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Method for processing high shrinkage superfine denier polyester staple fiber

A technology of ultra-fine denier polyester and processing methods, which can be applied in the direction of short fiber formation, fiber treatment, melt spinning, etc., can solve the problems of low linear density and increased shrinkage, and achieve high water absorption and air permeability, soft and good hand feeling and milled style effect

Inactive Publication Date: 2009-08-12
JIANGSU SHENGHONG CHEM FIBRE CO LTD
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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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  • Method for processing high shrinkage superfine denier polyester staple fiber

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Embodiment Construction

[0013] The present invention will be described in detail below through specific examples.

[0014] According to raw material drying, pre-spinning part and post-spinning part respectively:

[0015] (1) slice drying part:

[0016] The high-shrinkage polyester chips are dried by vacuum drum, the drying temperature is 55-60°C, the drying time is 36 hours, and the vacuum degree is -0.2MPa.

[0017] (2) Pre-spinning part:

[0018] 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 turned on to circulate.

[0019] 2. The spinneret adopts 1455 (0.2*0.5), and the assembly is filled with 900 grams of sea sand. The preheating temperature is 260°C and the time is 18 hours. ℃, wind pressure 490Pa.

[0020] 3. The temperature of each zone of the screw: the first zone is 196°C, the second zone is 236°C, the third zone is 248°C, the fourth zone is 270°C, the fifth zone is 275°C, the head is 264°C, and the box is 2...

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Abstract

The invention relates to a processing method of high-shrinkage ultrathin polyester short fiber. The process flows of the method comprise: high-shrinkage polyester slicing, vacuum rotary drum drying, intermediate bunker, screw extruder, spinning box, metering pump, spinning component, spinneret plate, circular blowing cooling, double side oiling, drawing groove, second drawing (seven rollers), third drawing (seven rollers), feeding roller, yarn containing drum, drying, cutting and obtaining finished product. The technological parameter of the method is characterized in that slice drying adopts a vacuum rotary drum low-temperature longtime process; spinning temperature and preliminary drawing multiple are properly lowered; low-temperature drawing and unshaped drawing process are adopted; and the spinneret plate adopts a finishing spinneret plate which has 0.2*0.5mm aperture and is matched with a corresponding component. Due to adopting high-shrinkage functional polyester slice as a raw material, the processing method can realize production on common polyester short fiber spinning equipment without changing the prior spinning equipment during production.

Description

technical field [0001] The invention relates to a processing method of polyester staple fiber. The method adopts a slice spinning process route and unique process parameters to produce high-shrinkage superfine denier polyester staple fiber, which belongs to the technical field of chemical fiber production. Background technique [0002] Polyester staple fiber is widely used in high-end clothing, leather products, medical surgery, military supplies and many other fields due to its high strength, good durability, corrosion resistance and mildew resistance. [0003] There are many types of polyester staple fiber, which can be divided into high-strength and low-stretch type, medium-strength and medium-stretch type, low-strength and medium-stretch type, high-modulus type, high-strength and high-modulus type according to physical properties; according to post-processing requirements, it can be divided into cotton type , wool type, linen type, silk type; according to the use, it can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/26D01F6/92D01D5/08D01D5/098D01D5/253
Inventor 辛婷芬田会双高国洪
Owner JIANGSU SHENGHONG CHEM FIBRE CO LTD
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