CN106191336A - A kind of method for improving leather yield of leather - Google Patents
A kind of method for improving leather yield of leather Download PDFInfo
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- CN106191336A CN106191336A CN201610687365.5A CN201610687365A CN106191336A CN 106191336 A CN106191336 A CN 106191336A CN 201610687365 A CN201610687365 A CN 201610687365A CN 106191336 A CN106191336 A CN 106191336A
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- leather
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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
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/08—Chemical tanning by organic agents
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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 for improving leather yield of leather, soften including by raw material, recover Cortex Dictamni state, remove unwanted composition in fur processing, after head layer and two layers are separated by complete thick graywall by split operation, two layers of graywall put into tanning drum and carry out deliming, softening, pickling；It is subsequently adding glutaraldehyde tanning agent 5% in rotary drum, rotates 180min, carry out sufficient permeable reactive, until the skin heart occurs light yellow；Adding water 200%, controlling temperature is 45 DEG C；Add rewetting agent 0.2%, rotate 60min, then water is discharged；Continuously adding water 150%, controlling temperature is 45 DEG C；Add sodium formate 2%；Add sodium bicarbonate 0.3%, rotate 30min, control pH value between 5.4 ± 0.1；Add acid protease 2.5%, rotate 120min, then water is discharged；Mix again technique；Household leather is dyeed；Carry out emulsion oil-filling.
Description
Technical field
The present invention relates to the manufacture method of a kind of household leather, refer more particularly to a kind of method for improving leather yield of leather
Background technology
Day by day focusing on the epoch of ecology, environmental protection at this, leather industry will be faced with formidable challenges, at home leather industry
Actively carry out corium mark Ecology Leather certification, it is stipulated that in Ecology Leather, the content of relevant chemical substance that may be present is necessary
In the range of being strict controlled in limitation.
In existing household leather, yield of leather is always related to the problem whether company gets a profit, and most of factories the most do not formulate
Go out a set of scheme improving yield of leather for oneself factory's leather, or there is technical deficiency, fall flat.
Summary of the invention
It is an object of the invention to overcome above-mentioned deficiency present in prior art, and provide one to obtain for improving leather
The method of leather rate.
The present invention solves the problems referred to above and be the technical scheme is that
A kind of method for improving leather yield of leather, comprises the following steps:
(1) raw material is softened, recover Cortex Dictamni state, remove unwanted composition in fur processing, pass through at complete thick graywall
After head layer and two layers are separated by split operation, two layers of graywall put into tanning drum and carry out deliming, softening, pickling；It is subsequently adding penta
Two aldehyde tanning agents 5% rotate 180min in rotary drum, carry out sufficient permeable reactive, until the skin heart occurs light yellow；
(2) adding water 200%, controlling temperature is 45 DEG C；
(3) add rewetting agent 0.2%, rotate 60min, then water is discharged；
(4) continuously adding water 150%, controlling temperature is 45 DEG C；
(5) sodium formate 2% is added；
(6) add sodium bicarbonate 0.3%, rotate 30min, control pH value between 5.4 ± 0.1；
(7) add acid protease 2.5%, rotate 120min, then water is discharged；
(8) mix again technique；
(9) household leather is dyeed；
(10) emulsion oil-filling is carried out；
The most each percent is each composition and accounts for the percetage by weight of skin.
Described retanning process comprises the following steps:
(1) water adding 100% is put into and is mixed in rotary drum again, and controlling temperature is 35 DEG C, control pH value 5.1 ± 0.1 it
Between；
(2) add fatting agent 1% and rotate 15min；
(3) addition acrylic acid double tanning agent 3% permeates and mixes again 45 minutes；
(4) adding fatting agent 2%, dispersant 1%, vegetable tanning agent 5%, mix 30min again；Add fatting agent 2%, alternative
Syntans 4%, vegetable tanning agent 5% are mixed 30min again；
(5) dyestuff penetration reaction 60min is added, until the heart that dyes；
(6) add the water of 80%, control temperature and be 48-50 DEG C；
(7) add fatting agent 6%, polymeric type retanning agent 2%, mix again 45 minutes；
(8) add antifungus agent 0.2% and rotate 30 minutes；
(9) adding formic acid 1.2% at twice, rotate 30min respectively, regulation pH value is between 3.6 ± 0.1；
(10) washing goes out drum three times；
The most each percent is each composition and accounts for the percetage by weight of skin.
The present invention compared with prior art, has the following advantages and effect: add acid protease in backwater operation, this
Series products can soften the grain of leather, removes hide fiber interstitial, loose hide fiber.Make that grain side of leather is clear, overall leveling, all
Evenness is good, remove wrinkle thus increase area yield of leather.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage 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 present invention rather than complete
The embodiment in portion.
A kind of method for improving leather yield of leather of the present invention is as follows:
A kind of method for improving leather yield of leather, comprises the following steps:
(1) raw material is softened, recover Cortex Dictamni state, remove unwanted composition in fur processing, pass through at complete thick graywall
After head layer and two layers are separated by split operation, two layers of graywall put into tanning drum and carry out deliming, softening, pickling；It is subsequently adding penta
Two aldehyde tanning agents 5% rotate 180min in rotary drum, carry out sufficient permeable reactive, until the skin heart occurs light yellow；
(2) adding water 200%, controlling temperature is 45 DEG C；
(3) add rewetting agent 0.2%, rotate 60min, then water is discharged；
(4) continuously adding water 150%, controlling temperature is 45 DEG C；
(5) sodium formate 2% is added；
(6) add sodium bicarbonate 0.3%, rotate 30min, control pH value between 5.4 ± 0.1；
(7) add acid protease 2.5%, rotate 120min, then water is discharged；
(8) mix again technique；
(9) household leather is dyeed；
(10) emulsion oil-filling is carried out；
The most each percent is each composition and accounts for the percetage by weight of skin.
Described retanning process comprises the following steps:
(1) water adding 100% is put into and is mixed in rotary drum again, and controlling temperature is 35 DEG C, control pH value 5.1 ± 0.1 it
Between；
(2) add fatting agent 1% and rotate 15min；
(3) addition acrylic acid double tanning agent 3% permeates and mixes again 45 minutes；
(4) adding fatting agent 2%, dispersant 1%, vegetable tanning agent 5%, mix 30min again；Add fatting agent 2%, alternative
Syntans 4%, vegetable tanning agent 5% are mixed 30min again；
(5) dyestuff penetration reaction 60min is added, until the heart that dyes；
(6) add the water of 80%, control temperature and be 48-50 DEG C；
(7) add fatting agent 6%, polymeric type retanning agent 2%, mix again 45 minutes；
(8) add antifungus agent 0.2% and rotate 30 minutes；
(9) adding formic acid 1.2% at twice, rotate 30min respectively, regulation pH value is between 3.6 ± 0.1；
(10) washing goes out drum three times；
The most each percent is each composition and accounts for the percetage by weight of skin.
Retanning after household leather shaving.It not only acts as filling effect, moreover it is possible to changing the surface charge of leather, beneficially dyestuff is equal
Even coloring and the uniformly penetrating of fatting agent, make the leather after dyeing bright in colour and leather body is plentiful.To leather body closely, grain surface disability relatively
Few chrome tanning upper shoes leather, available mineral-type tanning agent, syntans retanning, make finished leather more plentiful, soft.Aniline leather or semibenzene
Amine leather usable resins tanning agent or syntans retanning.Modify upper leather and can carry out the retanning of appropriateness with syntans, vegetable tanning agent.
Hereafter, household leather is carried out dyeing process.Light leather is required for dyeing after tanning, to improve the use value of leather.
The capital equipment contaminated is rotary drum.The mechanism of rotary drum can accelerate the infiltration of dyestuff, makes even dyeing, the most also can be same
Emulsion oil-filling is carried out in one rotary drum.The colouring method of light leather has dip-dye, brush dye and spray-painting etc..
Brush dye is on the surface of wet leather by the dye liquor brush that dissolved in advance, extension dry dry during dyestuff gradually by grain
Absorb and colour.Brush dye can save dyestuff, but work efficiency is low, easily causes aberration and color flower, is not therefore widely adopted.
Spray-painting is to spray dyestuff on dyed leather, hides the defect of grain further, make grain coloring be more uniformly distributed,
Full, and improve tone, strengthen Color.Wet leather also can the direct spray-painting without dip-dye, to adapt to small lot batch manufacture and color
The change in pool.Modern spray-painting generally uses premetallized dye, makes grain tone plentiful, also can produce different colour effects.
Finally carrying out fat liquored operation, tanned wet leather is as without oiling, and in dried leather, fiber can be mutually
Bonding, reduces the lubricity between fiber, causes finished leather stiff.Oiling can make leather complications soft, resistance to, and amount of grease can also play
Slight supplementary tanning effect, strengthens the toughness of leather.The general emulsion using oil-in-water type of oiling, in leather, hygrometric state is carried out.Chromium
Tan upper shoes leather, after anionic emulsion refuels, adds appropriate cationic fat liquor the most again, to increase the oils and fats knot of grain layer
Resultant, contributes to pasting board or the vacuum drying in later stage.
The addition how many impact on scytoblastema yield of leather and the state of scytoblastema of acidic protein enzyme dosage is carried out by the present invention
Experiment, as shown in the table:
| Acidic protein enzyme dosage/% | Scytoblastema state | Scytoblastema yield of leather |
| 0 | Not loose side, grain is tight, buttocks is stiff | 99.5 |
| 1.5 | Loose side, grain be not flexible, buttocks shows slightly stiff | 101.6 |
| 2.5 | Good evenness soft, overall, buttocks are the most stiff | 103.2 |
| 3.5 | Soft, limit abdominal part loose side | 104.5 |
From upper table it is recognised that when use acid protease be 2.5% time, the state of scytoblastema be soft, overall all
Evenness is good, buttocks is the most stiff, and yield of leather is 103.2.Compared to the consumption of other acid protease, shown by 2.5%
Result is best.
Above content described in this specification is only to patent example explanation of the present invention.Belonging to the present invention
Described specific embodiment can be made various amendment or supplements or use similar by those skilled in the art
Mode substitutes, and without departing from the content of description of the invention or surmount scope defined in the claims, all should belong to
In protection scope of the present invention.
Claims (2)
1., for the method improving leather yield of leather, comprise the following steps:
(1) raw material is softened, recover Cortex Dictamni state, remove unwanted composition in fur processing, pass through split at complete thick graywall
After head layer and two layers are separated by operation, two layers of graywall put into tanning drum and carry out deliming, softening, pickling；It is subsequently adding glutaraldehyde
Tanning agent 5% rotates 180min in rotary drum, carries out sufficient permeable reactive, until the skin heart occurs light yellow；
(2) adding water 200%, controlling temperature is 45 DEG C；
(3) add rewetting agent 0.2%, rotate 60min, then water is discharged；
(4) continuously adding water 150%, controlling temperature is 45 DEG C；
(5) sodium formate 2% is added；
(6) add sodium bicarbonate 0.3%, rotate 30min, control pH value between 5.4 ± 0.1；
(7) add acid protease 2.5%, rotate 120min, then water is discharged；
(8) mix again technique；
(9) household leather is dyeed；
(10) emulsion oil-filling is carried out；
The most each percent is each composition and accounts for the percetage by weight of skin.
A kind of method for improving leather yield of leather the most according to claim 1, it is characterised in that: described retanning work
Skill comprises the following steps:
(1) water of addition 100% is put into and is mixed in rotary drum again, and controlling temperature is 35 DEG C, controls pH value between 5.1 ± 0.1；
(2) add fatting agent 1% and rotate 15min；
(3) addition acrylic acid double tanning agent 3% permeates and mixes again 45 minutes；
(4) adding fatting agent 2%, dispersant 1%, vegetable tanning agent 5%, mix 30min again；Add fatting agent 2%, alternative synthesis
Tanning agent 4%, vegetable tanning agent 5% are mixed 30min again；
(5) dyestuff penetration reaction 60min is added, until the heart that dyes；
(6) add the water of 80%, control temperature and be 48-50 DEG C；
(7) add fatting agent 6%, polymeric type retanning agent 2%, mix again 45 minutes；
(8) add antifungus agent 0.2% and rotate 30 minutes；
(9) adding formic acid 1.2% at twice, rotate 30min respectively, regulation pH value is between 3.6 ± 0.1；
(10) washing goes out drum three times；
The most each percent is each composition and accounts for the percetage by weight of skin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610687365.5A CN106191336B (en) | 2016-08-18 | 2016-08-18 | A method of for improving leather yield of leather |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610687365.5A CN106191336B (en) | 2016-08-18 | 2016-08-18 | A method of for improving leather yield of leather |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106191336A true CN106191336A (en) | 2016-12-07 |
| CN106191336B CN106191336B (en) | 2019-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610687365.5A Active CN106191336B (en) | 2016-08-18 | 2016-08-18 | A method of for improving leather yield of leather |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114214470A (en) * | 2021-12-08 | 2022-03-22 | 兴业皮革科技股份有限公司 | Cattle shoe upper leather pretreatment method based on season change and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2016
- 2016-08-18 CN CN201610687365.5A patent/CN106191336B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114214470A (en) * | 2021-12-08 | 2022-03-22 | 兴业皮革科技股份有限公司 | Cattle shoe upper leather pretreatment method based on season change and application thereof |
| CN114214470B (en) * | 2021-12-08 | 2023-10-27 | 兴业皮革科技股份有限公司 | Pretreatment method of cattle vamp leather based on season transformation and application thereof |
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| Publication number | Publication date |
|---|---|
| CN106191336B (en) | 2019-02-01 |
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