Regenerated polyester staple fiber and preparation method thereof

A technology of recycled polyester and staple fiber, applied in the field of recycled polyester, can solve problems such as environmental damage, pollution, and impact on economic results, and achieve the effects of reducing dry heat shrinkage, good overall performance, and improving spinnability

Inactive Publication Date: 2017-06-13
湖北泰峰实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the late 20th century, with the development of the petrochemical industry, many daily necessities were replaced by polymer products. However, these plastics, chemical fibers and other products are not easy to degrade after being discarded. After long-term accumulation, white pollution floods and the environment is severely damaged.
According to estimates, the current total social stock of waste polyester materials is close to 400 million tons. Uncontrolled waste has caused a great waste of resources and pollution. The losses caused by environmental pollution and ecological damage have accounted for 15% of my country's total GDP. Environmental issues not only affect existing economic results, but also affect sustainable development

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The recycled polyester staple fiber provided in this embodiment is prepared by the following steps:

[0020] Step 1. After sorting, removing labels, and pre-cleaning the recycled polyester bottles, they are broken into PET chips, and then the PET chips are saturated and dried for 12 hours at a temperature of 152°C and a vacuum degree greater than 0.098MPa;

[0021] Step 2: Add 0.11wt‰ of whitening powder, 0.55wt‰ of zinc oxide powder, and 3.5wt% of polyester chain extender to the PET chips dried in step 1, and mix them evenly at a temperature of 270°C and a pressure of 3.5MPa, Spinning at a spinning speed of 1100m / min to obtain a nascent fiber tow, and then air-dry the nascent fiber tow at a wind speed of 0.65m / s and an air temperature of 23°C;

[0022] Step 3. The air-dried nascent fiber tow in step 2 is immersed in a compound oil at a temperature of 75°C and a concentration of 3.3% by weight, and then enters a draft roll, two draft rolls, and three drafts in sequence Roller...

Embodiment 2

[0026] The recycled polyester staple fiber provided in this embodiment is prepared by the following steps:

[0027] Step 1. After sorting, removing labels, and pre-cleaning the recycled polyester bottles, they are broken into PET chips, and then the prepared PET chips are saturated and dried for 14 hours at a temperature of 155°C and a vacuum degree greater than 0.098MPa;

[0028] Step 2: Add 0.14wt‰ of whitening powder, 0.75wt‰ of zinc oxide powder, and 4.5wt% of polyester chain extender to the PET chips dried in step 1, and mix them evenly at a temperature of 275°C and a pressure of 4.5MPa, Spinning at a spinning speed of 1150m / min to obtain nascent fiber tows, and then air-drying the nascent fiber tows at a wind speed of 0.75m / s and an air temperature of 24°C;

[0029] Step 3. The air-dried nascent fiber tow in step 2 is immersed in a compound oil at a temperature of 75°C and a concentration of 4.3 wt%, and then enters a drafting roll, two drafting rolls and three drafting success...

Embodiment 3

[0033] The recycled polyester staple fiber provided in this embodiment is prepared by the following steps:

[0034] Step 1: After sorting, removing labels, and pre-cleaning the recycled polyester bottles, they are broken into PET chips, and then the prepared PET chips are saturated and dried for 13.5 hours at a temperature of 158°C and a vacuum degree greater than 0.098MPa;

[0035] Step 2: Add 0.14wt‰ of whitening powder, 0.75wt‰ of zinc oxide powder, and 4.5wt% of polyester chain extender to the PET chips dried in step 1, and mix them evenly at a temperature of 275°C and a pressure of 5.5MPa, Spinning at a spinning speed of 1500m / min to obtain nascent fiber tows, and then air-drying the nascent fiber tows at a wind speed of 0.8m / s and an air temperature of 26℃;

[0036] Step 3. The air-dried nascent fiber tow in step 2 is immersed in a compound oil at a temperature of 75°C and a concentration of 4 wt%, and then enters a drafting roll, two drafting rolls and three drafting rolls in ...

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PUM

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Abstract

The invention relates to a regenerated polyester staple fiber and a preparation method thereof. The preparation method mainly comprises the following steps of sorting recycled polyester bottles, removing tags, primarily cleaning, and crushing into PET (polyethylene terephthalate) slices; drying the PET slices, adding 0.01 to 0.015wt% of whitening powder, 0.05 to 0.09wt% of zinc oxide powder and 3 to 5wt% of polyester chain extender; melting, blending, spinning, drawing, drying and shaping. The regenerated polyester staple fiber and the preparation method thereof have the advantages that by controlling the technology conditions of temperature, time and the like in the processing and manufacturing process, and using the polyester chain extender, the dry heat shrinkage rate of the polyester staple fiber is reduced; the comprehensive property of the regenerated polyester staple fiber is better, and the spinning property of the regenerated polyester is effectively improved.

Description

Technical field [0001] The invention relates to a regenerated polyester fiber, in particular to a regenerated polyester staple fiber and a preparation method thereof. Background technique [0002] In the late 20th century, with the development of the petrochemical industry, many daily necessities were replaced by polymer products. However, these plastics, chemical fibers and other products are not easily degraded after being discarded. After long-term accumulation, white pollution will overflow and the environment will be severely damaged. In 2014, China's total chemical fiber output reached 43,897,500 tons, accounting for more than 70 in the world, and the output of polyester accounted for about 80% of the total chemical fiber output. Therefore, the waste pollution problem associated with the huge output has become increasingly severe. According to estimates, the current total social stock of waste polyester materials is close to 400 million tons. Uncontrolled waste has caused g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/26D01F6/92D01F1/10D01D5/16
CPCD01D5/26D01D5/16D01F1/10D01F6/92
Inventor 杨凡
Owner 湖北泰峰实业有限公司
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