204results about "Leather impregnation" patented technology

The invention discloses a chemical impregnation process for antibacterial and bacteriostatic treatment of leather, and belongs to the technical field of leather impregnation. The process comprises the following steps: step 1, fixing two ends of the leather through an extension device to enable the leather to be kept in a horizontal state for impregnation; secondly, the leather is pressed downwards through an extension device, so that the leather deforms to change the pore structure of the leather and the surface tension of the leather, and the dipping efficiency is improved; after the two ends of leather are fixed, the leather can be stretched through the pressure applied to the supporting rods and the extension wheels by the first springs, then the whole surface of the leather can be stretched under the movement of the extension wheels through the reciprocating movement of the obliquely-arranged extension wheels, and the whole leather can bear stretching in the front-back direction; when the leather is stretched, pores or fiber gaps in the leather can be correspondingly opened, so that treatment liquid such as liquid medicine can permeate into the leather more easily.

The invention relates to the technical field of leather processing, in particular to a leather forming processing device for automotive trim. The device comprises a pretreatment device and a mold device, the rear side of the mold device is connected and provided with a trimming device, the front side of the mold device is connected and provided with a heating device, and the mold device is internally provided and connected with a cooling device. The pretreatment device is used for improving the quality and the processing efficiency of leather, improving the consistency of products and effectively shortening the production cycle, the mold device is used for forming the leather, ensuring the size accuracy and effectively improving the consistency of the products, and the heating device is used for softening the leather, facilitating subsequent processing, improving the process effect and effectively improving the quality of the products. The cooling device is used for rapidly cooling leather, stabilizing the size and effectively improving the product precision, the trimming device is used for finely adjusting the leather and improving the finished product quality, and the safety monitoring device is used for guaranteeing the safety of the machining process and effectively improving the operation safety.

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.

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 invention relates to a method for dyeing and / or retanning a leather article, said method comprising the following steps: providing (2) a leather article treated at least by a tanning process; introducing (4) the leather product into a processing chamber; subjecting (6) the leather article in the processing chamber to the action of a pressurized fluid; controlling (10) the pressure of the pressurized fluid to reach a supercritical state; subjecting the leather article to the action of a colouring agent and / or a retanning agent, said colouring agent or retanning agent being dissolved and / or transported in the pressurized fluid at least for a predetermined period of time when the pressurized fluid is in the supercritical state; reducing (12) the pressure in the processing chamber; removing (14) the leather article from the processing chamber; wherein the step of reducing the pressure in the processing chamber comprises controlling the pressure to be reduced over time.

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.

To provide improved mycelium materials with favorable mechanical properties, aesthetic properties, and other advantages, as well as materials and methods for making the improved mycelium materials.SOLUTION: A method for producing a composition of a mycelium material comprises: a. generating a cultivated mycelium material; b. contacting the cultivated mycelium material with a solution comprising one or more proteins to produce a composition comprising the cultivated mycelium material and one or more proteins, wherein the one or more proteins are derived from a species other than a fungal species from which the cultivated mycelium material is generated; and c. pressing the cultivated mycelium material. Also provided is an article of footwear comprising the mycelium material.SELECTED DRAWING: Figure 1

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 present invention relates to a polyurethane resin composition including an isocyanate group-terminated urethane prepolymer (E) and a neutralizer (F). The isocyanate group-terminated urethane prepolymer (E) contains a reaction product of a polyol (A) containing a polycarbonate polyol (B) having an average number of hydroxyl functional groups exceeding 2, an organic acid (C), and a polyisocyanate (D), in which a total content of urea groups in the polyurethane resin composition is 0.01 to 0.80 mmol / g with respect to a sum of a mass of the isocyanate group-terminated urethane prepolymer (E) and a mass of the chain extender (G), and the polycarbonate polyol (B) has a deemed average number of functional groups of 2.0 to 3.90.

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 relates to the use of a tannin-containing product which can be produced or is produced by means of (i) an aqueous solution or dispersion, containing one or more polar organic solvents, in the form of an extract, or (ii) a supercritical solvent in the form of a residue of the extraction, or (iii) pure water in the form of a residue of the extraction, or (iv) a mixture of a supercritical and a polar solvent in the form of a residue of the extraction, for tanning and / or retanning hides or skins or intermediate products thereof resulting from leather production; and further related subject matter of the invention.

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 discloses a novel metal leather preparation process in the field of leather preparation, which comprises the following steps: (1) leather pretreatment: selecting sheepskin with the thickness of 0.2-0.8 mm, cutting the leather to a proper size, soaking the leather in an aqueous solution containing a surfactant for 1-2 hours, controlling the temperature at 30-40 DEG C and the pH value at 6.2-6.8, then washing the leather with clear water, and drying the leather; drying at the temperature of 50-60 DEG C, and treating for 30 seconds by using plasma with the power of 150W for later use; (2) preparing a metal salt solution, namely weighing a certain amount of metal salt, adding the metal salt into deionized water, and uniformly stirring to prepare the metal salt solution with the mass fraction of 5-15%; the novel metal leather preparation process provided by the invention can be used for preparing novel metal leather with good metal coating adhesion, surface hardness, glossiness, wear resistance and the like, the process is simple, the cost is relatively low, the interface shear strength is improved, the thermal impedance is also reduced, and the novel metal leather preparation process has a good application prospect.

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.

The present invention provides a process for the use of a re-tanning composition comprising rice husk in the leather process that provides good re-tanning behaviour.

The invention belongs to the technical field of greasing agents in leather chemical materials, and discloses a high-uniformity greasing agent and a preparation method thereof. The method comprises the following steps: introducing air into vegetable oil, heating and stirring for oxidation reaction, adding an emulsion reaction solution, continuing heating and stirring for sulfitation reaction, and adjusting the pH value of the reaction solution to 6-8 after the reaction is finished. According to the invention, the defect of layering of the oxidized sulfated leather fatting agent after standing is improved, and the uniformity of the fatting agent is improved. The fatting agent prepared by the technology is stable in performance; the product fluidity is good; good emulsifying performance, acid resistance, alkali resistance and chromium resistance stability are achieved; when the fatting agent is compounded with other fatting agent products, the emulsifying property and the stability of the compounded product can be improved. Leather subjected to fat liquoring by using the fat liquoring agent has good softness, fullness and yellowing resistance.

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 belongs to the technical field of leather softening agents, and particularly relates to an aged leather softening agent based on wool fat / soybean polysaccharide as well as a preparation method and application of the aged leather softening agent. The softening agent is prepared by mixing glycerol, amino silicon oil, wool fat and a soybean polysaccharide aqueous solution. The preparation method of the softening agent comprises the following steps: mixing a soybean polysaccharide aqueous solution with glycerol to obtain a first mixture; adding amino silicon oil into the first mixture, and mixing to obtain a second mixture; and adding molten wool fat into the second mixture, and mixing to obtain the aged leather softening agent based on wool fat / soybean polysaccharide. The lanolin / soybean polysaccharide-based aged leather softening agent is prepared from pure natural soybean polysaccharide, glycerol, amino silicon oil and lanolin, so that deep penetration of aged leather and effective filling of fiber gaps are realized, and the softness, color and luster and heat resistance of the aged leather can be remarkably improved.

The invention relates to a method for dyeing and / or retanning of leather objects, said method comprising the steps of providing (2) a leather object, which leather object has been processed by at least a tanning process, introducing (4) the leather object into a process chamber, subjecting (6) the leather object in the process chamber to a pressurized fluid, controlling (10) the pressure of the pressurized fluid to reach a supercritical state, subjecting the leather object to a dyeing agent and / or a retanning agent, which dyeing or retanning agent is dissolved and / or transported in the pressurized fluid for at least a predefined period of time while the pressurized fluid is in the supercritical state, reducing (12) the pressure in the process chamber, removing (14) the leather object from the process chamber, wherein the step of reducing the pressure in the process chamber comprises controlling the pressure reduction over time.