CN1492056A - Process for producing pigskin garment leather - Google Patents
Process for producing pigskin garment leather Download PDFInfo
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Abstract
The present invention relates to production process of pigskin garment leather. Raw pigskin is produced into facial garment leather through the steps of mechanical elimination of meat, defatting, coating enzyme, pulling hair, coating ash, eliminating ash, softening, soaking in acid, tanning, dissection, cutting to even, re-tanning, dyeing, drying, softening and painting; and the second and third layer of leather is produced into suede garment leather through rubbing, re-tanning, dyeing, drying, softening and brushing. The present invention features the tanning liquid amount of 0.5-1 time of leather, tanning temperature of 36-37 deg.c, tanning time of 8-12 hr, tanning liquid with RE salt of 0.4 % and chrome tannage of 6 %, and the recovering of waste tanning liquid. The present invention can obtain soft, plumpy, elastic, fine leather product in the style of sheep leather, and the production process has less effluent and less environmental pollution.
Description
The invention belongs to the process hides field, especially relate to a kind of process for producing pigskin garment leather.
Finished product that existing pigskin leather making technology obtains leather plate is hard, and feel is poor, and the position difference is big, and it is bigger that its performance and sheepskin are compared gap, and comprehensive benefit is lower.And, producing a large amount of waste water in the leather-making technology, the pH value of these waste water is 8～10, suspended substance is 3000mg/l, Cr
3+Content 60～100mg/l, COD
CrBe 2000～3000mg/l, S
2-(iodimetry,iodometry) content is 100～200mg/l, BOD
5Be 2200mg/l, Cl
-Be 3000mg/l, serious pollution has been caused in rivers, the farmland of China.Simultaneously, one ton of rawhide of the every processing of tanning production also will produce 300～500 kilograms of mud and a large amount of obnoxious flavoures, and the raw material skin is also only had an appointment and 50% become the finished product, and other has 50% to become the contaminative waste.
The object of the present invention is to provide a kind of process for producing pigskin garment leather, the finished product leather that obtains is soft, plentiful, good springiness, grain is careful, and position difference is little, has multiplely in the sense style, and positive (head layer) reaches the style characteristic of glace kid leather, and discharging of waste liquid is few in the production, reduces the pollution to environment.
The objective of the invention is to realize by following technical proposals:
Process for producing pigskin garment leather of the present invention is made up of following operation:
The primitive pigskin group is criticized, mechanical fleshing, degreasing, bag enzyme, pull off the feather of, ruin hair, multiple ash, deliming, softening, pickling, tanning, leave standstill, cut open layer, shaving, obverse leather through retanning, dyeing, drying, whole soft, covering with paint, check, classification gage, put in storage garment grain leather, two layers and third layer leather through buffing, retanning, dyeing, drying, whole soft, brushing, check, classification gage, put in storage suede garment leather; Wherein, in the tanning operation, the tanning liquors ratio is 0.5～1, and temperature is 36～37 ℃, time is 8～12 hours, adds rare earth special salt 0.4%, chrome tanning agent 6% in the tanning liquors, and the tanning waste liquid reclaims and filters, the skin slag that leaches is recycled, and filtrate added in the tanning liquors in the tanning later stage, recycle; Other operations are technology routinely.
In the retanning operation of such scheme, liquor ratio is 2, and 35～38 ℃ of temperature add glutaraldehyde 1%, retanning agent CAR or retanning agent HR4%, retanning agent KRI-A 0～1%, carry out retanning, 4 hours time.
In the pickling procedure of such scheme, the tanning waste liquid reclaim is filtered, filtrate is as the pickling liquid in the pickling procedure, and liquor ratio 0.8, temperature are room temperature～30 ℃, add NaCl 8%, formic acid 0.5%, 66Be H in the pickling liquid
2SO
41.1～1.2%, rotary drum rotation time 2.5～3 hours, time of repose 12～15 hours, after the pickling waste liquid reclaimed, NaCl, Cr in the clear liquid surveyed in sedimentation
2O
3Content is added the NaCl and the tanning agent of respective amount according to processing requirement, adds in the pickling liquid recycle.
In the degreasing process of such scheme, liquor ratio 0.3～0.4,35～36 ℃ of temperature add soda ash 2.5%, grease-removing agent 1%, 2～2.5 hours time in the degreasing fluid.
In the bag enzyme operation of such scheme, 1398 proteinase-10 .2～0.4%, industrial trypsinase 0.05～0.1%, wheat bran 0.5～1%, 25～28 ℃ of temperature, 36～40 hours time.
Ruining in mao operation of such scheme, liquor ratio 0.3～1.3 is ruined and is added NaHS1.5%, Na in mao body lotion
2S 0.5%, lime powder 5%, auxiliary liming agent 1%, temperature are room temperature, rotary drum rotation time 2.5～3 hours, and time of repose 15～17 hours is ruined mao waste liquid and is reclaimed recycle 10～30 times.
In the multiple ash process of such scheme, adopt the multiple ash in pond, liquor ratio 2, temperature is a room temperature, adds lime powder 5%, auxiliary liming agent 1%, 18～20 hours time in the multiple lixivium, only go out not discharge opeing of skin, multiple lixivium continues to use after replenishing 1% lime powder, 0.3% auxiliary liming agent and clear water.
In the such scheme, the liquor ratio of degreasing process is 0.3～0.4, and temperature is 35～36 ℃, adds soda ash 2.5%, grease-removing agent 1%, 2～2.5 hours time in the degreasing fluid; In the bag enzyme operation, 1398 proteinase-10 .2～0.4%, industrial trypsinase 0.05～0.1%, wheat bran 0.5～1%, 25～28 ℃ of temperature, 36～40 hours time; Ruin in mao operation, liquor ratio 0.3～1.3 is ruined adding NaHS 1.5%, Na in mao body lotion
2S 0.5%, lime powder 5%, auxiliary liming agent 1%, temperature are room temperature, rotary drum rotation time 2.5～3 hours, and time of repose 15～17 hours is ruined mao waste liquid and is reclaimed recycle 10～30 times; In the multiple ash process, adopt the multiple ash in pond, liquor ratio 2, temperature are room temperature, add lime powder 5%, auxiliary liming agent 1% in the multiple lixivium, 18～20 hours time, only go out not discharge opeing of skin, and multiple lixivium continues to use after replenishing 1% lime powder, 0.3% auxiliary liming agent and clear water; In the pickling procedure, the tanning waste liquid reclaim is filtered, filtrate is as the pickling liquid in the pickling procedure, and liquor ratio 0.8, temperature are room temperature～30 ℃, add NaCl 8%, formic acid 0.5%, 66Be H in the pickling liquid
2SO
41.1～1.2%, rotary drum rotation time 2.5～3 hours, time of repose 12～15 hours, after the pickling waste liquid reclaimed, NaCl, Cr in the clear liquid surveyed in sedimentation
2O
3Content is added the NaCl and the tanning agent of respective amount according to processing requirement, adds in the pickling liquid recycle; In the tanning operation, the tanning liquors ratio is 0.5～1, and temperature is 36～37 ℃, time is 8～12 hours, adds rare earth special salt 0.4%, chrome tanning agent 6% in the tanning liquors, and the tanning waste liquid reclaims and filters, the skin slag that leaches is recycled, and filtrate added in the tanning liquors in the tanning later stage, recycle; In the retanning operation, liquor ratio is 2, and 35～38 ℃ of temperature add glutaraldehyde 1%, retanning agent CAR or retanning agent HR4%, retanning agent KRI-A 0～1%, carry out retanning, 4 hours time; Other operations are technology routinely.
In the such scheme, the waste liquid of each operation discharging enters the comprehensive wastewater pond, qualified discharge behind preliminary sedimentation tank, grid, equalizing tank, aeration tank, air supporting machine, oxidation ditch, second pond, artificial swamp successively, sediment in preliminary sedimentation tank, equalizing tank, aeration tank, the second pond send pressure filter behind concentration basin, the peat cake that leaches is disposed filtrate separately and returned equalizing tank.
Process for producing pigskin garment leather of the present invention has the following advantages:
1. ruin the limited circulation of mao liquid, multiple lixivium recycles technical feasibility, control is convenient, can satisfy the different process requirement, and is also helpful to improving the quality;
2. utilization rare earth chromium combination tanned leather method has overcome chroming waste liquor and has directly recycled the problem that reduces leather quality, the tanning waste liquid is directly used continuously become a reality, and form the industrial technology of complete supporting practicality;
3. the usage quantity and the quantity discharged that ruin hair, answer ash, the recycle of tanning waste liquid have reduced nuisance significantly, make nuisance chromic salts quantity discharged reduce 90%, the sulfide emission amount reduces 60%, and the lime quantity discharged reduces 80%, the Industrial Salt quantity discharged reduces 90%, and saves chemical materials;
4. comprehensive wastewater is administered gross investment minimizing 50% to 60%, and working cost reduces by 30%～40%.
In the tanning operation, handle pelt with chromic salt, be to make skin become the qualitative change process of leather, this process chromic salts consumption is big, and global tanning chemistry man and technologists are striving to find substitute chromium or are fully phasing out the tanning technology of chromium.Its reason one is that the reserves of chromium are little in the earth's crust, shortage; The 2nd, trivalent chromium is harmful.Contain Cr in the common tanning waste liquid
2O
33～8 grams per liters, Industrial Salt 100～200 grams per liters.The tanning waste liquid is the second largest source of pollution of process hides.In all process hides wastewater treatments at present all is to reclaim respectively, and separation enters the comprehensive wastewater treating pond after handling again, this method investment is big, and technology is loaded down with trivial details, and is wayward, the working cost height, the chromic salts that is reclaimed is not handy, and can't solve neutral salt in the waste liquid (NaCl, Na
2SO
4) pollution.
The present invention adopts the tanning of rare earth chromium combination tannage, has improved the tanning performance of chromic salts on the one hand, has reduced the chromic salts usage quantity, has improved the quality and the yield of leather of finished leather; The tanning waste liquid is recycled, tanning liquors is all reclaimed, as pickling and tanning.
The present inventor studies show that: before recycling, by the useless chrome liquor of suitable adjusting, make the macromolecule complex in the owse change little title complex negative or neutral, low electric charge next time, can solve the problem of blue grain chap well.The particularly adding of rare earth auxiliary tanning agent can promote the chromic compound component to increase, and is evenly distributed, and helps the uniformly penetrating and the absorption of chromium, thereby saves the chrome tanning agent consumption.And blue leather to have a rare earth hides-tanning grain careful, the characteristics that color is light.Along with increasing of tanning waste liquid cycle index, the chromium content distribution of each layer (cut open from the flesh noodles to the grain is 7 layers) is more even in the blue leather.Only with the leather of 1 (not circulating) tanning, the distribution of chromium in leather is very inhomogeneous, and the leather flexibility of tanning is also inhomogeneous; Circulate after 5 times, chromium is more even in each layer of section distribution of indigo plant leather, and the flexibility inside and outside of finished leather is more even.Compare with circulation technology not, total chrome content slightly reduces (reducing 2.37%), does not show that the crosslinked action of chromium in skin do not reduce but the shrinkage temperature of leather reduces (＞100 ℃).
The present inventor recycles the tanning waste liquid, and constant product quality, Technology are rationally feasible, and it is convenient to detect, control, and the wet blue leather quality results sees Table one before and after recycling, and materials consumption the results are shown in Table two.As seen, the present invention reduces the salt consumption more than 60% from table two, reduces chromic salts consumption 28%, and every skin reduces cost nearly 1 yuan, economic benefit and obvious environment benefit.
Table one rare earth-chromium is blue wet in conjunction with waste liquid recycle and straight chrome tanning and the rare earth-chrome tanning system of tanning
The contrast of keratin amount
Method wet blue leather quality
Straight chrome tanning leather blue-greenish colour, grain is thicker, soft and full good springiness, shrinkage temperature height
Rare earth-chrome tanned leather look light, and grain is flat thin, and soft and full property is good, shrinkage temperature＞100 ℃
Waste liquid recycle look light, and grain is flat thin, and soft and full property is good, and the limit the part between the ribs and the hips is populated, portion
Potential difference is little, shrinkage temperature＞100 ℃
Table two rare earth-chromium is in conjunction with tanning waste liquid recycle materials consumption (in 100 tons of rawhides)
Process for tanning NaCl consumption chromic salts consumption discharging of waste liquid amount economize on the use of funds (unit)
Ton minimizing (%) ton minimizing (%) ton reduces (%) and adds up to individual
Tradition chrome tanning 8.0 9.8 140
Rare earth-chrome tanned leather 8.0 8.4 14.3 120 14 7,700 0.385
Waste liquid circulation 2～3.2 75～60 7.18 28.77 20 85.7 19,619 0.981
Utilize
Illustrate: with 850 yuan/ton of NaCl, 5500 yuan of/ton meters of chromic salts.
Make the pigskin garment grain leather reach the style characteristic of sheepskin, it is not enough only depending on aforesaid treatment measures.Composite tan fatting agent also is vital.Handle by retanning, stuffing, it is poor further to reduce the crust leather position, the fullness and the elasticity of increase crust leather.Prevent that loose fibres bonds in drying process, make the crust leather hardening.Facts have proved, make pig leather have the style of lamb skin, must adopt dissimilar retanning agent and fatting agent, be equipped with corresponding treatment process.
KRI-A is many metals of Cr-Zr-Al tanning agent, is cationic, and not only molecule is big for it, selects performance good, and with the tanning performance of Cr, Zr salt, with the acrylic polymer tanning agent of anionic good compatibleness is arranged.The latter has further improved the fullness and the elasticity of crust leather, and the position that has dwindled the leather base is poor, makes more uniformity of whole thickness degree of leather base, soft and full degree.
Process for producing pigskin garment leather of the present invention adopts degreasing suitcase enzymatic process, and not only positive (head layer) keratin amount reaches the lamb skin style, and two, third layer leather also can be processed into high-grade suede garment leather, its price is 3～4 times of high-grade shoe lining leather.And alkali suitcase enzyme, bag ash not only positive (head layer) quality be not as good as lamb skin, two, third layer leather can only process low-grade velour (now at a discount) or shoe lining leather.The former comprehensive benefit far exceeds the latter.
Skin after the degreasing reclaims (every micromicro reclaims 0.70 yuan of fund) through the epilation operation with 80% hair and has so promptly made full use of resource, cuts the waste, and greatly reduces again because of ruining a mao required sulfide, has reduced Na effectively
2The consumption of S has reduced because of hair and has damaged remaining S in the sludge quantity produce, the waste water
2-The chemical oxygen demand of content and waste water has been created condition for the recycle of depilation liming liquid, has also alleviated comprehensive wastewater and has administered burden.
Ruining a mao operation is that leather is produced one of requisite operation, rawhide must be handled through ruining mao liming, remove the fine hair in the peeling, little Mao, upper layer, collagenous fiber bundle water-filling under the highly basic effect is expanded, dissociate into soluble protein, make loose the opening of the thick closely fibrous bundle of establishment, then be separated into more tiny fiber, make leather have porousness, soft and full, grain is flat thin.If liming is dealt with improperly, collegen filament disperse bad, and finished leather is hard, flat thin of poor quality with regard to plate.This operation is to make one of very important operation of high-grade soft leather.
Ruining mao material of liming use at present is to have sodium sulphite, Sodium sulfhydrate and the lime of ruining hair effect and expansion, and triplicity is used and can be obtained the effect of satisfaction.70% pollution of leather-making waste water comes self-destruction hair waste liquid.Traditional processing technology is to use once just discharging, and 1 ton of rawhide of every processing will discharge 1.5～2.5 cubic metres of waste water, and every day will be discharged 30～35 cubic metres of waste liquids by the tannery of year 1000000 pigskins of processing, and environment is caused serious pollution.
The present inventor studies through test of many times, changes traditional epilation into little body lotion high density and ruins a mao liming, and will ruin mao waste liquid and reclaim recycle.Effect is shown in table three～table five.
The little body lotion of table three is ruined mao liming and recycle and traditional epilation resultant leather quality relatively
Ruin cant method water consumption sulfide consumption depilation liming effect and resultant leather quality
(％) (％)
Tradition method 150～200 3.5～4.0 depilations are good, and non-homogeneous expansion is even, loose side.Become
Leather position difference is big, and two, the third layer leather base can not do
Suede garment leather.
Little body lotion method 30～130 1.8～2.0 depilations are good, and the appropriateness that expands becomes grain thin
Cause, soft, plentiful, good springiness, two, three
Layer velour fine hair is careful, good hand touch.
Little body lotion circulates 30 1.6 depilations well, the appropriateness that expands, and resultant leather quality is together
Utilize little body lotion method
The little body lotion of table four is ruined mao economical effectiveness of liming recycle (in per 100 tons of rawhides)
A water-saving amount joint sulfide joint waste liquid subtracts m
3Lime subtracts a joint Zhi Heji joint Zhi Yuan/skin
Reduction is a small amount of
90% 10 30% 600 yuan 6400 yuan 0.32 in 80-85%12 unit 54% 5700 yuan
Illustrate: with 0.1 yuan in water per ton, 3000 yuan per ton of NaHS, lime 400 yuan of meters per ton.
Mao liming recycle ruined by the little body lotion of table five and traditional law system finished leather physicals compares
Method tensile strength (N/mm) elongation (5N/mm) tear strength (N/mm)
Recycle 7.5～10 27～35 22～45
Tradition method 7.0～9.0 25～35 23～38
Result of study shows, it is the same with the result who uses on ox-hide to resultant leather quality to adopt little body lotion to ruin mao liming recycle, because when adopting little liquor ratio depilation, the concentration of sulfide and alkali is higher in the body lotion, ruins the capillary effect fruit better.The concentration height, osmotic pressure is big.S
2-, OH
-Easily penetrate intracutaneous portion, and speed is fast, evenly, " lack of water " in addition, rawhide can not expand, and more helps sulfide, alkali and infiltrates intracutaneous portion and have an effect and disperse, also clear away the obstacles in the position that infiltrates through tissue tight for sulfide and alkali.By the further dissemination of alkali to collagenous fiber bundle, solve pigskin leather making preferably and be difficult to the position difference problem that overcomes for a long time, laid good basis for making sheep style type pig leather.The result of table four shows direct economic benefit and the indirect economic effect that the depilation waste liquor recycle is brought, and has both alleviated the pollution treatment burden, has brought significant joint to prop up again simultaneously, and production cost is further reduced.To the enterprise that a year processes 1,000,000 pigskins, only ruin one of mao liquid recycle can increase income 30 in 1 year surplus ten thousand yuan.
Ruin the macromolecular colloid material of soluble protein and calcium formation in amino acid, protein and the skin after containing hairiness in mao liming liquid and damaging, increase along with cycle index, these product accumulation are more, make waste liquid dense thick, the rawhide expansion is reduced, influence the quality of finished leather, only can limitedly circulate.At present, 10～20 times capable of circulation of summer, 15～30 times capable of circulation of winter.The annual waste liquid that can discharge less more than 70%.
In the multiple ash process, the purpose of multiple ash be make collegen filament further relax, loose equably, make finished leather obtain soft preferably, fullness.At present, tannery mostly adopts the multiple ash of rotary drum, and multiple lixivium uses and once just emits, and both utilization ratio is low like this, and is very uneconomical again, and sewage, sludge discharge are big, seriously polluted, are difficult to administer.
The present inventor will answer lixivium and recycle, and discharging of waste liquid amount, chemical materials consumption are significantly reduced, and finished product keratin amount improves, and is respond well.The result as shown in Table 6.
The multiple lixivium recycle of table six is compared with conventional multiple grey method
Method water loss lime consumption discharging of waste liquid amount resultant leather quality
Ton % ton % m
3%
The flat fine and soft soft fullness of conventional method 200/5/200/grain is good
Recycle 40-80 1-80 40-80 grain is put down fine and soft soft plentiful, good springiness
The result of table six shows: multiple lixivium recycle does not influence resultant leather quality, reduces sludge discharge again in a large number, and the difficulty of the biochemical treatment of comprehensive wastewater is alleviated greatly.
Aforementioned technology is with the three major source of pollution in the tanning production---depilation, multiple ash, the recycle of tanning waste liquid, contained pollution level to greatest extent, but the waste liquid of washing processing such as skin, wash leather, retanning, dyeing and fat-liquoring still has pollution to a certain degree, still needs to handle really to eliminate pollution in leather industry.
Because three kinds of pollutant source emission of the present invention reduce 90% than traditional technology, and basically eliminate the pollution of chromium and neutral salt, make the comprehensive wastewater treatment capacity reduce 20%, handle load (in COD) and reduce 80%.This just makes comprehensive wastewater administer 4500～5500 yuan/ton waste water of fixed investment by routine, be reduced to 1100～1600 yuan of/ton waste water, and working cost drops to 1 yuan of/ton waste water.
In sum, process for producing pigskin garment leather of the present invention, the finished product that obtains leather is soft, plentiful, good springiness, grain is careful, and the position difference is little, has multiple feel style, positive (head layer) reaches the style characteristic of glace kid leather, and discharging of waste liquid is few in the production, has reduced the pollution to environment.
Be embodiments of the invention below.
Embodiment one
The pigskin double centner, through the raw hide group criticize, mechanical fleshing, degreasing, bag enzyme, pull off the feather of, ruin hair, multiple ash, deliming, softening, pickling, tanning, leave standstill, cut open layer, shaving, obverse leather through retanning, dyeing, drying, whole soft, covering with paint, check, classification gage, put in storage garment grain leather, two layers and third layer leather through buffing, retanning, dyeing, drying, whole soft, brushing, check, classification gage, put in storage suede garment leather; Wherein, in the tanning operation, tanning liquors is 80 kilograms, temperature is 36～37 ℃, and the time is 10 hours, adds 0.32 kilogram of rare earth special salt, 4.8 kilograms of chrome tanning agents in the tanning liquors, the tanning waste liquid reclaims and filters, the skin slag that leaches is recycled, and filtrate added in the tanning liquors in the tanning later stage, recycle; Other operations are technology routinely.
Embodiment two
The pigskin double centner, through the raw hide group criticize, mechanical fleshing, degreasing, bag enzyme, pull off the feather of, ruin hair, multiple ash, deliming, softening, pickling, tanning, leave standstill, cut open layer, shaving, obverse leather through retanning, dyeing, drying, whole soft, covering with paint, check, classification gage, put in storage garment grain leather, two layers and third layer leather through buffing, retanning, dyeing, drying, whole soft, brushing, check, classification gage, put in storage suede garment leather; Wherein, in the tanning operation, tanning liquors is 70 kilograms, temperature is 36～37 ℃, and the time is 10 hours, adds 0.28 kilogram of rare earth special salt, 4.2 kilograms of chrome tanning agents in the tanning liquors, the tanning waste liquid reclaims and filters, the skin slag that leaches is recycled, and filtrate added in the tanning liquors in the tanning later stage, recycle; In the retanning operation, retanning liquid is 200 kilograms, and 35～38 ℃ of temperature add 2 kilograms of glutaraldehyde, 8 kilograms of retanning agent CAR, 4 hours time in the retanning liquid; Other operations are technology routinely.
The waste liquid of each operation discharging enters the comprehensive wastewater pond, qualified discharge behind preliminary sedimentation tank, grid, equalizing tank, aeration tank, air supporting machine, oxidation ditch, second pond, artificial swamp successively, sediment in preliminary sedimentation tank, equalizing tank, aeration tank, the second pond send pressure filter behind concentration basin, the peat cake that leaches is disposed filtrate separately and returned equalizing tank.
Embodiment three
The pigskin double centner, through the raw hide group criticize, mechanical fleshing, degreasing, bag enzyme, pull off the feather of, ruin hair, multiple ash, deliming, softening, pickling, tanning, leave standstill, cut open layer, shaving, obverse leather through retanning, dyeing, drying, whole soft, covering with paint, check, classification gage, put in storage garment grain leather, two layers and third layer leather through buffing, retanning, dyeing, drying, whole soft, brushing, check, classification gage, put in storage suede garment leather; Wherein, in the pickling procedure, the tanning waste liquid is reclaimed filtration, get 80 kilograms of filtrates as the pickling liquid in the pickling procedure, temperature is a room temperature, adds 6.4 kilograms of NaCl, 0.4 kilogram in formic acid, 66Be H in the pickling liquid
2SO
40.88 kilogram, rotary drum rotation time 2.5 hours, time of repose 12 hours, after the pickling waste liquid reclaimed, NaCl, Cr in the clear liquid surveyed in sedimentation
2O
3Content is added the NaCl and the tanning agent of respective amount according to processing requirement, adds in the pickling liquid recycle; In the tanning operation, tanning liquors is 50 kilograms, and temperature is 36～37 ℃, time is 12 hours, adds 0.2 kilogram of rare earth special salt, 3 kilograms of chrome tanning agents in the tanning liquors, and the tanning waste liquid reclaims and filters, the skin slag that leaches is recycled, and filtrate added in the tanning liquors in the tanning later stage, recycle; In the retanning operation, retanning liquid is 200 kilograms, and 35～38 ℃ of temperature add 2 kilograms of glutaraldehyde, 8 kilograms of retanning agent HR, 4 hours time in the retanning liquid; Other operations are technology routinely.
The waste liquid of each operation discharging enters the comprehensive wastewater pond, qualified discharge behind preliminary sedimentation tank, grid, equalizing tank, aeration tank, air supporting machine, oxidation ditch, second pond, artificial swamp successively, sediment in preliminary sedimentation tank, equalizing tank, aeration tank, the second pond send pressure filter behind concentration basin, the peat cake that leaches is disposed filtrate separately and returned equalizing tank.
Embodiment four
The pigskin double centner, through the raw hide group criticize, mechanical fleshing, degreasing, bag enzyme, pull off the feather of, ruin hair, multiple ash, deliming, softening, pickling, tanning, leave standstill, cut open layer, shaving, obverse leather through retanning, dyeing, drying, whole soft, covering with paint, check, classification gage, put in storage garment grain leather, two layers and third layer leather through buffing, retanning, dyeing, drying, whole soft, brushing, check, classification gage, put in storage suede garment leather; Wherein, in the degreasing process, degreasing fluid is 30 kilograms, and 35～36 ℃ of temperature add 0.75 kilogram of soda ash, 0.3 kilogram of grease-removing agent, 2 hours time in the degreasing fluid; In the pickling procedure, the tanning waste liquid is reclaimed filtration, get 80 kilograms of filtrates as the pickling liquid in the pickling procedure, temperature is 30 ℃, adds 6.4 kilograms of NaCl, 0.4 kilogram in formic acid, 66Be H in the pickling liquid
2SO
40.96 kilogram, rotary drum rotation time 2.5 hours, time of repose 15 hours, after the pickling waste liquid reclaimed, NaCl, Cr in the clear liquid surveyed in sedimentation
2O
3Content is added the NaCl and the tanning agent of respective amount according to processing requirement, adds in the pickling liquid recycle; In the tanning operation, tanning liquors is 60 kilograms, and temperature is 36～37 ℃, time is 12 hours, adds 0.24 kilogram of rare earth special salt, 3.6 kilograms of chrome tanning agents in the tanning liquors, and the tanning waste liquid reclaims and filters, the skin slag that leaches is recycled, and filtrate added in the tanning liquors in the tanning later stage, recycle; In the retanning operation, retanning liquid is 200 kilograms, and 35～38 ℃ of temperature add 2 kilograms of glutaraldehyde, 8 kilograms of retanning agent HR, 1 kilogram of retanning agent KRI-A, 4 hours time in the retanning liquid; Other operations are technology routinely.
The waste liquid of each operation discharging enters the comprehensive wastewater pond, qualified discharge behind preliminary sedimentation tank, grid, equalizing tank, aeration tank, air supporting machine, oxidation ditch, second pond, artificial swamp successively, sediment in preliminary sedimentation tank, equalizing tank, aeration tank, the second pond send pressure filter behind concentration basin, the peat cake that leaches is disposed filtrate separately and returned equalizing tank.
Embodiment five
The pigskin double centner, through the raw hide group criticize, mechanical fleshing, degreasing, bag enzyme, pull off the feather of, ruin hair, multiple ash, deliming, softening, pickling, tanning, leave standstill, cut open layer, shaving, obverse leather through retanning, dyeing, drying, whole soft, covering with paint, check, classification gage, put in storage garment grain leather, two layers and third layer leather through buffing, retanning, dyeing, drying, whole soft, brushing, check, classification gage, put in storage suede garment leather; Wherein, in the degreasing process, degreasing fluid is 30 kilograms, and 35～36 ℃ of temperature add 0.75 kilogram of soda ash, 0.3 kilogram of grease-removing agent, 2.5 hours time in the degreasing fluid; In the bag enzyme operation, 1398 proteinase-10 .3 kilograms, 0.05 kilogram in industrial trypsinase, 1 kilogram in wheat bran, 25～28 ℃ of temperature, 36 hours time; In the pickling procedure, the tanning waste liquid is reclaimed filtration, get 80 kilograms of filtrates as the pickling liquid in the pickling procedure, temperature is a room temperature, adds 6.4 kilograms of NaCl, 0.4 kilogram in formic acid, 66Be H in the pickling liquid
2SO
40.88 kilogram, rotary drum rotation time 2.5 hours, time of repose 12 hours, after the pickling waste liquid reclaimed, NaCl, Cr in the clear liquid surveyed in sedimentation
2O
3Content is added the NaCl and the tanning agent of respective amount according to processing requirement, adds in the pickling liquid recycle; In the tanning operation, tanning liquors is a double centner, and temperature is 36～37 ℃, time is 8 hours, adds 0.4 kilogram of rare earth special salt, 6 kilograms of chrome tanning agents in the tanning liquors, and the tanning waste liquid reclaims and filters, the skin slag that leaches is recycled, and filtrate added in the tanning liquors in the tanning later stage, recycle; In the retanning operation, retanning liquid is 200 kilograms, and 35～38 ℃ of temperature add 2 kilograms of glutaraldehyde, 8 kilograms of retanning agent CAR, 1 kilogram of retanning agent KRI-A, 4 hours time in the retanning liquid; Other operations are technology routinely.
The waste liquid of each operation discharging enters the comprehensive wastewater pond, qualified discharge behind preliminary sedimentation tank, grid, equalizing tank, aeration tank, air supporting machine, oxidation ditch, second pond, artificial swamp successively, sediment in preliminary sedimentation tank, equalizing tank, aeration tank, the second pond send pressure filter behind concentration basin, the peat cake that leaches is disposed filtrate separately and returned equalizing tank.
Embodiment six
The pigskin double centner, through the raw hide group criticize, mechanical fleshing, degreasing, bag enzyme, pull off the feather of, ruin hair, multiple ash, deliming, softening, pickling, tanning, leave standstill, cut open layer, shaving, obverse leather through retanning, dyeing, drying, whole soft, covering with paint, check, classification gage, put in storage garment grain leather, two layers and third layer leather through buffing, retanning, dyeing, drying, whole soft, brushing, check, classification gage, put in storage suede garment leather; Wherein, in the degreasing process, degreasing fluid is 40 kilograms, and 35～36 ℃ of temperature add 1 kilogram of soda ash, 0.4 kilogram of grease-removing agent, 2 hours time in the degreasing fluid; In the bag enzyme operation, 1398 proteinase-10 .2 kilograms, 0.05 kilogram in industrial trypsinase, 1 kilogram in wheat bran, 25～28 ℃ of temperature, 36 hours time; Ruin in mao operation, ruin a mao body lotion double centner, ruin adding 1.5 kilograms of NaHS, Na in mao body lotion
20.5 kilogram of S, 5 kilograms of lime powders, 1 kilogram of auxiliary liming agent, temperature is a room temperature, rotary drum rotation time 2.5 hours, time of repose 16 hours is ruined mao waste liquid and is reclaimed recycle 20 times; In the pickling procedure, the tanning waste liquid is reclaimed filtration, get 80 kilograms of filtrates as the pickling liquid in the pickling procedure, temperature is a room temperature, adds 6.4 kilograms of NaCl, 0.4 kilogram in formic acid, 66Be H in the pickling liquid
2SO
40.88 kilogram, rotary drum rotation time 2.5 hours, time of repose 12 hours, after the pickling waste liquid reclaimed, NaCl, Cr in the clear liquid surveyed in sedimentation
2O
3Content is added the NaCl and the tanning agent of respective amount according to processing requirement, adds in the pickling liquid recycle; In the tanning operation, tanning liquors is 50 kilograms, and temperature is 36～37 ℃, time is 12 hours, adds 0.2 kilogram of rare earth special salt, 3 kilograms of chrome tanning agents in the tanning liquors, and the tanning waste liquid reclaims and filters, the skin slag that leaches is recycled, and filtrate added in the tanning liquors in the tanning later stage, recycle; In the retanning operation, retanning liquid is 200 kilograms, and 35～38 ℃ of temperature add 2 kilograms of glutaraldehyde, 8 kilograms of retanning agent HR, 0.5 kilogram of retanning agent KRI-A, 4 hours time in the retanning liquid; Other operations are technology routinely.
The waste liquid of each operation discharging enters the comprehensive wastewater pond, qualified discharge behind preliminary sedimentation tank, grid, equalizing tank, aeration tank, air supporting machine, oxidation ditch, second pond, artificial swamp successively, sediment in preliminary sedimentation tank, equalizing tank, aeration tank, the second pond send pressure filter behind concentration basin, the peat cake that leaches is disposed filtrate separately and returned equalizing tank.
Embodiment seven
The pigskin double centner, through the raw hide group criticize, mechanical fleshing, degreasing, bag enzyme, pull off the feather of, ruin hair, multiple ash, deliming, softening, pickling, tanning, leave standstill, cut open layer, shaving, obverse leather through retanning, dyeing, drying, whole soft, covering with paint, check, classification gage, put in storage garment grain leather, two layers and third layer leather through buffing, retanning, dyeing, drying, whole soft, brushing, check, classification gage, put in storage suede garment leather; Wherein, in the degreasing process, degreasing fluid is 30 kilograms, and 35～36 ℃ of temperature add 0.75 kilogram of soda ash, 0.3 kilogram of grease-removing agent, 2 hours time in the degreasing fluid; In the bag enzyme operation, 1398 proteinase-10 .2 kilograms, 0.05 kilogram in industrial trypsinase, 1 kilogram in wheat bran, 25～28 ℃ of temperature, 36 hours time; Ruin in mao operation, ruin 30 kilograms of mao body lotions, ruin adding 0.45 kilogram of NaHS, Na in mao body lotion
20.15 kilogram of S, 1.5 kilograms of lime powders, 0.3 kilogram of auxiliary liming agent, temperature is a room temperature, rotary drum rotation time 2.5 hours, time of repose 15 hours is ruined mao waste liquid and is reclaimed recycle 10 times; In the multiple ash process, adopt the multiple ash in pond, 200 kilograms of multiple lixiviums, temperature is a room temperature, adds 10 kilograms of lime powders, 2 kilograms of auxiliary liming agents, 18 hours time in the multiple lixivium, only go out not discharge opeing of skin, multiple lixivium continues to use after replenishing 2 kilograms of lime powders, 0.6 kilogram of auxiliary liming agent and clear water; In the pickling procedure, the tanning waste liquid is reclaimed filtration, get 80 kilograms of filtrates as the pickling liquid in the pickling procedure, temperature is a room temperature, adds 6.4 kilograms of NaCl, 0.4 kilogram in formic acid, 66Be H in the pickling liquid
2SO
40.88 kilogram, rotary drum rotation time 2.5 hours, time of repose 12 hours, after the pickling waste liquid reclaimed, NaCl, Cr in the clear liquid surveyed in sedimentation
2O
3Content is added the NaCl and the tanning agent of respective amount according to processing requirement, adds in the pickling liquid recycle; In the tanning operation, tanning liquors is 50 kilograms, and temperature is 36～37 ℃, time is 12 hours, adds 0.2 kilogram of rare earth special salt, 3 kilograms of chrome tanning agents in the tanning liquors, and the tanning waste liquid reclaims and filters, the skin slag that leaches is recycled, and filtrate added in the tanning liquors in the tanning later stage, recycle; In the retanning operation, retanning liquid is 200 kilograms, and 35～38 ℃ of temperature add 2 kilograms of glutaraldehyde, 8 kilograms of retanning agent CAR, 2 kilograms of retanning agent KRI-A, 4 hours time in the retanning liquid; Other operations are technology routinely.
The waste liquid of each operation discharging enters the comprehensive wastewater pond, successively through preliminary sedimentation tank, grid, equalizing tank, aeration tank, air supporting machine, oxidation ditch, second pond, go into worker's wetland after qualified discharge, sediment in preliminary sedimentation tank, equalizing tank, aeration tank, the second pond send pressure filter behind concentration basin, the peat cake that leaches is disposed filtrate separately and returned equalizing tank.
Embodiment eight
The pigskin double centner, through the raw hide group criticize, mechanical fleshing, degreasing, bag enzyme, pull off the feather of, ruin hair, multiple ash, deliming, softening, pickling, tanning, leave standstill, cut open layer, shaving, obverse leather through retanning, dyeing, drying, whole soft, covering with paint, check, classification gage, put in storage garment grain leather, two layers and third layer leather through buffing, retanning, dyeing, drying, whole soft, brushing, check, classification gage, put in storage suede garment leather; Wherein, in the degreasing process, degreasing fluid is 40 kilograms, and 35～36 ℃ of temperature add 1 kilogram of soda ash, 0.4 kilogram of grease-removing agent, 2.5 hours time in the degreasing fluid; In the bag enzyme operation, 1398 proteinase-10 .4 kilograms, 0.1 kilogram in industrial trypsinase, 0.5 kilogram in wheat bran, 25～28 ℃ of temperature, 40 hours time; Ruin in mao operation, ruin 130 kilograms of mao body lotions, ruin adding 1.95 kilograms of NaHS, Na in mao body lotion
20.65 kilogram of S, 6.5 kilograms of lime powders, 1.3 kilograms of auxiliary liming agents, temperature is a room temperature, rotary drum rotation time 3 hours, time of repose 17 hours is ruined mao waste liquid and is reclaimed recycle 30 times; In the multiple ash process, adopt the multiple ash in pond, 200 kilograms of multiple lixiviums, temperature is a room temperature, adds 10 kilograms of lime powders, 2 kilograms of auxiliary liming agents, 20 hours time in the multiple lixivium, only go out not discharge opeing of skin, multiple lixivium continues to use after replenishing 2 kilograms of lime powders, 0.6 kilogram of auxiliary liming agent and clear water; In the pickling procedure, the tanning waste liquid is reclaimed filtration, get 80 kilograms of filtrates as the pickling liquid in the pickling procedure, temperature is 30 ℃, adds 6.4 kilograms of NaCl, 0.4 kilogram in formic acid, 66Be H in the pickling liquid
2SO
40.96 kilogram, rotary drum rotation time 3 hours, time of repose 15 hours, after the pickling waste liquid reclaimed, NaCl, Cr in the clear liquid surveyed in sedimentation
2O
3Content is added the NaCl and the tanning agent of respective amount according to processing requirement, adds in the pickling liquid recycle; In the tanning operation, tanning liquors is a double centner, and temperature is 36～37 ℃, time is 8 hours, adds 0.4 kilogram of rare earth special salt, 6 kilograms of chrome tanning agents in the tanning liquors, and the tanning waste liquid reclaims and filters, the skin slag that leaches is recycled, and filtrate added in the tanning liquors in the tanning later stage, recycle; In the retanning operation, retanning liquid is 200 kilograms, and 35～38 ℃ of temperature add 2 kilograms of glutaraldehyde, 8 kilograms of retanning agent HR, 2 kilograms of retanning agent KRI-A, 4 hours time in the retanning liquid; Other operations are technology routinely.
The waste liquid of each operation discharging enters the comprehensive wastewater pond, qualified discharge behind preliminary sedimentation tank, grid, equalizing tank, aeration tank, air supporting machine, oxidation ditch, second pond, artificial swamp successively, sediment in preliminary sedimentation tank, equalizing tank, aeration tank, the second pond send pressure filter behind concentration basin, the peat cake that leaches is disposed filtrate separately and returned equalizing tank.
Claims (9)
1. process for producing pigskin garment leather, form by following operation: the primitive pigskin group is criticized, mechanical fleshing, degreasing, bag enzyme, pull off the feather of, ruin hair, multiple ash, deliming, softening, pickling, tanning, leave standstill, cut open layer, shaving, obverse leather through retanning, dyeing, drying, whole soft, covering with paint, check, classification gage, put in storage garment grain leather, two layers and third layer leather through buffing, retanning, dyeing, drying, whole soft, brushing, check, classification gage, put in storage suede garment leather; It is characterized in that in the tanning operation, the tanning liquors ratio is 0.5～1, temperature is 36～37 ℃, time is 8～12 hours, add rare earth special salt 0.4%, chrome tanning agent 6% in the tanning liquors, the tanning waste liquid reclaims and filters, and the skin slag that leaches is recycled, filtrate added in the tanning liquors in the tanning later stage, recycle; Other operations are technology routinely.
2. process for producing pigskin garment leather according to claim 1 is characterized in that in the retanning operation that liquor ratio is 2,35～38 ℃ of temperature, add glutaraldehyde 1%, retanning agent CAR or retanning agent HR4%, retanning agent KRI-A 0～1%, carry out retanning, 4 hours time.
3. process for producing pigskin garment leather according to claim 1 is characterized in that in the pickling procedure, the tanning waste liquid is reclaimed filter, filtrate is as the pickling liquid in the pickling procedure, liquor ratio 0.8, temperature are room temperature～30 ℃, add NaCl 8%, formic acid 0.5%, 66Be H in the pickling liquid
2SO
41.1～1.2%, rotary drum rotation time 2.5～3 hours, time of repose 12～15 hours, after the pickling waste liquid reclaimed, NaCl, Cr in the clear liquid surveyed in sedimentation
2O
3Content is added the NaCl and the tanning agent of respective amount according to processing requirement, adds in the pickling liquid recycle.
4. process for producing pigskin garment leather according to claim 1 is characterized in that in the degreasing process, liquor ratio 0.3～0.4, and 35～36 ℃ of temperature add soda ash 2.5%, grease-removing agent 1%, 2～2.5 hours time in the degreasing fluid.
5. process for producing pigskin garment leather according to claim 1 is characterized in that wrapping in the enzyme operation, 1398 proteinase-10 .2～0.4%, industrial trypsinase 0.05～0.1%, wheat bran 0.5～1%, 25～28 ℃ of temperature, 36～40 hours time.
6. process for producing pigskin garment leather according to claim 1 is characterized in that ruining in mao operation, and liquor ratio 0.3～1.3 is ruined adding NaHS 1.5%, Na in mao body lotion
2S 0.5%, lime powder 5%, auxiliary liming agent 1%, temperature are room temperature, rotary drum rotation time 2.5～3 hours, and time of repose 15～17 hours is ruined mao waste liquid and is reclaimed recycle 10～30 times.
7. process for producing pigskin garment leather according to claim 1, it is characterized in that in the multiple ash process, adopt the multiple ash in pond, liquor ratio 2, temperature is a room temperature, adds lime powder 5%, auxiliary liming agent 1%, 18～20 hours time in the multiple lixivium, only go out not discharge opeing of skin, multiple lixivium continues to use after replenishing 1% lime powder, 0.3% auxiliary liming agent and clear water.
8. according to claim 1,2,3,4,5,6,7 described process for producing pigskin garment leather, the liquor ratio that it is characterized in that degreasing process is 0.3～0.4, and temperature is 35～36 ℃, adds soda ash 2.5%, grease-removing agent 1%, 2～2.5 hours time in the degreasing fluid; In the bag enzyme operation, 1398 proteinase-10 .2～0.4%, industrial trypsinase 0.05～0.1%, wheat bran 0.5～1%, 25～28 ℃ of temperature, 36～40 hours time; Ruin in mao operation, liquor ratio 0.3～1.3 is ruined adding NaHS 1.5%, Na in mao body lotion
2S 0.5%, lime powder 5%, auxiliary liming agent 1%, temperature are room temperature, rotary drum rotation time 2.5～3 hours, and time of repose 15～17 hours is ruined mao waste liquid and is reclaimed recycle 10～30 times; In the multiple ash process, adopt the multiple ash in pond, liquor ratio 2, temperature are room temperature, add lime powder 5%, auxiliary liming agent 1% in the multiple lixivium, 18～20 hours time, only go out not discharge opeing of skin, and multiple lixivium continues to use after replenishing 1% lime powder, 0.3% auxiliary liming agent and clear water; In the pickling procedure, the tanning waste liquid reclaim is filtered, filtrate is as the pickling liquid in the pickling procedure, and liquor ratio 0.8, temperature are room temperature～30 ℃, add NaCl 8%, formic acid 0.5%, 66Be H in the pickling liquid
2SO
41.1～1.2%, rotary drum rotation time 2.5～3 hours, time of repose 12～15 hours, after the pickling waste liquid reclaimed, NaCl, Cr in the clear liquid surveyed in sedimentation
2O
3Content is added the NaCl and the tanning agent of respective amount according to processing requirement, adds in the pickling liquid recycle; In the tanning operation, the tanning liquors ratio is 0.5～1, and temperature is 36～37 ℃, time is 8～12 hours, adds rare earth special salt 0.4%, chrome tanning agent 6% in the tanning liquors, and the tanning waste liquid reclaims and filters, the skin slag that leaches is recycled, and filtrate added in the tanning liquors in the tanning later stage, recycle; In the retanning operation, liquor ratio is 2, and 35～38 ℃ of temperature add glutaraldehyde 1%, retanning agent CAR or retanning agent HR4%, retanning agent KRI-A 0～1%, carry out retanning, 4 hours time; Other operations are technology routinely.
9. according to claim 1,2,3,4,5,6,7 described process for producing pigskin garment leather, the waste liquid that it is characterized in that each operation discharging enters the comprehensive wastewater pond, qualified discharge behind preliminary sedimentation tank, grid, equalizing tank, aeration tank, air supporting machine, oxidation ditch, second pond, artificial swamp successively, sediment in preliminary sedimentation tank, equalizing tank, aeration tank, the second pond send pressure filter behind concentration basin, the peat cake that leaches is disposed filtrate separately and returned equalizing tank.
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| CNB021339473A CN100376693C (en) | 2002-10-23 | 2002-10-23 | Process for producing pigskin garment leather |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102586508A (en) * | 2011-12-26 | 2012-07-18 | 河北东明牛皮制革有限公司 | Production method of leather for cow leather clothes |
| CN102703619A (en) * | 2012-06-07 | 2012-10-03 | 故城县海青皮草有限公司 | Energy-saving and environment-friendly mink skin tanning method |
| CN104232807A (en) * | 2013-06-24 | 2014-12-24 | 潘龙祥 | Method for removing hairs of leather by virtue of ash alkali |
| CN104232806A (en) * | 2013-06-24 | 2014-12-24 | 潘龙祥 | Method for manufacturing leather |
| CN104962666A (en) * | 2015-06-13 | 2015-10-07 | 林善溪 | Pollution-free leather manufacturing technology |
| CN107245536A (en) * | 2017-06-13 | 2017-10-13 | 安徽宜民服饰有限公司 | A kind of clothes leather processing method |
| CN108559806A (en) * | 2018-04-24 | 2018-09-21 | 安徽乐踏鞋业有限公司 | A kind of Animal Skin processing method for tanning |
| CN108823337A (en) * | 2016-12-30 | 2018-11-16 | 丁永新 | The preferable leather composite tanning agent of compatibility |
| CN109852738A (en) * | 2019-03-15 | 2019-06-07 | 宜昌所罗门文化传播有限公司 | A kind of multi-functional tanning reactive tank |
| CN113528716A (en) * | 2021-08-02 | 2021-10-22 | 青岛永昌因特皮革有限公司 | Clean type tanning production system |
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| BG24489A1 (en) * | 1977-02-28 | 1978-03-10 | Pantaleev | Method of pickling and tanning pigskin |
| RO96389A2 (en) * | 1986-09-13 | 1989-02-28 | Intreprinderea De Piele,Incaltaminte Si Marochinerie "13 Decembrie",Ro | CONTINUOUS PROCESSING PROCESS OF PORK FOOD |
| RO102841B1 (en) * | 1988-03-04 | 1991-12-30 | îNTREPRINDEREA DE PIELE SI MANUSI | Chrome tannage method for pig skin destined to gloves |
| CN1020475C (en) * | 1989-01-04 | 1993-05-05 | 袁守熙 | Non-pollution dual tanning technology for glutaric aldehyde pigskin leather |
| CN1070689A (en) * | 1991-09-17 | 1993-04-07 | 庆巴图 | Carbamide ring tanning agent and vegetable tanning agent are in conjunction with the method for tanning bottom leather |
| CN1142294C (en) * | 2001-05-08 | 2004-03-17 | 四川大学 | Acid-free chromte tannage agent and its prepn |
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| CN102586508B (en) * | 2011-12-26 | 2014-06-18 | 河北东明牛皮制革有限公司 | Production method of leather for cow leather clothes |
| CN102586508A (en) * | 2011-12-26 | 2012-07-18 | 河北东明牛皮制革有限公司 | Production method of leather for cow leather clothes |
| CN102703619B (en) * | 2012-06-07 | 2016-05-25 | 故城县海青皮草有限公司 | A kind of energy saving and environment friendly standard mink skin process for tanning |
| CN102703619A (en) * | 2012-06-07 | 2012-10-03 | 故城县海青皮草有限公司 | Energy-saving and environment-friendly mink skin tanning method |
| CN104232807A (en) * | 2013-06-24 | 2014-12-24 | 潘龙祥 | Method for removing hairs of leather by virtue of ash alkali |
| CN104232806A (en) * | 2013-06-24 | 2014-12-24 | 潘龙祥 | Method for manufacturing leather |
| CN104962666A (en) * | 2015-06-13 | 2015-10-07 | 林善溪 | Pollution-free leather manufacturing technology |
| CN104962666B (en) * | 2015-06-13 | 2017-03-01 | 林善溪 | A kind of pollution-free tanning technique |
| CN108823337A (en) * | 2016-12-30 | 2018-11-16 | 丁永新 | The preferable leather composite tanning agent of compatibility |
| CN107245536A (en) * | 2017-06-13 | 2017-10-13 | 安徽宜民服饰有限公司 | A kind of clothes leather processing method |
| CN108559806A (en) * | 2018-04-24 | 2018-09-21 | 安徽乐踏鞋业有限公司 | A kind of Animal Skin processing method for tanning |
| CN109852738A (en) * | 2019-03-15 | 2019-06-07 | 宜昌所罗门文化传播有限公司 | A kind of multi-functional tanning reactive tank |
| CN113528716A (en) * | 2021-08-02 | 2021-10-22 | 青岛永昌因特皮革有限公司 | Clean type tanning production system |
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