Chrome-free Tanning Technology of Sheep Leather and Sheep Wetwhite and Sheep Leather

A processing technology, chrome-free tanning technology, applied in leather/skin/leather/hide chemical treatment equipment, small raw hide/large raw hide/leather skin/fur chemical treatment, small raw hide/large raw hide/leather/fur treatment, etc. It can solve the problems of unfavorable environmental protection, depletion, and large pollution of chrome tanning, and achieve the effects of excellent air permeability, good storage resistance, and high safety

Active Publication Date: 2021-09-24
辛集市凌爵皮革有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, the reserves of chromium in the world are limited after all, and my country’s chromium resources are not abundant, and it is an unavoidable reality that a large amount of use will be exhausted; Chromium-containing wastewater and chrome leather shavings, which is not conducive to environmental protection

Method used

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  • Chrome-free Tanning Technology of Sheep Leather and Sheep Wetwhite and Sheep Leather
  • Chrome-free Tanning Technology of Sheep Leather and Sheep Wetwhite and Sheep Leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A processing technology for chrome-free tanning of sheep leather, which comprises the following processing steps:

[0039] 1. Salt throwing of raw skins: Put the raw skins into the tumbler to rotate, and turn out the salt in the raw skins;

[0040] 2. Soak in water

[0041] 2.1. Pre-soaking water: Select the six raw skins with a total weight of 21kg and put them into the drum; add 200% water at 20°C to the drum, add 0.4% anionic surfactant, 0.1% fungicide and 0.4% soda ash, turn for 5 hours, drum out, and remove the flesh from the fur;

[0042] 2.2. Main immersion: Put the skins after fleshing into an empty drum, add 200% of water at 20°C, add 0.5% of anionic surfactant, 0.2% of fungicide and 0.6% of inorganic alkali, turn for 22 hours, and take out the drum. For horses, control water for 3 hours;

[0043] 3. Alkali depilation: add sodium sulfide and water to prepare lye with two concentrations of 180g / L and 30g / L, add calcium hydroxide respectively, and adjust the c...

Embodiment 2

[0054] A processing technology for chrome-free tanning of sheep leather, which comprises the following processing steps:

[0055] 1. Salt throwing of raw skins: Put the raw skins into the tumbler to rotate, and turn out the salt in the raw skins;

[0056] 2. Soak in water

[0057] 2.1. Pre-soaking water: select the six raw skins with a total weight of 21kg and put them into the drum; add 200% water at 23°C to the drum, add 0.4% anionic surfactant, 0.1% fungicide and 0.4% soda ash, turn for 6 hours, take out the drum, and remove the flesh from the fur;

[0058] 2.2. Main immersion: Put the skins after fleshing into an empty drum, add 200% water at 22°C, add 0.5% anionic surfactant, 0.2% fungicide and 0.6% inorganic alkali, turn for 26 hours, and take out the drum. For horses, control water for 4 hours;

[0059] 3. Alkali depilation: add sodium sulfide and water to prepare lye with two concentrations of 180g / L and 30g / L, add calcium hydroxide respectively, and adjust the conc...

Embodiment 3

[0070] A processing technology for chrome-free tanning of sheep leather, which comprises the following processing steps:

[0071] 1. Salt throwing of raw skins: Put the raw skins into the tumbler to rotate, and turn out the salt in the raw skins;

[0072] 2. Soak in water

[0073] 2.1. Pre-soaking water: Select the six raw skins after the above-mentioned salt drop, with a total weight of 21kg, and put them into the drum; add 200% of 25°C water to the drum, add 0.4% anionic surfactant, 0.1% fungicide and 0.4% soda ash, turn for 7 hours, drum out, and remove the flesh from the fur;

[0074] 2.2. Main immersion: Put the skins after fleshing into an empty drum, add 200% of water at 25°C, add 0.5% anionic surfactant, 0.2% bactericide and 0.6% inorganic alkali, turn for 30 hours, and take out the drum. For horses, control water for 5 hours;

[0075] 3. Alkali depilation: add sodium sulfide and water to prepare lye with two concentrations of 180g / L and 30g / L, add calcium hydroxide...

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Abstract

The invention relates to a processing technology for chrome-free tanning of sheep leather, which comprises the following processing steps in sequence: soaking in water, plucking with alkali, liming, deliming and softening, degreasing, pickling tanning, retanning and dyeing, finishing and finishing; In the pickling tanning step, the chrome-free tanning agent TWLZ is used to tan the degreased leather without chrome to obtain wet white leather, which is retanned and dyed, finished and finished to obtain sheep leather; the chrome-free tanning process has been successfully Applied to sheep leather to produce wet white leather and sheep leather. The tanning process does not produce chromium-containing wastewater and chrome leather shavings, which is green and environmentally friendly; the shrinkage temperature of the prepared wet white leather can reach up to 95°C, and the performance is good; the whiteness is good, and a No discoloration within one year, good storage resistance, yellowing resistance level 4; finished sheep leather has good air permeability, and the shrinkage temperature can reach above 90°C.

Description

technical field [0001] The invention relates to the technical field of sheep leather processing, in particular to a chrome-free tanning process of sheep leather, sheep wet white leather and sheep leather. Background technique [0002] Leather is denatured and non-perishable animal skin obtained through physical and chemical processing such as depilation and tanning. It has a special grain layer on the surface, which has natural grain and luster, and feels comfortable. The leather processing technology mainly includes two processes: water field and dry field. The water field mainly includes immersion, hair removal, deliming, alcoholysis, pickling, chrome tanning, dyeing, fatliquoring and skinning. The semi-finished leather after skinning can directly produce suede leather and suede leather; the drying field mainly includes Rewetting, softening or softening, buffing, surface finishing and embossing, finally the finished leather is obtained. [0003] In leather processing, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C1/06C14C1/04C14C1/08C14C3/02C14C5/00C14C15/00
CPCC14C1/04C14C1/06C14C1/08C14C3/02C14C5/00C14C15/00
Inventor 温卫领
Owner 辛集市凌爵皮革有限责任公司
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