CN103526605A - Dyeing and finishing method for pure cotton fabric - Google Patents

Abstract

The invention discloses a dyeing and finishing method for a pure cotton fabric. The method comprises the steps as follows: the pure cotton fabric is steeped in water for pre-swelling, and the liquid rate is 70 %-75 %; then the fabric is immersed in a dyeing liquid containing 5 wt%-10 wt% of an activated dye, the temperature is raised to 40 DEG C-50 DEG C, and heat insulation is performed for 30 min; isopropanol with the volume equal to that of the dyeing liquid is added, the temperature is raised to 80 DEG C-85 DEG C, and heat insulation is performed for 30 min; then sodium carbonate accounting for 3 wt%-5 wt% of the dyeing liquid is added; and the temperature is raised to 80 DEG C-85 DEG C, heat insulation is performed for 30 min, the fabric is cooled to the room temperature and washed with water, soaps and water sequentially, and the product is obtained. According to the dyeing and finishing method for the pure cotton fabric, the production flow is short, the process is simple, the operation is facilitated, the practicability is high, special equipment is not required, and the industrial application is easy to implement.

Description

The dyeing and finishing method of pure cotton fabric

Technical field

The present invention relates to a kind of dyeing and finishing method of pure cotton fabric, relate in particular to a kind of method of pure cotton fabric salt-free dyeing.

Background technology

Bright in colour, the wet fastness of REACTIVE DYES is good, it is the most important dye of stock-dye, but in its dyeing course, be raising dyestuff dye-uptake and degree of fixation, the a large amount of inorganic salts of normal use, these inorganic salts are difficult to remove by simple physical chemistry and biochemical treatment, to environment, have brought great burden.REACTIVE DYES exploitation low, salt-free dyeing technique at present mainly launches several aspects such as the rational low salt dyeing technique of research and development, fibre modification and formulation synthetic around new dye, dyeing assistant.

The technique that realizes low salt dyeing mainly contains wet short steaming, salt-free pad steam continuous processing and cold rolling batch-dying process, but process conditions are very strict, and dyestuff, auxiliary agent etc. is also had to higher requirement, and part technique also needs to develop new equipment.Therefore, exploitation salt-free dyeing Method and process has great importance to realizing the industry development target of energy-saving and emission-reduction, ecological, environmental protective.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of dyeing and finishing method of pure cotton fabric, the above-mentioned defect existing to overcome prior art.

For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of dyeing and finishing method of pure cotton fabric, comprises the steps:

1) pure cotton fabric is soaked in water and carry out pre-swelling, liquid carrying rate is 70-75%, then immerses in the dye liquor that contains 5-10wt% REACTIVE DYES, is warming up to 40-50 ℃, insulation 30min;

2) add and the isopyknic isopropyl alcohol of dye liquor, be warming up to 80-85 ℃ and be incubated 30min, then add the soda ash that accounts for dye liquor 3-5wt%;

3) be warming up to 50-60 ℃ and be incubated 30min, be down to room temperature, after washing, soap, washing, obtain product.

As preferably, described in soap in step, add sodium hydrosulfite 2-4g/L, caustic soda 2-4g/L, soaping agent concentration 1.5-2.5%, temperature 80-100 ℃, washes 10-25min.

The dyeing and finishing method of pure cotton fabric provided by the present invention, utilizes the difference of dyestuff dissolution properties in the cosolvent of Shui Heshui-organic solvent, by the organic solvent dissolving each other with water, REACTIVE DYES is urged to dye, to realize the salt-free dyeing of REACTIVE DYES; Compare with current existing REACTIVE DYES low-salt and salt-free dyes technology, production procedure is short, technique is simple, and easy operating is practical, does not need special equipment, and industrialization promotion is easy to implement.

The specific embodiment

Embodiment 1:

The dyeing and finishing method of pure cotton fabric, comprises the steps:

1) pure cotton fabric is soaked in water and carry out pre-swelling, liquid carrying rate is 70%, then immerses in the dye liquor that contains 5wt% REACTIVE DYES, is warming up to 40 ℃, insulation 30min;

2) add and the isopyknic isopropyl alcohol of dye liquor, be warming up to 80 ℃ and be incubated 30min, then add the soda ash that accounts for dye liquor 3wt%;

3) be warming up to 50 ℃ and be incubated 30min, be down to room temperature, after washing, soap, washing, obtain product.

Described soaping in step, adds sodium hydrosulfite 2g/L, caustic soda 2g/L, and soaping agent concentration 1.5%, 80 ℃ of temperature, wash 25min.

Embodiment 2:

The dyeing and finishing method of pure cotton fabric, comprises the steps:

1) pure cotton fabric is soaked in water and carry out pre-swelling, liquid carrying rate is 75%, then immerses in the dye liquor that contains 10wt% REACTIVE DYES, is warming up to 50 ℃, insulation 30min;

2) add and the isopyknic isopropyl alcohol of dye liquor, be warming up to 85 ℃ and be incubated 30min, then add the soda ash that accounts for dye liquor 5wt%;

3) be warming up to 60 ℃ and be incubated 30min, be down to room temperature, after washing, soap, washing, obtain product.

Described soaping in step, adds sodium hydrosulfite 4g/L, caustic soda 4g/L, and soaping agent concentration 2.5%, 100 ℃ of temperature, wash 25min.

Claims (2)

1. the dyeing and finishing method of pure cotton fabric, is characterized in that, comprises the steps:

1) pure cotton fabric is soaked in water and carry out pre-swelling, liquid carrying rate is 70-75%, then immerses in the dye liquor that contains 5-10wt% REACTIVE DYES, is warming up to 40-50 ℃, insulation 30min;

2) add and the isopyknic isopropyl alcohol of dye liquor, be warming up to 80-85 ℃ and be incubated 30min, then add the soda ash that accounts for dye liquor 3-5wt%;

3) be warming up to 50-60 ℃ and be incubated 30min, be down to room temperature, after washing, soap, washing, obtain product.

2. the dyeing and finishing method of pure cotton fabric according to claim 1, is characterized in that, described in soap in step, add sodium hydrosulfite 2-4g/L, caustic soda 2-4g/L, soaping agent concentration 1.5-2.5%, temperature 80-100 ℃, washes 10-25min.