CN112063777A - Soft anti-tearing anti-napping leather and manufacturing method thereof - Google Patents
Soft anti-tearing anti-napping leather and manufacturing method thereof Download PDFInfo
- Publication number
- CN112063777A CN112063777A CN202010957077.3A CN202010957077A CN112063777A CN 112063777 A CN112063777 A CN 112063777A CN 202010957077 A CN202010957077 A CN 202010957077A CN 112063777 A CN112063777 A CN 112063777A
- Authority
- CN
- China
- Prior art keywords
- running
- leather
- water
- wet blue
- soft
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C1/00—Chemical treatment prior to tanning
- C14C1/04—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
- C14C11/00—Surface finishing of leather
- C14C11/003—Surface finishing of leather using macromolecular 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention discloses a soft anti-tearing suede leather and a manufacturing method thereof, and belongs to the technical field of leather manufacturing. The soft anti-tearing suede leather is prepared by the following steps: and (2) the wet blue leather is subjected to rewetting → retanning → alkali extraction → neutralization → dyeing → fat adding → fixation, and then is subjected to washing water to be discharged from a drum → a pasting board → airing → softening → coarse sand grinding → drum throwing → fine sand grinding → finishing, so that the soft anti-tearing anti-reverse suede leather is obtained, and the obtained reverse suede leather has good soft hand feeling and excellent anti-tearing performance.
Description
Technical Field
The invention belongs to the technical field of leather manufacturing, and particularly relates to a soft anti-tearing suede leather and a manufacturing method thereof.
Background
The suede leather is more and more popular due to the superior texture and elegant appearance, and is widely applied to materials such as business leatherware, shoes and clothes. The existing suede leather has the defect of color loss, and may have a fluff loss phenomenon in the use process, and has higher maintenance requirement; therefore, there is a need for an improved process for making suede that provides a soft, comfortable feel, while having good color fastness and abrasion resistance.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a soft anti-tearing suede leather and a manufacturing method thereof.
The invention adopts the following technical scheme:
the manufacturing method of the soft anti-tearing suede leather comprises the following steps:
the wet blue leather is sequentially subjected to rewetting → retanning → alkali extraction → neutralization → dyeing → fatliquoring → fixation, and then is subjected to washing water and bulging → pasting → air drying → softening → coarse sand grinding → drum throwing → fine sand grinding → finishing, so that the soft anti-tearing anti-reverse suede leather is obtained;
wherein, the rewetting specifically comprises: putting wet blue leather into a rotary drum, sequentially adding 150-210% of water, 0.4-0.6% of a moisture returning agent, 0.5-0.7% of a degreasing agent DM-100 and 0.4-0.6% of multifunctional emulsifiable grease BZU according to the weight percentage of the wet blue leather, running for 55-65min, adding 1-2% of acid softening enzyme TJ-A489 and 1.5-2.5% of ammonium bisulfate, running for 115-125min, adding 0.45-0.55% of formic acid and 0.75-0.85% of oxalic acid, running for 55-65min, washing for twice and discharging liquid;
the alkali extraction is specifically as follows: according to the weight percentage of the wet blue skin, sequentially adding 40-50% of water and 0.5-1.5% of sodium formate, running for 25-35min, continuously adding 0.2-0.8% of baking soda, running for 25-35min, then adding 0.2-0.8% of baking soda, running for 25-35min, adjusting the pH value to 3-5, and discharging liquid after washing water;
the fixing specifically comprises: adding 0.4-0.6% of formic acid according to the weight percentage of the wet blue skin, operating for 15-25min, continuously adding 0.5-0.7% of formic acid, operating for 15-25min, then adding 0.6-0.8% of formic acid, and operating for 15-25 min;
furthermore, the temperature of the water added in the rewetting step is 35-45 ℃.
Further, the retanning is specifically as follows: according to the weight percentage of the wet blue leather, adding 70-90% of water and 0.45-0.55% of formic acid into a rotary drum in sequence, running for 25-35min, adding 1-2% of cationic fatting agent, running for 15-25min, continuing adding 1-2% of aldehyde tanning agent, running for 55-65min, adding 4.5-5.5% of chromium powder, running for 115-125min, and draining after washing water.
Further, the neutralization is specifically: according to the weight percentage of the wet blue leather, 110-130% of water, 1.5-2.5% of sodium formate, 1.5-2.5% of neutralizing agent and 0.8-1.2% of baking soda are sequentially added, the operation is carried out for 35-45min, then 0.4-0.6% of sodium sulfite and 0.4-0.6% of ammonium bicarbonate are added, the operation is carried out for 115-125min, and the liquid is discharged after the water washing is carried out for two times.
Further, the dyeing is specifically: adding 1-2% of ammonia water according to the weight percentage of the wet blue leather, operating for 5-15min, sequentially adding 1.5-2.5% of tamm, 1.5-2.5% of basdan UR, adding a dye, operating for 55-65min, and discharging after washing.
Further, the fatliquoring is specifically as follows: adding 6.5-7.5% of SYNTHOL LC, 4.5-5.5% of SYNTHOL LW and 1.5-2.5% of SYNTHOL TL according to the weight percentage of the wet blue leather, operating for 65-75min, and adding 115-125% of water.
Further, in the retanning step, the cationic fatliquor is TJ-F721, and the aldehyde tanning agent is litannin GM; in the neutralization step, the neutralizing agent is Tam XNL.
The invention also provides the soft anti-tearing reverse suede prepared by the preparation method of the soft anti-tearing reverse suede.
Compared with the prior art, the invention has the beneficial effects that:
the soft anti-tearing anti-pulling reverse suede is obtained by rewetting → retanning → alkali extraction → neutralization → dyeing → fat adding → fixing, washing with water to make the leather go out of the drum → pasting the board → drying in the air → softening → coarse sand grinding → drum throwing → fine sand grinding → finishing, and the prepared reverse suede has good color fastness and wear resistance, soft hand feeling and strong comfort;
in the manufacturing method, the Youshan W, the degreasing agent DM-100, the multifunctional emulsifying grease BZU and the acid softening enzyme TJ-A489 are compounded and used in the rewetting stage, so that the soaking time can be effectively shortened, the water permeation is accelerated, the tension between leather fibers is reduced, the leather can be effectively moistened, the leather pile has no greasy feeling, and the leather is effectively moistened, so that the leather pile has no greasy feeling;
in the retanning stage, after the cationic fatliquor TJ-F721 and the aldehyde tanning agent litannin GM are compounded for use, the leather is endowed with soft and full hand feeling and good leather grinding performance, the pile is fine, the suede has certain gloss, and a good foundation is laid for the operability of the subsequent working procedures;
in the dyeing stage, the tamm and the Basdan UR are added, so that the chemical materials are more milder and more uniformly permeated into the leather, the elasticity of the grain surface of the leather is kept, the dyeing is more uniform, the finished leather is plump and soft, the grain surface is fine, the dyeing is uniform, the color tone is clear, and the color fastness of the leather is ensured;
in the greasing stage, SYNTHOL LC, SYNTHOL LW and SYNTHOL TL are compounded for use, so that the uniform penetration of the greasing agent is effectively promoted, and the leather is further endowed with good softness and smooth hand feeling;
the preparation method of the invention has mild conditions, is convenient to operate and is suitable for popularization and application.
Detailed Description
The present invention will be described in further detail with reference to examples.
It will be appreciated by those skilled in the art that the following examples are illustrative of the invention only and should not be taken as limiting the scope of the invention.
The main materials used in the invention are as follows:
basdan UR, light-resistant retanning agent;
SYNTHOL LC；
youshan W;
SYNTHOL LV；
SYNTHOL LW, mixed fats;
SYNTHOL TL；
degreasing agent DM-100;
tamm M, syntan;
litharge GM, aldehyde tanning agent;
tam X NL, liquid, synthetic tanning aid;
cationic fatliquor TJ-F721;
EDOLAN BZU, multifunctional emulsifying oils;
acid softening enzyme TJ-A489;
the raw materials of the reagents used in the present invention can be purchased, unless otherwise specified.
Example 1
The manufacturing method of the soft anti-tearing suede leather comprises the following steps:
the wet blue leather is sequentially subjected to rewetting → retanning → alkali extraction → neutralization → dyeing → fatliquoring → fixation, and then is subjected to washing water and bulging → pasting → air drying → softening → coarse sand grinding → drum throwing → fine sand grinding → finishing, so that the soft anti-tearing anti-reverse suede leather is obtained;
wherein, the rewetting specifically comprises: putting wet blue leather into a rotary drum, sequentially adding 180% of water (the temperature of the water is 40 ℃), 0.5% of a moisture-regaining agent (Youshan W), 0.6% of a degreasing agent DM-100 and 0.5% of multifunctional emulsifiable grease BZU according to the weight percentage of the wet blue leather, running for 60min, adding 1.5% of acid softening enzyme TJ-A489 and 2.0% of ammonium bisulfate, running for 120min, adding 0.5% of formic acid and 0.8% of oxalic acid, running for 60min, washing water twice and discharging liquid;
the retanning specifically comprises the following steps: according to the weight percentage of the wet blue leather, adding 80% of water and 0.5% of formic acid into a rotary drum in sequence, running for 30min, adding 1.5% of cationic fatting agent TJ-F721, running for 20min, continuing adding 1.5% of aldehyde tanning agent litannin GM, running for 60min, adding 5% of chromium powder, running for 120min, and discharging liquid after washing water;
the alkali extraction is specifically as follows: according to the weight percentage of the wet blue skin, sequentially adding 45% of water and 1% of sodium formate, running for 30min, continuously adding 0.5% of baking soda, running for 30min, then adding 0.5% of baking soda, running for 30min, adjusting the pH value to 3-5, and discharging liquid after washing;
the neutralization is specifically as follows: according to the weight percentage of the wet blue skin, 120% of water, 2.0% of sodium formate, 2.0% of neutralizer Tamu X NL and 1.0% of baking soda are sequentially added, the operation is carried out for 40min, 0.5% of sodium sulfite and 0.5% of ammonium bicarbonate are added, the operation is carried out for 120min, and the liquor is discharged after the water washing is carried out for two times;
the dyeing is specifically as follows: adding 1.5% of ammonia water according to the weight percentage of the wet blue leather, running for 10min, sequentially adding 2.0% of tamm M and 2.0% of pasteur UR, adding a dye, running for 60min, and draining after washing;
the fat liquoring method specifically comprises the following steps: adding 7% of SYNTHOLLC, 5% of SYNTHOL LW and 2% of SYNTHOL TL according to the weight percentage of the wet blue, running for 70min, and adding 120% of water;
the fixing specifically comprises: adding 0.5% of formic acid according to the weight percentage of the wet blue skin, running for 20min, continuously adding 0.6% of formic acid, running for 20min, then adding 0.7% of formic acid, and running for 20 min.
Example 2
The manufacturing method of the soft anti-tearing suede leather comprises the following steps:
the wet blue leather is sequentially subjected to rewetting → retanning → alkali extraction → neutralization → dyeing → fatliquoring → fixation, and then is subjected to washing water and bulging → pasting → air drying → softening → coarse sand grinding → drum throwing → fine sand grinding → finishing, so that the soft anti-tearing anti-reverse suede leather is obtained;
wherein, the rewetting specifically comprises: putting wet blue leather into a rotary drum, sequentially adding 150% of water (the temperature of the water is 35 ℃), 0.4% of a moisture regaining agent (Youshan W), 0.5% of a degreasing agent DM-100 and 0.4% of multifunctional emulsifiable grease BZU according to the weight percentage of the wet blue leather, running for 55min, adding 1% of acid softening enzyme TJ-A489 and 1.5% of ammonium bisulfate, running for 115min, adding 0.45% of formic acid and 0.75% of oxalic acid, running for 55min, washing water for two times, and discharging liquid;
the retanning specifically comprises the following steps: according to the weight percentage of the wet blue leather, adding 70% of water and 0.45% of formic acid into a rotary drum in sequence, running for 25min, adding 1% of cationic fatting agent TJ-F721, running for 15min, continuing adding 1% of aldehyde tanning agent litannin GM, running for 55min, adding 4.5% of chromium powder, running for 115min, and draining after washing;
the alkali extraction is specifically as follows: according to the weight percentage of the wet blue skin, sequentially adding 40% of water and 0.5% of sodium formate, running for 25min, continuously adding 0.2% of baking soda, running for 25min, adjusting the pH value to 3-5, and discharging liquid after washing;
the neutralization is specifically as follows: according to the weight percentage of the wet blue leather, sequentially adding 110% of water, 1.5% of sodium formate, 1.5% of neutralizer Tamu X NL and 0.8% of baking soda, running for 35min, then adding 0.4% of sodium sulfite and 0.4% of ammonium bicarbonate, running for 115min, and discharging after washing for two times;
the dyeing is specifically as follows: adding 1% of ammonia water according to the weight percentage of the wet blue skin, running for 5min, sequentially adding 1.5% of tamm M and 1.5% of pasteur UR, adding a dye, running for 55min, washing and discharging liquid;
the fat liquoring method specifically comprises the following steps: adding 6.5% of SYNTHOL LC, 4.5% of SYNTHOL LW and 1.5% of SYNTHOL TL according to the weight percentage of the wet blue leather, running for 65min, and adding 115% of water;
the fixing specifically comprises: adding 0.4% of formic acid according to the weight percentage of the wet blue skin, running for 15min, continuously adding 0.5% of formic acid, running for 15min, adding 0.6% of formic acid, and running for 15 min.
Example 3
The manufacturing method of the soft anti-tearing suede leather comprises the following steps:
the wet blue leather is sequentially subjected to rewetting → retanning → alkali extraction → neutralization → dyeing → fatliquoring → fixation, and then is subjected to washing water and bulging → pasting → air drying → softening → coarse sand grinding → drum throwing → fine sand grinding → finishing, so that the soft anti-tearing anti-reverse suede leather is obtained;
wherein, the rewetting specifically comprises: putting wet blue leather into a rotary drum, sequentially adding 210% of water (the temperature of the water is 45 ℃), 0.6% of a moisture regaining agent (Youshan W), 0.7% of a degreasing agent DM-100 and 0.6% of multifunctional emulsifiable grease BZU according to the weight percentage of the wet blue leather, running for 65min, adding 2% of acid softening enzyme TJ-A489 and 2.5% of ammonium bisulfate, running for 125min, adding 0.55% of formic acid and 0.85% of oxalic acid, running for 55-65min, washing water twice and discharging liquid;
the retanning specifically comprises the following steps: according to the weight percentage of the wet blue leather, sequentially adding 90% of water and 0.55% of formic acid into a rotary drum, running for 35min, adding 2% of a cationic fatting agent TJ-F721, running for 25min, continuously adding 2% of an aldehyde tanning agent litannin GM, running for 65min, adding 5.5% of chromium powder, running for 125min, and discharging liquid after washing;
the alkali extraction is specifically as follows: according to the weight percentage of the wet blue skin, sequentially adding 50% of water and 1.5% of sodium formate, running for 35min, continuously adding 0.8% of baking soda, running for 35min, then adding 0.8% of baking soda, running for 35min, adjusting the pH value to 3-5, and discharging liquid after washing;
the neutralization is specifically as follows: according to the weight percentage of the wet blue leather, 130% of water, 2.5% of sodium formate, 2.5% of neutralizer Tamu X NL and 1.2% of baking soda are sequentially added, the operation is carried out for 45min, then 0.6% of sodium sulfite and 0.6% of ammonium bicarbonate are added, the operation is carried out for 125min, and the liquor is discharged after the water washing is carried out for two times;
the dyeing is specifically as follows: adding 2% of ammonia water according to the weight percentage of the wet blue leather, operating for 15min, sequentially adding 2.5% of tamm M and 2.5% of pasteur UR, adding a dye, operating for 65min, and discharging after washing;
the fat liquoring method specifically comprises the following steps: adding 7.5% of SYNTHOL LC, 5.5% of SYNTHOL LW and 2.5% of SYNTHOL TL according to the weight percentage of the wet blue leather, running for 75min, and adding 125% of water;
the fixing specifically comprises: adding 0.6% of formic acid according to the weight percentage of the wet blue skin, running for 25min, continuously adding 0.7% of formic acid, running for 25min, adding 0.8% of formic acid, and running for 25 min.
The leathers obtained from examples 1 to 3 according to the invention were tested for their properties and the results are shown in table 1 below:
table 1 table of performance test data
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The manufacturing method of the soft anti-tearing suede is characterized by comprising the following steps:
the wet blue leather is sequentially subjected to rewetting → retanning → alkali extraction → neutralization → dyeing → fatliquoring → fixation, and then is subjected to washing water and bulging → pasting → air drying → softening → coarse sand grinding → drum throwing → fine sand grinding → finishing, so that the soft anti-tearing anti-reverse suede leather is obtained;
wherein, the rewetting specifically comprises: putting wet blue leather into a rotary drum, sequentially adding 150-210% of water, 0.4-0.6% of a moisture returning agent, 0.5-0.7% of a degreasing agent DM-100 and 0.4-0.6% of multifunctional emulsifiable grease BZU according to the weight percentage of the wet blue leather, running for 55-65min, adding 1-2% of acid softening enzyme TJ-A489 and 1.5-2.5% of ammonium bisulfate, running for 115-125min, adding 0.45-0.55% of formic acid and 0.75-0.85% of oxalic acid, running for 55-65min, washing for twice and discharging liquid;
the alkali extraction is specifically as follows: according to the weight percentage of the wet blue skin, sequentially adding 40-50% of water and 0.5-1.5% of sodium formate, running for 25-35min, continuously adding 0.2-0.8% of baking soda, running for 25-35min, then adding 0.2-0.8% of baking soda, running for 25-35min, adjusting the pH value to 3-5, and discharging liquid after washing water;
the fixing specifically comprises: adding 0.4-0.6% of formic acid according to the weight percentage of the wet blue skin, operating for 15-25min, continuously adding 0.5-0.7% of formic acid, operating for 15-25min, then adding 0.6-0.8% of formic acid, and operating for 15-25 min.
2. The method for making a soft tear-resistant suede as claimed in claim 1, wherein the temperature of the water added in the step of rewetting is 35-45 ℃.
3. The method for making a soft tear-resistant suede leather according to claim 1, wherein the retanning is specifically: according to the weight percentage of the wet blue leather, adding 70-90% of water and 0.45-0.55% of formic acid into a rotary drum in sequence, running for 25-35min, adding 1-2% of cationic fatting agent, running for 15-25min, continuing adding 1-2% of aldehyde tanning agent, running for 55-65min, adding 4.5-5.5% of chromium powder, running for 115-125min, and draining after washing water.
4. The method for manufacturing the soft tear-resistant suede leather according to claim 1, wherein the neutralization is specifically as follows: according to the weight percentage of the wet blue leather, 110-130% of water, 1.5-2.5% of sodium formate, 1.5-2.5% of neutralizing agent and 0.8-1.2% of baking soda are sequentially added, the operation is carried out for 35-45min, then 0.4-0.6% of sodium sulfite and 0.4-0.6% of ammonium bicarbonate are added, the operation is carried out for 115-125min, and the liquid is discharged after the water washing is carried out for two times.
5. The method for manufacturing the soft tear-resistant suede leather according to claim 1, wherein the dyeing is specifically: adding 1-2% of ammonia water according to the weight percentage of the wet blue leather, operating for 5-15min, sequentially adding 1.5-2.5% of tamm, 1.5-2.5% of basdan UR, adding a dye, operating for 55-65min, and discharging after washing.
6. The method for manufacturing the soft tear-resistant suede leather according to claim 1, wherein the fatliquoring is specifically as follows: adding 6.5-7.5% of SYNTHOL LC, 4.5-5.5% of SYNTHOL LW and 1.5-2.5% of SYNTHOL TL according to the weight percentage of the wet blue leather, operating for 65-75min, and adding 115-125% of water.
7. A method of making a soft tear-resistant suede skin according to claim 3, wherein in the retanning step, the cationic fatliquor is TJ-F721, the aldehyde tanning agent is ritonan GM; in the neutralization step, the neutralizing agent is Tam XNL.
8. A soft tear-resistant suede made by the method of making a soft tear-resistant suede according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010957077.3A CN112063777A (en) | 2020-09-12 | 2020-09-12 | Soft anti-tearing anti-napping leather and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010957077.3A CN112063777A (en) | 2020-09-12 | 2020-09-12 | Soft anti-tearing anti-napping leather and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112063777A true CN112063777A (en) | 2020-12-11 |
Family
ID=73696394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010957077.3A Pending CN112063777A (en) | 2020-09-12 | 2020-09-12 | Soft anti-tearing anti-napping leather and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112063777A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101130825A (en) * | 2007-08-17 | 2008-02-27 | 晋江峰安皮业有限公司 | Manufacturing method for washable suede |
| CN107287365A (en) * | 2017-07-31 | 2017-10-24 | 漳州香洲皮革有限公司 | The preparation technology of strong force of explosion double-layer leather |
| CN108251579A (en) * | 2018-02-09 | 2018-07-06 | 漳州香洲皮革有限公司 | Non-explosive two layers of suede of muscle and preparation method thereof |
| CN110938717A (en) * | 2019-12-13 | 2020-03-31 | 漳州香洲皮革有限公司 | White yellowing-resistant cow double-layer leather and manufacturing method thereof |
-
2020
- 2020-09-12 CN CN202010957077.3A patent/CN112063777A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101130825A (en) * | 2007-08-17 | 2008-02-27 | 晋江峰安皮业有限公司 | Manufacturing method for washable suede |
| CN107287365A (en) * | 2017-07-31 | 2017-10-24 | 漳州香洲皮革有限公司 | The preparation technology of strong force of explosion double-layer leather |
| CN108251579A (en) * | 2018-02-09 | 2018-07-06 | 漳州香洲皮革有限公司 | Non-explosive two layers of suede of muscle and preparation method thereof |
| CN110938717A (en) * | 2019-12-13 | 2020-03-31 | 漳州香洲皮革有限公司 | White yellowing-resistant cow double-layer leather and manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103290149B (en) | Process for making goat upper leather | |
| CN108977593B (en) | Production process for improving flatness and fineness of grain surface of leather | |
| CN108165678B (en) | Production method of suede leather | |
| CN104789714B (en) | A kind of Sheep Skin Upper Leather manufacture craft | |
| CN107217110B (en) | Manufacturing process of waterproof long fur | |
| CN108130755B (en) | Dyeing agent for fur leather and dyeing process for fur leather | |
| CN103290148A (en) | Process for making goat denim line simulated upper leather | |
| CN111705171B (en) | Production method of cow leather upper leather for dance shoes | |
| CN110938717B (en) | White yellowing-resistant cow double-layer leather and manufacturing method thereof | |
| CN108950100B (en) | Production process of original thick environment-friendly shrunk-pattern cattle leather | |
| CN108251579B (en) | Non-explosive rib two-layer reverse suede and manufacturing method thereof | |
| US4443221A (en) | Tanning method | |
| CN112063777A (en) | Soft anti-tearing anti-napping leather and manufacturing method thereof | |
| CN110982963B (en) | Manufacturing method of environment-friendly bending-resistant soft leather | |
| CN112094957A (en) | Anti-bending leather | |
| CN109097510B (en) | Method for manufacturing mercerized leather by one-step dyeing | |
| CN113832263B (en) | Production method of buffalo hide instead of buffalo hide | |
| CN110938719B (en) | Tannin extract oil wax skin and its making method | |
| CN102747171A (en) | Wet processing method of waterproof shoe upper leather | |
| CN114231669B (en) | Compact leather crust leather process | |
| CN110938716B (en) | Method for manufacturing cow double-layer waterproof leather | |
| CN112376297B (en) | Waterproof agent, dyeing agent and environment-friendly dyeing process for chrome-free tanned sheep-cut napped leather | |
| CN112391857B (en) | Dyeing process for improving leveling property of sheep sheared fine hair leather | |
| CN114941043A (en) | Retanning and dyeing method and application of environment-friendly cattle leather | |
| CN110923371B (en) | Environment-friendly wet dyeing and finishing process for preparing original thick high-grade soft sofa leather |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201211 |
|
| RJ01 | Rejection of invention patent application after publication |