CN108588301A - A kind of method of enzymatically treating of leather blood muscle defect - Google Patents
A kind of method of enzymatically treating of leather blood muscle defect Download PDFInfo
- Publication number
- CN108588301A CN108588301A CN201810232610.2A CN201810232610A CN108588301A CN 108588301 A CN108588301 A CN 108588301A CN 201810232610 A CN201810232610 A CN 201810232610A CN 108588301 A CN108588301 A CN 108588301A
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- Prior art keywords
- leather
- muscle defect
- parts
- blood
- protease
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Classifications
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/08—Chemical tanning by organic agents
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/08—Chemical tanning by organic agents
- C14C3/10—Vegetable tanning
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/08—Chemical tanning by organic agents
- C14C3/10—Vegetable tanning
- C14C3/12—Vegetable tanning using purified or modified vegetable tanning agents
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention discloses a kind of method of enzymatically treating of leather blood muscle defect.The characteristics of this method is, by 100 parts of input rotary drums of tanbark base after shaving, after routinely leather-making technology is rinsed, 50 500 parts of water is added, suitable neutralizer is added under 25 60 °C, rotate 30 minutes or more, the pH for adjusting bath foam stablizes 5.0 9.0；It is added 03 parts of anion surfactant, after rotation 30 120 minutes, adds 0.05 10 parts of protease preparations, lasting rotation or intermittent rotary 1 24 hours, drain, then routinely leather-making technology carries out subsequent operation.This method is carried out loosely and is destroyed to the vascular wall in tanbark base to mitigate/eliminate the blood vessel trace of grain side of leather, moreover, can avoid the problem of leather quality caused by the excess destruction of collagenous fibres declines by using the protease with elastin laminin vigor.The method of the present invention is suitable for the processing of the blood muscle defect of various tanbark bases.
Description
Technical field
It is the present invention relates to a kind of method of enzymatically treating of leather blood muscle defect, more particularly to a kind of by with Protease Treatment tan
Leather base after system belongs to leather biotechnology come the method for solving leather blood muscle defect.
Background technology
Blood muscle is a kind of defect of leather, is primarily referred to as being emerging in the blood vessel trace of leather surface.Wherein, thicker aorta
Blood vessel can cause the blood muscle problem of leather most serious.Blood vessel in animal body is rich in elastomeric fibrous component, and elastomer is due to it
Special cross-linked structure, the elastomer elasticity loss after drying, becomes not only hard but also crisp.The main reason for leading to the problem of blood muscle be
Since the vascular wall in leather is not disperseed and is destroyed, the elastomeric fibrous component in blood vessel is hardened after the drying, after dry
Vascular site becomes " stiff ", and " hardness " is obviously bigger than surrounding collagenous fibres, therefore, after the operations such as flatiron, blood vessel trace
Appear and generates blood muscle phenomenon.
It is traditional since the particularity of vascular components and structure, especially elastomer have stronger acidproof and alkali resistance
Chemical method can not effectively destroy blood vessel.Some protease have destruction to the elastomeric fibrous component in rawhide, but such as
Fruit destroys blood vessel in beam house with protease, often causes finished leather to the over effect of collagenous fibres due to protease
The decline of quality.Therefore, the leather base processed through traditional beam house treatment technology, since blood vessel is more completely retained, blood
The more apparent problem more universal as leather of muscle.
The wet dyeing and finishing workshop section of base is removed from office after tanning, it is to pass through reinforcement to mitigate the main thought of blood muscle phenomenon and method at present
Filling improves the degree of packing and " hardness " of leather, reduce vascular site and around it collagenous fibres " hardness " difference, and increase
The thickness of skin is covered or mitigates blood vessel in appearing at grain.But this method is a kind of passive settling mode, be with
The pliability for sacrificing leather is cost, moreover, excessive filling has the physical-mechanical properties of finished leather certain negative effect,
It is not applicable that obvious this method requires high leather to pliability.
Solve the problems, such as that the mode of blood muscle should be carried out loose to the vascular wall in tanbark base and destroy, by improving blood
The pliability of pipe structure reduces its performance difference between collagen fiber structure around to mitigate the blood vessel trace of grain side of leather.
As previously mentioned, elastomer has higher stability, it is difficult to be destroyed by chemical method, but the albumen with elastin laminin vigor
Enzyme can be catalyzed its hydrolysis, therefore, can be handled it in the enzyme bating process choosing protease appropriate of tanbark base.
The processing of beam house protease can cause the excessive loss of collagen component, however, for tanbark base, tanned collagen
For fiber since side-chain radical is combined with tanning agent molecule, albumen interchain produces crosslinked action, and protein structure stability improves, but
That elastin laminin is few to the binding capacity of tanning agent, " tanning " effect of the elastomer in tanbark base much not as good as collagenous fibres,
Therefore, the resistance to enzymatic of the collagenous fibres in tanbark base is apparently higher than elastomer.So can have stronger bullet by selection
The Protease Treatment tanbark base of property protein vigor, destroys the elastomer of vascular wall, vascular site is made to be disperseed, reach and subtract
The purpose of the blood muscle defect of gently/elimination leather.Simultaneously as tanned collagenous fibres have higher resistance to enzymatic, at enzyme
During reason, the problem of leather quality caused by the excess destruction of collagenous fibres declines can avoid.Therefore, according to blood vessel in leather
The composition and structure of wall targetedly develops enzyme treatment technique, the blood muscle defect of mitigation/elimination leather, to improving leather
The quality of product is very required.
Invention content
A kind of method of enzymatically treating of leather blood muscle defect is provided it is an object of the invention to overcome the deficiencies in the prior art,
It is poor with the effect for solving chemical method solution blood muscle phenomenon in existing leather making process, the same of Protease Treatment blood vessel is used in beam house
When, be susceptible to due to collagenous fibres destroy it is serious, caused by the empty pine of finished leather and the problems such as grain damage.
The basic characteristics of the present invention are, with the neutrality and/or alkali protease compared with strong elasticity protein vigor（Acid egg
White enzyme does not have elastin laminin vigor generally）, tanbark base is handled under the higher ph that tanbark base can be born, and destroys blood
The elastomer of tube wall, makes vascular site be disperseed, and improves the pliability of blood vessel structure, reduces it between collagen fiber structure
Performance difference, achieve the purpose that the blood muscle defect of mitigation/elimination leather.Simultaneously as tanned collagenous fibres have more
High resistance to enzymatic, and protease inhibition is come to the hydrolysis vigor of leather collagen by using anion surfactant and is swashed
Living protein enzyme can avoid glue to the hydrolysis vigor of elastin laminin in Animal Skin while reinforcing to elastomer treatment effect
The problem of leather quality caused by the excess destruction of fibrinogen declines.
Realize that a kind of method of enzymatically treating of leather blood muscle defect of above-mentioned purpose of the present invention, forecast scheme configuration include（It is used
Material unless otherwise specified, in parts by mass）：By in 100 parts of input rotary drums of tanbark base after shaving, routinely process hides
After technique is rinsed, 50-500 parts of water is added, under 25-60 °C, suitable neutralizer is added, rotate 30 minutes or more, it adjusts
The pH for saving bath foam stablizes in 5.0-9.0；0-3 parts of anion surfactant is added, after rotating 30-120 minutes, adds
0.05-10 parts of protease preparations, lasting rotation or intermittent rotary 1-24 hours, drain；It is pressed again by the leather base of above-mentioned processing normal
It advises leather-making technology and carries out subsequent operation.
In the above-mentioned technical solutions, the protease be have elastin laminin hydrolysing activity neutral proteinase and/or
Alkali protease；Preferably alkali protease.
In the above-mentioned technical solutions, the protease preparation comes from the neutral protein of animal, plant or microorganism
Enzyme and/or alkali protease.
In the above-mentioned technical solutions, the neutralizer be sodium bicarbonate, ammonium hydrogen carbonate, neutralizing retanning agent, sodium formate and
At least one of sodium acetate can be the solution addition for being directly added into or being made into suitable concentration.
In the above-mentioned technical solutions, the anion surfactant is long chain alkyl sulfates, chain alkyl sulfonic acid
At least one of salt；The long chain alkyl sulfates are preferably sodium sulfate of polyethenoxy ether of fatty alcohol or dodecyl sulphate
Sodium, the long chain alkyl sulphonates are preferably neopelex, sodium secondary alkyl sulfonate or dioctyl sodium sulphosuccinate.
In the above-mentioned technical solutions, the pH value control range of the enzymatic treatment process is 5.0-9.0；For chrome tanning, nothing
The preferred pH value range of leather base of machine metal salt tan is 5.0-7.0, is for the preferred pH value range of organic tanning agent tanbark base
7.0-9.0。
In the above-mentioned technical solutions, the temperature controlling range of the enzymatic treatment process is 25-60 °C；Preferred temperature model
Enclose is 35-45 °C
In the above-mentioned technical solutions, the tanbark base is the wet blue leather by chrome tanning, or for by inorganic metal salt tan, plant
The white wet leather of the organic tanning agents tannings such as object tan, aldehyde tannage, organic phosphine tan, or the leather that is obtained for above two and a variety of tannage Combined tannings
Base.
Compared with prior art, the invention has the advantages that：
A kind of enzymatic treatment new method of leather blood muscle defect provided by the invention, this method use the egg with elastin laminin vigor
White enzyme acts on the elastic protein fiber ingredient of tanbark base medium vessels wall, by the way that vascular wall fiber is disperseed and broken
It is bad, it improves the pliability of leather base blood vessel structure, reduce its performance difference between collagen fiber structure to mitigate grain side of leather
Blood vessel trace.It is better than the effect of existing chemical treatment method.
A kind of enzymatic treatment new method of leather blood muscle defect provided by the invention, this method utilize the collagen in tanbark base
The resistant protease functionality of fiber be higher than elastomer, and by with anion surfactant come protease inhibition to leather glue
The hydrolysis vigor and activator protein enzyme of former albumen to the hydrolysis vigor of elastin laminin in Animal Skin, make protease to elastomer into
Row selectivity is total to be used, and leather loose side caused by the excess destruction of collagenous fibres and grain damage and other issues are can avoid.
A kind of method of enzymatically treating of leather blood muscle defect provided by the invention, this method blood vessel in enzymatic treatment leather
Meanwhile the elastomer structure of collagenous fibres and grain layer has also obtained the loose of appropriateness, is conducive to follow-up retanning, dyeing and adds
The absorption, infiltration and combination of material, can be improved the pliability and uniformity of leather in the processes such as fat.
A kind of method of enzymatically treating of leather blood muscle defect provided by the invention, this method do not change original leather and add substantially
Work flow, it is simple, convenient, it is easy to implement.
Description of the drawings
Fig. 1 is the blood vessel structure figure in wet blue leather not enzyme treated in embodiment 1（40×）.
Fig. 2 be embodiment 1 in it is enzyme treated after wet blue leather in blood vessel structure figure（40×）.
Fig. 3 be embodiment 3 in it is enzyme treated after glutaraldehyde tanning in blood vessel structure figure（40×）.
Specific implementation mode
The present invention is specifically described below by embodiment, it is necessary to which indicated herein to be, the present embodiment is only used
In invention is further explained, it should not be understood as limiting the scope of the invention, the people that is skilled in technique in the field
Member can make some nonessential modifications and adaptations according to the content of aforementioned present invention.The source of agents useful for same, trade name with
And it is necessary to list its constituent person, indicates on the first appearance.
Embodiment 1 --- the enzymatic treatment of ox-hide sofa chrome leather blood muscle defect
By in the ox-hide sofa chrome leather leather base 100kg input rotary drums after routinely technique rewetting, rinsing, add water 100kg, temperature adjustment
To 45 °C, after sodium bicarbonate adjusting bath foam pH value to 6.5, protease DOWELLZMYE HR are added（Sichuan reaches prestige science and technology share
Co., Ltd）, a concentration of 20-25 U/mL of elastin laminin enzyme activity in bath foam（Elastin substrate method measures）, continuous rotation
After 3.5 h, gap rotation rotates 10 minutes, amounts to 16 h, drain per hour.Enter subsequent processing according to technique.
Control experiment：It is essentially identical with aforesaid operations, the difference is that being not added with protease.
Blood vessel structure in not enzyme treated wet blue leather is as shown in Figure 1, blood vessel elasticity fibre structure is such as after enzyme processing
Shown in Fig. 2, the results showed that, method using the present invention, remove from office base blood vessel structure obtain it is good loose, at the blood muscle of grain
Defect is significantly improved.
Embodiment 2 --- the enzymatic treatment of cow leather upper wet blue leather blood muscle defect
By in the cow leather upper wet blue leather leather base 100kg input rotary drums after routinely technique rewetting, rinsing, add water 150kg, temperature adjustment
To 40 °C, after sodium bicarbonate adjusting bath foam pH value to 6.0, appropriate alkali protease DOWELLZMYE LM are added（Sichuan reaches prestige
Science and Technology Co., Ltd.）, a concentration of 10-15 U/mL of elastin laminin enzyme activity in bath foam（Elastin substrate method measures）,
After rotating 4h, drain.
Control experiment：It is essentially identical with aforesaid operations, the difference is that being not added with protease.
By the leather base for testing sample and control sample by identical common process retanning, stuffing, drying, fall it is soft after, with standard side
Method measures mechanical performance, the results are shown in Table 1.The result shows that method using the present invention, after enzymatic treatment, lacked at the blood muscle of grain
Fall into is improved well, also, the mechanical performance of leather and pliability are above control sample.
Crust leather mechanical performance after 1 enzymatic treatment of table
Embodiment 3 --- ox-hide glutaraldehyde tanning automobile cushion removes from office the enzymatic treatment of blood muscle defect
By in the ox-hide sofa glutaraldehyde tanning leather base 100kg input rotary drums after routinely technique rewetting, rinsing, add water 150
After sodium carbonate adjusting bath foam pH value to 8.5, appropriate alkali protease is added to 45 °C in kg, temperature adjustment（Shandong Long Kete enzyme preparations
Co., Ltd）, a concentration of 20-25 U/mL of elastin laminin enzyme activity in bath foam（Elastin substrate method measures）, rotate 8h
Afterwards, drain.Enter subsequent processing according to technique.
Control experiment：It is essentially identical with aforesaid operations, the difference is that being not added with protease.
Blood vessel elasticity fibre structure is as shown in Figure 3 after base enzymatic treatment is removed from office in glutaraldehyde tanning, the results showed that, it is using the present invention
Method, the blood vessel structure for removing from office base are seriously destroyed, and are improved well at the blood muscle defect of grain.
Claims (8)
1. a kind of method of enzymatically treating of leather blood muscle defect, it is characterised in that this approach includes the following steps（Each operating procedure institute
Unless otherwise indicated with material, in parts by mass）：By in 100 parts of input rotary drums of tanbark base after shaving, routinely make
After leather technique is rinsed, 50-500 parts of water is added, under 25-60 °C, suitable neutralizer is added, rotate 30 minutes or more,
The pH for adjusting bath foam stablizes in 5.0-9.0；0-3 parts of anion surfactant is added, after rotating 30-120 minutes, adds
0.05-10 parts of protease preparations, lasting rotation or intermittent rotary 1-24 hours, drain；It is pressed again by the leather base of above-mentioned processing normal
It advises leather-making technology and carries out subsequent operation.
2. a kind of method of enzymatically treating of leather blood muscle defect according to claim 1, it is characterised in that the protease is
Neutral proteinase with elastin laminin hydrolysing activity and/or alkali protease.
3. a kind of method of enzymatically treating of leather blood muscle defect according to claim 1, it is characterised in that the protease
Preparation comes from the neutral proteinase and/or alkali protease of animal, plant or microorganism.
4. a kind of method of enzymatically treating of leather blood muscle defect according to claim 1, it is characterised in that the neutralizer
Can be directly added into or match at least one of sodium bicarbonate, ammonium hydrogen carbonate, neutralizing retanning agent, sodium formate and sodium acetate
It is added at the solution of suitable concentration.
5. a kind of method of enzymatically treating of leather blood muscle defect according to claim 1, it is characterised in that the anion
Surfactant is at least one of long chain alkyl sulfates, long chain alkyl sulphonates.
6. a kind of method of enzymatically treating of leather blood muscle defect according to claim 1, it is characterised in that enzymatic treatment process
PH value control range is 5.0-9.0.
7. a kind of method of enzymatically treating of leather blood muscle defect according to claim 1, it is characterised in that enzymatic treatment process
Temperature controlling range is 25-60 °C.
8. according to a kind of method of enzymatically treating of leather blood muscle defect described in claim 1 to 7, it is characterised in that this method is suitble to
In the wet blue leather by chrome tanning, or for by organic tanning agents tannings such as inorganic metal salt tan, vegetable tanning, aldehyde tannage, organic phosphine tans
White wet leather, or the leather base that is obtained for above two and a variety of tannage Combined tannings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810232610.2A CN108588301A (en) | 2018-03-21 | 2018-03-21 | A kind of method of enzymatically treating of leather blood muscle defect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810232610.2A CN108588301A (en) | 2018-03-21 | 2018-03-21 | A kind of method of enzymatically treating of leather blood muscle defect |
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| CN108588301A true CN108588301A (en) | 2018-09-28 |
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| CN201810232610.2A Pending CN108588301A (en) | 2018-03-21 | 2018-03-21 | A kind of method of enzymatically treating of leather blood muscle defect |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116622919A (en) * | 2023-07-06 | 2023-08-22 | 四川大学 | Method for preparing transparent leather by adopting chrome-free tanning blank |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105132600A (en) * | 2015-08-21 | 2015-12-09 | 四川大学 | Method for regulating selectivity function of protease to collagen and elastin in animal skin |
-
2018
- 2018-03-21 CN CN201810232610.2A patent/CN108588301A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105132600A (en) * | 2015-08-21 | 2015-12-09 | 四川大学 | Method for regulating selectivity function of protease to collagen and elastin in animal skin |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116622919A (en) * | 2023-07-06 | 2023-08-22 | 四川大学 | Method for preparing transparent leather by adopting chrome-free tanning blank |
| CN116622919B (en) * | 2023-07-06 | 2024-05-24 | 四川大学 | Method for preparing transparent leather by adopting chrome-free tanning blank |
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Application publication date: 20180928 |
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