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One-bath two-step dyeing process suitable for polyester-cotton blended fabric

A technology of polyester-cotton blended fabrics, applied in the field of dyeing and finishing, which can solve the problems of long dyeing process, large discharge, and high energy consumption, and achieve the effects of reduced dyeing time, low water consumption, and less waste water

Active Publication Date: 2021-05-25
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problems of long polyester-cotton blended fabric dyeing process, high energy consumption, large discharge and serious pollution in the prior art, and provide a A one-bath two-step dyeing process suitable for polyester-cotton blended fabrics; specifically: dyeing polyester / cotton blended fabrics saves 95% of dyeing water compared with water-bath dyeing, and greatly reduces waste water discharge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A one-bath two-step dyeing process suitable for polyester-cotton blended fabrics, specifically comprising the following steps:

[0043] Raw material preparation: polyester-cotton blended fabric with 50wt% polyester content and 50wt% cotton content, disperse orange 30, ethanol, isooctane, reactive red 195, NaOH;

[0044] (1) Add Disperse Orange 30 and ethanol to isooctane, and stir evenly to form a special dyeing system; wherein, the amount of ethanol is 0.1 times the quality of the polyester component in the polyester-cotton blended fabric, and the amount of Disperse Orange 30 is the polyester-cotton blended fabric. 0.5wt% of the mass of the polyester component, and the amount of isooctane is 15 times the mass of the polyester-cotton blended fabric;

[0045] (2) Add the polyester-cotton blended fabric and the special dyeing system into the dye vat, run it at 20°C for 5 minutes, then raise the temperature to 75°C at a rate of 2°C / min, then raise the temperature to 120°C ...

Embodiment 2

[0068] A one-bath two-step dyeing process suitable for polyester-cotton blended fabrics, specifically comprising the following steps:

[0069] Raw material preparation: polyester-cotton blended fabric with 55wt% polyester content and 45wt% cotton content, disperse blue 79, ethyl benzoate, isooctane, reactive yellow 145, Na 2 CO 3 ;

[0070] (1) Add Disperse Blue 79 and ethyl benzoate to isooctane, stir evenly to form a special dyeing system; wherein, the amount of ethyl benzoate is 0.11 times the quality of the polyester component in polyester-cotton blended fabrics, and Disperse Blue 79 The dosage is 1.2wt% of the polyester component mass in the polyester-cotton blended fabric, and the amount of isooctane is 10 times the mass of the polyester-cotton blended fabric;

[0071] (2) Add the polyester-cotton blended fabric and the special dyeing system into the dye vat, run it at 25°C for 16 minutes, then raise the temperature to 77°C at a rate of 3°C / min, then raise the temperat...

Embodiment 3

[0080]A one-bath two-step dyeing process suitable for polyester-cotton blended fabrics, specifically comprising the following steps:

[0081] Raw material preparation: polyester-cotton blended fabric with a polyester content of 82wt% and a cotton content of 18wt%, Disperse Red 167, acetic acid, paraffin, reactive blue 22, NaOH;

[0082] (1) Add Disperse Red 167 and acetic acid to paraffin, stir evenly to form a special dyeing system; wherein, the amount of acetic acid is 0.14 times the quality of the polyester component in the polyester-cotton blended fabric, and the amount of Disperse Red 167 is the polyester in the polyester-cotton blended fabric 4.7wt% of the component mass, the amount of paraffin is 8 times of the quality of polyester-cotton blended fabric;

[0083] (2) Add the polyester-cotton blended fabric and the special dyeing system into the dye vat, run it at 25°C for 14 minutes, then raise the temperature to 84°C at a rate of 2°C / min, then raise the temperature to ...

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Abstract

The invention relates to a one-bath two-step dyeing process suitable for a polyester-cotton blended fabric. The one-bath two-step dyeing process comprises the following steps of adding the polyester-cotton blended fabric, a disperse dye, a dyeing accelerant and a dyeing medium into a dye vat, dyeing a polyester component in the polyester-cotton blended fabric, cooling after dyeing, adding a reactive dye, an alkaline agent and a small amount of water, dyeing the cotton component in the polyester-cotton blended fabric, and cleaning the floating color on the surface of the polyester component at the same time, wherein the dyeing medium is a non-aqueous dyeing medium with the surface tension of 16-48 mN / m; the mass of a small amount of water means that the mass of water is 1.2-2 times that of cotton components in the polyester-cotton blended fabric, and the fixation rate of the reactive dye reaches 90% or above after the cotton components are dyed; the K / S value of the dyed polyester-cotton blended fabric is 0.5-35, the dye-uptake of the disperse dye is 90% or above, the dye-uptake of the reactive dye is 98% or above, the staining fastness of cotton is level 3 or above, and the staining fastness of polyester is level 3 or above. The dyeing process disclosed by the invention can realize less-alkali, less-water, salt-free and assistant-free dyeing, and is green and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of dyeing and finishing, and relates to a one-bath two-step dyeing process suitable for polyester-cotton blended fabrics. Background technique [0002] With the continuous improvement of human living standards and the development of the textile industry, it has become a common requirement for people to improve the function of fabrics to obtain better hand feeling. Due to the combination of the advantages of different fibers, blended textiles have better wearability and become the development direction of textiles. Polyester / cotton blended fabrics not only have the breathability, moisture absorption, and wearing comfort of cotton fibers, but also have the advantages of good shape retention and wear resistance of polyester fibers, making polyester / cotton blended fabrics enjoy a high reputation among consumers. [0003] In the traditional water bath, polyester / cotton blended fabrics are usually dyed in two bat...

Claims

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Application Information

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IPC IPC(8): D06P1/16D06P1/38D06P3/82
CPCD06P3/8252D06P1/16D06P1/38Y02P70/62
Inventor 裴刘军王际平张红娟
Owner SHANGHAI UNIV OF ENG SCI