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Reduced dye dyeing and finishing process for ramie fabric

A fabric and ramie technology, applied in the field of vat dye dyeing and finishing process, can solve problems such as rough hand feel, difficult handling, itch and shrinkage rate, etc., to improve strength and appearance flatness, improve the ability to absorb dyes, and increase size The effect of stability

Active Publication Date: 2016-12-07
ANHUI YAYUAN PRINTING & DYEING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because natural ramie fibers contain impurities such as pectin, lignin, wax and ash, the breaking strength is high, the wet strength is high, and the breaking elongation is low, that is, the pretreatment of fabrics with ramie as components is difficult and requires High, if it is not handled properly, there are disadvantages such as rough hand feeling, easy to wrinkle, poor elasticity, itchy feeling when worn next to the skin, and large shrinkage rate; at the same time, it is difficult to dye ramie fabrics during the dyeing process, and the color fixation rate is also low. The color brightness is also relatively poor, which seriously restricts the use of ramie fabrics

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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  • Reduced dye dyeing and finishing process for ramie fabric
  • Reduced dye dyeing and finishing process for ramie fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A vat dyeing and finishing process for ramie fabrics, comprising the steps:

[0023] S1, pre-treatment, padding the ramie fabric at 60°C with a working solution, the bath ratio is 1:35, two dipping and two rolling, the excess rate is 90%, the working solution includes: scouring agent 3g / L, hydrogen peroxide 5g / L, desizing enzyme 6g / L, cellulase 0.5g / L, penetrant 3g / L, urea 1g / L, steam at 105°C for 20min, hot wash at 95°C, cold wash, dry, Carry out pre-setting again, add 8g / L of heat-resistant yellowing agent, the pre-setting temperature is 165°C, and the vehicle speed is 15m / min;

[0024] S2, finishing and modification, the ramie fabric after the pretreatment of S1 is dipped and rolled in the finishing solution at 45°C, the bath ratio is 1:30, two dipping and two rolling, the finishing solution includes: β-cyclodextrin 5g / L , polycarboxylic acid 15g / L, sodium hypophosphite 0.5g / L, pre-bake at 100°C for 2min, then bake at 140°C for 1min, wash with water at 85°C and dry...

Embodiment 2

[0028] A vat dyeing and finishing process for ramie fabrics, comprising the steps:

[0029] S1, pre-treatment, padding the ramie fabric at 70°C with a working solution, the bath ratio is 1:25, two dipping and two rolling, the excess rate is 110%, and the working solution includes: scouring agent 1g / L, hydrogen peroxide 8g / L, desizing enzyme BF-76584g / L, cellulase 1g / L, penetrant 1g / L, urea 3g / L, steam at 100°C for 30min, hot wash at 90°C, cold wash, dry , and then carry out pre-setting, add 10g / L heat-resistant yellowing agent, the pre-setting temperature is 155°C, and the vehicle speed is 25m / min;

[0030] S2, finishing and modification, padding the ramie fabric after the pretreatment of S1 at 55°C with a bath ratio of 1:20, two dipping and two rolling, the finishing solution includes: β-cyclodextrin 10g / L , polycarboxylic acid 5g / L, sodium hypophosphite 2g / L, triethanolamine 0.5g / L, sodium chloride 5g / L, pre-bake at 90°C for 4min, then bake at 120°C for 5min, wash with wat...

Embodiment 3

[0034] A vat dyeing and finishing process for ramie fabrics, comprising the steps:

[0035] S1, pre-treatment, padding the ramie fabric at 65°C with a working solution, the bath ratio is 1:30, two dipping and two rolling, the excess rate is 100%, the working solution includes: scouring agent 2g / L, hydrogen peroxide 6g / L, desizing enzyme BF-76585g / L, cellulase 0.7g / L, penetrant 2g / L, urea 2g / L, steam at 102°C for 25min, hot wash at 92°C, cold wash, dry Dry, then carry out pre-setting, add 9g / L heat-resistant yellowing agent, pre-setting temperature is 160°C, and the speed is 20m / min;

[0036] S2, finishing and modification, the ramie fabric after the pretreatment of S1 is dipped and rolled in the finishing solution at 50°C, the bath ratio is 1:25, two dipping and two rolling, the finishing solution includes: β-cyclodextrin 7g / L , polycarboxylic acid 10g / L, sodium hypophosphite 1g / L, triethanolamine 0.7g / L, sodium chloride 3g / L, pre-bake at 95°C for 3min, then bake at 130°C fo...

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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PUM

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Abstract

The invention discloses a reduced dye dyeing and finishing process for a ramie fabric. The process comprises the following steps of S1, pre-treatment: after work liquid padding on the ramie fabric, performing stacking steaming, hot washing, cold washing and drying, and then performing pre-shaping; S2, finishing and modification: performing finishing liquid padding, wherein the finishing liquid is prepared from 5 to 10g / L of beta-cyclodextrin, 5 to 15g / L of polybasic carboxylic acid and 0.5 to 2g / L of sodium hypophosphite; performing pre-baking, baking, water washing and drying; S3, reduction and dyeing: padding the ramie fabrics into dye liquid formed by reduction dye; then, padding into reducing liquid; using saturated vapor for fast steaming; after the water washing, performing oxidization by hydrogen peroxide; performing soaping and hot washing, and then drying; S4, post-treatment: sequentially performing softening finishing and inflaming retarding finishing on the ramie fabric. According to the invention, the reduced dye dyeing and finishing process for the ramie fabric has the advantages that the properties such as hand feel and elasticity of the fabric are obviously improved; in addition, the dyeing is uniform; the color fastness is high; the color and luster are rich.

Description

technical field [0001] The invention relates to the technical field of dyeing and finishing, in particular to a vat dye dyeing and finishing process for ramie fabrics. Background technique [0002] As we all know, the main component of ramie is cellulose fiber. Because there is a groove-like cavity in the middle of the fiber, the tube wall is porous, and is slender, tough, light in texture, and fast in moisture absorption and moisture dissipation, so the air permeability is about three times higher than that of cotton fiber. Ramie fiber contains elements such as urgency, pyrimidine, and purine, which have varying degrees of inhibitory effects on Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli. , is an excellent textile raw material. However, because natural ramie fibers contain impurities such as pectin, lignin, wax and ash, the breaking strength is high, the wet strength is high, and the breaking elongation is low, that is, the pretreatment of fabrics w...

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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IPC IPC(8): D06P1/22D06P1/673D06P1/48D06P3/60D06P5/02D06M16/00D06M15/647D06M13/463D06M11/79D06M13/144D06M13/432D06L3/02D06L1/14D06M101/06
CPCD06L1/14D06M11/79D06M13/144D06M13/432D06M13/463D06M15/647D06M16/003D06M2101/06D06M2200/30D06M2200/50D06P1/22D06P1/48D06P1/6735D06P1/67375D06P3/6025D06P5/02
Inventor 潘学东
Owner ANHUI YAYUAN PRINTING & DYEING CO LTD
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