77results about "Leather impregnation" patented technology

Compositions and methods for use provide enhanced surface modification in leather care. In particular, the present disclosure is directed to water-based compositions including a silicone emulsion that delivers cleaning, protective, and preservative qualities.

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.

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 invention discloses a leather-based polyvinyl alcohol / quercetin-silver / MXene flexible composite material, a preparation method and application, and belongs to the technical field of intelligent leather products and flexible wearable devices, the method comprises the following steps: dissolving silver nitrate and quercetin according to a mass ratio of (0.29-0.54): (0.88-1.75), adjusting the pH value to 7.0-7.3, then carrying out heat preservation treatment, washing and drying the obtained precipitate, and thus obtaining the leather-based polyvinyl alcohol / quercetin-silver / MXene flexible composite material. The quercetin-silver nanoparticles are obtained; the method comprises the following steps: sequentially infiltrating an aqueous dispersion of quercetin-silver nanoparticles, an aqueous dispersion of MXene and a polyvinyl alcohol aqueous solution into leather, then carrying out circulating freeze thawing and unfreezing to obtain modified leather, soaking the modified leather in a mixed aqueous solution of sodium chloride and polyol, and then drying to obtain the quercetin-silver nanoparticle leather. The leather-based polyvinyl alcohol / quercetin-silver / MXene flexible composite material can be applied to flexible wearable products and antibiosis.

The present invention relates to a method for antimicrobial protection applied to hides in the tanning process incorporating a biocidal composition and an additive allowing the Identification of its presence by means of a luminescent effect, as well as certifying its originality using luminescence encryption techniques, wherein the composition is added in the tanning process immediately after adding the chromium or titanium salts and in an amount between 0.1 % and 5 % by weight of the material to be tanned and comprises: silver phosphate glass between 3 % and 5 %; silicone in an amount between 1 % and 3.5 %; aliphatic hydrocarbons between 0.1 % and 0.30 %; and water between 90 % and 95 %, and the luminescent additive is added in an amount between 0.1 % and 5 % by weight of the material to be tanned and comprises between 20 % and 40 % silica; alumina in a proportion between 10 % and 30 %; calcium fluoride between 30 % and 50 %; erbium (III) fluoride between 0.5 % and 3 %; ytterbium (III) fluoride between 5 % and 15 %; thulium (III) fluoride in a maximum amount of 5 %; and europium (III) fluoride in a maximum amount of 5 %, with respect to the total weight of the luminescent additive.

The present application relates to the leather processing technical field, specifically to a kind of processing technology for improving leather luggage easy to crack, comprising the following steps: S1: selecting raw leather, preliminary treatment is carried out to remove surface impurities, and adjust moisture content;S2: the leather after S1 processing is soaked in natural plant oil solution;S3: the leather after soaking is treated with sound wave;S4: heat pressing treatment is carried out, and the gap between leather fibers is sealed;S5: the leather after heat pressing treatment is cooled and cured;S6: using nanoscale filler, the leather after curing is filled;S7: the leather after filling is treated with final surface coating, and protective layer is formed.The present application, by comprehensive treatment method, significantly improves the flexibility, waterproofness, pressure resistance and crack resistance of leather, while using environmentally friendly materials to optimize cost, effectively prolongs the service life of leather products and reduces environmental impact.

The invention discloses a leather synchronous tanning, printing and dyeing method based on environment-friendly bio-based dye, relates to the technical field of leather processing, is particularly suitable for production of clothing leather, and comprises the steps of leather blank pretreatment, preparation of environment-friendly bio-based dye tanning treatment liquid, synchronous tanning, printing and dyeing and post-treatment. According to the method, two independent procedures of traditional tanning and dyeing are combined into a whole, so that the production period is greatly shortened, equipment occupation, water consumption, energy consumption and labor cost are reduced, and the production efficiency is improved; in the whole process chain, the use of a chrome tanning agent is avoided, the pollution risk of toxic and harmful substances such as heavy metal chromium is eliminated from the source, and the load of wastewater treatment and the impact on the environment are greatly reduced. The method is not only suitable for common cowhide, sheepskin and the like, but also suitable for high-grade clothing leather, soft leather and other leather types with high hand feeling requirements due to mild treatment conditions and effective protection on collagenous fibers.

The invention relates to the technical field of leather manufacturing, in particular to a preparation method of light-transmitting leather. The preparation method provided by the invention comprises the following steps: after a chrome-free tanned leather blank is infiltrated in a transparent treatment solution, the free transparent treatment solution is squeezed out, and then drying is performed to obtain the light-transmitting leather, and the shrinkage temperature of the chrome-free tanned leather blank is 75-99 DEG C; the transparentizing treatment liquid is composed of an eutectic solvent and water, and the mass ratio of the eutectic solvent to the water is 1: (0.2-10). The light-transmitting leather obtained through the method is good in light transmission and excellent in softness, and the hand feeling of genuine leather is kept.

The invention relates to a preparation method of low-cytotoxicity ecological leather based on all-natural materials. Comprising the following steps of batch grouping, pre-soaking, fleshing and trimming, main soaking, fleshing and trimming, enzyme unhairing, liming, splitting and trimming, deliming, softening, pickling, tanning by combining tara tannin extract, tea polyphenol and zeolite, wringing, shaving and buffing, rewetting, primary neutralizing, fat liquoring, drying and finishing, and finishing. According to the tanning method, a tanning agent can be better combined with leather fibers by adopting a tanning extract-tea polyphenol-zeolite combined tanning method, so that the shrinkage temperature and the damp-heat resistance stability of the leather are improved, and the strength and the wear resistance of the leather are enhanced. Meanwhile, the tea polyphenol has the effects of resisting oxidation, resisting bacteria and the like, the aging resistance and the antibacterial performance of the leather can be improved, and the service life of the leather is prolonged.

Disclosed are a fabric treatment emulsion formulation comprising a silicone-(meth)acrylate copolymer, a surfactant, water, and a blocked isocyanate, as well as a method for preparing the same. The fabric treatment emulsion may be used in a method comprising coating a fabric with the emulsion formulation and heating the fabric to dry the emulsion formulation. This method makes the fabric oil-repellent.

The invention relates to a preparation method of high-comfort ecological leather based on all-natural materials. Comprising the following steps of batch grouping, pre-soaking, fleshing and trimming, main soaking, fleshing and trimming, enzyme unhairing, liming, splitting and trimming, deliming, softening, pickling, tanning in a tara tannin extract-tea polyphenol polymer (tea pigment)-zeolite combination, wringing, shaving and buffing, rewetting and filling, fat liquoring and finishing. By adding natural and modified fatliquoring agents such as the sulfated tea oil, the sulfated cattle hoof oil and the lecithin fatliquoring agent, as well as the natural dye and the filler, the leather can obtain good softness, full hand feeling and good comfort.

The application discloses a yellowing-resistant leather fatliquoring agent taking modified sulfonated oil as a main agent and a preparation method thereof. The leather fatliquoring agent comprises the following components in mass percentage: 30-50% of modified sulfonated oil, 1-5% of ethoxylated alkyl phosphate CEP, 10-20% of coal-based AOS, 1-3% of fatliquoring auxiliary, and 30-50% of water. The leather fatliquoring agent provided by the application has low cost, the modified sulfonated oil as the main agent is introduced with an EO group, the addition of ethylene oxide reduces the raw material cost, and the coal-based AOS has low price. The product has good yellowing resistance. The introduction of the EO group increases the molecular weight of the main agent sulfonated oil, thereby reducing the active groups in the fatliquoring agent under the same addition amount, and the fatliquoring agent is endowed with good yellowing resistance. The product can significantly improve the mechanical strength and softness of a leather product.

The invention relates to the technical field of electronic skin, in particular to skin-friendly leather for electronic skin and a preparation method thereof.The preparation method of the skin-friendly leather for electronic skin comprises the steps that (1) natural leather is sequentially subjected to deliming liquid soaking, softening enzyme liquid softening treatment and ionic liquid tanning liquid tanning, then washed to be neutral, freeze-dried and then ground to remove an epidermal layer, and the skin-friendly leather for electronic skin is obtained; a collagenous fiber net-shaped substrate is obtained; (2) adding a skin-friendly modifier into deionized water, carrying out ultrasonic dispersion, then adding a conductive component, and continuously carrying out ultrasonic dispersion to obtain a modified solution; and (3) immersing the collagenous fiber net-shaped substrate into the modification liquid, carrying out immersion treatment, draining water, carrying out hot-pressing shaping, and cooling to obtain the skin-friendly leather for the electronic skin. The skin-friendly leather for the electronic skin is excellent in comprehensive performance and has excellent skin-friendly softness, ventilation comfort, stable conductivity and long-acting antibacterial property, and reliable material support is provided for application of the electronic skin in the fields of medical monitoring, intelligent wearing and the like.

The present invention provides a method for using a retanning composition containing rice husk in leather processing, the retanning composition providing good retanning behavior.

This invention relates to the field of crystal materials technology, specifically disclosing a wear-resistant and antibacterial composite leather for electronic skin and its preparation method. The composite leather is composed of delimed bare leather, plant polyphenols, glutaraldehyde, lysine-chitosan graft polymer, tannic acid-zirconium coordination oligomer solution, plant-derived wax esters, and lipase. The preparation method includes: adding plant polyphenols and glutaraldehyde to the delimed bare leather for tanning to obtain primary cross-linked raw leather; adjusting the pH and then adding lysine-chitosan graft polymer and tannic acid-zirconium coordination oligomer for an antibacterial mineralization reaction; then adding plant-derived wax esters and lipase for an enzyme-catalyzed transesterification reaction; finally, drying, rehydrating, and softening to obtain the finished product. This invention, through the synergistic effect of multi-stage processes including composite tanning, synergistic antibacterial action, and enzyme-catalyzed lubrication, enables the composite leather to possess excellent wear resistance, long-lasting antibacterial properties, high breathability, and good softness, making it suitable for wearable devices such as electronic skin and showing promising application prospects.

The present invention relates to a novel composition for waterproofing leather, hides and / or pelts comprising a carboxyl-functional polysiloxane or an epoxide-functional polysiloxane and a polymer dispersion that contains 2 to 35 weight % of carboxylic groups, preferably a polyacrylate dispersion, to obtain leather that has a good water resistance according to ISO DIN EN ISO 5403-2 and DIN EN ISO 5403-1.

The invention relates to a preparation method of high-performance waterproof breathable composite cattle leather. The preparation method comprises the steps of rewetting, retanning, neutralizing, filling and fat liquoring, color register and water fixation. The waterproof agent is added step by step in the whole technological process, so that the problem of leather pore blockage possibly caused by concentrated addition in a single stage is effectively avoided. According to the strategy, natural breathable channels of the leather are reserved to the maximum extent while it is ensured that the leather obtains the extremely high waterproof grade, and therefore the optimal balance of waterproofness and breathability is achieved.

The application discloses a preparation method of a leather-based friction nanogenerator with high output performance, and comprises the following steps: S1, preparing a polycarboxyl cage-type silsesquioxane solution; S2, adding the polycarboxyl cage-type silsesquioxane solution and leather into deionized water and oscillating, adding a pyrrole monomer and a ferric chloride solution, ultrasonic cleaning after deionized water washing, and obtaining an LCF-PCOOH@PPy composite material; and S3, taking the LCF-PCOOH@PPy composite material as a friction positive layer, taking a polymer film PDMS as a friction negative layer, taking copper as an electrode layer, and constructing an (LCF-PCOOH@PPy) / PDMS friction nanogenerator. The preparation method of the leather-based friction nanogenerator with high output performance solves the problems of large internal resistance of the friction nanogenerator and serious material loss of the friction layer in the triboelectric process, thereby limiting the output and the durability of the friction nanogenerator.

The application discloses a preparation method of a leather cultural relic protection material based on a hydrophobic antibacterial eutectic solvent, and specifically comprises the following steps: preparing a hydrophobic antibacterial eutectic solvent DES; mixing the hydrophobic antibacterial eutectic solvent DES and water, emulsifying, dissolving gelatin in the above solution, hydrating, and stirring and reacting under temperature rise to obtain a gelatin solution; dispersing tannic acid in the hydrophobic antibacterial eutectic solvent DES, adding the tannic acid dropwise into the gelatin solution, adjusting the pH of the system, and stirring and reacting to obtain the leather cultural relic protection material. The phenolic alcohol groups on the hydrogen bond acceptor in the eutectic solvent can react with the cell membrane or cell wall of bacteria and molds, so that the antibacterial and moldproof effects are achieved; the hydrophobic chain segments on the hydrogen bond donor can improve the hydrophobicity of the leather cultural relics, and fundamentally prevent the breeding of bacteria and molds. The material prepared by the application can be applied to the protection of leather cultural relics, and can effectively improve the mechanical properties and antibacterial and moldproof properties of the leather cultural relics.

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 utility model provides a soaking device for leather production, which comprises a soaking pool and is characterized in that a support is arranged on the side portion of the soaking pool, a conveying belt is arranged on the support, the upper end portion of the conveying belt is located right above the soaking pool, vertical plates are further installed on the support, a switching shaft is horizontally and rotatably installed between the vertical plates, and the switching shaft is connected with the soaking pool. The end of the switching shaft is connected with a driving structure capable of driving the switching shaft to rotate, a movable frame is fixed to the switching shaft, the movable frame is connected with a buffer hopper through a spring, the buffer hopper is located over the upper end of the conveying belt, a mesh containing table is arranged in the buffer hopper, a vibration motor is installed outside the buffer hopper, and the mesh containing table is connected with the vibration motor. And a discharge pipe is further connected to the buffer hopper.

The invention belongs to the field of leather auxiliaries, and particularly relates to a silicone oil modified leather fatting agent and a preparation method thereof. The preparation method comprises the following steps: dehydrating double-end polyether silicone oil, and reacting with an acidic reactant to obtain functional silicone oil containing double bonds and carboxyl at double ends; dropwise adding into a sulfite aqueous solution for reaction to obtain a first product; dehydrating the other part of double-end polyether silicone oil, reacting with phosphorus pentoxide, adding ammonia water mixed liquor, and stirring to obtain a second product; mixing and stirring the first product, the second product, an emulsifier, white oil and water to obtain a finished product. The method is simple and environment-friendly in process, free of toxic solvents and high-price catalysts, good in product permeability, firm in combination with leather fibers, capable of remarkably improving the softness and yellowing resistance of leather, suitable for industrial production and wide in application prospect.

A method for treating leather to impart stain and oil repellency employs a composition comprising a silicone-(meth)acrylate copolymer. The leather treatment composition is an aqueous emulsion suitable for use on semi-chrome leather and primed leather. The method and composition can also include a silicone polyether to improve coating uniformity, especially when the method will be used to make a top coat on primed leather. The leather treatment composition is free of PFAS.

A composition for impregnating a watchstrap or parts thereof is disclosed, the composition comprising c) a sol-gel, d) at least one active organic compound, wherein the active organic compound is selected from i. an alkylphosphonic acid of the formula CH3(CH2)nPO3H2, with n comprised between 2 and 18, ii. a fluorinated alkylphosphonic acid of the formula CF3(CF2)n(CH2)mPO3H2, with n and m comprised between 2 and 18, m and n being identical or different, and wherein the active organic compound optionally contains at least one functional group selected from (i) an antifouling functional group selected from polyalkylene glycol groups and alkoxyterminated polyalkylene groups and (ii) a bioactive functional group selected from an imidazolium group, a triazolium group or an ammonium group which may be substituted with 1 to 3 C1-C6 alkyl groups, or with 1 or 2 C1-C6 alkyl groups and a C10-C18 alkyl group.

The invention discloses a manufacturing process and application of waterproof leather, after raw leather treatment, a waterproof synthetic fatliquor is added for treatment in the steps of pickling, white tanning and pre-tanning, filling tanning, retanning, dyeing and board dyeing, the leather finally manufactured through the process has the dynamic waterproof performance and the static waterproof performance at the same time, and the waterproof performance is good. Meanwhile, waterproof auxiliary materials are completely used in the manufacturing process of finished leather shoes, waterproof outdoor sports shoes are manufactured together with leather, the excellent waterproof and warm-keeping effects can be achieved in the outdoor long-time exercise process, and the insides of the shoes are kept dry and fresh all the time.

Method for processing hides, fabrics or the like in a rotary chemical reactor (1) comprising the steps of loading the hides or fabrics into the rotary chemical reactor; driving the rotary chemical reactor in rotation; carrying out one or more checks; and only if said one or more checks of the execution step are successfully passed, the method further comprises a step of injecting into the rotary chemical reactor nebulized and / or atomized substances consisting of water vapor (A) or a mixture of water vapor (A) and one or more chemical products (C).

The invention belongs to the technical field of leather deodorization, and particularly relates to a long-acting deodorant for refreshing fruity flavor and a preparation method thereof. The long-acting deodorant is prepared from the following raw materials in percentage by weight: 10 to 25 percent of starch-tea polyphenol microcapsules, 2 to 5 percent of starch-fruit essential oil microcapsules, 10 to 18 percent of composite polymeric zinc complex, 8 to 12 percent of probiotic mixed liquid, 0.5 to 2 percent of EDTA (Ethylene Diamine Tetraacetic Acid) disodium and the balance of pure water. The preparation method comprises the following steps: firstly, preparing two microcapsules through enzymolysis, centrifugation and electrostatic spray drying, and then uniformly mixing the microcapsules with other raw materials. The deodorant cooperates with physical, chemical and biological deodorization mechanisms, is efficient in deodorization, slow-release and lasting in fruity flavor (720 days at most), environment-friendly and safe in raw materials, suitable for leather deodorization and capable of improving the product quality.

The invention discloses graphene-containing multifunctional leather, which comprises a leather main body material and a graphene material, the leather main body material and the graphene material are subjected to composite processing to form a composite structure, the graphene material is uniformly distributed in the leather main body material, the content of the graphene material accounts for 0.1-5% of the total mass of the leather main body material, and the content of the graphene material accounts for 0.1-5% of the total mass of the leather main body material. According to the multifunctional leather containing the graphene, the graphene is compounded with the leather in a specific mode, collaborative integration of multiple functions is achieved instead of simple function superposition, all the functions promote and supplement one another, for example, the antibacterial function is beneficial to maintaining cleanliness of the leather and reducing generation of peculiar smells, and the antibacterial function is beneficial to reducing generation of the peculiar smells; meanwhile, the stability of the graphene structure is kept, so that the functions of promoting blood circulation, resisting wear and the like of the graphene structure are better played, and the leather has wide application prospects in multiple fields due to the multifunctional synergistic characteristic, and can meet the diversified requirements of different users in different scenes.

Disclosed herein are transglutaminase variants having, inter alia, improved chemical stability and / or productivity. Also disclosed herein are uses of the wild type transglutaminase and the transglutaminase variants.

The invention relates to the technical field of leather, and provides tear-resistant sheep leather and a preparation process thereof. A preparation technology of tear-resistant sheep leather comprises the following steps that raw material leather is sequentially subjected to water soaking, alkali spraying unhairing, liming, deliming softening, primary degreasing, pickling, secondary degreasing, tanning, retanning, neutralizing, finishing and coating, and the tear-resistant sheep leather is obtained. The tanning comprises the following steps: in an acid environment, mixing leather subjected to secondary degreasing with a modified graphene aqueous dispersion, and adding a chrome tanning agent for tanning; the modified graphene in the modified graphene aqueous dispersion comprises first modified graphene and / or second modified graphene, the molecular structure of a modifier in the first modified graphene comprises phenyl and an epoxy group, and the molecular structure of a modifier in the second modified graphene comprises phenyl and hydroxyl. Through the technical scheme, the problem of low strength of sheep leather in related technologies is solved.