in the field of synthetic fiber processing, to achieve the effects of improved degree of irregularity and moisture absorption and water absorption, good resilience, and large specific surface area

Active Publication Date: 2015-03-04
江苏省科学技术情报研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Judging from a large number of documents retrieved, there is no public report on the six-lobe porous hollow short fiber and the six-lobe porous hollow spinneret used in the preparation of recycled polyester bottle flakes.

Method used

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  • Preparation method of six-leaf porous hollow staple fibers spun from renewable polyester bottle flakes
  • Preparation method of six-leaf porous hollow staple fibers spun from renewable polyester bottle flakes
  • Preparation method of six-leaf porous hollow staple fibers spun from renewable polyester bottle flakes

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Embodiment 1

[0028] A kind of regenerated polyester bottle flakes of the present invention spins the preparation method of six leaf porous hollow short fibers and the spinneret used thereof, realizes by following steps: choose the regenerated polyester bottle flakes that viscosity is 0.58dl / g as The spinning raw material is sent to a vacuum drum dryer for drying, the drying temperature is set at 150°C, and dried for 10 hours, so that the moisture content in the spinning raw material is less than 85PPM; 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 six-blade porous hollow spinneret to form primary fibers; Cooling, winding, bundling, drafting, crimping, oiling, relaxing heat setting, cutting, and packaging processes to produce six-leaf 7-hole hollow staple fibers with a fineness of 20.00dtex. During the sp...

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Abstract

The invention provides a preparation method of six-leaf porous hollow staple fibers spun from renewable polyester bottle flakes. The preparation method comprises the following steps: performing melt spinning on the renewable polyester bottle flakes after vacuum drum drying, enabling the renewable polyester bottle flakes to enter a spinning box body through screw extrusion, spinning out of spinneret orifices of a six-leaf porous hollow spinneret plate to obtain nascent fibers, cooling and forming through circulating air blowing, winding, bundling, drafting, crimping, oiling, loosening and heat setting, and cutting to obtain the six-leaf porous hollow staple fibers, wherein the spinneret orifices are formed in the six-leaf porous hollow spinneret plate and are arranged in arrays; inlets of the spinneret orifices are guide holes, and outlets of the spinneret orifices are spinning capillary holes; each spinning capillary hole comprises one central arc-shaped hole group and six peripheral arc-shaped hole groups; the six peripheral arc-shaped hole groups and the central arc-shaped hole group form a six-leaf structure. Through improvement of a spinning process and innovative design of the spinneret plate, the prepared six-leaf porous hollow staple fibers have the characteristics of high hollow degree, high rebound resilience, large specific surface area, good moisture-absorbing and breathable effect and the like.

Description

technical field [0001] The invention relates to the technical field of synthetic fiber processing, in particular to a method for preparing six-lobed porous hollow short fibers spun from recycled polyester bottle flakes and a spinneret used therefor. 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 specifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/08D01D5/14D01D5/253D01D5/24
CPCD01D5/08D01D5/14D01D5/24D01D5/253D01D10/02
Inventor 夏太寿殷铭袁宝庆
Owner 江苏省科学技术情报研究所
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