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Method for processing differential polyester staple fiber

A polyester staple fiber and processing method technology, which is applied in the fields of short fiber formation, melt spinning, textiles and papermaking, can solve the problems of low linear density and increased shrinkage, and achieve high water absorption and air permeability, soft hand feeling and stable operation Effect

Inactive Publication Date: 2009-04-29
周琴
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, limited by the process conditions and equipment conditions, it is difficult to improve the shrinkage rate while producing ultrafine denier polyester staple fibers. Reasons for shrinkage performance of polyester staple fibers with a linear density lower than 1.10dtex

Method used

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Embodiment Construction

[0012] The present invention will be described in detail below through specific embodiments.

[0013] According to the raw material drying, the pre-spinning part and the post-spinning part are described separately:

[0014] (1) Drying part of slice:

[0015] The high shrinkage polyester chips are dried by a vacuum drum, the drying temperature is 55-60°C, the time is 36 hours, and the vacuum degree is -0.2MPa.

[0016] (2) Front spinning part:

[0017] 1. The pre-crystallizer temperature of the drying system is 68°C, the temperature of the filling dryer is 32°C, and the fan is cycled.

[0018] 2. The spinneret adopts 1455 (0.2*0.5), the component is filled with 900 grams of sea sand, the preheating temperature is 260℃, and the time is 18 hours. The pump supply is 1000g / min* bit, the spinning speed is 950m / min, and the ring blowing air temperature is 25 ℃, wind pressure 490Pa.

[0019] 3. The temperature of each zone of the screw: 196°C in the first zone, 236°C in the second zone, 2...

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Abstract

The invention relates to a method for processing differential polyester staple fibers. The method adopts a technological process as follows: a high-shrinkage polyester chip is dried in a vacuum rotary drum, conveyed into an intermediate bin, a screw extruder, a spinning box, a metering pump, a spinning component and a spinneret plate in turn, subjected to circular blowing-cooling and double-side oiling, conveyed into a drafting groove, subjected to secondary drafting and third drafting and conveyed into a silk holding bucket through a feeding roller, and then silk is dried and cut off so as to obtain finished products. The technological parameters of the method are characterized in that chip drying adopts the vacuum rotary drum and a low-temperature long-time process; spinning temperature and prestretching multiple are appropriately lowered; low-temperature stretching and an indefinite-form drafting process are adopted; and the spinneret plate adopts a finishing spinneret plate with the pore diameter of 0.2x0.5 millimeter, and is used together with corresponding components. As the high-shrinkage functional polyester chip is adopted as a raw material, the prior spinning equipment needs no alteration during production, and the differential polyester staple fibers can be produced on common polyester staple fiber spinning equipment.

Description

Technical field [0001] The invention relates to a differential polyester staple fiber processing method. The method adopts a chip spinning process route and unique process parameters to produce high-shrinkage superfine denier polyester staple fiber, and belongs to the technical field of chemical fiber production. Background technique [0002] Polyester staple fiber is widely used in many fields such as high-end clothing, leather products, medical surgery, military supplies, etc. due to its high strength, good durability, corrosion resistance and mildew resistance. [0003] There are many types of polyester staple fibers. According to their physical properties, they can be divided into high-strength low-elongation type, medium-strength medium-extension type, low-strength medium-extension type, high modulus type, high-strength high modulus type; according to post-processing requirements, they can be divided into cotton type , Wool type, hemp type, silk type; according to the purpos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/08D01D5/26D01D11/00D02J1/22
Inventor 周琴
Owner 周琴
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