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Production process of genuine leather

A production process and leather technology, applied in the field of leather leather production technology, can solve problems such as affecting the use of leather, reducing leather quality, and easy cracking of the coating, achieving the effects of not easy cracking, improving leather quality, and good coordination.

Inactive Publication Date: 2020-06-23
漳州信德皮革有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, when the leather is stretched by tension, the coating is easy to crack and fall off, resulting in cracked surface, reducing the quality of the leather and affecting the use of the leather

Method used

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  • Production process of genuine leather
  • Production process of genuine leather
  • Production process of genuine leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A production process of genuine leather, specifically including the following steps:

[0048] Step 1. Batching: Put the original skins with similar width and thickness in the same drum for processing, the original skin weight is 10kg;

[0049] Step 2. Water soaking: add water to the drum to soak the raw hides according to the liquid ratio of 1.2, and add 25% ammonia water, adjust the pH of the water in the drum to 7.5, the immersion temperature to 25°C, and the soaking time to 25h;

[0050] Step 3. Meat removal: Take out the raw skin that has been soaked in water, and use a meat removal machine to remove the hair on the surface of the raw skin and the meat on the raw skin;

[0051] Step 4. Liming: The raw hides after meat removal are placed in a rotating drum and soaked in sodium hydroxide solution with pH 11, liquid ratio is 1.2, soaking temperature is 25°C, and soaking time is 25h;

[0052] Step 5. Deliming: After the liming is finished, the sodium hydroxide solution in step 4 ...

Embodiment 2

[0064] A production process of genuine leather, specifically including the following steps:

[0065] Step 1. Batching: Put the original skins with similar width and thickness in the same drum for processing, the original skin weight is 10kg;

[0066] Step 2. Water soaking: add water to the drum according to the liquid ratio of 1.5 to soak the original hides, and add 25% ammonia water, adjust the pH to 8.5, the soaking temperature to 28°C, and the soaking time to 15h;

[0067] Step 3. Meat removal: Take out the raw skin that has been soaked in water, and use a meat removal machine to remove the hair on the surface of the raw skin and the meat on the raw skin;

[0068] Step 4. Liming: The raw hides after meat removal are placed in a rotating drum and immersed in a calcium hydroxide solution with a pH of 12, the liquid ratio is 1.5, the immersion temperature is 28°C, and the immersion time is 20h;

[0069] Step 5. Deliming: After the liming is finished, the calcium hydroxide solution in st...

Embodiment 3

[0081] A production process of genuine leather, specifically including the following steps:

[0082] Step 1. Batching: Put the original skins with similar width and thickness in the same drum for processing, the original skin weight is 10kg;

[0083] Step 2. Water soaking: Add water to the drum to soak the raw hides according to the liquid ratio of 1.4, and add 25% ammonia water, adjust the pH to 8, the soaking temperature is 27°C, and the soaking time is 21h;

[0084] Step 3. Meat removal: Take out the raw skin that has been soaked in water, and use a meat removal machine to remove the hair on the surface of the raw skin and the meat on the raw skin;

[0085] Step 4. Liming: The raw hides after meat removal are placed in a rotating drum and soaked in calcium hydroxide solution with pH 12, the liquid ratio is 1.4, the soaking temperature is 28°C, and the soaking time is 20h;

[0086] Step 5. Deliming: After the liming is finished, drain the calcium hydroxide solution in step 4, add 30°C...

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Abstract

The invention relates to a production process of genuine leather, and relates to the technical field of leather processing. The method comprises the steps of batch grouping, water soaking, fleshing, liming, de-liming, softening, pickling, tanning, dyeing pretreatment, dyeing, fat liquoring, finishing pretreatment and finishing. Polyurethane, epoxy resin and acrylic resin emulsion are added into afinishing agent to form a uniform and transparent film on the surface of leather. A film formed by polyurethane is soft and extensible, epoxy resin becomes soft along with rising of temperature; flatfinishing is promoted, acrylic resin emulsion is not layered or caked and has a good coordination property; the bonding force between casein and leather is strong, the gloss is soft; casein and leather are compounded for use and mutually interacted, the adhesive force between a coating and genuine leather is good, the elasticity, the softness and the ductility are consistent with those of leather,the coating is not easy to crack and fall off when the leather is stretched, and the leather quality is improved.

Description

Technical field [0001] The invention relates to the technical field of leather processing, in particular to a leather leather production process. Background technique [0002] Genuine leather, also known as natural leather, is an animal skin that has been denatured and not perishable obtained by physical and chemical processing such as dehairing and tanning. The leather is composed of natural protein fibers tightly woven in a three-dimensional space. Its surface has a special The grained surface layer has natural grain and luster. According to the type of leather leather, there are mainly pig leather, cow leather, sheep leather, horse leather and kangaroo leather. In addition, there are a small amount of fish leather, reptile leather, and amphibian leather. [0003] The natural defects of raw leather and the defects caused by improper control and operation in the production process, such as rough surface, discoloration, color difference, etc., can be improved by means of grinding ...

Claims

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Application Information

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IPC IPC(8): C14C1/04C14C1/08C14C3/06C14C11/00C14C15/00
CPCC14C1/04C14C1/08C14C3/06C14C11/003C14C15/00
Inventor 李加阳
Owner 漳州信德皮革有限公司
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