104results 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.

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.

According to the preparation method of the nano microcapsule with the mildew-proof function, provided by the invention, the embedding rate, the drug loading rate and the yield of the microcapsule are effectively improved by adjusting the concentration of a water phase of chitosan, the concentration of a PCL polymer and the ratio of the mildew-proof agent to the PCL; the microcapsule disclosed by the invention has excellent mildew-proof performance, and can be used as a functional additive to be added into an industrial coating, so that a coating is endowed with long-acting mildew-proof capability; the anti-mildew agent can also be widely applied to anti-mildew protection in the fields of wood, leather and textile fabrics, and has huge application potential.

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 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 present invention belongs to the technical field of leather softening agents, and specifically relates to a lanolin / soybean polysaccharide-based softening agent for aged leather, its preparation method, and application. The softening agent of the present invention is formed by mixing glycerol, aminosilicone oil, lanolin, and a soybean polysaccharide aqueous solution. The preparation method of the softening agent comprises: mixing the soybean polysaccharide aqueous solution and glycerol to obtain a first mixture; adding aminosilicone oil to the first mixture and mixing to obtain a second mixture; adding melted lanolin to the second mixture and mixing to obtain the lanolin / soybean polysaccharide-based softening agent for aged leather. The present invention uses pure natural soybean polysaccharides, glycerol, aminosilicone oil, and lanolin to prepare the lanolin / soybean polysaccharide-based softening agent for aged leather, which not only achieves deep penetration into aged leather and effective filling of fiber gaps, but also significantly improves the softness, color, and heat resistance of aged leather.

The invention discloses a method for deacidifying Tan sheep fur double-face leather, and particularly relates to the technical field of fur processing, which comprises the following steps: S1, pretreatment before deacidification; s2, washing with water; s3, neutralizing with a neutralizing solution; s4, fat liquoring is carried out; and S5, performing subsequent treatment. According to the method for deacidifying the Tan sheep fur double-face leather, residual chemicals and scraps can be efficiently removed through multi-stage countercurrent water washing, in the neutralization step of the neutralization liquid, the temperature, the chemical proportion and the stirring speed are accurately controlled, bromocresol green detection is combined, it is ensured that the neutralization reaction is complete, the deacidification effect is remarkable, and the deacidification efficiency is high and thorough; through the fat liquoring step, the double-face leather fully absorbs a fat liquoring agent and recovers softness and glossiness, meanwhile, through pretreatment and optimized operation of all links, damage to double-face leather fibers is avoided, the quality of the double-face leather is guaranteed, the quality of the double-face leather is remarkably improved, through biological enzyme softening treatment, use of chemical agents is reduced, environmental pollution is reduced, and the method meets the environmental protection requirement; the environment-friendly benefit is outstanding.

The invention discloses a treatment method of mycelium leather, and relates to the field of leather, and the treatment method comprises the following steps: 1, carrying out deacetylation treatment on a freshly harvested mycelium material obtained by solid fermentation; 2, washing the mycelia subjected to deacetylation treatment with water, and keeping the pH value at 5.5-7; 3, tanning treatment is conducted on the mycelium material through a cyanuric chloride derivative type tanning agent; 4, retanning is conducted after washing is conducted again; 5, the mycelium leather is filled; according to the method, when a freshly harvested mycelium material is obtained through solid fermentation, a culture medium is coated with gelatin, hydrogen bond and electrostatic interaction can be generated between the gelatin and a chitin / glucan network on the outer wall of mycelia in the growth period of the mycelia, and then the mycelia are subjected to fat liquoring; and a'albumen glue layer 'formed by gelatin can also be used as a template structure to promote ordered growth of hyphae, so that the overall density is improved, and holes and weak binding areas are reduced on a microstructure.

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 field of furniture leather processing, and more particularly to a greasing process for furniture leather. The greasing process for furniture leather comprises, in sequence: rinsing → chrome retanning → water washing and neutralization → dyeing / greasing → water washing, drum drying. On the one hand, the preparation process of the present application utilizes a relatively stable greasing agent, which reduces volatilization and oxidation of the greasing agent during use, thereby reducing the VOC (Volatilization Oxide) value and atomization value released by the leather and improving the leather's oxidation resistance. On the other hand, during the dyeing / greasing step, the acrylate retanning agent, dicyandiamide, and melamine form a protective film on the surface of the leather embryo that has good adhesion to the leather embryo, filling small holes and defects on the leather surface and reducing the leather's contact with oxygen. Furthermore, the VOC value and atomization value of the prepared leather are reduced, and the oxidation resistance of the leather is improved.

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 invention discloses a treatment process for wear-resistant and anti-fouling baseball leather. The treatment process comprises the following steps: S1, soaking and fleshing; s2, unhairing expansion and re-liming; s3, decolorizing and bleaching; s4, pickling treatment; s5, carrying out chrome-free tanning, taking out of a drum and squeezing water; s6, slicing and peeling, rinsing and neutralizing; s7, fat liquoring and retanning; and S8, hanging, airing and staking. Two-step shaping is adopted in the steps of chrome-free tanning and drum-out wringing, so that the leather treated according to the scheme is in a half-cooked state instead of being treated to be in a full-cooked state, and the baseball made of the leather can be shrunk when being hit in the hitting process, so that the color of the baseball is increased, and the color of the baseball is increased. However, leather tanned in the prior art can expand and loosen after being used for a period of time. The anti-hitting performance of baseballs in the market is not good all the time, the baseballs start to deform after being hit for less than 2000 times and cannot rebound, and the baseball leather treated through the process has the excellent performance of being good in anti-hitting performance, resistant to abrasion and free of deformation.

The utility model provides a high emulsibility leather fat liquoring centrifuge which comprises a supporting frame, a driving seat and a centrifugal cylinder, and an adjusting shaft seat is fixedly installed on the surface of the supporting frame and used for adjusting the inclination angle of the device. The driving seat is connected with the centrifugal cylinder through the main shaft disc and is driven by the motor to rotate; and a plurality of ultrasonic oscillators are arranged on the surface of the centrifugal barrel, electric power is provided for the centrifugal barrel through the electrode system, the oscillation effect is generated, and the fat liquoring effect is further improved. The device combines the functions of centrifugal rotation and ultrasonic oscillation, ensures that fat liquoring liquid is uniformly distributed on the surface of leather, and is particularly suitable for fat liquoring treatment of high-emulsibility leather. The oscillation frequency and amplitude are adjusted through the control system, and the requirements of leathers with different thicknesses and materials are met. The device improves the grease adding uniformity and efficiency, and is high in adaptability, simple and convenient to operate and convenient to maintain.

The invention relates to a low-carbon and energy-saving frosted leather manufacturing technology. The technology comprises the following steps of leather buffing, rewetting, retanning, neutralizing, dyeing and fat liquoring, wringing and stretching, hanging and drying, moisture regaining, milling, toggling drying and measuring scale warehousing. Wherein leather buffing is conducted, specifically, the wet blue leather subjected to shaving treatment is flattened, and abrasive paper of a leather buffing machine is adopted for conducting leather buffing treatment on the wet blue leather till horizontal fluff of the wet blue leather is erected, and a fluff layer is formed. The buffing process is advanced, the buffing process can be completed only through one-time dyeing operation, the whole technological process is optimized, the production time is shortened, the labor cost is reduced, and the production efficiency is improved; moreover, a coating section is omitted, so that the production period is further shortened, and carbon emission caused by long-time production is reduced.

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.

The application relates to a preparation method of a dicyandiamide resin grafted keratin tanning agent for leather processing. Waste cattle hair is added with deionized water, alkali, calcium hydroxide, polyaluminum chloride and polyacrylamide flocculation precipitation, filtration, filtration liquid is taken, drying is carried out, the filtration liquid is dissolved in water, pH value is adjusted, 5,5-dihydroxyvaleraldehyde and sulfuric acid are added, pH value is adjusted, benzene carboxylic acid containing is taken, dissolved in thionyl chloride, N,N-dimethylformamide is added, rotary evaporation is carried out to obtain benzene carboxylic acid containing, dicyandiamide, aldehyde group functionalized keratin, glyoxal, glutaraldehyde, ethanol are mixed, pH value is adjusted, then benzene carboxylic acid containing and diethyl ether are added, and pH value is adjusted. Through the flocculation effect of calcium hydroxide, dirt and impurities in the cattle hair are captured, a large amount of water and surfactants are saved, no wastewater is discharged; the reactivity of amino groups and carbonyl groups is utilized to obtain aldehyde group functionalized keratin; the addition reaction of aldehyde group functionalized keratin and dicyandiamide can occur, the molecular weight of the dicyandiamide grafted keratin is increased, and the grafting rate is improved.

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 present invention relates to the technical field of leather products, and in particular to a method for preparing anti-fouling, self-cleaning goat glove leather, comprising the following steps: S1, placing the goat leather in a cleaning tank for salt washing; S2, placing the salt-washed goat leather in a softening tank for softening, and then washing with water after softening; S3, performing acid immersion in a pickling tank, and then tanning after the acid immersion is completed; S4, performing an oxidation treatment in an oxidation tank, and then washing with water to obtain the tanned goat glove leather, which is then immersed in an immersion liquid, taken out, and dried. The present invention not only enhances the leather's resistance to dirt by introducing a copolymer of sulfur-modified polymethyl methacrylate and methylbutene, but also makes it easier for dirt to fall off the leather surface. At the same time, the protective film effectively prevents the penetration of moisture and dirt, thereby extending the service life of the leather.

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.