242results about "Leather softening" patented technology

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.

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.

The invention relates to the technical field of leather manufacturing process, and provides a waterproof chrome-free tanning leather manufacturing process. The manufacturing process comprises the steps that firstly, organic silicone modified polyurethane resin, an organic synthetic tanning agent and a polymetallic complex tanning agent are used for pickling-free and chrome-free combined tanning; then chrome-free retanning and chrome-free fixing are carried out by using the polymetallic complex tanning agent, and a waterproof polymer and a waterproof fatliquoring agent are used for filling andfatliquoring; the obtained chrome-free tanning leather has excellent waterproofing performance, and has both good physical and chemical properties and subsequent processing performance. During the process of implementation of the waterproof chrome-free tanning leather manufacturing process, by using cleaner production technologies such as ammonia-free deliming and softening co-bath, pickling-freeand chrome-free combined tanning and chrome-free retanning and chrome-free fixing, the prepared waterproof chrome-free leather is ecological and environmentally-friendly and excellent in waterproofingperformance, and pollution of heavy metal chromium is eliminated from a source; and the technical process is simple, the practicability is high, and the waterproof chrome-free tanning leather manufacturing process is suitable for industrial application.

A multifunctional station for leather product treatment includes at least a cavity with inner part and at least an upper cover casing of a air exhaust port connected with a vacuum pump. The upper cover casing is predetermined to connect with at least a steam interface of peripheral steam generator. Each cavity is provided with at least a near infrared radiation type heating lamp, and a reflection plate with parabolic profile and with inner reflection surface treated through mirror, which is disposed around the middle luminous part of the heating lamp. Each upper cover casing is capable of combining temporarily with corresponding lower carrying tray for putting the treated leather products. No matter the multifunctional station for leather product treatment is set independently, or disposed along continuous production line, the operation of upper cover casing is capable of being programmed through an automatic control element, and performing treatment to the leather products, e.g. drying activation of agglutinant or softening, setting of leather products, etc.

The invention relates to a machining device, in particular to a leather softening device to achieve the technical purpose. To achieve the technical purpose, the leather softening device is provided and comprises a support, a base, a protective layer, a softening groove, heating wires, a moving mechanism, a pressing and hitting device and the like. The softening groove is formed in the top of the base. Cavities are formed in the right side of the left wall and the left side of the right wall of the softening groove. The heating wires are arranged in the cavities. The protective layer is arranged on the inner bottom of the softening groove. The support is arranged on the right side of the top of the base. The moving mechanism is arranged on the top of the left side of the support. The pressing and hitting device is arranged on the bottom of the moving mechanism. The bottom of the pressing and hitting device is located in the softening groove. The leather softening device achieves the effects that mechanical pressing and hitting replaces manual treading to relieve the working burden of workers, and the working efficiency and safety coefficients are high.

The invention relates to a preparation method for leather and provides a preparation method for half-vegetable tanning knurled soft leather which is high in finished leather area yield, uniform in thickness and high in leather production performance. The soft leather prepared by adopting the preparation method disclosed by the invention has natural lines; the loose surface rate is reduced, the using amount of grease is lowered, and the leather production cost can be effectively reduced; the finished leather area yield is increased, and the leather production economical benefit is improved. The preparation method comprises the following technical steps of (1) preparing blue wet leather; (2) treating the blue wet leather; (3) performing preliminary uniform cutting; (4) performing bleaching and preliminary retanning dyeing; (5) performing secondary cutting; (6) performing secondary retanning dyeing; (7) performing aftertreatment.

The invention discloses a method for performing multiple-step treatment on sheepskin by using biological enzymes, which is characterized in that industrial pancreatic enzymes, composite enzymes TA for acid pickling and softening and composite enzymes TB for acid pickling and softening are respectively used for performing softening treatment on sheepskin in an enzyme softening procedure and an acid pickling procedure; and the treated sheepskin is processed through the conventional process, thereby obtaining the very soft and lightweight sheepskin. Thus, the quality and added values of the sheepskin and products thereof are greatly improved.

The invention relates to a manufacturing method of bicolor wax-texture crack split leather and belongs to the technical field of leather. The manufacturing method of the bicolor wax-texture crack split leather comprises the following steps that processed and dyed split leather is obtained, dried, ground, milled, sprayed for the first time, roll-finished, sprayed for the second time, vibration-softened, rolled with oil wax and milled in sequence, and thus the bicolor wax-texture crack split leather is obtained. According to the manufacturing method of the bicolor wax-texture crack split leather, the processed and dyed split leather is dried, ground, milled, sprayed for the first time, roll-finished, sprayed for the second time, vibration-softened, rolled with the oil wax and milled, and the technological conditions of the steps and the chemical therapy ratio are strictly controlled and optimized, so that the low-level split leather is manufactured into the high-level crack leather with the wax texture, and the crack leather further has the strong bicolor contrast effect.

The invention discloses a leather production process, which comprises the steps of 1) lot grouping: classifying the raw hides of leathers similar in width size and thickness; 2) soaking in water: soaking the raw hides in water after the lot grouping step; 3) unhairing and degreasing: removing grease in hide cells and hairs on the surfaces of the raw hides; 4) liming: adding alkali to expand the hides to a certain thickness for facilitating the splitting operation; 5) deliming and pickling: removing redundant alkali in the raw hides during the liming step; 6) tanning: connecting collagen groups in hide fibers by means of trivalent chromic ions, and enhancing the tensile strength and the anti-tear intensity of the leather; 7) re-tanning: selecting a retanning agent of better in filling effect to retan the tanned leather; 8) dyeing; 9) fatliquoring; 10) drying; 11) staking; 12) finishing; 13) examining and warehousing finished products. The leather production process is simple in operation, and the produced leather is good in durability. Meanwhile, the cost of manufacturers is saved, and the requirements of customers can be met at the same time.

The invention provides a manufacturing method of sofa leather, and solves the technical problems of more complicated steps, need of spending a lot of manufacturing time, complicated manufacturing andthe like in a traditional manufacturing method. The manufacturing method of the sofa leather comprises the following steps: (a) a leather blank is flatly paved on a passing water extruder to for waterextrusion to remove 78-96% of water in the leather blank; (b) the leather blank is dried through a drying device; (c) a repair agent is coated on the leather blank; (d) the leather blank is polishedthrough a leather polishing machine; (e) the leather blank is sized through a roller coating device; (f) paint is sprayed to the leather blank through a spraying device to obtain leather; (g) the leather is embossed or printed by two modes of knurling and plate pressing; (h) fall softening or pull softening is performed by a pull softening machine and a fall softening rotating drum; (i) the leather is ironed through high temperature to obtain finished sofa leather; and (j) the leather is measured, detected and warehoused. The manufacturing method of the sofa leather has the advantage of convenience to manufacture.

The invention relates to a production technique of xanthochromia-resisting and illumination-resisting two-layer leather, and belongs to the technical field of leather. The production technique of the xanthochromia-resisting and illumination-resisting two-layer leather includes steps of taking two-layered leathers, and orderly performing rewetting, retanning, alkali extraction, neutralizing, dyeing, fat liquoring, fixation, drying, softening, leather grinding, milling to obtain the xanthochromia-resisting and illumination-resisting two-layer leather. The xanthochromia-resisting and illumination-resisting two-layer leather has the advantages of being excellent in stretching performance, good in wear and fading resistance, good in waterproof property, and excellent in xanthochromia resistance and illumination resistance.

The invention relates to a manufacturing technology for waterproof long fur and belongs to the technical field of two-layer leather. The manufacturing technology for the waterproof long fur comprises the following steps of water returning, retanning, basification, neutralization, dyeing, color fixing, waterproofing, washing, drying, softening and milling. According to the manufacturing technology for the waterproof long fur, water returning is conducted on leather, and ammonium sulfate and a degreasing agent are added, so that impurities in the leather are effectively removed, and the cleaning effect on the leather is good; in the subsequent retanning and basification processes, the softness of the leather is effectively strengthened through step-by-step operation, so that the leather surface is plump, the leather surface fiber fineness is enhanced, a full preparation is made for subsequent dyeing, dye completely infiltrates into leather fibers, and the color fastness is high; in addition, a filler is added, so that the bursting force of the leather is strengthened; through subsequent color fixing treatment and waterproofing treatment, the color fastness is effectively strengthened, and the waterproofness is improved; later, the impurities in the color fixing process are effectively removed through washing; and then drying, softening and milling are conducted, so that the softness of the leather is improved.

The invention relates to the technical field of leather and in particular relates to a technology for producing multi-vein-mark low-grade split leather into high-grade wax leather. The technology comprises the following steps: putting vein-mark leather subjected to dyeing treatment into a baking oven and baking to obtain dried leather; putting the dried leather into a steel drum, and vibrating andmilling to obtain a milled leather blank; carrying out dull polishing on the milled leather blank for one time by utilizing 180#, 280# and 220# abrasive paper; putting the polished leather blank intothe steel drum; then vibrating and milling again for 1h, and putting into a rolling coating machine; coating wax in a rolling manner; ironing and flattening the rolling-coated leather blank by utilizing an ironing machine; putting the leather blank on a slurry spraying machine; continuously spraying for two times and putting the leather blank into the ironing machine and ironing and flattening again, so as to carry out secondary waxing on the leather blank; putting the leather blank subjected to secondary ironing and flattening into the steel drum and vibrating and milling again, so as to obtain the high-grade wax leather with a vintage feeling. The high-grade wax leather produced by the technology has the advantages of good stretching performance, wearing resistance, no easiness of de-coloring and relatively low cost.

The invention relates to an environmental-friendly ecological vehicle leather process with low total volatile organic compounds (TVOC) and low odor, and belongs to the field of vehicle leather manufacturing. The environmental-friendly ecological vehicle leather process with the low TVOC and low odor is used for processing leather according to the processes such as leather blank sorting, splitting,milling, dedusting, lining-banding, prime coating, hanging and ventilating, embossing, processing a mixing layer, hanging and ventilating, top coating, and hanging and ventilating sequentially, so that the vehicle leather with the low TVOC and low odor is obtained. According to the environmental-friendly ecological vehicle leather process with the low TVOC and low odor provided by the invention,in the formula, a water-based material with the low TVOC for coating is adopted, so that the use of an organic solvent-containing cross-linking agent and an organic solvent-containing resin is avoided; in the coating engineering, the leather is ventilated and hung, so that the volatilization of the volatile organic compounds in the leather is accelerated, a leather TVOC emission test result is remarkably superior to leather produced by a conventional production process, the odor is remarkably improved, the limit value requirements of vehicle main engine plants on the volatile organic compoundsand the odor of a vehicle interior leather material can be met, a riding environment is improved, and the harm on a human body is reduced.

The invention relates to the technical field of leather manufacturing, and provides an ecological environment-friendly vegetable tanning yellow cattle upper leather production process. According to the ecological environment-friendly vegetable tanning yellow cattle upper leather production process, an organic pre-tanning agent is used for pretreating softened leather, the tanning agent based on avegetable tanning agent is used for tanning, wherein the vegetable tanning agent is mainly a condensed vegetable tanning agent, and then an aldehyde tanning agent is combined for retanning; the vegetable tanning agent, collagen, the aldehyde tanning agent can form cross-linking to produce a vegetable-aldehyde synergistic tanning effect, the fixation effect of the vegetable tanning agent is improved to improve the absorptivity of the vegetable tanning agent, the washing resistance, organic agent resistance performance and shrinkage temperature of the obtained green leather are improved, and thedistribution of vegetable tanning agent on each layer of green leather is more uniform; and the green leather has fine grain size, good compactness, good softness, good fullness and good elasticity,and accords with the characteristics of upper leather products.

The present invention is a method and system for processing animal hides in a meat processing facility. In one embodiment, the system the system includes a grading station for determining hide grades, a measuring station for determining at least one hide dimension of the animal hide, a hide folding station, a stacking station adapted to deposit hides at a plurality of stacking sites, a conveyor system and a control system.

The invention discloses a preparation process for sofa leather. According to the preparation process, a series of processes of curing, soaking, fleshing, degreasing, depilating, tanning, acid-alkali treatment, extrusion flattening, drying and milling, dyeing, coating and embossing are adopted, so that fur is made into a sofa leather body; curing of the fur is used for killing microorganisms and bacteria on the surface of the fur, so that the fur is guaranteed to be prevented from going bad in the processing process; soaking of the fur is used for enabling the fur to regain water lost in the curing process; a hair removal enzyme inhibitor is utilized to prevent the hair removal enzyme from damaging a fur body during the hair removal process; the substance state of the sofa leather is adjusted by means of acid-alkali treatment, so that the sofa leather is better colored; and the preparation process has the advantages that the process is strictly controlled, industrial production can be realized, the fur is guaranteed to be prevented from going bad in the fur processing process, resource waste is avoided, cost is saved, preparation time of the sofa leather is shortened, and the factory income is improved.

The invention relates to a kind of planar waxy split leather and a manufacturing method thereof and belongs to the technical field of leathers. The manufacturing method of the planar waxy split leather comprises the following steps of selecting a split leather subjected to processing and dyeing treatment, conducting primary drying, vibration softening, primary leather buffing, roll coating, primary knurling, secondary leather buffing, water wax spraying, secondary drying, water wax rolling, tertiary drying, dye spraying and secondary knurling, and then obtaining the planar waxy split leather. The planar waxy split leather has good color fastness good water repellency and wet-dry friction resistance and is soft in hand feel and free of oily feel.

The invention relates to blood-vein-exposure-proof double-layer suede and a manufacturing method thereof and belongs to the technical field of leather manufacturing. The manufacturing method of the vein-exposure-proof double-layer suede comprises the following steps: rewetting; retanning; neutralizing; filling; dyeing; grease feeding; acid immobilizing; drying; hanging and airing; softening in a vibrating way; leather grinding; and milling. According to the manufacturing method provided by the invention, a manufacturing technique and used chemical materials are improved so that the phenomenonof exposure of blood veins at the bottom surface of the leather is effectively prevented, and the leather yield is increased. Meanwhile, liquid chemical materials used in all steps are relatively goodin water solubility and good in environmental friendliness; and the manufacturing method provided by the invention is mild in condition, convenient to operate and suitable for being popularized and applied to the field of leather manufacturing.

The invention discloses a tan sheep fur tanning treatment process, comprising branching, cleaning, fur soaking, fleshing, enzyme dipping, secondary fleshing, acid dipping and enzyme softening, aldehyde tanning, neutralizing, airing, dry shoveling, fur grinding and toggling molding; during fur soaking, mixed liquid of formaldehyde and water is used for soaking furs; the weight ratio of water to formaldehyde is 580-650: 1; in the enzyme dipping process, the weight ratio of water to water dipping enzyme is 1800-2200: 1; after tan sheep furs are neutralized, the airing is performed; the dry shoveling and the bur grinding are performed for the tan sheep furs by mechanical equipment; and the toggling molding is performed after dry grinding and fur grinding. Tan sheep bur boards tanned by the process are still soft, are bright in color, and are free of influencing the hair dying. The subcutaneous tissues of tan sheep furs are further destroyed through two times of fleshing to create conditions for subsequent enzyme softening and neutralizing process; and the process makes up the hair removing phenomenon caused by cancel of nitre dipping, shortens the tanning period, and achieves the purposes of energy conservation and consumption reduction.

The invention discloses a production method of shrunk grain leather. According to the production method disclosed by the invention, a whole skinned animal skin material is used as a raw material, water immersion is carried out, fleshing operation can be respectively carried out after each immersion, and unhairing and swelling can be carried out after second immersion and before the fleshing operation; hide fiber is opened as possible starting from blue skin, big neutralization is adopted during a retanning stage, moderate filling is carried out, the using amount of vegetable tannin is increased, the loose degree of the hide fiber is enlarged as far as possible by a wet toggling plate, crust is subjected to re-embossing, rewetting can be carried out after patterns are sized through millingby a drum, temperature-controlled and humidity-controlled milling can be carried out by using a temperature-controlled stainless steel drum, the humidity of the crust is controlled by utilizing an alternate cooling and heating method, and leather patterns are shrunk, so that uniform and consistent shrunk grain leather can be produced.