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Production method of high-strength calf hide for special purpose

A production method and high-strength technology, applied in the field of leather, can solve the problems that the strength of the finished leather affects the service life of the product, and achieve the effects of excellent oxidation resistance, chemical solvent resistance, and improved fullness

Active Publication Date: 2017-05-03
JIHUA 3512 LEATHER & GARMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Leather products have a strong protective effect on workers in the mine, petroleum and other industries, and even people's leisure and home are inseparable from leather products; however, the finished leather strength of leather seriously affects the service life of its products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Weighing process: Weighing 100 kg calf wet blue hide after conventional process treatment and shaving, as the basis for the mass percentage of water and leather chemicals in the wet processing stage of the subsequent process.

[0023] 2. Return water: First add 200%×100kg=200kg of water at 40°C to the drum, add wetting agent SAF 0.3%×100kg=0.3kg, oxalic acid 1.0%×100kg=1.0kg, rotate for 10 minutes; Peel, turn for 60 minutes, and drain.

[0024] 3. Degreasing: First add 200%×100kg=200kg of water at 40°C to the drum, then add degreasing agent DB 2.0%×100kg=2.0kg, BE-C 1.0%×100kg=1.0kg and formic acid 0.3%×100kg= 0.3kg, rotate for 60 minutes; drain.

[0025] 4. Retanning: add 100%×100kg=100kg of water at 38°C, add fatty aldehyde 4.0%×100kg=4.0kg, add PAC2.0%×100kg=2.0kg, rotate for 30 minutes; add leather brilliant blue B1. 3%×100kg=1.3kg, leather black DMX0.7%×100kg=0.7kg, acid black 10B 0.3%×100kg=0.3kg and fatliquor GLH 2.5%×100kg=2.5kg, rotate for 30 minutes; Glu...

Embodiment 2

[0031] 1, weighing procedure: with embodiment 1;

[0032] 2. Return water: first add 200%×100kg=200kg water at 45°C to the drum, add wetting agent SAF0.5%×100kg=0.5kg, oxalic acid 1.2%×100kg=1.2kg, and rotate for 10 minutes; then Cut off the skin, turn for 60 minutes, and drain;

[0033] 3. Degreasing: first add 200%×100kg=200kg, 45°C water to the drum, and the remainder is the same as in Example 1;

[0034] 4. Retanning: add 100%×100kg=100kg of 40°C water; add 100%×100kg=100kg of 45°C water, the same as in Example 1;

[0035] 5. Neutralization: Add 180%×100kg=180kg, 40°C water to the drum, the rest is the same as in Example 1;

[0036]6. Filling and fatliquoring: add 150%×100kg=150kg, 55°C water into the drum, the rest is the same as in Example 1;

[0037] 7. Top dyeing: add 150%×100kg=150kg water at 55°C to the drum, add 0.8%×100kg=0.8kg formic acid, and rotate for 20 minutes; add leather brilliant blue B0.6%×100kg=0.6kg, With embodiment 1;

[0038] Finishing and finish...

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PUM

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Abstract

The invention provides a manufacturing method for high-strength calfskin for a special purpose. Calf wet blue which is evenly shaved through a conventional process is used as a raw material, the raw material is weighed, returned to water, degreased, retanned, neutralized, filled with grease and top-dyed, and then the raw material is sorted and coated according to the conventional process. In the retanning working procedure, tannin extract is used and combined with phthalidyl / peptide bonds on a polypeptide chain of skin collagen through hydrogen bonds, and therefore raw hide is changed into leather; fatty aldehyde is added in the retanning working procedure, carbonyl in the fatty aldehyde reacts with amidogen in skin collagen fiber, the skin collagen fiber is further fixed, and the defects existing in tannin extract tanning are overcome; and non-chrome retanning is performed, the fatty aldehyde is used for replacing a chrome tanning agent, and therefore chrome pollution is greatly reduced. The fatty aldehyde is added in the greasing working procedure, so that the fullness and the softness of the leather are improved, the alkali resistance and the laundering durability of the leather are improved, and the shrinkage temperature of the leather is increased. The tensile strength of the calfskin manufactured through the method is 19 N / mm<2> and the tearing strength is increased to 72 N / mm and the tensile strength and the tearing strength of the calfskin are increased by 26.7% and 10.77% compared with those of calfskin produced through an existing process.

Description

technical field [0001] The invention belongs to the leather industry, in particular to a method for making high-strength calf leather for special purposes. Background technique [0002] Calf skin has small pores and clear texture. The processed leather feels soft and delicate, has good toughness, and has high use value. However, due to its finer fibers, its weaving degree is larger and the cowhide is looser, and the strength of the finished leather is not as good as that of large cowhide. [0003] Leather products are far superior to ordinary textile and clothing products in terms of warmth retention, wear resistance, tensile strength, tensile strength, and tear resistance. Leather products have served special industries such as the military, armed police, protocol, civil aviation, and mines for many years. When pilots perform missions at high altitudes, they are often affected by factors such as air pressure, temperature, and gravity, and flight suits are easy to wear and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C1/00C14C1/08C14C3/16C14C9/02C14C3/02D06P3/32
Inventor 郑海涛司利董军
Owner JIHUA 3512 LEATHER & GARMENT
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