CN108950101A - A kind of automobile skin alkali sulfide free deliming processing method - Google Patents
A kind of automobile skin alkali sulfide free deliming processing method Download PDFInfo
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- CN108950101A CN108950101A CN201810314815.5A CN201810314815A CN108950101A CN 108950101 A CN108950101 A CN 108950101A CN 201810314815 A CN201810314815 A CN 201810314815A CN 108950101 A CN108950101 A CN 108950101A
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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
- C14C1/00—Chemical treatment prior to tanning
- C14C1/04—Soaking
-
- 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
- C14C1/06—Facilitating unhairing, e.g. by painting, by liming
- C14C1/065—Enzymatic unhairing
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention discloses a kind of automobile skin alkali sulfide free deliming processing method, include the following steps: that A is pre-processed；B immersion: with depilation enzyme pretreatment 1 hour of 0.3%-0.6%；C depilation: being added depilation/liming agent of 1%-2% and depilation/fiber dispersing aid of 0.5%-1%, expand raw material with the sodium hydroxide of 1.5%-2.5%, and the ashless dispersing agent for fibre of 0.5%-1% is added, and rotates 30min, then water is discharged；D washing；E deliming: being added degreasing agent 0.2%-0.5% and deliming without ammonium agent 1.2%-2%, rotates 50min；F: softening；G pickling；H tanning: being added high-selenium corn chromium and rub auxiliary agent, and dosage is the 10-15% of chromium powder, rotates 30min.After automobile skin alkali sulfide free deliming processing method processing through the invention, the content of the major pollutants in waste liquid is substantially reduced.
Description
Technical field
The present invention relates to a kind of production method of leather more particularly to a kind of automobile skin alkali sulfide free deliming processing sides
Method.
Background technique
In existing leather treatment process, include the following steps: in de-ash process
(1) water 120% is added, controlled at 45 DEG C；
(2) sodium pyrosulfite 0.4% and deliming agent 0.6% is added, rotates 30min, then water is discharged；
(3) water 150% is continuously added, controlled at 31 ± 1 DEG C, 15min is rotated, then water is discharged；
(4) degreasing agent 0.3% and deliming agent 1.1% is added, rotates 50min；
(5) pH value is detected, controls pH value between 8.0 ± 0.2；
(6) the whether saturating heart of deliming is manually checked, checks that notch phenolphthalein reagent is colourless；
The sodium pyrosulfite and deliming agent used in above-mentioned steps, when using sodium pyrosulfite and deliming agent, material is used
Amount is big, and waste liquid can generate COD, sulfide, lime and ammonia nitrogen etc., and above-mentioned waste liquid is difficult to handle, and bring serious dirt to environment
Dye.
In existing leather treatment process, process for tanning the following steps are included:
(1) industrial refined salt 3% is added；
(2) pre- fatting agent 0.4% is added, melts pre- fatting agent according to 1:3 warm water before addition, rotates 20min；
(3) pretanning agent 1.5% is added, rotates 30min；
(4) the fur sulfuric acid 0.4% of purity 98% is added, by fur sulfuric acid according to 1:10 cold water dilutionization before addition
It opens, rotates 20min；
(5) the fur sulfuric acid 0.4% of purity 98% is added, by fur sulfuric acid according to 1:10 cold water dilutionization before addition
It opens, rotates 60min, suspend 10min after every rotation 20min；
(6) chrome tanning agent 1.5% is added, rotates 30min；
(7) chrome tanning agent 1.5% is added, rotates 150min；
(8) sodium formate 0.5% of purity 96% is added, rotates 30min；
(9) it is added and mentions alkaline agent 0.25%, rotate 180min；
(10) water 50% is continuously added, controlled at 35 ± 3 DEG C；
(11) it is added and mentions alkaline agent 0.05%, alkaline agent will be mentioned before addition and is melted according to the dilution of 1:10 warm water；
(12) syntans 4% is added, rotates 150min；
(13) water 150% is continuously added, controlled at 33 ± 3 DEG C；
(14) degreasing agent 0.2% is added, rotates 15min；
Need to be added a large amount of chromium powder in above-mentioned steps, chromium from waste chromium content is high, pollutes the environment, and chromium powder dosage
When big, material cost is also increase accordingly, and in addition during pickling, the dosage of salt and acid is larger, and the pollution of waste liquid salt is larger.
Summary of the invention
The purpose of the present invention is to provide a kind of automobile skin alkali sulfide free deliming processing methods, using processing side of the invention
Method can reach no sulphur, ashless deliming and fiber dispersion effect, effectively reduce the pollutant in waste liquid, can reduce chromium powder, salt and
The dosage of acid reduces tanning cost, while reducing the pollutant in waste liquid.
Technical solution used by the present invention solves the above problems is:
A kind of automobile skin alkali sulfide free deliming processing method, includes the following steps:
A pretreatment: raw material is softened, and restores fresh hide state, removes unwanted ingredient in fur processing；
B immersion: be added water, control temperature, with depilation enzyme pretreatment 1 hour of 0.3%-0.6%, make hair root, epidermis and
Scurf loosens, and disperses collagenous fibres, and controlling pH value is 7.5-9.5；
C depilation: depilation/liming agent of 1%-2% and depilation/fiber dispersing aid of 0.5%-1% is added, uses 1.5%-
2.5% sodium hydroxide expands raw material, and the ashless dispersing agent for fibre of 0.5%-1% is added, and rotates 30min, then arranges water
Out；
D washing: adding water to clean, and makes surface cleaning without dirt；
E deliming:
(1) degreasing agent 0.2%-0.5% and deliming without ammonium agent 1.2%-2% is added, rotates 50min；
(2) pH value is detected, controls pH value between 8.0 ± 0.2；
(3) the whether saturating heart of deliming is manually checked, checks that notch phenolphthalein reagent is colourless；
F: softening:
(1) macerating enzyme 0.4%-0.6% is added, rotates 40min, suspends 10min after every rotation 20min；
(2) pH value and temperature are detected, pH value is controlled between 8.0 ± 0.2, controls 31 ± 1 DEG C of temperature；
(3) manual inspection whether soften, buttocks bubble whether homogeneous soft, then water is discharged；
(4) plus water, control temperature, flowing water are washed, and the control time is 30-40min, and then water 50% is discharged；
(5) pH value is detected, controls pH value between 7.5 ± 0.5；
(6) add water 50%, control temperature；
G pickling:
(1) industrial refined salt 1.5%-2% is added, detection Baume degrees is 6.0 ± 0.5；
(2) pre- fatting agent 0.3%-0.5% is added, melts pre- fatting agent according to 1:3 warm water before addition, rotates 20min；
(3) salt-free pickling pretanning agent 1%-2% is added, rotates 30min；
(4) formic acid of 0.2%-0.5% and the 1%-2% chromium high-selenium corn auxiliary pickling agent of raw material is added, at least rotates
Chromium powder is added after 120min；
(5) the fur sulfuric acid 0.2% of purity 98% is added, by fur sulfuric acid according to 1:10 cold water dilutionization before addition
It opens, rotates 20min；
(6) the fur sulfuric acid 0.2% of purity 98% is added, by fur sulfuric acid according to 1:10 cold water dilutionization before addition
It opens, rotates 60min, suspend 10min after every rotation 20min；
(7) pH value, temperature and Baume degrees are detected, controls pH value between 2.8-3.2, controls 24 ± 3 DEG C of temperature, control
Baume degrees is 6.0 ± 0.5；
(8) artificial pickling checks the saturating heart, and notch bromocresol green inspection shows full yellow；
H tanning:
(1) high-selenium corn chromium is added and rubs auxiliary agent, dosage is the 10-15% of chromium powder, rotates 30min；
(2) sodium formate 0.5% of purity 96% is added, rotates 30min；
(3) it is added and mentions alkaline agent 0.25%, rotate 180min；
(4) pH value, temperature are detected, pH value is controlled between 3.9-4.3, controls temperature；
(5) water 50% is continuously added；
(6) it is added and mentions alkaline agent 0.05%, alkaline agent will be mentioned before addition and is melted according to the dilution of 1:10 warm water；
(7) syntans 4% is added, rotates 150min；
(8) water is continuously added, temperature is controlled；
(9) degreasing agent 0.2% is added, rotates 15min；
(10) pH value, temperature are detected, pH value is controlled between 4.0-4.4, controls 30 ± 3 DEG C of temperature；
(11) 30 ± 3 DEG C of temperature are controlled to go out to rouse；
What above each percentage did not indicated further is the weight percent that each ingredient accounts for skin.
In the immersion step when depilation enzyme is added, while preservative is added, to avoid bacterium to skin in the present invention
Grain causes to damage.
Depilation enzyme in A pre-treatment step of the present invention is using Da Weilong UHE depilation enzyme preparation.
Depilation/liming agent in C epilation step of the present invention is using Da Weilong UHA depilation/liming agent, depilation/fiber
Dispersing aid using Da Weilong UHB depilation/fiber dispersing aid, ashless dispersing agent for fibre using Da Weilong OPF without
Gray fibers dispersing agent.
Deliming without ammonium agent in E deliming steps of the present invention is using reaching power card DLA deliming without ammonium agent.
Chromium high-selenium corn auxiliary pickling agent in G acid soaking step of the present invention is helped using Da Weilong PCA chromium high-selenium corn pickling
Agent.
High-selenium corn chromium in H tanning step of the present invention rubs auxiliary agent, rubs auxiliary agent using Da Weilong CHE high-selenium corn chromium.
Compared with prior art, the present invention having following technical effect that
After automobile skin alkali sulfide free deliming processing method processing through the invention, the content of the major pollutants in waste liquid
It is substantially reduced.
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.
Embodiment 1
A kind of automobile skin alkali sulfide free deliming processing method, includes the following steps:
A pretreatment: raw material is softened, and restores fresh hide state, removes unwanted ingredient in fur processing；
B immersion: water 120%, which is added, controlled at 45 DEG C, with depilation enzyme pretreatment 1 hour of 0.3%, makes hair root, table
Skin and scurf loosen, and disperse collagenous fibres, and controlling pH value is 7.5-9.5；
C depilation: 1% depilation/liming agent and 0.5% depilation/fiber dispersing aid is added, with 1.5% hydroxide
Sodium expands raw material, and 0.5% ashless dispersing agent for fibre is added, and rotates 30min, then water is discharged；
D washing: being added water 150%, controlled at 31 ± 1 DEG C, rotates 15min, then water is discharged；Continuously add water
80%, controlled at 31 ± 1 DEG C, make surface cleaning without dirt；
E deliming:
(1) degreasing agent 0.2% and deliming without ammonium agent 1.2% is added, rotates 50min；
(2) pH value is detected, controls pH value between 8.0 ± 0.2；
(3) the whether saturating heart of deliming is manually checked, checks that notch phenolphthalein reagent is colourless；
F: softening:
(1) macerating enzyme 0.4% is added, rotates 40min, suspends 10min after every rotation 20min；
(2) pH value and temperature are detected, pH value is controlled between 8.0 ± 0.2, controls 31 ± 1 DEG C of temperature；
(3) manual inspection whether soften, buttocks bubble whether homogeneous soft, then water is discharged；
(4) add water 400%, controlled at 18 ± 5 DEG C, flowing water washing, the control time is 30-40min, then by water
50% discharge；
(5) pH value is detected, controls pH value between 7.5 ± 0.5；
(6) add water 50%, controlled at 18 ± 5 DEG C, winter, summer was close to lower limit value close to upper limit value；
G pickling:
(1) industrial refined salt 1.5% is added, detection Baume degrees is 6.0 ± 0.5；
(2) pre- fatting agent 0.3% is added, melts pre- fatting agent according to 1:3 warm water before addition, rotates 20min；
(3) salt-free pickling pretanning agent 1% is added, rotates 30min；
(4) 0.2% formic acid and 1% chromium high-selenium corn auxiliary pickling agent of raw material is added, chromium is added after at least rotation 120min
Powder；
(5) the fur sulfuric acid 0.2% of purity 98% is added, by fur sulfuric acid according to 1:10 cold water dilutionization before addition
It opens, rotates 20min；
(6) the fur sulfuric acid 0.2% of purity 98% is added, by fur sulfuric acid according to 1:10 cold water dilutionization before addition
It opens, rotates 60min, suspend 10min after every rotation 20min；
(7) pH value, temperature and Baume degrees are detected, controls pH value between 2.8-3.2, controls 24 ± 3 DEG C of temperature, control
Baume degrees is 6.0 ± 0.5；
(8) artificial pickling checks the saturating heart, and notch bromocresol green inspection shows full yellow；
H tanning:
(1) high-selenium corn chromium is added and rubs auxiliary agent, dosage is the 10% of chromium powder, rotates 30min；
(2) sodium formate 0.5% of purity 96% is added, rotates 30min；
(3) it is added and mentions alkaline agent 0.25%, rotate 180min；
(4) pH value, temperature are detected, pH value is controlled between 3.9-4.3, controls 37 ± 3 DEG C of temperature；
(5) water 50% is continuously added, controlled at 35 ± 3 DEG C；
(6) it is added and mentions alkaline agent 0.05%, alkaline agent will be mentioned before addition and is melted according to the dilution of 1:10 warm water；
(7) syntans 4% is added, rotates 150min；
(8) water 150% is continuously added, controlled at 33 ± 3 DEG C；
(9) degreasing agent 0.2% is added, rotates 15min；
(10) pH value, temperature are detected, pH value is controlled between 4.0-4.4, controls 30 ± 3 DEG C of temperature；
(11) 30 ± 3 DEG C of temperature are controlled to go out to rouse；
What above each percentage did not indicated further is the weight percent that each ingredient accounts for skin.
In the immersion step when depilation enzyme is added, while preservative is added, to avoid bacterium to skin in the present invention
Grain causes to damage.
Embodiment 2
A kind of automobile skin alkali sulfide free deliming processing method, includes the following steps:
A pretreatment: raw material is softened, and restores fresh hide state, removes unwanted ingredient in fur processing；
B immersion: water 120%, which is added, controlled at 45 DEG C, with depilation enzyme pretreatment 1 hour of 0.4%, makes hair root, table
Skin and scurf loosen, and disperse collagenous fibres, and controlling pH value is 7.5-9.5；
C depilation: 1.5% depilation/liming agent and 0.8% depilation/fiber dispersing aid is added, with 2% hydroxide
Sodium expands raw material, and 0.7% ashless dispersing agent for fibre is added, and rotates 30min, then water is discharged；
D washing: being added water 150%, controlled at 31 ± 1 DEG C, rotates 15min, then water is discharged；Continuously add water
80%, controlled at 31 ± 1 DEG C, make surface cleaning without dirt；
E deliming:
(1) degreasing agent 0.4% and deliming without ammonium agent 1.6% is added, rotates 50min；
(2) pH value is detected, controls pH value between 8.0 ± 0.2；
(3) the whether saturating heart of deliming is manually checked, checks that notch phenolphthalein reagent is colourless；
F: softening:
(1) macerating enzyme 0.4%-0.6% is added, rotates 40min, suspends 10min after every rotation 20min；
(2) pH value and temperature are detected, pH value is controlled between 8.0 ± 0.2, controls 31 ± 1 DEG C of temperature；
(3) manual inspection whether soften, buttocks bubble whether homogeneous soft, then water is discharged；
(4) add water 400%, controlled at 18 ± 5 DEG C, flowing water washing, the control time is 30-40min, then by water
50% discharge；
(5) pH value is detected, controls pH value between 7.5 ± 0.5；
(6) add water 50%, controlled at 18 ± 5 DEG C, winter, summer was close to lower limit value close to upper limit value；
G pickling:
(1) industrial refined salt 1.8% is added, detection Baume degrees is 6.0 ± 0.5；
(2) pre- fatting agent 0.4% is added, melts pre- fatting agent according to 1:3 warm water before addition, rotates 20min；
(3) salt-free pickling pretanning agent 1.6% is added, rotates 30min；
(4) 0.3% formic acid and 1.4% chromium high-selenium corn auxiliary pickling agent of raw material is added, is added after at least rotation 120min
Chromium powder；
(5) the fur sulfuric acid 0.2% of purity 98% is added, by fur sulfuric acid according to 1:10 cold water dilutionization before addition
It opens, rotates 20min；
(6) the fur sulfuric acid 0.2% of purity 98% is added, by fur sulfuric acid according to 1:10 cold water dilutionization before addition
It opens, rotates 60min, suspend 10min after every rotation 20min；
(7) pH value, temperature and Baume degrees are detected, controls pH value between 2.8-3.2, controls 24 ± 3 DEG C of temperature, control
Baume degrees is 6.0 ± 0.5；
(8) artificial pickling checks the saturating heart, and notch bromocresol green inspection shows full yellow；
H tanning:
(1) high-selenium corn chromium is added and rubs auxiliary agent, dosage is the 10-15% of chromium powder, rotates 30min；
(2) sodium formate 0.5% of purity 96% is added, rotates 30min；
(3) it is added and mentions alkaline agent 0.25%, rotate 180min；
(4) pH value, temperature are detected, pH value is controlled between 3.9-4.3, controls 37 ± 3 DEG C of temperature；
(5) water 50% is continuously added, controlled at 35 ± 3 DEG C；
(6) it is added and mentions alkaline agent 0.05%, alkaline agent will be mentioned before addition and is melted according to the dilution of 1:10 warm water；
(7) syntans 4% is added, rotates 150min；
(8) water 150% is continuously added, controlled at 33 ± 3 DEG C；
(9) degreasing agent 0.2% is added, rotates 15min；
(10) pH value, temperature are detected, pH value is controlled between 4.0-4.4, controls 30 ± 3 DEG C of temperature；
(11) 30 ± 3 DEG C of temperature are controlled to go out to rouse；
What above each percentage did not indicated further is the weight percent that each ingredient accounts for skin.
In the immersion step when depilation enzyme is added, while preservative is added, to avoid bacterium to skin in the present invention
Grain causes to damage.
Embodiment 3
A kind of automobile skin alkali sulfide free deliming processing method, includes the following steps:
A pretreatment: raw material is softened, and restores fresh hide state, removes unwanted ingredient in fur processing；
B immersion: water 120%, which is added, controlled at 45 DEG C, with depilation enzyme pretreatment 1 hour of 0.6%, makes hair root, table
Skin and scurf loosen, and disperse collagenous fibres, and controlling pH value is 7.5-9.5；
C depilation: 2% depilation/liming agent and 1% depilation/fiber dispersing aid is added, with 2.5% sodium hydroxide
Raw material is expanded, 1% ashless dispersing agent for fibre is added, 30min is rotated, then water is discharged；
D washing: being added water 150%, controlled at 31 ± 1 DEG C, rotates 15min, then water is discharged；Continuously add water
80%, controlled at 31 ± 1 DEG C, make surface cleaning without dirt；
E deliming:
(1) degreasing agent 0.5% and deliming without ammonium agent 2% is added, rotates 50min；
(2) pH value is detected, controls pH value between 8.0 ± 0.2；
(3) the whether saturating heart of deliming is manually checked, checks that notch phenolphthalein reagent is colourless；
F: softening:
(1) macerating enzyme 0.6% is added, rotates 40min, suspends 10min after every rotation 20min；
(2) pH value and temperature are detected, pH value is controlled between 8.0 ± 0.2, controls 31 ± 1 DEG C of temperature；
(3) manual inspection whether soften, buttocks bubble whether homogeneous soft, then water is discharged；
(4) add water 400%, controlled at 18 ± 5 DEG C, flowing water washing, the control time is 30-40min, then by water
50% discharge；
(5) pH value is detected, controls pH value between 7.5 ± 0.5；
(6) add water 50%, controlled at 18 ± 5 DEG C, winter, summer was close to lower limit value close to upper limit value；
G pickling:
(1) industrial refined salt 2% is added, detection Baume degrees is 6.0 ± 0.5；
(2) pre- fatting agent 0.5% is added, melts pre- fatting agent according to 1:3 warm water before addition, rotates 20min；
(3) salt-free pickling pretanning agent 2% is added, rotates 30min；
(4) 0.5% formic acid and 2% chromium high-selenium corn auxiliary pickling agent of raw material is added, chromium is added after at least rotation 120min
Powder；
(5) the fur sulfuric acid 0.2% of purity 98% is added, by fur sulfuric acid according to 1:10 cold water dilutionization before addition
It opens, rotates 20min；
(6) the fur sulfuric acid 0.2% of purity 98% is added, by fur sulfuric acid according to 1:10 cold water dilutionization before addition
It opens, rotates 60min, suspend 10min after every rotation 20min；
(7) pH value, temperature and Baume degrees are detected, controls pH value between 2.8-3.2, controls 24 ± 3 DEG C of temperature, control
Baume degrees is 6.0 ± 0.5；
(8) artificial pickling checks the saturating heart, and notch bromocresol green inspection shows full yellow；
H tanning:
(1) high-selenium corn chromium is added and rubs auxiliary agent, dosage is the 10-15% of chromium powder, rotates 30min；
(2) sodium formate 0.5% of purity 96% is added, rotates 30min；
(3) it is added and mentions alkaline agent 0.25%, rotate 180min；
(4) pH value, temperature are detected, pH value is controlled between 3.9-4.3, controls 37 ± 3 DEG C of temperature；
(5) water 50% is continuously added, controlled at 35 ± 3 DEG C；
(6) it is added and mentions alkaline agent 0.05%, alkaline agent will be mentioned before addition and is melted according to the dilution of 1:10 warm water；
(7) syntans 4% is added, rotates 150min；
(8) water 150% is continuously added, controlled at 33 ± 3 DEG C；
(9) degreasing agent 0.2% is added, rotates 15min；
(10) pH value, temperature are detected, pH value is controlled between 4.0-4.4, controls 30 ± 3 DEG C of temperature；
(11) 30 ± 3 DEG C of temperature are controlled to go out to rouse；
What above each percentage did not indicated further is the weight percent that each ingredient accounts for skin.
In the immersion step when depilation enzyme is added, while preservative is added, to avoid bacterium to skin in the present invention
Grain causes to damage.
Comparative experiments 1:
Through the foregoing embodiment with the comparison of traditional handicraft, main dirt after processing method of the invention, in waste liquid
The content of dye object is substantially reduced.
Comparative experiments 2:
By upper table it is found that the leather property of the technical solution adopted by the present invention generation is superior, meet the requirements.
After the present invention improves processing method, the absorptivity of other materials can be improved to save chemical materials and reduce leather dirt
Dye is suitable for environmental requirement, increases economic benefit, in leather industry production, this method will increasingly play important work
With.
Depilation/liming agent in the present invention is Da Weilong UHA depilation/liming agent, is free of vulcanized sodium, acts on hair
Soft keratin, can loosen and remove hair root, epidermis and scurf, therefore can replace original sulfide, due to its not sulfur compound,
Sulphion will not be discharged into waste liquid, can substantially reduce the pollutant load in waste liquid.In depilation operation, it can obviously inhibit skin
Excessively expansion obtains skin uniformly and the expansion of appropriateness, reduces " bonding " between hide fiber, promote the infiltration of limiting material,
To protect grain, the fertilizer wrinkle and neck line of graywall effectively can be eliminated or be reduced, smooth, clean pelt is obtained, glue can be promoted
Loose, improvement finished leather softness and the fullness of fibrinogen, increase yield of leather.
Depilation/dispersing aid in the present invention is Da Weilong UHB depilation/fiber dispersing aid, it acts as: can loosen and
Hair root, epidermis and scurf are removed, and there is preferable peptizaiton to collagenous fibres, which can replace sulfide and lime,
Depilation and fiber dispersion step for cleaning；With the apparent performance for inhibiting skin excessively to expand, make skin obtain uniformly and
The expansion of appropriateness, promotes the infiltration of limiting material；The fertilizer wrinkle and neck line that effectively can eliminate or reduce graywall, obtain smooth, clean
Net pelt；It can promote the loose of collagenous fibres, improve finished leather softness and fullness, increase yield of leather.
Depilation enzyme in the present invention is Da Weilong UHE depilation enzyme preparation, can loosen hair root, epidermis and scurf, and to collagen
Fiber has preferable peptizaiton.
Ashless dispersing agent for fibre in the present invention is that the ashless dispersing agent for fibre of Da Weilong OPF under alkaline condition can be effective
Destroy interfibrillar substance and reduce " bonding " between hide fiber, thus to collagenous fibres with relatively good peptizaiton.
In immersion and epilation step, above-mentioned auxiliary agent is used cooperatively, and can reach entirely without sulphur, ashless depilation and fiber
Dispersion effect.
The pre- fatting agent of CRC that pre- fatting agent in the present invention is Da Weile, chemical component are phosphatization grease, contain spy
Different emulsifier, thus have the following characteristics that can accelerate pickling, tanning during material infiltration；With good exhaustion rate, no
Easily extracted from leather；With high resiliency grain and outstanding pliability；With outstanding light resistance, heat-resisting xanthochromia shape.
Macerating enzyme in the present invention is specially Da Weizimu CBK ox-hide macerating enzyme, product characteristic are as follows: emollescence is deep
Enter, uniformly, stablize, can leniently loose hide fiber, not will cause the grain damage of scytoblastema；Can improve finished leather pliability,
The flat fineness of grain, reduction position is poor, increases area yield of leather；The growth trace excellent for eliminating skin, it is obvious to open line effect；It can
Loose scurf removes depigmentation, keeps pelt relatively white.
Degreasing agent in the present invention is alkaline defatting agent in the prior art, and details are not described herein again.
Deliming without ammonium agent in the present invention is up to Willie card DLA without ammonia deliming agent, and ammonium salt-containing, is not a kind of clean and environmental protection
Deliming agent, complex soluble easily in water can be formed with calcium ion, thus can completely remove it is intradermal absorption and combination lime, reach
To the effect of efficient deliming, with preferable permeability, graywall deliming after being suitably for split and split can be reduced or eliminated
The danger that the discharge of sulfide and hydrogen sulfide gas generate in deliming liquid.
Salt-free pickling pretanning agent in the present invention is specifically the salt-free auxiliary pickling agent of Da Weilong FSP, is a kind of modified phenol sulfonic acid,
It is a kind of unexpansive acid, can further decrease the dosage of salt, mitigates salt pollution；And the absorption of chromium can be helped, permeates and divides
Cloth improves the quality of leather；The wrinkle for facilitating elimination surface, improves the planarization of grain；For no chrome tanning or wet-white leather, use
The product pickling, is conducive to the infiltration of syntans and vegetable tanning agent；In pickling, the loosening of hair can be reduced.
Chromium high-selenium corn auxiliary pickling agent in the present invention is Da Weilong PCA chromium high-selenium corn auxiliary pickling agent, in use, can be reduced salt
With the dosage of acid, mitigate salt pollution, and the absorption, infiltration and distribution of chromium can be helped, the dosage of chromium can be substantially reduced, greatly
Ground reduces the chromium content in waste liquid.Specifically, the salt and sulfuric acid that use are the half of conventional amount used during pickling.
The alkaline agent that mentions in the present invention is that BLANCOROL BA-IN mentions alkaline agent, to the absorption aspects of chromium, mentions alkali than traditional
Agent and to propose alkali method more efficient.
It is that Da Weilong CHE high-selenium corn chromium rubs auxiliary agent that high-selenium corn chromium in the present embodiment, which rubs auxiliary agent, when can improve chromium and rubbing
Absorption, infiltration and the distribution of chromium, substantially reduce chromic oxide content in chromium powder dosage and chrome wastewater.Specifically, using the height
After absorption chromium rubs auxiliary agent, the 20-30% of chromium powder dosage can be saved, the dosage of chromium powder is dosage compared to the prior art herein,
And the dosage that high-selenium corn chromium rubs auxiliary agent is the 10-15% of chromium powder dosage.
Syntans in the present invention uses nonmetallic salt-free pickling pretanning agent, is the prior art, details are not described herein again.
Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts
The all other embodiment obtained, shall fall within the protection scope of the present invention.Although the present invention is illustrated with regard to preferred embodiment
And description can be with it is understood by those skilled in the art that without departing from scope defined by the claims of the present invention
Variations and modifications are carried out to the present invention.
Claims (7)
1. a kind of automobile skin alkali sulfide free deliming processing method, which comprises the steps of:
A pretreatment: raw material is softened, and restores fresh hide state, removes unwanted ingredient in fur processing；
B immersion: being added water, and controlling temperature with depilation enzyme pretreatment 1 hour of 0.3%-0.6% makes hair root, epidermis and scurf
It loosens, and disperses collagenous fibres, and controlling pH value is 7.5-9.5；
C depilation: depilation/liming agent of 1%-2% and depilation/fiber dispersing aid of 0.5%-1% is added, uses 1.5%-
2.5% sodium hydroxide expands raw material, and the ashless dispersing agent for fibre of 0.5%-1% is added, and rotates 30min, then arranges water
Out；
D washing: adding water to clean, and makes surface cleaning without dirt；
E deliming:
(1) degreasing agent 0.2%-0.5% and deliming without ammonium agent 1.2%-2% is added, rotates 50min；
(2) pH value is detected, controls pH value between 8.0 ± 0.2；
(3) the whether saturating heart of deliming is manually checked, checks that notch phenolphthalein reagent is colourless；
F: softening:
(1) macerating enzyme 0.4%-0.6% is added, rotates 40min, suspends 10min after every rotation 20min；
(2) pH value and temperature are detected, pH value is controlled between 8.0 ± 0.2, controls 31 ± 1 DEG C of temperature；
(3) manual inspection whether soften, buttocks bubble whether homogeneous soft, then water is discharged；
(4) plus water, control temperature, flowing water are washed, and the control time is 30-40min, and then water 50% is discharged；
(5) pH value is detected, controls pH value between 7.5 ± 0.5；
(6) add water 50%, control temperature；
G pickling:
(1) industrial refined salt 1.5%-2% is added, detection Baume degrees is 6.0 ± 0.5；
(2) pre- fatting agent 0.3%-0.5% is added, melts pre- fatting agent according to 1:3 warm water before addition, rotates 20min；
(3) salt-free pickling pretanning agent 1%-2% is added, rotates 30min；
(4) formic acid of 0.2%-0.5% and the 1%-2% chromium high-selenium corn auxiliary pickling agent of raw material is added, after at least rotating 120min
Chromium powder is added；
(5) the fur sulfuric acid 0.2% of purity 98% is added, melts fur sulfuric acid according to the dilution of 1:10 cold water before addition,
Rotate 20min；
(6) the fur sulfuric acid 0.2% of purity 98% is added, melts fur sulfuric acid according to the dilution of 1:10 cold water before addition,
60min is rotated, suspends 10min after every rotation 20min；
(7) pH value, temperature and Baume degrees are detected, pH value is controlled between 2.8-3.2, controls 24 ± 3 DEG C of temperature, control Baume
Degree is 6.0 ± 0.5；
(8) artificial pickling checks the saturating heart, and notch bromocresol green inspection shows full yellow；
H tanning:
(1) high-selenium corn chromium is added and rubs auxiliary agent, dosage is the 10-15% of chromium powder, rotates 30min；
(2) sodium formate 0.5% of purity 96% is added, rotates 30min；
(3) it is added and mentions alkaline agent 0.25%, rotate 180min；
(4) pH value, temperature are detected, pH value is controlled between 3.9-4.3, controls temperature；
(5) water 50% is continuously added；
(6) it is added and mentions alkaline agent 0.05%, alkaline agent will be mentioned before addition and is melted according to the dilution of 1:10 warm water；
(7) syntans 4% is added, rotates 150min；
(8) water is continuously added, temperature is controlled；
(9) degreasing agent 0.2% is added, rotates 15min；
(10) pH value, temperature are detected, pH value is controlled between 4.0-4.4, controls 30 ± 3 DEG C of temperature；
(11) 30 ± 3 DEG C of temperature are controlled to go out to rouse；
What above each percentage did not indicated further is the weight percent that each ingredient accounts for skin.
2. a kind of automobile skin alkali sulfide free deliming processing method according to claim 1, which is characterized in that in the leaching
In water step, when depilation enzyme is added, while preservative is added, skin grain is caused to damage to avoid bacterium.
3. a kind of automobile skin alkali sulfide free deliming processing method according to claim 1, which is characterized in that A pretreatment step
Depilation enzyme in rapid is using Da Weilong UHE depilation enzyme preparation.
4. a kind of automobile skin alkali sulfide free deliming processing method according to claim 1, which is characterized in that C epilation step
In depilation/liming agent using Da Weilong UHA depilation/liming agent, depilation/fiber dispersing aid is using Da Weilong
UHB depilation/fiber dispersing aid, ashless dispersing agent for fibre is using the ashless dispersing agent for fibre of Da Weilong OPF.
5. a kind of automobile skin alkali sulfide free deliming processing method according to claim 1, which is characterized in that E deliming steps
In deliming without ammonium agent using reach power card DLA deliming without ammonium agent.
6. a kind of automobile skin alkali sulfide free deliming processing method according to claim 1, which is characterized in that G acid soaking step
In chromium high-selenium corn auxiliary pickling agent, using Da Weilong PCA chromium high-selenium corn auxiliary pickling agent.
7. a kind of automobile skin alkali sulfide free deliming processing method according to claim 1, which is characterized in that H tanning step
In high-selenium corn chromium rub auxiliary agent, rub auxiliary agent using Da Weilong CHE high-selenium corn chromium.
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| CN201810314815.5A CN108950101A (en) | 2018-04-10 | 2018-04-10 | A kind of automobile skin alkali sulfide free deliming processing method |
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| CN201810314815.5A CN108950101A (en) | 2018-04-10 | 2018-04-10 | A kind of automobile skin alkali sulfide free deliming processing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114085933A (en) * | 2021-11-29 | 2022-02-25 | 河北省皮革研究院 | Low-chromium high-absorption tanning method |
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| CN106065422A (en) * | 2016-06-06 | 2016-11-02 | 陕西科技大学 | A kind of synthetic method of little molecule pickling auxiliary tanning agent |
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