A method for producing low-odor clean automobile interior leather with biological enzyme technology
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A technology for automobile interiors and production methods, applied in the application, small raw hide/large raw hide/leather/fur treatment, small raw hide/large raw hide/leather hide/fur chemical treatment, etc., can solve the problem of increasing treatment difficulty, pollution, etc. question
Active Publication Date: 2021-09-14
HAINING SENDE LEATHER +1
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Depilation and hair removal methods have caused serious pollution to the environment, especially sulfur pollution, which has increased the difficulty of treatment
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[0017] The production process of the present invention is described in detail below:
[0018] The production method of the present invention comprises the steps of fleshing, liming, deliming, softening and degreasing, pickling, tanning, retanning, dyeing, fatliquoring, drying, softening, primer coating, middle coating, embossing and top coating, in:
[0019] The liming uses biological enzyme products, auxiliary agents and basic chemical auxiliary materials in order to remove the epidermis, cow hair and original oil in the raw hide. The specific steps of liming are as follows: after soaking in water and scraping oil, weigh the fur and put it into the drum. Based on 100 parts of tare weight, add 150 parts of normal temperature water, control the temperature at 23-24 °C, and add 0.15 parts of lipase BLE- F, add 0.15 parts of depilatory enzyme X-Zyme UF, add 1.2 parts of liming aid UAC and react for 60 minutes, add 0.5 parts of lime, react for 60 minutes, add 1.2 parts of NaHS fo...
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Abstract
The invention relates to a method for producing low-odor and clean automotive interior leather by bio-enzyme technology, including fleshing, liming, deliming, softening and degreasing, pickling, tanning, retanning, dyeing, fatliquoring, drying, wrestling Softening, primer coating, middle coating, embossing, top coating and other steps. The present invention introduces a kind of biological enzyme to be used before raw hide pretreatment, tanning and retanning, which improves the efficiency of processes such as liming and depilation, degreasing and deodorization, and reduces the use of strong acids and alkalis, a large amount of surfactants and the generation of pollutants; At the same time, because the effect of degreasing treatment is strengthened, the protective effect on the leather fiber structure is obvious, and the problems such as loose surface of the product are improved. The leather obtained by using new technology and new materials is completely degreased, and the fiber interstitial removal effect is good, and the product has low odor. Low emission characteristics such as low fogging.
Description
technical field [0001] The invention belongs to the technical field of new materials, in particular to a method for producing low-odor and clean automotive interior leather by biological enzyme technology. Background technique [0002] Depilation is a very important process in car seat leather tanning. The purpose of depilation is to remove hair and epidermis. This process is one of the main sources of pollution in tanning. Using the traditional sodium sulfide hair removal method, the general liquid ratio is 2.0-3.0, lime 3%, sodium sulfide 3%, sodium sulfide only consumes 50-55% of the amount used in the liming process, and lime only consumes 40-45% of the amount used , a large amount of sodium sulfide and lime remain in the wastewater. Domestic general tanning enterprises have to discharge 3-5m for every ton of leather produced 3 The dehairing and liming waste liquid, the BOD value in the waste liquid is as high as 5000-10000mg / L. The COD value is as high as 1000-25000...
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