CN102787486B - A waterless washing process applied to denim fabric - Google Patents

Abstract

The invention provides a water-free washing process applied to jean fabric. The process provided by the invention has the following procedures of: (1) providing a jean garment after being pretreated; (2) providing a catalyst which can be used for effectively enhancing the efficiency of ozone; (3) preparing the catalyst into a solution and coating at the specific position of the jean garment to be washed; (4) placing the jean garment coated with the catalyst under a collaborative environment of ozone and ultrasonic waves for carrying out treatment; and (5) carrying out the aftertreatment of washing, drying and the like on the jean garment after being treated. Compared with a traditional jean cloth washing method, the jean garment is treated by utilizing the synergistic action of the ozone and the ultrasonic waves and the catalytic action of the catalyst, and the efficiency of the ozone can be largely enhanced, so that the color of dye is quickly oxidized for discoloring. Moreover, the method has the advantages that the procedures are short, the energy consumption is little, water is saved, zero discharge can be achieved basically, the equipment cost is low, the operation is easy and the like. The pollution of the washing industry can be effectively solved.

Description

A waterless washing process applied to denim fabric

technical field

The invention relates to the field of finishing of textiles.

Background technique

The denim washing industry is a major sewage discharger in the textile finishing industry. The wastewater discharged is large in quantity, high in organic pollutants, highly toxic, and difficult to degrade. It is a relatively difficult-to-treat polluted wastewater. With the development of the chemical industry, the variety of dyes has increased, and the difficulty of treating denim washing wastewater has greatly increased, and the corresponding sewage treatment costs have also greatly increased.

It has been found through research that ozone is a strong oxidizing gas and has a strong bactericidal effect. It can oxidize and decolorize the color of dyes and paints. However, due to the low ozone output and low oxidation efficiency, there are still few places where it is applied to the washing water industry. After investigation, it is found that ozone can greatly improve the utilization rate of ozone under the synergistic effect of ultrasonic waves, and coating the surface of denim clothing with a catalyst that can improve the activity of ozone can greatly increase the oxidation efficiency of ozone. Therefore, the synergistic effect of ozone and ultrasonic waves and supplemented by a catalyst can make ozone generate a large number of strong oxidizing free radicals, and quickly remove the color of dyes and paints.

In view of the above reasons, an ozone-related washing process is developed, that is, a water-free washing process applied to denim fabrics-using the synergy of ozone and ultrasonic waves and supplemented by catalysts to treat the parts to be washed. This washing process has the advantages of short process, less energy consumption, water saving, basically zero discharge, low equipment cost and easy operation, etc., which can effectively solve the pollution in the washing industry.

The washing process of traditional denim garments is complicated, consumes a lot of energy, and has low production efficiency; and after washing, the amount of wastewater discharged is large, and the organic substances contained in it are highly toxic and difficult to degrade, causing serious environmental pollution.

Contents of the invention

The purpose of the present invention is to provide a washing method with low pollution, low energy consumption, short flow process, high efficiency and easy operation, so as to effectively solve the cost problems of pollution and pollution treatment in the denim washing industry.

In view of the problems raised above, the ultraviolet light water-free washing method of denim fabrics made of a kind of dope dyed yarn provided by the present invention, its technological process is:

(1) Provide a denim garment after pretreatment;

(2) Provide a catalyst that can effectively improve ozone efficiency;

(3) Apply the catalyst as a solution to specific parts of the denim garments to be washed;

(4) Treat the denim garments coated with the catalyst in a synergistic environment of ozone and ultrasonic waves;

(5) Wash and dry the treated denim garments for post-processing.

As one of the contents of the present invention, the process (1) provides a denim garment after pretreatment. The fabric of the denim garment is: pure cotton fabric, polyester-cotton fabric, linen-cotton blended fabric, cotton-wool blended fabric or other blended fabrics.

As one of the contents of the present invention, the dye of the denim clothing may be a vat traditional dye, paint dye and the like.

As one of the contents of the present invention, the pretreatment includes cleaning treatment and softening treatment. The formula of this treatment is: penetrating agent 0.5-2.0g/L; softening agent 2.0-4.0g/L; anti-dyeing agent 0.5-2.0g /L; temperature 50-70°C; time 15-30min.

As one of the contents of the present invention, the process (2) provides a catalyst that can effectively improve the efficiency of ozone. The catalyst can be hydrogen peroxide, metal oxides (such as NiO, CuO, MnO, _{Fe2O3 ,} etc.) or hydrogen peroxide and metal oxide mixtures.

As one of the contents of the present invention, in the process (3), the catalyst is made into a solution and coated on a specific part of the denim garment to be washed. The specific part of the denim garment is any part, and it can also be the entire denim garment.

As one of the contents of the present invention, in the process (4), the denim garments coated with the catalyst are treated in a synergistic environment of ozone and ultrasonic waves. The treatment conditions are: ultrasonic frequency 15.0-25.0KHz; ultrasonic electric power 0-500W; ozone intake 0.06-0.10m3/h; temperature at room temperature; time 5-15min.

As one of the contents of the present invention, the post-treatment method such as washing and drying in the process (5) is: add an appropriate amount of industrial water at 50-70 °C to the washing machine, and use pumice to decolorize the denim clothing after ozone decolorization. Rinse for 10-20 minutes, then dry in the dryer.

As one of the contents of the present invention, the non-water washing process device of the present invention adopts an omnidirectional and uniform air intake mode, multi-directional ultrasonic generators are coordinated, and the inner denim clothing suspension conveyor belt adopts an S-shaped design. Such a design can make denim clothing each The degree of washing and decolorization of the parts can be uniform.

As an improvement and innovation of the present invention, compared with the traditional washing method, the present invention adopts anhydrous washing water, which has simple technological process, high working efficiency and less polluting substances.

Description of drawings

Figure 1 is a diagram of the water-free washing process device of the present invention;

1-Denim clothing hanging conveyor belt, 2-Ozone air intake hole, 3-Ultrasonic generator, 4-Clothes in and out of the automatic door.

Detailed ways

The present invention will be further described in detail through the embodiments below in conjunction with the accompanying drawings. However, it should be understood that the protection scope of the present invention is not limited to the following examples, and the schemes with the same idea and principle of the present invention are all within the protection scope of this patent.

Embodiment one

(1) Provide a pure cotton denim garment dyed with indigo dye;

(2) Wash the above-mentioned denim garments with water according to the following formula, soften them and dry them;

Penetrant 0.5g/L;

Softener 2.0g/L;

Anti-staining agent 0.5g/L;

Temperature 50°C;

Time 15min;

(3) Use CuO as a catalyst to make a solution and apply it to the thighs of denim clothing;

(4) Suspend denim clothing coated with catalyst on the 1-denim clothing suspension conveyor belt in accompanying drawing 1; control 3-ultrasonic generator frequency is 20.0KHz, and ultrasonic generator electric power is 300W; control 2-ozone air inlet The ozone intake rate is 0.08m3/h; adjust the internal temperature of the device to room temperature; treat for 10 minutes. After processing, it is taken out by the 4-clothes in and out automatic door;

(5) Add an appropriate amount of industrial water at 50°C to the washing machine and rinse with pumice stones for 10 minutes to the treated denim garments, and then dry them in a dryer.

Embodiment two

(1) Provide a hemp-cotton blended denim garment dyed with sulfur dye;

(2) Wash the above-mentioned denim garments with water according to the following formula, soften them and dry them;

Penetrant 1.0g/L;

Softener 3.0g/L;

Anti-staining agent 1.0g/L;

Temperature 60°C;

Time 20min;

(3) Apply hydrogen peroxide as a catalyst to the buttocks of denim clothing;

(4) Suspend denim clothing coated with catalyst on the 1-denim clothing suspension conveyor belt in accompanying drawing 1; control 3-ultrasonic generator frequency is 18.0KHz, and the electric power of ultrasonic generator is 400W; control 2-ozone air inlet The ozone intake rate is 0.09m3/h; adjust the internal temperature of the device to room temperature; treat for 12 minutes. After processing, it is taken out by the 4-clothes in and out automatic door;

(5) Add an appropriate amount of industrial water at 60°C to the washing machine, and rinse with pumice stones for 15 minutes, and then dry them in a dryer.

Embodiment three

(1) Provide a polyester-cotton blended denim garment dyed with dope dye;

(2) Wash the above-mentioned denim garments with water according to the following formula, soften them and dry them;

Penetrant 2.0g/L;

Softener 4.0g/L;

Anti-staining agent 2.0g/L;

Temperature 70°C;

Time 30min;

(3) Use hydrogen peroxide-NiO as a catalyst to make a solution and apply it to the entire denim garment;

(4) Suspend denim clothing coated with catalyst on the 1-denim clothing suspension conveyor belt in accompanying drawing 1; control 3-ultrasonic generator frequency is 22.0KHz, and ultrasonic generator electric power is 250W; control 2-ozone air inlet The ozone intake rate is 0.10m3/h; adjust the internal temperature of the device to room temperature; treat for 8 minutes. After processing, it is taken out by the 4-clothes in and out automatic door;

(5) Add an appropriate amount of industrial water at 70°C to the washing machine, and rinse with pumice stones for 20 minutes, and then dry them in a dryer.

Claims (4)

1. be applied to jean without a washing water technique, it is characterized in that: technological process is:

(1) provide a kind of through pretreated jeans;

(2) provide a kind of catalyst that can effectively improve ozone efficiency;

(3) catalyst made to solution be coated in the privileged site of the jeans of wanting wash water;

(4) jeans that scribble catalyst are placed under ozone and ultrasonic synergistic environment and are processed;

(5) jeans after treatment are carried out to cleaning, drying post processing;

Described flow process (4) is placed in the jeans that scribble catalyst under ozone and ultrasonic synergistic environment and processes, and its treatment conditions are: ultrasonic frequency 15.0-25.0KHz; Ultrasonic wave electrical power 0-500W, but be not equal to 0W; Ozone air inflow 0.06-0.10m3/h; Temperature is room temperature; Time 5-15min;

Cleaning, drying post-processing approach in described flow process (5) is: in rinsing maching, add appropriate 50-70 DEG C water for industrial use, and be equipped with the jeans of float stone after to ozone decolorization and rinse 10-20min, then in dryer, dry;

It is a kind of through pretreated jeans that described flow process (1) provides, and the fabric of these jeans is: pure-cotton fabric, or polyester-cotton blend fabric, or Cotton and Hemp blending fabric, or cotton wool blended yarn woven fabric;

The dyestuff used that dyes is bipseudoindoxyl dye or SULPHUR DYES or coating dyestuff;

Described preliminary treatment comprises clean, soft treatment, and the formula of this processing is: bleeding agent 0.5-2.0g/L; Softener 2.0-4.0g/L; Resist agent 0.5-2.0g/L; Temperature 50-70 DEG C; Time 15-30min.

2. be applied to according to claim 1 jean without washing water technique, it is characterized in that: described flow process (2) provides a kind of catalyst that can effectively improve ozone efficiency, this catalyst can be the mixture of hydrogen peroxide, metal oxide or hydrogen peroxide and metal oxide.

3. be applied to according to claim 2 jean without washing water technique, it is characterized in that: described metal oxide is NiO or CuO or MnO or Fe ₂o ₃.

4. be applied to according to claim 1 jean without washing water technique, it is characterized in that: the privileged site that jeans described in the privileged site that solution is coated in the jeans of wanting wash water made by catalyst by described flow process (3) is any part, also can be whole jeans.