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1360results about "Pre-tanning chemical treatment" patented technology
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Compositions and Methods for Targeted Thermomodulation
ActiveUS20120059307A1Reduce accumulationAntibacterial agentsCosmetic preparationsMedicineNanoparticle
Owner:CORONADO AESTHETICS LLC
Engineered leather and methods of manufacture thereof
Engineered animal skin, hide, and leather comprising a plurality of layers of collagen formed by cultured animal collagen-producing (e.g., skin) cells. Layers may be formed by elongate multicellular bodies comprising a plurality of cultured animal cells that are adhered and / or cohered to one another; wherein the elongate multicellular bodies are arranged to form a substantially planar layer for use in formation of engineered animal skin, hide, and leather. Further described herein are methods of forming engineered animal skin, hide, and leather utilizing said layers of animal collagen-producing cells.
Owner:MODERN MEADOW INC
Mixed Sugar Compositions
Novel mixtures of sugar amides or sugar amines are disclosed that have improved thermal properties over the individual components. New feedstocks based on both the surfactant tail as well as the sugar head group allow for improved physical properties of sugar amide surfactant mixtures and thus improved formulatability. Furthermore, new sources of unique methyl esters from both bioengineering and or co-metathesis of fats and oils provide novel and improved sugar amide surfactant mixtures.
Owner:THE PROCTER & GAMBLE COMPANY
Production technology of cow skin nappa leather
ActiveCN105132596AUniform leatherImprove leather yieldLeather manufacturingTanning treatmentFiberManufacturing technology
The invention relates to the technical field of the leather manufacturing technology, and provides a production technology of cow skin nappa leather. A series of problems that due to the fact that the structure of the abdomen and the part between the ribs and the hips of the cow skin is thin and fiber is woven loosely, in the processing process, the part of the abdomen and the part between the ribs and the hips are prone to being excessively loose, the part deviation is large, and face loosening is likely to happen are solved through the production process of the cow nappa soft-face leather. The integral procedure of the technology is simple, easy to achieve, convenient to operate and practical. The grain on the abdomen and the part between the ribs and the hips is easy to open in the tan preprocessing working section of the cow skin through tanning preprocessing, retanning processing and post-tanning mechanical processing, and the whole skin body fiber is even and loose. Even and slow tanning is carried out in the tanning working section, step-by-step and multi-time even filling is carried out in the retanning working section, the whole cow skin leather is even and consistent in the manner that filling is conducted after loosening, the leather is soft but not loose, and the leather yield and the utilization rate of finished cow skin are greatly increased.
Owner:XINGYE LEATHER TECH CO LTD
Tanning production process capable of recycling waste water repeatedly from soaking to dyeing
ActiveCN102534056AImprove firmnessHigh fullnessTanning treatmentPre-tanning chemical treatmentWastewaterSewage
The invention provides a tanning production process capable of recycling waste water repeatedly from soaking to dyeing, which is characterized in that waste liquid recycling is conducted in procedures of pre-soaking, main-soaking, liming, deliming and softening, pickling and chrome tanning, retanning, neutralizing and dyeing step by step, and waste liquid in all the procedures achieves full-closed circulation recycling. The technology is tested and verified in actual production in a tanning workshop of BIOSK (sq) Chemicals Co. Limited. The process achieves recycling of waste water from the pre-soaking to the dyeing, sewage discharging is greatly reduced, a problem of tanning pollution is solved thoroughly, quality of finished leather can be guaranteed simultaneously, loose side rate of the finished leather is effectively reduced, degree of compacting and fullness of the finished leather is improved, chemical materials can be saved by 15% to 55%, for example, chromium powder is saved by 35% to 65%, partial chemical materials can be saved by more than 90%, and exceptional chemical materials such as salt can be saved by 100%.
Owner:宝斯卡(商丘)化工有限公司
Electrolyzed water treatment for meat and hide
InactiveUS20050244556A1Electrolysis componentsLiquid separation by electricityElectrolysisIndividual animal
Owner:ELECTRIC AQUAGENICS UNLMITED
Consumer Products Comprising Silane-Modified Oils
InactiveUS20140335032A1Strong repellencyLessened softnessCosmetic preparationsBiocideSilica particleSilylene
A consumer product comprises silane-modified oil comprising a hydrocarbon chain selected from the group consisting of: a saturated oil, an unsaturated oil, and mixtures thereof; and at least one hydrolysable silyl group covalently bonded to the hydrocarbon chain. The consumer product further comprises a hydroxyl functional organic species and is substantially free of silica particles.
Owner:THE PROCTER & GAMBLE COMPANY
Hair analysis method
InactiveUS6949344B1Reliable solubilizationAccurate methodPre-tanning chemical treatmentMicrobiological testing/measurementBetaineDigestion
A method the direct analysis of an analyte in keratinized structures, e.g., hair and fingernails, which comprises preparing a mixture containing a low redox potential activator compound such as dithiothreitol or dithioerythritol, an enzyme suitable for the digestion of the keratin structure, a sample of the keratin structure and a biological detergent that aids the digestion of the keratinized structure at a relatively low pH, e.g., between about 6.2 and 8; permitting the enzyme to at least substantially digest the sample of keratin structure, and subjecting the digest solution to analysis, preferably by radioimmunoassay, to determine the identity and amount of analyte in the keratin structure sample. To accelerate the method, cupric sulfate may be added to the mixture after degradation of the keratin sample. The enzyme may be a peptidase, endopeptidase or proteinase, with papain, chymopapain, and proteinase K being preferred for use in the invention. The preferred biological detergents include betaine, sulfo-betaine, alkylglucosides and bile acids.
Owner:PSYCHEMEDICS CORPORATION
Animal fur clean depilation and fur fiber loosing method for preparing leather and application thereof
ActiveCN101235421AEliminate pollution and other issuesFine grainPre-tanning chemical treatmentFiberEnzyme system
The invention provides a method for unhairing leather and loosening leather fiber without sodium sulfide and lime in a leather production process and the application of the method. The method is characterized in that a method for combining unhairing by non-sulfur (sodium sulfide) depilatory under the alkaline condition and enzyme fiber loosening under the under the non-lime (lime) alkaline swelling condition are adopted, the enzyme unhearing and the enzyme fiber loosening take protease, lipase, amylase and glucoamylase as a compound enzyme system. The method achieves the effects for unhairing and loosening the leather fiber through adopting the method for combining compound enzyme water immersion, compound enzyme unhairing, unhairing with sodium sulfide depilatory, expansion regulator-sodium hydroxide expansion and the enzyme unhairing under the alkaline condition and eliminates the pollution which is brought by the sodium sulfide and the lime in animal unhairing or leather fiber loosening procedures in the leather production process. The method of the invention is suitable for unhairing and leather fiber dispersed processing of various animal leather of leather with various usages.
Owner:SICHUAN UNIV +1
Method for dehydrating biological tissue for producing preserved transplants
InactiveUS6942961B1Dehydration fastEasy to operatePre-tanning chemical treatmentDead animal preservationFreeze-dryingSolvent
The invention relates to a two-step method for dehydrating biological tissues for producing preserved transplants. In a first step, the tissue is partially dehydrated with an organic, water-miscible solvent. In a second step, the tissue is dehydrated further by freeze drying.
Owner:TUTOGEN MEDICAL INC
Enzymatic peracid generation for use in hair care products
InactiveUS20120317733A1Low tensile strengthCosmetic preparationsHair removalHair straighteningHair removal
Disclosed herein are compositions and methods to treat hair with a peracid-based benefit agent. The peracid benefit agent can be used for hair bleaching, hair weakening, hair removal, hair waiving, hair straightening or any combination thereof. The peracid may be enzymatically generated from a carboxylic acid ester substrate using an enzyme having perhydrolytic activity (perhydrolase) in the presence of a source of peroxygen. A fusion protein comprising the perhydrolase coupled to a hair-binding domain, either directly or through an optional linker, may be used to target the perhydrolytic activity to the hair surface.
Owner:EI DU PONT DE NEMOURS & CO
Collagen membrane made from porcine skin
Collagen membranes are formed from porcine rinds (i.e., pig skins) for us in a variety of applications and, most preferably, for wrapping food products, such as hams and the like. First, after removing skins from the porcine, the skins are promptly frozen. In later processing, the rinds are thawed and then enzymatically defatted. Then, a quick alkalinic hydrolyzation is performed on the rinds. Then, an acidic hydrolyzation is performed on the rinds. The rinds are then ground into a gel-like fluid mass. Finally, the fluid mass is extruded, sheeted and dried into a collagen membrane. The collagen membrane produced can be, in preferred embodiments, used for wrapping food products, such as hams.
Owner:ED GEISTLICH SOHNE FUR CHEM IND
Manufacturing process of semi-vegetable tanned wrinkled leather of cow leather
InactiveCN102080134AQuality assuranceReduce contentTanning treatmentPre-tanning chemical treatmentPulp and paper industryHexavalent chromium
The invention relates to a manufacturing process of the semi-vegetable tanned wrinkled leather of cow leather, which comprises the working procedures of initial tanning, deacidifying, vegetable tanning, filling and dry finishing. In the method provided by the invention, firstly tanning is carried out on raw hide by a small quantity of chromium tanning agent and then by a vegetable tanning agent, thereby under the premise of guaranteeing the quality of the leather, greatly reducing the content of chromium in tanning waste liquid, lightening the pollution of the chromium to the environment and effectively inhibiting the generation of hexavalent chromium through the vegetable tanning agent in the leather; and meanwhile, the granule surface of the leather is tightened through the working procedures of dry finishing and coating, and natural winkles are formed on the granule surface, thereby covering the injury of the granule surface of the leather and improving the additional value of the leather.
Owner:锦兴皮业科技有限公司
Method for chrome-free tanning beach woolfell by adopting chrome-free tanning agent
InactiveCN102758029AHigh whitenessLow free formaldehyde contentTanning treatmentPre-tanning chemical treatmentSewageSewage treatment
The invention discloses a processing method for chrome-free tanning a beach woolfell by adopting a chrome-free tanning agent DESOTAN H30, which comprises the following steps: soaking, fleshing, degreasing, softening, pickling, tanning, extracting alkali, wet grinding, re-tanning, drying, wetting back, dry cleaning, staking, conditioning, reducing, oxidizing, drying, wetting back, staking, dry grinding, dedusting, and obtaining the finished product. The method is the technology for preparing the beach white woolfell, adopts the chrome-free tanning agent to process the beach white woolfell, uses no chrome during the tanning process, and obtains the finished product, which is pure white, slightly curled and distinctive in style, keeps the natural property, contains less than 150ppm of free formaldehyde, has a shrinkage temperature higher than 75 DEG C and has practical production significances. The technology can not only realize zero emission of waste chrome and lower the sewage treatment cost for an enterprise, but also obtain the finished product which is pure white, slightly curled and artistic in appearance, feels plump and soft, contains 130mg / kg of formaldehyde and has a shrinkage temperature of 75 DEG C.
Owner:SHAANXI UNIV OF SCI & TECH +1
Circularly-tanning technology for chrome tanning liquor of sheep garment leather
InactiveCN102586505APure white coatFull coatTanning treatmentPre-tanning chemical treatmentLeather industryFlocculation
The invention discloses a circularly-tanning technology for chrome tanning liquor of sheep garment leather. The circularly-tanning technology comprises the following steps: conditioning, drying, shearing, main-soaking, fleshing, degreasing, pickling, softening, disacidifying, softening, pickling, tanning, wet grinding, retanning, neutralizing, adding grease, retanning, dyeing hair, and dyeing plates. According to the circularly-tanning technology for chrome tanning liquor of sheep garment leather, the formation of hexavalent chromium can be effectively reduced, and the chrome waste liquor flocculation is omitted. According to the test on the chrome content after the chrome tanning liquor is utilized, the chrome waste liquor can be recycled repeatedly by supplementing corresponding chrome powder during next-time recycling, thereby realizing the clean production of tanned leather industry. According to the circularly-tanning technology, the sealed no-emission utilization of a chrome resource can be guaranteed so as to greatly reduce environmental pollution, effectively lower waste water emission and save enterprise waste treatment and production cost. In addition, the quality of the produced leather is consistent with that of the common chrome tanned leather, the shrinkage temperature is above 100DEG C, and a leather body is soft, plump and flexible, is colorful, has pure white hair and has no effect on the dyed hair and the dyed plates.
Owner:ZHEJIANG ZHONGHUI FUR & LEATHER +2
Environment-friendly type crust leather production method
ActiveCN103060488AEmission reductionCreate pollutionTanning treatmentPre-tanning chemical treatmentChromiumIon
The invention discloses an environment-friendly type crust leather production method, and aims at solving the problems that in a crust leather production method using conventional chrome tanning as basis, plenty of chromium ions are contained in waste water and cannot be effectively processed, plenty of leather wastes with chrome are also generated, and the environment is seriously polluted. The production method comprises the following steps of non-pickling tanning, retanning filling, dyeing fat liquoring and chrome retanning. The method adopts non-pickling non-chrome tanning technology, so solid wastes with the chrome cannot be generated. At the same time, through mutual matching with other procedures, finished leather shrinkage temperature and performance can be effectively improved so as to meet demands of leather production. At the last, the chrome retanning is adopted, only a path of waste water with the chrome is generated, waste water quantity is small, and the waste water is easy to recover and process. Therefore, compared with an existing crust leather production method using a chrome tanning method as basis, cleaning degree is high, the waste water quantity with the chrome can be effectively reduced, and the waste water is convenient to recover and process. At the same time, the leather wastes with the chrome cannot be produced, and the method is environment-friendly.
Owner:四川亭江新材料股份有限公司 +1
Method for making environment-friendly artificial leather from ultra micro fiber without solvent treatment
InactiveUS20060218729A1Not consuming much energyPre-tanning chemical treatmentTextiles and paperSolventNonwoven fabric
There is disclosed a method for making environment-friendly artificial leather from ultra micro fiber without solvent treatment. The method includes the step of making at least two components into ultra micro fibers, as raw materials, by means of conjugate spinning. By means of spun lacing or water lacing, three-dimensional interlacing is conducted on the ultra micro fibers in order to provide non-woven fabric, as a substrate. After the substrate is impregnated with water-borne resin solution, salt solution is used to solidify the water-borne resin solution in the substrate. The sea component of the ultra micro fibers is removed by means of alkaline. Abrading and finishing are conducted in order to obtain a semi-product of the environment-friendly artificial leather. The semi-product is dyed or water-borne resin is adhered to the semi-product in order to provide the environment-friendly artificial leather made from the ultra micro fibers without solvent treatment, providing a leather-like feel and excellent softness and physical properties.
Owner:SAN FANG CHEM IND
Clean process for producing leather by using sturgeon skin
The invention discloses a clean process for producing leather by using sturgeon skin, which comprises the following steps of: immersing sturgeon into water, manual meat removing, degreasing, oil slick scratching, ash immersing, dying, ash immersing, oil slick scratching, ash restoring, oil slick scratching, deliming without ammonium, oxidation bleaching, acid etching, reduction bleaching, softening, organophosphorus tanning or oxazolidine tanning, dyeing and fat-liquoring, aluminum retanning or zirconium retanning, washing, hung airing and drying and finishing. According to the clean process, the sturgeon skin is tanned by adopting an organophosphorus tanning or oxazolidine tanning agent and a chrome-free tanning process; a less-sulfur liming and deliming without ammonium clean process is adopted in the tanning process, so that the harm of heavy metal chromium to the environment and a human body can be avoided, the emission of sulphide and the consumption of lime are reduced, the content of ammonia nitrogen in wastewater is reduced and the cost of sewage treatment of enterprises is saved; in addition, the produced environmentally-friendly sturgeon skin is soft in hand feeling, plump, rich in elasticity and flat and fine in particle surfaces, and keeps beautiful and complete natural squama.
Owner:王学川 +1
Process for producing leather
ActiveCN102586497ARelieve pressureLow costLeather manufacturingPre-tanning chemical treatmentEngineering
The invention relates to the field of the manufacture of leather and provides a process for producing the leather. The production cost is reduced by changing the formula of the process. The process comprises the following steps of: preparing a crust, milling the crust, toggling, tumbling, trimming, patching, buffing, blowing dust and cleaning, spraying cations, tumbling for the second time, spraying, repairing corners, tumbling for the third time, trimming for the second time, rolling, obtaining G gloss, pressing a plate, spraying for the second time, obtaining water gloss, tumbling for the fourth time, milling for the second time, staking, tumbling for the fifth time, and spraying a handle agent.
Owner:XINGYE LEATHER TECH CO LTD
Method for carrying out unhairing and liming treatment without dust and akali sulphide during buffalo hide tanning
ActiveCN101445843AEasy to handleSo as not to damagePre-tanning chemical treatmentSodium hydrosulfidePollution
Owner:国家皮革质量监督检验中心(浙江) +1
Dual-purpose modification process for native breed sheepskin leather
InactiveCN102839236AHas softnessIncrease shrinkage temperatureTanning treatmentPre-tanning chemical treatmentExtensibilityWork in process
The invention discloses a dual-purpose modification process for native breed sheepskin leather. The process sequentially comprises the following steps of processing native breed sheepskin semi-finished products: (1) classifying skin; (2) returning water; (3) soaking; (4) softening; (5) pickling; (6) performing chromium aluminum tanning; (7) performing tanning post-processing; (8) performing chrome retanning; (9) performing chrome retanning before dyeing; and (10) dyeing. According to the dual purpose modification process, commercially available native breed semi-finished skin (namely white skin) is processed, and the native breed semi-finished skin is tanned by increasing aldehyde aluminum tanning particularly, so that the extensibility of the native breed sheepskin can be effectively improved, the problem of dyeing defects is solved, and the uniformity in the post dyeing is ensured. The dual purpose modification process is matched with other steps and appropriate additives, and each additive is added according to reasonable additive amount, so that the final products have good handfeeling, high tearing resistance and high fullness, and the quality of the native breed sheepskin leather is greatly improved.
Owner:桐乡市雄鹰皮草股份有限公司
Condensation type laundry dryer
ActiveUS7984568B2Improve mechanical rigidityEfficient productionTeeth fillingPre-tanning chemical treatmentEngineeringLaundry
A condensation washer-dryer, in particular, the air-guiding process. The base module is used to receive function parts and components of the air guide and is closed on the rear side by means of a process air cover and forms a plastic, stable support structure for the washer-dryer. The connecting surfaces are large and extend, preferably, over the entire width of the washer-dryer. Due to said embodiment, air guiding channels are formed in a simple manner on the rear side of the base module and the housing of the process air ventilator is closed on the rear side. Sealing elements are no longer required due to said welding of said type of connection and an exceptionally high mechanical rigidity is obtained.
Owner:BSH BOSCH & SIEMENS HAUSGERAETE GMBH
Sturgeon skin chrome tanning leather production process
InactiveCN102199676ALow fat contentImprove use valueTanning treatmentPre-tanning chemical treatmentSturgeonLeather production processes
The invention discloses a sturgeon skin chrome tanning leather production process, which comprises the following steps: immersing in water; removing meat manually; degreasing; scraping oil slick; liming; scraping oil slick; liming again; scraping oil slick; deliming and softening; bleaching by oxidization; pickling; bleaching by reduction; chrome tanning; dyeing and greasing; re-tanning; washing; hanging and drying; and coating. In the invention, when the sturgeon skin chrome tanning leather production is adopted, the grease content in the sturgeon skin can be reduced obviously and the color of particle surface of the back of the sturgeon skin can be lightened; and thus, dyeing or production of light leather can be facilitated, the finished leather retains the natural attractive scales and special textures of sturgeon skin, the utilization value of the sturgeon skin is improved greatly, and the added value of the product is increased obviously.
Owner:王学川 +1
Novel process for recycling waste leather-making liquid step by step
ActiveCN101921881AReduce loose surface rateImprove firmnessTanning treatmentPre-tanning chemical treatmentWastewaterProcess engineering
The invention provides a novel process for recycling waste leather-making liquid step by step, which is characterized by carrying out waste liquid recycling step by step in the procedures of presoaking, soaking, liming, deliming for softening and pickling for chrome tannage. The waste liquid in all the procedures are recycled in a whole sealing way. The invention realizes the wastewater recycling from original leather to wet blue leather and can ensure the quality of the wet blue leather at the same time, greatly save cost on pollution control and material decomposing and greatly reduce sewage discharge.
Owner:宝斯卡(商丘)化工有限公司
Production method of negative oxygen ion multifunctional automotive trim leather
ActiveCN107312895AIncrease the fragranceFeel goodTanning treatmentPre-tanning chemical treatmentLiquid ratioKnurling
The invention relates to a production method of a negative oxygen ion multifunctional automotive trim leather. The production method comprises fleshing, liming, deliming, softening, pickling, tanning, retanning, neutralization, dyeing, fat liquoring, drying, softening, bottom coating, middle coating, knurling and top coating; in the pickling and tanning steps, salt is added for pickling, and aldehyde is added for tanning; the pickling by adding the salt is as follows: the leather is washed by softening water; the liquid ratio is 50%; by 100 mass parts of the leather, 50 parts of water are added; the temperature is controlled at 20+-2 DEG C; 7 parts of sodium chloride are added for reaction by 15 minutes; then, 0.5 part of 10 wt% of dilute formic acid is added for reaction by 30 minutes; then, 0.5 part of 10 wt% of dilute formic acid is added for reaction by 30 minutes; 0.35 part of 5 wt% of dilute sulfuric acid is added for reaction by 30 minutes; sulfuric acid is added again by the same mode for reaction by 90 minutes; after dilute sulfuric acid is added, the pH value is controlled within 2.8+-0.1; and the reaction is performed by 60 minutes. The production method has the functions of constant release of negative oxygen ions, sterilization and bacteria resistance, achieves the effect of efficiently absorbing, decomposing and degrading such harmful gas as formaldehyde, and achieves softness and excellent shaping property.
Owner:HAINING SENDE LEATHER
Split Leather for Car Seats and Manufacturing Method Thereof
InactiveUS20080299406A1Maximally maintain propertyCost advantageVehicle seatsTanning treatmentCar seatEngineering
Disclosed herein are split leather for car seats and a manufacturing method thereof. The method comprises a preparation process, a tanning process, a pre-dyeing process, a dyeing process, a drying process and a finishing process, wherein the method comprises, after the preparation process, but before the tanning process, a re-splitting process of splitting pelt into an upper grain layer and a split layer, having a thickness of 2.5-4 mm, and re-splitting the split layer to have a thickness of 1.8-2.5 mm starting from the upper side thereof, thus obtaining split leather, and the finishing process comprises sequentially forming a roll base sealing layer, a roll base cover layer, a medium color top coating layer and a final top coating layer on the split leather, thus treating the surface of the split leather. The split leather for car seats has a luxuriousness close to that of full-grain leather and a soft touch and feel, and can give customers a cost advantage. Also, the range of selection of raw material for manufacturing car seat leather can be widened, and waste can be recycled to thus reduce the generation of waste, thus being helpful to the environment. In addition, leather seats can be diversified and a new product group can be created.
Owner:NAM CHUNG
Method for preparing cleaned three-proofing cow split leather and prepared cleaned three-proofing cow split leather
ActiveCN102676710AGood flexibilityReduce Chromium PollutionTanning treatmentPre-tanning chemical treatmentWater solubleFluoride
The invention discloses a method for preparing cleaned three-proofing cow split leather and prepared cleaned three-proofing cow split leather. Cow split blue wet leather serving as a raw material is subjected to the steps of water return, preliminary fat-liquoring chromium-free retanning, neutralization, filling, dyeing, fat liquoring, fixing, fireproof treatment, drying and the like to prepare the cleaned three-proofing cow split leather. A waterproof anti-fouling agent and a flame retardant are added in the preparation process to enable the three-proofing cow split leather to have waterproof, anti-fouling and fireproof functions, wherein the waterproof anti-fouling agent is a water-soluble fluoride, and the flame retardant is an inorganic flame retardant. The method has the advantages of being high in cleaning degree, small in water discharge amount, short in production period and low in cost, and the three-proofing cow split leather is good in waterproof, anti-fouling and fireproof effects.
Owner:JINAN LURI JUNDA LEATHER
Ecofriendly bio-process for leather processing
The present invention relates to an eco-friendly beam house process for de-hairing of leather using commercially available enzymes that obviates the use of lime and other alkalis. The present invention also provides an alternate process for opening the fibers of leather using commercially available enzymes. The present invention further provides a three-step process for tanning hide or skin in a narrow pH range of from about 7.5 to about 8.5.
Owner:COUNCIL OF SCI & IND RES
Method for manufacturing washable cow split leather
ActiveCN107502685AFully rehumidifiedImprove washing resistanceTanning treatmentPre-tanning chemical treatmentSofteningChemistry
The invention relates to a method for manufacturing washable cow split leather and belongs to the technical field of manufacture of leather. The method comprises the following steps: taking a cow split leather blank subjected to wringing and shaving, and sequentially performing re-wetting, primary washing, retanning, neutralizing, secondary washing, filling, dyeing, stuffing, acid solidification, thrice washing, fixing, quartic washing, drying, hanging and airing, vibratory softening, leather fluffing and milling. The washable cow split leather manufactured by the method has favorable washability, and is high in leather yield.
Owner:漳州香洲皮革有限公司
Non-chromium leather tanning method
The invention provides a non-chromium leather tanning method. The non-chromium leather tanning method comprises the following steps of: (a) pre-treating animal skin, soaking in water and weighing, and soaking in gangue to obtain gangue skin; (b) carrying out deliming, softening and primary pickling onto the raw gangue skin to obtain raw skin; (c) carrying out secondary pickling onto the raw skin; (d) tanning the raw skin after the secondary pickling; (e) primarily fixing the tanned raw skin in formic acid for 30 minutes after carrying out oxidizing, aldehyde-removing and re-tanning; and carrying out neutralizing treatment after rinsing for 60 minutes by virtue of oxalic acid; and (f) getting out the raw skin after the neutralizing treatment from a rotary drum after carrying out fat liquoring, secondary fixing, and water-washing, drying the raw skin after primary stabbing, re-moistening for 20 hours, knocking and softening for 8 hours, and carrying out secondary stabbing and drying to obtain the tanned leather. The leather tanning method provided by the invention is free of chromium-containing preparation, so that the leather processing process is more environment-friendly, and the harms to the construction staffs are reduced.
Owner:何裕华
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