CN105671220B - One kind is without the anti-suede garment leather preparation technology of chrome tanning pigskin head layer - Google Patents
One kind is without the anti-suede garment leather preparation technology of chrome tanning pigskin head layer Download PDFInfo
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- CN105671220B CN105671220B CN201610050182.2A CN201610050182A CN105671220B CN 105671220 B CN105671220 B CN 105671220B CN 201610050182 A CN201610050182 A CN 201610050182A CN 105671220 B CN105671220 B CN 105671220B
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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
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
- C14B1/00—Manufacture of leather; Machines or devices therefor
- C14B1/02—Fleshing, unhairing, samming, stretching-out, setting-out, shaving, splitting, or skiving skins, hides, or leather
-
- 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
- C14C3/16—Chemical tanning by organic agents using aliphatic aldehydes
-
- 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
- C14C5/00—Degreasing leather
-
- 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
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
- D06P3/02—Material containing basic nitrogen
- D06P3/04—Material containing basic nitrogen containing amide groups
- D06P3/32—Material containing basic nitrogen containing amide groups leather skins
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
- C14B2700/00—Mechanical treatment or processing of skins, hides or leather in general; Pelt-shearing machines; Making driving belts; Machines for splitting intestines
- C14B2700/14—Processes or apparatus for setting-out, smoothing, ironing or polishing leather or hides
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention belongs to anti-suede garment leather preparation technology field, more particularly to one kind to comprise the following steps without the anti-suede garment leather preparation technology of chrome tanning pigskin head layer（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, main tanning, main degreasing, water squeezing retanning, water squeezing stuffing and dyeing and fat-liquoring.The present invention provides one kind without the anti-suede garment leather preparation technology of chrome tanning pigskin head layer, 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 anti-suede garment leather of gained is wear-resisting, and high temperature resistant is plentiful, soft.
Description
Technical field
The invention belongs to anti-suede garment leather preparation technology field, more particularly to one kind is without the anti-matte clothes of chrome tanning pigskin head layer
Dress leather preparation technology.
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 the anti-suede garment leather preparation technology of chrome tanning pigskin head layer, it has step simple
Single, preparation efficiency is high, prepares the advantages of anti-suede garment 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 to be prepared without the anti-suede garment leather of chrome tanning pigskin head layer
Technique, 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
Ease back, pickling eases back, main tanning, main degreasing, water squeezing retanning, water squeezing stuffing and dyeing and fat-liquoring, the degreasing ease back in step
Liquor ratio is 100%, adds 1.0-2.0% degreasing agent and 10-12% Nacl, pH 6.0-6.2, and temperature is 25-28 DEG C,
Degreasing time that eases back is 60-90min, and the pickling liquor ratio in step that eases back is 100-200%, add 1.0-1.5% sulfuric acid with
And 10-12% Nacl, pH 1.8-2.0, temperature are 25-26 DEG C, pickling time that eases back is 120-150min, the main tan
The tanning agent used in step processed is aluminium tanningagent and aldehyde tanning agent, and pH scopes divide three phases, and early stage, 3.0-3.2, passed through for the first time
Sodium formate and sodium bicarbonate regulation are added, mid-term 3.5-3.6, is adjusted by second of addition sodium formate, later stage 4.0-5.0,
Adjusted by second of addition sodium bicarbonate, temperature is 35-36 DEG C, and liquor ratio is 100% in the main defatting step, adds 1.0-
1.5% oxalic acid and 1.0-1.2% degreasing agent, pH 3.0-3.4, temperature are 32-36 DEG C, and main degreasing time is 60-
80min, for the tanning agent used in the water squeezing retanning step for aluminium tanningagent, liquor ratio 150-180%, pH scope are in two stages, preceding
Phase is 4.2-4.5, is adjusted by first time addition sodium bicarbonate, later stage 6.5-6.6, is adjusted by second of addition sodium bicarbonate,
Water squeezing retanning temperature is 32-35 DEG C, in the water squeezing fatliquoring steps liquor ratio be 100% fatting agent used for fat liquoring complex agent, pH
For 3.8-4.0, temperature is 50-52 DEG C, and the water squeezing stuffing time is 150-160min, and liquor ratio is in the dyeing and fat-liquoring step
500%, pH 4.0-4.2, temperature are 45-50 DEG C.The preparation technology of the anti-suede garment leather of pigskin head layer described in the setting has
Step is simple, and preparation efficiency is high, and requirement of the preparation process to equipment be low and the advantages of energy-conserving and environment-protective.
Further preferred technical scheme is：In the main tanning step formic acid is first added before the tanning agent is added
Sodium, sodium bicarbonate and the ester of phosphoglycerol three, 60-70min is stirred, the amount for sequentially adding the aluminium tanningagent is 2.0-2.2%, described
Aldehyde tanning agent is 6.0-6.5%, and the amount of the aldehyde tanning agent uniformly divides three parts, is successively separately added into three times, and be stirred continuously, Zhi Houzai
The other compositions added in main tanning, sequentially add sodium formate, antioxidant, tannin, iron powder, mould inhibitor and sodium bicarbonate, institute
The scope for stating the amount of main tanning other compositions is 8.0-12.0%, finally stirs 300-500min.
Further preferred technical scheme is：The tannin is vegetable tannins essence, and the amount of addition is 6.0-6.2%, divides three
It is secondary to be uniformly added into, per minor tick 30-35min, during which it is stirred continuously.
Further preferred technical scheme is：The amount that second of the sodium bicarbonate adds is 1.5-2.0%, is divided into five
Secondary addition, per minor tick 30-35min, during which it is stirred continuously.
Further preferred technical scheme is：Carry out out successively after the main tanning step drum take horse stand, pressure water,
Get rid of soft and shaving deburring step.
Further preferred technical scheme is：Glutaraldehyde tanning agent and aluminium tanningagent conduct are used in the water squeezing retanning step
Tanning agent, the amount of the glutaraldehyde tanning agent is 2.0-2.5%, and the amount of the aluminium tanningagent is 2.0-2.2%, stirs 30-35min afterwards,
The sodium bicarbonate that 3.0-3.5% tannin, 2.0-2.2% protein filling and 1.0-1.5% are added after the tanning agent is added is adjusted
Section pH is 4.2-4.5, completes process early stage of the water squeezing retanning step, carries out the later stage work of the water squeezing retanning step afterwards
Sequence simultaneously improves pH to 6.5-6.6.The retanning sets the richness for improving obtained anti-suede garment leather, after being advantageous to leather
Continuous dyeing is more uniform..
Further preferred technical scheme is：Later stage process in the water squeezing retanning step, including add 2.0-
It is 6.5-6.6 that the sodium bicarbonate of 3.0% leather gloss oil and the sodium formate and 1.5-2.0% that add 1.0-1.2%, which adjusts pH, stirs 90-
120min。
Further preferred technical scheme is：Fat liquoring complex agent is sequentially added in the water squeezing fatliquoring steps, for the first time
The dyestuff and adjuvant of dyeing, the fat liquoring complex agent include 2.0-2.5% linoleic acid fish oil and 4.0-1.5% sulphur
Be combined to oil, the adjuvant include 1.0-1.4% dispersant, 4.0-4.6% migration inhibitor and 3.0-3.8% softening
Agent and the compound of emulsifying agent, 90-100min is stirred after the completion of addition, is eventually adding 1.0-1.2% first acid for adjusting pH to 3.8-
4.0, the formic acid is uniformly added at twice, is spaced 30-35min.
Further preferred technical scheme is：Cooling water outlet is carried out successively after the water squeezing fatliquoring steps, gets rid of soft toggling
And first time deburring.
Further preferred technical scheme is：It is divided into second of dyeing process and stuffing work in the dyeing and fat-liquoring step
Sequence, dyestuff and surface active agent are added in the dyeing process, the total amount that surface active agent adds be 1.5-2.0%, described to add
The amount of the fatting agent added in fat process is 6.0-8.0%, is finally stirred and adjusts pH, mixing time 100-120min.
The present invention provides one kind without the anti-suede garment leather preparation technology of chrome tanning pigskin head layer, and it has, and step is simple, prepares
Efficiency high, preparation process is low for equipment requirements, energy-conserving and environment-protective, prepare gained anti-suede garment leather it is wear-resisting, high temperature resistant is plentiful,
The advantages of 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 the anti-suede garment leather preparation technology of chrome tanning pigskin head layer（From sour skin scytoblastema
Start, the addition of each operation additive is on the basis of the quality of sour skin）：Degreasing eases back, pickling eases back, main tanning, main degreasing,
Water squeezing retanning, water squeezing stuffing and dyeing and fat-liquoring, the following detailed description of the embodiment of the present invention：
Process dosage materials temperature-time remarks
Degreasing eases back 10% Nacl, 25 DEG C of liquor ratios 100%
1.0% degreasing agent 60min pH6.0
25 DEG C of washing 20min
Pickling eases back 10% Nacl, 25 DEG C of liquor ratios 100%
1.0% sulfuric acid 120min pH1.8
The main sodium formate of tanning 1.0%
0.5% sodium bicarbonate 30min pH3.0
The ester 30min of 0.5% phosphoglycerol three
2.0% aluminium tanningagent 60min
2.0% glutaraldehyde tanning agent 60min
2.0% glutaraldehyde tanning agent 60min
2.0% glutaraldehyde tanning agent 90min
1.0% sodium formate 30min pH3.5
1.0% antioxidant 10min
2.0% tannin 30min
2.0% tannin 30min
2.0% tannin 90min
0.2% iron powder
0.1% mould inhibitor 30min
1.5% 30 × 5min of sodium bicarbonate pH4.0
（35 DEG C are warming up to, stirs 300min, then stops drum overnight）
Go out drum to take horse standing, press water to get rid of soft, shaving deburring
32 DEG C of liquor ratios 100% of main 1.0% oxalic acid of degreasing
1.0% degreasing agent 60min pH3.2
Water squeezing retanning 2.0% glutaraldehyde tanning agent, 32 DEG C of 30min liquor ratios 150%
2.0% aluminium tanningagent 60min
3.0% tannin 60min
2.0% Techniques of Protein Filling Agents 60min
1.0% 30 × 4min of sodium bicarbonate pH4.2
2.0% leather gloss oil
1.0% sodium formate
1.5% sodium bicarbonate 90min pH6.5
50 DEG C of 2.0% linoleic acid fish oil of water squeezing stuffing
4.0% sulfonation artificial oil
Dyestuff
1.0% dispersant
4.0% migration inhibitor
3.0% softening agent, emulsifier complex 90min
1.0% 30 × 2min of formic acid pH3.8
Cool water outlet, and extension, which dries in the air, gets rid of soft, toggling deburring
45 DEG C of dyeing and fat-liquoring dyestuff
1.5% surface active agent
6.0% fatting agent 100min
1.5% 30 × 2min of formic acid pH4.0
Cooling is taken out, and extension, which dries in the air, gets rid of soft, toggling deburring, 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 (9)
1. it is a kind of without the anti-suede garment leather preparation technology of chrome tanning pigskin head layer, comprise the following steps, since sour skin scytoblastema, each work
The addition of sequence additive is on the basis of the quality of sour skin：Degreasing eases back, pickling eases back, main tanning, main degreasing, water squeezing retanning,
Water squeezing stuffing and dyeing and fat-liquoring, it is characterised in that：The degreasing liquor ratio in step that eases back is 100%, adds the de- of 1.0-2.0%
Fat 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, described
The pickling liquor ratio in step that eases back is 100-200%, adds 1.0-1.5% sulfuric acid and 10-12% Nacl, pH 1.8-
2.0, temperature is 25-26 DEG C, and pickling time that eases back is 120-150min, and the tanning agent used in the main tanning step is aluminium tanningagent
And aldehyde tanning agent, pH scopes divide three phases, early stage, 3.0-3.2, was adjusted, mid-term by first time addition sodium formate and sodium bicarbonate
For 3.5-3.6, adjusted, later stage 4.0-5.0, adjusted by second of addition sodium bicarbonate, temperature by second of addition sodium formate
Spend for 35-36 DEG C, liquor ratio is 100% in the main defatting step, adds the degreasing of 1.0-1.5% oxalic acid and 1.0-1.2%
Agent, pH 3.0-3.4, temperature are 32-36 DEG C, and main degreasing time is 60-80min, the tan used in the water squeezing retanning step
Agent is aluminium tanningagent, and in two stages, early stage, 4.2-4.5, sodium bicarbonate was added by first time to liquor ratio 150-180%, pH scope
Regulation, later stage 6.5-6.6, adjusted by second of addition sodium bicarbonate, water squeezing retanning temperature is 32-35 DEG C, and the water squeezing adds
In fat step liquor ratio be 100% fatting agent used for fat liquoring complex agent, pH 3.8-4.0, temperature be 50-52 DEG C, water squeezing stuffing
Time is 150-160min, and liquor ratio is 500%, pH 4.0-4.2 in the dyeing and fat-liquoring step, and temperature is 45-50 DEG C；It is described
Sodium formate, sodium bicarbonate and the ester of phosphoglycerol three are first added in main tanning step before the tanning agent is added, stirs 60-
70min, the amount for sequentially adding the aluminium tanningagent are 2.0-2.2%, and the aldehyde tanning agent is 6.0-6.5%, and the amount of the aldehyde tanning agent is equal
Even point three parts, successively it is separately added into, and is stirred continuously three times, the other compositions added afterwards in main tanning, sequentially adds first
Sour sodium, antioxidant, tannin, iron powder, mould inhibitor and sodium bicarbonate, the scope of the amount of the main tanning other compositions is 8.0-
12.0%, finally stir 300-500min.
2. one kind according to claim 1 is without the anti-suede garment leather preparation technology of chrome tanning pigskin head layer, it is characterised in that：Institute
Tannin is stated as vegetable tannins essence, the amount of addition is 6.0-6.2%, is uniformly added into three times, per minor tick 30-35min, during which not
Disconnected stirring.
3. one kind according to claim 1 is without the anti-suede garment leather preparation technology of chrome tanning pigskin head layer, it is characterised in that：Institute
It is 1.5-2.0% to state the amount that second of sodium bicarbonate adds, and is divided into five additions, per minor tick 30-35min, during which constantly stirs
Mix.
4. one kind according to claim 1 is without the anti-suede garment leather preparation technology of chrome tanning pigskin head layer, it is characterised in that：Institute
State and carry out out drum after main tanning step successively and take horse standing, press water, get rid of soft and shaving deburring step.
5. one kind according to claim 1 is without the anti-suede garment leather preparation technology of chrome tanning pigskin head layer, it is characterised in that：Institute
To state in water squeezing retanning step using glutaraldehyde tanning agent and aluminium tanningagent as tanning agent, the amount of the glutaraldehyde tanning agent is 2.0-2.5%,
The amount of the aluminium tanningagent is 2.0-2.2%, stirs 30-35min afterwards, and 3.0-3.5% list is added after the tanning agent is added
Rather, 2.0-2.2% protein filling and 1.0-1.5% sodium bicarbonate regulation pH are 4.2-4.5, complete the water squeezing retanning step
Process early stage, carry out the later stage process of the water squeezing retanning step afterwards and improve pH to 6.5-6.6.
6. one kind according to claim 5 is without the anti-suede garment leather preparation technology of chrome tanning pigskin head layer, it is characterised in that：Institute
State the later stage process in water squeezing retanning step, including add 2.0-3.0% leather gloss oil and add 1.0-1.2% sodium formate and
1.5-2.0% sodium bicarbonate regulation pH is 6.5-6.6, stirs 90-120min.
7. one kind according to claim 1 is without the anti-suede garment leather preparation technology of chrome tanning pigskin head layer, it is characterised in that：Institute
State and fat liquoring complex agent is sequentially added in water squeezing fatliquoring steps, for the first time the dyestuff and adjuvant of dyeing, the fat liquoring complex agent
The sulfonation artificial oil of linoleic acid fish oil and 4.0-4.5% including 2.0-2.5%, the adjuvant include 1.0-1.4% point
The compound of powder, the softening agent of 4.0-4.6% migration inhibitor and 3.0-3.8% and emulsifying agent, 90- is stirred after the completion of addition
100min, it is eventually adding 1.0-1.2% first acid for adjusting pH to 3.8-4.0, the formic acid and is uniformly added at twice, is spaced 30-
35min。
8. one kind according to claim 7 is without the anti-suede garment leather preparation technology of chrome tanning pigskin head layer, it is characterised in that：Institute
Cooling water outlet is carried out successively after stating water squeezing fatliquoring steps, gets rid of soft toggling and first time deburring.
9. one kind according to claim 1 is without the anti-suede garment leather preparation technology of chrome tanning pigskin head layer, it is characterised in that：Institute
State and be divided into second of dyeing process and stuffing process in dyeing and fat-liquoring step, dyestuff and surface profit are added in the dyeing process
Humectant, the total amount that surface active agent adds is 1.5-2.0%, and the amount of the fatting agent added in the stuffing process is 6.0-8.0%,
Finally it is stirred and adjusts pH, mixing time 100-120min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610050182.2A CN105671220B (en) | 2016-01-26 | 2016-01-26 | One kind is without the anti-suede garment leather preparation technology of chrome tanning pigskin head layer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610050182.2A CN105671220B (en) | 2016-01-26 | 2016-01-26 | One kind is without the anti-suede garment leather preparation technology of chrome tanning pigskin head layer |
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| CN105671220A CN105671220A (en) | 2016-06-15 |
| CN105671220B true CN105671220B (en) | 2018-03-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| IT201600078139A1 (en) * | 2016-07-26 | 2018-01-26 | Glycolor S R L | USE OF TRIETHYL CITRATE AND / OR 6'-DEOSSI-6'-PIPERAZINYL-2.3: 5.6: 3 ', 4'-TRI-O- (ISOPROPYLIDEN) LACTOSE DIMETHYL ACETAL AND THEIR COMPOSITIONS IN ANIMAL SKIN PROCESSING AND IN THE DYEING OF WOOD. |
| CN111763782B (en) * | 2020-08-11 | 2021-11-26 | 湖南银河制革有限公司 | Preparation process of white super-soft environment-friendly leather |
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| CN101463397B (en) * | 2009-01-14 | 2012-07-11 | 王德振 | Method for manufacturing chromium-free tanning environment protection pigskin shoes |
| 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 |
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