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Production method of polyster fiber

A technology of polyester fiber and production method, applied in the production field of polyester fiber, can solve the problems of increasing difficulty, drying, spinning difficulty, increasing production cost and the like

Active Publication Date: 2012-11-21
JIANGSU JIANGNAN HIGH POLYMER FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the introduction of a large amount of copolymerization components, drying and spinning will be difficult, which not only increases the production cost, but also increases the difficulty of each link of production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The recovered PET bottle flakes (viscosity 0.80dl / g, melting point 253°C) and PET filament (viscosity 0.58dl / g, melting point 255°C) were mixed evenly and vacuum-dried at 150°C, then kept temperature, add calcium stearate under normal pressure and mix for 1 h, the quality of calcium stearate is 0.1% of the total mass of the above-mentioned PET bottle flakes and PET filaments, and the moisture content of the obtained PET mixture is 108 ± 10ppm. The above PET mixture is melt-extruded by a screw, sprayed through a spinneret, spun, and wound to obtain as-spun filaments. After balancing, it is stretched, crimped, relaxed and heat-set to obtain polyester fibers. The melt temperature of the melt extrusion is 278±2°C, melt viscosity 0.55dl / g, spinning ring blowing temperature 18°C, wind speed 0.8m / s, filament room temperature 30°C, winding speed 1137m / min, spinneret stretch The ratio is 145, the spinning density of primary yarn is 9-10dtex, the oil content is 20%, the stretchin...

Embodiment 2

[0018] The recovered PET bottle flakes (viscosity 0.75dl / g, melting point 245°C) and PET silk (viscosity 0.65dl / g, melting point 262°C) were mixed evenly and vacuum-dried at 150°C, then kept temperature, add calcium stearate under normal pressure and mix for 1 hour, the quality of calcium stearate is 0.2% of the total mass of the above-mentioned PET bottle flakes and PET filaments, and the moisture content of the obtained PET mixture is 108 ± 10ppm. The above PET mixture is melt-extruded by a screw, sprayed through a spinneret, spun, and wound to obtain as-spun filaments. After balancing, it is stretched, crimped, relaxed and heat-set to obtain polyester fibers. The melt temperature of the melt extrusion is 285°C, melt viscosity of 0.55dl / g, spinning ring blowing temperature of 16°C, wind speed of 1.2m / s, filament chamber temperature of 28°C, winding speed of 1140m / min, spinneret draw ratio of 143. The primary yarn obtained by spinning has a linear density of 9-10dtex, an oil ...

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Abstract

The invention relates to a production method of polyster fiber, which can be used for producing polyster fiber with the thermal shrinkage of over 50 percent and low cost. The production method of polyster fiber comprises the steps of: drying a PET raw material until the water content is below 120ppm and fusing and extruding by a screw; spraying spinning yarns by a spinneret and coiling to obtain primary yearns; balancing, and then stretching, coiling and carrying out slack hot setting to obtain the polyster fiber, wherein the temperature of the fused and extruded melt is 275-285 DEG C, the melt viscosity is 0.52-0.58dl / g, the annular air blowing temperature of the spinning yarns is 15-20 DEG C, the wind speed is 0.8-1.2m / s, the temperature of a yarn chamber is 25-30 DEG C, the stretching ratio of a spinning jet is 140-148 times, the density of the spun primary yarns is 9-10dtex, the stretching temperature is 25-35 DEG C, the stretching ratio is 2.6-3.2, the slack hot setting temperature is 50-70 DEG C, and the melting point of a preferable PET raw material is 250-260 DEG C.

Description

technical field [0001] The invention relates to a production method of polyester fiber. Background technique [0002] In recent years, with the development and utilization of superfine fibers, new synthetic fibers and new synthetic fibers and their fabrics, the use and demand of high shrinkage fibers are increasing. The blended yarn of high-shrinkage polyester fiber and ordinary fiber can make use of the difference in filament length caused by the difference in heat shrinkage, which can give the fabric a fluffy, plump, soft style, and has a wooly feel, and is used for processing high-end clothing fabrics. The shrinkage rate of conventional polyester PET fiber is below 7%. [0003] The preparation methods of high-shrinkage polyester fibers usually include three methods: physical modification, chemical modification and combination of chemical-physical modification. The physical modification method mainly improves the degree of orientation of macromolecules and reduces the de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/92D01D5/088D01D5/098D01D10/02
Inventor 张俊华金根兴朱建新谈文明
Owner JIANGSU JIANGNAN HIGH POLYMER FIBER