CN105567885B - One kind is without two layers of shoe lining leather preparation technology of chrome tanning pigskin - Google Patents
One kind is without two layers of shoe lining leather preparation technology of chrome tanning pigskin Download PDFInfo
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- CN105567885B CN105567885B CN201610050183.7A CN201610050183A CN105567885B CN 105567885 B CN105567885 B CN 105567885B CN 201610050183 A CN201610050183 A CN 201610050183A CN 105567885 B CN105567885 B CN 105567885B
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- 239000010985 leather Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 238000005516 engineering process Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000005238 degreasing Methods 0.000 claims abstract description 15
- 238000004043 dyeing Methods 0.000 claims abstract description 14
- 238000005554 pickling Methods 0.000 claims abstract description 8
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 17
- 239000010410 layer Substances 0.000 claims description 15
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical compound [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 claims description 9
- 235000019254 sodium formate Nutrition 0.000 claims description 9
- 239000004280 Sodium formate Substances 0.000 claims description 8
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 6
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 6
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000003963 antioxidant agent Substances 0.000 claims description 4
- 230000003078 antioxidant effect Effects 0.000 claims description 4
- 238000005237 degreasing agent Methods 0.000 claims description 4
- 239000013527 degreasing agent Substances 0.000 claims description 4
- 239000000975 dye Substances 0.000 claims description 4
- 239000003112 inhibitor Substances 0.000 claims description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 4
- 239000001648 tannin Substances 0.000 claims description 4
- 235000018553 tannin Nutrition 0.000 claims description 4
- 229920001864 tannin Polymers 0.000 claims description 4
- 238000010792 warming Methods 0.000 claims description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 3
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 2
- 230000032683 aging Effects 0.000 claims description 2
- 239000000498 cooling water Substances 0.000 claims description 2
- 238000007865 diluting Methods 0.000 claims description 2
- 239000002355 dual-layer Substances 0.000 claims description 2
- 235000019253 formic acid Nutrition 0.000 claims description 2
- 239000004519 grease Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 235000006408 oxalic acid Nutrition 0.000 claims description 2
- 238000004073 vulcanization Methods 0.000 claims description 2
- 235000006708 antioxidants Nutrition 0.000 claims 2
- 150000001299 aldehydes Chemical class 0.000 claims 1
- 238000002386 leaching Methods 0.000 claims 1
- 230000007935 neutral effect Effects 0.000 claims 1
- 150000003839 salts Chemical class 0.000 claims 1
- 239000000654 additive Substances 0.000 abstract description 3
- 230000000996 additive effect Effects 0.000 abstract description 3
- 238000005406 washing Methods 0.000 description 3
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241000283707 Capra Species 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- QJMZDEIXTILSMJ-UHFFFAOYSA-L disodium hydrogen carbonate formate Chemical compound [Na+].[Na+].[O-]C=O.OC([O-])=O QJMZDEIXTILSMJ-UHFFFAOYSA-L 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910000073 phosphorus hydride Inorganic materials 0.000 description 1
- UIIMBOGNXHQVGW-UHFFFAOYSA-N sodium;hydron;carbonate Chemical compound [Na+].OC(O)=O UIIMBOGNXHQVGW-UHFFFAOYSA-N 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
- C14C3/30—Chemical tanning using physical means combined with chemical means
-
- 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
- C14C5/00—Degreasing leather
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention belongs to shoe lining leather preparation technology field, more particularly to one kind to comprise the following steps without two layers of shoe lining leather preparation technology of chrome tanning pigskin（Since sour skin scytoblastema, the addition of each operation additive is on the basis of the quality of sour skin）：Degreasing eases back, pickling eases back, tanning, degreasing, water squeezing neutralization and dyeing and fat-liquoring.The present invention provides one kind without two layers of shoe lining leather preparation technology of chrome tanning pigskin, and it has, and step is simple, and preparation efficiency is high, and preparation process is low for equipment requirements, energy-conserving and environment-protective, prepares the advantages of shoe lining leather of gained is wear-resisting, and high temperature resistant is plentiful, soft.
Description
Technical field
The invention belongs to shoe lining leather preparation technology field, more particularly to one kind to prepare works without two layers of shoe lining leather of chrome tanning pigskin
Skill.
Background technology
Curriery is the important traditional light industry in China, and one of more serious industry of blowdown.Traditional leather is more
Tanning agent is made using chromium, chrome leather made from processing has high temperature resistant, and heat endurance is good, leather body it is plentiful, it is soft the advantages of, but because
For chromium ore resource is limited and chrome tanning caused by heavy metal pollution, in people's pay attention to day by day living environment, concern uses environmentally friendly skin
Today of leather, develop no chromed tanned leather leather turns into inexorable trend.
The Chinese invention patent that patent publication No. is the A of CN 101225450, publication date is 2008.07.23 discloses one kind
The chrome-free tanning production technology of goat skin gloves leather, includes following steps, softening → pickling → organic phosphine tanning → oxidation
→ horse standing → water squeezing stretching, extension → shaving → washing → degreasing, rinsing → washing → brother chemicals → washing are taken, then routinely
Chrome tanning subsequent technique carry out.
But the production technology of the invention has tanning step complexity, efficiency is low, and the glove leather of tanning is of poor quality, not rich enough
Completely, the problem of not soft enough.
The content of the invention
It is an object of the invention to provide one kind without two layers of shoe lining leather preparation technology of chrome tanning pigskin, it has, and step is simple, system
Standby efficiency high, prepares the advantages of shoe lining leather of gained is wear-resisting, and high temperature resistant is plentiful, soft.
The present invention solves the technical scheme that problem above uses：It is a kind of without two layers of shoe lining leather preparation technology of chrome tanning pigskin,
Comprise the following steps（Since sour skin scytoblastema, the addition of each operation additive is on the basis of the quality of sour skin）：Degreasing eases back,
Pickling eases back, tanning, degreasing, water squeezing neutralization and dyeing and fat-liquoring, the degreasing liquor ratio in step that eases back is 100%, adds 2.0-
3.0% degreasing agent and 10-12% Nacl, pH 6.0-6.2, temperature are 25-28 DEG C, and degreasing time that eases back is 60-
90min, the pickling liquor ratio in step that eases back is 100-200%, adds 1.0-1.2% sulfuric acid and 10-15% Nacl,
PH is 2.5-2.8, and temperature is 25-26 DEG C, and pickling time that eases back is 120-130min, the tanning agent bag used in the tanning step
Include aluminium tanningagent and glutaraldehyde tanning agent, pH scopes divide three phases, early stage 3.0-3.2, by first time addition sodium formate and small
Soda is adjusted, mid-term 3.5-3.6, is adjusted, later stage 4.0-4.5, is added by second by second of addition sodium formate
Sodium bicarbonate is adjusted, and temperature is 35-38 DEG C, and liquor ratio is 100% in the defatting step, adds 0.5-0.8% oxalic acid and 1.0-
1.5% degreasing agent, pH 3.0-3.3, temperature are 32-35 DEG C, degreasing time 60-62min, in the water squeezing neutralization procedure
Liquor ratio is 100%, and the sodium bicarbonate by adding 1.0-1.5% sodium formates and 2.0-3.0% adjusts pH to 6.0-6.5, and water squeezing neutralizes
Temperature is 32-36 DEG C, time 90-120min, and liquor ratio is 200%, pH 3.8-4.0 in the dyeing and fat-liquoring step, described
The temperature of dyeing and fat-liquoring is 50-52 DEG C.The preparation technology of two layers of shoe lining leather of pigskin described in the setting has that step is simple, prepares
Efficiency high, requirement of the preparation process to equipment be low and the advantages of energy-conserving and environment-protective.
Further preferred technical scheme is：1.0-1.2% sodium formate and 0.5- is first added in the tanning step
1.0% sodium bicarbonate regulation pH is 3.0-3.2, stirs 90-100min, adds 2.0-2.2% aluminium tanningagent and 5.0-6.0%
Glutaraldehyde tanning agent, it be 3.5-3.8 to adjust pH by second sodium formate for adding 1.0-1.2%, stirring 200-250min, so
The auxiliary element of tanning is added afterwards, sequentially adds antioxidant, tannin, iron powder and mould inhibitor, the tanning auxiliary element
Total amount is 7.5-8.0%, stirs 180-200min, and it is 4.0-4.5 to adjust pH finally by sodium bicarbonate, is warming up to 35-36 DEG C, stirs
Mix 300-350min.
Further preferred technical scheme is：The glutaraldehyde tanning agent adds at twice, is every time 2.5-3.0%, interval
60-80min。
Further preferred technical scheme is：Antioxidant is 1.0-1.2% in the tanning auxiliary element, after addition
10-15min is stirred, 6.0-6.5% tannin is added, adds in three times, stir 30-35min every time, be eventually adding 0.2-
0.3% iron powder and 0.1-0.2% mould inhibitor, stir 30-35min.
Further preferred technical scheme is：Drum is carried out out after the tanning step successively to take horse standing, pressure water, get rid of
Soft and shaving deburring step, the bilayer thickness that the shoe lining leather is controlled in the shaving step is 1.0-1.3mm.
Further preferred technical scheme is：Added in the water squeezing neutralization procedure for improving leather Physical Mechanical
Can be with the vulcanization accelerator 2.0-2.5% of ageing-resistant performance.
Further preferred technical scheme is：1.0-1.2% is first added in the dyeing and fat-liquoring step to be used for diluting dyestuff
N-hexane, stir 20min, further according to the grease for needing to add dyestuff and 10-15%, be warming up to 52-55 DEG C, stir 90-
100min, 1.5-1.6% first acid for adjusting pH is eventually adding to 3.8-4.0, finally stirs 60-80min, wherein the formic acid
Amount is uniformly added into three times, per minor tick 15-20min.In the setting, the auxiliary element of the dyeing and fat-liquoring is advantageous to dyeing and added
Fat is more uniform, stable.
Further preferred technical scheme is：Cooling water outlet is carried out after the dyeing and fat-liquoring step, pressure water gets rid of soft.
Further preferred technical scheme is：The pressure water carries out toggling deburring, the toggling work after getting rid of soft step point
Dual-layer heating is carried out in sequence, upper strata heating-up temperature is 40-42 DEG C, and lower floor's heating-up temperature is 45-50 DEG C.
The present invention provides a kind of without two layers of shoe lining leather preparation technology of chrome tanning pigskin, and it has, and step is simple, and preparation efficiency is high,
Preparation process is low for equipment requirements, energy-conserving and environment-protective, prepares the advantages of shoe lining leather of gained is wear-resisting, and high temperature resistant is plentiful, soft.
Embodiment
As described below is only presently preferred embodiments of the present invention, non-that the scope of the present invention is defined.
Embodiment：One kind comprises the following steps without two layers of shoe lining leather preparation technology of chrome tanning pigskin（Since sour skin scytoblastema,
The addition of each operation additive is on the basis of the quality of sour skin）：Degreasing eases back, pickling eases back, tanning, degreasing, water squeezing neutralize
And dyeing and fat-liquoring, the following detailed description of the embodiment of the present invention：
Cooling is taken out, and pressure water gets rid of soft, toggling deburring（Upper strata temperature is 40 DEG C during toggling, and lower floor's temperature is 45 DEG C）, color matching
Deburring, dipping storage
Embodiments of the present invention are explained in detail above, but the invention is not restricted to above-mentioned embodiment, in institute
State in technical field those of ordinary skill's possessed knowledge, can also be made on the premise of present inventive concept is not departed from
Various modifications.These are all without creative modification, as long as all by Patent Law in scope of the presently claimed invention
Protection.
Claims (8)
1. it is a kind of without two layers of shoe lining leather preparation technology of chrome tanning pigskin, comprise the following steps, since sour skin scytoblastema, each operation is added
The addition of thing is on the basis of the quality of sour skin：Degreasing eases back, pickling eases back, tanning, degreasing, water squeezing neutralize and dyeing plus
Fat, it is characterised in that：The degreasing liquor ratio in step that eases back is 100%, adds 2.0-3.0% degreasing agent and 10-12% work
Industry salt, pH 6.0-6.2, temperature are 25-28 DEG C, and degreasing time that eases back is 60-90min, and the pickling eases back liquor ratio in step
For 100-200%, 1.0-1.2% sulfuric acid and 10-15% Nacl, pH 2.5-2.8 are added, temperature is 25-26 DEG C, leaching
Acid time that eases back is 120-130min, and the tanning agent used in the tanning step includes aluminium tanningagent and glutaraldehyde tanning agent, pH scopes
Divide three phases, 3.0-3.2, was adjusted by first time addition sodium formate and sodium bicarbonate, mid-term 3.5-3.6, passed through early stage
Second of addition sodium formate regulation, later stage 4.0-4.5, is adjusted, temperature is 35-38 DEG C, institute by second of addition sodium bicarbonate
It is 100% to state liquor ratio in defatting step, adds 0.5-0.8% oxalic acid and 1.0-1.5% degreasing agent, pH 3.0-3.3, temperature
Spend for 32-35 DEG C, degreasing time 60-62min, liquor ratio is 100% in the water squeezing neutralization procedure, by adding 1.0-1.5%
Sodium formate and 2.0-3.0% sodium bicarbonate adjust pH to 6.0-6.5, and water squeezing neutral temperature is 32-36 DEG C, time 90-
120min, liquor ratio is 200%, pH 3.8-4.0 in the dyeing and fat-liquoring step, and the temperature of the dyeing and fat-liquoring is 50-52 DEG C；
It is 3.0-3.2 that 1.0-1.2% sodium formate and 0.5-1.0% sodium bicarbonate regulation pH are first added in the tanning step, stirring
90-100min, 2.0-2.2% aluminium tanningagent and 5.0-6.0% glutaraldehyde tanning agent are added, 1.0- is added by second
1.2% sodium formate regulation pH is 3.5-3.8, stirs 200-250min, then adds the auxiliary element of tanning, sequentially add anti-
Oxidant, tannin, iron powder and mould inhibitor, the total amount of the tanning auxiliary element is 7.5-8.0%, stirs 180-200min, most
It is 4.0-4.5 to adjust pH by sodium bicarbonate afterwards, is warming up to 35-36 DEG C, stirs 300-350min.
2. one kind according to claim 1 is without two layers of shoe lining leather preparation technology of chrome tanning pigskin, it is characterised in that：Described penta 2
Aldehyde tanning agent adds at twice, is every time 2.5-3.0%, is spaced 60-80min.
3. one kind according to claim 1 is without two layers of shoe lining leather preparation technology of chrome tanning pigskin, it is characterised in that：The tanning
Antioxidant is 1.0-1.2% in auxiliary element, and 10-15min is stirred after addition, adds 6.0-6.5% tannin, is added in three times
Enter, stir 30-35min every time, be eventually adding 0.2-0.3% iron powder and 0.1-0.2% mould inhibitor, stir 30-35min.
4. one kind according to claim 1 is without two layers of shoe lining leather preparation technology of chrome tanning pigskin, it is characterised in that：The tanning
Drum is carried out out after step successively to take horse standing, press water, get rid of soft and shaving deburring step, in the shaving step described in control
The bilayer thickness of shoe lining leather is 1.0-1.3mm.
5. one kind according to claim 1 is without two layers of shoe lining leather preparation technology of chrome tanning pigskin, it is characterised in that：The water squeezing
The vulcanization accelerator 2.0-2.5% for improving leather physical and mechanical properties and ageing-resistant performance is added in neutralization procedure.
6. one kind according to claim 1 is without two layers of shoe lining leather preparation technology of chrome tanning pigskin, it is characterised in that：The dyeing
First add 1.0-1.2% in fatliquoring steps to be used for diluting the n-hexane of dyestuff, stir 20min, further according to need to add dyestuff and
10-15% grease, is warming up to 52-55 DEG C, stirs 90-100min, is eventually adding 1.5-1.6% first acid for adjusting pH to 3.8-
4.0,60-80min is finally stirred, wherein the amount of the formic acid is uniformly added into three times, per minor tick 15-20min.
7. one kind according to claim 1 is without two layers of shoe lining leather preparation technology of chrome tanning pigskin, it is characterised in that：The dyeing
Cooling water outlet is carried out after fatliquoring steps, pressure water gets rid of soft.
8. one kind according to claim 7 is without two layers of shoe lining leather preparation technology of chrome tanning pigskin, it is characterised in that：The pressure water
Toggling deburring is carried out after getting rid of soft step, carries out Dual-layer heating in the toggling process, upper strata heating-up temperature is 40-42
DEG C, lower floor's heating-up temperature is 45-50 DEG C.
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| CN201610050183.7A CN105567885B (en) | 2016-01-26 | 2016-01-26 | One kind is without two layers of shoe lining leather preparation technology of chrome tanning pigskin |
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| CN201610050183.7A CN105567885B (en) | 2016-01-26 | 2016-01-26 | One kind is without two layers of shoe lining leather preparation technology of chrome tanning pigskin |
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| CN105567885B true CN105567885B (en) | 2017-11-21 |
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| CN115261528B (en) * | 2022-05-13 | 2024-03-19 | 河南中牛实业有限公司 | Retanning dyeing method for ecological environment-friendly furniture leather |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE3814220A1 (en) * | 1988-04-27 | 1989-11-09 | Hoechst Ag | METHOD FOR CHROME SAVING |
| CN1020475C (en) * | 1989-01-04 | 1993-05-05 | 袁守熙 | Non-pollution dual tanning technology for glutaric aldehyde pigskin leather |
| CN101463397B (en) * | 2009-01-14 | 2012-07-11 | 王德振 | Method for manufacturing chromium-free tanning environment protection pigskin shoes |
| CN102827965A (en) * | 2012-09-14 | 2012-12-19 | 兴业皮革科技股份有限公司 | Manufacture method of metal-aldehyde-free vegetable tanning oil wax bag leather |
| CN102978299B (en) * | 2012-11-29 | 2014-06-18 | 际华三五一二皮革服装有限公司 | Manufacturing method of light, thin and soft high-strength goat gloving leather |
| CN103589812B (en) * | 2013-11-28 | 2015-07-29 | 兴业皮革科技股份有限公司 | A kind of preparation method of oily wax water dye soft leather |
| CN104762422B (en) * | 2015-03-17 | 2016-10-05 | 峰安皮业股份有限公司 | A kind of manufacture method of vegetable tanning contracting stricture of vagina first layer lether |
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Denomination of invention: A preparation process for chrome free tanned pig leather two-layer shoe lining leather Effective date of registration: 20231227 Granted publication date: 20171121 Pledgee: Bank of Huzhou Co.,Ltd. Pledgor: Haining Home Textile Industrial Base Investment Development Co.,Ltd. Registration number: Y2023980073645 |