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Dyeing process of regenerated polyester

A recycled polyester and process technology, applied in the field of textile printing and dyeing, can solve the problems of low strength, unstable dyeing shade, and poor color fastness of recycled polyester fabrics

Active Publication Date: 2020-06-05
PACIFIC (PANYU) TEXTILES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the object of the present invention is to provide a dyeing process of regenerated polyester, which solves the defect of unstable dyeing shade caused by a lot of knitting oil on the surface of regenerated polyester fabric, and adopts acidic dyeing solution Dyeing, and adopting different temperature programs for different shades of dyes, solves the problems of low strength and poor color fastness of recycled polyester fabrics

Method used

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  • Dyeing process of regenerated polyester
  • Dyeing process of regenerated polyester
  • Dyeing process of regenerated polyester

Examples

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Effect test

Embodiment 1

[0075] The present embodiment provides a dyeing process of light beige (light-colored) regenerated polyester, characterized in that the dyeing process comprises the following steps:

[0076] (1) High-temperature pre-setting: Pre-setting the recycled polyester fabric at 185°C for 35 seconds;

[0077] (2) Pre-treatment degreasing: Use 2g / L degreaser LYS to degrease the pre-set recycled polyester fabric in step (1) at 70°C for 15 minutes;

[0078] (3) Dyeing: Put the regenerated polyester fabric after the pre-treatment and degreasing in step (2) in the dyeing vat, add water to soak it according to the bath ratio of 1:10, add softener CN, swelling agent D, 3 / 4 leveling agent P and buffer solution (glacial acetic acid and sodium acetate), then heat up to 50°C at a rate of 3°C / min, then add the remaining 1 / 4 leveling agent P and dyes to the dye vat and mix evenly, then Carry out segmental heating dyeing, the specific heating process of the dyeing is: add the dye solution at a temp...

Embodiment 2

[0085] The difference from Example 1 is only that the mass concentration of the leveling agent in the dye liquor is 0.5g / L, and the others are the same as in Example 1.

Embodiment 3

[0087] The difference from Example 1 is that the mass concentration of the leveling agent in the dye liquor is 1.0 g / L, and the others are the same as in Example 1.

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Abstract

The invention provides a dyeing process of regenerated polyester. The dyeing process is characterized by comprising the following steps of (1) performing high-temperature presetting: performing high-temperature presetting on regenerated polyester fabric; (2) performing pretreatment oil removal: performing oil removal treatment on the regenerated polyester fabric subjected to presetting in step (1)by utilizing an oil removal agent; (3) performing dyeing: dyeing the regenerated polyester fabric subjected to pretreatment oil removal in step (2) in dye liquor; (4) performing cleaning: introducingwater into the dye liquor subjected to dyeing in step (3), and performing cooling and cleaning the dyed regenerated polyester fabric; and (5) performing setting: setting the regenerated polyester fabric cleaned in step (4). According to the dyeing process of the regenerated polyester, the defect that the dyeing color light is unstable due to excessive knitting oil on the surface of the regenerated polyester fabric is overcome, and the problems that the regenerated polyester fabric is low in strength and poor in color fastness are solved.

Description

technical field [0001] The invention belongs to the technical field of textile printing and dyeing, and relates to a dyeing process of recycled polyester. Background technique [0002] Recycled polyester (Recycle Polyester) refers to the polyester fiber made from waste polyester bottle flakes, crushed, cleaned, and then melt-spun. It belongs to the full use of renewable resources, which can reduce the pollution of waste to the environment and effectively reduce the emission of carbon dioxide. It saves nearly 80% of energy compared with the conventional process of producing polyester fiber. It is a more environmentally friendly polyester fiber, which is gradually recognized by the market. Broad development prospects. Some international well-known brands have also chosen recycled polyester fibers as raw materials to develop new products for promotion. However, recycled polyester has a high oil content and high rigidity, and its strength and heat resistance are not as good as...

Claims

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Application Information

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IPC IPC(8): D06P1/39D06P1/44D06P1/653D06P3/52D06P5/02
CPCD06P1/39D06P3/521D06P5/02D06P1/445D06P1/6533
Inventor 张贵王凯蓉王思捷付永津皮建兵李明辉李成炳邓昱郑锋黄至新
Owner PACIFIC (PANYU) TEXTILES LTD
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