Animal fur complex enzyme depilatory and application thereof

An animal skin and depilatory technology, applied in the field of animal skin depilator and animal skin depilation, can solve problems such as long depilation time, incomplete removal of hair, damage to leather grain surface, etc., to reduce pollution load, improve use value, eliminate The effect of pollution

Active Publication Date: 2008-08-06
SICHUAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a compound enzyme depilatory and its application in view of the deficiencies of the prior art, so as to solve the problem of ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1—Pigskin Rolling Enzyme, Applying Enzyme and Stacking Depilation

[0034]The optimum pH value is 6.5-8.5, 10kg of 1398 protease with an activity of 50,000 units / g, and 0.5kg of elastase with an activity of 50,000 units / g; the optimum pH value is 6.5-11, and an activity of 50,000 Unit / g lipase Ultra G sold by Novozymes 2kg; calcium chloride 2kg; sodium lauryl sulfate 3kg; disodium hydrogen phosphate 10kg; sodium tripolyphosphate 5kg; sodium silicate 5kg; wood powder 5kg; 20kg of ammonium sulfate; 38kg of sodium sulfate, mixed evenly, promptly made animal skin compound hair removal enzyme preparation.

[0035] Take 100kg of pigskin soaked in water and degreased according to the conventional method, add it to the drum, and adjust the temperature to about 30°C. After controlling the water, add 4kg of sodium chloride and 0.15kg of bactericidal preservative into the drum, and rotate for about 30 minutes. Add 0.5kg of compound depilatory enzyme preparation prepared a...

Embodiment 2

[0036] Embodiment 2——Goat skin coated with enzyme depilation

[0037] The optimum pH value is 8-10, 5kg of Novocor SG protease produced by Novozymes with an enzyme activity of 200,000 units / g, and 0.3kg of elastase with an activity of 50,000 units / g; the optimum pH value is 8 -12, lipase Greasex produced by Novozymes with an activity of 50,000 units / g 1kg; calcium chloride 1kg; Pingpingjia 3kg; disodium hydrogen phosphate 10kg; sodium tripolyphosphate 5kg; sodium silicate 5kg; 5kg; 65kg of sodium sulfate, mixed evenly to prepare a compound depilatory enzyme preparation.

[0038] Take 100kg of goat skin soaked in water and de-fleshed according to the conventional method, add it to the drum, and adjust the temperature to about 25°C. After controlling the water, add 5 kg of sodium sulfate and 0.1 kg of bactericidal preservative into the drum, and rotate for about 60 minutes. Take out the skins, stack them one by one, and let them stand for dripping for about 3 hours. Take by we...

Embodiment 3

[0039] Embodiment 3 There is a bath in the yellow cowhide drum for depilation

[0040] The optimum pH value is 8-11, the enzyme activity is 250,000 units / g, 3kg of Pyrase 250MP protease produced by Novozymes, and 0.1kg of elastase with an activity of 50,000 units / g; the optimum pH value is 8- 12. Lipase Ultra G produced by Novozymes with an activity of 50,000 units / g 0.5kg; calcium chloride 1kg; Pingpingjia 3kg; disodium hydrogen phosphate 10kg; sodium tripolyphosphate 5kg; powder 5kg; sodium sulfate 70kg, mix evenly, promptly make compound depilatory enzyme preparation.

[0041] Take 100kg of yellow cowhide soaked in water according to the conventional method, add 80kg of water and 7kg of sodium chloride into the drum, rotate for about 10 minutes at about 20°C, add 0.5kg of formic acid, rotate for about 20 minutes, and then add 1kg of sulfuric acid , rotate for about 120 minutes, let it stand for about 8 hours, then add 2kg of soda ash, adjust the pH value to about 8, pour o...

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PUM

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Abstract

The invention discloses an animal skin compound enzyme depilatory and the application of the depilatory. The depilatory comprises compound unhairing enzyme and additive, wherein components of the compound unhairing enzyme comprise neutral protease or alkaline protease 5-20 parts by weight, elastase 0.1-10 parts by weight and lipase 0.5-15 parts by weight. The compound enzyme depilatory which is provided by the invention can be suitable for unhairing with piled enzyme unhairing methods, piled enzyme coating unhairing methods and barrate inside bath unhairing methods in the manufacturing process of various common animal skins and leathers for various applications. The compound enzyme depilatory which is provided by the invention solves the technical problems in an existing technique that enzyme depilatory has large enzyme consumption, long unhairing time and large collagen loss, grain tightness of leathers is easily broken, the leathers are hollow and loosened, hairs can not be completely removed and the like. The pollution of sulphide is eliminated radically, and simultaneously the use value of the hairs is also increased.

Description

1. Technical field [0001] The present invention relates to animal skin depilation technology, more specifically, relates to a kind of animal skin depilatory agent containing depilatory enzyme and auxiliary agent, is used for realizing the sulfide-free biological depilation of leather raw material skin, is suitable for the depilation of all animal skins, belongs to Clean leather production field. 2. Background technology [0002] In the tanning process, the hair on the raw hide is useless, so the removal of hair is one of the main purposes of the tanning preparation section. The traditional hair removal method based on sulfide (sodium sulfide and sodium hydrogen sulfide) and lime has been widely used due to its advantages of easy availability of materials, low cost, simple operation, easy control, and high hair removal efficiency, and it is still It is the main depilation method in the industrial production of tanning. However, this method consumes a large amount of sulfide...

Claims

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Application Information

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IPC IPC(8): C14C1/06C12S7/00
Inventor 彭必雨严建林石碧
Owner SICHUAN UNIV
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