CN109762950A - A kind of tanning process of the main tan of leather - Google Patents
A kind of tanning process of the main tan of leather Download PDFInfo
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- CN109762950A CN109762950A CN201910174681.6A CN201910174681A CN109762950A CN 109762950 A CN109762950 A CN 109762950A CN 201910174681 A CN201910174681 A CN 201910174681A CN 109762950 A CN109762950 A CN 109762950A
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Abstract
The invention discloses a kind of tanning process of the main tan of leather, belong to leather sector.Using Coriaria sinica tannin extract as vegetable tanning agent, tanning is carried out to clothing leather acid skin, establishes the main tanner skill of sour skin of Coriaria sinica tannin extract, specifically included pickling and ease back, mention alkali, tanning, neutralization, go out to rouse and take horse.Resulting leather softness is high, it is obvious, of light color to thicken, and leather shrinking temperature is up to 75 DEG C or more.This method tanning agent is environmentally protective, and tanning device therefor is at low cost, simple process, high-efficient, leather property is good, is conducive to the cleanly production of leather industry.
Description
Technical field
The present invention relates to a kind of tanning process of the main tan of leather.
Background technique
Tanning agent is the key that rawhide is made to be changed into leather, and the tanning agent applied at present has chrome tanning agent, aluminium tanningagent, zirconium tanning agent, iron
Tanning agent, vegetable tanning agent, aldehyde tanning agent, syntans etc., wherein the leather of chrome tanning agent tanning is good with heatproof water resistance, shrinkage temperature
The advantages that high, is widely used.It is limited due to China's chromium resource, a large amount of pollution can be generated in Chrome Tanning Process, to environment and people
The health of class generates large effect, therefore people always search for the tanning agent of more clean and environmental protection.Vegetable tanning agent is as a kind of
The tanning agent of pure natural extraction, has that environmental pollution is small, nontoxic characteristics such as renewable, degradable, receives more and more attention.Horse
Mulberry is the widely distributed shrub plant in China, tannin constituents rich in, and the present invention is established using Coriaria sinica tannin extract as tanning agent
The main tanner skill of sour skin, the technique is environmentally protective, and operating procedure is simple, and tanning time is short, and tanned leather property is good.
For the problems in the relevant technologies, currently no effective solution has been proposed.
Summary of the invention
It is an object of that present invention to provide a kind of tanning process of the main tan of leather, the technique is real especially by following operating procedure
It is existing:
(1) pickling eases back, and takes clothing leather acid skin weighing label, is put into rotary drum, control temperature is in 30-40 DEG C, liquor ratio
100-300% adds the inorganic acid of 0.5-3% and the Nacl of 5-20%, adjusts pH to 2-5, ease back time 0.5-2h；
(2) alkali is mentioned, the inorganic base of 1-2% is added, adjusts pH to 4-6, time 1-3h；
(3) tanning controls 35-45 DEG C of temperature, liquor ratio 100-200%, and tanning is divided into three phases, 5- is added early period
The Coriaria sinica tannin extract of 10-20%, tanning time 1-2h is added in 10% Coriaria sinica tannin extract, tanning time 0.5-1h, mid-term, and the later period is added
The Coriaria sinica tannin extract of 10-20%, tanning time 1-3h；
(4) it neutralizes, the organic base of 0.5-2% is added, adjust pH to 4.5-6.5, neutralize time 1-2h；
(5) go out drum and take horse, the skin after neutralization is taken out, be placed at room temperature for 10-20h, that is, complete the tanning of leather.
Preferably, the clothing leather acid skin in the step (1) includes with acid skin raw material, nothing made from sheepskin, ox-hide, pigskin
Machine acid includes one of hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid or a variety of mixtures, and Nacl includes sodium chloride, potassium chloride, chlorine
Change one of calcium, sodium sulphate, potassium sulfate, sodium sulfite, sodium hydrosulfide, sodium thiosulfate or a variety of mixtures.
Preferably, the inorganic base in the step (2) is sodium hydroxide, potassium hydroxide, calcium hydroxide, sodium carbonate, carbonic acid
One of potassium, sodium bicarbonate or a variety of mixtures.
Preferably, the Coriaria sinica tannin extract in the step (3) be prepared in Chinese coriaria leaf or Coriaria sinica skin rich in tannin constituents
Extract.
Preferably, the organic base in the step (4) is sodium formate, calcium formate, potassium formate, sodium acetate, calcium acetate, acetic acid
One of potassium, sodium oxalate or a variety of mixtures.
Compared with the relevant technologies, the present invention is had the following technical effect that
The present invention establishes the main tanner skill of sour skin using Coriaria sinica tannin extract as tanning agent, and the technique is environmentally protective, operating procedure letter
Single, tanning time is short, and leather softness is high after tanning, it is obvious, of light color to thicken, and shrinkage temperature is up to 75 DEG C or more.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical solution of the present invention is clearly and completely described, it is clear that institute
The embodiment of description is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention,
Every other embodiment obtained by those of ordinary skill in the art without making creative efforts, belongs to this hair
The range of bright protection.
Embodiment one
Embodiments herein provides a kind of tanning process of main tan of leather, and the technique is especially by following operating procedure
It realizes:
(1) pickling eases back, and takes sheepskin garment leather acid skin weighing label, is put into rotary drum, control temperature is in 30 DEG C, liquor ratio
100%, add 0.5% hydrochloric acid and 5% sodium chloride, adjusts pH to 2, ease back time 0.5h；
(2) alkali is mentioned, 1% sodium hydroxide is added, adjusts pH to 4, time 1h；
(3) tanning controls 35 DEG C of temperature, and 5% Coriaria sinica tannin extract, tanning time is added in liquor ratio 100%, tanning early period
10% Coriaria sinica tannin extract, tanning time 1h is added in 0.5h, mid-term, and 10% Coriaria sinica tannin extract, tanning time 2h is added in the later period；
(4) it neutralizes, 0.5% sodium formate is added, adjust pH to 4.5, neutralize time 1h；
(5) go out drum and take horse, the leather after neutralization is taken out, be placed at room temperature for 10h, that is, complete the tanning of leather.
Embodiment two:
Unlike the embodiments above, a kind of tanning process of the main tan of leather, the technique is walked especially by following operation
It is rapid to realize:
(1) pickling eases back, and takes ox clothing leather acid skin weighing label, is put into rotary drum, control temperature is in 35 DEG C, liquor ratio
150%, add 1% sulfuric acid and 10% sodium sulphate, adjusts pH to 3, ease back time 1h；
(2) alkali is mentioned, 1.5% sodium bicarbonate is added, adjusts pH to 5, time 2h；
(3) tanning controls 40 DEG C of temperature, and 10% Coriaria sinica tannin extract, tanning time is added in liquor ratio 150%, tanning early period
10% Coriaria sinica tannin extract, tanning time 1h is added in 1h, mid-term, and 10% Coriaria sinica tannin extract, tanning time 1h is added in the later period；
(4) it neutralizes, 1% sodium acetate is added, adjust pH to 5, neutralize time 1.5h；
(5) go out drum and take horse, the leather after neutralization is taken out, be placed at room temperature for 15h, that is, complete the tanning of leather.
Embodiment three:
Unlike the embodiments above, a kind of tanning process of the main tan of leather, the technique is walked especially by following operation
It is rapid to realize:
(1) pickling eases back, and takes pig leather acid skin weighing label, is put into rotary drum, control temperature is in 40 DEG C, liquor ratio
200%, add 2% hydrochloric acid and 15% sodium sulphate, adjusts pH to 4, ease back time 2h；
(2) alkali is mentioned, 2% sodium carbonate is added, adjusts pH to 6, time 3h；
(3) tanning controls temperature 45 C, liquor ratio 200%, 5% Coriaria sinica tannin extract, tanning time is added tanning early period
10% Coriaria sinica tannin extract, tanning time 1h is added in 1h, mid-term, and 20% Coriaria sinica tannin extract, tanning time 3h is added in the later period；
(4) it neutralizes, 2% sodium formate is added, adjust pH to 5.5, neutralize time 2h；
(5) go out drum and take horse, the leather after neutralization is taken out, be placed at room temperature for 20h, that is, complete the tanning of leather.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (7)
1. a kind of tanning process of the main tan of leather, which is characterized in that the technique is realized especially by following operating procedure:
(1) pickling eases back, and takes clothing leather acid skin weighing label, is put into rotary drum, control temperature is at 30-40 DEG C, liquor ratio 100-
300%, add the inorganic acid of 0.5-3% and the Nacl of 5-20%, adjusts pH to 2-5, ease back time 0.5-2h；
(2) alkali is mentioned, the inorganic base of 1-2% is added, adjusts pH to 4-6, time 1-3h；
(3) tanning controls 35-45 DEG C of temperature, liquor ratio 100-200%, and tanning is divided into three phases, 5-10% is added early period
Coriaria sinica tannin extract, tanning time 0.5-1h, mid-term be added 10-20% Coriaria sinica tannin extract, tanning time 1-2h, the later period be added 10-
20% Coriaria sinica tannin extract, tanning time 1-3h；
(4) it neutralizes, the organic base of 0.5-2% is added, adjust pH to 4.5-6.5, neutralize time 1-2h；
(5) go out drum and take horse, the skin after neutralization is taken out, be placed at room temperature for 10-20h, that is, complete the tanning of leather.
2. a kind of tanning process of the main tan of leather as described in claim 1, which is characterized in that the clothes in the step (1)
Removing from office sour skin includes with acid skin raw material made from sheepskin, ox-hide, pigskin.
3. a kind of tanning process of the main tan of leather as described in claim 1, which is characterized in that inorganic in the step (1)
Acid includes one of hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid or a variety of mixtures.
4. a kind of tanning process of the main tan of leather as described in claim 1, which is characterized in that the industry in the step (1)
Salt includes one of sodium chloride, potassium chloride, calcium chloride, sodium sulphate, potassium sulfate, sodium sulfite, sodium hydrosulfide, sodium thiosulfate
Or a variety of mixture.
5. a kind of tanning process of the main tan of leather as described in claim 1, which is characterized in that inorganic in the step (2)
Alkali is one of sodium hydroxide, potassium hydroxide, calcium hydroxide, sodium carbonate, potassium carbonate, sodium bicarbonate or a variety of mixtures.
6. a kind of tanning process of the main tan of leather as described in claim 1, which is characterized in that the Coriaria sinica in the step (3)
Tannin extract is the extract rich in tannin constituents for being prepared in Chinese coriaria leaf or Coriaria sinica skin.
7. a kind of tanning process of the main tan of leather as described in claim 1, which is characterized in that organic in the step (4)
Alkali is one of sodium formate, calcium formate, potassium formate, sodium acetate, calcium acetate, potassium acetate, sodium oxalate or a variety of mixtures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910174681.6A CN109762950B (en) | 2019-03-08 | 2019-03-08 | Tanning process for leather main tanning |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910174681.6A CN109762950B (en) | 2019-03-08 | 2019-03-08 | Tanning process for leather main tanning |
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| CN109762950A true CN109762950A (en) | 2019-05-17 |
| CN109762950B CN109762950B (en) | 2021-11-02 |
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| CN201910174681.6A Expired - Fee Related CN109762950B (en) | 2019-03-08 | 2019-03-08 | Tanning process for leather main tanning |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113718067A (en) * | 2021-09-06 | 2021-11-30 | 广州施华科技有限公司 | Novel Ecotan leather tanning process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104962667A (en) * | 2015-06-23 | 2015-10-07 | 兴业皮革科技股份有限公司 | Quick producing process for pure vegetable tanning cattle leather |
| CN105803131A (en) * | 2014-12-29 | 2016-07-27 | 焦作隆丰皮草企业有限公司 | Tanning method of leather |
| CN106755630A (en) * | 2017-01-09 | 2017-05-31 | 河北科技大学 | A kind of leather tanning method |
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2019
- 2019-03-08 CN CN201910174681.6A patent/CN109762950B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105803131A (en) * | 2014-12-29 | 2016-07-27 | 焦作隆丰皮草企业有限公司 | Tanning method of leather |
| CN104962667A (en) * | 2015-06-23 | 2015-10-07 | 兴业皮革科技股份有限公司 | Quick producing process for pure vegetable tanning cattle leather |
| CN106755630A (en) * | 2017-01-09 | 2017-05-31 | 河北科技大学 | A kind of leather tanning method |
Non-Patent Citations (1)
| Title |
|---|
| 程凤侠: "《现代毛皮工艺学》", 30 September 2013 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113718067A (en) * | 2021-09-06 | 2021-11-30 | 广州施华科技有限公司 | Novel Ecotan leather tanning process |
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