CN106834563A - A kind of method of few salt pickling, tanning leather - Google Patents
A kind of method of few salt pickling, tanning leather Download PDFInfo
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- CN106834563A CN106834563A CN201710049179.3A CN201710049179A CN106834563A CN 106834563 A CN106834563 A CN 106834563A CN 201710049179 A CN201710049179 A CN 201710049179A CN 106834563 A CN106834563 A CN 106834563A
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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
- C14C1/00—Chemical treatment prior to tanning
- C14C1/04—Soaking
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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
- C14C1/00—Chemical treatment prior to tanning
- C14C1/08—Deliming; Bating; Pickling; Degreasing
-
- 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
- C14C3/28—Multi-step processes
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- 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 kind of method of few salt pickling, tanning leather, including raw material is softened, recover fresh hide state etc., and add deliming agent, degreasing agent, macerating enzyme etc. to rotate repeatedly, by techniques such as manual detection PH, temperature and Baume degrees, temperature is finally controlled to go out drum., by modified technique, using the technique tan leather of few salt pickling, physical and mechanical properties is excellent, significantly reduces the concentration of the CL concentration and SO42 in waste water, greatly reduces pollution of the neutral salt to environment for the present invention.
Description
Technical field
The present invention relates to a kind of preparation method of leather, more particularly to a kind of method of few salt pickling, tanning leather.
Background technology
In recent years, the neutral salt pollution in leather making process increasingly causes the attention of process hides.Because neutral salt will not be rapid
And significantly the life to people is impacted, tend to ignored.However, the accumulation of neutral salt and its intractable feature
Make water and soil gradually salinization, biological electrolyte dysequilibrium, the living environment for ultimately resulting in people wrecks.
The neutral salt discharged in leather making process is mainly derived from two operations, and one preserves rawhide using salted method uses
Salt, accounts for the 40%~50% of total release, and another operation is to suppress the salt used by acid plumping during pickling, accounts for neutral salt and always arranges
High-volume 30%~40%.
Process for producing leather flow is at present：Immersion → liming → without ammonia deliming → pickling → organic tanning agent pre-tanning → white wet
Skin shaving → combination tannage → filling → dyeing → stuffing → water squeezing toggling → buffing → fall soft → covering with paint → finished product.Both at home and abroad
The salt-free pickling technology of concern, the inorganic acid that main use can suppress pelt expansion completes pickling operation, so as to reduce neutrality
Salt pollutes.
Current production technology also needs further improvement, reduces environmental pollution and improves the performance of leather.
The content of the invention
It is an object of the invention to provide a kind of method of new tanning finished leather, few salt pickling, tanning of the invention into
Leather tensile strength, tearing strength and elongation at break are superior to the finished leather of traditional pickling, tanning, and physical and mechanical properties is excellent.
The present invention the used technical scheme that solves the above problems is：
A kind of method of few salt pickling, tanning leather, it is characterised in that comprise the following steps：
(1) raw material is softened, recovers fresh hide state, remove unwanted composition in fur processing, passed through in full thickness graywall
Split operation separates head layer and two layers；
(2) water 120% is added, it is 45 DEG C to control temperature；
(3) sodium pyrosulfite 0.4% and deliming agent 0.6% are added, 30min is rotated, then water is discharged；
(4) water 150% is continuously added, controls temperature for 31 ± 1 DEG C, rotate 15min, then discharge water；
(5) water 80% is continuously added, it is 31 ± 1 DEG C to control temperature；
(6) degreasing agent 0.3% and deliming agent 1.1% are added, 50min is rotated；
(7) pH value is detected, control pH value is between 8.0 ± 0.2；
(8) whether the saturating heart of hand inspection deliming, checks that otch phenolphthalein reagent is colourless；
(9) macerating enzyme 0.5% is added, 40min is rotated, 10min is suspended after often rotating 20min；
(10) pH value and temperature are detected, control pH value controls 31 ± 1 DEG C of temperature between 8.0 ± 0.2；
(11) whether hand inspection softens, buttocks bubble whether homogeneous soft, then water is discharged；
(12) 400% is added water, it is 18 ± 5 DEG C to control temperature, flowing water washing, and control time is 30-40min, then by water
50% discharge；
(13) pH value is detected, control pH value is between 7.5 ± 0.5；
(14) 50% is added water, it is 18 ± 5 DEG C to control temperature, winter, summer was near lower limit near higher limit；
(15) industrial refined salt 3% is added, detection Baume degrees is 6.0 ± 0.5；
(16) pre- fatting agent 0.4% is added, by pre- fatting agent according to 1 before addition:3 warm water are melted, and rotate 20min；
(17) salt-free pickling pretanning agent 1.5% is added, 30min is rotated；
(18) formic acid 0.4% of purity 85% is added, by formic acid according to 1 before addition:The dilution of 5 cold water is melted, and is rotated
20min；
(19) the fur sulfuric acid 0.4% of purity 98% is added, by fur sulfuric acid according to 1 before addition:10 cold water dilute
Melt, rotate 20min；
(20) the fur sulfuric acid 0.4% of purity 98% is added, by fur sulfuric acid according to 1 before addition:10 cold water dilute
Melt, rotate 60min, 10min is suspended after often rotating 20min；
(21) detection pH value, temperature and Baume degrees, control pH value control 24 ± 3 DEG C of temperature, control between 2.8-3.2
Baume degrees processed is 6.0 ± 0.5；
(22) artificial pickling checks the saturating heart, and otch bromocresol green inspection shows full yellow；
(23) chrome-free tanning agent 1.5% is added, 30min is rotated；
(24) chrome-free tanning agent 1.5% is added, 150min is rotated；
(25) sodium formate 0.5% of purity 96% is added, 30min is rotated；
(26) add and carry alkaline agent 0.25%, rotate 180min；
(27) detection pH value, temperature, control pH value control 37 ± 3 DEG C of temperature between 3.9-4.3；
(28) water 50% is continuously added, it is 35 ± 3 DEG C to control temperature；
(29) add and carry alkaline agent 0.05%, alkaline agent will be carried before addition according to 1:The dilution of 10 warm water is melted；
(30) syntans 4% is added, 150min is rotated；
(31) water 150% is continuously added, it is 33 ± 3 DEG C to control temperature；
(32) degreasing agent 0.2% is added, 15min is rotated；
(33) detection pH value, temperature, control pH value control 30 ± 3 DEG C of temperature between 4.0-4.4；
(34) 30 ± 3 DEG C of temperature of control goes out drum；
Each percentage is the percetage by weight that each composition accounts for skin above.
Preferably, described deliming agent uses deliming without ammonium agent.
Preferably, described degreasing agent uses alkaline defatting agent.
Preferably, described salt-free pickling pretanning agent and the syntans use nonmetallic salt-free pickling pretanning agent.
Preferably, described macerating enzyme is used with the complex enzyme formulation of trypsase.
Preferably, the described alkaline agent that carries carries alkaline agent using inorganic.
The present invention compared with prior art, with following technique effect：
Few salt pickling, tanning of the invention significantly reduces the concentration of CL- concentration and SO42- in waste water, greatly reduces
Pollution of the neutral salt to environment.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in the embodiment of the present invention
Technical scheme is clearly and completely described, it is clear that described embodiment is a part of embodiment of the invention, rather than complete
The embodiment in portion.
The method of a kind of few salt pickling, tanning leather of the invention, it is characterised in that comprise the following steps：
(1) raw material is softened, recovers fresh hide state, remove unwanted composition in fur processing, passed through in full thickness graywall
Split operation separates head layer and two layers；
(2) water 120% is added, it is 45 DEG C to control temperature；
(3) sodium pyrosulfite 0.4% and deliming agent 0.6% are added, 30min is rotated, then water is discharged；
(4) water 150% is continuously added, controls temperature for 31 ± 1 DEG C, rotate 15min, then discharge water；
(5) water 80% is continuously added, it is 31 ± 1 DEG C to control temperature；
(6) degreasing agent 0.3% and deliming agent 1.1% are added, 50min is rotated；
(7) pH value is detected, control pH value is between 8.0 ± 0.2；
(8) whether the saturating heart of hand inspection deliming, checks that otch phenolphthalein reagent is colourless；
(9) macerating enzyme 0.5% is added, 40min is rotated, 10min is suspended after often rotating 20min；
(10) pH value and temperature are detected, control pH value controls 31 ± 1 DEG C of temperature between 8.0 ± 0.2；
(11) whether hand inspection softens, buttocks bubble whether homogeneous soft, then water is discharged；
(12) 400% is added water, it is 18 ± 5 DEG C to control temperature, flowing water washing, and control time is 30-40min, then by water
50% discharge；
(13) pH value is detected, control pH value is between 7.5 ± 0.5；
(14) 50% is added water, it is 18 ± 5 DEG C to control temperature, winter, summer was near lower limit near higher limit；
(15) industrial refined salt 3% is added, detection Baume degrees is 6.0 ± 0.5；
(16) pre- fatting agent 0.4% is added, by pre- fatting agent according to 1 before addition:3 warm water are melted, and rotate 20min；
(17) salt-free pickling pretanning agent 1.5% is added, 30min is rotated；
(18) formic acid 0.4% of purity 85% is added, by formic acid according to 1 before addition:The dilution of 5 cold water is melted, and is rotated
20min, adds formic acid, is combined between the collagen for making scytoblastema, makes skin more consolidation plentiful, and the effect of chrome tanning agent is to help pairing
The formation of key, combines collagen, thus, the consumption that chromium rubs agent can be reduced using formic acid, so that more environmentally-friendly；
When in the prior art, using inorganic picking acid, scytoblastema water swelling, thus prior art needs Jia 8%~10%
Salt carry out deacidification swelling, after formic acid, scytoblastema water swelling reduce, so as to the consumption of salt can be reduced.Formic acid herein may be used also
Replaced with the acid of sulfone class, specifically using sulfone quasi-oligomer.
(19) the fur sulfuric acid 0.4% of purity 98% is added, by fur sulfuric acid according to 1 before addition:10 cold water dilute
Melt, rotate 20min；
(20) the fur sulfuric acid 0.4% of purity 98% is added, by fur sulfuric acid according to 1 before addition:10 cold water dilute
Melt, rotate 60min, 10min is suspended after often rotating 20min；
(21) detection pH value, temperature and Baume degrees, control pH value control 24 ± 3 DEG C of temperature, control between 2.8-3.2
Baume degrees processed is 6.0 ± 0.5；
(22) artificial pickling checks the saturating heart, and otch bromocresol green inspection shows full yellow；
(23) chrome-free tanning agent 1.5% is added, 30min is rotated；
(24) chrome-free tanning agent 1.5% is added, 150min is rotated；
(25) sodium formate 0.5% of purity 96% is added, 30min is rotated；
(26) add and carry alkaline agent 0.25%, rotate 180min；
(27) detection pH value, temperature, control pH value control 37 ± 3 DEG C of temperature between 3.9-4.3；
(28) water 50% is continuously added, it is 35 ± 3 DEG C to control temperature；
(29) add and carry alkaline agent 0.05%, alkaline agent will be carried before addition according to 1:The dilution of 10 warm water is melted；
(30) syntans 4% is added, 150min is rotated；
(31) water 150% is continuously added, it is 33 ± 3 DEG C to control temperature；
(32) degreasing agent 0.2% is added, 15min is rotated；
(33) detection pH value, temperature, control pH value control 30 ± 3 DEG C of temperature between 4.0-4.4；
(34) 30 ± 3 DEG C of temperature of control goes out drum；
Each percentage is the percetage by weight that each composition accounts for skin above.
Wherein, deliming agent uses deliming without ammonium agent.Degreasing agent uses alkaline defatting agent.Salt-free pickling pretanning agent and the conjunction
Nonmetallic salt-free pickling pretanning agent is used into tanning agent.Macerating enzyme is used with the complex enzyme formulation of trypsase.Alkaline agent is carried using nothing
Machine carries alkaline agent.
Performance test of the invention such as following table：
By upper table, the Leather Properties that the technical solution adopted by the present invention is produced are superior, meet the requirements.The present invention changes
Enter Process for producing leather；Improve product quality, can improve the absorptivity of other materials to save chemical materials and reduce leather dirt
Dye；It is suitable for environmental requirement；Increase economic benefit.In leather industry production, the method will increasingly give play to important work
With.
The chemical composition of the pre- fatting agent in the present embodiment is phosphatization grease, and it contains special emulsifying agent, thus with
Lower feature：The infiltration of material during pickling, tanning can be accelerated；With good exhaustion rate, it is difficult to be extracted from leather；
With high resiliency grain and outstanding pliability；With outstanding light resistance, heat-resisting xanthochromia shape.
Macerating enzyme in the present embodiment is specially Da Weizimu CBK ox-hide macerating enzymes, and its product performance is：Emollescence depth
Enter, uniformly, stably, can leniently loose hide fiber, the grain for not resulting in scytoblastema damages；Can improve finished leather pliability,
The flat fineness of grain, reduction position is poor, increases area yield of leather；The growth trace excellent of skin is eliminated, line effect is opened obvious；Can
Loose scurf, depigmentation is removed, make pelt relatively white.
Deliming agent in the present embodiment is specially up to Willie card DLA deliming without ammonium agent, is a kind of organic acid and inorganic acid salt
Mixture, its product performance is：Not ammonium salt-containing, clean environment firendly；Complex soluble in water, therefore energy can be formed with calcium ion
Thoroughly the lime of removal intracutaneous, reaches efficient deliming effect, and deliming skin grain pale complexion is totally, smooth careful；With stronger
Shock-absorbing capacity, does not result in the bust of PH；With preferable permeability, it is adapted to the graywall deliming after non-split and split；Can subtract
Less or eliminate deliming liquid in sulfide discharge and hydrogen sulfide gas produce danger.
Salt-free pickling pretanning agent in the present embodiment is specifically the salt-free auxiliary pickling agents of Da Weilong FSP, is a kind of modified phenol sulphur
Acid, it is a kind of unexpansive acid, can further reduce the consumption of salt, mitigates salt pollution；And can help chromium absorption, infiltration and
Distribution, improves the quality of leather；Contribute to the wrinkle of elimination surface, improve the planarization of grain；For without chrome tanning or wet-white leather,
With the product pickling, be conducive to the infiltration of syntans and vegetable tanning agent；In pickling, the loosening of hair can be reduced.
Alkaline agent is carried for BLANCOROL BA-IN carry alkaline agent in the present embodiment, and its absorption aspect to chromium is carried than traditional
Alkaline agent and to put forward alkali method more efficient.
Based on the embodiment in the present invention, those of ordinary skill in the art are obtained under the premise of creative work is not made
The all other embodiment for obtaining, belongs to the scope of protection of the invention.Although the present invention is illustrated with regard to preferred embodiment
And description, it is understood by those skilled in the art that without departing from scope defined by the claims of the present invention, can be with
Variations and modifications are carried out to the present invention.
Claims (6)
1. a kind of method of few salt pickling, tanning leather, it is characterised in that comprise the following steps：
(1) raw material is softened, recovers fresh hide state, remove unwanted composition in fur processing, split is passed through in full thickness graywall
Operation separates head layer and two layers；
(2) water 120% is added, it is 45 DEG C to control temperature；
(3) sodium pyrosulfite 0.4% and deliming agent 0.6% are added, 30min is rotated, then water is discharged；
(4) water 150% is continuously added, controls temperature for 31 ± 1 DEG C, rotate 15min, then discharge water；
(5) water 80% is continuously added, it is 31 ± 1 DEG C to control temperature；
(6) degreasing agent 0.3% and deliming agent 1.1% are added, 50min is rotated；
(7) pH value is detected, control pH value is between 8.0 ± 0.2；
(8) whether the saturating heart of hand inspection deliming, checks that otch phenolphthalein reagent is colourless；
(9) macerating enzyme 0.5% is added, 40min is rotated, 10min is suspended after often rotating 20min；
(10) pH value and temperature are detected, control pH value controls 31 ± 1 DEG C of temperature between 8.0 ± 0.2；
(11) whether hand inspection softens, buttocks bubble whether homogeneous soft, then water is discharged；
(12) 400% is added water, it is 18 ± 5 DEG C to control temperature, flowing water washing, and control time is 30-40min, then by water 50%
Discharge；
(13) pH value is detected, control pH value is between 7.5 ± 0.5；
(14) 50% is added water, it is 18 ± 5 DEG C to control temperature, winter, summer was near lower limit near higher limit；
(15) industrial refined salt 3% is added, detection Baume degrees is 6.0 ± 0.5；
(16) pre- fatting agent 0.4% is added, by pre- fatting agent according to 1 before addition:3 warm water are melted, and rotate 20min；
(17) salt-free pickling pretanning agent 1.5% is added, 30min is rotated；
(18) formic acid 0.4% of purity 85% is added, by formic acid according to 1 before addition:The dilution of 5 cold water is melted, and rotates 20min；
(19) the fur sulfuric acid 0.4% of purity 98% is added, by fur sulfuric acid according to 1 before addition:The dilution of 10 cold water is melted,
Rotate 20min；
(20) the fur sulfuric acid 0.4% of purity 98% is added, by fur sulfuric acid according to 1 before addition:The dilution of 10 cold water is melted,
60min is rotated, 10min is suspended after often rotating 20min；
(21) detection pH value, temperature and Baume degrees, control pH value control 24 ± 3 DEG C of temperature, controls ripple between 2.8-3.2
U.S. degree is 6.0 ± 0.5；
(22) artificial pickling checks the saturating heart, and otch bromocresol green inspection shows full yellow；
(23) chrome-free tanning agent 1.5% is added, 30min is rotated；
(24) chrome-free tanning agent 1.5% is added, 150min is rotated；
(25) sodium formate 0.5% of purity 96% is added, 30min is rotated；
(26) add and carry alkaline agent 0.25%, rotate 180min；
(27) detection pH value, temperature, control pH value control 37 ± 3 DEG C of temperature between 3.9-4.3；
(28) water 50% is continuously added, it is 35 ± 3 DEG C to control temperature；
(29) add and carry alkaline agent 0.05%, alkaline agent will be carried before addition according to 1:The dilution of 10 warm water is melted；
(30) syntans 4% is added, 150min is rotated；
(31) water 150% is continuously added, it is 33 ± 3 DEG C to control temperature；
(32) degreasing agent 0.2% is added, 15min is rotated；
(33) detection pH value, temperature, control pH value control 30 ± 3 DEG C of temperature between 4.0-4.4；
(34) 30 ± 3 DEG C of temperature of control goes out drum；
Each percentage is the percetage by weight that each composition accounts for skin above.
2. the method for a kind of few salt pickling, tanning leather according to claim 1, it is characterised in that described deliming agent is adopted
Use deliming without ammonium agent.
3. the method for a kind of few salt pickling, tanning leather according to claim 1, it is characterised in that described degreasing agent is adopted
Use alkaline defatting agent.
4. a kind of method of few salt pickling, tanning leather according to claim 1, it is characterised in that described salt-free pickling
Pretanning agent and the syntans use nonmetallic salt-free pickling pretanning agent.
5. the method for a kind of few salt pickling, tanning leather according to claim 1, it is characterised in that described macerating enzyme is adopted
To the complex enzyme formulation of trypsase.
6. the method for a kind of few salt pickling, tanning leather according to claim 1, it is characterised in that the described alkaline agent that carries is adopted
Alkaline agent is carried with inorganic.
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| CN201710049179.3A CN106834563B (en) | 2017-01-20 | 2017-01-20 | A method of few salt pickling, tanning leather |
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| CN201710049179.3A CN106834563B (en) | 2017-01-20 | 2017-01-20 | A method of few salt pickling, tanning leather |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108950101A (en) * | 2018-04-10 | 2018-12-07 | 辽宁富新新材料有限公司 | A kind of automobile skin alkali sulfide free deliming processing method |
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|---|---|---|---|---|
| US20060288494A1 (en) * | 2005-06-24 | 2006-12-28 | Wolverine World Wide, Inc. | Process for producing leather |
| CN102690902A (en) * | 2011-03-21 | 2012-09-26 | 赣州华坚国际鞋城有限公司 | Leather tanning technology |
| CN105132596A (en) * | 2015-07-30 | 2015-12-09 | 兴业皮革科技股份有限公司 | Production technology of cow skin nappa leather |
| WO2016170503A1 (en) * | 2015-04-21 | 2016-10-27 | Osmo S.R.L. | Skins tanning process |
-
2017
- 2017-01-20 CN CN201710049179.3A patent/CN106834563B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060288494A1 (en) * | 2005-06-24 | 2006-12-28 | Wolverine World Wide, Inc. | Process for producing leather |
| CN102690902A (en) * | 2011-03-21 | 2012-09-26 | 赣州华坚国际鞋城有限公司 | Leather tanning technology |
| WO2016170503A1 (en) * | 2015-04-21 | 2016-10-27 | Osmo S.R.L. | Skins tanning process |
| CN105132596A (en) * | 2015-07-30 | 2015-12-09 | 兴业皮革科技股份有限公司 | Production technology of cow skin nappa leather |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108950101A (en) * | 2018-04-10 | 2018-12-07 | 辽宁富新新材料有限公司 | A kind of automobile skin alkali sulfide free deliming processing method |
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| CN106834563B (en) | 2018-08-17 |
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