Production process for coloured polyester staple fibre

A production process, colored polyester technology, applied in the direction of fiber treatment, fiber chemical characteristics, single-component polyester rayon, etc., can solve the problem that the linear density, color fastness and hand feel of polyester staple fiber cannot achieve the desired effect, and recycled PET The production process is limited by conditions, and the quality of recycled PET materials is uneven, etc., so as to achieve the effect of smooth hand feeling, favorable environmental protection and environmental protection

Inactive Publication Date: 2012-06-27
HANGZHOU BEST CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the uneven quality of recycled PET materials, their intrinsic viscosity and melting point are very different from those of polyester chips processed from raw materials, and they also contain more non-polyester plastic impurities and moisture, resulting in poor spinning quality. Serious impact
[0004] The color masterbatch is obtained by mixing, melting and granulating the colorant, carrier and dispersant. The addition of the color masterbatch during spinning will change the viscosity of the melt in the spinning assembly and cause friction to the equipment. Conventional recycled PET production The process is limited by conditions, and the obtained polyester staple fiber cannot achieve the desired effect in linear density, color fastness and hand feeling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The production technique of colored polyester staple fiber of the present invention adopts recycled PET material as raw material, and concrete steps are as follows:

[0043] (1) Pre-treatment: The recovered recycled PET material is washed with lye in sequence, decontaminated by de-alkali liquid in the centrifuge, automatically removed by the floating material separator, discharged from the ribbon washing machine, rinsed by the spray washing machine and then extracted. Pretreatment of material, centrifuge dehydration, conveyor belt delivery to pick table, pick table for manual material picking, pick out impurities, and then weigh and pack;

[0044] (2) Drum drying: first dry the processed recycled PET material with a vacuum drum dryer for 8.5 hours, then add polyester masterbatch from Suzhou Baoli Plastic Materials Co., Ltd., the final mass fraction of the masterbatch is 5 %, and then add toner, the total drying time is 10h, and the drying is completed when the measured ...

Embodiment 2

[0056] The production technique of colored polyester staple fiber of the present invention adopts recycled PET material as raw material, and concrete steps are as follows:

[0057] (1) Pre-treatment: The recovered recycled PET material is washed with lye in sequence, decontaminated by de-alkali liquid in the centrifuge, automatically removed by the floating material separator, discharged from the ribbon washing machine, rinsed by the spray washing machine and then extracted. Pretreatment of material, centrifuge dehydration, conveyor belt delivery to pick table, pick table for manual material picking, pick out impurities, and then weigh and pack;

[0058] (2) Drum drying: first dry the treated regenerated PET material with a vacuum drum dryer for 8 hours, and then add polyester color masterbatch from Suzhou Baoli Plastic Materials Co., Ltd., the final mass fraction of the color masterbatch is 3%. , and then add toner, the total drying time is 10h, and the measured water content...

Embodiment 3

[0070] The production technique of colored polyester staple fiber of the present invention adopts recycled PET material as raw material, and concrete steps are as follows:

[0071] (1) Pre-treatment: The recovered recycled PET material is washed with lye in sequence, decontaminated by de-alkali liquid in the centrifuge, automatically removed by the floating material separator, discharged from the ribbon washing machine, rinsed by the spray washing machine and then extracted. Pretreatment of material, centrifuge dehydration, conveyor belt delivery to pick table, pick table for manual material picking, pick out impurities, and then weigh and pack;

[0072] (2) Drum drying: first dry the treated regenerated PET material with a vacuum drum dryer for 7.5 hours, then add polyester masterbatch from Suzhou Baoli Plastic Materials Co., Ltd., the final mass fraction of the masterbatch is 7 %, and then add toner, the total drying time is 9.5h, and the drying is completed when the measure...

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Abstract

The invention discloses a production process for coloured polyester staple fibre. In the production process, regenerative PET (Polyethylene Terephthalate) material is used as the raw material, and the finished product is acquired by pre-treating, rotary drum drying, melt spinning, cooling forming, winding, drafting, curling, oil applying, thermosetting and cutting-off in sequence, wherein the rotary drum drying comprises the steps of firstly drying the regenerative PET material for 7.5h-8.5h and then adding master batches with the final mass fraction of 2%-10%, and toner; the total drying time is 9.5h-10.5h; both the screw rod and the spinning beam of a screw extruder in the melt spinning step are at the temperature from 265 DEG C to 275 DEG C; spinneret plates are provided with 3500 bores having the diameter of 0.2mm and are arranged in 14 circles; cooling forming is realized through circular air blow, the temperature of the circular air is 22 DEG C to 26 DEG C, and the velocity of the circular air is 4.0m/s to 5.0m/s; the total draft multiple is 3.0-3.2 times; and the thermosetting temperature is 168 DEG C to 172 DEG C, and the thermosetting time is 13 minutes to 17 minutes. Theproduction process can save the cost and is helpful for environmental protection; the produced product has smaller linear density, higher colour fastness and smooth and comfortable hand feeling.

Description

technical field [0001] The invention relates to a production process of polyester fiber, in particular to a production process of colored polyester staple fiber. Background technique [0002] The conventional production process generally uses disperse dyes to dye polyester staple fibers, which needs to be carried out under high temperature and high pressure or in the presence of carriers, which will cause great damage to the fibers, poor color fastness, and a narrow dyeing chromatogram range. [0003] At present, colored polyester staple fibers are used to replace ordinary polyester staple fibers for fabric production. The colored polyester staple fibers are generally processed and spun from raw materials, melted and mixed with color masterbatch, and the cost is high; waste PET is also used. (i.e. polyethylene terephthalate) bottle flakes, sheets, films and polyester materials produced in the production process of polyester blocks, waste silk and other recycled PET materials...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/02D01D5/08D01D5/088D01D5/096D01D5/16D01D10/02
Inventor 魏燕琼於俊杰邵建农丁益萍徐红波李明刚孙志超王莉君
Owner HANGZHOU BEST CHEM FIBER
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