CN110004254A - The soft correction processing method of the sturgeon skin of acipenser dabryanus and mandarin sturgeon - Google Patents

The soft correction processing method of the sturgeon skin of acipenser dabryanus and mandarin sturgeon Download PDF

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Publication number
CN110004254A
CN110004254A CN201910325127.3A CN201910325127A CN110004254A CN 110004254 A CN110004254 A CN 110004254A CN 201910325127 A CN201910325127 A CN 201910325127A CN 110004254 A CN110004254 A CN 110004254A
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water
rotary drum
sturgeon
added
sturgeon skin
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CN110004254B (en
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杜浩
危起伟
刘志刚
马岩
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Yangtze River Fisheries Research Institute CAFS
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Yangtze River Fisheries Research Institute CAFS
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    • 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
    • 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
    • C14B1/40—Softening or making skins or leather supple, e.g. by staking, boarding, or crippling machines, by dry mills
    • 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
    • C14B1/44—Mechanical treatment of leather surfaces
    • C14B1/50—Glazing
    • 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
    • C14B1/44—Mechanical treatment of leather surfaces
    • C14B1/54—Ironing
    • 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
    • C14B1/58—Drying
    • 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
    • C14C1/04—Soaking
    • 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
    • C14C15/00—Apparatus for chemical treatment or washing of hides, skins, 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
    • C14C3/06—Mineral tanning using chromium compounds
    • 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
    • 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 & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)
  • Meat, Egg Or Seafood Products (AREA)

Abstract

The invention belongs to leather processing fields, more particularly to the soft correction processing method of the sturgeon skin of acipenser dabryanus and mandarin sturgeon, applicant is dispersed with the natural bone plate of 5 column for sturgeon leather surface, conventional does the problem of soft technique is extremely difficult to the requirement of upper leather, the present invention has focused on solving technical problem in sturgeon upper leather process, the sturgeon upper leather processed is soft, plentiful, tear-resistant, is the quality material for making advanced leather shoes.

Description

The soft correction processing method of the sturgeon skin of acipenser dabryanus and mandarin sturgeon
Technical field
The invention belongs to leather processing fields, and in particular to the soft correction processing side of the sturgeon skin of acipenser dabryanus and mandarin sturgeon Method.
Background technique
Sturgeon leather is the high-end high-quality leather of one kind developed in recent years, can be used for making advanced sturgeon leatherware, such as The sturgeon leather shoes of belt, luggage, leather shoes etc., especially sturgeon leatherwork, decorative pattern is unique, stereo natural, is high-end luxury goods The production of leather shoes provides a kind of completely new material.
Since sturgeon leather surface is dispersed with the natural bone plate of 5 column, the conventional requirement done soft technique and be extremely difficult to upper leather, The present invention has focused on solving technical problem in sturgeon upper leather process, and the sturgeon upper leather processed is soft, plentiful, resistance to Tearing, is the quality material for making advanced leather shoes.
Summary of the invention
The object of the present invention is to provide the soft correction processing methods of the sturgeon skin of acipenser dabryanus and mandarin sturgeon, utilize this The sturgeon soft correction that method processes, it is soft, plentiful, tear-resistant, it is the quality material for making advanced leather shoes.
In order to achieve the above object, the present invention takes following technical measures:
The soft correction processing method of the sturgeon skin of acipenser dabryanus and mandarin sturgeon, includes the following steps:
One, sturgeon skin degreasing tanning
1, rotary drum immersion, pre- degreasing
(1) wet salted hide of material selection acipenser dabryanus or mandarin sturgeon, sufficiently washing sturgeon skin, weigh after washing；
(2) weigh step (1) acquisition sturgeon skin weight 0.51% immersion agent, the fungicide of 1-2%, 1-2%'s Degreasing agent (fraternal chemical industry H900), the water of 200-300%；
(3) it soaks: sturgeon skin and water being put into rotary drum, mix up 20-22 degrees Celsius of temperature value, immersion agent is then added, kills Microbial inoculum, degreasing agent rotate rotary drum, and 2-4 revs/min of rotary drum revolving speed turns to stop within 10-20 minutes 40-50 minutes, feed intake start of calculation certainly certainly Rotary drum terminates as 36-48h, and then flowing water cleans in rotary drum, out drum control water；
2, mechanical degreasing
(1) upward by the sturgeon skin flesh noodles for having soaked water, fin is removed, removes the flesh of fish, fat with wire brush or nylon bruss；
(2) meat and the sturgeon skin warm water of fat will have been gone to clean up, has controlled water.
3, liming degreasing
(1) the sturgeon skin weighing that the mechanical degreasing of step 2 obtains after cleaning；
(2) NaHS particle (the effective content 60- of the 1.0-1.5% of sturgeon skin weight in step 3 (1) is weighed 80%), the lime of 10-15%, the auxiliary liming agent of 0.5-1%, the water of the degreasing agent of 1-2%, 300-400%；
(3) ready sturgeon skin and water are put into rotary drum, sets 20-24 degrees Celsius of temperature, 4-6 revs/min of revolving speed, Degreasing agent is added, NaHS rotates 1h；Auxiliary liming agent, lime are added, turns to stop within 5-15 minutes 40-60 minutes, rotary drum turns Fast 2-3 revs/min, the time to count that feeds intake certainly amounts to 48-60h；
Terminal: sturgeon skin expansion is uniform, strong solution ph > 12 of skin body；
Washing: rotary drum room temperature flowing water washes sturgeon skin；
(4) secondary mechanical fleshing, fat；
4, deliming degreasing
(1) step 3 treated sturgeon skin weighing；
(2) ammonium sulfate of the 1-1.5% of step 4 (1) sturgeon skin weight, the degreasing agent of 1-1.5%, 100-200% are weighed Water, the deliming auxiliary agent of 0.5-1%；
(3) sturgeon skin and water are put into rotary drum, sets 33-36 degrees Celsius of temperature, ammonium sulfate, degreasing agent and deliming is added Auxiliary agent, 2-4 revs/min of rotary drum revolving speed, turns 1-2h,
(4) terminal: phenolphthalein indicator shows notch 1/5--1/6 red heart,
(5) wash: rotary drum warm water sufficiently cleans；
5, soften
(1) the sturgeon skin weighing that step 4 is handled well；
(2) water of the 100-200% of the sturgeon skin weight of step 5 (1), the pancreatin of 0.5-1%, the sulphur of 0.5-1% are weighed Sour ammonium；(3) sturgeon skin and water are put into rotary drum, sets 35-37 degrees Celsius of water temperature, pancreatin and ammonium sulfate, rotary drum revolving speed is added 4-6 revs/min, rotate 1-1h；
(4) terminal: grain is smooth, pure white, and finger pressure has fingerprint, the flexible consolidation of skin body
(5) wash: warm water is sufficiently washed；
6, pickling
(1) the sturgeon skin weighing that step 5 is handled well；
(2) water of the 100-200% of the sturgeon skin weight of step 6 (1) is weighed, the salt of 10-16%, the acetic acid of 1-2%, The concentrated sulfuric acid of 2-2.5%, the nonionic degreasing agent of 1-2%；
(3) sturgeon skin and water are put into rotary drum, set 21-23 degrees Celsius of temperature, salt and nonionic degreasing agent is added, Rotary drum is rotated, 1-2 revs/min, is rotated 25-35 minutes；Acetic acid after dividing the dilution of 2-3 addition equivalent, turns 25-35 every time Minute, turn 4 revs/min；Then the concentrated sulfuric acid after diluting divides 3-5 equivalent to be added, and turns every time 25-45 minutes, and revolving speed 4-6 turns / minute, rotary drum, which is set in, after the completion turns to stop for 5-15 minutes 40-60 minutes, and 2-4 revs/min of revolving speed, to rotary drum since feeding intake Rotation terminates total 24-36h；
(4) terminal: surface is astringent, and skin body is flexible, consolidation, solution ph 2.0-3.0；
(5) degreasing: taking out sturgeon skin under sour skin state, mechanical degreasing is put into former pickling liquid again after sturgeon skin weighing；
7, tanning
(1) modified glutaraldehyde of the 2-4% of the sturgeon skin weight of step 6 is weighed, the aluminium tanningagent of 1-1.5%, 8-10%'s The white tannin extract of Bai Danning, 8-10%, the formic acid of 1-1.5% are received, the sodium bicarbonate of 1.5-2%, the mould inhibitor of 1-1.5%；
(2) it operates
It is carried out in former pickling liquid, sets 22-24 degrees Celsius of temperature, the modified glutaraldehyde after dilution is added rotates 1- 1.5h, 4-6 rev/min；Aluminium tanningagent is added, turns 1-2h, 4-6 revs/min of rotary drum；White tannin is added, white tannin extract turns 4h, 4-6 Rev/min；Stop rousing standing, finishes total 18-32h to standing since feeding intake.
(3) formic acid is added after standing to receive, mould inhibitor turns 1-2h, and 4-6 revs/min；After dividing 5-8 equivalent that dilution is added Sodium bicarbonate, every minor tick 30-50 minutes, 4-6 revs/min of rotary drum；When ph detection 4.0,2-3h, rotary drum 4-6 are continued to rotate Rev/min；The water temperature in rotary drum is raised to 40-45 degree later, turns 2-3h, and 4-6 revs/min of rotary drum；Boiling water detects shrinkage temperature 80 Degree Celsius or more, stop rousing standing, finishes total 18-32h to standing since feeding intake.
(4) turn 1-2h, 2-4 revs/min；Flowing water cleans in room temperature rotary drum, rouses out；
8, degreasing
(1) the sturgeon skin weighing that step 7 is handled well；
(2) water of the 300-400% of the sturgeon skin weight of step 8 (1), the high temperature resistant nonionic degreasing agent of 3-4% are weighed；
(3) sturgeon skin and water being put into rotary drum, temperature is set in 60-70 degrees Celsius, it is added degreasing agent, 4-6 revs/min, Rotation 4-6 hours, 55-60 degrees Celsius of hot water cleaning, drum controls water out；
9, retanning
(1) the sturgeon skin weighing that step 8 is handled well；
(2) water of the 100-200% of 9 (1) sturgeon skin weight is weighed, the acrylic acid of the formic acid of 0.3-0.6%, 2-4% is multiple Tanning agent, the white tannin of 4-8%, the anion fatting agent of 2-4%, the sodium bicarbonate of 0.5-1%；
(3) sturgeon skin and water are put into rotary drum, temperature is set in 42-44 degrees Celsius, and the formic acid after dilution is added turns 20- 40 minutes；White tannin is added and turns 1-3h, acrylic acid double tanning agent is added, anion fatting agent turns 1-3h, 3-4 equivalent is divided to add Sodium bicarbonate after entering dilution, turns 30-50 minute every time, and rotary drum revolving speed is 4-6 revs/min, then stops to rouse, standing, from feeding intake Start to the standing end time to amount to 18-32 hours；
(4) stand after, rotate 1-2h, 4-6 revs/min；It when solution ph detection 4.0, sufficiently washes, out drum control water；
10, it neutralizes
(1) the sturgeon skin weighing that step 9 is handled well；
(2) water of the 100-200% of step 10 (1) sturgeon skin weight, the neutralization tannin of 2-4%, the tannin of 1-2% are weighed Essence, the sodium formate of 1-2%, the sodium bicarbonate of 0.5-1%；
(3) sturgeon skin and water are put into rotary drum, temperature is set in 42-44 degrees Celsius, and neutralization tannin is added and turns 20-40 points Clock is added tannin essence and turns 20-40 minutes；Formic acid is added and receives and turns 20-40 minutes；Sodium bicarbonate average mark 3-4 times after dilution is added Enter, turns 20-40 points every time；The above rotary drum revolving speed is 2-4 revs/min.
(4) terminal: solution ph detects 5-6；
(5) sturgeon skin is sufficiently washed, and controls water naturally；
Two, soft dyeing is done
1, it falls soft
Vacancy in flesh noodles bone plate is filled up with hot melt adhesive, while sturgeon leather is put on into protective bag, is then charged into and falls soft drum Fall it is 6-7 hours soft, 10-15 revs/min of rotary drum；
2, by fall it is soft after sturgeon skin sufficiently wash, control water；
3, secondary retanning,
(1) the 2 sturgeon skin weighing handled well in step 2；
(2) water of the 100-200% of step 23 (1) sturgeon skin weight, acrylic acid double tanning agent, the 2-4% of 2-4% are weighed Fluoropolymer resin retanning agent, 4-6% wattle extract (soft), the sodium bicarbonate of 1-2%；
(3) sturgeon skin and water are put into rotary drum, temperature is set in 42-44 degrees Celsius, and acrylic acid double tanning agent is added, turns 50- 70 minutes, resin tanning agent is added and turns 50-70 minutes, tannin extract is added and turns 50-70 minutes, rotary drum revolving speed is 4-6 revs/min；It is flat The respectively 3-4 sodium bicarbonate being added after dilution turns 20-40 minutes every time, 4-6 revs/min of revolving speed, when ph detection 5.5, fills Divide washing, out drum control water；
4, dyeing and fat-liquoring
(1) the sturgeon skin weighing that step 23 is handled well；
(2) water of the 100-200% of weighing stage 24 (1) sturgeon skin weight, the phosphatide fatting agent of 4-6%, 2-4% Neat's foot oil, the lanolin fatting agent of 6-8%, the levelling agent of 1-2%, 1-2% formic acid, the dyestuff of 1-3%
(3) sturgeon skin and water are put into rotary drum, temperature is set in 45-55 degrees Celsius, and levelling agent is added and turns 8-12 minutes, adds Enter dyestuff to turn 30-50 minutes, neat's foot oil is added and turns 50-70 minutes, phosphatide fatting agent is added and turns 50-70 minutes, lanolin is added Fatting agent turns 50-70 minutes, and the average mark 2-3 times formic acid being added after dilution turns 30 minutes, the above process rotary drum revolving speed every time It is 10-15 revs/min, then drain control water is sufficiently washed in rotary drum, control water；
7, toggling
8, water spray eases back
Sturgeon leather after drying is uniformly sprayed water in flesh noodles, then 24-48h is stacked in sealing；
9, it falls soft
It falls soft 21 and falls soft method the same, time 2-4 hour；
10, toggling
11, sand paper polishes
12, high temperature presses
Ironing is using the leather embossing machine after repacking；Leather embossing machine after the repacking, the part of repacking are leather The heating platen of embossing machine and corresponding bottom plate；The bottom plate is equipped with groove, and the size of groove is slightly larger than the main bone of sturgeon skin Plate protrusion；The contact surface of the heating platen and leather, is provided with high temperature-resistant felt；
The mandarin sturgeon and acipenser dabryanus derives from the population of artificial breeding.
In the process described above, it is preferred that the high temperature-resistant felt with a thickness of 2cm；The length that groove is arranged is 100cm, depth 1.5cm, width 5cm.
In the process described above, it is preferred that the temperature of the heating platen be 100 degrees Celsius, pressure be 200 kilograms/ Square centimeter presses the time about 2--3 seconds.
Compared with prior art, the invention has the following advantages that
1, tanned sturgeon leather is soft, plentiful, bone plate is intact, surface is smooth；
2, marketing is easy to without chrome tanning process using completely new environmental protection；
3, very different degreasing agent and degreasing method is selected to carry out different lubricant components in different tanning processes Degreasing respectively, it is cleaner than sturgeon skin, clean and tidy with conventional method after degreasing, it is easy to subsequent operation；
4, reach 90% or more using the tanned sturgeon leather quality percentage of the present invention, substantially exceed traditional process for tanning 30% yield rate；
5, bone plate and leather connecting portion package are close, adapt to the demand of wide-angle bending in leather shoes process completely.
Detailed description of the invention
Fig. 1 be degreasing completely with the sordid sturgeon leather schematic diagram of degreasing；
Wherein, a is to utilize the clean sturgeon scytoblastema of method degreasing of the invention；
B is degreasing method treated the sturgeon scytoblastema using the prior art.
Fig. 2 is the heating platen of improved leather embossing machine and the structural schematic diagram of bottom plate；
Wherein, 1- felt；2- groove.
Fig. 3 is the soft correction of the sturgeon skin for the acipenser dabryanus that preparation is completed.
Fig. 4 is to be filled with the sturgeon skin schematic diagram of hot melt adhesive in bone plate recess.
Specific embodiment
Technical solution of the present invention is if not otherwise specified the ordinary skill in the art；The reagent or material, If not otherwise specified, commercial channel is derived from.The mandarin sturgeon and acipenser dabryanus that the embodiment of the present invention uses derive from artificial support The population grown.
Embodiment 1:
The soft correction processing method of the sturgeon skin of acipenser dabryanus and mandarin sturgeon, includes the following steps:
According to the conventional cognitive of this field, sturgeon skin weight of the present invention refers both to be the weight in wet base of sturgeon skin；Each step On the basis of the percentage additive amount of raw material used in the rapid weight of the sturgeon skin involved in each step.
One, sturgeon skin degreasing tanning
1, rotary drum immersion, pre- degreasing
(1) material selection chooses the wet salted hide of the acipenser dabryanus of 20 kilogram weights, 18-22 degree water temperature in rotary drum, sufficiently washing sturgeon Fish-skin is weighed after washing.
(2) 1% immersion agent (BASF EusaponW) of the sturgeon skin weight of step (1) acquisition, 1% sterilization are weighed Agent (bright Sheng CISMOLLAN AN 90), 2% degreasing agent (fraternal chemical industry H900), 200% water；
(3) immersion carries out pre- degreasing to sturgeon skin, mainly removal surface grease, prepares for liming workshop section
Sturgeon skin and water are put into rotary drum, mix up 22 degrees Celsius of temperature value, immersion agent, fungicide, degreasing agent is then added, Rotary drum is rotated, 2 revs/min of rotary drum revolving speed, turns to stop 45 minutes for 15 minutes, revolving speed cannot be too fast, so as not to it is rubbed between sturgeon skin Weight destroys the decorative pattern on sturgeon skin surface, terminates total 48h certainly feeding intake to start to rotary drum rotation.Then flowing water cleans 20 points in rotary drum Clock, drum controls water out.
2, mechanical degreasing
(1) upward by the sturgeon skin flesh noodles for having soaked water, it is fixed on panel, scissors removes fin, with electronic 80 mesh steel wire Brush or 80 mesh nylon bruss high speed rotations remove the flesh of fish, fat.
(2) meat and the sturgeon skin warm water of fat will have been gone to clean up, has controlled water.
3, liming degreasing
(1) the sturgeon skin weighing that the mechanical degreasing of step 2 obtains after cleaning；
(2) weighing 1.0% NaHS of sturgeon skin weight in step 3 (1), (content 70%, 70% refers to sulphur herein Sodium hydride effective content, sheet-like particle), 10% lime, 0.5% auxiliary liming agent (bright Sheng CISMOLLAN BH-C), 2% Degreasing agent (fraternal chemical industry H900), 300% water；
(3) ready sturgeon skin and water are put into rotary drum, sets 20 degrees Celsius of temperature, rotate rotary drum, 4 turns of revolving speed/ Minute, degreasing agent is added, the dissolved NaHS of water rotates 1h；Auxiliary liming agent, lime are added, turns to stop 50 points in 10 minutes Clock, 2 revs/min of rotary drum revolving speed, start of calculation to the rotary drum rotation end time that feeds intake certainly amounts to 48h.
Terminal: sturgeon skin expansion is uniform, strong solution ph > 12 of skin body.
Washing: rotary drum room temperature flowing water is washed 2 times 10 minutes every time, 4 revs/min.
(4) secondary fleshing, fat (method is with 2).
4, deliming degreasing
(1) step 3 treated sturgeon skin weighing；
(2) 1% ammonium sulfate of step 4 (1) sturgeon skin weight is weighed, 1% degreasing agent (BASF Eusapon OC), 100% water, 0.5% deliming auxiliary agent (BASF)
(3) sturgeon skin and water are put into rotary drum, sets 33 degrees Celsius of temperature, ammonium sulfate, degreasing agent and deliming is added and helps Agent, turns 2h by 2 revs/min of rotary drum revolving speed,
(4) terminal: phenolphthalein indicator shows notch 1/5--1/6 red heart,
(5) it washes: rotary drum warm water (33--36 degrees Celsius) sufficiently cleaning 2 times, every time 20 minutes, 4 revs/min.After cleaning, Fish-skin surface neat and tidy, soft, removal is clean substantially for surface solid grease.
5, soften
(1) the sturgeon skin weighing that step 4 is handled well；
(2) 100% water of the sturgeon skin weight of step 5 (1), 1% pancreatin, 0.5% ammonium sulfate are weighed；
(3) sturgeon skin and water are put into rotary drum, sets 35-37 degrees Celsius of water temperature, pancreatin and ammonium sulfate is added, rotary drum turns 4 revs/min of speed rotates 1h；
(4) terminal: grain is smooth, pure white, and finger pressure has fingerprint, the flexible consolidation of skin body
(5) wash: 35--37 degrees Celsius of warm water is sufficiently washed 10 minutes in rotary drum, and 20--24 degrees Celsius of room temperature is washed 10 points Clock, 2 revs/min of rotary drum.
6, pickling
(1) the sturgeon skin weighing that step 5 is handled well；
(2) 100% water of the sturgeon skin weight of step 6 (1), 16% salt, 2% acetic acid, 2% dense sulphur are weighed Acid, 2% nonionic degreasing agent (BASF Eusapon OE)；
(3) sturgeon skin and water are put into rotary drum, sets 21 degrees Celsius of temperature, salt and nonionic degreasing agent is added, turned Turn drum, rotates 30 minutes by 1 rev/min；After the dilution of equivalent is added in two portions acetic acid (acetic acid by its 10 times of weight water Dilution), turn 30 minutes every time, turns 4 revs/min；Then the concentrated sulfuric acid (diluting by the water of 10 times of weight) point 4 after diluting is inferior Amount is added, and turns 30 minutes, 4 revs/min of revolving speed every time；Rotary drum, which is set in, after the completion turns to stop 50 minutes for 10 minutes, and 2 turns of revolving speed/ Minute, 36h is amounted to the rotation end time since feeding intake；
(4) terminal: surface is astringent, and skin body is flexible, consolidation, solution ph 2.5；
(5) degreasing: taking out sturgeon skin under sour skin state, removes solid fat (method is with 2) again on dry panel, It is put into former pickling liquid again after sturgeon skin weighing；
7, tanning
(1) 2% modified glutaraldehyde of the sturgeon skin weight of step 6 is weighed, 1.5% aluminium tanningagent, 10% white tannin, 10% white tannin extract, 1% formic acid are received, 1.5% sodium bicarbonate, 1% mould inhibitor；
(2) it operates
It is carried out in former pickling liquid, sets 24 degrees Celsius of temperature, modified glutaraldehyde is added, and (weight ratio, material-water ratio 1:5 are dilute Release), rotate 1.5h, 4 revs/min；Aluminium tanningagent is added, turns 1h, 4 revs/min of rotary drum；It is added white tannin, white tannin extract turns 4h, and 4 Rev/min；Stop rousing standing, be finished altogether for 24 hours since feeding intake to standing.
(3) formic acid being added to receive, mould inhibitor turns 1h, and 4 revs/min；Divide 8 equivalent that sodium bicarbonate (20 times of weights after dilution are added Measure the 35 DEG C waters dissolution of part), turn 40 minutes, 4 revs/min of rotary drum every time；When ph detection 4.0,2h is continued to rotate, 4 Rev/min；The water temperature in rotary drum is raised to 40 degree later, turns 2h, and 4 revs/min；Boiling water detects 80 degrees Celsius of shrinkage temperature or more, Stop rousing standing, be finished altogether for 24 hours since feeding intake to standing.
(4) turn 1h, 2 revs/min；Flowing water cleans 20 minutes in room temperature rotary drum, and drum prepares degreasing out.
8, degreasing
Due to the particularity of sturgeon leather, it is different from common leather, grease is difficult once to purify, so this step is closed very much Key is done well, and the quality of end product is seriously affected.
(1) the sturgeon skin weighing that step 7 is handled well；
(2) 400% water of the sturgeon skin weight of step 8 (1), 4% high temperature resistant nonionic degreasing agent (BASF are weighed Eusapon OC, fraternal chemical industry H901,1:1 mass ratio mixing)；
(3) sturgeon skin and water are put into rotary drum, temperature is set in 65 degrees Celsius, and degreasing agent is added, 6 revs/min, rotates 6 Hour, 55-60 degrees Celsius of hot water cleans 2 times, and 10 minutes every time, drum controlled water out.
Sturgeon leather after degreasing, a is in uniform light blue white as shown in figure 1, and leather fiber fully opens, and finger pressure has fluffy Feel, the natural oil in sturgeon leather removes completely substantially, and skin is strong, without rotten skin, surface cleaning, in addition to leather smells, without it He is pungent taste.Sturgeon leather is sent to SGS mechanism and is detected, and detection is to end 2015 based on European chemical balance motion administration High concern substance candidate list (according to No. 1907/2006 REACH regulation of European Union) for authorization review announced December 17, Screening test is carried out to 168 kinds high concern substance (SVHC), while lead content is detected, detection content and result are as follows:
According to specific test scope and analytical technology, the high concern material concentration tested in sample is entrusted to be both less than The testing result of 0.1% lead is as follows:
Remarks:
1) 1mg/kg=0.0001%
(2) MDL=method detection limit
(3) (< MDL) is not detected in ND=
(4) "-"=do not provide
Lead (Pb)
Test method: it is measured referring to US EPA method 3052:1996, analysis is carried out using ICP-OES
9, retanning
(1) the sturgeon skin weighing that step 8 is handled well；
(2) 100% water of 9 (1) sturgeon skin weight is weighed, 0.3% formic acid, 2% acrylic acid double tanning agent, 4% Bai Danning, 2% anion fatting agent, 0.5% sodium bicarbonate；
(3) sturgeon skin and water are put into rotary drum, temperature is set in 44 degrees Celsius, formic acid (1: 10 times of water after dilution is added Dilution, weight ratio), turn 30 minutes；White tannin is added and turns 2h, acrylic acid double tanning agent is added, anion fatting agent turns 2h；Divide 4 The sodium bicarbonate after dilution (1:20 times of water dilution of weight ratio) is added in secondary equivalent, turns 40 minutes every time, the above rotary drum revolving speed is 4 Rev/min, then stop to rouse, stand, is amounted to 24 hours since feeding intake to the standing end time；
(4) stand after, rotate 1h, 4 revs/min；When solution ph detection 4.0,35-40 DEG C water is sufficiently cleaned 2 times, 10 minutes every time, drum controlled water out；
10, it neutralizes
(1) the sturgeon skin weighing that step 9 is handled well；
(2) 100% water of step 10 (1) sturgeon skin weight, 2% neutralization tannin, 2% tannin essence (PAK- are weighed The bright Sheng of N-C), 1% sodium formate, 0.5% sodium bicarbonate；
(3) sturgeon skin and water are put into rotary drum, temperature is set in 44 degrees Celsius, is added and neutralizes tannin turn 30 minutes；It is added Tannin essence turns 30 minutes；Formic acid is added and receives and turns 30 minutes；By sodium bicarbonate (1:20 times of water dilution of weight ratio) average mark after dilution 3 additions, turn 30 minutes every time；The above rotary drum revolving speed is 2 revs/min.
(4) terminal: solution ph detection 5.5；
(5) 40 degrees Celsius of sturgeon skin sufficiently cleaning 2 times, 10 minutes every time, rouse out, control water for 24 hours naturally, do for next procedure Prepare.
Two, soft dyeing is done
1, it falls soft
Main bone plate is empty among sturgeon leather after tanning degreasing, directly fall it is soft be easy to break bone plate, Vacancy in flesh noodles bone plate is filled up (Fig. 4) with hot melt adhesive, while sturgeon leather is put on into protective bag, is then charged into and falls soft drum Fall soft 6 hours, 12 revs/min of rotary drum, through falling it is soft after the fiber of sturgeon skin sufficiently open, be conducive to the filling of subsequent material；
2, by fall it is soft after sturgeon leather sufficiently cleaned with 35-40 DEG C water, control water weighing
3, secondary retanning,
(1) the 2 sturgeon skin weighing handled well in step 2；
(2) 100% water of step 23 (1) sturgeon skin weight, 2% acrylic acid double tanning agent (BASF), 2% are weighed Fluoropolymer resin retanning agent (BASF), 4% wattle extract (soft), 1% sodium bicarbonate；
(3) sturgeon skin and water being put into rotary drum, temperature is set in 44 degrees Celsius, and acrylic acid double tanning agent is added, turn 60 minutes, Resin tanning agent is added to turn 60 minutes, tannin extract is added and turns 60 minutes, rotary drum revolving speed is 4 revs/min；Averagely it is added three times dilution Sodium bicarbonate (1:20 times warm water dilution, parts by weight) afterwards, turns 30 minutes every time, and 4 revs/min of revolving speed, when ph detection 5.5, so Room temperature flowing water cleans 20 minutes in rotary drum afterwards, drum control water weighing out.
4, dyeing and fat-liquoring
(1) the sturgeon skin weighing that step 23 is handled well；
(2) 100% water of weighing stage 24 (1) sturgeon skin weight, 4% phosphatide fatting agent, 2% neat's foot oil (brother Younger brother's chemical industry), 6% lanolin fatting agent (Lang Sheng), 1% levelling agent (BASF FR-DE), 1% formic acid, 1% dye Material；
(3) sturgeon skin and water are put into rotary drum, temperature is set in 50 degrees Celsius, and levelling agent is added and turns 10 minutes, dye is added Material turns 40 minutes, and neat's foot oil is added and turns 60 minutes, and phosphatide fatting agent is added and turns 60 minutes, and lanolin fatting agent is added and turns 60 points Clock, the formic acid (1:10 times of water dilution of weight ratio) after dilution is averagely added in two portions, turns 30 minutes, the above process rotary drum every time Revolving speed is 10 revs/min, drain control water, and then twice, 10 minutes every time, drum was piled up out for room temperature washing in rotary drum, controls water 24h。
7, toggling
8, water spray eases back
Sturgeon leather after drying is uniformly sprayed water into (30% of the sturgeon leather weight after water about drying) in flesh noodles, Then 24-48h is stacked in sealing；
9, it falls soft
Falling soft 21, to fall soft method the same, and the time 3 hours.
10, toggling
11,1000 mesh Germany import warrier's sand paper polish
12, high temperature presses
The ironing of sturgeon leather is indispensable link during sturgeon leather finish, and ironing is using the leather pressure after repacking Flower machine (RG-SY)；
Leather embossing machine after the repacking, the part of repacking are the heating platen and corresponding bottom plate of leather embossing machine； The bottom plate is equipped with groove, and the size of groove is raised slightly larger than the main bone plate of sturgeon skin；The heating platen and leather Contact surface is provided with high temperature-resistant felt, thickness felt 2cm；
The present embodiment is in view of the size of the acipenser dabryanus bone plate of required processing, and the length that groove is arranged is 100cm, and depth is 1.5cm, width 5cm.
When ironing processing, the protrusion of the main bone plate of sturgeon leather is placed in the groove of bottom plate, the temperature of heating platen is 100 Degree Celsius, pressure is 200 kg/cms, is pressed the time about 2--3 seconds.
13, the covering with paint that the sturgeon leather that ironing is put in order is carried out to different-style as requested, such as bloom, dumb light, cloudy surface Deng, meet the requirement (Fig. 3) of different upper leathers, from figure 3, it can be seen that the sturgeon leather handled using method provided by the invention, Surface is complete, can arbitrarily bend, and has splendid flexibility, is suitble to do upper leather.

Claims (3)

1. the soft correction processing method of the sturgeon skin of acipenser dabryanus and mandarin sturgeon, includes the following steps:
One, sturgeon skin degreasing tanning
1, rotary drum immersion, pre- degreasing
(1) wet salted hide of material selection acipenser dabryanus or mandarin sturgeon, sufficiently washing sturgeon skin, weigh after washing；
(2) 0.51% immersion agent of the sturgeon skin weight of step (1) acquisition, the fungicide of 1-2%, the degreasing agent of 1-2% are weighed (fraternal chemical industry H900), the water of 200-300%；
(3) it soaks: sturgeon skin and water being put into rotary drum, mix up 20-22 degrees Celsius of temperature value, immersion agent, sterilization is then added Agent, degreasing agent rotate rotary drum, and 2-4 revs/min of rotary drum revolving speed turns to stop within 10-20 minutes 40-50 minutes, feed intake and are started to rotary drum certainly Rotation terminates total 36-48h, and then flowing water cleans in rotary drum, out drum control water；
2, mechanical degreasing
(1) upward by the sturgeon skin flesh noodles for having soaked water, fin is removed, removes the flesh of fish, fat with wire brush or nylon bruss；
(2) meat and the sturgeon skin warm water of fat will have been gone to clean up, has controlled water；
3, liming degreasing
(1) the sturgeon skin weighing that the mechanical degreasing of step 2 obtains after cleaning；
(2) weigh step 3(1) in sturgeon skin weight 1.0-1.5% NaHS particle (effective content 60-80%), 10- 15% lime, the auxiliary liming agent of 0.5-1%, the water of the degreasing agent of 1-2%, 300-400%；
(3) ready sturgeon skin and water are put into rotary drum, sets 20-24 degrees Celsius of temperature, 4-6 revs/min of revolving speed, is added Degreasing agent, NaHS rotate 1h；Auxiliary liming agent, lime are added, turns to stop within 5-15 minutes 40-60 minutes, rotary drum revolving speed 2-3 Rev/min, start of calculation to the rotary drum rotation end time that feeds intake certainly amounts to 48-60h；
Terminal: sturgeon skin expansion is uniform, strong solution ph > 12 of skin body；
Washing: rotary drum room temperature flowing water washes sturgeon skin；
(4) secondary mechanical fleshing, fat；
4, deliming degreasing
(1) step 3 treated sturgeon skin weighing；
(2) step 4(1 is weighed) ammonium sulfate of the 1-1.5% of sturgeon skin weight, the degreasing agent of 1-1.5%, the water of 100-200%, The deliming auxiliary agent of 0.5-1%；
(3) sturgeon skin and water are put into rotary drum, sets 33-36 degrees Celsius of temperature, ammonium sulfate, degreasing agent and deliming is added and helps Agent, 2-4 revs/min of rotary drum revolving speed, turns 1-2h,
(4) terminal: phenolphthalein indicator shows notch 1/5--1/6 red heart,
(5) wash: rotary drum warm water sufficiently cleans；
5, soften
(1) the sturgeon skin weighing that step 4 is handled well；
(2) weigh step 5(1) sturgeon skin weight 100-200% water, the pancreatin of 0.5- 1%, the ammonium sulfate of 0.5-1%；
(3) sturgeon skin and water are put into rotary drum, sets 35-37 degrees Celsius of water temperature, pancreatin and ammonium sulfate, rotary drum revolving speed 4- is added 6 revs/min, rotate 1-1h；
(4) terminal: grain is smooth, pure white, and finger pressure has fingerprint, the flexible consolidation of skin body
(5) wash: warm water is sufficiently washed；
6, pickling
(1) the sturgeon skin weighing that step 5 is handled well；
(2) weigh step 6(1) sturgeon skin weight 100-200% water, the salt of 10-16%, the acetic acid of 1-2%, 2-2.5% The concentrated sulfuric acid, the nonionic degreasing agent of 1-2%；
(3) sturgeon skin and water are put into rotary drum, sets 21-23 degrees Celsius of temperature, salt and nonionic degreasing agent, rotation is added Rotary drum, rotates 25-35 minutes by 1-2 revs/min；Acetic acid after dividing the dilution of 2-3 addition equivalent, turns 25-35 minutes every time, Turn 4 revs/min；Then the concentrated sulfuric acid after diluting divides the addition of 3-5 equivalent, turns 25-45 minutes every time, and 4-6 revs/min of revolving speed, Rotary drum, which is set in, after the completion turns to stop for 5-15 minutes 40-60 minutes, 2-4 revs/min of revolving speed, terminates since feeding intake to rotary drum rotation Total 24-36h；
(4) terminal: surface is astringent, and skin body is flexible, consolidation, solution ph 2.0-3.0；
(5) degreasing: taking out sturgeon skin under sour skin state, mechanical degreasing is put into former pickling liquid again after sturgeon skin weighing；
7, tanning
(1) modified glutaraldehyde of the 2-4% of the sturgeon skin weight of step 6, the aluminium tanningagent of 1-1.5%, the white pellet of 8-10% are weighed Rather, the white tannin extract of 8-10%, the formic acid of 1-1.5% are received, the sodium bicarbonate of 1.5-2%, the mould inhibitor of 1-1.5%；
(2) it operates
It being carried out in former pickling liquid, sets 22-24 degrees Celsius of temperature, the modified glutaraldehyde after dilution is added rotates 1-1.5h, 4-6 revs/min；Aluminium tanningagent is added, turns 1-2h, 4-6 revs/min of rotary drum；It is added white tannin, white tannin extract turns 4h, and 4-6 revs/min Clock；Stop rousing standing, finishes total 18-32h to standing since feeding intake；
(3) formic acid is added after standing to receive, mould inhibitor turns 1-2h, and 4-6 revs/min；Divide 5-8 equivalent that the little Su after dilution is added It beats, turns every time 30-50 minutes, 4-6 revs/min of rotary drum；When ph detection 4.0,2-3h is continued to rotate, 4-6 revs/min of rotary drum； The water temperature in rotary drum is raised to 40-45 degree later, turns 2-3h, and 4-6 revs/min of rotary drum；Boiling water detect 80 degrees Celsius of shrinkage temperature with On, stop rousing standing, finishes total 18-32h to standing since feeding intake；
(4) turn 1-2h, 2-4 revs/min；Flowing water cleans in room temperature rotary drum, rouses out；
8, degreasing
The sturgeon skin weighing that step 7 is handled well；
Weigh step 8(1) sturgeon skin weight 300-400% water, the high temperature resistant nonionic degreasing agent of 3-4%；
(3) sturgeon skin and water are put into rotary drum, temperature is set in 60-70 degrees Celsius, and degreasing agent is added, 4-6 revs/min, rotates 4-6 hours, 55-60 degrees Celsius of hot water cleaning, drum controlled water out；
9, retanning
(1) the sturgeon skin weighing that step 8 is handled well；
(2) 9(1 is weighed) water of the 100-200% of sturgeon skin weight, the formic acid of 0.3-0.6%, the acrylic acid double tanning agent of 2-4%, 4- 8% white tannin, the anion fatting agent of 2-4%, the sodium bicarbonate of 0.5-1%；
(3) sturgeon skin and water are put into rotary drum, temperature is set in 42-44 degrees Celsius, and the formic acid after dilution is added turns 20-40 points Clock；White tannin is added and turns 1-3h, acrylic acid double tanning agent is added, anion fatting agent turns 1-3h, divide 3-4 equivalent that dilution is added Sodium bicarbonate afterwards turns 30-50 minutes every time, and rotary drum revolving speed is 4-6 revs/min, then stops to rouse, stand, since feeding intake to Stand end time total 18-32 hours；
(4) stand after, rotate 1-2h, 4-6 revs/min；It when solution ph detection 4.0, sufficiently washes, out drum control water；
10, it neutralizes
(1) the sturgeon skin weighing that step 9 is handled well；
(2) step 10(1 is weighed) water of the 100-200% of sturgeon skin weight, the neutralization tannin of 2-4%, the tannin essence of 1-2%, 1-2% Sodium formate, the sodium bicarbonate of 0.5-1%；
(3) sturgeon skin and water are put into rotary drum, temperature is set in 42-44 degrees Celsius, and neutralization tannin is added and turns 20-40 minutes, adds Enter tannin essence to turn 20-40 minutes；Formic acid is added and receives and turns 20-40 minutes；Sodium bicarbonate average mark 3-4 times after dilution is added, when Between interval 20-40 point；The above rotary drum revolving speed is 2-4 revs/min；
(4) terminal: solution ph detects 5-6；
(5) sturgeon skin is sufficiently washed, and controls water naturally；
Two, soft dyeing is done
1, it falls soft
Vacancy in flesh noodles bone plate is filled up with hot melt adhesive, while sturgeon leather is put on into protective bag, be then charged into fall soft drum fall it is soft 6-7 hours, 10-15 revs/min of rotary drum；
2, by fall it is soft after sturgeon skin sufficiently wash, control water；
3, secondary retanning,
(1) the 2 sturgeon skin weighing handled well in step 2；
(2) step 2 3(1 is weighed) water of the 100-200% of sturgeon skin weight, the polymer of the acrylic acid double tanning agent of 2-4%, 2-4% The wattle extract (soft) of resin retaning agent, 4-6%, the sodium bicarbonate of 1-2%；
(3) sturgeon skin and water are put into rotary drum, temperature is set in 42-44 degrees Celsius, and acrylic acid double tanning agent is added, and turns 50-70 points Clock is added resin tanning agent and turns 50-70 minutes, and tannin extract is added and turns 50-70 minutes, rotary drum revolving speed is 4-6 revs/min；Average mark The 3-4 sodium bicarbonate being added after dilution, turns 20-40 minute every time, and 4-6 revs/min of revolving speed, when ph detects 5.5, abundant water It washes, out drum control water；
4, dyeing and fat-liquoring
(1) the sturgeon skin weighing that step 23 is handled well；
(2) two 4(1 of weighing stage) sturgeon skin weight 100-200% water, the phosphatide fatting agent of 4-6%, 2-4% neat's foot oil, The lanolin fatting agent of 6-8%, the levelling agent of 1-2%, 1-2% formic acid, the dyestuff of 1-3%
(3) sturgeon skin and water are put into rotary drum, temperature is set in 45-55 degrees Celsius, and levelling agent is added and turns 8-12 minutes, dye is added Material turns 30-50 minutes, and neat's foot oil is added and turns 50-70 minutes, and phosphatide fatting agent is added and turns 50-70 minutes, lanolin stuffing is added Agent turns 50-70 minutes, and the average mark 2-3 times formic acid being added after dilution turns 30 minutes every time, and the above process rotary drum revolving speed is 10-15 revs/min, then drain control water is sufficiently washed in rotary drum, controls water；
7, toggling
8, water spray eases back
Sturgeon leather after drying is uniformly sprayed water in flesh noodles, then 24-48h is stacked in sealing；
9, it falls soft
It falls soft 21 and falls soft method the same, time 2-4 hour；
10, toggling
11, sand paper polishes
12, high temperature presses
Ironing is using the leather embossing machine after repacking；Leather embossing machine after the repacking, the part of repacking are leather embossing The heating platen of machine and corresponding bottom plate；The bottom plate is equipped with groove, and the size of groove is convex slightly larger than the main bone plate of sturgeon skin It rises；The contact surface of the heating platen and leather, is provided with high temperature-resistant felt；
The mandarin sturgeon and acipenser dabryanus derives from the population of artificial breeding.
2. according to the method described in claim 1, it is characterized by: the high temperature-resistant felt with a thickness of 2cm；Groove is set Length be 100cm, depth 1.5cm, width 5cm.
3. according to the method described in claim 1, pressure is 200 public it is characterized by: the temperature of heating platen is 100 degrees Celsius Jin/square centimeter presses the time about 2--3 seconds.
CN201910325127.3A 2018-12-10 2019-04-22 Method for processing soft shoe upper leather of sturgeon skin of Yangtze river sturgeon and Chinese sturgeon Active CN110004254B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110656209A (en) * 2019-09-27 2020-01-07 四川大学 Method for making leather from sturgeon skin

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Publication number Priority date Publication date Assignee Title
CN102199676A (en) * 2011-04-12 2011-09-28 王学川 Sturgeon skin chrome tanning leather production process
CN102839236A (en) * 2012-09-29 2012-12-26 桐乡市雄鹰皮草有限公司 Dual-purpose modification process for native breed sheepskin leather
CN104774980A (en) * 2015-03-23 2015-07-15 浙江金鑫皮革有限公司 Goat instep leather manufacturing technology

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102199676A (en) * 2011-04-12 2011-09-28 王学川 Sturgeon skin chrome tanning leather production process
CN102839236A (en) * 2012-09-29 2012-12-26 桐乡市雄鹰皮草有限公司 Dual-purpose modification process for native breed sheepskin leather
CN104774980A (en) * 2015-03-23 2015-07-15 浙江金鑫皮革有限公司 Goat instep leather manufacturing technology

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110656209A (en) * 2019-09-27 2020-01-07 四川大学 Method for making leather from sturgeon skin
CN110656209B (en) * 2019-09-27 2021-01-19 四川大学 Method for making leather from sturgeon skin

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