428results about "Leather surface finishing" patented technology

The invention provides a leather product and a method for manufacturing the leather product. The leather article comprises a substrate and a coating comprising a cellulose derivative with improved color fastness to rubbing, the cellulose derivative may be methylcellulose, ethylcellulose, ethylmethylcellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl methylcellulose, hydroxypropyl methylcellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, or carboxymethyl cellulose. The cellulose acetate-cellulose acetate composite material is prepared from ethyl hydroxyethyl cellulose, cellulose acetate, cellulose triacetate, cellulose propionate, cellulose acetate propionate, cellulose acetate butyrate, microcrystalline cellulose, cellulose nitrate or cellulose sulfate.

The invention belongs to the technical field of polyurethane coatings and coatings, and particularly relates to an anti-doodling polyurethane coating, a coating as well as a preparation method and application of the anti-doodling polyurethane coating, and the anti-doodling polyurethane coating comprises the following components in parts by weight: 15-30 parts of dimercaptomercaptan, 5-30 parts of polymercaptan, 0.20-0.6 part of a catalyst and 20-55 parts of isocyanate. The molecular weight of the dimercapto mercaptan is 154.32; and the molecular weight of the polymercaptan is 260.53. Polyurethane is prepared through reaction of dimercaptomercaptan, polymercaptan and isocyanate, the adhesion performance and anti-doodling performance of polyurethane on the surface of synthetic leather / leather are remarkably improved, industrial production is easy, and wide application prospects and market value are achieved.

The invention provides a preparation method of solvent-free lignin modified waterborne polyurethane, which comprises the following steps: mixing isocyanate, polyol and lignosulfonate alcohol liquefied product, and reacting to obtain a prepolymer; and dispersing the prepolymer in water, and carrying out a post-chain extension reaction with a post-chain extender to obtain the solvent-free lignin modified waterborne polyurethane. The lignosulfonate alcohol liquefied product has high compatibility with polyhydric alcohols and isocyanate, so that the lignosulfonate alcohol liquefied product directly participates in a polymerization reaction without using a solvent to dissolve lignin in the later period, thereby improving the environmental protection property and reducing the cost. The degree of functionality of a lignin reactive group in the lignosulfonate alcohol liquefied product is greater than 2, and a waterborne polyurethane product is of a cross-linked structure after reaction, so that the mechanical properties and the like of the product are greatly improved, and the application in the fields of leather finishing and the like is further facilitated.

The invention discloses a preparation method of a bionic patterned biomass-based photoluminescence polyurethane coating for leather. The preparation method specifically comprises the following steps: step 1, preparing a zirconium hydrogen phosphate crosslinking body dispersion liquid; step 2, preparing a bionic patterned biomass-based photoluminescence polyurethane emulsion for leather according to a product obtained in the step 1; and step 3, preparing the bionic patterned biomass-based photoluminescence polyurethane coating for leather according to the product obtained in the step 2. The invention further discloses a bionic patterned biomass-based photoluminescence polyurethane coating for leather, and the prepared polyurethane coating has a better pattern display function and can be applied to leather finishing and anti-counterfeiting.

The invention belongs to the technical field of leather treatment, and particularly relates to a waterproof breathable coating for leather and a preparation method thereof.According to the waterproof breathable coating for the leather and the preparation method thereof, siloxane modified acrylate copolymer and functional nano filler are introduced, good flexibility and mechanical strength can still be kept in a low-temperature environment, and it is ensured that a coating cannot become brittle or crack due to temperature reduction; besides, the freezing point of the system is effectively reduced due to the existence of the anti-freezing agent, the material is prevented from being frozen at a low temperature, and meanwhile, good film-forming property and softness of the coating under a low-temperature condition are ensured due to the combined action of the coalescing agent and the plasticizer; finally, the waterproof and breathable laminated glue for the leather provided by the invention not only can provide excellent waterproof and breathable properties at normal temperature, but also can maintain stable physicochemical properties under extremely cold conditions, so that the service life of a leather product is greatly prolonged, and the application range of the leather product is widened.

The invention discloses a wear-resistant coating and application thereof on a leather surface, and belongs to the technical field of leather finishing. The coating comprises a functionalized polyurethane-acrylate composite emulsion, a photoinitiator, an auxiliary agent and deionized water. Wherein the composite emulsion is prepared from hyperbranched polyester polyol, a dynamic bond chain extender and the like through prepolymerization, fluorine-containing grafting and in-situ sol-gel reaction, a hyperbranched skeleton provides mechanical support, double dynamic bonds endow a self-repairing function, in-situ nano-compounding enhances wear resistance, a diurea hydrogen bond enhances binding force, and a fluorine-containing side chain endows a coating with hydrophobic and stain-resistant performance; and preparing the coating by matching with a gradient curing process. The coating prepared by the invention has high wear resistance, efficient self-repairing property, firm adhesive force, excellent stain resistance and leather adaptation flexibility, and meets the actual requirements of middle and high-end leather finishing.

The invention relates to the technical field of finishing agents, and discloses a fluoride-free leather water-repellent finishing agent and a preparation process thereof. The preparation method comprises the following steps: reacting hydrogen-containing silicone oil, N-methylallylamino hydroxypropyl alkane and a bromoalkane monomer to obtain hydroxyl quaternary ammonium salt silicone oil; the fluorine-free leather water-repellent finishing agent contains hydrophobic silicone oil and a plurality of alkyl long carbon chains, and the hydrophobic silicone oil and the alkyl long carbon chains are introduced into a polyurethane molecular chain through a polymerization chain extension reaction, so that the hydrophobic and water-repellent properties of the polyurethane finishing agent and the leather are remarkably improved, and the water-repellent property of the leather is improved. And the hydroxyl quaternary ammonium salt silicone oil contains an organosilane quaternary ammonium salt antibacterial group which is introduced into a polyurethane molecular chain, so that the finishing agent and the leather are endowed with excellent antibacterial performance.

The invention relates to a preparation method of leather with a multi-antibacterial type long-acting antibacterial function. The preparation method comprises the following steps of wet blue leather pretreatment, antibacterial retanning, filling dyeing, fat liquoring, antibacterial treatment, drying finishing and antibacterial coating. Wherein the antibacterial retanning adopts eucalyptus oil / dialdehyde cyclodextrin as an aldehyde retanning agent for aldehyde retanning; in the antibacterial treatment, eucalyptus oil and beta-cyclodextrin are used as antibacterial agents to carry out antibacterial occurrence treatment, the eucalyptus oil and the beta-cyclodextrin take essential oil extracted from natural herbaceous plant eucalyptus leaves as clathrate compounds, the beta-cyclodextrin is used as a main body, and a modified antibacterial agent beta-cyclodextrin and eucalyptus oil clathrate compound is prepared through a molecular clathration technology. As an antibacterial agent, an occurrence process is designed for antibacterial treatment; the antibacterial coating adopts a coating containing silver ions to be applied to a leather coating process; through triple antibiosis, the leather is more durable in antibiosis performance and more efficient.

The invention relates to the technical field of leather shoe manufacturing, and discloses an anti-oxidation vamp leather shoe and a production process thereof.The production process includes the steps that nappa vamp leather is taken and subjected to surface cleaning for standby application; the surface of the cleaned nappa vamp leather is coated with an antioxidant 1135, acrylic resin and sulfur modified benzoxazine, then drying is conducted, and the leather shoes with the antioxidant vamps are obtained. A benzoxazine structure in sulfur-modified benzoxazine can form a heat-resistant phenolic resin structure at a high temperature and has a good flame-retardant effect, meanwhile, a triazine base body also has a good flame-retardant property, and the sulfur element, the boron element and the nitrogen element contained in the triazine base all have good flame-retardant effects and jointly form a flame-retardant system, so that the flame-retardant effect is good. And after a chlorine group in the chlorine-containing triazinyl benzoxazine reacts with a hydroxyl group in allyl alcohol, the substitution degree of alkenyl is improved, the substitution degree of sulfur is further improved, and the flame-retardant effect is better.

The invention provides high-strength waterproof flame-retardant clothing leather and a preparation method thereof.The method comprises the steps that a sheepskin raw material is obtained, degreasing treatment is conducted on the sheepskin raw material through a degreasing agent, liming treatment is conducted on the sheepskin raw material subjected to degreasing treatment through liming liquid, and a first leather semi-finished product is obtained; performing basic tanning treatment on the first leather semi-finished product by adopting a target chrome-free tanning agent to obtain a second leather semi-finished product; carrying out retanning treatment on the second leather semi-finished product by adopting a target retanning agent to obtain a third leather semi-finished product; performing post-treatment on the third leather semi-finished product to obtain a fourth leather semi-finished product; the fourth leather semi-finished product is subjected to coating spraying treatment, a waterproof layer, a flame-retardant layer and a modification layer are formed on the surface of the fourth leather semi-finished product, a fifth leather semi-finished product is obtained, and the fifth leather semi-finished product is subjected to soft finishing, so that the high-strength waterproof flame-retardant clothing leather finished product is obtained. The waterproof and flame-retardant effects are good, and the cost is low.

The invention provides a preparation method of a self-repairing waterborne polyurethane leather coating material containing a polyurethane colloid capsule, which comprises the following steps: firstly, preparing an O / W type Pickering emulsion by taking modified SiO2 nanoparticles as a stabilizer and a polyurethane solution as an oil phase; the preparation method comprises the following steps: firstly, taking the polyurethane colloid capsule as a template, forming the colloid capsule capable of being dispersed in a water system through a sol-gel reaction, and finally, uniformly dispersing the colloid capsule into a waterborne polyurethane leather finishing emulsion to prepare the waterborne polyurethane leather self-repairing coating material containing the polyurethane colloid capsule. According to the invention, the polyurethane healing agent is used as a core material, and the modified SiO2 nanoparticles are used as a shell wall, so that the prepared spherical colloid capsule is high in encapsulation efficiency and strong in stability. According to the preparation method provided by the invention, the problems of poor self-repairing performance and mechanical property caused by low compatibility of a healing agent and a polyurethane matrix for leather finishing and easy agglomeration of a traditional microcapsule in a waterborne polyurethane emulsion in a traditional external aid type self-repairing polyurethane coating are solved; and the wear resistance of the leather polyurethane coating is remarkably improved by introducing SiO2.

The application discloses a kind of leathers with conductive gradient structure and its preparation method and application, the method is by ultrasonic and physical mechanical action, makes hydrotalcite, carbon black, polypyrrole etc. Conductive material enters the inside of leather collagen fiber, the modification of collagen fiber of leather is carried out.The preparation method provided by the application can increase the porosity of leather fiber structure, facilitate multiple reflection of electromagnetic wave in leather inside;Meanwhile, conductive material constructs conductive network in the inside of collagen fiber, and the leather with conductive gradient structure is prepared, which is conducive to enhancing the absorption loss of electromagnetic wave by conductive material.The electromagnetic shielding leather prepared by the preparation method provided by the application has a shrinkage temperature of 77 DEG C and an electromagnetic shielding effectiveness of 45 dB, indicating that the leather has good thermal stability and electromagnetic shielding performance.

The application belongs to the field of leather auxiliaries, and particularly relates to a kind of anti-stain, sound-damping and touch agent for leather and a preparation method thereof. The preparation method comprises the following steps: mixing double allyl polyether, allyl methacrylate, a catalyst and hydrogen-terminated polydimethylmethylhydrogen siloxane, then heating and reacting to obtain an intermediate; mixing the intermediate with isomeric tridecanol polyoxyethylene ether 1305 and isomeric tridecanol polyoxyethylene ether 1307, then heating, stirring and dispersing, and adding deionized water to continue stirring and dispersing. The anti-stain, sound-damping and touch agent for leather does not contain fluorine in the structure, so it is not limited in use due to the fluorine ban. In addition, different from conventional hyperbranched, the present application adopts silicon-hydrogen addition hyperbranched, which is more flexible in structure design, has a larger silicon crosslinking density, can achieve better anti-stain and sound-damping effects, and can improve the physical properties of the finishing system. The touch of the anti-stain, sound-damping and touch agent for leather can be adjusted to a large extent, and it is more widely applicable.

The invention relates to the technical field of leather auxiliaries, and discloses a modified negative oxygen ion leather finishing agent and a preparation method thereof.The modified negative oxygen ion leather finishing agent is obtained by adding negative oxygen ion nanometer liquid, modified polyurethane, epoxy chitosan, polyethylene glycol and water into a stirrer and stirring. In the stirring process, a terminal hydroxyl group in the modified polyurethane and an epoxy group in the epoxy group chitosan are subjected to a ring-opening reaction and are cross-linked with each other, and a stable molecular contact network is formed and is better adsorbed on the surface of leather, so that the leather finishing agent is better adsorbed on the surface of the leather. The sulfur element and the phosphorus element in the modified polyurethane have better flame-retardant effects, and form a flame-retardant system together with a chitosan molecular structure in the epoxy chitosan. Chitosan and quaternary ammonium salt in the epoxy chitosan have a relatively good antibacterial effect.

A textile treatment emulsion formulation includes a silicone-(meth)acrylate copolymer, a surfactant, water and a blocked isocyanate and method for its preparation are disclosed. The textile treatment emulsion may be used in a method including coating the emulsion formulation on a textile and heating the textile to dry the emulsion formulation. This method renders the textile oil repellent.

The present invention relates to the technical field of leather finishing agents, specifically a wear-resistant and scratch-resistant leather finishing agent and a preparation method thereof. The present invention first uses succinic anhydride and diethanolamine as raw materials to react and prepare an intermediate, reacts the intermediate with 1,2-epoxy-7-octene to obtain a dihydroxy crosslinking monomer; then the dihydroxy crosslinking monomer, chitosan quaternary ammonium salt, acrylic acid, butyl acrylate, and methyl methacrylate are mixed, and polymerized under the action of an initiator to obtain a chitosan quaternary ammonium salt-based acrylate emulsion; then the chitosan quaternary ammonium salt-based acrylate emulsion is added to a polyurethane prepolymer to prepare a modified polyurethane; finally, the modified polyurethane, carboxylated modified graphene oxide, a defoamer, a thickener, and a wetting agent are mixed to obtain a leather finishing agent. The leather finishing agent prepared by the present invention has good film-forming performance and has antibacterial, wear-resistant, scratch-resistant, water-washable and other properties.

The invention provides an environment-friendly high-physical-property brightener for automobile seat leather and a preparation method of the environment-friendly high-physical-property brightener. The preparation method comprises the following steps: a) dehydrating dihydric alcohol, mixing the dehydrated dihydric alcohol with isocyanate, carrying out a first reaction, adding a hydrophilic chain extender and a small molecule chain extender, carrying out a second reaction, adding a catalyst and acetone, and carrying out a third reaction to obtain a reaction mixture; and b) neutralizing the reaction mixture obtained in the step a), adding water for dispersion, then adding an amine chain extender for mixing, and finally removing acetone in vacuum to obtain the environment-friendly high-physical-property brightener for the automobile seat leather. Compared with the prior art, the preparation method provided by the invention has the advantages that specific raw materials are adopted and matched with specific process steps, overall better interaction is realized, and the obtained product has excellent comprehensive physical properties and excellent bending resistance, contains extremely low solvent and meets the green and environment-friendly requirements of automobile seat cushion leather.

The invention discloses a textile treatment emulsion preparation containing a silicone-(methyl) acrylate copolymer, a surfactant, water and blocked isocyanate and a preparation method of the textile treatment emulsion preparation. The textile treatment emulsion can be used in a process that includes coating the emulsion formulation on a textile and heating the textile to dry the emulsion formulation. According to the method, the textile has oil repellency.

The utility model discloses a device capable of improving the degree of dyeing of leather dyestuff, which comprises a machine body supporting shell, a dyeing cylinder arranged on the right side of the machine body supporting shell, a first positioning strip arranged on the outer side of the dyeing cylinder, a supporting plate arranged on the rear side of the machine body supporting shell, a power line connected to the rear side of the supporting plate, and a power line connected to the power line. A heating pipe is arranged at the front end of the supporting plate. According to the device capable of improving the dyeing rate of the leather dye, the dye can be conveniently heated in the using process, so that the molecular activity of the dye is not easily influenced by the temperature, the efficiency of the dye permeating into leather fibers is improved, and the dyeing efficiency of the dye is prevented from being influenced; meanwhile, after use, the processing raw materials can be hung and aired conveniently, so that leather is not prone to carrying a large amount of undried dye liquid to be discharged outwards, the use consumption of dye is reduced, the operation cost of the device is reduced, and a better use effect is achieved.

The utility model relates to the technical field of leather processing equipment, in particular to leather auxiliary sizing equipment. According to the technical scheme, the leather sizing device comprises a sliding table rail and further comprises a sliding mechanism which is installed on the sliding table rail and used for moving left and right for sizing after leather is placed on the sliding table rail. According to the leather sizing device, the structures such as the sliding mechanism, the extruding mechanism, the driving mechanism and the brush mechanism are matched, leather only needs to be placed on the sizing operation table to be fixed, then the first motor and the second motor are started in sequence, the leather sizing device can achieve automatic operation, and compared with a traditional manual sizing mode, the leather sizing device is convenient to operate. And manpower and time cost are saved. In addition, the equipment can also uniformly smear slurry, so that the quality of leather products is more stable, and the product quality difference caused by uneven manual operation is reduced. In addition, after the leather sizing equipment is used, a worker does not need to carry out repeated operation with high physical output, and the labor intensity is reduced.

The invention belongs to the field of leather auxiliaries, and particularly relates to an antifouling and silencing hand feeling agent for leather and a preparation method. The preparation method comprises the following steps: mixing diallyl polyether, allyl methacrylate, a catalyst and hydrogen-terminated polydimethylmethylhydrosiloxane, and then heating for reaction to obtain an intermediate; and mixing the intermediate with iso-tridecanol polyoxyethylene ether 1305 and iso-tridecanol polyoxyethylene ether 1307, heating, stirring and dispersing, adding deionized water, and continuously stirring and dispersing. The structure of the antifouling and silencing hand feeling agent for leather does not contain fluorine, so that the use is not limited due to fluorine forbidding; besides, different from conventional hyperbranched polymerization, hydrosilylation hyperbranched polymerization is adopted in the scheme, so that the structural design is more flexible, the silicon crosslinking density is higher, better antifouling and silencing effects can be achieved, and the physical property of a coating system can be improved; the antifouling and silencing hand feeling agent for the leather is relatively high in hand feeling adjustment degree and relatively wide in application range.

The application discloses a wear-resistant coating and application thereof to a leather surface, and belongs to the technical field of leather finishing. The coating comprises a functional polyurethane-acrylate composite emulsion, a photoinitiator, an additive and deionized water. The composite emulsion is prepared through pre-polymerization, fluorine-containing grafting and in-situ sol-gel reaction of hyperbranched polyester polyol, dynamic bond chain extender and the like. The hyperbranched skeleton provides mechanical support, the double dynamic bonds endow the coating with self-repairing function, in-situ nano-composite enhances wear resistance, the double urea hydrogen bonds strengthen the bonding force, and the fluorine-containing side chains endow the coating with hydrophobic and stain-resistant properties. The coating is prepared by matching a gradient curing process. The coating prepared by the application has high wear resistance, efficient self-repairing property, firm adhesion, excellent stain resistance and leather-adaptive flexibility, and meets the actual needs of medium and high-end leather finishing.

The invention discloses a method for making gray cowhide, which comprises: 1. selecting raw cowhide; 2. soaking and disinfecting with medicine solution; 3. removing hair and rotten flesh after washing; 4. scraping oil on the shelf; 5. putting ash on the shelf; 6. rinsing and scraping off residual ash and grease; 7. soaking and softening after washing; 8. soaking and repeatedly pushing with softener after drying on the shelf, and repeatedly grinding after unshelf; 9. repeatedly grinding and polishing; 10. applying oil while wet after washing and letting to penetrate to obtain gray cowhide. The invention soaks and softens the cowhide with tanning and softening liquid containing mirabilite, cinnabar and borax, so that the collagen fibers in the cowhide are softened and loosened and maintain a complete three-dimensional structure, so that the color of the product gray cowhide is white and the transparency is high, and the flexibility of the gray cowhide is greatly improved. The obtained gray cowhide is light, soft, translucent, and milky white in appearance, and the leather board is uniform in thickness, hard and tough, which is suitable for making high-end shadow puppets.

The disclosure provides leather articles and a method for making leather articles comprising a substrate and a coating comprising a cellulose derivative having improved colorfastness to rubbing. The cellulose derivative may be methyl cellulose, ethyl cellulose, ethyl methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose, ethyl hydroxyethyl cellulose, cellulose acetate, cellulose triacetate, cellulose propionate, cellulose acetate propionate, cellulose acetate butyrate, microcrystalline cellulose, cellulose nitrate, or cellulose sulfate.

The invention relates to the field of leather, in particular to antifouling and scratch-resistant leather and a preparation method thereof, and aims to solve the problems that the attractiveness and the service life of the surface of the leather are seriously influenced due to poor antifouling property and scratch resistance of the conventional natural leather. According to the preparation method, polyether polyol and diisocyanate react to form polyurethane, the polyurethane can be uniformly attached to the surface of the natural cow leather to form a protective layer, the surface of the natural cow leather is well protected, after an epoxy fluorine-containing compound is added, the stain resistance of the protective layer can be remarkably improved, meanwhile, the lubricating property of the protective layer is improved, and the service life of the natural cow leather is prolonged. According to the present invention, the anti-fouling performance and the anti-scraping performance are improved, the hardness and the wear resistance of the protection layer can be significantly improved after the multi-amino modified anti-scraping particles are added so as to further improve the anti-scraping performance, and the finally prepared leather has advantages of excellent anti-fouling performance and excellent anti-scraping performance so as to improve the aesthetic degree and the durability of the leather surface.

The invention relates to the technical field of essences, in particular to a high-temperature-resistant long-lasting slow-release double-layer microcapsule powder essence and a preparation method thereof.The high-temperature-resistant long-lasting slow-release double-layer microcapsule powder essence comprises a core material and a wall material wrapping the core material, the wall material accounts for 75-90 wt%, and the core material accounts for 10-25 wt%; the core material comprises the following raw materials in parts by weight: an oil phase: 25-35 parts of oily essence and 0.5-6 parts of diisocyanate; a water phase: 10-20 parts of a surfactant, 2-6 parts of amino resin, 0.1-2 parts of a pH regulator and 44.6-84 parts of deionized water; the wall material comprises a starch derivative. The double-layer microcapsule powder essence is formed by coating the oily essence in a double-layer manner, the volatile oily essence is protected in a double-layer manner, the fragrance retention time of the essence is greatly prolonged, and on the other hand, the double-layer microcapsule powder essence has the effect of resisting high temperature and high pressure, can slowly release fragrance for a long time, and is safe and reliable. The problems that essence is easy to volatilize, not resistant to high temperature and not easy to use in a leather perfuming scene are solved.

The invention discloses an anti-aging water-based paint suitable for a leather surface, and belongs to the technical field of coatings. The anti-aging water-based paint is composed of a component A, a component B, a free radical trapping agent, a flatting agent and a defoaming agent, the component A is an acrylate copolymer emulsion containing a weather-resistant functional monomer, and the component B is a silane-terminated water-based polyurethane emulsion. The weather-resistant functional monomer is synthesized through three-step reaction and integrates ultraviolet absorption, light energy conversion and crosslinking functions; the component A is prepared through pre-emulsification semi-continuous seed polymerization, the component B is prepared through pre-polymerization, hydrophilic chain extension, silane end capping and emulsification, the component A and the component B are hybridized in proportion, then an auxiliary agent is added, and pH and viscosity are adjusted to obtain a finished product. According to the invention, a complete anti-aging protection system is constructed, has excellent adhesive force, flexibility and friction resistance, is adaptive to leather working conditions, has low VOC content, can avoid yellowing and shedding of a coating, and prolongs the service life of leather products.

The invention belongs to the technical field of fine chemical engineering and leather chemicals, and particularly relates to amide wax for self-emulsifying leather as well as a preparation method and application of the amide wax. The preparation method comprises the following steps: mixing a long-chain hydrophobic compound, an amino-containing compound and a metal catalyst, heating, and reacting to obtain a first reaction system; adding hydrophilic polyether and an organic acid catalyst into the first reaction system, heating and reacting to obtain a second reaction system; and vacuumizing the second reaction system to remove residual small molecules and low-boiling-point substances, and cooling to obtain the amide wax for the self-emulsifying leather. The self-emulsifying amide wax for leather has an amphiphilic structure, and can be self-dispersed in hot water to form a stable emulsion without adding an emulsifier. The finishing agent can be anchored with a metal cross-linking agent, endows leather with lasting smooth hand feeling, high fullness and excellent waterproofness, is suitable for finishing a top layer or a middle layer of the leather, and is convenient to apply and environment-friendly.

The invention relates to the field of leather processing, in particular to leather dip-dyeing equipment, a dip-dyeing method and a storage medium thereof.The leather dip-dyeing equipment comprises a dip-dyeing base, a dip-dyeing pool used for dip-dyeing leather is formed in the dip-dyeing base, and a plurality of partition plates used for bearing the leather are arranged on the inner wall of the dip-dyeing pool; the dip dyeing base is provided with a plurality of partition plates, the partition plates are distributed in the depth direction of the dip dyeing pool, a guide plate is rotationally arranged on the dip dyeing base, a conveying piece used for conveying leather into the dip dyeing pool is arranged on the dip dyeing base, and the guide plate rotates to communicate the leather conveyed on the conveying piece with the different partition plates; a conveying assembly used for conveying the leather out is arranged on the partition plate. The leather dip dyeing device has the effect of improving the leather dip dyeing efficiency.