CN106191336B - A method of for improving leather yield of leather - Google Patents
A method of for improving leather yield of leather Download PDFInfo
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- CN106191336B CN106191336B CN201610687365.5A CN201610687365A CN106191336B CN 106191336 B CN106191336 B CN 106191336B CN 201610687365 A CN201610687365 A CN 201610687365A CN 106191336 B CN106191336 B CN 106191336B
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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 methods for improving leather yield of leather, including softening raw material, restores fresh hide state, remove unwanted ingredient in fur processing, after complete thick graywall is separated head layer and two layers by split process, two layers of graywalls investment tanning drum carry out delimings, softening, pickling；Then glutaraldehyde tanning agent 5% is added and rotates 180min in rotary drum, carries out sufficient permeable reactive, until the appearance of the skin heart is light yellow；Water 200% is added, controlled at 45 DEG C；Rewetting agent 0.2% is added, rotates 60min, then water is discharged；Water 150% is continuously added, controlled at 45 DEG C；Sodium formate 2% is added；Sodium bicarbonate 0.3% is added, rotates 30min, controls pH value between 5.4 ± 0.1；Acid protease 2.5% is added, rotates 120min, then water is discharged；It is mixed again technique；Household leather is dyed；Carry out emulsion oil-filling.
Description
Technical field
The present invention relates to a kind of manufacturing methods more particularly to a kind of for improving the side of leather yield of leather of household leather
Method.
Background technique
In the epoch that this increasingly focuses on ecology, environmental protection, leather industry will be faced with formidable challenges, at home leather industry
Actively carry out the certification of corium mark Ecology Leather, it is specified that the content of relevant chemical substance that may be present is necessary in Ecology Leather
It is strict controlled in limitation range.
Yield of leather is always to be related to the problem of whether company gets a profit in existing household leather, and most of factories formulate not yet
A set of scheme that yield of leather is improved for oneself factory's leather out, or there are technical deficiency, fall flat.
Summary of the invention
It is an object of the invention to overcome the above deficiencies in the existing technologies, and one kind is provided and is obtained for improving leather
The method of leather rate.
Technical solution used by the present invention solves the above problems is:
A method of for improving leather yield of leather, comprising the following steps:
(1) raw material is softened, restores fresh hide state, remove unwanted ingredient in fur processing, passed through in complete thick graywall
For split process by after head layer and two layers of separation, two layers of graywall investment tanning drum carry out deliming, softening, pickling；Then it is added penta
Two aldehyde tanning agents 5% rotate 180min in rotary drum, carry out sufficient permeable reactive, until the appearance of the skin heart is light yellow；
(2) water 200% is added, controlled at 45 DEG C；
(3) rewetting agent 0.2% is added, rotates 60min, then water is discharged；
(4) water 150% is continuously added, controlled at 45 DEG C；
(5) sodium formate 2% is added；
(6) sodium bicarbonate 0.3% is added, rotates 30min, controls pH value between 5.4 ± 0.1；
(7) acid protease 2.5% is added, rotates 120min, then water is discharged；
(8) it is mixed again technique；
(9) household leather is dyed；
(10) emulsion oil-filling is carried out；
Above each percentage is the weight percent that each ingredient accounts for skin.
The retanning process the following steps are included:
(1) be added 100% water put into rotary drum of mixing again, controlled at 35 DEG C, control pH value 5.1 ± 0.1 it
Between；
(2) fatting agent 1% is added and rotates 15min；
(3) infiltration of acrylic acid double tanning agent 3% is added to mix again 45 minutes；
(4) fatting agent 2%, dispersing agent 1%, vegetable tanning agent 5% is added, mix 30min again；Fatting agent 2%, alternative is added
Syntans 4%, vegetable tanning agent 5% are mixed 30min again；
(5) dyestuff penetration is added and reacts 60min, until dyeing the saturating heart；
(6) 80% water is added, controlled at 48-50 DEG C；
(7) fatting agent 6%, polymeric type retanning agent 2% is added, mixes again 45 minutes；
(8) mould inhibitor 0.2% is added to rotate 30 minutes；
(9) formic acid 1.2% is added in two portions, rotates 30min respectively, adjusts pH value between 3.6 ± 0.1；
(10) washing goes out to rouse three times；
Above each percentage is the weight percent that each ingredient accounts for skin.
Compared with prior art, the present invention having the following advantages that and effect: acid protease is added in return water process, this
Class product can soften the grain of leather, remove hide fiber interstitial, loose hide fiber.Make grain side of leather clear, overall leveling,
Evenness is good, removes wrinkle, to increase area yield of leather.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in the embodiment of the present invention
Technical solution is clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than complete
The embodiment in portion.
A kind of method for improving leather yield of leather of the invention is as follows:
A method of for improving leather yield of leather, comprising the following steps:
(1) raw material is softened, restores fresh hide state, remove unwanted ingredient in fur processing, passed through in complete thick graywall
For split process by after head layer and two layers of separation, two layers of graywall investment tanning drum carry out deliming, softening, pickling；Then it is added penta
Two aldehyde tanning agents 5% rotate 180min in rotary drum, carry out sufficient permeable reactive, until the appearance of the skin heart is light yellow；
(2) water 200% is added, controlled at 45 DEG C；
(3) rewetting agent 0.2% is added, rotates 60min, then water is discharged；
(4) water 150% is continuously added, controlled at 45 DEG C；
(5) sodium formate 2% is added；
(6) sodium bicarbonate 0.3% is added, rotates 30min, controls pH value between 5.4 ± 0.1；
(7) acid protease 2.5% is added, rotates 120min, then water is discharged；
(8) it is mixed again technique；
(9) household leather is dyed；
(10) emulsion oil-filling is carried out；
Above each percentage is the weight percent that each ingredient accounts for skin.
The retanning process the following steps are included:
(1) be added 100% water put into rotary drum of mixing again, controlled at 35 DEG C, control pH value 5.1 ± 0.1 it
Between；
(2) fatting agent 1% is added and rotates 15min；
(3) infiltration of acrylic acid double tanning agent 3% is added to mix again 45 minutes；
(4) fatting agent 2%, dispersing agent 1%, vegetable tanning agent 5% is added, mix 30min again；Fatting agent 2%, alternative is added
Syntans 4%, vegetable tanning agent 5% are mixed 30min again；
(5) dyestuff penetration is added and reacts 60min, until dyeing the saturating heart；
(6) 80% water is added, controlled at 48-50 DEG C；
(7) fatting agent 6%, polymeric type retanning agent 2% is added, mixes again 45 minutes；
(8) mould inhibitor 0.2% is added to rotate 30 minutes；
(9) formic acid 1.2% is added in two portions, rotates 30min respectively, adjusts pH value between 3.6 ± 0.1；
(10) washing goes out to rouse three times；
Above each percentage is the weight percent that each ingredient accounts for skin.
Household removes from office retanning after shaving.It not only acts as filling effect, moreover it is possible to which it is equal to be conducive to dyestuff for the surface charge for changing leather
The uniformly penetrating of even coloring and fatting agent, the leather lovely luster and leather body after making dyeing are plentiful., grain surface disability close to leather body compared with
Few chrome tanning upper shoes leather can use inorganic tanning agent, syntans retanning, keep finished leather more plentiful, soft.Aniline leather or semibenzene
Amine removes from office usable resins tanning agent or syntans retanning.Modification upper leather can carry out the retanning of appropriateness with syntans, vegetable tanning agent.
Hereafter, household is removed from office and carries out dyeing process.Light leather requires to dye after tanning, to improve the use value of leather.
The capital equipment of dip dyeing is rotary drum.The mechanism of rotary drum can accelerate the infiltration of dyestuff, make even dyeing, while can also be same
Emulsion oil-filling is carried out in one rotary drum.The colouring method of light leather has dip dyeing, brush dye and spray-painting etc..
Brush dye is the dye liquor brush that dissolve to dry dry dyestuff in the process gradually by grain in extension on the surface of wet leather in advance
It absorbs and colours.Brush dye can save dyestuff, but work efficiency is low, easily causes color difference and dyeing defect, therefore be not widely adopted.
Spray-painting is to spray dyestuff on dyed leather, further cover grain defect, make grain coloring more uniformly,
It is full, and improve tone, enhance dyeing effect.It is wet leather can also the direct spray-painting without dip dyeing, with adapt to small lot production and color
The variation in pool.Modern spray-painting generally uses premetallized dye, keeps grain tone plentiful, also can produce different colour effects.
Fat liquored process is finally carried out, tanned wet leather is such as without oiling, and fiber can be mutual in leather after drying
Bonding reduces the lubricity between fiber, causes finished leather stiff.Oiling can make leather softness, resistance to complications, and amount of grease can also play
Slight supplement tanning effect, enhances the toughness of leather.It refuels and generally uses the lotion of oil-in-water type, hygrometric state carries out in leather.Chromium
Tan upper shoes leather adds suitable cationic fat liquor, again preferably after anionic emulsion refuels to increase the grease knot of grain layer
Resultant facilitates pasting board or the vacuum drying in later period.
Influence in the present invention to the state that acidic protein enzyme dosage how many pairs of scytoblastema yield of leathers and scytoblastema is added carries out
Experiment, as shown in the table:
| Acidic protein enzyme dosage/% | Scytoblastema state | Scytoblastema yield of leather |
| 0 | Loose side, grain be not tight, buttocks is stiff | 99.5 |
| 1.5 | Loose side, grain be not flexible, buttocks shows slightly stiff | 101.6 |
| 2.5 | Soft, whole good evenness, buttocks be not stiff | 103.2 |
| 3.5 | Soft, side abdomen loose side | 104.5 |
From upper table it is recognised that when using acid protease for 2.5%, the state of scytoblastema be it is soft, whole
Evenness is good, buttocks is not stiff, and yield of leather is 103.2.Compared to the dosage of other acid proteases, shown by 2.5%
As a result best.
Above content is only to the invention patent example explanation described in this specification.Belonging to the present invention
Those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitutes, content without departing from description of the invention or beyond the scope defined by this claim, should all belong to
In protection scope of the present invention.
Claims (1)
1. a kind of method for improving leather yield of leather, comprising the following steps:
(1) raw material is softened, restores fresh hide state, remove unwanted ingredient in fur processing, pass through split in complete thick graywall
For process by after head layer and two layers of separation, two layers of graywall investment tanning drum carry out deliming, softening, pickling；Then glutaraldehyde is added
Tanning agent 5% rotates 180min in rotary drum, carries out sufficient permeable reactive, until the appearance of the skin heart is light yellow；
(2) water 200% is added, controlled at 45 DEG C；
(3) rewetting agent 0.2% is added, rotates 60min, then water is discharged；
(4) water 150% is continuously added, controlled at 45 DEG C；
(5) sodium formate 2% is added；
(6) sodium bicarbonate 0.3% is added, rotates 30min, controls pH value between 5.4 ± 0.1；
(7) acid protease 2.5% is added, rotates 120min, then water is discharged；
(8) it is mixed again technique；
(9) household leather is dyed；
(10) emulsion oil-filling is carried out；
The retanning process the following steps are included:
(1) water for being added 100% is put into rotary drum of mixing again, controlled at 35 DEG C, controls pH value between 5.1 ± 0.1；
(2) fatting agent 1% is added and rotates 15min；
(3) infiltration of acrylic acid double tanning agent 3% is added to mix again 45 minutes；
(4) fatting agent 2%, dispersing agent 1%, vegetable tanning agent 5% is added, mix 30min again；Fatting agent 2%, alternative syntans is added
4%, vegetable tanning agent 5% is mixed 30min again；
(5) dyestuff penetration is added and reacts 60min, until dyeing the saturating heart；
(6) 80% water is added, controlled at 48-50 DEG C；
(7) fatting agent 6%, polymeric type retanning agent 2% is added, mixes again 45 minutes；
(8) mould inhibitor 0.2% is added to rotate 30 minutes；
(9) formic acid 1.2% is added in two portions, rotates 30min respectively, adjusts pH value between 3.6 ± 0.1；
(10) washing goes out to rouse three times；
Further include the steps that emulsion oil-filling after the step (10) washing goes out drum three times, emulsion oil-filling is using oil-in-water type
Lotion, hygrometric state carries out in leather；
Above each percentage is the weight percent that each ingredient accounts for 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 CN106191336A (en) | 2016-12-07 |
| CN106191336B true 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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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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 |
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- 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 |
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| CN106191336A (en) | 2016-12-07 |
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