CN104498647A

CN104498647A - Enzyme preparation capable of reducing leather damage

Info

Publication number: CN104498647A
Application number: CN201410776574.8A
Authority: CN
Inventors: 林斌生
Original assignee: GUANGDONG FION LEATHER PRODUCT Co Ltd
Current assignee: GUANGDONG FION LEATHER PRODUCT Co Ltd
Priority date: 2014-12-17
Filing date: 2014-12-17
Publication date: 2015-04-08

Abstract

The invention relates to an enzyme preparation capable of reducing leather damage and belongs to the technical field of leather processing. According to the enzyme preparation disclosed by the invention, alkaline protease extracted from Bacillus pumilus by virtue of submerged fermentation is selected, the collagenase activity therein can be inhibited, the leather damage is reduced, the depilation action is enhanced, the face loosening degree is reduced, the obtained leather is clean in hair removal, the grain side is clear and does not have obvious damage, and the leather body is full, soft and high in elasticity.

Description

A kind of zymin reducing leather damage

Technical field

The present invention relates to a kind of zymin reducing leather damage, belong to leather processing technique field.

Background technology

Tradition process hides main production is made up of following operation: raw material skin, and------depilation liming--softens--deliming--chrome tanning-retanning-dyeing and fat-liquoring-ornamenting-drying and moulding-resultant Leather to fleshing in immersion.In above process, the pollutent of discharge mainly comes from the organism of raw material skin release and the remaining material of failing to be fully utilized of each procedure.The COD that wherein source of pollution of most critical come from sulfide raffinate that the salt that produces in the preservation of raw material skin and decomposition and total nitrogen, depilation liming produce, hairless protein produces and the high ammonia-nitrogen wastewater that organonitrogen, ammonium salt deliming produce and the chromate waste water the like waste that chrome tanning process produces.Meanwhile, there are large quantization labor and materials remaining after every procedure completes in dermatotome, a large amount of clear water need be consumed and be used for washing skin, in addition for the process water of workshop section, make leather processing procedure become high water consumption process.The subject matter of current existence is that water consumption is large, Pollutant levels are high, waste water toxic large, is typical heavy polluted industry.

Pollution in leather industry is mainly from beam house, and the pollution of preparatory stage is main from depilation operation, thus can say that depilation operation is source of pollution maximum in process hides.Depilation in leather-making technology makes hair and epidermis depart from the process of corium by the method for physics, chemistry or biological treatment.Meanwhile, containing a lot of soluble proteinss and interfibrillar substance between the collegen filament of rawhide, after drying, they stick together fiber, make slat hard, not resistance to bending, therefore, also these interfibrillar substances will be removed, loose collegen filament, for subsequent technique creates good conditions in epilation process.

Enzyme unhairing refers in the liming operation of epilation process, proteolytic enzyme is used directly to enter in skin by the flesh noodles of fur or grain, hydrolysis hair sheath, albumen around ball top, thus destroy hair sheath and hair follicle, connecting between ball top with hair papilla, make hair and epidermolysis and reach the effect of depilation.Enzyme unhairing, as a kind of biological process, more meets the theory of world today's environmental protection undoubtedly.China just starts the investigation and application of enzyme unhairing technique on pigskin leather making as far back as the 6's 0 Mos of 2nd 0 century, the beginning of the seventies, but to 80 ~ nineties of 2nd 0 century, enzyme unhairing gradually produced greatly abandon, its major cause is that depilatory zymin specificity is poor, quality is unstable, leather is easily made to occur loose side, flat thin, even rotten skin phenomenon.Enter the requirement of China's nineties in 2nd 0 century to environmental protection day by day to improve, along with the progress of science and technology, Testing and research means are perfect gradually, development, develop and use the novel enzyme preparation efficient, specificity is strong to carry out enzyme unhairing, produce the leatherware with water-fastness, resistance to dry-cleaning attributes.

Chinese invention " reduces the depilation zymin of leather damage ", application number 201110319403.9; Chinese invention " method of amylase and proteolytic enzyme mixing depilation in leather production ", application number 201110319385.4 is all that the enzyme unhairing adopted processes leather.

Bacillus pumilus UN-31-C-42 is that a strain produces the bacterial strain with the Sumizyme MP of depilation function, and the fermented liquid hair removal effect of this bacterial strain is good, and collagen hydro activity is very low.

Summary of the invention

The object of this invention is to provide a kind of zymin reducing leather damage, collagenase vigor wherein can be suppressed, reduce the damage to leather.

For realizing the object of foregoing invention, the technical scheme that the present invention takes is as follows:

Reduce the zymin of leather damage: select the Sumizyme MP refined through submerged fermentation by bacillus pumilus, collagenase vigor wherein can be suppressed, reduce the damage to leather.

Present invention also offers a kind of application reducing the zymin of leather damage, comprise the steps:

(1) with lime, hair process is protected to hair bar;

(2) leather sodium sulphite step (1) processed and the Sumizyme MP refined through submerged fermentation by bacillus pumilus destroy hair root, and hair is sloughed.

The invention has the beneficial effects as follows: the present invention selects the Sumizyme MP refined through submerged fermentation by bacillus pumilus, collagenase vigor wherein can be suppressed, reduce the damage to leather, its depilation strengthens, loose side degree reduces, the depilation of gained finished leather is clean, and the clear nothing of grain is obviously damaged, and leather body is plentiful, soft, elasticity is better.

Embodiment

Be described in further details the present invention below by example, these examples are only used for the present invention is described, do not limit the scope of the invention.

Embodiment 1

50kg pigskin in hair root portion with 300g saturated limewater brush, is put into rotary drum, is added 50g sodium sulphite, 40kg water, 0.8% Sumizyme MP refined through submerged fermentation by bacillus pumilus (50u/ml), rotates 12min by 31 DEG C, after 4 ~ 8 hours, go out drum, epilation.

Embodiment 2

50kg ox-hide in hair root portion with 300g saturated limewater brush, is put into rotary drum, is added 50g sodium sulphite, 50kg water, 0.8% Sumizyme MP refined through submerged fermentation by bacillus pumilus (50u/ml), rotates 12min by 38 DEG C, after 4 ~ 8 hours, go out drum, epilation.

Claims

1. reduce a zymin for leather damage, it is characterized in that: select the Sumizyme MP refined through submerged fermentation by bacillus pumilus, collagenase vigor wherein can be suppressed, reduce the damage to leather.

2. reduce an application for the zymin of leather damage, it is characterized in that: comprise the steps:

(1) with lime, hair process is protected to hair bar;