CN107988451A - It is a kind of to make the soft method for falling line leather using inferior grade wet blue leather - Google Patents
It is a kind of to make the soft method for falling line leather using inferior grade wet blue leather Download PDFInfo
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- CN107988451A CN107988451A CN201711058793.2A CN201711058793A CN107988451A CN 107988451 A CN107988451 A CN 107988451A CN 201711058793 A CN201711058793 A CN 201711058793A CN 107988451 A CN107988451 A CN 107988451A
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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
- C14C13/00—Manufacture of special kinds or leather, e.g. vellum
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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
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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
- C14B1/26—Leather tensioning or stretching frames; Stretching-machines; Setting-out boards; Pasting boards
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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
- C14B1/58—Drying
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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
- C14C11/00—Surface finishing of leather
- C14C11/003—Surface finishing of leather using macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C9/00—Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes
- C14C9/02—Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes using fatty or oily materials, e.g. fat liquoring
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The present invention relates to leather-making technology technical field, a kind of method for falling line leather using inferior grade wet blue leather making softness is provided, the inferior grade wet blue leather selected is subjected to water squeezing shaving, rinsing → washing → neutralization → washing → stuffing → of weighing → ease back wash → go out bulging standing → water squeezing stretching, extension → extension dry it is dry 1. → softening → dyeing → washing → chromatography → washing → surface treatment → wash → go out bulging standing → water squeezing stretching, extension → extension dry it is dry 2. → flesh noodles water spray, standing → vibration is drawn soft → falls soft → covering with paint, the retanning of after-tanning wet processing workshop section is abandoned on the basis of traditional handicraft, filling, it is dried in vacuo three big processes, integrated operation short flow, it is adapted to quantitatively production and application, cost reduction 30%, yield of leather increase by 20%, finished leather is soft, it is light, it is plentiful flexible to remove from office body, decorative pattern is full, uniformly, utilization rate is high.
Description
Technical field
It is more particularly to a kind of to fall line leather using inferior grade wet blue leather making softness the present invention relates to leather-making technology technical field
Method.
Background technology
Inferior grade wet blue leather refers to that grain has the wet blue leather of the defects of loose side, thorn scuffing, blood muscle or disability.Inferior grade indigo plant is wet
The origin cause of formation of leather particularly may be divided into：1. animal produces in growth period or after slaughter, if animal is being formed growth period
Horsefly stings, abrades, tinea leprosy, branding etc., and what is produced after animal slaughtering retouches knife wound, erythema, knife hole etc.；2. raw material skin is to the place of wet blue leather
Inappropriate technology is managed, such as liming is insufficient causes blood muscle obvious for immersion, and the control such as temperature, mechanism is improper when immersion, liming, goes
Meat misoperation etc. causes loose side serious.The presence of these disabilities have impact on the appearance and utilization rate of leather, reduce leather quality,
Leather utilization rate is reduced, be easy to cause the wasting of resources.The utilization rate and leather quality for how lifting inferior grade wet blue leather are current
Leather industry needs the key technical problem solved.
And in leather quality requirements, pliability is to weigh an important indicator of leather quality characteristic, soft correction, soft
The leather products of the styles such as bag leather, clothing leather, furniture leather have pliability higher requirement.And the grease in wet blue leather is in tan
Preceding beam house is almost divided, and as the loss of moisture in leather, collagenous fibres are bonded together, mobility reduces, hand
Sense becomes stiff, and pliability is extremely low.Therefore, pliability is the crucial skill for needing to solve when inferior grade wet blue leather improves leather quality
Art problem.
The content of the invention
Therefore, in view of the problems of the existing technology, the present invention proposes that one kind makes softness using inferior grade wet blue leather and falls
Line leather method, it is described using inferior grade wet blue leather make softness fall line leather method abandon tan on the basis of traditional handicraft after
The retanning of wet-milling product workshop section, filling, three big processes of vacuum drying, use using natural materials for basis component modified material as
Fatting agent, ecological, environmental protective, infiltrates into leather internal layer, is firmly combined with, not easily runs off with leather fiber, assigns the feel of finished leather softness, together
Shi Caiyong phenol sulfonic acids condensation product improves the constancy of finished leather decorative pattern, and integrated operation short flow, is adapted to quantitatively production and application,
Cost reduction 30%, yield of leather increase by 20%, finished leather is soft, light, and leather body is plentiful flexible, and decorative pattern is full, uniform, utilizes
Rate is high.
To realize above-mentioned technical problem, the solution that the present invention takes is：One kind is made soft using inferior grade wet blue leather
The soft method for falling line leather, including following process：The inferior grade wet blue leather selected is subjected to water squeezing shaving, rinsing of weighing → ease back
→ washing → neutralization → washing → stuffing → wash → go out bulging standing → water squeezing stretching, extension → extension dry it is dry 1. → softening → dyeing →
Washing → chromatography → washing → surface treatment → wash → go out bulging standing → water squeezing stretching, extension → extension dry it is dry 2. → flesh noodles water spray, it is quiet
Put → it is soft to vibrate drawing → and fall soft → covering with paint.
It is further, with the percentages process of the weight of the inferior grade wet blue leather after the water squeezing shaving weighed
Auxiliary dosage, the rinsing process that eases back are：Add 1.8-2.2% aromatic series synthesizing amides, 200-250% water, bath temperature control
System rotates 30-35min at 38-42 DEG C.
It is further, with the percentages process of the weight of the inferior grade wet blue leather after the water squeezing shaving weighed
Auxiliary dosage, the neutralization step are：Add the compound of 2.5-3.5% acylates and syntans, 5-7% synthesis phosphorylations
Polymer, 200-250% water, rotates 120-150min；2.5-3% phenol sulfonic acid condensation products are added, rotate 30-40min, bath temperature
At 33-37 DEG C, pH value is controlled in 5.0-5.5 for control.
It is further, with the percentages process of the weight of the inferior grade wet blue leather after the water squeezing shaving weighed
Auxiliary dosage, the stuffing process are：The compound of 2-4% polycarboxylate compounds, 4-6% artificial oils and emulsifying agent is added,
200-250% water, bath temperature are controlled at 33-37 DEG C, and it is 4.0-4.4 to add formic acid tune pH value, rotate 30-40min；Add 6-8%
The compound of artificial oil and emulsifying agent, it is 3.5-3.7 to add formic acid tune pH value, rotates 30-40min.
It is further that the extension dries dry 1. crust leather moisture control in 12-16%.
It is further, with the percentages process of the weight of the inferior grade wet blue leather after the water squeezing shaving weighed
Auxiliary dosage, the softening process are：1-2% lecithin emulsions, 500-600% water are added, bath temperature is controlled in 48-52
DEG C, rotate 5-6h.
It is further that the extension dries dry 2. crust leather moisture control in 8-12%.
By using preceding solution, the invention has the advantages that of the present invention utilize inferior grade wet blue leather system
Make the method that softness falls line leather has following advantage relative to the prior art：
（1）In tanning technology field, retanning, filling work procedure can improve the crust leather grain degree of packing and leather body richness, and vacuum is done
Drying process can improve crust leather grain flatness and the flat fineness of pore, if common process without retanning, filling, Vacuum Drying Step,
The crust leather degree of packing, richness, grain flatness, the flat fineness of pore can be affected.It is and of the present invention blue using inferior grade
Wet leather makes softness and falls retanning, filling, vacuum that the method that line is removed from office abandons after-tanning wet processing workshop section on the basis of traditional handicraft
Dry three big processes, to avoid the situation of problem the defects of disability, loose side that inferior grade wet blue leather is increased because of numerous and diverse process, are improved
The utilization validity of inferior grade wet blue leather.Meanwhile in order to solve because retanning, filling, vacuum drying three big processes lack can caused by
Crust leather problem, the present invention in neutralization step employs phenol sulfonic acid condensation product, has the effect of stronger selective filling, can improve
The position of wet blue leather is poor, improves the uniformity of crust leather leather body without losing the degree of packing, richness, moreover it is possible to increase operation rate；Match somebody with somebody at the same time
Close and stretched using 2 water squeezings：First time water squeezing stretching, extension is carried out after crust leather stuffing, hangs drying process of drying in the air, on the one hand can improve base
The dispersed homogeneous degree of internal grease is removed from office, avoids the loss of grease, ensures the uniformity of crust leather entirety body bone pliability；On the other hand
Flatness, the flat fineness of pore of crust leather grain can be improved, and dried crust leather is returned when rousing softening, and collagenous fibres are easy to
Recover to soft and moist state, can ensure the plumpness of follow-up dyeing, the dye-uptake of chromatography process dyestuff and color.At surface
The crust leather managed carry out second of water squeezing stretching, extension, hang dry it is dry, further improve the flatness of crust leather grain, pore it is flat thin
Degree, and yield of leather can increase, dried crust leather carry out vibration draw it is soft, fall soft mechanically actuated when, crust leather collagenous fibres energy
Enough fully dispersed, pliability further improves, and helps subsequently to cover with paint, lacquer, colour wash, etc. operation.Therefore, the present invention can effectively improve crust leather grain
The flat fineness of surface evenness, pore, while also add yield of leather.
（2）The pliability of leather is to remove from office the group effect of surface and internal layer, to make soft leather, the surface of leather and internal layer are all
There must be good pliability.It is of the present invention to make the soft method for falling line leather in traditional handicraft using inferior grade wet blue leather
On the basis of abandon the after-tanning wet processing retanning of workshop section, filling, three big processes of vacuum drying.Synthesized using 1. small molecule aromatic series
Acid amides, the part chrome tanning agent tempering for combining wet blue leather surface are preliminary to improve leather body pliability.2. phenol sulfonic acid condensation product has one
Fixed relative molecular mass, various active group, with removing from office fiber interaction, fully dispersed collagenous fibres, enhancing leather body returns
Elasticity, reduction position is poor, improves the constancy of decorative pattern.3. polycarboxylate compound is combined with crust leather fiber, leather fiber is reduced
Surface tension, prevents from covering with paint, lacquer, colour wash, etc. the excessive penetration of workshop section's finishing agent, has ensured the pliability of finished leather indirectly.4. synthesize phosphorylation polymerization
Thing, the compound of artificial oil and emulsifying agent and lecithin emulsion be not oxidizable or becoming sour makes leather carry peculiar smell, meets
Environmental requirement.When moisture is sloughed in crust leather drying, limitation fiber bonding；When carrying out vibration and drawing soft, easily separate between fiber；
When crust leather stores, grease is not easy to lose, assigns crust leather soft, gentle, light feel.Crust leather drying shrinkage reduces, and must remove from office
Rate increases.5. crust leather returns drum sofening treatment, leather body pliability is further improved.6. the crust leather increase of water squeezing stretching machine tool operation twice
Fiber loosening degree, improves the flat fineness of grain, yield of leather increase.7. hanging the drying mode to dry in the air naturally contributes to fat migration to leather
Fiber internal layer, avoids grease from scattering and disappearing, and saves the energy, gained crust leather comfortable feel.Therefore, by described blue using inferior grade
Wet leather makes the method that softness falls line leather, can be good at covering grain defect, disability, and obtained finished leather decorative pattern is full, uniform,
Finished leather feel is soft, light, and leather body is plentiful flexible, meets the needs of market, wet blue leather utilization rate is very high, avoids wet blue leather
Phenomenon is overstock, reduces economic loss, and chemical materials cost reduction 30% in method implementation process, yield of leather increase by 20%, gives up
Liquid COD contents are greatly reduced, and practicality is high.
（3）The defects of being effectively directed to inferior grade wet blue leather of the invention, is improved to obtain soft leather：1. inferior grade indigo plant is wet
Remove from office position difference greatly, collagenous fibres are loosely uneven, and utilization rate is low, and this patent employs phenol sulfonic acid condensation product, it has selectivity
Filling effect, it is poor to improve the position of wet blue leather, increases operation rate；2. inferior grade wet blue leather leather body is shrivelled, this patent employs
Phosphorylated polymer, the compound of artificial oil and emulsifying agent and lecithin emulsion are synthesized as fatting agent, penetrating power is strong,
Collagenous fiber bundle periphery is combined or be wrapped in collagenous fibres, plays the role of lubricant fiber, and it is soft, plentiful to assign leather
Feel.
Embodiment
Carry out the embodiment that the present invention will be described in detail below with reference to specific embodiment, how skill is applied to the present invention whereby
Art means solve technical problem, and that reaches technique effect realizes that process can fully understand and implement according to this.If do not refer in particular to
Conventional means bright, that the technological means employed in embodiment is well known to those skilled in the art, used reagent and production
Product are also available commercial.The various processes and method not being described in detail are conventional methods as known in the art, used
Reagent is the common agents being commercially available by commercial sources.
It is a kind of to make the soft method for falling line leather using inferior grade wet blue leather, include the following steps：
Step（1）Water squeezing shaving, weigh：Choosing 2 grains has disability, the inferior grade wet blue leather of loose side, and shaving to thickness is
1.40-1.45mm weigh wet blue leather weight 14kg after shaving；
Step（2）Ease back rinsing：Add 0.28kg aromatic series synthesizing amides（Ten thousand tonneau chemical materials Co., Ltd of Xiamen City
CANAXIL POL）, 28kg water, bath temperature control is at 40 DEG C, rotation 30min, draining；
Step（3）Washing：42kg water is added, bath temperature is controlled at 35 DEG C, rotates 10min, draining；
Step（4）Neutralize：Add the compound of 0.42kg acylates and syntans（Guangdong Rui Zhan leather trades Co., Ltd
Tower nurse NA）, 0.84kg synthesis phosphorylated polymers（The SYNTHOL GS606 of simt＆zoon companies）, 24kg water, body lotion temperature
At 35 DEG C, pH value control rotates 150min 5.2 for degree control；Add 0.42kg phenol sulfonic acid condensation products（It is limited that remittance chemical industry is contained in Zhejiang
The Sheng tan pellet JR-309 of company）, rotate 40min, draining；
Step（5）Washing：Operation and step（3）Unanimously；
Step（6）Stuffing：Add 0.56kg polycarboxylate compounds（The SYNTHOL WP of simt＆zoon companies）, 0.56kg conjunctions
Into oil and the compound of emulsifying agent（The CANOIL SU of ten thousand tonneau chemical materials Co., Ltd of Xiamen City）, 0.07kg formic acid, 28kg
Water, at 35 DEG C, pH value control rotates 30min 4.2 for bath temperature control；Add the compounding of 1.12kg artificial oils and emulsifying agent
Thing（The CANOIL SU of ten thousand tonneau chemical materials Co., Ltd of Xiamen City）, 0.14kg formic acid, the control of body lotion pH value rotated 3.6
30min, draining；
Step（7）Washing：Operation and step（3）、（5）Unanimously；
Step（8）Go out bulging standing：Stand 12h,
Step（9）Water squeezing is stretched；
Step（10）Extension dry it is dry 1.：Naturally extension dries dry, and crust leather moisture is 13%；
Step（11）Softening：Add 0.14kg lecithin emulsions（The TANINIOL of Chengdu Pengzhou Ming Zhong Chemical Co., Ltd.s
HQ）, 84kg water, bath temperature control is at 50 DEG C, rotation 6h, draining；
Step（12）Dyeing：Add 0.28kg dyestuffs（The Leather Black NB of Jiangsu Ao Sheng enterprise developments Co., Ltd）,
0.28kg disperses tannin（The Sheng tan pellet JM of Zhejiang Shenghui Chemical Industry Co., Ltd）, 0.14kg acylates and syntans are answered
With thing（The tower nurse NA of Guangdong Rui Zhan leather trades Co., Ltd）, 14kg water, bath temperature control is at 35 DEG C, rotation 40min；
28kg water is added, temperature is increased to 50 DEG C, rotates 10min；0.21kg formic acid is added, body lotion pH is controlled in 3.6, rotation 40min,
Draining；
Step（13）Washing：42kg water is added, bath temperature is controlled at 50 DEG C, rotates 10min, draining；
Step（14）Chromatography：Add 0.07kg dyestuffs（The Leather Black NB of Jiangsu Ao Sheng enterprise developments Co., Ltd）,
42kg water, rotates 20min, adds 0.07kg formic acid, and at 50 DEG C, pH value control rotates 20min, row 3.4 for bath temperature control
Water；
Step（15）Washing：Operation and step（13）Unanimously；
Step（16）Surface treatment：Add 0.14kg surface conditioning agents（Clariant chemical industry（China）The CATALIX GS of Co., Ltd
LIQUID）, 42kg water, temperature control is at 50 DEG C, rotation 15min, draining；
Step（17）Washing：Operation and step（3）、（5）、（7）Unanimously；
Step（18）Go out bulging standing：Stand 12h；
Step（19）Water squeezing is stretched；
Step（20）Extension dry it is dry 2.：Operation and step（10）Unanimously, crust leather moisture is 10%；
Step（21）Flesh noodles water spray, stand：Crust leather flesh noodles is sprayed water, moisture 14-16%, stands 4h；
Step（22）Crust leather vibration is drawn soft；
Step（23）Crust leather falls soft 24h；
Step（24）Cover with paint, lacquer, colour wash, etc.：Cation back cover covering with paint → tumbling → Medium-layer Finishing of Leather → top finishing → tumbling → fall soft → tumbling →
Hand touch layer covering with paint → resultant Leather.
It is above-mentioned to make the soft method for falling line leather, after-tanning wet processing workshop section chemical materials cost drop using inferior grade wet blue leather
Low 30%, yield of leather increase by 20%；Also, using soft instrument（High Speed Rail Testing Instruments Co., Ltd, model：GT-303）To by upper
State the resultant Leather progress finished leather pliability detection for making softness using inferior grade wet blue leather and falling the method for line leather and preparing, testing result
For 6.8mm, and its pliability of conventional resultant Leather existing at present is only 5.3mm, therefore, according to resultant Leather made from the method for the present invention
28.3% is improved relative to the pliability of existing conventional resultant Leather；Meanwhile softness is made using inferior grade wet blue leather by above-mentioned
Resultant Leather prepared by the method for line leather is fallen, finished leather is soft, light, and leather body is plentiful flexible, and decorative pattern is full, uniform, utilizes
Rate is high, and physical mechanical property meets industry requirement.
In conclusion making the soft method fallen line and removed from office using inferior grade wet blue leather by described, can be good at covering
Grain defect, disability, obtained finished leather decorative pattern is full, uniform, and finished leather feel is soft, light, and leather body is plentiful flexible, meets city
The demand of field, wet blue leather utilization rate is very high, avoids wet blue leather and overstocks phenomenon, reduces economic loss, and method implementation process
Middle chemical materials cost reduction 30%, yield of leather increase by 20%, waste liquid COD contents are greatly reduced, and practicality is high.
The foregoing descriptions are merely the embodiment using this origination techniques content, any those skilled in the art use this wound
Make done modifications and changes, all belong to the scope of the claims of this creation opinion, and be not limited to those disclosed embodiments.
Claims (7)
1. a kind of make the soft method for falling line leather using inferior grade wet blue leather, it is characterised in that including following process：Will choosing
The inferior grade wet blue leather gone out carries out water squeezing shaving, rinsing → washing → neutralization → washing → stuffing → of weighing → ease back is washed → gone out
Drum standing → water squeezing stretching, extension → extension dry it is dry 1. → softening → dyeing → washing → chromatography → washing → surface treatment → washing →
Go out bulging standing → water squeezing stretching, extension → extension and dry dry 2. → flesh noodles water spray, standing → covering with paint that vibration is drawn soft → falling soft →.
2. according to claim 1 make the soft method for falling line leather using inferior grade wet blue leather, it is characterised in that to claim
The auxiliary dosage of the percentages process of the weight of inferior grade wet blue leather after the water squeezing shaving restored, the fuller that eases back
Sequence is：1.8-2.2% aromatic series synthesizing amides, 200-250% water are added, bath temperature is controlled at 38-42 DEG C, rotates 30-
35min。
3. according to claim 1 make the soft method for falling line leather using inferior grade wet blue leather, it is characterised in that to claim
The auxiliary dosage of the percentages process of the weight of inferior grade wet blue leather after the water squeezing shaving restored, the neutralization step
For：The compound of 2.5-3.5% acylates and syntans is added, 5-7% synthesis phosphorylated polymers, 200-250% water, turns
Dynamic 120-150min；Add 2.5-3% phenol sulfonic acid condensation products, rotate 30-40min, bath temperature control is at 33-37 DEG C, pH value control
System is in 5.0-5.5.
4. according to claim 1 make the soft method for falling line leather using inferior grade wet blue leather, it is characterised in that to claim
The auxiliary dosage of the percentages process of the weight of inferior grade wet blue leather after the water squeezing shaving restored, the stuffing process
For：Add the compound of 2-4% polycarboxylate compounds, 4-6% artificial oils and emulsifying agent, 200-250% water, bath temperature control
At 33-37 DEG C, it is 4.0-4.4 to add formic acid tune pH value, rotates 30-40min；The compound of 6-8% artificial oils and emulsifying agent is added,
It is 3.5-3.7 to add formic acid tune pH value, rotates 30-40min.
5. according to claim 1 make the soft method for falling line leather using inferior grade wet blue leather, it is characterised in that：It is described
Extension dries dry 1. crust leather moisture control in 12-16%.
6. according to claim 1 make the soft method for falling line leather using inferior grade wet blue leather, it is characterised in that to claim
The auxiliary dosage of the percentages process of the weight of inferior grade wet blue leather after the water squeezing shaving restored, the softening process
For：1-2% lecithin emulsions, 500-600% water are added, bath temperature is controlled at 48-52 DEG C, rotates 5-6h.
7. according to claim 1 make the soft method for falling line leather using inferior grade wet blue leather, it is characterised in that：It is described
Extension dries dry 2. crust leather moisture control in 8-12%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711058793.2A CN107988451B (en) | 2017-11-01 | 2017-11-01 | Method for manufacturing soft grain-falling leather by using low-grade wet blue leather |
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| CN201711058793.2A CN107988451B (en) | 2017-11-01 | 2017-11-01 | Method for manufacturing soft grain-falling leather by using low-grade wet blue leather |
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| CN107988451B CN107988451B (en) | 2020-02-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110527755A (en) * | 2019-09-09 | 2019-12-03 | 兴业皮革科技股份有限公司 | A kind of leather method for sorting solving the big line depth of leather patterns |
| CN111763783A (en) * | 2020-08-11 | 2020-10-13 | 湖南银河制革有限公司 | Method for preparing oil wax skin by using low-grade skin source |
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| CN104774980A (en) * | 2015-03-23 | 2015-07-15 | 浙江金鑫皮革有限公司 | Goat instep leather manufacturing technology |
| CN104988248A (en) * | 2015-07-30 | 2015-10-21 | 兴业皮革科技股份有限公司 | Making technology of natural dry milled leather |
| CN105624343A (en) * | 2016-03-29 | 2016-06-01 | 兴业皮革科技股份有限公司 | Production technique for improving tearing strength of nappa shoe upper leather |
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2017
- 2017-11-01 CN CN201711058793.2A patent/CN107988451B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104774980A (en) * | 2015-03-23 | 2015-07-15 | 浙江金鑫皮革有限公司 | Goat instep leather manufacturing technology |
| CN104988248A (en) * | 2015-07-30 | 2015-10-21 | 兴业皮革科技股份有限公司 | Making technology of natural dry milled leather |
| CN105624343A (en) * | 2016-03-29 | 2016-06-01 | 兴业皮革科技股份有限公司 | Production technique for improving tearing strength of nappa shoe upper leather |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110527755A (en) * | 2019-09-09 | 2019-12-03 | 兴业皮革科技股份有限公司 | A kind of leather method for sorting solving the big line depth of leather patterns |
| CN110527755B (en) * | 2019-09-09 | 2022-03-04 | 兴业皮革科技股份有限公司 | Leather finishing method for solving large and deep leather lines |
| CN111763783A (en) * | 2020-08-11 | 2020-10-13 | 湖南银河制革有限公司 | Method for preparing oil wax skin by using low-grade skin source |
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| CN107988451B (en) | 2020-02-21 |
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