CN105039611A - Anti-static cattle hide upper leather and preparation method thereof - Google Patents
Anti-static cattle hide upper leather and preparation method thereof Download PDFInfo
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- CN105039611A CN105039611A CN201510395421.3A CN201510395421A CN105039611A CN 105039611 A CN105039611 A CN 105039611A CN 201510395421 A CN201510395421 A CN 201510395421A CN 105039611 A CN105039611 A CN 105039611A
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Abstract
The invention discloses anti-static cattle hide upper leather and a preparation method thereof. The process is conducted by the adoption of the combination method of wet dyeing and finishing anti-static treatment and dry finishing anti-static treatment; in the wet dyeing and finishing work section, 6.0% of anti-static agents are added for anti-static treatment after dyeing and fat-liquoring procedures, and a drum is stopped to stay the night; in the dry finishing coating procedure, conductive fillers are adopted to be doped in a coating material to conduct anti-static treatment on a coating. The physical and chemical property of the anti-static cattle hide upper leather manufactured through the technology can meet the national standard, the volume resistivity is 103 omega m, the number of flesh side adsorption paper pieces is four, and the anti-static grade is four.
Description
Technical field
The invention belongs to function leather technology field.
Background technology
Antistatic leather, also known as anti-electrostatic leather, refers to the leather with anti-static function.Electrostatic is a kind of electric energy being present in body surface, is a kind of phenomenon of the positive and negative charge unbalance rear generation in local.Electrostatic can bring certain harm to human body, have an impact also can to the Performance and quality of the product that electrostatic occurs, as the electrostatic in high-grade car and aircraft, in computer house not only can make operator get shocked, and the instrument in car or aircraft, telepilot etc. can be made malfunctioning, computer command system is out of control.In productive life, the use of leather and leather products is very general, can produce static hazard unavoidably in its use procedure, therefore, produces antistatic leather tool and is of great significance.
Usually, anlistatig method one is the oilness by increasing material surface, suppresses the generation of static charge; Two is make the static charge produced dredge as early as possible, leak by certain means.The method of leaking electrostatic mainly contains: improve the humidity of surrounding environment and increase the electric conductivity of material.Improve the electric conductivity of material be antistatic the most effectively, the most basic method, or electro-conductive material can be added improve materials conductive rate by surface modification.Zhang Fanghui etc. are to the leather after vacuum-drying, with aluminium film or silverskin that the method plating thickness of vacuum evaporation is 200-400nm, then, in certain vacuum, in leather, inject silver or aluminum ion by flesh side of a belt, be finally the layer/polyaniline conductive coating of micron number magnitude in applied thickness, obtained a kind of antistatic leather (Zhang Fanghui, Wang Xiufeng, Sun Lirong, etc. a kind of antistatic leather and preparation method thereof [P]. Chinese patent, 200610104967.X).Sun Lirong etc. show the influence research that chrome tanning, iron tannage, aldehyde tannage three kinds of process for tanning obtain pigskin finished leather specific conductivity, the specific conductivity of aldehyde tanned leather is maximum, the specific conductivity of iron tanned leather is taken second place, chrome-tanned specific conductivity is minimum, the pigskin finished leather of three kinds of process for tanning tannings all belongs to organic semiconductor material (Sun Lirong, Li Xuetian, Zhang Chuanbo. the impact [J] of Tanning Methods on Leather Electrical Conductivity. Chinese leather, 2008 (3): 14 ~ 15.).Up to now, the research to antistatic leather of China and even the world is still in the starting stage, also the product standard of not relevant antistatic leather, generally use the antistatic standard of textiles, the main test item as antistatic leather is static voltage transformation period, surface charge density and the quantity of electric charge etc.The present invention is according to electrostatic mechanism of production and the method eliminating electrostatic, by common retanning in research process hides, stuffing material on the impact of leather antistatic property, the method taking hygrometric state dyeing and finishing antistatic treatment to combine with dry state ornamenting antistatic treatment carries out antistatic treatment to wet blue leather, obtains the cattle hide upper leather that antistatic property is excellent.
Summary of the invention
The method that the present invention takes hygrometric state dyeing and finishing antistatic treatment to combine with dry state dyeing and finishing antistatic treatment is carried out, antistatic treatment can be carried out at filling work procedure and stop drum spending the night or the static inhibitor that adds 6.0% after dyeing and fat-liquoring carries out antistatic treatment antistatic treatment in hygrometric state dyeing and finishing, and stop drum and spend the night; Adopt conductive filler material to be doped in coated material in the covering with paint operation of dry state ornamenting and antistatic treatment is carried out to coating.
The preparation method of antistatic cattle hide upper leather described in the present invention, comprises the following steps:
1. hygrometric state dyeing and finishing antistatic treatment:
By wet blue water squeezing, shaving, wash, ease back, retanning, washing, filling, washing, neutralization, dyeing and fat-liquoring, washing, antistatic treatment, then stop that drum spends the night, goes out drum, water squeezing stretching, extension, vacuum-drying, moisture regain are shaken soft;
Wherein antistatic treatment is operating as: liquor ratio 1.5, and temperature 32 DEG C, static inhibitor 6.0%, turns 30min.The same common process of other techniques;
2. dry state ornamenting antistatic treatment: covering with paint adopts conductive filler material to be doped in coated material and processes coating, and concrete operations are: resist quiet slurry-top layer spraying-ironing-finished product through the crust leather-spray back cover agent-sprayed layer undercoat antistatic slurry-ironing-spraying middle level of hygrometric state dyeing and finishing antistatic treatment.
3. step described in 1. in antistatic treatment agent be: trimethyl-glycine, ethoxylated fat race alkylamine, any one in the derivative of cationic quaternary ammonium salt, sulfuric ester, phosphoric acid ester, polyoxyethylene glycol or amido Soxylat A 25-7.
4. step described in 2. in:
Agent of binding is made up of the raw material of following weight part: urethane resin 120, water 100, ethyl glycol 80;
Bottom spraying agent is made up of the raw material of following weight part: pigment paste 100, from plate wax 30, and synthesis resin 50, middle soft propene acid resin 130, middle flexible polyurethane 100, leather linking agent 5, water 200, static inhibitor 120;
Middle level spraying agent is made up of the raw material of following weight part: pigment paste 100, from plate wax 30, in hard acrylic resin 70, soft propene acid resin 50, middle soft propene acid resin 80, middle flexible polyurethane 140, leather linking agent 5, water 300, static inhibitor 120;
Top layer spraying agent is made up of the raw material of following weight part: nitro-cotton brightening agent 100, water 100;
In covering with paint formula, added electro-conductive material is: at least one of polyaniline (PAN), graphitized carbon black and nanometer silver.
5. the preparation method of antistatic cattle hide upper leather, concrete operations divide following steps:
(1) sampling is weighed, heavy according to 120% of wet blue leather;
(2) wash: liquor ratio 3.0, temperature normal temperature, vexed washing 2 times, each 5min, rotating speed 8-10rpm, control liquid;
(3) ease back: liquor ratio 2.0, Nei Wen establishes 32 DEG C, rotating speed 8-10rpm, adds formic acid, turns 40min, then surveys pH, then controls liquid;
(4) wash: liquor ratio 3.0, temperature normal temperature, vexed washing 2 times, each 5min, rotating speed 8-10rpm, control liquid;
(5) retanning: liquor ratio 1.5, interior temperature 32 DEG C, adds neutralizing retanning agent 3.0%, turns 30min, require pH>4.6, and anionic acrylic resin 6.0%, turns 40min, and aminoresin 6.0%, turns 40min;
(6) wash: liquor ratio 3.0, temperature normal temperature, vexed washing 2 times, each 5min, rotating speed 8-10rpm, control liquid;
(7) fill: liquor ratio 1.5, interior temperature 32 DEG C, adds synthetic compound tanning agent 10%, turns 30min; Add tannin extract 15% turn of 60min, add formic acid, turn 30min, then control liquid;
(8) neutralize: liquor ratio 1.5, interior temperature 32 DEG C, adds sodium formiate 0.8%, turns 20min; Add sodium bicarbonate 0.6%, turn 40min, survey pH, require pH=5.2-5.4, in and full impregnated, then control liquid;
(9) dyeing and fat-liquoring: liquor ratio 1.5, interior temperature 52-55 DEG C, adds black dyes 2.5%, osmosis type grease 5.0%, turns 60min, checks staining conditions, does not thoroughly continue to turn 40min; Add synthesis quasi-grease 4.0%, turn 60min; , divide and add formic acid 2 times, often turn 20min, survey pH, terminal pH and require about 4.0, then control liquid;
(10) wash: liquor ratio 3.0, temperature normal temperature, vexed washing 2 times, each 5min, rotating speed 8-10rpm, control liquid;
(11) antistatic treatment: liquor ratio 1.5, temperature 32 DEG C, static inhibitor 6.0%, 30min, stops drum and spends the night;
(12) next day, go out rouse → to take horse hold over night → water squeezing stretching, extension → vacuum-drying (temperature: 65 DEG C, pressure: 0.99Mpa, time 2min) → extension dry dry → pluck Pi Huixing → vibration to draw soft → toggling → deburring → work in-process;
(13) back cover agent is sprayed: urethane resin 120, water 100, ethyl glycol 80; Right-angled intersection sprays one time;
(14) primary coat: bottom spraying agent is made up of the raw material of following weight part: pigment paste 100, from plate wax 30, acrylic resin 200, middle flexible polyurethane 100, leather linking agent 10, water 200, static inhibitor consumption is coating and decorating material gross weight × 2.5%; Right-angled intersection sprays one time;
(14) press: temperature 100 DEG C, pressure 80Kg/cm
2;
(15) be coated with in: middle level spraying agent is made up of the raw material of following weight part: pigment paste 80, from plate wax 20, acrylic resin 200, middle flexible polyurethane 140, leather linking agent 5, water 300, static inhibitor consumption is coating and decorating material gross weight × 2.5%; Right-angled intersection sprays one time;
(16) press: temperature 100 DEG C, pressure 50Kg/cm
2;
(17) top is coated with: top layer spraying agent is made up of the raw material of following weight part: nitro-cotton brightening agent 100, water 100; Right-angled intersection sprays one time;
(18) press: temperature 100 DEG C, pressure 40Kg/cm
2;
(19) finished product.
Another technical scheme of the present invention is that one obtains antistatic cattle hide upper leather by aforesaid method, it is characterized in that index that it meets is as follows:
1. shrinkage temperature >=95 DEG C, not tempering stored for a long time;
2. volume specific resistance is 10
3Ω m, flesh noodles absorption scraps of paper number is 4, antistatic grade is 4 grades;
3. specific conductivity: 10
-6s/cm;
4. elongation at break >=70%;
5. stretched rate≤35%;
6. tear strength>=40N/mm
2;
7. burst apart height >=9mm;
8. tensile strength >=15Mpa;
9. 20000 times, folding fastness front flawless is covered with paint, lacquer, colour wash, etc.;
⑩pH4.0-6.0。
Embodiment
Below by enforcement, the present invention is specifically described; what be necessary to herein means out is that the present embodiment is only used to further illustrate the present invention; and limiting the scope of the invention can not be interpreted as, the person skilled in the art in this field can make some nonessential improvement and adjustment according to the content of foregoing invention.
Embodiment 1
With common process gained wet blue leather for raw material;
(1) sampling is weighed, heavy according to 120% of wet blue leather;
(2) wash: liquor ratio 3.0, temperature normal temperature, vexed washing 2 times, each 5min, rotating speed 8-10rpm, control liquid;
(3) ease back: liquor ratio 2.0, Nei Wen establishes 32 DEG C, rotating speed 8-10rpm, adds formic acid, turns 40min, then surveys pH, then controls liquid;
(4) wash: liquor ratio 3.0, temperature normal temperature, vexed washing 2 times, each 5min, rotating speed 8-10rpm, control liquid;
(5) retanning: liquor ratio 1.5, interior temperature 32 DEG C, add NL20 (Sichuan Dowell Technology Co., Ltd., neutralizing retanning agent), turn 30min, require pH>4.6, add A18 (Sichuan Dowell Technology Co., Ltd., small molecules vinylformic acid) and A33 (Sichuan Dowell Technology Co., Ltd., macromole vinylformic acid), turn 40min, add DD42 (Sichuan Dowell Technology Co., Ltd., aminoresin) and MM51 (Sichuan Dowell Technology Co., Ltd., decentralized synthetic tanning agent), turn 40min;
(6) wash: liquor ratio 3.0, temperature normal temperature, vexed washing 2 times, each 5min, rotating speed 8-10rpm, control liquid;
(7) fill: liquor ratio 1.5, interior temperature 32 DEG C, adds R7 (bright Sheng, syntannin), OH (bright Sheng, syntannin), turns 30min; Add valonex 5.0%, myrica extract 5.0%, wattle skin 5.0%, turn 60min, add formic acid, turn 30min, then control liquid;
(8) neutralize: liquor ratio 1.5, interior temperature 32 DEG C, adds sodium formiate 0.8%, turns 20min; Add sodium bicarbonate 0.6%, turn 40min, survey pH, require pH=5.2-5.4, in and full impregnated, then control liquid;
(9) dyeing and fat-liquoring: liquor ratio 1.5, interior temperature 52-55 DEG C, add black dyes 2.5%, JM (Sichuan Dowell Technology Co., Ltd., sulphonated fat-liquoring agent) 2.0%, DF (Sichuan Dowell Technology Co., Ltd., sulphiting neat's foot oil fatting agent) 2.0%, FS-90 (Sichuan Dowell Technology Co., Ltd., Yelkin TTS fatting agent) 1.0% turn of 60min, check staining conditions, thoroughly do not continue to turn 40min; Add JM (Sichuan Dowell Technology Co., Ltd., sulphonated fat-liquoring agent) 2.0%, DF (Sichuan Dowell Technology Co., Ltd., sulphiting neat's foot oil fatting agent) 3.0%, turn 60min; Divide and add formic acid 2 times, often turn 20min, survey pH, terminal pH and require about 4.0, then control liquid;
(10) wash: liquor ratio 3.0, temperature normal temperature, vexed washing 2 times, each 5min, rotating speed 8-10rpm, control liquid;
(11) antistatic treatment: liquor ratio 1.5, temperature 32 DEG C, static inhibitor trimethyl-glycine 6.0%, 30min, stops drum and spends the night;
(12) next day, go out rouse → to take horse hold over night → water squeezing stretching, extension → vacuum-drying (temperature 65 DEG C, pressure 0.99Mpa, time 2min) → extension dry dry → pluck Pi Huixing → vibration to draw soft → toggling → deburring → work in-process;
(13) concrete scheme is covered with paint, lacquer, colour wash, etc. as shown in table 1;
(14) dried sample detects the physicochemical property of finished leather according to standard QB/T1873-2004.According to the antistatic simple detection method that standard GB/T/T12703.2-2009 detection surface density of charge principle is independently set up, the sample after sampling is regulated under the test condition of regulation, then detects.Sample after friction attracts the preset scraps of paper, because of in routine use, flesh side of a belt and other materials or human contact rub more, judgement sample antistatic effect how much is carried out from the flesh noodles absorption scraps of paper, attract the quantity of the scraps of paper to represent antistatic property to measure sample, attracting scraps of paper quantity, fewer to represent antistatic property better.Use the volume resistance Rv of 6487 type volume resistance survey meter measure sample of KEITHLEY company, utilize formula ρ v (Ω m)=Rv × width × thickness/length, the volume specific resistance of calculation sample.Gained antistatic cattle hide upper leather finished leather performance perameter is as shown in table 2.
The antistatic cattle hide upper leather of table 1 covers with paint, lacquer, colour wash, etc. scheme
The performance perameter of table 2 finished leather
Claims (5)
1. antistatic cattle hide upper leather, is characterized in that:
(1) shrinkage temperature >=95 DEG C, not tempering stored for a long time
(2) volume specific resistance is 10
3Ω m, flesh noodles absorption scraps of paper number is 4, antistatic grade is 4 grades;
(3) specific conductivity: 10
-6s/cm;
(4) elongation at break >=70%;
(5) stretched rate≤35%;
(6) tear strength>=40N/mm
2;
(7) burst apart height >=9mm;
(8) tensile strength >=15Mpa;
(9) 20000 times, folding fastness front flawless is covered with paint, lacquer, colour wash, etc.;
（10）pH4.0-6.0。
2. the preparation method of antistatic cattle hide upper leather described in claim 1, it is characterized in that it is take wet blue leather as raw material, and its method comprises the steps:
1. hygrometric state dyeing and finishing antistatic treatment:
By wet blue water squeezing, shaving, wash, ease back, retanning, washing, filling, washing, neutralization, dyeing and fat-liquoring, washing, antistatic treatment, then stop that drum spends the night, goes out drum, water squeezing stretching, extension, vacuum-drying, moisture regain are shaken soft;
Wherein antistatic treatment is operating as: liquor ratio 1.5, temperature 32 DEG C, and static inhibitor 6.0%, turns 30min; The same common process of other technique;
2. dry state dyeing and finishing antistatic treatment: covering with paint adopts conductive filler material to be doped in coated material and processes coating, and concrete operations are: through the crust leather-spray back cover agent-sprayed layer undercoat antistatic slurry-ironing-spraying middle level antistatic slurry-top layer spraying-ironing-finished product of hygrometric state dyeing and finishing antistatic treatment.
3. the preparation method of antistatic cattle hide upper leather described in claim 2, is characterized in that:
Described step 1. in antistatic treatment agent be: trimethyl-glycine, ethoxylated fat race alkylamine, any one in the derivative of cationic quaternary ammonium salt, sulfuric ester, phosphoric acid ester, polyoxyethylene glycol or amido Soxylat A 25-7.
4. the preparation method of a kind of environmental protection type antistatic cattle hide upper leather described in claim 2, is characterized in that:
Described step 2. in:
Back cover agent is made up of the raw material of following weight part: urethane resin 120, water 100, ethyl glycol 80;
Bottom spraying agent is made up of the raw material of following weight part: pigment paste 100, from plate wax 30, and synthesis resin 50, soft propene acid resin 60, middle soft propene acid resin 130, middle flexible polyurethane 100, leather linking agent 5, water 200, static inhibitor 120;
Middle level spraying agent is made up of the raw material of following weight part: pigment paste 100, from plate wax 30, in hard acrylic resin 70, soft propene acid resin 50, middle soft propene acid resin 80, middle flexible polyurethane 140, leather linking agent 5, water 300, static inhibitor 120;
Top layer spraying agent is made up of the raw material of following weight part: nitro-cotton brightening agent 100, water 100;
Added by covering with paint, lacquer, colour wash, etc. in formula, static inhibitor is at least one in polyaniline (PAN), graphitized carbon black and nanometer silver.
5. the preparation method of antistatic cattle hide upper leather described in claim 1-4, is characterized in that:
(1) sampling is weighed, heavy according to 120% of wet blue leather;
(2) wash: liquor ratio 3.0, temperature normal temperature, vexed washing 2 times, each 5min, rotating speed 8-10rpm, control liquid;
(3) ease back: liquor ratio 2.0, Nei Wen establishes 32 DEG C, rotating speed 8-10rpm, adds formic acid, turns 40min, then surveys pH, then controls liquid;
(4) wash: liquor ratio 3.0, temperature normal temperature, vexed washing 2 times, each 5min, rotating speed 8-10rpm, control liquid;
(5) retanning: liquor ratio 1.5, interior temperature 32 DEG C, adds neutralizing retanning agent 3.0%, turns 30min, require pH>4.6, and anionic acrylic resin 6.0%, turns 40min, and aminoresin 6.0%, turns 40min;
(6) wash: liquor ratio 3.0, temperature normal temperature, vexed washing 2 times, each 5min, rotating speed 8-10rpm, control liquid;
(7) fill: liquor ratio 1.5, interior temperature 32 DEG C, adds synthetic compound tanning agent 10%, turns 30min; Add tannin extract 15% turn of 60min, add formic acid, turn 30min, then control liquid;
(8) neutralize: liquor ratio 1.5, interior temperature 32 DEG C, adds sodium formiate 0.8%, turns 20min; Add sodium bicarbonate 0.6%, turn 40min, survey pH, require pH=5.2-5.4, in and full impregnated, then control liquid;
(9) dyeing and fat-liquoring: liquor ratio 1.5, interior temperature 52-55 DEG C, adds black dyes 2.5%, osmosis type grease 5.0%, turns 60min, checks staining conditions, does not thoroughly continue to turn 40min; Add synthesis quasi-grease 4.0%, turn 60min; Divide and add formic acid 2 times, often turn 20min, survey pH, terminal pH and require about 4.0, then control liquid;
(10) wash: liquor ratio 3.0, temperature normal temperature, vexed washing 2 times, each 5min, rotating speed 8-10r/min, control liquid;
(11) antistatic treatment: liquor ratio 1.5, temperature 32 DEG C, static inhibitor 6.0%, 30min, stops drum and spends the night;
(12) next day, go out rouse → to take horse hold over night → water squeezing stretching, extension → vacuum-drying (temperature: 65 DEG C, 0.99Mpa, time 2min) → extension dry dry → pluck Pi Huixing → vibration to draw soft → toggling → deburring → work in-process;
(13) back cover agent is sprayed: urethane resin 120, water 100, ethyl glycol 80; Right-angled intersection sprays one time;
(14) primary coat: bottom spraying agent is made up of the raw material of following weight part: pigment paste 100, from plate wax 30, acrylic resin 200, middle flexible polyurethane 100, leather linking agent 10, water 200, static inhibitor consumption is coating and decorating material gross weight × 2.5%; Right-angled intersection sprays one time;
(14) press: temperature 100 DEG C, pressure 80Kg/cm
2;
(15) be coated with in: middle level spraying agent is made up of the raw material of following weight part: pigment paste 80, from plate wax 20, acrylic resin 200, middle flexible polyurethane 140, leather linking agent 5, water 300, static inhibitor consumption is coating and decorating material gross weight × 2.5%; Right-angled intersection sprays one time;
(16) press: temperature 100 DEG C, pressure 50Kg/cm
2;
(17) top is coated with: top layer spraying agent is made up of the raw material of following weight part: nitro-cotton brightening agent 100, water 100;
Right-angled intersection sprays one time;
(18) press: temperature 100 DEG C, pressure 40Kg/cm
2;
(19) finished product.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105867073A (en) * | 2016-06-04 | 2016-08-17 | 深圳市柯士达光电有限公司 | Anti-static exposure machine system and manufacturing method thereof |
| CN108559807A (en) * | 2018-04-04 | 2018-09-21 | 徐雄剑 | A kind of leather care products and preparation method thereof |
| CN109593452A (en) * | 2018-11-22 | 2019-04-09 | 温州东泰树脂有限责任公司 | Aqueous matte surface finishing agent and preparation method thereof |
| CN111286219A (en) * | 2020-03-19 | 2020-06-16 | 福建华峰运动用品科技有限公司 | Method for recovering carbon black from shoe material and application |
| CN114561498A (en) * | 2022-02-24 | 2022-05-31 | 上海金狮化工有限公司 | Antistatic fatting agent, preparation method and production method of antistatic leather |
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| CN1978670A (en) * | 2006-11-24 | 2007-06-13 | 陕西科技大学 | Antistatic leather and its preparing method |
| CN101993962A (en) * | 2009-08-27 | 2011-03-30 | 际华三五一五皮革皮鞋有限公司 | Method for manufacturing waterproof soft-surface leather |
| CN102586508A (en) * | 2011-12-26 | 2012-07-18 | 河北东明牛皮制革有限公司 | Production method of leather for cow leather clothes |
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| CN1978670A (en) * | 2006-11-24 | 2007-06-13 | 陕西科技大学 | Antistatic leather and its preparing method |
| CN101993962A (en) * | 2009-08-27 | 2011-03-30 | 际华三五一五皮革皮鞋有限公司 | Method for manufacturing waterproof soft-surface leather |
| CN102586508A (en) * | 2011-12-26 | 2012-07-18 | 河北东明牛皮制革有限公司 | Production method of leather for cow leather clothes |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105867073A (en) * | 2016-06-04 | 2016-08-17 | 深圳市柯士达光电有限公司 | Anti-static exposure machine system and manufacturing method thereof |
| CN108559807A (en) * | 2018-04-04 | 2018-09-21 | 徐雄剑 | A kind of leather care products and preparation method thereof |
| CN109593452A (en) * | 2018-11-22 | 2019-04-09 | 温州东泰树脂有限责任公司 | Aqueous matte surface finishing agent and preparation method thereof |
| CN109593452B (en) * | 2018-11-22 | 2021-01-29 | 温州东泰树脂有限责任公司 | Water-based matte finishing agent and preparation method thereof |
| CN111286219A (en) * | 2020-03-19 | 2020-06-16 | 福建华峰运动用品科技有限公司 | Method for recovering carbon black from shoe material and application |
| CN114561498A (en) * | 2022-02-24 | 2022-05-31 | 上海金狮化工有限公司 | Antistatic fatting agent, preparation method and production method of antistatic leather |
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| CN105039611B (en) | 2020-08-18 |
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