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Method for darkly dyeing PLA (polylactic acid) filament yarn fabrics

A filament fabric, dark color technology, applied in the field of textile printing and dyeing, can solve the problems that affect the normal use and application range of PLA products, PLA filament fabrics cannot be dyed in dark colors, PLA fibers are acid-resistant and alkali-resistant, etc., to improve dyeing performance And deep color, good dyeing effect, and the effect of improving the problem of dark dyeing

Active Publication Date: 2012-05-30
CHINA TEXTILE ACAD JIANGNAN BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PLA fiber is acid-resistant and alkali-resistant and has a low melting point. Therefore, PLA cannot be treated with strong alkali and the dyeing temperature cannot be high.
Therefore, the general dyeing and washing process is not suitable for PLA dyeing, which brings great difficulties to PLA dyeing dark colors.
It is precisely because of the limitations of PLA dyeing that it directly affects the normal use and application range of PLA products.
[0003] Based on this, the purpose of the present invention is to carry out in-depth research on PLA dyeing, especially the problem that PLA filament fabrics commonly faced at present cannot be dyed dark, and provide an effective solution

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Method for darkly dyeing PLA (polylactic acid) filament yarn fabrics
  • Method for darkly dyeing PLA (polylactic acid) filament yarn fabrics
  • Method for darkly dyeing PLA (polylactic acid) filament yarn fabrics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The PLA filament fabric was treated with low-temperature plasma in a low-temperature plasma equipment. The treatment conditions were: power 60W, time 60S, and the treatment atmosphere was air. The treated PLA filament fabric was dyed with Dianix (Blue) XF. Dyeing conditions: dye 1% (o.w.f), diffusing agent NNO 1g / L, bath ratio 1:30, adjust the pH value to 4-5 with acetic acid, the dyeing process is as follows figure 1 Shown: press figure 1 After dyeing with the shown heating curve, washing with water, reducing washing, washing with water and drying.

[0026] The PLA filament fabric dyed in Example 1 and the PLA filament fabric treated by conventional dyeing process were tested for dye uptake and k / s value. The test results showed that the dye uptake of PLA filament fabric without plasma treatment was 46.7%, k / s value is 3.12, the dye uptake rate of PLA filament fabric treated by plasma is 58.9%, k / s is 4.23, dye uptake rate and k / s growth rate are 26.12% and 35.58%, respect...

Embodiment 2

[0028] The PLA filament fabric was treated with low-temperature plasma in a low-temperature plasma equipment. The treatment conditions were: power 100W, time 100S, and the treatment atmosphere was air. The treated PLA filament fabric was dyed with Dianix (Blue) XF. Dyeing conditions: dye 1% (o.w.f), diffusing agent NNO 1g / L, bath ratio 1:30, adjust the pH value to 4-5 with acetic acid, the dyeing process is as follows figure 2 Shown: press figure 2 After dyeing with the shown heating curve, washing with water, reducing washing, washing with water and drying.

[0029] The PLA filament fabric dyed in Example 2 and the PLA filament fabric treated by the conventional dyeing process were tested for dye uptake and k / s value. The test results showed that the dye uptake of PLA filament fabric treated by plasma 64.1%, k / s was 5.23, dye uptake rate and k / s growth rate were 37.26% and 67.63%, respectively.

Embodiment 3

[0031] Low-temperature plasma treatment was performed on the PLA filament fabric in a low-temperature plasma equipment. The treatment conditions were: power 100W, time 100S, and treatment atmosphere as air. The treated PLA filament fabric was immersed in 30% acrylic acid solution for 60 minutes. The PLA filament fabric was then dyed with Dianix (Blue) XF. Dyeing conditions: dye 1% (o.w.f), diffusing agent NNO 1g / L, bath ratio 1:30, adjust the pH value to 4-5 with acetic acid, the dyeing process is as follows image 3 Shown: press image 3 After dyeing with the shown heating curve, washing with water, reducing washing, washing with water and drying.

[0032] The PLA filament fabric dyed in Example 3 and the PLA filament fabric treated by conventional dyeing process were tested for dye uptake and k / s value. The test results showed that the dye uptake of PLA filament fabric treated by plasma was 72.1%, k / s was 6.32, dye uptake rate and k / s growth rate were 54.39% and 103.56%, respec...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a method for darkly dyeing PLA filament yarn fabrics, which belongs to weaving printing and dyeing industry and comprises the following steps: carrying out low-temperature plasma treatment on the PLA filament yarn fabrics in low-temperature plasma equipment, wherein the treatment conditions are shown as follows: power is 20W-100W, time is 10S-100S, and treatment atmosphereis air; soaking the treated PLA filament yarn fabrics in a crylic acid solution the weight percent is 10-50 percent for 30-200 min; and then dyeing the PLA filament yarn fabrics with dispersed dyes at the temperature of 100 DEG C for 40 min to achieve dye uptake balance. In the invention, the plasma treatment is adopted to carry out physical and chemical modification on the surfaces of the PLA filament yarn fabrics to realize the constant-pressure low-pressure dyeing of the dispersed dyes on the PLA filament yarn fabrics, and the deep dyeing property is greatly improved.

Description

Technical field: [0001] The invention belongs to the textile printing and dyeing industry and relates to a dyeing and finishing process for dyeing dark colors of PLA filament fabrics. technical background: [0002] PLA is a fiber made from starch-containing raw materials such as corn and wheat, which are converted into lactic acid by fermentation, and then polymerized and spun. PLA is one of the excellent green textile materials. It has good physical and mechanical properties, thermal stability, and thermoplasticity, softer, lighter, good dyeability, and biocompatibility, so it has a wide range of uses. PLA is a polyester fiber and is generally dyed with disperse dyes. However, PLA fiber is acid and alkali resistant and has a low melting point, so PLA cannot be treated with strong alkali and the dyeing temperature cannot be high. Therefore, the general dyeing and polyester technology is not suitable for dyeing PLA, which brings great difficulties to the dark dyeing of PLA. It ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M10/06D06P3/54D06M14/32
Inventor 庄小雄吴乾元郑小佳徐憬
Owner CHINA TEXTILE ACAD JIANGNAN BRANCH
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