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Salt-free dyeing method of cationic modified cotton fabric

A salt-free dyeing technology for cotton fabrics, applied in the field of dyeing, can solve the problems of low dyeing rate and high pollution, and achieve the effect of avoiding environmental pollution and saving reactive dyes

Inactive Publication Date: 2018-06-15
LUOLAI LIFESTYLE TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a salt-free dyeing method for cationic modified cotton fabrics, which is used to solve the problems of low dye uptake and high pollution in the prior art

Method used

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  • Salt-free dyeing method of cationic modified cotton fabric
  • Salt-free dyeing method of cationic modified cotton fabric
  • Salt-free dyeing method of cationic modified cotton fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] In this embodiment, the cotton fabric is dyed by using the salt-free dyeing method in this application.

[0040] The process and formula of cationic modification treatment are as follows:

[0041]

[0042] Add penetrating agent and modifier in the water bath first, then put the cotton fabric to be treated for immersion for 10 minutes, then add NaOH, continue to immerse for 10 minutes, after the second dipping and second rolling, the residual rate is 85%. Wash with water for 15 minutes, then wash in cold water until neutral, dry and wait for dyeing.

[0043] Salt-free dyeing: dye dosage 4% (omf), liquor ratio 1:15, dyeing at 60°C for 30min, adding Na 2 CO 3 (15g / L) keep warm at 60°C for 30min, wash with water and soap. The dye used for dyeing is specifically Drimarene red.

Embodiment 2

[0045] The difference between this example and Example 1 is that the cotton fabric to be dyed is not subjected to cationic modification treatment but is directly dyed without salt, and the process of dyeing unmodified cotton without salt is the same as that of Example 1.

Embodiment 3

[0047] The difference between this example and Example 1 is that the cotton fabric to be dyed is directly carried out without cationic modification treatment, and is dyed with salt, and the salt dyeing process of the cotton fabric to be dyed is added at the initial stage. 60g / L Na 2 SO 4 , and then add dye for coloring.

[0048] Effects are as shown in Table 1 in Examples 1-3.

[0049] Table 1

[0050]

[0051] It can be seen from the above table that the dyeing rate of salt-free dyeing of cotton fabrics modified by cations is much higher than that of conventional cotton fabrics dyed with salt, and the color fastness to rubbing is equivalent.

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Abstract

The invention provides a salt-free dyeing method of a cationic modified cotton fabric. The salt-free dyeing method comprises the steps of carrying out cationic modification treatment of a cotton fabric firstly and then carrying out salt-free dyeing; the cationic modification treatment comprises the steps of carrying out impregnation treatment on the cotton fabric in the cationic modification liquid. Through the cold pad batch method, a polyepichlorohydrin-dimethylamine cationic modifier is finished onto the cotton fabric, the working fluid can be recycled, and energy saving and environmental protection are achieved. The modified cotton fabric is dyed under the salt-free condition, the dyeing rate is higher than that of dyeing under a conventional cotton fabric salt condition, and a reactive dye is saved; at the same time, the pollution of salt dyeing Na2SO4 sewage to the environment is avoided.

Description

technical field [0001] The invention relates to a dyeing method, in particular to a salt-free dyeing method of cationic modified cotton fabric. Background technique [0002] Cotton is a kind of natural cellulose fiber, which has good hand feeling and comfort, and also has excellent hygroscopicity and durability. Cotton products are widely favored by people for clothing and home textiles. The dyeing of cotton fabrics mainly uses reactive dyes at present, but because cotton fibers have negative charges, and reactive dye molecules contain more anionic groups, they also have negative charges in aqueous solution, and the existence of electrostatic repulsion makes it difficult for dye molecules to approach cotton. Therefore, it is necessary to add a large amount of inorganic salts to promote dyeing in the dyeing process to increase the dye uptake rate of dyes. A great burden has come. At present, low-salt or no-salt dyeing has become an important research direction in the field ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/53D06M11/38D06P1/38D06P3/66D06M101/06
CPCD06M15/53D06M11/38D06M2101/06D06P1/38D06P3/66
Inventor 赵林马志
Owner LUOLAI LIFESTYLE TECH CO LTD
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