CN102839237A - Novel leather retanning method - Google Patents
Novel leather retanning method Download PDFInfo
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- CN102839237A CN102839237A CN2012103677467A CN201210367746A CN102839237A CN 102839237 A CN102839237 A CN 102839237A CN 2012103677467 A CN2012103677467 A CN 2012103677467A CN 201210367746 A CN201210367746 A CN 201210367746A CN 102839237 A CN102839237 A CN 102839237A
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Abstract
The invention discloses a novel leather retanning method, which comprises the following steps: 1) taking wet blue leather into a drum; 2) washing, adding water at 40 DEG C and degreasant to be rotated for 60 minutes; 3) neutralizing, adding water at 35 DEG C and dye to be rotated for 10 minutes, adding fatty aldehyde to be rotated for 30 minutes, and adding a neutralizer to be rotated for 60 minutes, so that the pH value is 4.8-5.0; 4) tanning, adding water at 30 DEG C and dye to be rotated for 30 minutes, adding water at 50 DEG C, adding a leather retanning agent to be rotated for 60 minutes, and adding formic acid to be rotated for 30 minutes, and 5) washing and discharging leather at 20-25 DEG C. According to the novel leather retanning method disclosed by the invention, the compactness, the fullness and the softness of the leather are improved; light, thin and soft requirements of a leather product are accorded, and the retanning method disclosed by the invention is simple in process, short in time cycle, fewer in technological processes, and less in sewage discharge, and has economic benefit and environmental benefit.
Description
Technical field
The invention belongs to the leather tanning technical field, be specifically related to a kind of New-type leather retanning method.
Background technology
Tanning is to make rawhide become the physical and chemical process of leather through tanning agent, is the important procedure of process hides and system fur coat.Tanning is generally carried out in rotary drum, through the mechanical effect of rotary drum, promotes the uniformly penetrating of various chemical materialss, accomplishes the chemical action of preparation and skin.The effect of tanning is the porousness that increases fibrous texture; Improve the wet-hot aging performance of collegen filament, improve the chemically-resistant effect of collagen and the effect of anti-mikrobe and enzyme, reduce the binding property between collagenous fiber bundle, fiber, the protofibril; Reduce the distortion of wet leather; Reduce the shrinkage degree of wet leather when drying, reduce the regularity that the collegen filament fine structure is arranged, change the appearance of grain layer.
Retanning is the processing that utilizes retanning agent that the main back of tanning is carried out at the system skin, to remedy main tanning in the deficiency of some aspect of performance.Suitable retanning can give leather good performance, improves the compactibility and the flexibility of leather, changes the surface charge of leather, reduces the position difference, promotes even dyeing.General leather production wants to reach light, thin, the soft requirement of leather products, the retanning complex process that needs, and the time cycle is long, and wastewater discharge is big, pollutes to environment.
Summary of the invention
Problems such as the purpose of this invention is to provide a kind of New-type leather retanning method, improve the leather degree of packing, fullness ratio and pliability, it is loaded down with trivial details to solve present leather technology, and long flow path and sewage discharge are many.
In order to realize above purpose, the technical scheme that the present invention adopted is: a kind of New-type leather retanning method comprises the following steps:
1) wet blue of getting 100 weight parts is put into rotary drum;
2) washing: add 40 ℃ water of 200～300 weight parts, the grease-removing agent of 0.2～0.3 weight part, rotate 60min;
3) neutralization: add 35 ℃ water of 100～150 weight parts, the dyestuff of 0.8～1 weight part, rotate 10min, add the alkanoic of 2 weight parts, rotate 30min, add the neutralizing agent of 2～2.5 weight parts, rotate 60min, making its pH value is 4.8～5.0;
4) tanning: add 30 ℃ water of 50 weight parts, the dyestuff of 2～2.5 weight parts, rotate 30min, add 50 ℃ water of 80 weight parts, the leather retanning agent of 8～10 weight parts, rotate 60min, add the formic acid of 1.5～2 weight parts, rotate 30min;
5) wash out skin for 20～25 ℃.
Described grease-removing agent is a glycerin fatty acid ester.
Described neutralizing agent is the phenol synthetic tanning agent.
Described leather retanning agent is any one in trimeric cyanamide synthetic tanning agent, Dyhard RU 100 resin tanning agent, naphthalene class synthetic tanning agent, vegetable tanning agent, sulphiting synthetic oil, sulfonated synthetic oil, the sulfation synthetic oil.
The rotating speed of said rotation is 12～16rpm.
In the New-type leather retanning method of the present invention, step 2) adding water and grease-removing agent is grease and dirt and the unconjugated material that cleans leather surface.Step 3) adds entry and dyestuff makes leather surface painted; Adding alkanoic makes leather increase ventilation property and pliability; The electric charge of neutralization stage adjustment leather surface and in leather in free acid, permeate with material for next step operation and to prepare.Adding entry and dyestuff in the step 4) dyes and makes solid colour in the leather table; Improve bath temperature, impel the subsequent material infiltration; Add leather retanning agent, make leather increase the degree of packing, pliability and fullness ratio, improve comfort level; Add formic acid, the material and the leather fiber that add early stage are combined, be fixed in the leather, make leather reach production requirement.
New-type leather retanning method of the present invention adopts steps such as washing, neutralization, tanning, has improved the degree of packing, fullness ratio and the pliability of leather, meets light, thin, the soft requirement of leather.New-type leather retanning method of the present invention, technology is simple, the time cycle is short, technical process is few, in the production process sewage discharge few, have economic benefit and environmental benefit.
Embodiment
Below in conjunction with embodiment the present invention is described further:
Embodiment 1
The New-type leather retanning method of present embodiment comprises the following steps:
1) wet blue of getting 100kg is put into rotary drum;
2) washing: add 40 ℃ the water of 200kg, the glycerin fatty acid ester of 0.3kg, 16rpm rotates 60min;
3) neutralization: add 35 ℃ the water of 150kg, the dyestuff of 0.8kg, 16rpm rotates 10min, adds the alkanoic of 2kg, and 16rpm rotates 30min, adds the phenol synthetic tanning agent of 2kg, and 16rpm rotates 60min, and making its pH value is 4.8;
4) tanning: add 30 ℃ the water of 50kg, the dyestuff of 2.5kg, 16rpm rotates 30min, adds 50 ℃ the water of 80kg, the Dyhard RU 100 resin tanning agent of 8kg, and 16rpm rotates 60min, adds the formic acid of 1.5kg, and 16rpm rotates 30min;
5) wash out skin for 20 ℃.
Embodiment 2
The New-type leather retanning method of present embodiment comprises the following steps:
1) wet blue of getting 100kg is put into rotary drum;
2) washing: add 40 ℃ the water of 250kg, the glycerin fatty acid ester of 0.2kg, 12rpm rotates 60min;
3) neutralization: add 35 ℃ the water of 130kg, the dyestuff of 1kg, 12rpm rotates 10min, adds the alkanoic of 2kg, and 12rpm rotates 30min, adds the phenol synthetic tanning agent of 2.5kg, and 12rpm rotates 60min, and making its pH value is 5.0;
4) tanning: add 30 ℃ the water of 50kg, the dyestuff of 2kg, 12rpm rotates 30min, adds 50 ℃ the water of 80kg, the trimeric cyanamide synthetic tanning agent of 10kg, and 12rpm rotates 60min, adds the formic acid of 2kg, and 12rpm rotates 30min;
5) wash out skin for 25 ℃.
Embodiment 3
The New-type leather retanning method of present embodiment comprises the following steps:
1) wet blue of getting 100kg is put into rotary drum;
2) washing: add 40 ℃ the water of 300kg, the glycerin fatty acid ester of 0.25kg, 14rpm rotates 60min;
3) neutralization: add 35 ℃ the water of 100kg, the dyestuff of 0.9kg, 14rpm rotates 10min, adds the alkanoic of 2kg, and 14rpm rotates 30min, adds the phenol synthetic tanning agent of 2.2kg, and 14rpm rotates 60min, and making its pH value is 4.9;
4) tanning: add 30 ℃ the water of 50kg, the dyestuff of 2.3kg, 14rpm rotates 30min, adds 50 ℃ the water of 80kg, the naphthalene class synthetic tanning agent of 9kg, and 14rpm rotates 60min, adds the formic acid of 1.7kg, and 14rpm rotates 30min;
5) wash out skin for 22 ℃.
Claims (5)
1. a New-type leather retanning method is characterized in that: comprise the following steps:
1) wet blue of getting 100 weight parts is put into rotary drum;
2) washing: add 40 ℃ water of 200～300 weight parts, the grease-removing agent of 0.2～0.3 weight part, rotate 60min;
3) neutralization: add 35 ℃ water of 100～150 weight parts, the dyestuff of 0.8～1 weight part, rotate 10min, add the alkanoic of 2 weight parts, rotate 30min, add the neutralizing agent of 2～2.5 weight parts, rotate 60min, making its pH value is 4.8～5.0;
4) tanning: add 30 ℃ water of 50 weight parts, the dyestuff of 2～2.5 weight parts, rotate 30min, add 50 ℃ water of 80 weight parts, the leather retanning agent of 8～10 weight parts, rotate 60min, add the formic acid of 1.5～2 weight parts, rotate 30min;
5) wash out skin for 20～25 ℃.
2. New-type leather retanning method according to claim 1 is characterized in that: described grease-removing agent is a glycerin fatty acid ester.
3. New-type leather retanning method according to claim 1 is characterized in that: described neutralizing agent is the phenol synthetic tanning agent.
4. New-type leather retanning method according to claim 1 is characterized in that: described leather retanning agent is any one in trimeric cyanamide synthetic tanning agent, Dyhard RU 100 resin tanning agent, naphthalene class synthetic tanning agent, vegetable tanning agent, sulphiting synthetic oil, sulfonated synthetic oil, the sulfation synthetic oil.
5. New-type leather retanning method according to claim 1 is characterized in that: the rotating speed of said rotation is 12～16rpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210367746.7A CN102839237B (en) | 2012-09-28 | 2012-09-28 | Novel leather retanning method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210367746.7A CN102839237B (en) | 2012-09-28 | 2012-09-28 | Novel leather retanning method |
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| CN102839237A true CN102839237A (en) | 2012-12-26 |
| CN102839237B CN102839237B (en) | 2014-10-29 |
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| CN201210367746.7A Expired - Fee Related CN102839237B (en) | 2012-09-28 | 2012-09-28 | Novel leather retanning method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112041466A (en) * | 2018-03-28 | 2020-12-04 | A·史密特亲子贸易有限公司 | Leather treatment comprising the use of pectin |
| CN116144845A (en) * | 2022-09-08 | 2023-05-23 | 绍兴海滨皮革有限公司 | High-color-fastness water-based three-proofing leather and preparation process thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5744407A (en) * | 1995-03-14 | 1998-04-28 | University Of Central Florida | Photocatalytic face mask |
| CN1368556A (en) * | 2002-03-04 | 2002-09-11 | 四川大学 | Tannin extract type neutralizing agent for leather and its preparing process |
| CN101914637A (en) * | 2010-08-18 | 2010-12-15 | 辉县市明德皮业有限公司 | Chrome-tanned, water-dyed and polished leather manufacturing method |
| CN102517409A (en) * | 2011-11-28 | 2012-06-27 | 郑州科信化工有限公司 | Leather retanning method |
-
2012
- 2012-09-28 CN CN201210367746.7A patent/CN102839237B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5744407A (en) * | 1995-03-14 | 1998-04-28 | University Of Central Florida | Photocatalytic face mask |
| CN1368556A (en) * | 2002-03-04 | 2002-09-11 | 四川大学 | Tannin extract type neutralizing agent for leather and its preparing process |
| CN101914637A (en) * | 2010-08-18 | 2010-12-15 | 辉县市明德皮业有限公司 | Chrome-tanned, water-dyed and polished leather manufacturing method |
| CN102517409A (en) * | 2011-11-28 | 2012-06-27 | 郑州科信化工有限公司 | Leather retanning method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112041466A (en) * | 2018-03-28 | 2020-12-04 | A·史密特亲子贸易有限公司 | Leather treatment comprising the use of pectin |
| CN112041466B (en) * | 2018-03-28 | 2023-04-04 | A·史密特亲子贸易有限公司 | Leather treatment comprising the use of pectin |
| CN116144845A (en) * | 2022-09-08 | 2023-05-23 | 绍兴海滨皮革有限公司 | High-color-fastness water-based three-proofing leather and preparation process thereof |
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| CN102839237B (en) | 2014-10-29 |
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