CN113584238A - Preparation method of environment-friendly cow leather mat leather - Google Patents
Preparation method of environment-friendly cow leather mat leather Download PDFInfo
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- CN113584238A CN113584238A CN202110721746.1A CN202110721746A CN113584238A CN 113584238 A CN113584238 A CN 113584238A CN 202110721746 A CN202110721746 A CN 202110721746A CN 113584238 A CN113584238 A CN 113584238A
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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
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/28—Multi-step processes
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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
- C14C1/00—Chemical treatment prior to tanning
- C14C1/08—Deliming; Bating; Pickling; Degreasing
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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
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/04—Mineral tanning
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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
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/08—Chemical tanning by organic agents
- C14C3/10—Vegetable tanning
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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
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/08—Chemical tanning by organic agents
- C14C3/22—Chemical tanning by organic agents using polymerisation products
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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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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention discloses a preparation method of environment-friendly cow leather mat leather, which comprises the following steps: deliming and softening the bare skin to prepare delimed and softened skin; putting the delimed and softened leather into a rotary drum, adding water and NaCl into the rotary drum, then rotating for 10-20min, adding industrial sulfuric acid, then rotating for 120-180min, discharging partial acid liquid, adding a zirconium tanning agent and ethylene diamine tetraacetic acid, then rotating for 90min, then adding the zirconium tanning agent and the ethylene diamine tetraacetic acid again, and continuing rotating for 180 min; adding sodium bicarbonate solution, rotating for 120-180min, adding water to control the temperature in the rotary drum at 38-40 ℃, continuing rotating for 120-180min, and standing for 12 h; draining water in the drum, adding normal temperature water, rotating for 5-10min, taking out, standing, adding water, shaving, and weighing to obtain the embryo. The invention can reduce the production cost of the environment-friendly cow leather mat leather.
Description
Technical Field
The invention relates to the technical field of cow leather mat leather, in particular to a preparation method of environment-friendly cow leather mat leather.
Background
In the existing production process of the cow leather mat, materials containing chromium and titanium are often required to be used for producing and processing the cow leather mat, the cow leather mat prepared by heavy metal materials containing chromium, titanium and the like has the harm to the environment and human bodies in the using process due to the heavy metal residues, and the process is complex in the whole production process and the production cost is high.
Disclosure of Invention
The invention provides a preparation method of environment-friendly cow leather mat, which can reduce the production cost of the environment-friendly cow leather mat and can produce and prepare cleaner and more environment-friendly cow leather mat.
In order to solve the technical problem, the invention provides a preparation method of environment-friendly cow leather mat leather, which comprises the following steps:
step S1: deliming and softening the bare skin to prepare delimed and softened skin;
step S2: putting the delimed and softened leather into a rotary drum, adding water and NaCl into the rotary drum, then rotating for 10-20min, adding industrial sulfuric acid, then rotating for 120-180min, discharging partial acid liquid, adding a zirconium tanning agent and ethylene diamine tetraacetic acid, then rotating for 90min, then adding the zirconium tanning agent and the ethylene diamine tetraacetic acid again, and continuing rotating for 180 min;
step S3: adding sodium bicarbonate solution, rotating for 120-180min, adding water to control the temperature in the rotary drum at 38-40 ℃, continuing rotating for 120-180min, and standing for 12 h;
step S4: draining water in the drum, adding normal temperature water, rotating for 5-10min, taking out, standing, adding water, shaving, and weighing to obtain a blank;
step S5: putting the skin embryo into a rotary drum, adding water, NaCl, a rewetting agent and formic acid into the rotary drum, rotating for 120-180min, draining, adding normal-temperature water into drained water, rotating for 10min, and draining again;
step S6: adding water and a zirconium tanning agent into the rotary drum, rotating for 180min, then adding baking soda in batches, continuing to rotate for 120min, draining water, continuing to add water, neutralized tannin, ethylene diamine tetraacetic acid and baking soda, rotating for 120-180min, draining water, adding normal temperature water, rotating for 10-15min, and draining water for treatment;
step S7: adding water and acrylic resin retanning agent, rotating for 120min, adding tannin extract and sulfonated synthetic fatliquor, continuing rotating for 60-90min, adding tannin extract, sulfonated synthetic fatliquor and low-formaldehyde amino resin retanning agent, rotating for 180min, automatically emptying for 12 hours by rotating for 5 minutes per hour, and rotating for 60min to check the cross section of the skin until the tannin extract is completely penetrated;
step S8: adding water, rotating for 10min, adding fatting agent, rotating for 120-180min, adding formic acid in batches, rotating for 60-90min, washing with water, cooling, taking out, and standing for 12 h;
step S9: stretching, wet toggling drying, moisture regaining, rolling and dry toggling are carried out, and then the environment-friendly cow leather mat leather is prepared through finishing.
Preferably, in the step S2, the temperature of the water added into the rotary drum is 8-20 c, the weight of the water is 80 to 100 percent relative to the weight of the pelts, the weight of the added NaCl is 7 to 8 percent relative to the weight of the pelts, controlling the baume degree Be to Be 7-8 before adding the industrial sulfuric acid, controlling the weight of the added industrial sulfuric acid to Be 1-1.5 percent relative to the weight of the pelts, controlling the pH value to Be 1.0-1.2 after adding the industrial sulfuric acid, discharging part of acid liquor which is 30-50 percent of the volume of the discharged acid liquor, before 90min rotation, the weight of the added zirconium tanning agent is 3% relative to the weight of the pelts, the weight of the added ethylene diamine tetraacetic acid is 0.1% relative to the weight of the pelts, after 90min rotation, the weight of zirconium tanning agent added was 4% with respect to the weight of the pelts and the weight of ethylenediaminetetraacetic acid added was 0.1% with respect to the weight of the pelts.
Preferably, in the step S2, the zirconia content in the zirconium tanning agent is 33%.
Preferably, in the step S2, the industrial sulfuric acid is added in four times, each time with an interval of 20min, and after rotating for 120-180min, the skin is inspected for cross section with bromocresol green until full penetration.
Preferably, in the step S3, the pH value is adjusted to 3.5-3.6 after adding the baking soda solution, the temperature of the added water is 38-40 ℃, and the weight of the added water is 100-150% relative to the weight of the pelts.
Preferably, in the step S4, the weight of the water at normal temperature added is 180-200% of the weight of the pelts.
Preferably, in the step S3, the baking soda solution is 10 wt%, and the baking soda solution is added in multiple times, each time interval is 20-25min, and each time addition is 0.2-0.25% by volume.
Preferably, in the step S5, the temperature of the added water is 38-40 ℃, and the weight of the added water, NaCl, the moisture regaining agent and formic acid is 180-200%, 3-4%, 3-0.5% and 0.3-0.5% respectively relative to the weight of the skin germ.
Preferably, in the step S6, before the rotation for 180min, the temperature of the added water is 30-35 ℃, the weight of the added water and the zirconium tanning agent is 80% -100% and 3% -4% relative to the weight of the leather embryo, after the rotation for 180min and before the rotation for 120min, the weight of the added baking soda is 0.08% relative to the weight of the leather embryo, the pH is adjusted to be 3.5-3.6, after the rotation for 120min and before the rotation for 120min, the temperature of the added water is 33-35 ℃, the weight of the added water, the neutralized tannin, the ethylene diamine tetraacetic acid and the baking soda is 150% -200%, 3% -4%, 0.1% and 0.6% -0.8% relative to the weight of the leather embryo, the pH of the solution is controlled to be 4.5-4.7, and after the rotation for 120min, the weight of the added normal temperature water is 150% -200% relative to the weight of the leather embryo, in step S7, the warmth of the added water is 28-30 ℃ before rotating for 60-90min, the weight of the added water, the weight of the added acrylic resin retanning agent, the weight of the added tannin extract and the sulfonated synthetic fatliquor are respectively 50-80%, 3-4%, 10-15% and 0.8-1.0% relative to the weight of the leather body, and the weight loudness of the added tannin extract, the sulfonated synthetic fatliquor and the low formaldehyde amino resin retanning agent and the weight of the leather body are respectively 10-15%, 0.8-1.0% and 3-5% after rotating for 60-90 min.
Preferably, in the step S8, the temperature of the added water is 55-60 ℃, the weight of the added water, the fatting agent and the formic acid is 100-150%, 15-18% and 1.0-1.5% respectively relative to the weight of the skin blank, the pH of the solution is controlled to be 3.7-3.8 after the formic acid is added, the fatting agent is a comprehensive fatting agent, an osmotic fatting agent or a sulfonated synthetic fatting agent, and in the step S1-S4, the rotating speed of the rotary drum is 8-10 rpm; in steps S5-S8, the rotating drum rotating speed is 12-13 rpm.
The invention provides a preparation method of environment-friendly cow leather mat, which has the advantages that the whole production process is simple, the production cost can be greatly saved, in addition, heavy metal materials are not used in the production process, so the produced cow leather mat has the characteristics of cleanness and environment protection, and the harm to the environment and human bodies can be avoided.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
a production method for preparing environment-friendly cow leather mat leather based on zirconium tanning agent and tannin extract comprises the following steps:
s1, deliming and softening skin: preparing delimed and softened skin by a conventional method, weighing the weight of the pelts before delimed and softened, wherein the weight of a reagent used in the subsequent treatment process steps is calculated according to the weight percentage;
s2, pickling, and chrome-free tanning: measuring 18 ℃ and 80% of water and 7% of NaCl (conventional industrial salt) in a rotary drum, rotating for 10min, controlling the Baume Be to Be 7, adding 1% of industrial sulfuric acid (added in four times with the interval time of 20min each time), rotating for 120min, controlling the pH to Be 1.0, and checking the transverse section of the skin by bromocresol green to require full penetration; draining 30% acid solution, adding 3% ZB33-N (ZrO2 content is 33%), 0.1% EDTA, rotating for 90min, adding 4% ZB33-N, 0.1% EDTA, and rotating for 180 min;
s3, extracting alkali and heating: slowly adding 10% sodium bicarbonate (conventional industrial sodium bicarbonate, added in batches, each time is 0.2% by volume, each time interval is 20min) solution into S3, adjusting pH to 3.5, and rotating for 120 min; then adding 100% water to control the internal temperature of the rotary drum at 38 ℃, continuously rotating for 120min, and standing for 12 h;
s4, washing: draining water in the S3 drum, adding 180% of normal temperature water, rotating for 5min, taking out the drum, standing, adding water, shaving, and weighing, wherein the amount of the subsequent reagent is calculated according to the weight percentage of the shaved skin embryo;
s5, rinsing: adding 180% water, 3% NaCl, 0.3% humectant (BAYMOL AN2-C) and 0.3% formic acid (conventional industrial formic acid) into the drum at 38 deg.C, rotating for 120min, and controlling pH to 1.8 after rinsing; draining off water, adding 300% of normal temperature water, rotating for 10min, and draining off water again;
s6, retanning, alkali extraction, neutralization and water washing: adding 80% of water at 30 ℃ into the rotary drum and 3% of ZB33-N into the rotary drum, rotating for 180min, adding 0.08% of baking soda in batches (diluting with normal-temperature water for 10 times, adding for 4 times at intervals of 20min), adjusting the pH to 3.5, continuously rotating for 120min, and draining water; continuously adding water at 33 deg.C and 150%, 3% neutral tannin (TANIGAN PAK-S, quality score of 95% manufactured by Langshan chemical Co., Ltd.), 0.1% ethylenediamine tetraacetic acid, 0.6% sodium bicarbonate, rotating for 120min, and controlling pH of the solution to 4.5; draining off water, adding 150% of normal temperature water, rotating for 10min, and draining off water;
s7, tannin extract retanning: after S6, add 28 deg.C, 50% water, 3% acrylic resin retanning agent ((R))Hong KongUPRET R131 of Yoppon Co., Ltd, 32% by mass, rotating for 120min, adding 10% tannin extract (SETA TUN of SETA Co., 72.5% by mass), 0.8% sulfosynthetic fatliquor (IDEFAT F-8 of Eder technology, 58% by mass), rotating for 60min, adding 10% tannin extract, 0.8% sulfosynthetic fatliquor, and mixingAcidifying synthetic fat-liquoring agent, rotating for 180min after 3% low formaldehyde amino resin retanning agent (BROTAN CPR of Brother science and technology Co., Ltd., mass value of 92%), rotating for 5min per hour, automatically emptying for 12 hours, rotating for 60min per hour, checking the cross section of the skin, and requiring complete core penetration of tannin extract;
s8, fat liquoring: adding 100% water at 55 deg.C into S7, rotating for 10min, and adding 15% fat-liquoring agentHong Kong5 percent of UPFAT F505 comprehensive fat liquor with mass score of 55 percent of Yoppen company Limited,Hong Kong5 percent of UPFAT F506 permeable fat liquor with the mass score of 60 percent of Yoppen Co., Ltd and 5 percent of IDEFAT F-8 sulfosynthesis fat liquor with the mass score of 58 percent of Edel technology), then rotating for 180min for 120 times, then adding 1.0 percent formic acid into 3 batches of batches (each time at an interval of 30min) and then rotating for 60min, and controlling the pH value of the solution to be 3.7; cooling by washing, discharging from the drum, and standing for 12 h;
s9, stretching, drying by a wet toggling, dampening, breaking and drying by a dry toggling are carried out after S8; and finishing according to a conventional process.
In steps S1-S4, the rotating drum rotating speed is 8 rpm; in steps S5-S8, the drum rotation speed is 12 rpm.
Example 2:
a production method for preparing environment-friendly cow leather mat leather based on zirconium tanning agent and tannin extract comprises the following steps:
s1, deliming and softening skin: preparing delimed and softened skin by a conventional method, weighing the weight of the pelts before delimed and softened, wherein the weight of a reagent used in the subsequent treatment process steps is calculated according to the weight percentage;
s2, pickling, and chrome-free tanning: measuring 19 ℃ and 90% of water and 7.5% of NaCl (conventional industrial salt) in a rotary drum, rotating for 15min, controlling the Baume Be to Be 7.5, adding 1.2% of industrial sulfuric acid (added in four times with the interval time of 20min each time), rotating for 150min, controlling the pH to Be 1.1, and checking the transverse section of the skin by bromocresol green to require full penetration; draining 40% acid solution, adding 3% ZB33-N (ZrO2 content is 33%), 0.1% EDTA, rotating for 90min, adding 4% ZB33-N, 0.1% EDTA, and rotating for 180 min;
s3, extracting alkali and heating: slowly adding 10% baking soda (conventional industrial baking soda, added in batches, each time is 0.22% volume percentage, each time interval is 22min) solution into S3, adjusting pH to 3.55, and rotating for 150 min; then adding 125% water to control the internal temperature of the rotary drum at 39 ℃, continuing rotating for 150min, and standing for 12 h;
s4, washing: draining water in the S3 rotary drum, adding 190% of normal temperature water, rotating for 8min, taking out the rotary drum, standing, adding water, shaving, and weighing, wherein the dosage of the subsequent reagent is calculated according to the weight percentage of the shaved skin embryo;
s5, rinsing: adding 190% water, 3.5% NaCl, 0.4% humectant (BAYMOL AN2-C) and 0.4% formic acid (conventional industrial formic acid) into the rotary drum at 39 deg.C, rotating for 150min, and controlling pH to 1.9 after rinsing; draining off water, adding 300% of normal temperature water, rotating for 10min, and draining off water again;
s6, retanning, alkali extraction, neutralization and water washing: adding water at 33 ℃ and 90% into the rotary drum, rotating for 180min after adding ZB33-N at 3.5% into the rotary drum S5, then adding 0.08% baking soda in batches (diluting with normal temperature water for 10 times, adding the water for 4 times at intervals of 20min), adjusting the pH to 3.55, continuing rotating for 120min, and draining the water; continuously adding water of 180% at 34 deg.C, 3.5% of neutral tannin (TANIGAN PAK-S, quality score of 95% manufactured by Langshan chemical company, Ltd.), 0.1% of ethylenediamine tetraacetic acid and 0.7% of baking soda, rotating for 150min, and controlling pH of the solution to 4.6; draining off water, adding 180% of normal temperature water, rotating for 12min, and draining off water;
s7, tannin extract retanning: after S6, 29 ℃ C, 65% water, 3.5% acrylic resin retanning agent (S) ((R))Hong KongUPRET R131 of Yoppon Co., Ltd, 32% by mass, rotating for 120min, adding 12% tannin extract (SETA TUN of SETA Co., 72.5% by mass), 0.9% sulfonated synthetic fatting agent (IDEFAT F-8 of Eder technology, 58% by mass), rotating for 75min, adding 12% tannin extract, 0.9% sulfonated synthetic fatting agent, and 4% low formaldehyde amino resin retanning agent (BROTAN CPR of Brother science Co., Ltd, 92% by mass), rotating for 180min, and rotating for 5min per hourRotating for 60min after 12 hours when the machine is empty to check the cross section of the skin, wherein the tannin extract is required to be completely penetrated;
s8, fat liquoring: adding 130% water at 58 deg.C, rotating for 10min, and adding 16% fat-liquoring agent (S) (7)Hong Kong5.5 percent of UPFAT F505 comprehensive fat liquor with the mass score of 55 percent of Yoppen company Limited,Hong Kong5.5 percent of UPFAT F506 penetration type fat liquor with the mass score of 60 percent of Yoppen Co., Ltd and 5.5 percent of IDEFAT F-8 sulfosynthesis fat liquor with the mass score of 58 percent of Edger technology), then rotating for 150min, then adding 1.2 percent of formic acid into 3 batches of the fat liquor (with the interval of 30min each time), then rotating for 75min, and controlling the pH value of the solution to be 3.75; cooling by washing, discharging from the drum, and standing for 12 h;
s9, stretching, drying by a wet toggling, dampening, breaking and drying by a dry toggling are carried out after S8; and finishing according to a conventional process.
In steps S1-S4, the rotating drum rotating speed is 9 rpm; in steps S5-S8, the drum rotation speed is 12.5 rpm.
Example 3:
a production method for preparing environment-friendly cow leather mat leather based on zirconium tanning agent and tannin extract comprises the following steps:
s1, deliming and softening skin: preparing delimed and softened skin by a conventional method, weighing the weight of the pelts before delimed and softened, wherein the weight of a reagent used in the subsequent treatment process steps is calculated according to the weight percentage;
s2, pickling, and chrome-free tanning: measuring 20 ℃ of 100 percent water and 8 percent NaCl (conventional industrial salt) in a rotary drum, rotating for 20min, controlling the Baume Be to Be 8, adding 1.5 percent industrial sulfuric acid (added in four times with the interval time of 20min each time), rotating for 180min, controlling the pH to Be 1.2, and checking the transverse section of the skin by bromocresol green to require full penetration; draining 50% acid solution, adding 3% ZB33-N (ZrO2 content is 33%), 0.1% EDTA, rotating for 90min, adding 4% ZB33-N, 0.1% EDTA, and rotating for 180 min;
s3, extracting alkali and heating: slowly adding 10% baking soda (conventional industrial baking soda, added in batches, each time is 0.25% volume percentage, each time interval is 25min) solution into S3, adjusting pH to 3.6, and rotating for 180 min; then adding 150% of water to control the temperature in the rotary drum to be 40 ℃, continuously rotating for 180min, and standing for 12 h;
s4, washing: draining water in the S3 rotary drum, adding 200% of normal temperature water, rotating for 10min, taking out the rotary drum, standing, adding water, shaving, and weighing, wherein the dosage of the subsequent reagent is calculated according to the weight percentage of the shaved skin embryo;
s5, rinsing: adding 200% water, 4% NaCl, 0.5% humectant (BAYMOL AN2-C) and 0.5% formic acid (conventional industrial formic acid) into the rotary drum at 40 deg.C, rotating for 180min, and controlling pH to 2.0 after rinsing; draining off water, adding 300% of normal temperature water, rotating for 10min, and draining off water again;
s6, retanning, alkali extraction, neutralization and water washing: adding 100% water at 35 deg.C into the rotary drum, rotating for 180min after 4% ZB33-N, adding 0.08% sodium bicarbonate (diluted 10 times with normal temperature water, adding for 4 times at intervals of 20min), adjusting pH to 3.6, rotating for 120min, and draining water; continuously adding water at 35 deg.C and 200%, 4% neutral tannin (TANIGAN PAK-S, quality score of 95% manufactured by Langshan chemical Co., Ltd.), 0.1% ethylenediamine tetraacetic acid, 0.8% sodium bicarbonate, rotating for 180min, and controlling pH of the solution to 4.7; draining water, adding 200% of normal temperature water, rotating for 15min, and draining;
s7, tannin extract retanning: after S6, 30 ℃ water 80%, acrylic resin retanning agent 4%Hong KongUPRETR131 of Yoppon Limited company, with a mass value of 32%), rotating for 120min, then adding 15% tannin extract (SEATATUN of SEA, with a mass value of 72.5%), 1.0% sulfonated synthetic fatting agent (IDEFATF-8 of Eder technology, with a mass value of 58%), continuing rotating for 90min, then adding 15% tannin extract, 1.0% sulfonated synthetic fatting agent, 5% low formaldehyde amino resin retanning agent (BROTANCPR of Brother technology Limited company, with a mass value of 92%), rotating for 180min, and then rotating for 5 minutes per hour, automatically emptying for 12 hours, and then rotating for 60min to check the cross section of the skin, which requires the complete core penetration of the tannin extract;
s8, fat liquoring: adding 150% water at 60 deg.C into S7, rotating for 10min, and adding 18%Fatting agent (A)Hong Kong6 percent of UPFAT F505 comprehensive fat liquor with the mass score of 55 percent of Yoppen company Limited,Hong KongUPFAT F506 penetration type fat liquor with 60% of UPPER GmbH mass score 6%, IDEFAT F-8 sulfosynthesis fat liquor with 58% of Edier technology mass score 6%), rotating for 180min, adding 1.5% formic acid in 3 batches (each time interval is 30min), rotating for 90min, and controlling the pH of the solution to be 3.8; cooling by washing, discharging from the drum, and standing for 12 h;
s9, stretching, drying by a wet toggling, dampening, breaking and drying by a dry toggling are carried out after S8; and finishing according to a conventional process.
In steps S1-S4, the rotating drum rotating speed is 10 rpm; in steps S5-S8, the drum rotation speed is 13 rpm.
The products obtained in the comparative example and the example are detected, and the specific test results are shown in the following tables 1 and 2 according to GB 20400-2006 leather and fur harmful substance limit and QB/T4204-2011-leather summer sleeping mat, and the comparative example product in the example is a qualified leather summer sleeping mat meeting the standard in the procurement market.
TABLE 1 EXAMPLES 1-3 AND COMPARATIVE EXAMPLE Property tables
TABLE 2 test results of the content of metallic elements
According to the production method for preparing the environment-friendly cow leather mat by using the zirconium tanning agent and the tannin extract, the obtained cow leather mat leather has a fine and compact grain surface, a mat body is plump, soft and elastic, the contraction temperature of crust leather is higher than 80 ℃, and the air permeability and the sweat absorption are greatly improved compared with those of the traditional chrome tanning mat. All the physical and chemical properties meet the industrial requirements and have good subsequent processing performance.
In the production process, the whole American bull (cattle hide) can be selected without a seam, and the edge covering is formed by bonding and splicing thin sheets made of the same leather material, so that the edge covering is smooth, round and bright, and has no hair corners and concave-convex feeling. High-quality leather is finely selected, and the leather is tanned by using imported plant dyes, has consistent color and luster in front and back, is vivid and natural, and does not irritate the skin. On the basis of the process of tanning by the environment-friendly dye, a micro-spraying digital printing process and a logo all-copper stamping process are also used for printing the local part (the part of the spliced corner of the bottom is 50-60cm away from the bottom) on the surface of the leather, and the sample prepared by the embodiment passes the national light industry shoe leather fur quality supervision and detection and passes the superior product standard.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The preparation method of the environment-friendly cow leather mat is characterized by comprising the following steps:
step S1: deliming and softening the bare skin to prepare delimed and softened skin;
step S2: putting the delimed and softened leather into a rotary drum, adding water and NaCl into the rotary drum, then rotating for 10-20min, adding industrial sulfuric acid, then rotating for 120-180min, discharging partial acid liquid, adding a zirconium tanning agent and ethylene diamine tetraacetic acid, then rotating for 90min, then adding the zirconium tanning agent and the ethylene diamine tetraacetic acid again, and continuing rotating for 180 min;
step S3: adding sodium bicarbonate solution, rotating for 120-180min, adding water to control the temperature in the rotary drum at 38-40 ℃, continuing rotating for 120-180min, and standing for 12 h;
step S4: draining water in the drum, adding normal temperature water, rotating for 5-10min, taking out, standing, adding water, shaving, and weighing to obtain a blank;
step S5: putting the skin embryo into a rotary drum, adding water, NaCl, a rewetting agent and formic acid into the rotary drum, rotating for 120-180min, draining, adding normal-temperature water into drained water, rotating for 10min, and draining again;
step S6: adding water and a zirconium tanning agent into the rotary drum, rotating for 180min, then adding baking soda in batches, continuing to rotate for 120min, draining water, continuing to add water, neutralized tannin, ethylene diamine tetraacetic acid and baking soda, rotating for 120-180min, draining water, adding normal temperature water, rotating for 10-15min, and draining water for treatment;
step S7: adding water and acrylic resin retanning agent, rotating for 120min, adding tannin extract and sulfonated synthetic fatliquor, continuing rotating for 60-90min, adding tannin extract, sulfonated synthetic fatliquor and low-formaldehyde amino resin retanning agent, rotating for 180min, automatically emptying for 12 hours by rotating for 5 minutes per hour, and rotating for 60min to check the cross section of the skin until the tannin extract is completely penetrated;
step S8: adding water, rotating for 10min, adding fatting agent, rotating for 120-180min, adding formic acid in batches, rotating for 60-90min, washing with water, cooling, taking out, and standing for 12 h;
step S9: stretching, wet toggling drying, moisture regaining, rolling and dry toggling are carried out, and then the environment-friendly cow leather mat leather is prepared through finishing.
2. The method of claim 1, wherein in the step S2, the temperature of water added to the drum is 8-20 ℃, the weight of water is 80-100% of the weight of the pelts, the weight of NaCl added is 7-8% of the weight of the pelts, the baume degree Be is controlled to Be 7-8 before the industrial sulfuric acid is added, the weight of the industrial sulfuric acid is 1-1.5% of the weight of the pelts, the pH value is controlled to Be 1.0-1.2 after the industrial sulfuric acid is added, the acid liquor is partially discharged to Be 30-50% of the acid liquor by volume, the weight of the zirconium tanning agent added is 3% of the weight of the pelts before 90min rotation, the weight of the ethylenediamine tetraacetic acid added is 0.1% of the weight of the pelts, the weight of the zirconium tanning agent added is 4% of the weight of the pelts after 90min rotation, the weight of added ethylenediaminetetraacetic acid was 0.1% relative to the weight of pelts.
3. The method according to claim 1, wherein the zirconia content in the zirconium tanning agent in the step S2 is 33%.
4. The method as claimed in claim 1, wherein the industrial sulfuric acid is added in four times in step S2, each time at intervals of 20min, and the skin is inspected for cross section with bromocresol green after rotating for 120-180min until full penetration.
5. The method of claim 1, wherein in the step S3, the pH value is adjusted to 3.5-3.6 after adding the baking soda solution, the temperature of the added water is 38-40 ℃, and the weight of the added water is 100-150% of the weight of the pelts.
6. The method for preparing the dried skin according to claim 1, wherein the weight of the water at normal temperature added in the step S4 is 180-200% relative to the weight of the dried skin.
7. The method as claimed in claim 1, wherein in step S3, the baking soda solution is added in 10 wt% in multiple portions with an interval of 20-25min, and the amount of each addition is 0.2-0.25 vol%.
8. The method according to claim 1, wherein the temperature of the added water is 38-40 ℃ and the weight of the added water, NaCl, moisture regaining agent and formic acid is 180-200%, 3-4%, 3-0.5% and 0.3-0.5% respectively relative to the weight of the germ in step S5.
9. The method as claimed in claim 1, wherein in the step S6, the temperature of the added water is 30-35 ℃ before the rotation for 180min, the weight of the added water and the zirconium tanning agent is 80% -100% and 3% -4% with respect to the weight of the skin germ, the weight of the added sodium bicarbonate is 0.08% with respect to the weight of the skin germ after the rotation for 180min and before the rotation for 120min, the pH is adjusted to 3.5-3.6, the temperature of the added water is 33-35 ℃ after the rotation for 120min and before the rotation for 120-180min, the weight of the added water, the neutralized tannin, the ethylenediaminetetraacetic acid and the sodium bicarbonate is 150% -200%, 3% -4%, 0.1% and 0.6% -0.8% with respect to the weight of the skin germ, respectively, and the pH of the solution is controlled to 4.5-4.7, after the rotation for 120-180min, the weight of the added water at normal temperature is 150-200% relative to the weight of the leather blank, in the step S7, the warmth of the added water is 28-30 ℃ before rotating for 60-90min, the weight of the added water, the weight of the added acrylic resin retanning agent, the weight of the added tannin extract and the weight of the added sulfonated synthetic fatliquor are 50-80%, 3-4%, 10-15% and 0.8-1.0% respectively relative to the weight of the leather blank, and the weight loudness of the added tannin extract, the sulfonated synthetic fatliquor and the low formaldehyde amino resin retanning agent and the weight of the leather blank are 10-15%, 0.8-1.0% and 3-5% respectively after rotating for 60-90 min.
10. The method according to claim 1, wherein in the step S8, the temperature of the added water is 55-60 ℃, the weight of the added water, the fatliquoring agent and the formic acid is 100% -150%, 15% -18% and 1.0% -1.5% relative to the weight of the skin germ, the pH of the solution is controlled to 3.7-3.8 after the formic acid is added, the fatliquoring agent is a comprehensive fatliquoring agent, an osmotic fatliquoring agent or a sulfonated synthetic fatliquoring agent, and in the steps S1-S4, the rotating speed of the rotating drum is 8-10 rpm; in steps S5-S8, the rotating drum rotating speed is 12-13 rpm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115404288A (en) * | 2022-08-31 | 2022-11-29 | 重庆犇牛皮业有限公司 | Production method for preparing buffalo mat based on no meat removal |
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| CN105219894A (en) * | 2015-05-05 | 2016-01-06 | 四川大学 | Zirconium-aluminum-titanium coordinate tanning agent tan high-grade ox summer sleeping mat leather |
| CN109439809A (en) * | 2018-11-21 | 2019-03-08 | 四川绵竹新市制革有限公司 | A kind of production method based on zirconium aluminium titanium complex and vegatable tannin preparation buffalo ecology summer sleeping mat leather |
| CN112226548A (en) * | 2020-09-04 | 2021-01-15 | 宜宾康信皮业工贸有限公司 | Production method for preparing ecological cow leather mat leather based on zirconium tanning agent and tannin extract |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105219894A (en) * | 2015-05-05 | 2016-01-06 | 四川大学 | Zirconium-aluminum-titanium coordinate tanning agent tan high-grade ox summer sleeping mat leather |
| CN109439809A (en) * | 2018-11-21 | 2019-03-08 | 四川绵竹新市制革有限公司 | A kind of production method based on zirconium aluminium titanium complex and vegatable tannin preparation buffalo ecology summer sleeping mat leather |
| CN112226548A (en) * | 2020-09-04 | 2021-01-15 | 宜宾康信皮业工贸有限公司 | Production method for preparing ecological cow leather mat leather based on zirconium tanning agent and tannin extract |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115404288A (en) * | 2022-08-31 | 2022-11-29 | 重庆犇牛皮业有限公司 | Production method for preparing buffalo mat based on no meat removal |
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