184results about "Leather degreasing" patented technology

Engineered animal skin, hide, and leather comprising a plurality of layers of collagen formed by cultured animal collagen-producing (e.g., skin) cells. Layers may be formed by elongate multicellular bodies comprising a plurality of cultured animal cells that are adhered and/or cohered to one another; wherein the elongate multicellular bodies are arranged to form a substantially planar layer for use in formation of engineered animal skin, hide, and leather. Further described herein are methods of forming engineered animal skin, hide, and leather utilizing said layers of animal collagen-producing cells.

The invention relates to composite tea saponin, a preparation method thereof and use thereof. The composite tea saponin is prepared by mixing a proper a mount of water with raw materials including 1 to 3 percent of nano titanium oxide, 12 to 18 percent of tea saponin, 1 to 5 percent of methylcellulose, 23 to 45 percent of natural soap powder, 3 to 5 percent of infusorial earth, 6 to 12 percent of sepiolite and 5 to 10 percent of sodium carbonate. The preparation method mainly comprises: nano titanium oxide dispersion, dust-free compounding, granulation and synthesis, wherein the finished product is homogenized by a sieve and discharged in form of grains. The tea saponin can replace one or both of caustic soda and hydrogen peroxide as a finishing agent for use in the fields of textile, leather, paper making, sewage treatment and daily chemical industry. The preparation method can meet the original technical requirements of production and processing industries on the use of the caustic soda and the hydrogen peroxide, simplify technical process, avoid equipment corrosion and material damage, improve product quality, discharge waste water in an environmentally-friendly manner, ensure safety of human bodies, reduce production cost, save energy, labor and time and realize ecological, environmentally-friendly and safe production.

The invention discloses an energy-saving and environmental-protection method for tanning a raccoon fur, which is characterized by adopting the following processes: (1) shunting and grouping; (2) soaking: preparing a soaking solution which contains a wetting fungicide HAC, a soaking enzyme E38, a degreasing agent S-40 and salts; (3) removing meats by water scalping; (4) re-soaking: preparing a re-soaking solution which contains the wetting fungicide HAC, Supralan80, degreasing agent S-50 and salts; stirring while throwing furs; and taking out of the furs and drying; (5) shaving and deep scalping: cutting off the pachydermia part of the fur to cause each part of the fur to have even thickness; (6) softening and pickling: preparing a softening pickling liquor which contains softening enzyme E40, sulfuric acid, Pelgrassol LP, anhydrous sodium sulfate, JFC, salts, formic acid, Eskatan GLS and fatliquoring agent FSE; throwing the furs into the softening pickling liquior for stirring; and then taking out of the furs and leaching; (7) tanning: preparing a tanning solution which contains tschermigite, JFC, salts, mirabilite, auxiliary tanning agent P-3B and fatliquoring agent FSE; stirring while throwing the furs; successively adding NovaltanPF and aluminium tanning agent AL, adding baking soda, stirring, adding the fatliquoring agent FSE and taking out of the furs; and (8) arranging for later stage. The invention has simple processes, reduces manpower consumption, improves use efficiency and saves usage amount of chemical materials and water.

A process for retanning leather has been found, which is characterized in that

• • a) a tanned leather is treated in aqueous liquor in the presence of hollow microspheres filled with blowing agent,
  • b) the leather obtained according to a) is dried after further optional retanning steps and
  • c1) treated with steam at 80 to 120° C., in particular at 80 to 100° C., or
  • c2) with infrared radiation having a wavelength of 0.7 to 100 μm,
  • it also being possible for a finishing step b1) and/or a milling step b2) to follow at a time after the drying step b).

The invention provides a liquid enzyme stabilizing additive and a preparation method and application thereof. The liquid enzyme stabilizing additive comprises the following components: liquid enzyme, an ether nonionic surfactant, a linear or branched chain polymer and a surfactant. Compared with the conventional enzyme stabilizer in the prior art, the liquid enzyme stabilizing additive is environment-friendly and easy to degrade. The liquid enzyme stabilizing additive can be used for any composition containing the liquid enzyme and is particularly suitable for washing compositions, personal nursing care compositions, textile treatment compositions and the like, and the liquid enzyme can exert the using efficacy better.

The invention belongs to the field of instep leather preparation processes, and particularly relates to a preparation process for pig skin top layer instep leather free of chrome tanning. The preparation process comprises the following steps that from pickled skin scytoblastema, the addition quantity of additives in all the procedures is based on the mass of pickled skin, and pickling and softening, main tanning, degreasing and softening, retanning, water extruding and neutralizing, dyeing and stuffing and staking and spouting are included. The preparation process for the pig skin top layer instep leather free of chrome tanning has the advantages that the steps are simple, preparation efficiency is high, the requirement of the preparation process for equipment is low, energy saving and environment friendliness are achieved, and the prepared instep leather is resistant to wear and high temperature, full and soft.

The invention discloses a processing method of a leather material, comprising the following steps of: (1) pre-processing an animal skin into a semi-finished product of the leather material with the thickness of 0.7-1.3mm; (2) cutting the semi-finished product of the leather material into a plurality of layers of skins by utilizing a leather-splitting process; (3) forming scraping pulp for a binding surface of an elastic auxiliary material according to required elasticity so that the elastic range of the formed elastic auxiliary material is identical with that of the split leather material; (4) adhering the binding surface of the split leather material and the binding surface of the elastic auxiliary material at high temperature with a substance containing natural emulsion; (5) placing theadhered leather material into water for cleaning, and washing the scraping pulp for forming in the adhering process; and (6) placing into water again and heating to 45-90 DEG C, adding a softening agent and plant protein oil in the heating process, then adding a water-washing resistant agent, and dewatering and airing. The processing method of the leather material has the advantages of favorable elasticity of the obtained leather material, water-washing resistance and simple and convenient processing procedure. The invention also discloses the leather material.

The invention discloses an environment-friendly tanning process for Tan sheepskin, which is characterized in that it adopts the following steps: 1) spraying water to return moisture; 2) beating wool; 3) soaking in water; 4) degreasing; 5) re-immersing in water; 6) degreasing again ;7) fleshing; 8) pickling; 9) tanning; 10) standing overnight; 11) water rejection; 12) brushing with fatliquoring agent; 13) standing overnight; 14) drying; 15) still damp; 16) Dry shoveling; 17) rinsing; 18) aluminum liquid brushing; 19) drying; 20) dry shoveling; 21) storage. The present invention aims at the hardening of the leather board, hair loss of needles or excessive free formaldehyde in the prior art. After analysis, it is because the traditional process of tanning the tanned surface or nitrating with formaldehyde or aldehyde and aluminum causes the leather surface of the leather board to be tanned. Unsatisfactory, high formaldehyde content and other problems. Now the skins are degreased and then pickled, tanned, brushed with fatliquoring agent, brushed with aluminum liquid, etc., so that the tanning process of Tan sheepskin is more reasonable, the product quality is greatly improved, and the use is increased.

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

The present invention relates to a novel leather making process whereby the post-tanning wet operations are done prior to tanning stage itself to make leather in eco-friendly manner in substantially shorter duration. The present process reduces the number of required steps for leather processing and the pollution load generated in comparison to conventional leather processing.

The invention discloses a method for dyeing Tan sheep skin, which comprises the following steps: softening Tan sheep skin subjected to tanning and airing, and sequentially retanning and dyeing the Tan sheep skin. The dyeing process comprises primary dyeing and secondary dyeing in a rotating drum, wherein the primary dyeing is implemented by dyeing the Tan sheep skin in the rotating drum, in which the dye amount is 1/2-3/5 of the total amount, at 30-32 DEG C for 30-35 minutes; primary color fixation is carried out after the primary dyeing; after the primary color fixation, the rest of dye is added into the rotating drum to carry out secondary dyeing at 60-65 DEG C; and after the secondary dyeing, secondary color fixation is carried out. The dyeing and color fixation are sequentially carried out twice, thereby avoiding the phenomena of nonuniform dyeing and unclear pores due to thick coating, and ensuring the uniform dyeing of the Tan sheep skin. The treatment time of the whole dyeing technique is short.

The invention provides a suede leather production method. Suede leathers are obtained through performing water leaching, ash leaching, ash removal, acid leaching, tanning, uniform turning, retanning,neutralization, dyeing and degreasing and drying on leathers. The retanning process comprises the following steps: after 2% of acid-resistance acrylic acid and 0.5% of acid-resistance grease are usedfor treatment, pH is controlled as 3.0; and a chromium retanning agent is added for treatment. The neutralization process comprises the following steps: 150% of water, 2% of sodium formate and 2% of neutralization auxiliary are added; a rotating drum is rotated by 60 min; then, water washing is performed by 10 min; and the temperature is increased to 60 DEG C. The dyeing and greasing process comprises the following steps: 150% of water with a temperature of 40 DEG C, 1.5% of dicyandiamide tannin, 2% of amphoteric synthesized tannin, 4% of tannin extract and 2% of dye are added; the rotating drum is rotated by 50 min; 2% of sulfonated oil, 2% of phosphate and 5% of synthesized oil are added; the rotating drum is rotated by 50 min; 0.8% of formic acid is added; and the drum is stopped by 3 hours. The retanning, neutralization and greasing processes are improved to improve uniformity, hand feel, fullness, reading-writing effect and mercerization of the suede leathers.

The invention discloses a leather making method for magnetically processing leather making water and a leather chemical water solution into nanometer small-molecule water to be combined with an ultrasonic wave enhancement technology. The leather making method is characterized in that the magnetized nanometer small-molecule water is combined with the ultrasonic wave enhancement technology to be applied to each leather making procedure, so that the efficiency of the physiochemical process of each leather making procedure can be improved, the consumption of chemical materials is reduced, environmental pollution caused by the emission of harmful drugs and industrial wastewater is reduced to the maximum extent, the use quantity of water is greatly saved, the waste of water is decreased in the leather making process, and the production cost is reduced, so that the leather making method is a reform of the traditional leather making method and provides a new effective path for the developmentof the leather industry.

The invention relates to a tanning method for tanning sheepskin clothing leather by a hyperbranched polymer-aluminum salt tanning agent. Current chrome free tanning agents cannot completely replace chrome tanning agents for realizing better anti-hydrothermal stability of leather. The tanning method provided by the invention comprises the following steps of: pre-treating; pickling; tanning; degreasing; retanning; neutralizing; filling; oiling and drying acidic leather. The preparation method of the hyperbranched polymer-aluminum salt tanning agent used in the tanning process comprises the following steps of: mixing diethanol amine and methyl acrylate, and adding methanol to obtain an AB2 type monomer; carrying out reaction of the AB2 type monomer with trimethylolpropane, and adding para-toluenesulfonic acid for temperature rising reaction to prepare hydroxyl-terminated hyperbranched polymer; carrying out reaction of the hydroxyl-terminated hyperbranched polymer with maleic anhydride, adding para-toluenesulfonic acid to prepare an intermediate of an aqueous liquor of the hydroxyl-terminated hyperbranched polymer, and mixing and reacting the intermediate aqueous liquor with analytically pure analytically pure at normal temperature to obtain the hyperbranched polymer-aluminum salt tanning agent. The method provided by the invention is higher in shrinkage temperature and can replace the conventional chrome tanning method, so that chrome tanning pollution is reduced.

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

A kid lamb skin tanning process using an amphoteric vegetable tanning agent is composed of a preparatory step, a tanning step, and a finishing step; the preparatory step comprises softening collected kid lamb raw skins to restore the raw skins to the conditions of fresh skins, and removing redundant components between skin plate fibers of the raw skins; the tanning step comprises primary tanning and main tanning; in the tanning step, filling primary tanning of the skins is completed mainly by means of the characteristics of macromolecules, high filling ability, good extensibility, and stable stereostructure of the vegetable tanning agent; further, in the tanning step, tanning is carried out by using a low-astringency low-concentration vegetable tanning liquor, and after the collagenous fibers of the naked skins are primarily immobilized, permeation and filling of the tanning liquor are completed gradually to guarantee that a tannin gradually permeates into the naked skins and bonds with skin collagen; and the finishing step comprises fat-liquoring, moisture regaining, staking and shaping of the skin plates as well as hair finishing. The kid lamb skins tanned by means of the kid lamb skin tanning process using the amphoteric vegetable tanning agent has the advantages of small difference between thin and thick parts of the skin plates, full plate texture, fine piles, and locks of bent hair that is natural, has rich wonderful luster and may rival Tan-sheep kid furs.

Disclosed is a method of fabricating an automotive seat cover leather. The method includes a preparing process, a tanning process, a neutralizing process, a retanning process, an elastic material adding process, a dyeing/fatliquoring process, and a surface fixing process. After the leather has gone through the tanning process and neutralizing process, the retanning process adds a tanning agent to the leather. The elastic material adding process adds a silicon-based elastic material to induce elasticity in the retanned leather. The dyeing/fatliquoring process adds a dye to the leather in which the elastic material has been added and adds an anion fatliquoring agent to the leather to provide flexibility. The surface fixing process fixes the elastic material, dye, and fatliquoring agent on and in the leather.

Relating to the technical field of leather degreasing, the invention provides a composite lipase degreasant and application. The composite lipase degreasant is prepared from, by weight, 15-25 parts of lipase and 10-15 parts of surfactant. The lipase is neutral lipase or alkali lipase; the surfactant is a sulfonate surfactant, polyoxyethylene ether surfactant or or a plurality of sulfonate surfactants and polyoxyethylene ether surfactants. The composite lipase degreasant and application, by synergistic effects of the lipase and surfactant, enhances the degradation of lipase to grease and makes intracutaneous grease easily eluted from crust so as to reach highly efficient degreasing effects. Applicable to degreasing all kinds of animal skins, such as pigskin, sheepskin, goat skin and buffalo hide, the composite lipase degreasant and application has mild skin effects, which is economical, eco-friendly and applicable to degreasing in different procedures.

The invention relates to a rotary drum for improving an internal baffle plate structure of a drum body in leather production, which is provided with a drum body. The drum body is provided with a cylindrical drum inner container and a plurality of baffle plates which are installed in the drum inner container; and the drum inner container is provided with two drum side walls and a cylindrical drum inner wall. The bottom end of each baffle plate is in closed fixation connection with the circumference surface of the drum inner wall; two side ends of each baffle plate are respectively in closed fixation connection with the two drum side walls; the height of each baffle plate is one fifth to one third of the inner circle diameter of the drum inner wall; and in the cutting plane which is perpendicular to an axis of the drum inner container, an included angle formed by each baffle plate and the inner circle tangent of the drum inner wall at the connecting position of the bottom end of the baffle plate and the drum inner wall is 50-70 degrees. Accordingly, the rotary drum can bag and splash leather and liquid together during oriented rotation, thereby improving the loading rate and the working efficiency and having good leather processing effect.