CN102409557A - Wool surface treatment and low-temperature dyeing method - Google Patents

Abstract

The invention discloses a method for treating wool surface and dyeing at low temperature, wherein the wool surface is treated with a binary solvent composed of ionic liquid and water at room temperature, washed with water, and the dyeing temperature is 65-85° C. The method of the invention treats wool at room temperature, and the ionic liquid in the treatment solvent can be recycled, and has the advantages of good level dyeing, high fabric strength retention rate, low dyeing temperature, etc.

Description

A kind of wool surface treatment, low temperature dyeing method

technical field

The invention relates to a wool treatment method, in particular to a wool surface treatment and low-temperature dyeing method.

Background technique

The traditional high-temperature dyeing of wool not only consumes a lot of energy, but also makes the wool suffer from chemical reagents and heat at high temperature, causing the wool to turn yellow, greatly affecting the fiber appearance and physical and mechanical properties, and destroying the excellent natural quality of wool.

At present, there are chlorine salt oxidation pretreatment methods, formic acid pretreatment methods, and biological enzyme pretreatment methods for wool low-temperature dyeing methods at home and abroad. In the chlorine salt oxidation pretreatment method, whether it is sodium dichloroisocyanurate (DCCA) or sodium hypochlorite, AOX will be produced during use, which will cause certain pollution to the environment; in the formic acid pretreatment method, due to the excessive amount of formic acid, It has a great corrosive effect on the equipment, and can only dye medium and light colors, and it is easy to cause uneven dyeing, which is difficult to promote; the concentration and activity of the enzyme in the biological enzyme pretreatment method are affected by many factors, too much enzyme preparation Inhaled into the human body, it will have a greater adverse effect on the human body. In a word, the above-mentioned methods for low-temperature dyeing of wool have not been applied industrially.

Contents of the invention

In order to overcome the above-mentioned defects, the present invention provides a wool surface treatment and low-temperature dyeing method, which is characterized in that: the wool surface is treated with a binary solvent composed of ionic liquid and water at room temperature, washed with water, and the dyeing temperature is 65-85 ℃.

As a preferred technical solution of the present invention, wherein the mass ratio of the ionic liquid to water is 95:5-5:95.

As another preferred technical solution of the present invention, wherein the ionic liquid is butyl imidazolium chloride salt, and the ionic liquid is recovered after surface treatment.

As yet another technical solution of the present invention, wherein the surface treatment time is 0.1-168h.

The dyeing process formula of the present invention follows the conventional boiling dyeing process formula in the art, except that the dyeing temperature is lower than the boiling dyeing process. Certainly the present invention also can adopt the dyeing recipe process parameter of reactive dyestuff, concrete parameter is as follows:

Reactive dyes (%) (o.w.f) 0.5-2;

Leveling agent Pingping plus O (g/L) 1;

Salt (g/L) 30;

Dyeing temperature (℃) 65-85;

pH 4-5;

Bath ratio 1:30-100;

Dyeing holding time (min) 40-80;

Heating rate (℃/min) 0.5-3.

As a preferred technical solution of the present invention, the temperature can be raised to 75-85°C for heat preservation dyeing, preferably 80-85°C; the heat preservation dyeing time is preferably 40-80min, more preferably 45-65min; the heating rate is preferably 0.5-2.5°C/min , more preferably 0.5-1.5°C/min.

All raw materials used in the present invention are commonly used materials and can be purchased from the market.

All amounts and percentages in the present invention are by weight and percentages by weight unless otherwise indicated.

The method of the invention treats the wool at room temperature, and the ionic liquid in the treatment solvent can be recycled, and has the advantages of good level dyeing property, high fabric strength retention rate, low dyeing temperature and the like.

Description of drawings

Fig. 1 is the heating curve diagram of the wool surface treatment and low temperature dyeing method of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example 1 Low temperature dyeing of wool fabric with reactive dyes.

Put the wool fabric into the surface treatment agent (butylimidazolium chloride salt/water mass ratio is 50/50) for 8 hours, wash with water, and recycle the butylimidazolium chloride salt; put the wool fabric into the lifting dyeing machine, and again Enter water to the specified bath ratio of 1:30, add salt and leveling agent and run for 10 minutes, adjust the pH value, add dye and run for 10 minutes, the temperature rise rate is controlled by 1°C/min. Raise the temperature to 80°C and keep it warm for 60 minutes, then cool down and wash with water. The color depth of the wool fabric obtained by this process is comparable to the conventional 98°C color depth.

craft K/S Routine dyeing at 98°C for 60min 47 This method dyes at 80°C for 60min 45

Example 2 Low-temperature dyeing of wool yarn with reactive dyes

Wind the wool yarn into a loose coil, put it into the wool surface treatment agent (butylimidazolium chloride salt/water mass ratio is 60/40) for 6 hours, wash with water, and recover the butylimidazolium chloride salt; the wool yarn Put it into the lifting dyeing machine, feed water again to the specified bath ratio of 1:100, add salt and leveling agent and run for 10 minutes, adjust the pH value, add dye and run for 10 minutes, and the heating rate is controlled by 1°C/min. Raise the temperature to 85°C and keep it warm for 60 minutes, then cool down and wash with water. The color depth of wool yarn obtained by this process is close to the conventional 98°C color depth.

Example 3 Low temperature dyeing of wool loose fiber reactive dyes

Put wool bulk fiber into wool surface treatment agent (butylimidazolium chloride salt/water mass ratio is 70/30) for 4 hours, wash with water, and recover butylimidazolium chloride salt; put wool loose fiber into lifting dyeing machine In the middle, water again to the specified bath ratio of 1:60, add salt and leveling agent and run for 10 minutes, adjust the pH value, add dye and run for 10 minutes, the temperature rise rate is controlled by 1°C/min. Raise the temperature to 85°C and keep it warm for 60 minutes, then cool down and wash with water. The color depth of loose wool fibers obtained by this process is close to the color depth obtained at conventional 98°C.

The above-listed embodiments are only enumerations of the present invention, and those skilled in the art can understand that simple modifications, replacements or combinations with conventional means in the field all belong to the protection scope of the present invention.

Claims (9)

1. A wool surface treatment and low-temperature dyeing method, characterized in that: the wool surface is treated with a binary solvent composed of ionic liquid and water at room temperature, washed with water, and dyed, and the dyeing temperature is 65-85°C. 2. A kind of wool surface treatment according to claim 1, low temperature dyeing method, it is characterized in that: the mass ratio of described ionic liquid and water is 95:5-5:95. 3. A method for surface treatment and low-temperature dyeing of wool according to claim 1 or 2, characterized in that: the ionic liquid is butylimidazolium chloride, and the ionic liquid is recovered after surface treatment. 4. The wool surface treatment and low-temperature dyeing method according to claim 3, characterized in that: the dyeing step uses reactive dyes. 5. A kind of wool surface treatment according to claim 4, low temperature dyeing method, it is characterized in that: wherein each parameter is as follows: Reactive dyes 0.5-2%; Leveling agent Pingping plus O 1g/L; Salt 30g/L; Dyeing temperature 65-85℃; pH 4-5; Liquor ratio 1:30-100; Dyeing holding time 40-80 minutes; Heating rate 0.5-3°C/min. 6. A wool surface treatment and low-temperature dyeing method according to claim 5, characterized in that: the temperature is raised to 75-85°C for 40-80 minutes, and the heating rate is 0.5-2.5°C/min. 7. A wool surface treatment and low-temperature dyeing method according to claim 5, characterized in that: the temperature is raised to 80-85°C for 40-80 minutes and the heating rate is 0.5-2.5°C/min. 8. A wool surface treatment and low-temperature dyeing method according to claim 5, characterized in that: the temperature is raised to 80-85°C and the dyeing is kept for 40-80 minutes, and the temperature rise rate is 0.5-1.5°C/min. 9. A wool surface treatment and low-temperature dyeing method according to claim 5, characterized in that: the temperature is raised to 80-85°C for 40-65 minutes, and the heating rate is 0.5-1.5°C/min.

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