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Continuous leather staining method by ultrasonic wave and microwave radiation

A technology of microwave radiation and dyeing method, which is applied in the field of leather dyeing, can solve the problems that dyes are difficult to penetrate deeply and distribute uniformly, and cannot meet the basic requirements of dyeing of high-quality leather dyes, and achieve the effect of ingenious conception, simple process and operation

Inactive Publication Date: 2010-12-29
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the microwave dyeing method has the advantages of high efficiency, environmental protection and energy saving, however, due to the difference from the plane weaving of fibers in textiles, leather dyed leather is a natural polymer material with a certain thickness that is three-dimensionally woven by collagen fibers. When irradiated, after a short time of action (<10min), it is difficult for the dye to penetrate deeply and distribute evenly in the incision of the dyed leather along the thickness direction, so it cannot meet the basic requirements of high-quality leather for dye coloring

Method used

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  • Continuous leather staining method by ultrasonic wave and microwave radiation
  • Continuous leather staining method by ultrasonic wave and microwave radiation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] After retanning with chrome tanning agent, sulfated castor oil and polymer fatliquor, the wet sheep leather shoe upper leather with a thickness of 1.4mm is first mechanically extruded to a moisture content of 50-55%, and then ultrasonically The frequency is 20kHz and the radiation intensity is 0.5W / cm 2 , dyed in a dyeing bath solution at 25°C containing 4% penetrating black and 0.5% polysiloxane wetting agent for 1 min; mechanically extruded the dyed leather until the content of the dye solution was 60-65%, and the frequency of use was 2450MHz, radiation intensity of 1W / cm 3 Microwave irradiation for 1min; the dyed leather after microwave irradiation is at an ultrasonic frequency of 20kHz and a radiation intensity of 0.5W / cm 2 , fix the color in a 1% aluminum chloride solution at a temperature of 25°C for 3 minutes; mechanically squeeze the dyed leather that has been fixed until the content of the fixing solution is 60-65%, and then proceed according to the convention...

Embodiment 2

[0028] After retanning with amino resin retanning agent, sulphated ox hoof oil and lecithin fatliquoring agent, the wet goatskin shoe upper leather with a thickness of 1.6mm is first mechanically extruded to a moisture content of 45-50%, and then At an ultrasonic frequency of 40kHz and a radiation intensity of 1.5W / cm 2 , dyed in a dyeing bath solution containing 0.5% reactive yellow and 0.2% alkylphenol ether sulfosuccinate sodium at a temperature of 45°C for 2 minutes; mechanically extruded the dyed leather until the content of the dye solution was 50-55%, and then used The frequency is 2450MHz, and the radiation intensity is 0.1W / cm 3 Microwave irradiation for 3min. Then, dry and paint and other treatments can be carried out according to the conventional follow-up procedures. The extruded dye solution returns to the system.

Embodiment 3

[0030] Retanned with chrome tanning agent and acrylic resin retanning agent, fatliquored with synthetic hoof oil fatliquor, the wet pigskin shoe lining leather with a thickness of 1.6mm is first mechanically extruded to a moisture content of 55-60%, and then Ultrasonic frequency is 70kHz, radiation intensity is 3W / cm 2 , Dyeing in a dyeing bath solution containing 1% reactive red and 1% sodium polysuccinate sulfonate at a temperature of 40°C for 3 minutes; mechanically squeeze the dyed leather until the content of the dye solution is 65-70%, and use a frequency of 2450MHz , Radiation intensity is 3W / cm 3 Microwave irradiation for 1min; the dyed leather after microwave irradiation is at an ultrasonic frequency of 70kHz and a radiation intensity of 3W / cm 2 , the temperature is 40 ℃, the concentration is 1% aluminum trichloride and aluminum sulfate (mass ratio is 1: 1) solution 1min; The dyed leather mechanically extruded to fix color is 65 After ~70%, it is enough to carry out...

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Abstract

The invention discloses a continuous leather staining method by ultrasonic wave and microwave radiation, which comprises the following steps: retanning greasing leather is mechanically extruded with water content of less than or equal to 60%; then the extruded leather is dyed for at least 1min in a dying bath liquid containing surface active material in an ultrasonic wave sound field with a frequency of less than or equal to 100 KHz; the leather is mechanically extruded with dye solution content of more than or equal to 50% once again; then microwave irradiation is carried out on the leather for at least 1 min or the dyed leather which goes through the microwave irradiation is fixed for at least 1min in a fixative containing fixing materials, which is in an ultrasonic wave sound field with a frequency of less than or equal to 100 KHz; then the dyed leather after color fixing is mechanically extruded with fixative content of more than or equal to 50%; finally drying and coating are carried out on the leather according to conventional operational sequences. The method of the invention features ingenious conception, simple process and operation, can enable penetration depth of the dye to reach 0.5-2mm, ensures no obvious difference in terms of color depth of surface color and notch color, completely meets dying requirements of conventional soft leather, and facilitates dry-resistance, wet-resistance and wipe-resistance of surface color of the dyed leather to reach color staining fastness level 4-5 or more than or equal to level 3.

Description

technical field [0001] The invention belongs to the technical field of leather dyeing, and in particular relates to an efficient and environment-friendly continuous leather dyeing method utilizing ultrasonic waves and microwave radiation. Background technique [0002] Dyeing is an important process in tanning production, and its purpose is to give leather a certain color. Dyeing can improve the appearance of leather, make it suitable for popular styles, and increase the added value of its products. [0003] At present, the main method of leather dyeing is water bath dyeing in a drum. Due to the large output per drum skin, the dyeing process is relatively fixed, and the color variety is single, this dyeing method is difficult to adapt to the rapid change of popular color varieties in the market, and will generate a large amount of high-chroma and difficult-to-treat tanning wastewater. With the continuous strengthening of people's awareness of environmental protection, the m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P5/20D06P3/32
Inventor 陈武勇龚英成康刘晓玲
Owner SICHUAN UNIV
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