A process of printing and dyeing leather with lemon peel juice

A technology of lemon peel and leather, applied in the field of leather dyeing, to achieve natural color, achieve dyeing balance, and improve the effect of dyeing quality

Active Publication Date: 2018-02-09
GUANGZHOU PANYU POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the application of natural dyes in leather dyeing and coloring is mostly in the laboratory stage.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The process of printing and dyeing leather with lemon peel juice, the process includes the following steps:

[0049] 1) extract lemon yellow pigment:

[0050] Extraction: Remove the pulp from fresh lemons, scrape off the peels, chop them and add NaCl to marinate for 1 hour, then transfer them to the extractor, add 90% ethanol to extract at 50°C for 2.5 hours, and the extraction is over Finally, ethanol is recovered to obtain a tartrazine concentrated solution;

[0051]Purification: Put the above-mentioned lemon yellow pigment concentrate on a silica gel column, and use a mixture of oil ether and 90% ethanol as the eluent to elute, wherein the volume ratio of petroleum ether and ethanol is 2:1; collect the yellow eluate part, depressurize Concentrate to obtain purified lemon yellow pigment;

[0052] 2) Dye preparation:

[0053] Add tartrazine extract and color-fixing agent to the lemon yellow pigment obtained in step 1), wherein 37 parts of lemon yellow pigment, 12 pa...

Embodiment 2

[0059] The process of printing and dyeing leather with lemon peel juice, the process includes the following steps:

[0060] 1) extract lemon yellow pigment:

[0061] Extraction: Fresh lemons are peeled and peeled after the pulp is removed, chopped and marinated with NaCl for 1.5 hours, then transferred to the extractor, added with 92% ethanol to extract at 65°C for 2 hours, and the extraction is completed Finally, ethanol is recovered to obtain a tartrazine concentrated solution;

[0062] Purification: Put the above-mentioned lemon yellow pigment concentrate on a silica gel column, and use a mixture of oil ether and 90% ethanol as the eluent to elute, wherein the volume ratio of petroleum ether and ethanol is 2:1; collect the yellow eluate part, depressurize Concentrate to obtain purified lemon yellow pigment;

[0063] 2) Dye preparation:

[0064] Add tartrazine extract and color-fixing agent to the lemon yellow pigment obtained in step 1), wherein 46 parts of lemon yellow ...

Embodiment 3

[0070] The process of printing and dyeing leather with lemon peel juice, the process includes the following steps:

[0071] 1) extract lemon yellow pigment:

[0072] Extraction: Remove the pulp from fresh lemons, scrape off the peels, chop them and add NaCl to marinate for 2 hours, then transfer them to the extractor, add 95% ethanol to extract at 80°C for 1.5 hours, and the extraction is over Finally, ethanol is recovered to obtain a tartrazine concentrated solution;

[0073] Purification: Put the above-mentioned lemon yellow pigment concentrate on a silica gel column, and use a mixture of oil ether and 90% ethanol as the eluent to elute, wherein the volume ratio of petroleum ether and ethanol is 2:1; collect the yellow eluate part, depressurize Concentrate to obtain purified lemon yellow pigment;

[0074] 2) Dye preparation:

[0075] Add tartrazine extract and color-fixing agent to the lemon yellow pigment obtained in step 1), wherein 62 parts of lemon yellow pigment, 25 ...

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PUM

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Abstract

The invention discloses a process of printing and dyeing leather with lemon peel juice. The process includes the following steps: extracting lemon yellow pigment through extraction, purification and the like; dyeing the leather, which is subjected to mordant dyeing with rare earths, with the lemon dye; and coating the leather with neatsfoot oil. In the invention, the natural dye and the surface of the leather are treated, and the dyeing effect is improved by dyeing the leather with the natural dye.

Description

technical field [0001] The invention relates to the technical field of leather dyeing, in particular to a process for printing and dyeing leather with lemon peel juice. Background technique [0002] Leather is denatured and non-perishable animal skin obtained through physical and chemical processing such as depilation and tanning. Leather is composed of natural protein fibers tightly woven in three-dimensional space. There is a special grain layer on the surface, which has natural grain and luster, and feels comfortable. Leather is widely used in main industries such as shoemaking, leather clothing, leather goods, fur and its products, as well as supporting industries such as leather chemicals, leather hardware, leather machinery, and accessories. [0003] There are different types of leather on the market, including genuine leather, recycled leather, artificial leather, and synthetic leather. Whether it is genuine leather or artificial leather, it is a single color before...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P1/34D06P3/32D06P1/673D06P1/653D06P5/04
CPCD06P1/34D06P1/6533D06P1/67341D06P3/32D06P5/04
Inventor 张来源刘科江邹冰邵娟
Owner GUANGZHOU PANYU POLYTECHNIC
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