CN107619887A - A kind of method for leather-making for protecting hair depilation - Google Patents
A kind of method for leather-making for protecting hair depilation Download PDFInfo
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Abstract
The application is related to tanning technology field, more particularly to a kind of method for leather-making for protecting hair depilation.The application specifically includes following steps：Pre- immersion；Fleshing；Main immersion；Depilation, liming；Lime-fleshing, cut open layer.Hydroxycarbamide compound L M and the organic chelated alkali of swelling agent LS are used to protect in hair liming technique by the application, it can reduce by grey alkaline process liming technique 66.6% sulfide dosage, reduce by 74.3% lime consumption, reduce by during liming 80% COD discharges, and finished leather still has superperformance.
Description
Technical field
The application is related to tanning technology field, more particularly to a kind of method for leather-making for protecting hair depilation.
Background technology
Process hides is well-known heavy polluted industry, and depilation liming process is that it produces the primary technique ring of huge pollution
Section, caused pollutant accounts for more than the 60% of whole leather making process gross contamination discharge capacity herein.
At present, the external academic research for protecting hair dehairing process is more.Sirolime methods are that relatively early and popularization occur to make
Guarantor's hair dehairing process, succeeded in developing by Australian CSIR O in 1981.Technique is divided into NaHS dipping, hypochlorous acid
Calcium aoxidizes, lime activation, machinery depilation, five processes such as liming.Sirolime methods can reclaim substantial amounts of hair, and waste liquid is easy to real
Now recycling, finished leather performance is more or less the same with traditional grey subtraction, but requirement of this method to equipment is high, and in technical process
There is the danger for producing H2S gases.Later people are improved this technique, replace part NaHS to carry out with organosulfur compound
Hair depilation is protected, but because organosulfur compound is mainly TGA, its price is high, it is high to equipment requirement, so as to have impact on this
Technique is widely popularized use, and the auxiliary liming agent containing organosulfur compound mainly has BASF AG in the market
The grade commodity of Merpin 8018 of Erhavit HS and Erhavit FS, the Carpetex companies of Mollescal SF, TFL companies.
The domestic innovation research to protecting hair depilation auxiliary agent is less, and the improvement or enzyme for mainly continuing to use organic sulfur dehairing process take off
The improvement of hair technique.Institute of Environmental Chemistry, Chinese Academy of Sciences proposed technology of de-hairing with triethanolamine in 1985, can eliminate vulcanization
Pollution of the thing to environment, due to manually to push away hair, labor intensity is big, and hair removal effect is incomplete, thus fails to promote the use of.
In view of this, a kind of both to have can guarantee that the generation that pollution in leather industry thing is greatly reduced, the work that and can reduces worker is strong
The research and development of guarantor's hair dehairing process of the quality of degree and raising resultant Leather are very necessary.
The content of the invention
This application provides it is a kind of protect hair depilation method for leather-making, with solve in the prior art pollution in leather industry thing to environment
Pollution and production cost it is too high the problem of.
Therefore, the invention provides following technical proposals：
A kind of method for leather-making for protecting hair depilation, it is mainly included the following steps that：
Step 1：Pre- immersion；Wherein liquor ratio 250%, bactericide 0.1%, SINOBEAM S10 0.3%, soda ash 0.5%,
Immersion 3 hours, rotate 1 hour, survey pH value 9.0 or so, then rotate 10 minutes per hour, overnight；Next day, turn 30 minutes, row
Liquid, wash once, while Recycling of waste liquid；
Step 2：Fleshing；
Step 3：Main immersion；Wherein liquor ratio 250%, 20 DEG C of temperature, bactericide 0.1%, SINOBEAM S10 0.3%,
Soda ash 0.5%, degreasing agent 0.3%, rotate 2 hours, survey pH value 9.2 or so, then rotate 10 minutes per hour, overnight；Next day,
Turn 30 minutes, discharge opeing, stay 50% liquor ratio, while Recycling of waste liquid；
Step 4：Depilation, liming；Wherein liquor ratio 50%, add 1%SINOBEAM LS, rotate 30 minutes, generation is protected hair
Effect；1.5%SINOBEAM LM are added, are rotated 60 minutes, hair root loosens；Add akali sulphide 0.8%, rotate 60 minutes, the big portion of hair
Come off；Pulverized limestone 1% is added to rotate 30 minutes；Add degreasing agent 0.3%, add 25 DEG C of water 100%, rotate 30 minutes, then add 25 DEG C of water
100%, rotate 60 minutes, then turn per hour 5 minutes, overnight；Next day turns 30 minutes, filters hair, discharge opeing, while Recycling of waste liquid；
Step 5：Lime-fleshing, cut open layer.
Further, the SINOBEAM S10 used in the step 1 and step 3 are immersion agent；It is non-ionic surface
The mixture of activating agent and a variety of hydrophilic compounds.
Further, the SINOBEAM LS used in the step 4 are organic chelated alkali, and the SINOBEAM LS are equal
Slowly hydrolyzed after even infiltration, produce enough hydroxyls, with the progress of hydrolysis, the isoelectric point of hide fiber changes, and makes skin
Slow water-filling even inflation.
Further, the SINOBEAM LM used in the step 4 are Hydroxycarbamide organic compound, contain active group
Sulfydryl, the sulfydryl have good dissolution to hair and scurf；Also contain active group amido, urea groups and guanidine radicals；It is described
Amido, urea groups and guanidine radicals effectively suppress alkali compounds to oedema caused by the excessive expansion of collagenous fibres, destroy collagen point
Sub interior and intermolecular hydrogen bond, so that conception and the change of state of aggregation occur for collagen, the structure of collagenous fibres becomes not
Stably, penetrated into for other materials inside materials with hide glue fibril and interaction occurs therewith and created conditions.
Further, ' 1%SINOBEAM LS ' are added repeatedly to add in the step 4.
Further, ' 1%SINOBEAM LS ' are added once to add in the step 4.
Further, the step 4 is depilation, liming
Liquor ratio 50%, add 1% lime, rotate 30 minutes, generation is protected capillary effect fruit；1.5%SINOBEAM LM are added, are turned
Dynamic 60 minutes, hair root loosens；Add akali sulphide 0.8%, rotate 60 minutes, the big portion of hair comes off；Pulverized limestone 1% is added to rotate 30 minutes；
Add degreasing agent 0.3%, add 25 DEG C of water 100%, rotate 30 minutes, then add 25 DEG C of water 100%, rotation 60 minutes, then per hour
Turn 5 minutes, overnight；Next day turns 30 minutes, filters hair, discharge opeing, while Recycling of waste liquid.
Further, the step 4 is depilation, liming
Liquor ratio 50%, add 1% lime and SINOBEAM LS mixtures, rotate 30 minutes, generation is protected capillary effect fruit；Add
1.5%SINOBEAM LM, rotate 60 minutes, hair root loosens；Add akali sulphide 0.8%, rotate 60 minutes, the big portion of hair comes off；Add stone
Ashes 1% rotates 30 minutes；Add degreasing agent 0.3%, add 25 DEG C of water 100%, rotate 30 minutes, then add 25 DEG C of water 100%, rotate
60 minutes, then turn per hour 5 minutes, overnight；Next day turns 30 minutes, filters hair, discharge opeing, while Recycling of waste liquid.
The technical scheme that the application provides includes following advantageous effects：
By the way that Hydroxycarbamide compound L M and the organic chelated alkali of swelling agent LS are used to protect in hair liming technique, it is possible to reduce ash
66.6% sulfide dosage in alkaline process liming technique, reduce by 74.3% lime consumption, reduce by during liming 80% COD
Discharge, and finished leather still has superperformance.
Wherein, using immersion agent SINOBEAM S10, it has good hydrophily and the ability of emulsified fat, goes to decontaminate
The ability of stain is also very strong, and the immersion that whole uniformity also can be quickly obtained even if the very high raw material skin of processing fat content is imitated
Fruit.Only there is slight foam, soaked available for paddle-tumble.Good surface-active can be kept in high concentration electrolyte, it is non-
Often be advantageous to the immersion of wet salted hide.
After depilation liming auxiliary agent SINOBEAM LM, the dosage of akali sulphide can be reduced, even without akali sulphide.
Available for without sulphur liming technique.For protecting hair dehairing process, hair root and hair root sheath can be very well removed, the scurf of pelt removes
Must be very clean, wet blue leather color and luster is light because obtained from, is advantageous to produce Buffed leather, water dye leather or dab dressing leather.
SINOBEAM LM special constituent, enable to liming system to imitate the environment of " old lixivium " easily, be advantageous to obtain
Smooth careful grain, opens skin body wrinkle, lifts leather quality, improves yield of leather.Deliquescent salt can be formed with calcium ion,
Calcium ion concentration in solution is improved, effectively scattered fiber, increases leather richness, flexibility.
Finally, there is following advantage using SINOBEAM LS：
(1) it can be used for replacing the lime in traditional liming process, lime can also be coordinated to be used for conventional liming process, reduced
Lime consumption.
(2) energy uniformly penetrating is intracutaneous, fully dispersed collagenous fibres, effective scattered and dissolving interfibrillar substance, and being capable of temperature
The opening neck shin line of sum, side abdomen line, finished leather position difference is small, good hand feeling, uniformity, and cutification is expeled sanction area and significantly increased.
(3) there is very strong scattered and removal ability to scurf and dirt etc. so that grain is clearly smooth.
(4) effect relaxes, it is not easy to produces loose side phenomenon, particularly grain compactibility is good on cow leather upper leather, resistance to fall
Property is good.
(5) dyeing can be substantially reduced and phenomena such as risk of dyeing defect, reduction greyness, oil mark occur.
(6) water consumption that liming is washed with water and deliming process reclaimed water, deliming washing control very well can largely be saved
System, it is cost-effective so as to reduce pollution treatment pressure.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme of the application, letter will be made to the required accompanying drawing used in embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of technological process signal of the key link of the method for leather-making for guarantor's hair depilation that the embodiment of the present application provides
Figure；
Fig. 2 is a kind of flowage structure schematic diagram of the method for leather-making for guarantor's hair depilation that the embodiment of the present application provides.
Embodiment
Accompanying drawing herein is merged in specification and forms the part of this specification, shows the implementation for meeting the application
Example, and be used to together with specification to explain the principle of the application.
, below will be to embodiment or existing in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Embodiment one
The overall process of leather production, the process program and flow mainly included are：Greenhide batching → going end to end → weighs
→ pre- immersion → washing → fleshing → main immersion → washing → fleshing → guarantor's hair depilation → filter hair → liming → fleshing → vexed washing
→ weighing → deliming without ammonium → softening → washing → pickling → few chromium or without tanning → take horse standing → classification → water squeezing stretching, extension →
Cut open layer (head layer and second layer leather (selling)) -- head layer deburring → shaving → weighing → retanning → washing → neutralization → dyeing and fat-liquoring →
Resisdye → washing → take horse → water squeezing stretching, extension → get damp again → shake soft → pressing plate → buffing → wash one's face → buffing → back cover → standing →
Roller coating oil → standing (4 hours) → locating back → hand touch layer → deburring → gage storage.
Wherein, as depicted in figs. 1 and 2, a kind of method for leather-making for protecting hair depilation is present embodiments provided, it is mainly wrapped
Include following steps：
Step 1：Pre- immersion；
Liquor ratio 250%, bactericide 0.1%, SINOBEAM S10 0.3%, soda ash 0.5%, soak 3 hours, it is small to rotate 1
When, pH value 9.0 or so is surveyed, is then rotated 10 minutes per hour, overnight；Next day, turn 30 minutes, discharge opeing, washing once, is returned simultaneously
Receive waste liquid；
Step 2：Fleshing
Step 3：Main immersion
Liquor ratio 250%, 20 DEG C of temperature, bactericide 0.1%, SINOBEAM S10 0.3%, soda ash 0.5%, degreasing agent
0.3%, rotate 2 hours, survey pH value 9.2 or so, then rotate 10 minutes per hour, overnight；Next day, turn 30 minutes, discharge opeing, stay
50% liquor ratio, while Recycling of waste liquid；
Step 4：Depilation, liming
Liquor ratio 50%, add 1%SINOBEAM LS, rotate 30 minutes, generation is protected capillary effect fruit；Add 1.5%SINOBEAM
LM, rotate 60 minutes, hair root loosens；Add akali sulphide 0.8%, rotate 60 minutes, the big portion of hair comes off；Pulverized limestone 1% is added to rotate 30
Minute；Add degreasing agent 0.3%, add 25 DEG C of water 100%, rotate 30 minutes, then add 25 DEG C of water 100%, rotation 60 minutes, then often
Hour turns 5 minutes, overnight；Next day turns 30 minutes, filters hair, discharge opeing, while Recycling of waste liquid；
Step 5：Lime-fleshing, cut open layer.
The present embodiment is intended to research using the new depilation liming auxiliary agent (SINOBEAM LM) of excellent performance and multi-functional swollen
Swollen dose (SINOBEAM LS), both can guarantee that the generation that pollution in leather industry thing is greatly reduced, and can reduce worker labor intensity and
Improve the quality of resultant Leather.Based on in leather production process depilation liming link chemical reaction and pelt quality requirement it is ripe
Know, we have selected the new compound-Hydroxycarbamide of silver Puri spy company, the sulfydryl that existing depilation needs in the compound structure
Group, have again and suppress the organic amine group that graywall excessively expands, also destroy the hydrotropy material that hydrogen bond is formed；And can
To substitute the novel and multifunctional swelling agent LS of lime (production of silver Puri spy Chemical Co., Ltd. provides), the product is a kind of new
The organic chelated alkali of type, it can slowly be hydrolyzed after uniformly penetrating, produce enough hydroxyls, with the progress of hydrolysis, hide fiber
Isoelectric point change, make the slow water-filling even inflation of skin.
One as the present embodiment technical scheme improves greatly, and the SINOBEAM S10 are immersion agent, are non-ionic surfaces
The mixture of activating agent and a variety of hydrophilic compounds, in acid, alkali is stable in salting liquid, biodegradable.With good parent
The water-based and ability of emulsified fat, it is also very strong to remove the ability of spot, also can be fast even if the very high raw material skin of processing fat content
Speed obtains the immersion effect of whole uniformity.Only there is slight foam, soaked available for paddle-tumble.In high concentration electrolyte
Good surface-active can be kept, is very beneficial for the immersion of wet salted hide.
One as the present embodiment technical scheme improves greatly, and Hydroxycarbamide SINOBEAM LM are organic compounds, work therein
Property group-SH (sulfydryl), has good dissolution to hair and scurf；Another active group-NH2 (amido, urea groups, guanidine
Base), it can effectively suppress alkali compounds to oedema caused by the excessive expansion of collagenous fibres, destroy in tropocollagen molecule and divide
Hydrogen bond between son, so that conception and the change of state of aggregation occur for collagen, the structure of collagenous fibres becomes unstable, is it
His infiltration creates conditions to inside materials with hide glue fibril and therewith generation interaction.
One as the present embodiment technical scheme improves greatly, and the SINOBEAM LM used in the step 4 are Hydroxycarbamide
Organic compound, containing active group sulfydryl, the sulfydryl has good dissolution to hair and scurf；Also contain active group
Group's amido, urea groups and guanidine radicals；The amido, urea groups and guanidine radicals effectively suppress excessive expansion of the alkali compounds to collagenous fibres and
Caused oedema, is destroyed in tropocollagen molecule and intermolecular hydrogen bond, so that conception and the change of state of aggregation occur for collagen,
The structure of collagenous fibres becomes unstable, is penetrated into for other materials inside materials with hide glue fibril and interaction occurs therewith and created
Condition.
One as the present embodiment technical scheme improves greatly, ' adds 1%SINOBEAM LS ' repeatedly to add in the step 4
Enter.
One as the present embodiment technical scheme improves greatly, ' adds 1%SINOBEAM LS ' once to add in the step 4
Enter.
One as the present embodiment technical scheme improves greatly, and the step 4 is depilation, liming
Liquor ratio 50%, add 1% lime, rotate 30 minutes, generation is protected capillary effect fruit；1.5%SINOBEAM LM are added, are turned
Dynamic 60 minutes, hair root loosens；Add akali sulphide 0.8%, rotate 60 minutes, the big portion of hair comes off；Pulverized limestone 1% is added to rotate 30 minutes；
Add degreasing agent 0.3%, add 25 DEG C of water 100%, rotate 30 minutes, then add 25 DEG C of water 100%, rotation 60 minutes, then per hour
Turn 5 minutes, overnight；Next day turns 30 minutes, filters hair, discharge opeing, while Recycling of waste liquid.
One as the present embodiment technical scheme improves greatly, and the step 4 is depilation, liming
Liquor ratio 50%, add 1% lime and SINOBEAM LS mixtures, rotate 30 minutes, generation is protected capillary effect fruit；Add
1.5%SINOBEAM LM, rotate 60 minutes, hair root loosens；Add akali sulphide 0.8%, rotate 60 minutes, the big portion of hair comes off；Add stone
Ashes 1% rotates 30 minutes；Add degreasing agent 0.3%, add 25 DEG C of water 100%, rotate 30 minutes, then add 25 DEG C of water 100%, rotate
60 minutes, then turn per hour 5 minutes, overnight；Next day turns 30 minutes, filters hair, discharge opeing, while Recycling of waste liquid.
Specifically, the SINOBEAM LS are different from the liming agent of routine, and such as lime, sulfide and caustic soda, are one
The new organic chelated alkali of kind, can slowly hydrolyze after uniformly penetrating, produce enough hydroxyls, with the progress of hydrolysis, make
The slow water-filling even inflation of skin.Lime is typically to be hydrolyzed in infiltration, and it is excessive that misoperation easily causes superficial expansion, dermatoglyph
Do not open, or be usually a small amount of multiple principle so to control its speed of expansion phenomena such as position difference is especially big.And LS
It can once add completely, it is more preferable to add effect by several times certainly, it is not easy to the superficial expansion excessively unexpanded phenomenon of the skin heart is caused,
More uniform due to acting on, the particularly water-filling positive effect of side belly is better than lime, more conducively split.LS also has bigger with lime
A difference be that different to hide fiber expansion direction with lime, LS swelling fibers are into horizontal and vertical even inflation, and stone
Ash is more likely to longitudinal dilatation, so finally expansion skin shape LS is more upright, also causes neck head line and what side abdomen line was beaten more opens, institute
With yield of leather with regard to big.
Embodiment two
On the basis of embodiment one, the present embodiment mainly describes using in the method for leather-making of above-mentioned guarantor's hair depilation
SINOBEAMLM and SINOBEAM LS analysis of experimental data.
The chemical constitution of the Hydroxycarbamide is：
Wherein R1=H ,-CH3 ,-CH2-CH3；R2=-CH2- ,-CH2-CH2- etc..
Depilation and scattered collagen can be played simultaneously containing-SH and-NH2 active groups simultaneously in this kind of compound molecule
The effect of fiber, this innovative product can make leather making process depilation liming technique simplify and efficiently.
Particularly, the general aspects of the Hydroxycarbamide LM：
(1), outward appearance：Light brown clear liquid, band sulphide smell；
(2), solid content：25%；
(3), pH value：4.5.
1), Hydroxycarbamide depilation
According to the experimental procedure in embodiment one, triethanolamine, TGA and Hydroxycarbamide is selected to compare under certain condition
Right, experiment condition is：Liquor ratio 100%, 25 DEG C of temperature, depilation auxiliary agent 1.0% (being converted into 100% content), lime 3.0%.Such as
Shown in table 1, for the depilation contrast under the alkalescence conditions of Ca (OH) 2, wherein data are examined with leather production process in table
Numeral determined by control method deciding grade and level.
Depilation under table 1 Ca (OH) 2 alkalescence condition
Experiment shows that under the alkalescence conditions of Ca (OH) 2 Hydroxycarbamide has preferable hair removal effect, and its destruction to hair is only
It is a kind of hair remover of function admirable inferior to TGA.
2), investigation of the Hydroxycarbamide to suppression graywall expansion
Three kinds of schemes obtain the Gain weight of graywall, and moisture and thickness are shown in Table 2,
| Blank | Hydroxycarbamide auxiliary agent | Commercially available liming agent | |
| Liming 2.5Hrs | 210 | 201 | 207 |
| Liming 18Hrs | 230 | 207 | 220 |
| Skin increases weight (%) | 22 | 18 | 21 |
| Thickness (mm) at the skin heart | 4.0 | 3.6 | 3.8 |
The graywall of table 2 expands comparative experimental data
As shown in table 2, as shown by data, the expansion of the addition of Hydroxycarbamide environment friendly depilation auxiliary liming agent to skin during liming have
Obvious inhibitory action, and better than commercially available general liming agent, and the graywall handled with it is substantially than blank sample and control sample
Will be soft, incidence ash wrinkle, which shoals, to tail off.
(2) swelling agent SINOBEAMLS general aspects
(1) characteristic：Feature liming agent
(2) outward appearance：Light blue paste
(3) pH value：＞=12.0 (10% aqueous solution)
(4) basicity：＞=18.0
2.1st, SINOBEAM LS performance and purposes
(1) a kind of environment-friendly type cleaning swelling agent, available for the lime replaced in traditional liming process, can also coordinate lime
For conventional liming process, lime consumption is reduced.
(2) energy uniformly penetrating is intracutaneous, fully dispersed collagenous fibres, effective scattered and dissolving interfibrillar substance, and being capable of temperature
The opening neck shin line of sum, side abdomen line, finished leather position difference is small, good hand feeling, uniformity, and cutification is expeled sanction area and significantly increased.
(3) there is very strong scattered and removal ability to scurf and dirt etc. so that grain is clearly smooth.
(4) effect relaxes, it is not easy to produces loose side phenomenon, particularly grain compactibility is good on cow leather upper leather, resistance to fall
Property is good.
(5) dyeing can be substantially reduced and phenomena such as risk of dyeing defect, reduction greyness, oil mark occur.
(6) water consumption that liming is washed with water and deliming process reclaimed water, deliming washing control very well can largely be saved
System, it is cost-effective so as to reduce pollution treatment pressure.
In summary, Hydroxycarbamide LM and swelling agent LS is the compound of new structure, in Ecology Leather environment friendly depilation, liming
In process, using brand-new, superior performance cleans leather agent, is advantageous to process hides depilation liming process, especially suitable for ox
Guarantor's hair depilation of skin skin, few ash expansion.
To fully demonstrate Hydroxycarbamide LM and LS structure and performance characteristics, the present embodiment is to protect hair shaft and reduce high pollution
Chemicals is introduced as technical essential, makes every effort to the high pollution for solving leather production from source.
As shown in Table 3 and Table 4, respectively in the production of cow leather upper leather lime and akali sulphide amount ratio compared with and depilation liming
Waste liquid water-quality ratio compared with；From data in table, Hydroxycarbamide compound L M and the organic chelated alkali of swelling agent LS are used to protect hair liming
In technique, it is possible to reduce 66.6% sulfide dosage in grey alkaline process liming technique, reduce by 74.3% lime consumption, reduce leaching
80% COD discharges during ash, and finished leather still has superperformance.
| Material | (Hydroxycarbamide+LS) method | Traditional bag ash pushes away a mao method | Decrement |
| Akali sulphide | 1.5% | 4.5% | 66.6% |
| Lime | 1.8% | 7.0% | 74.3% |
In the leather production of the cow leather upper of table 3 lime and akali sulphide amount ratio compared with
| Pollutant | Hydroxycarbamide+LS methods | It is conventional to wrap grey method | Decrement |
| COD/mg.L-1(kg.t-1) | 7200(14.4) | 42007(84.0) | 82.6% |
| Ammonia nitrogen/mg.L-1(kg.t-1) | 310(0.62) | 480(0.96) | 35.4% |
| Sulfide/mg.L-1(kg.t-1) | 1796(3.59) | 8132(16.26) | 77.9% |
| Suspension/mg.L-1(kg.t-1) | 6730(13.46) | 39580(79.16) | 83.0% |
| Total solid/mg.L-1(kg.t-1) | 11040(22.08) | 45860(91.72) | 75.9% |
The depilation liming waste liquid water-quality ratio of table 4 compared with
It should be noted that the relational terms of such as " first " and " second " or the like be used merely to an entity or
Operation makes a distinction with another entity or operation, and not necessarily requires or imply these entities or exist between operating any
This actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant be intended to it is non-exclusive
Property includes, so that article or equipment including a series of elements not only include those key elements, but also including not having
The other element being expressly recited, or also include for this process, method, article or the intrinsic key element of equipment.Do not having
There is the key element in the case of more limiting, limited by sentence "including a ...", it is not excluded that including the mistake of the key element
Other identical element in journey, method, article or equipment also be present.
Described above is only the embodiment of the application, is made skilled artisans appreciate that or realizing this Shen
Please.A variety of modifications to these embodiments will be apparent to one skilled in the art, as defined herein
General Principle can be realized in other embodiments in the case where not departing from spirit herein or scope.Therefore, the application
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
It should be appreciated that the content that the application is not limited to be described above and is shown in the drawings, and can
To carry out various modifications and changes without departing from the scope.Scope of the present application is only limited by appended claim.
Claims (8)
1. a kind of method for leather-making for protecting hair depilation, it is characterised in that it is mainly included the following steps that：
Step 1：Pre- immersion；Wherein liquor ratio 250%, bactericide 0.1%, SINOBEAM S10 0.3%, soda ash 0.5%, immersion
3 hours, rotate 1 hour, survey pH value 9.0 or so, then rotate 10 minutes per hour, overnight；Next day, turn 30 minutes, discharge opeing, water
Wash once, while Recycling of waste liquid；
Step 2：Fleshing；
Step 3：Main immersion；Wherein liquor ratio 250%, 20 DEG C of temperature, bactericide 0.1%, SINOBEAM S10 0.3%, soda ash
0.5%, degreasing agent 0.3%, rotate 2 hours, survey pH value 9.2 or so, then rotate 10 minutes per hour, overnight；Next day, turn 30
Minute, discharge opeing, stay 50% liquor ratio, while Recycling of waste liquid；
Step 4：Depilation, liming；Wherein liquor ratio 50%, add 1%SINOBEAM LS, rotate 30 minutes, generation is protected capillary effect fruit；
1.5%SINOBEAM LM are added, are rotated 60 minutes, hair root loosens；Add akali sulphide 0.8%, rotate 60 minutes, the big portion of hair comes off；
Pulverized limestone 1% is added to rotate 30 minutes；Add degreasing agent 0.3%, add 25 DEG C of water 100%, rotate 30 minutes, then add 25 DEG C of water 100%,
Rotate 60 minutes, then turn per hour 5 minutes, overnight；Next day turns 30 minutes, filters hair, discharge opeing, while Recycling of waste liquid；
Step 5：Lime-fleshing, cut open layer.
2. a kind of method for leather-making for protecting hair depilation according to claim 1, it is characterised in that the step 1 and step 3
The middle SINOBEAM S10 used are immersion agent；It is the mixture of nonionic surfactant and a variety of hydrophilic compounds.
3. a kind of method for leather-making for protecting hair depilation according to claim 1, it is characterised in that used in the step 4
SINOBEAM LS are organic chelated alkali, are slowly hydrolyzed after the SINOBEAM LS uniformly penetratings, produce enough hydroxyls, with
The progress of hydrolysis, the isoelectric point of hide fiber changes, and makes the slow water-filling even inflation of skin.
4. a kind of method for leather-making for protecting hair depilation according to claim 1, it is characterised in that used in the step 4
SINOBEAM LM are Hydroxycarbamide organic compound, and containing active group sulfydryl, the sulfydryl has molten well to hair and scurf
Solution acts on；Also contain active group amido, urea groups and guanidine radicals；The amido, urea groups and guanidine radicals effectively suppress alkali compounds pair
Oedema caused by the excessive expansion of collagenous fibres, is destroyed in tropocollagen molecule and intermolecular hydrogen bond, so that collagen is sent out
Raw conception and the change of state of aggregation, the structure of collagenous fibres become unstable, are penetrated into for other materials inside materials with hide glue fibril
And interaction occurs therewith and creates conditions.
5. a kind of method for leather-making for protecting hair depilation according to claim 1, it is characterised in that ' add 1% in the step 4
SINOBEAM LS ' are repeatedly addition.
6. a kind of method for leather-making for protecting hair depilation according to claim 1, it is characterised in that ' add 1% in the step 4
SINOBEAM LS ' are once to add.
7. it is according to claim 1 it is a kind of protect hair depilation method for leather-making, it is characterised in that the step 4 for depilation,
Liming；Wherein liquor ratio 50%, add 1% lime, rotate 30 minutes, generation is protected capillary effect fruit；1.5%SINOBEAM LM are added, are turned
Dynamic 60 minutes, hair root loosens；Add akali sulphide 0.8%, rotate 60 minutes, the big portion of hair comes off；Pulverized limestone 1% is added to rotate 30 minutes；
Add degreasing agent 0.3%, add 25 DEG C of water 100%, rotate 30 minutes, then add 25 DEG C of water 100%, rotation 60 minutes, then per hour
Turn 5 minutes, overnight；Next day turns 30 minutes, filters hair, discharge opeing, while Recycling of waste liquid.
8. it is according to claim 1 it is a kind of protect hair depilation method for leather-making, it is characterised in that the step 4 for depilation,
Liming；Wherein liquor ratio 50%, add 1% lime and SINOBEAM LS mixtures, rotate 30 minutes, generation is protected capillary effect fruit；Add
1.5%SINOBEAM LM, rotate 60 minutes, hair root loosens；Add akali sulphide 0.8%, rotate 60 minutes, the big portion of hair comes off；Add stone
Ashes 1% rotates 30 minutes；Add degreasing agent 0.3%, add 25 DEG C of water 100%, rotate 30 minutes, then add 25 DEG C of water 100%, rotate
60 minutes, then turn per hour 5 minutes, overnight；Next day turns 30 minutes, filters hair, discharge opeing, while Recycling of waste liquid.
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| CN114807460A (en) * | 2022-04-26 | 2022-07-29 | 广河县国富皮革有限公司 | Hair-saving unhairing leather-making process method |
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