CN109182620B - Leather making method by step greasing - Google Patents
Leather making method by step greasing Download PDFInfo
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- CN109182620B CN109182620B CN201811040800.0A CN201811040800A CN109182620B CN 109182620 B CN109182620 B CN 109182620B CN 201811040800 A CN201811040800 A CN 201811040800A CN 109182620 B CN109182620 B CN 109182620B
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C9/00—Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes
- C14C9/02—Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes using fatty or oily materials, e.g. fat liquoring
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Abstract
The invention relates to the technical field of tanning chemistry and engineering, and provides a step-by-step fat liquoring tanning method, which omits the conventional fat liquoring procedure and is realized by distributing the fat liquoring procedure in the procedures of softening, retanning, neutralizing, filling and dyeing and chromatography; the leather making method adopting the step-by-step fat-liquoring adopts different types of fat, organic silicon fat-liquoring agent and vinyl polymer fat-liquoring agent, and the fat-liquoring agents are added step by step in different procedures, so that the problems that the sensory property of leather cannot meet the requirements of modern leather products and the total absorption rate of the used single fat is low due to the use of the single fat are solved, the using amount of the fat in the making process is small, the absorption rate is high, and the using amount of the fat is reduced by more than 25%; the softness and fullness of the prepared leather are better than those of the leather prepared by a one-step greasing method or a single grease step-by-step greasing method, the production cost of the method is reduced, the contents of COD and BOD in waste liquid are reduced, the operation is easy to realize, and the method is suitable for popularization and application in leather production.
Description
Technical Field
The invention relates to the technical field of leather-making chemistry and engineering, in particular to a leather-making method by step greasing.
Background
Fatliquoring is an important process in leather production, and the fatliquoring (also called oiling) of leather is a process of treating the leather with grease or a fatliquor so that the leather absorbs a certain amount of grease to endow the leather with certain physical and mechanical properties and use properties. The purpose of greasing is to wrap grease on the surface of leather fibers through chemical and physical actions, form a layer of oil film with a lubricating effect between the fibers, disperse the fibers, and increase the mutual mobility between the fibers, so that the leather becomes soft and folding-resistant and has certain service performance. The greasing is one of the main processes of the leather in the wet dyeing and finishing process, determines the softness, fullness and elasticity of the finished leather, influences the physical and mechanical properties of the finished leather such as strength, elongation and the like and the sanitary properties of the leather such as water absorbability, air permeability, water permeability and the like, and can also endow the finished leather with special service properties such as water resistance, oil resistance, pollution resistance, flame retardance, atomization resistance and the like by oiling.
In the leather-making wet dyeing and finishing process, the traditional fatliquoring method is to add about 15 to 20 percent of fatliquoring agent in the fatliquoring procedure at one time, and the fatliquoring method has the advantages of large material consumption and high cost; the absorption rate of the grease is low, so that the leather surface is easily greasy, and even grease is generated; but also obviously increases the content of organic matters in the tannery waste liquid and increases the cost of wastewater treatment. The greasing method can not meet the requirements of modern leather production, and the produced products can not meet the requirements of customers, and are not in line with the production mode of economy, energy conservation and environmental protection.
Disclosure of Invention
Therefore, aiming at the problems, the invention provides a step-by-step greasing leather making method, which omits the conventional greasing procedure and distributes the greasing procedure into the procedures of softening, retanning, neutralizing, filling dyeing and chromatography to realize; the leather making method adopting the step-by-step fat-liquoring adopts different types of fat, organic silicon fat-liquoring agent and vinyl polymer fat-liquoring agent, and the fat-liquoring agents are added step by step in different procedures, so that the problems that the sensory property of leather cannot meet the requirements of modern leather products and the total absorption rate of the used single fat is low due to the use of the single fat are solved, the using amount of the fat in the making process is small, the absorption rate is high, and the using amount of the fat is reduced by more than 25%; the softness and fullness of the prepared leather are better than those of the leather prepared by a one-step greasing method or a single grease step-by-step greasing method, the production cost of the method is reduced, the contents of COD and BOD in waste liquid are reduced, the operation is easy to realize, and the method is suitable for popularization and application in leather production.
In order to realize the technical problem, the solution scheme adopted by the invention is as follows: a leather-making method by step greasing comprises the following procedures of wringing and shaving wet blue leather, weighing → softening → retanning → neutralization → filling dyeing → topping → setting aside;
adding a synthetic fat liquor and a vinyl polymer fat liquor in the softening process, wherein the synthetic fat liquor added in the softening process is a nonionic synthetic fat liquor or an anionic synthetic fat liquor;
in the retanning procedure, an anionic synthetic fatliquor and an organic silicon polymer are also added;
in the neutralization process, a natural phospholipid fatliquor and a vinyl polymer fatliquor are also added;
modified animal oil, anion synthetic fat liquor, organic silicon polymer, organic silicon fat liquor and vinyl polymer fat liquor are added in the filling and dyeing process;
and a cationic organic silicon polymer and a nonionic fatting agent are also added in the color register process.
Further, the organic silicon polymer is one of amphoteric organic silicon polymer and cationic organic silicon polymer.
Further, the organic silicon fatting agent is one of polyether type organic silicon fatting agent and amino type organic silicon fatting agent.
Further, the cationic silicone polymer is one of cationic polyurethane silicone polymer and cationic polyacrylate silicone polymer.
Further, the reagent dosage is determined according to the quality of the shaved wet blue leather, and the softening process comprises the following steps: adding 200% of water into the rotary drum, adjusting the temperature in the drum to 40 ℃, adding 0.5-1.0% of nonionic synthetic oil or anionic synthetic oil, adding 0.5-2.0% of vinyl polymer fatliquor, and rotating for 30-60 minutes; adding 0.3-1.0% organic acid, rotating for 60-90 min, controlling pH value of bath liquid at 3.0-3.3, and discharging liquid.
Further, the dosage of the reagent is determined according to the quality of the shaved wet blue leather, and the retanning procedure comprises the following steps: adding 100% of water into the rotary drum, adjusting the temperature in the drum to 35 ℃, adding 0.8-1.2% of anion synthetic oil and 1-2.5% of fatty aldehyde, and rotating for 30 minutes; adding 1-2% of amphoteric polymer and 1-2% of organic silicon polymer, and rotating for 40-60 minutes; adding 3-5% of chromium-containing material and 2-3% of protein filler, and rotating for 90-120 minutes; then adding 1-2% sodium formate, rotating for 20 minutes, adding 0.3-0.8% baking soda, and rotating for 30-60 minutes; the pH value of the bath liquid is controlled to be 3.9-4.1, the bath liquid is rotated and stopped for 180-300 minutes in a mode of rotating for 3 minutes and stopping for 33 minutes, and then the liquid is discharged.
Further, the amphoteric polymer is one of amphoteric acrylic resin and amphoteric melamine resin.
Further, the dosage of the reagent is determined according to the quality of the shaved wet blue leather, and the neutralization process comprises the following steps: adding 100% of water into the rotary drum, adjusting the temperature in the drum to 33 ℃, adding 0.5-1.0% of natural phospholipid and 3% of buffer type neutralizing agent, and rotating for 30 minutes; adding 0.3% -0.8% sodium bicarbonate, rotating for 30min, and controlling bath liquid pH at 4.8-5.0; then 3% -5% of acrylic resin tanning agent and 2% -4% of vinyl polymer fatting agent are added, the mixture is rotated for 60-90 minutes, and liquid is discharged; washing with water and discharging liquid.
Further, the reagent dosage is determined according to the quality of the shaved wet blue leather, and the filling and dyeing process comprises the following steps: adding 50% of water into the rotary drum, adjusting the temperature in the drum to 33 ℃, adding 0.5% -1.0% of anion modified animal oil and 1.0% -2.5% of vinyl polymer fatliquor, and rotating for 30-60 minutes; adding 3-5% of plant tanning agent, 2-4% of amino resin tanning agent, 3-5% of substitute type synthetic tanning agent and 0.5-1.5% of auxiliary type synthetic tanning agent, and rotating for 40-60 minutes; adding 0.5-1.0% of anion synthetic oil and 1.0-3% of organic silicon fatting agent, and rotating for 30-50 minutes; adding 3-5% of plant tanning agent, 2-4% of amino resin tanning agent, 3-5% of substitute type synthetic tanning agent and 1.5-3.5% of dye, and rotating for 60-120 minutes; adding 1-3% of acrylic resin tanning agent and 2-4% of organic silicon polymer, and rotating for 60-90 minutes; after water replenishing, temperature rising and formic acid adding for fixation, the pH value of the bath liquid is controlled to be 4.3-4.5; adding 0.1% -0.15% of baking soda, and rotating for 20 minutes; adding 1-3% of anion synthetic oil, 1-3% of anion modified animal oil, 1-2% of lecithin, 3-5% of organic silicon fatting agent and vinyl polymer fatting agent, 0.1-0.2% of mildew preventive, and rotating for 40-60 minutes; adding 1-3% of acrylic resin tanning agent, and rotating for 30-60 minutes; after formic acid is added for fixation, the pH value of bath liquid is controlled to be 3.4-3.6, and liquid is discharged; washing with water and discharging liquid.
Further, the reagent dosage is determined according to the quality of the shaved wet blue leather, and the color register process comprises the following steps: adding 200% of water into a rotary drum, adjusting the temperature in the drum to be 45 ℃, adding 0.5% -1.5% of dye, rotating for 10-20 minutes, adding 0.5% -1.0% of formic acid, rotating for 10-20 minutes, adding 0.1% -1% of dye, rotating for 10-15 minutes, adding 0.5% -1.0% of formic acid, rotating for 10-20 minutes, adding 0.5% -1% of metal tanning agent, rotating for 20-25 minutes, and finishing color registering; then adding 0.5-1.5% of cationic polyurethane organic silicon polymer and 0.5-1.0% of nonionic oil, rotating for 10-20 minutes, and discharging liquid; washing with water and discharging liquid.
By adopting the technical scheme, the invention has the beneficial effects that: the leather making method by step fatliquoring of the invention uses the fatting agent with high emulsibility and the vinyl polymer fatting agent in the softening procedure, does not use the surfactant, but can play the same roles of softening and returning water; in the retanning procedure, the tear-resistant promoting anionic synthetic oil is used, and the amphoteric acrylic resin and the weak anionic amphoteric organosilicon polymer are also used, so that the thickness of the leather is more uniform; in the neutralization process, natural phospholipid and vinyl polymer fat liquor are used, so that the excessively strong elasticity or plastic feeling caused by acrylic resin can be eliminated; 1-time organic silicon fatting agent and 1-time polymer fatting agent are used in the filling and dyeing process, and the 1-time organic silicon polymer can slow down the fast combination of retanning and filling materials and leather fibers, so that the retanning and filling materials can penetrate into the leather fibers more deeply and can be combined with the leather fibers more uniformly and gently; after temperature rise and acid fixation, the fatting agent with the total amount of 4-6 percent is used, and the organic silicon fatting agent and the vinyl polymer fatting agent with the total amount of 3-5 percent are also used, so that the finished leather has good oil feeling, but does not generate greasy feeling; the cationic organic silicon polymer is used in the color registering process, and the material added in the previous process is fixed; meanwhile, the leather is fatted step by step in each procedure, so that the leather is gradually endowed with the softness, the leather body of the finished leather is soft, the grain surface is compact, and the grade and the value of the finished leather are improved.
In conclusion, the leather making method by step fatliquoring can reduce the using amount of the fatliquoring agent (the total using amount of the fatliquoring agent is about 10 percent) under the condition of ensuring that the leather quality is not reduced, and saves the material cost; by adopting a step-by-step greasing method, the produced leather has no greasy feeling and no oil cream phenomenon on the surface, and the stability of the product quality is improved; because the vinyl polymer fatting agent and the organic silicon polymer are used, the produced leather has better waterproof and antifouling capabilities, the dynamic waterproof can reach more than 5000 times, and the antifouling capability is superior to that of the leather produced by the conventional process; the plumpness and the softness of the leather are superior to those of the leather produced by adopting a conventional greasing method; meanwhile, the absorption rate of the fatting agent is improved, the content of organic matters in the tanning waste liquid is reduced, and the cost for treating the tanning waste water is reduced.
Detailed Description
The present invention is described in detail below with reference to specific embodiments, so that how to apply technical means to solve technical problems and achieve technical effects can be fully understood and implemented, and it should be noted that the embodiments are only used for further description of the present invention and should not be construed as limiting the scope of the present invention, and those skilled in the art can make modifications and adjustments according to the above disclosure.
Unless otherwise indicated, the techniques employed in the examples are conventional and well known to those skilled in the art, and the reagents and products employed are also commercially available. Various procedures and methods not described in detail are conventional methods well known in the art, and the source, trade name, and if necessary, the constituents of the reagents used are indicated at the first appearance.
A leather making method by step fat liquoring sequentially comprises the following procedures:
1. and (3) squeezing and shaving the wet blue leather, weighing the shaved wet blue leather, and using the mass of the shaved wet blue leather as the reference of the dosage of various reagent materials in the subsequent process.
2. Softening: adding 200% of water into the rotary drum, adjusting the temperature in the drum to 40 ℃, adding 0.8% of nonionic synthetic oil OSL (Toeplier leather chemical Co., Ltd.), adding 1.0% of vinyl polymer POL (Vanmeng Wantong chemical Material Co., Ltd.) and rotating for 60 minutes; adding 0.6% formic acid, rotating for 60min, and discharging liquid.
3. Retanning: adding 100% of water into a rotary drum, adjusting the temperature in the drum to 35 ℃, adding 1% of anion synthetic oil PEM (Jinjiang, Qiangde materials trade Co., Ltd.), 1.5% of fatty aldehyde PF (sima chemical Co., Ltd.), and rotating for 30 minutes; adding 1.5% of amphoteric acrylic resin TGR (Delhi leather chemical Co., Ltd.) and 1.5% of amphoteric organic silicon polymer 2034 (Chengdu Kate organic silicon New Material science and technology Co., Ltd.), and rotating for 40 minutes; adding 2% chrome tanning agent (Turkey Hill Co., Ltd.), 3% chromium-containing synthetic tanning agent BO (Shanghai Meya Kogyo Co., Ltd.), 2% protein filler FB (Sichuan Desair chemical industry Co., Ltd.), and rotating for 90 min; adding 2% sodium formate, and rotating for 20 min; adding 0.3% sodium bicarbonate, and rotating for 30 minutes; rotating for 3 minutes, stopping for 33 minutes, co-rotating and stopping for 240 minutes; and (6) draining.
4. Neutralizing: adding 100% of water into the rotary drum, adjusting the temperature in the drum to 33 ℃, adding 0.8% of natural phospholipid BA (sima chemical Co., Ltd.), adding 1% of sodium formate and 2% of neutralized tannin PAK-S (Jinjiang City kurtosis chemical industry Co., Ltd.), and rotating for 30 minutes; 0.5% sodium bicarbonate, rotating for 30 min; adding 2% of anionic acrylic resin tanning agent TP340 (Apa chemical Co., Ltd.), 2% of amphoteric acrylic resin tanning agent TGR (Delauy leather chemical Co., Ltd.), and 2% of vinyl polymer fatliquoring agent SOF (Delauy leather chemical Co., Ltd.), and rotating for 90 minutes; draining; washing with water; and (6) draining.
5. Filling and dyeing: adding 50% of water into the rotary drum, adjusting the temperature in the drum to 33 ℃, adding 0.5% of anion modified animal oil ZBN (BASTAN INTERNATION TRADE Ltd) and 1.5% of vinyl polymer fatliquor SOF (Derui leather chemical Co., Ltd.), and rotating for 30 minutes; adding 3% of tannin extract ATO (Shenzhen, Shanggui, Zhenjiang, Heishi, leather chemical Co., Ltd.), 3% of amino resin retanning agent R7(LANXESS Pte.Ltd.), 3% of substitute type synthetic tanning agent JHY (Zhejiang, Heishi, leather chemical Co., Ltd.), 1% of dispersed tannin JOM (Zhejiang, Heishi, leather chemical Co., Ltd.), and rotating for 50 minutes; adding 0.5% of anion synthetic soft oil BSFR (Viffir International Co., Ltd.) and 1.5% of organic silicon fatting agent WP (Schmidt leather chemical materials Co., Ltd.), and rotating for 30 minutes; adding 3% tannin extract ME (Hua liter chemical Co., Ltd.), 3% amino resin retanning agent R7, 3% substitute type synthetic tanning agent JHY, 2% dye BLACK-NB, and rotating for 90 min; adding 2% acrylic resin tanning agent R35 (Shanghai Yaya industry Co., Ltd.) and 3% organosilicon polymer 5901 (ChengdouKate organosilicon New Material science and technology Co., Ltd.), and rotating for 60 min; adding 100% water (about 65 deg.C), and rotating for 20min to make the temperature in the drum reach 50 deg.C; adding 0.6% formic acid in 2 times, and rotating for 30 minutes; adding 0.1% of baking soda, and rotating for 20 minutes; adding 2% of anion synthetic soft oil BSFR, 2% of anion modified animal oil ZBN, 1% of lecithin BA, 3% of organic silicon fatting agent 2351 (Chengdou Kate organic silicon new material science and technology Co., Ltd.), 1% of vinyl polymer fatting agent and 0.1% of mildew preventive, and rotating for 50 min; adding 1.0% of acrylic resin tanning agent TP340 and 1.0% of acrylic resin tanning agent R83 (Toeplier leather chemical Co., Ltd.) and rotating for 30 minutes; adding 2.5% formic acid for 2 times, rotating for 20min each time, and discharging liquid; adding 300% water into the rotary drum, adjusting the temperature in the drum to 45 ℃, rotating for 10 minutes, and discharging liquid.
6. Color register: adding 200% of water into the rotary drum, adjusting the temperature in the drum to 45 ℃, adding 1.0% of dye, and rotating for 15 min; adding 1.0% formic acid, and rotating for 15 minutes; adding 0.5% of dye, and rotating for 10 minutes; adding 0.5% of metal tanning agent R104, and rotating for 20 minutes; adding 1.0% of cationic organosilicon polymer 4031 (Chengdou Kate organosilicon new material science and technology Co., Ltd.) and 0.5% of nonionic neat's foot oil (Shanghai Meya industry Co., Ltd.), rotating for 15 minutes, and discharging liquid;
7. building and standing: adding 300% of normal temperature water into the rotary drum, rotating for 10 minutes to ensure that the temperature in the drum is below 40 ℃, taking out the drum, and standing.
In conclusion, the leather making method by step fatliquoring reduces the dosage of the fatliquoring agent (the total dosage of the fatliquoring agent is about 10 percent) under the condition of ensuring that the leather quality is not reduced, and saves the material cost; by adopting a step-by-step greasing method, the produced leather has no greasy feeling and no oil cream phenomenon on the surface, and the stability of the product quality is improved; because the vinyl polymer fatting agent and the organic silicon polymer are used, the produced leather has better waterproof and antifouling capabilities, the dynamic waterproof can reach more than 5000 times, and the antifouling capability is superior to that of the leather produced by the conventional process; the plumpness and the softness of the leather are superior to those of the leather produced by adopting a conventional greasing method; meanwhile, the absorption rate of the fatting agent is improved, the content of organic matters in the tanning waste liquid is reduced, and the cost for treating the tanning waste water is reduced.
The above description is only an embodiment utilizing the technical content of the present disclosure, and any modification and variation made by those skilled in the art can be covered by the claims of the present disclosure, and not limited to the embodiments disclosed.
Claims (5)
1. A step-by-step greasing leather making method is characterized by sequentially comprising the following procedures of wringing and shaving wet blue leather, weighing → softening → retanning → neutralization → filling dyeing → topping → setting aside;
adding a synthetic fat liquor and a vinyl polymer fat liquor in the softening process, wherein the synthetic fat liquor added in the softening process is a nonionic synthetic fat liquor or an anionic synthetic fat liquor;
in the retanning procedure, an anionic synthetic fatliquor and an organic silicon polymer are also added;
in the neutralization process, a natural phospholipid fatliquor and a vinyl polymer fatliquor are also added;
modified animal oil, anion synthetic fat liquor, organic silicon polymer, organic silicon fat liquor and vinyl polymer fat liquor are added in the filling and dyeing process;
adding a cationic organic silicon polymer and a nonionic fatting agent in the color registering process;
determining the dosage of a reagent according to the quality of the shaved wet blue leather, wherein the softening process comprises the following steps: adding 200% of water into the rotary drum, adjusting the temperature in the drum to 40 ℃, adding 0.5-1.0% of nonionic synthetic oil or anionic synthetic oil, adding 0.5-2.0% of vinyl polymer fatliquor, and rotating for 30-60 minutes; adding 0.3-1.0% organic acid, rotating for 60-90 min, controlling pH value of bath liquid at 3.0-3.3, and discharging liquid;
the retanning procedure comprises the following steps: adding 100% of water into the rotary drum, adjusting the temperature in the drum to 35 ℃, adding 0.8-1.2% of anion synthetic oil and 1-2.5% of fatty aldehyde, and rotating for 30 minutes; adding 1-2% of amphoteric polymer and 1-2% of organic silicon polymer, and rotating for 40-60 minutes; adding 3-5% of chromium-containing material and 2-3% of protein filler, and rotating for 90-120 minutes; then adding 1-2% sodium formate, rotating for 20 minutes, adding 0.3-0.8% baking soda, and rotating for 30-60 minutes; controlling the pH value of the bath solution to be 3.9-4.1, stopping the bath solution for 180-300 minutes in a mode of rotating for 3 minutes and stopping the bath solution for 33 minutes, and discharging the liquid;
the neutralization process comprises the following steps: adding 100% of water into the rotary drum, adjusting the temperature in the drum to 33 ℃, adding 0.5-1.0% of natural phospholipid and 3% of buffer type neutralizing agent, and rotating for 30 minutes; adding 0.3% -0.8% sodium bicarbonate, rotating for 30min, and controlling bath liquid pH at 4.8-5.0; then 3% -5% of acrylic resin tanning agent and 2% -4% of vinyl polymer fatting agent are added, the mixture is rotated for 60-90 minutes, and liquid is discharged; washing with water and discharging liquid;
the filling and dyeing process comprises the following steps: adding 50% of water into the rotary drum, adjusting the temperature in the drum to 33 ℃, adding 0.5% -1.0% of anion modified animal oil and 1.0% -2.5% of vinyl polymer fatliquor, and rotating for 30-60 minutes; adding 3-5% of plant tanning agent, 2-4% of amino resin tanning agent, 3-5% of substitute type synthetic tanning agent and 0.5-1.5% of auxiliary type synthetic tanning agent, and rotating for 40-60 minutes; adding 0.5-1.0% of anion synthetic oil and 1.0-3% of organic silicon fatting agent, and rotating for 30-50 minutes; adding 3-5% of plant tanning agent, 2-4% of amino resin tanning agent, 3-5% of substitute type synthetic tanning agent and 1.5-3.5% of dye, and rotating for 60-120 minutes; adding 1-3% of acrylic resin tanning agent and 2-4% of organic silicon polymer, and rotating for 60-90 minutes; after water replenishing, temperature rising and formic acid adding for fixation, the pH value of the bath liquid is controlled to be 4.3-4.5; adding 0.1% -0.15% of baking soda, and rotating for 20 minutes; adding 1-3% of anion synthetic oil, 1-3% of anion modified animal oil, 1-2% of lecithin, 3-5% of organic silicon fatting agent and vinyl polymer fatting agent, 0.1-0.2% of mildew preventive, and rotating for 40-60 minutes; adding 1-3% of acrylic resin tanning agent, and rotating for 30-60 minutes; after formic acid is added for fixation, the pH value of bath liquid is controlled to be 3.4-3.6, and liquid is discharged; washing with water and discharging liquid;
the color register process comprises the following steps: adding 200% of water into a rotary drum, adjusting the temperature in the drum to be 45 ℃, adding 0.5% -1.5% of dye, rotating for 10-20 minutes, adding 0.5% -1.0% of formic acid, rotating for 10-20 minutes, adding 0.1% -1% of dye, rotating for 10-15 minutes, adding 0.5% -1.0% of formic acid, rotating for 10-20 minutes, adding 0.5% -1% of metal tanning agent, rotating for 20-25 minutes, and finishing color registering; then adding 0.5-1.5% of cationic polyurethane organic silicon polymer and 0.5-1.0% of nonionic oil, rotating for 10-20 minutes, and discharging liquid; washing with water and discharging liquid.
2. A method of step-and-fat tanning according to claim 1, characterized in that: the organic silicon polymer is one of amphoteric organic silicon polymer and cationic organic silicon polymer.
3. A method of step-and-fat tanning according to claim 1, characterized in that: the organic silicon fatting agent is one of polyether type organic silicon fatting agent and amino type organic silicon fatting agent.
4. A method of step-and-fat tanning according to claim 1, characterized in that: the cationic organosilicon polymer is one of cationic polyurethane organosilicon polymer and cationic polyacrylate organosilicon polymer.
5. A method of step-fatliquoring leather as claimed in claim 4, wherein: the amphoteric polymer is one of amphoteric acrylic resin and amphoteric melamine resin.
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| CN101798605A (en) * | 2010-03-16 | 2010-08-11 | 浙江通天星集团股份有限公司 | Energy saving and emission reduction method for retanning and dyeing high-strength cow split leather furniture |
| CN102676710A (en) * | 2012-05-29 | 2012-09-19 | 济南鲁日钧达皮革有限公司 | Method for preparing cleaned three-proofing cow split leather and prepared cleaned three-proofing cow split leather |
| CN105624343A (en) * | 2016-03-29 | 2016-06-01 | 兴业皮革科技股份有限公司 | Production technique for improving tearing strength of nappa shoe upper leather |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798605A (en) * | 2010-03-16 | 2010-08-11 | 浙江通天星集团股份有限公司 | Energy saving and emission reduction method for retanning and dyeing high-strength cow split leather furniture |
| CN102676710A (en) * | 2012-05-29 | 2012-09-19 | 济南鲁日钧达皮革有限公司 | Method for preparing cleaned three-proofing cow split leather and prepared cleaned three-proofing cow split leather |
| CN105624343A (en) * | 2016-03-29 | 2016-06-01 | 兴业皮革科技股份有限公司 | Production technique for improving tearing strength of nappa shoe upper leather |
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