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Energy-saving dyeing and finishing method for thin cotton spandex knitted fabric

A technology for knitted fabrics and knitted fabrics, which is applied in the fields of dyeing, fiber types, textiles and papermaking, etc., which can solve the problems of large energy consumption, pollutant discharge, inconformity with energy saving and environmental protection, and complicated mercerizing and singeing processes. Reduce gray cloth strength damage, good dyeing levelness and reproducibility, and avoid local damage to gray cloth strength

Active Publication Date: 2020-10-02
ZHEJIANG YINHE PRINTING & DYEING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to overcome the dyeing and finishing process of thin cotton spandex knitted fabrics in the prior art, which tends to cause local yellowing and brittleness of the cloth surface, resulting in local damage to the strength of gray fabrics; Acid hair removal can easily lead to a significant drop in bursting strength after dyeing, which cannot meet the requirements for use. However, the mercerized singeing process is complicated, energy consumption and pollutant emissions are large, which does not meet the requirements of energy saving and environmental protection, and there is a problem of high dyeing costs. Provide An energy-saving dyeing and finishing method for thin cotton-spandex knitted fabrics. Firstly, light mercerizing is carried out on gray fabrics, and then pre-setting is carried out, and then the hair is removed by dyeing in the same bath. High bursting strength, energy saving and environmental protection in the dyeing and finishing process, reducing the cost of dyeing and finishing

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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  • Energy-saving dyeing and finishing method for thin cotton spandex knitted fabric

Examples

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Effect test

Embodiment 1

[0040] A method for dyeing and finishing thin cotton spandex knitted fabrics in blue color with energy saving, comprising the following steps:

[0041] (1) Mild mercerizing: add 150g / m 2 The thin all-cotton spandex knitted fabric gray fabric is soaked with liquid alkali in the liquid mandrel using a dipping and rolling process, and then the flat spoke enters the buffer tank for 55 seconds. The liquid alkali used is NaOH solution with a mass concentration of 30%. The amount used is 20% of the total mass of the thin cotton spandex knitted fabric; the process parameters for light mercerization are: rolling pressure 0.4Mpa, rolling rate 85%, and speed of liquid squeezer 19m / min;

[0042] (2) Washing: Put the lightly mercerized gray cloth into a six-tank step-type low-tension open-width washing machine for washing. The temperature of each washing tank is 40°C, and glacial acetic acid is added intermittently in the third tank;

[0043] (3) Pre-setting: the washed gray cloth enters ...

Embodiment 2

[0056] A method for dyeing and finishing thin cotton spandex knitted fabrics in blue color with energy saving, comprising the following steps:

[0057] (1) Mild mercerizing: add 150g / m 2 The thin all-cotton spandex knitted fabric gray fabric is soaked with liquid alkali in the liquid mandrel by one dipping and one rolling process, and then the flat spoke enters the buffer tank for 50 seconds. The liquid alkali used is NaOH solution with a mass concentration of 35%. The amount used is 25% of the total mass of the thin cotton spandex knitted fabric; the process parameters for light mercerization are: rolling rod pressure 0.35Mpa, excess rolling rate 90%, speed of liquid manipulator 18m / min;

[0058] (2) Washing: Put the lightly mercerized gray cloth into a six-tank step-type low-tension open-width washing machine for washing. The temperature of each washing tank is 40°C, and glacial acetic acid is added intermittently in the third tank;

[0059] (3) Pre-setting: the washed gray...

Embodiment 3

[0072] A method for dyeing and finishing thin cotton spandex knitted fabrics in blue color with energy saving, comprising the following steps:

[0073] (1) Mild mercerizing: add 150g / m 2 The thin all-cotton spandex knitted fabric gray cloth is soaked with liquid alkali in the liquid mandrel by one dipping and one rolling process, and then the flat spoke enters the buffer tank for 60 seconds. The liquid alkali used is NaOH solution with a mass concentration of 25%. The amount used is 25% of the total mass of the thin cotton spandex knitted fabric; the process parameters for light mercerization are: rolling rod pressure 0.45Mpa, excess rolling rate 80%, and liquid squeezer speed 20m / min;

[0074] (2) Washing: Put the lightly mercerized gray cloth into a six-tank step-type low-tension open-width washing machine for washing. The temperature of each washing tank is 40°C, and glacial acetic acid is added intermittently in the third tank;

[0075] (3) Pre-setting: the washed gray cl...

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 an energy-saving dyeing and finishing method for a thin cotton spandex knitted fabric. The energy-saving dyeing and finishing method comprises the following steps: firstly, mildly mercerizing; secondly, washing with water; thirdly, presetting; fourthly, bleaching the bottom; fifthly, dyeing cotton: first adding cellulase at the temperature of 55 to 60 DEG C; adding dyes inthe 15th to 25th minutes; adding anhydrous sodium sulphate in the 20th to 30th minutes, and maintaining the temperature for 15 to 25 minutes; adding sodium carbonate in the 40th to 50th minutes; raising the temperature to 60 to 65 DEG C, and maintaining the temperature for 25 to 35 minutes; draining, cleaning, then adding glacial acetic acid for acid pickling, and keeping the temperature for 10 to20 minutes; changing water once, adding an active soaping agent, raising the temperature to 90 to 95 DEG C, keeping the temperature for 15 to 25 minutes, cleaning with clear water and discharging thefabric out of a vat; sixthly, softening, fixing color and dehydrating; and seventhly, drying and setting. According to the energy-saving dyeing and finishing method disclosed by the invention, a grayfabric is first mildly mercerized, preset and dyed, and is subjected to one-bath and wool removal, so that the gray fabric reaches higher bursting strength while the smoothness of a fabric cover is met, and the dyeing and finishing cost is reduced.

Description

technical field [0001] The invention relates to the technical field of dyeing processing, in particular to an energy-saving dyeing and finishing method for thin cotton spandex knitted fabrics. Background technique [0002] The weight of thin cotton spandex knitted fabric is less than 150 grams, and the content of spandex filament is between 3 and 6%. Customers usually require that the dyed fabric has a smooth surface and high bursting strength (above 200N). For thin cotton spandex knitted fabrics, the conventional dyeing method is to set the base first, then bleach the bottom, then acid or neutral hair removal, and finally dye with reactive dyes. [0003] However, this process first carries out high-temperature billet setting, and the weaving oil stains remaining on the gray cloth can easily lead to local yellowing and brittleness of the cloth surface under high temperature, resulting in local damage to the strength of the gray cloth, and the cloth surface is yellowish and 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): D06M11/38D06B3/10D06B7/00D06L4/13D06L4/12D06P1/46D06P1/38D06P5/08D06P5/02D06M101/06D06M101/38
CPCD06M11/38D06B3/10D06B7/00D06L4/13D06L4/12D06P1/46D06P1/38D06P5/08D06P5/02D06M2101/06D06M2101/38
Inventor 王燕丰
Owner ZHEJIANG YINHE PRINTING & DYEING
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