CN106521999A - Dyeing technology of leather with filling - Google Patents
Dyeing technology of leather with filling Download PDFInfo
- Publication number
- CN106521999A CN106521999A CN201611031567.0A CN201611031567A CN106521999A CN 106521999 A CN106521999 A CN 106521999A CN 201611031567 A CN201611031567 A CN 201611031567A CN 106521999 A CN106521999 A CN 106521999A
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- Prior art keywords
- leather
- rotary drum
- formic acid
- dyeing
- dyestuff
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- D06P3/3206—Material containing basic nitrogen containing amide groups leather skins using acid dyes
-
- 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
- C14C3/10—Vegetable tanning
- C14C3/12—Vegetable tanning using purified or modified vegetable tanning 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
-
- 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
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/39—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using acid dyes
-
- 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
- D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
- D06P5/02—After-treatment
- D06P5/04—After-treatment with organic compounds
-
- 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
- D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
- D06P5/02—After-treatment
- D06P5/10—After-treatment with compounds containing metal
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention discloses a dyeing technology of a leather with filling. The dyeing technology comprises the step of materials sorting and weighing; the step of rewetting; the step of repeated mixing; the step of dye penetrability; the step of liquid expanding; the step of primary fixation; the step of surface dyeing; the step of secondary fixation; the step of automatic stacker. According to the dyeing technology of the leather with filling, dyestuff with strong permeability is chosen in the step of dye penetrability, and thus permeability of the stuff is benefited; in the step of the primary fixation, formic acid and rhodanine are added so that the formic acid and rhodanine can play roles of fixation and surface covering, thus permeation of the dyestuff added in the step of surface dyeing is impeded, and color in an interlayer is prevented from getting contaminated; in the step of surface dyeing, dyestuff with poor permeability is chosen to be subject to secondary dyeing on a surface layer and an inner layer, in addition, dosage of the dyestuff is strictly controlled, and the secondary fixation is conducted by using formic acid and rhodanine. The leather with filling obtained through the dyeing technology of leather with filling has a good color developing effect, and the dyed leather with filling is uniform in color staining, color and luster is full and the color is not prone to color fading.
Description
Technical field
The present invention relates to leather-making technology technical field, and in particular to be a kind of dyeing of sandwich leather.
Background technology
Leather coloring is an important procedure in tanning production, and general tanned leather is required for dyeing, makes leather
Various chromatic colours are presented, improve outward appearance, improve performance, to meet the requirement of people and adapt to the need of various uses
Will.Same tone can only be dyed mostly after existing leather coloring, by splicing realizing more than the leather of different colours, technique is numerous
It is trivial, and colorant match effect is stiff inflexible, it is impossible to meet requirement of the client to leather goods Color.
The leather that sandwich leather is a kind of color in its intermediate layer to be differed with surface layer, primary colour, leather are integrally taken a fancy to
Go the structure of similar sandwich biscuits, the manufacture craft of the sandwich leather is very strict to the requirement dyeed, and folder otherwise easily occurs
The situation that color penetration is irregular, infiltration is inadequate or excessive of central layer, has a strong impact on the Color and quality of sandwich leather.
The content of the invention
It is an object of the invention to provide a kind of dyeing of sandwich leather, can effective control dyestuff infiltration, it is sandwich
The color developing effect of leather is good, and the sandwich leather colouring after dyeing is uniform, full color, and not fugitive color.
In order to reach above-mentioned purpose, the solution of the present invention is：
A kind of dyeing of sandwich leather, comprises the following steps：
(1) sorting：Leather is chosen, is weighed, leather is placed in rotary drum；
(2) rewetting：Add 50～60 DEG C of hot water of 200～300% leather weights to rotary drum, the rotating speed for controlling rotary drum is 7
～10rad/min, rotates 60～120min, discharge opeing；
(3) mix again：Add 30～50 DEG C of hot water of 120～200% leather weights to rotary drum, be subsequently adding 3～6% skins
The sodium acid carbonate of leather weight, rotates 30～50min, 9～11rad/min of rotating speed, adds the filled-type of 2～4% leather weights
The modified tannin extract of retanning agent and 2～3% leather weights, rotary drum adjustment of rotational speed are 12～15rad/min, carry out reaction 30～
50min；
(4) contaminate thoroughly：The dyestuff in the corresponding leather intermediate layer of 1～2% leather weight, rotary drum adjustment of rotational speed are added in rotary drum
For 10～12rad/min, dyeing 60～80min of process；
(5) expand liquid：65～75 DEG C of 200～250% leather weights of hot water is added in rotary drum；
(6) fixation：Formic acid solution is added in rotary drum, the formic acid consumption in formic acid solution is 2～5% leather weights
Amount, the adjustment of rotational speed of rotary drum is 8～10rad/min, adds the aluminium tannin of 1～2% leather weight, reacts 20～40min；
(7) table dye：To in rotary drum, add the dyestuff of the corresponding leather surface layer and bottom of 0.5～2% leather weight, rotary drum to turn
Speed is adjusted to 10～12rad/min, and dyeing processes 40～60min；
(8) secondary fixation：Formic acid solution is added in rotary drum, the formic acid consumption in formic acid solution is 2～5% leather weights
Amount, is 8～10rad/min by the adjustment of rotational speed of rotary drum, and formic acid solution is divided into two parts and is added in rotary drum, adds first part of first
Acid solution and the time interval for adding the second formic acid solution are 20～25min, add the aluminium tannin of 1～2% leather weight, instead
Answer 20～40min；
(9) go out drum, take horse, stand 12～24h.
In step (3), the filled-type retanning agent is RVL resin retaning agents, and the modified tannin extract is wattle extract.
In step (4), the dyestuff is acid dyes.
In step (7), the dyestuff is acid dyes.
After above-mentioned technical proposal, a kind of dyeing of sandwich leather of the present invention selects permeability in dye step thoroughly
Strong dyestuff is dyeed, and is conducive to the infiltration of dyestuff, and the formic acid and aluminium tannin added in a fixation step plays fixation
Act on front cover, the infiltration of the dyestuff that table added when contaminating can be hindered, protect the color in intermediate layer not to be contaminated, in table dye step
The rapid dyestuff from poor permeability carries out the secondary dyeing of surface layer and bottom, and the consumption of strict control dyestuff, the dyestuff of addition
Excessively, many, the color in impact intermediate layer may be penetrated, the dyestuff of addition very little, may cause dye levels not enough, affect whole
The Color of body, finally carries out secondary fixation using formic acid and aluminium tannin.Therefore, using a kind of dye of sandwich leather of the present invention
The sandwich leather that color technique is obtained, color developing effect are good, and the sandwich leather colouring after dyeing is uniform, full color, and not fugitive color.
Specific embodiment
In order to technical scheme is explained further, the present invention is explained in detail below by specific embodiment
State.
A kind of dyeing of sandwich leather, comprises the following steps：
(1) sorting：Leather is chosen, is weighed, leather is placed in rotary drum；
(2) rewetting：Add 50～60 DEG C of hot water of 200～300% leather weights to rotary drum, the rotating speed for controlling rotary drum is 7
～10rad/min, rotates 60～120min, discharge opeing；
(3) mix again：Add 30～50 DEG C of hot water of 120～200% leather weights to rotary drum, be subsequently adding 3～6% skins
The sodium acid carbonate of leather weight, rotates 30～50min, 9～11rad/min of rotating speed, adds the filled-type of 2～4% leather weights
The modified tannin extract of retanning agent and 2～3% leather weights, rotary drum adjustment of rotational speed are 12～15rad/min, carry out reaction 30～
50min；
(4) contaminate thoroughly：The dyestuff in the corresponding leather intermediate layer of 1～2% leather weight, rotary drum adjustment of rotational speed are added in rotary drum
For 10～12rad/min, dyeing 60～80min of process；
(5) expand liquid：65～75 DEG C of 200～250% leather weights of hot water is added in rotary drum；
(6) fixation：Formic acid solution is added in rotary drum, the formic acid consumption in formic acid solution is 2～5% leather weights
Amount, the adjustment of rotational speed of rotary drum is 8～10rad/min, adds the aluminium tannin of 1～2% leather weight, reacts 20～40min；
(7) table dye：To in rotary drum, add the dyestuff of the corresponding leather surface layer and bottom of 0.5～2% leather weight, rotary drum to turn
Speed is adjusted to 10～12rad/min, and dyeing processes 40～60min；
(8) secondary fixation：Formic acid solution is added in rotary drum, the formic acid consumption in formic acid solution is 2～5% leather weights
Amount, is 8～10rad/min by the adjustment of rotational speed of rotary drum, and formic acid solution is divided into two parts and is added in rotary drum, adds first part of first
Acid solution and the time interval for adding the second formic acid solution are 20～25min, add the aluminium tannin of 1～2% leather weight, instead
Answer 20～40min；
(9) go out drum, take horse, stand 12～24h.
In step (3), the filled-type retanning agent is multiple by the RVL resins that Shandong Li Ning tech materials Co., Ltd provides
Tanning agent, the wattle extract that the modified tannin extract is provided by Quanzhou Kang Li commerce and trade Co., Ltd.
In step (4), the dyestuff is acid dyes, and by Shanghai Yi Man weavings, Chemical Co., Ltd. is provided.
In step (7), the dyestuff is acid dyes, and by Shanghai Yi Man weavings, Chemical Co., Ltd. is provided.
Embodiment one
A kind of dyeing of sandwich leather, comprises the following steps：
(1) sorting：Leather is chosen, is weighed, leather is placed in rotary drum, the weight of leather is used as other originals in subsequent handling
The reference of material addition；
(2) rewetting：Add 50 DEG C of hot water of 200% leather weight to rotary drum, the rotating speed for controlling rotary drum is 7rad/min, is turned
Dynamic 80min, discharge opeing；
(3) mix again：Add 50 DEG C of hot water of 200% leather weight to rotary drum, be subsequently adding the carbonic acid of 3% leather weight
Hydrogen sodium, rotates 40min, rotating speed 9rad/min, adds the chaste tree of the RVL resin retaning agents and 2% leather weight of 2% leather weight
Bark tannin extract, rotary drum adjustment of rotational speed are 12rad/min, carry out reaction 30min；
(4) contaminate thoroughly：To in rotary drum, add the red RSN of dyestuff in the corresponding leather intermediate layer of 2% leather weight, rotary drum rotating speed to adjust
It is whole for 10rad/min, dyeing processes 60min；
(5) expand liquid：65 DEG C of 200% leather weight of hot water is added in rotary drum；
(6) fixation：Formic acid solution is added in rotary drum, the formic acid consumption in formic acid solution is 2% leather weight, is turned
Bulging adjustment of rotational speed is 8rad/min, adds the aluminium tannin of 1% leather weight, reacts 20min；
(7) table dye：To in rotary drum, add the dyestuff of correspondence leather surface layer and bottom, dyestuff to include the Huang of 1% leather weight
The yellow MR of brown EDL and 2% leather weight, rotary drum adjustment of rotational speed are 10rad/min, dyeing process 40min；
(8) secondary fixation：Formic acid solution is added in rotary drum, the formic acid consumption in formic acid solution is 2% leather weight, will
The adjustment of rotational speed of rotary drum is 8rad/min, and formic acid solution is divided into two parts and is added in rotary drum, add first part of formic acid solution and
The time interval for adding the second formic acid solution is 20min, adds the aluminium tannin of 1% leather weight, reacts 20min；
(9) go out drum, take horse, stand 16h, obtain final product the sandwich leather.
The surface layer and bottom of the sandwich leather produced is yellow, and intermediate layer is kermesinus, and color developing effect is good, after dyeing
Sandwich leather colouring is uniform, full color, and not fugitive color.
Embodiment two
A kind of dyeing of sandwich leather, comprises the following steps：
(1) sorting：Leather is chosen, is weighed, leather is placed in rotary drum；
(2) rewetting：Add 60 DEG C of hot water of 250% leather weight to rotary drum, the rotating speed for controlling rotary drum is 9rad/min, is turned
Dynamic 100min, discharge opeing；
(3) mix again：Add 40 DEG C of hot water of 150% leather weight to rotary drum, be subsequently adding the carbonic acid of 5% leather weight
Hydrogen sodium, rotates 30min, rotating speed 10rad/min, adds the RVL resin retaning agents and 3% leather weight of 3% leather weight
Wattle extract, rotary drum adjustment of rotational speed are 14rad/min, carry out reaction 40min；
(4) contaminate thoroughly：To in rotary drum, add the dyestuff Huang MR in the corresponding leather intermediate layer of 2% leather weight, rotary drum rotating speed to adjust
It is whole for 11rad/min, dyeing processes 70min；
(5) expand liquid：70 DEG C of 220% leather weight of hot water is added in rotary drum；
(6) fixation：Formic acid solution is added in rotary drum, the formic acid consumption in formic acid solution is 3.5% leather weight,
The adjustment of rotational speed of rotary drum is 9rad/min, adds the aluminium tannin of 1.5% leather weight, reacts 30min；
(7) table dye：To in rotary drum, add the dyestuff of correspondence leather surface layer and bottom, dyestuff to include the palm fibre of 1% leather weight
The red MV of ESR and 2% leather weight, rotary drum adjustment of rotational speed are 11rad/min, dyeing process 50min；
(8) secondary fixation：Formic acid solution is added in rotary drum, the formic acid consumption in formic acid solution is 3.5% leather weight,
It is 9rad/min by the adjustment of rotational speed of rotary drum, formic acid solution is divided into two parts and is added in rotary drum, adds first part of formic acid solution
Time interval with the second formic acid solution of addition is 20min, adds the aluminium tannin of 1.5% leather weight, reacts 30min；
(9) go out drum, take horse, stand 20h, obtain final product the sandwich leather.
The surface layer and bottom of the sandwich leather produced is rufous, and intermediate layer is yellow, and color developing effect is good, after dyeing
Sandwich leather colouring is uniform, full color, and not fugitive color.
Embodiment three
A kind of dyeing of sandwich leather, comprises the following steps：
(1) sorting：Leather is chosen, is weighed, leather is placed in rotary drum；
(2) rewetting：Add 55 DEG C of hot water of 300% leather weight to rotary drum, the rotating speed for controlling rotary drum is 10rad/min,
Rotate 120min, discharge opeing；
(3) mix again：Add 30 DEG C of hot water of 120% leather weight to rotary drum, be subsequently adding the carbonic acid of 6% leather weight
Hydrogen sodium, rotates 50min, rotating speed 11rad/min, adds the RVL resin retaning agents and 3% leather weight of 4% leather weight
Wattle extract, rotary drum adjustment of rotational speed are 15rad/min, carry out reaction 50min；
(4) contaminate thoroughly：To in rotary drum, add the dyestuff Huang MR in the corresponding leather intermediate layer of 2% leather weight, rotary drum rotating speed to adjust
It is whole for 12rad/min, dyeing processes 80min；
(5) expand liquid：75 DEG C of 250% leather weight of hot water is added in rotary drum；
(6) fixation：Formic acid solution is added in rotary drum, the formic acid consumption in formic acid solution is 5% leather weight, is turned
Bulging adjustment of rotational speed is 10rad/min, adds the aluminium tannin of 2% leather weight, reacts 40min；
(7) table dye：To in rotary drum, add the dyestuff of correspondence leather surface layer and bottom, dyestuff to include 0.5% leather weight
The blue 6B of red MV and 1.2% leather weight, rotary drum adjustment of rotational speed are 12rad/min, dyeing process 60min；
(8) secondary fixation：Formic acid solution is added in rotary drum, the formic acid consumption in formic acid solution is 5% leather weight, will
The adjustment of rotational speed of rotary drum is 10rad/min, and formic acid solution is divided into two parts and is added in rotary drum, add first part of formic acid solution and
The time interval for adding the second formic acid solution is 25min, adds the aluminium tannin of 2% leather weight, reacts 40min；
(9) go out drum, take horse, stand 24h, obtain final product the sandwich leather.
The surface layer and bottom of the sandwich leather produced is pansy, and intermediate layer is yellow, and color developing effect is good, after dyeing
The colouring of sandwich leather is uniform, full color, and not fugitive color.
The product form and style of above-described embodiment the non-limiting present invention, the ordinary skill people of any art
Appropriate change or modification that member is done to which, all should be regarded as the patent category without departing from the present invention.
Claims (4)
1. a kind of dyeing of sandwich leather, it is characterised in that：Comprise the following steps：
(1) sorting：Leather is chosen, is weighed, leather is placed in rotary drum；
(2) rewetting：50～60 DEG C of hot water of 200～300% leather weights are added to arrive rotary drum, control the rotating speed of rotary drum for 7～
10rad/min, rotates 60～120min, discharge opeing；
(3) mix again：Add 30～50 DEG C of hot water of 120～200% leather weights to rotary drum, be subsequently adding 3～6% leather weights
The sodium acid carbonate of amount, rotates 30～50min, 9～11rad/min of rotating speed, adds the filled-type retanning of 2～4% leather weights
Agent and the modified tannin extract of 2～3% leather weights, rotary drum adjustment of rotational speed are 12～15rad/min, carry out 30～50min of reaction；
(4) contaminate thoroughly：The dyestuff in the corresponding leather intermediate layer of 1～2% leather weight is added in rotary drum, rotary drum adjustment of rotational speed is 10
～12rad/min, dyeing process 60～80min；
(5) expand liquid：65～75 DEG C of 200～250% leather weights of hot water is added in rotary drum；
(6) fixation：Formic acid solution is added in rotary drum, the formic acid consumption in formic acid solution is 2～5% leather weights, is turned
Bulging adjustment of rotational speed is 8～10rad/min, adds the aluminium tannin of 1～2% leather weight, reacts 20～40min；
(7) table dye：To in rotary drum, add the dyestuff of the corresponding leather surface layer and bottom of 0.5～2% leather weight, rotary drum rotating speed to adjust
Whole is 10～12rad/min, and dyeing processes 40～60min；
(8) secondary fixation：Formic acid solution is added in rotary drum, the formic acid consumption in formic acid solution is 2～5% leather weights, will
The adjustment of rotational speed of rotary drum is 8～10rad/min, and formic acid solution is divided into two parts and is added in rotary drum, adds first part of formic acid molten
Liquid and the time interval for adding the second formic acid solution are 20～25min, add the aluminium tannin of 1～2% leather weight, reaction 20
～40min；
(9) go out drum, take horse, stand 12～24h.
2. the dyeing of a kind of sandwich leather according to claim 1, it is characterised in that：In step (3), the filling
Type retanning agent is RVL resin retaning agents, and the modified tannin extract is wattle extract.
3. the dyeing of a kind of sandwich leather according to claim 1, it is characterised in that：In step (4), the dyestuff
For acid dyes.
4. the dyeing of a kind of sandwich leather according to claim 1, it is characterised in that：In step (7), the dyestuff
For acid dyes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611031567.0A CN106521999A (en) | 2016-11-22 | 2016-11-22 | Dyeing technology of leather with filling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611031567.0A CN106521999A (en) | 2016-11-22 | 2016-11-22 | Dyeing technology of leather with filling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106521999A true CN106521999A (en) | 2017-03-22 |
Family
ID=58356167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611031567.0A Pending CN106521999A (en) | 2016-11-22 | 2016-11-22 | Dyeing technology of leather with filling |
Country Status (1)
| Country | Link |
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| CN (1) | CN106521999A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103243587A (en) * | 2013-05-28 | 2013-08-14 | 宁夏成丰工贸有限公司 | Technique for dyeing Tan sheep skin |
| CN104878599A (en) * | 2015-05-15 | 2015-09-02 | 陕西科技大学 | Method of processing superfine fiber synthetic leather skin-imitated leather |
| CN105950793A (en) * | 2016-06-01 | 2016-09-21 | 际华三五二皮革服装有限公司 | Production method of semi-vegetable tanning goat clothing leather |
-
2016
- 2016-11-22 CN CN201611031567.0A patent/CN106521999A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103243587A (en) * | 2013-05-28 | 2013-08-14 | 宁夏成丰工贸有限公司 | Technique for dyeing Tan sheep skin |
| CN104878599A (en) * | 2015-05-15 | 2015-09-02 | 陕西科技大学 | Method of processing superfine fiber synthetic leather skin-imitated leather |
| CN105950793A (en) * | 2016-06-01 | 2016-09-21 | 际华三五二皮革服装有限公司 | Production method of semi-vegetable tanning goat clothing leather |
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Application publication date: 20170322 |
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