CN107739762A - The environmentally friendly preparation technology without ammonia nitrogen double-layer leather - Google Patents
The environmentally friendly preparation technology without ammonia nitrogen double-layer leather Download PDFInfo
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- CN107739762A CN107739762A CN201710983145.1A CN201710983145A CN107739762A CN 107739762 A CN107739762 A CN 107739762A CN 201710983145 A CN201710983145 A CN 201710983145A CN 107739762 A CN107739762 A CN 107739762A
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
- C14B1/00—Manufacture of leather; Machines or devices therefor
- C14B1/02—Fleshing, unhairing, samming, stretching-out, setting-out, shaving, splitting, or skiving skins, hides, or leather
- C14B1/04—Fleshing, unhairing, samming, stretching-out, setting-out, shaving, splitting, or skiving skins, hides, or leather using slicking, scraping, or smoothing-out cylinders or blades fixed on supports, e.g. cylinders, in a plane substantially at right angles to the working surface
- C14B1/10—Fleshing, unhairing, samming, stretching-out, setting-out, shaving, splitting, or skiving skins, hides, or leather using slicking, scraping, or smoothing-out cylinders or blades fixed on supports, e.g. cylinders, in a plane substantially at right angles to the working surface in machines with drums with cylindrical, conical, or similar surfaces for supporting the whole working piece
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
- C14B1/00—Manufacture of leather; Machines or devices therefor
- C14B1/40—Softening or making skins or leather supple, e.g. by staking, boarding, or crippling machines, by dry mills
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
- C14B1/00—Manufacture of leather; Machines or devices therefor
- C14B1/58—Drying
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
- C14B17/00—Details of apparatus or machines for manufacturing or treating skins, hides, leather, or furs
- C14B17/14—Auxiliary devices for leather-working machines, e.g. grinding devices for blading cylinders or dust-removal devices combined with the working machines
-
- 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
- C14C11/00—Surface finishing of leather
-
- 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
- C14C15/00—Apparatus for chemical treatment or washing of hides, skins, or leather
-
- 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
- C14C3/06—Mineral tanning using chromium compounds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/64—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing low-molecular-weight organic compounds without sulfate or sulfonate groups
- D06P1/651—Compounds without nitrogen
- D06P1/65106—Oxygen-containing compounds
- D06P1/65131—Compounds containing ether or acetal groups
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/673—Inorganic compounds
- D06P1/67333—Salts or hydroxides
- D06P1/6735—Salts or hydroxides of alkaline or alkaline-earth metals with anions different from those provided for in D06P1/67341
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
- D06P3/02—Material containing basic nitrogen
- D06P3/04—Material containing basic nitrogen containing amide groups
- D06P3/32—Material containing basic nitrogen containing amide groups leather skins
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
- D06P5/02—After-treatment
- D06P5/04—After-treatment with organic compounds
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Textile Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention discloses a kind of environmentally friendly preparation technology without ammonia nitrogen double-layer leather, belong to leather technology field.The environmentally friendly preparation technology without ammonia nitrogen double-layer leather of the present invention comprises the following steps：Backwater, tanning, carry alkali, neutralization, dyeing and stuffing, fixation, drying and drying and buffing and gently fall, double-layer leather environmental protection and energy saving of the environmental protection without ammonia nitrogen made from the preparation technology of the present invention, skin body intensity is big, surface is smooth and feel is strong, sewage after the completion of preparation technology is free of ammonia nitrogen, environmentally friendly to environment.
Description
Technical field
The invention belongs to leather technology field, and in particular to a kind of preparation technology of the environmental protection without ammonia nitrogen double-layer leather.
Background technology
With the development of society, people's living standard more and more higher, an articles for daily use great variety of models, material is also multifarious,
People are also improved to traditional article, weeded out the old and bring forth the new, increasing fantasy appears in when using traditional articles for use
In daily output life.Leather and fur products is favored by people deeply always as the product that can embody identity status, however, leather and fur products
Due to needing to handle by post-production and most exquisite product could be embodied in people at the moment.With the increasing of people's environmental consciousness
By force, increasing people begin participating in the on of environmental protection and energy saving, and leather and fur products is required for carrying out cladding before finished product
Processing, and cladding processing generally requires to be sent to chemical reagent improves its performance, it is well known that many chemical reagent have very strong
Toxicity, if containing noxious material in articles for daily use, a undoubtedly stealthy bomb, so, prepare the leather of asepsis environment-protecting,
In machining process it is a kind of very strong challenge for cladding.It thus provides a kind of environmental protection and energy saving, skin body intensity is big, skin
Face is smooth and feel is strong, the preparation technology of double-layer leather of the sewage environmental protection without ammonia nitrogen after the completion of preparation.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of environmental protection and energy saving, skin body intensity is big, surface light
Sliding and feel is strong, the preparation technology of double-layer leather of the sewage environmental protection without ammonia nitrogen after the completion of preparation.
The present invention adopts the following technical scheme that：
The environmentally friendly preparation technology without ammonia nitrogen double-layer leather, comprises the following steps：
Step 1: backwater：
Double-layer fur material is placed in rotary drum and carries out backwater, obtains backwater cladding, wherein, the backwater process is：It is first past successively
Add 190~220% water according to the double-layer fur material percentage by weight meter in rotary drum, 0.3~0.6% degreasing agent and
0.4~0.6% rewetting agent, after 55~65min of rotary drum, then toward addition in rotary drum according to the double-layer fur material percentage by weight
0.9~1.2% macerating enzyme of meter, then after 55~65min of rotary drum, is added according to the double-layer fur material percentage by weight meter
0.4~0.7% oxalic acid and 0.2~0.4% formic acid, then 55~65min of rotary drum, then discharge opeing, then adds water to be washed
Wash in discharge opeing.
Step 2: tanning：
Gained backwater cladding in step 1 is subjected to tanning, obtains tanning cladding, wherein, the tannery is：In rotary drum
Inside sequentially add 90~110% water and 0.2~0.4% formic acid according to the double-layer fur material percentage by weight meter, rotary drum
PH is 2.8~3.0 after 25~35min, then intervenes 2~4% chromium powder according to the double-layer fur material percentage by weight meter, is turned
85~95min of drum.
Step 3: carry alkali：
Gained tanning cladding in step 2 is carried out carrying alkali, alkali cladding must be carried, wherein, the alkali cladding process that carries is：
After tannery terminates described in step 2, added toward rotary drum is interior according to the 48~52% of the double-layer fur material percentage by weight meter
Water and 0.8~1.2% sodium formate, after 25~35min of rotary drum, be subsequently added into according to the double-layer fur material percentage by weight meter
0.4~0.6% sodium bicarbonate, pH is 3.8~4.1 after 25~35min of rotary drum, then discharge opeing, finally plus water washing.
Step 4: neutralize：
Gained in step 3 is carried into alkali cladding to be neutralized, obtains neutralization cladding, wherein, the N-process is：Toward rotary drum
Inside sequentially add 115~125% water according to the double-layer fur material percentage by weight meter, 1.8~2.2% sodium formate and
1.8~2.2% nertralizer, after 35~45min of rotary drum, add 0.9 according to the double-layer fur material percentage by weight meter~
1.1% sodium bicarbonate, 0.7~0.9% dodium thiosulfate and 0.4~0.6% sodium sulfite, after 85~95min of rotary drum, add according to
0.8~1.1% acrylic acid of the double-layer fur material percentage by weight meter, pH is 5.8~6.0 heel row after 55~65min of rotary drum
Water, draining after then adding water washing twice.
Step 5: dyeing and stuffing：
Cladding is neutralized to gained in step 4 to be dyed and stuffing, obtains stuffing cladding, wherein dyeing course is：In rotary drum
Inside sequentially add 1.9~2.2% syntannin according to the double-layer fur material percentage by weight meter, 1.3~1.6% displacement
Tannin, 0.4~0.6% sodium bicarbonate and 1.8~2.1% dispersant, and toward addition dyestuff in rotary drum, then rotary drum 55~
Stuffing processing is carried out after 65min, wherein, in the stuffing processing procedure, sequentially add according to the double-layer fur material weight percent
Than 2.8~3.3% synthetic fat liquors of meter, 2.9~3.2% L-3, the 2400 of 1.8~2.2%, 0.9~1.1% OSL and
0.08~0.12% mould inhibitor, then 55~65min of rotary drum.
Step 6: fixation：
Gained stuffing cladding in step 5 is subjected to fixation treatment, obtains fixation cladding, wherein, the fixation treatment process
For：After step 5 stuffing process rotary drum terminates, toward add 145 according to the double-layer fur material percentage by weight meter in rotary drum~
155% water and 1.7~2.2% formic acid, wherein, the formic acid trisection, add first part of formic acid after rotary drum 9~
11min, second part of 14~16min of the formic acid rotary drum is then added, then add pH after the 3rd part of 18~22min of formic acid rotary drum
For 3.8~4.0.
Step 7: dry and dry：
Gained stuffing cladding in step 6 is placed in vacuum drier and is dried, 65~75 DEG C of dry temperature level,
Cladding must be dried, then gained drying cladding is placed in drying baker and dried, obtains drying cladding.
Step 8: buffing and gently falling：
Gained drying cladding in step 7 is subjected to buffing and gently fallen, produces environmental protection without ammonia nitrogen double-layer leather.
Further, the step 1 backwater process is：First successively toward addition in rotary drum according to the double-layer fur material weight
200% water of percentages, water temperature are 40~50 DEG C, 0.5% degreasing agent and 0.5% rewetting agent, after rotary drum 60min,
Then then after rotary drum 60min, add according to 1% macerating enzyme of the double-layer fur material percentage by weight meter toward addition in rotary drum
Enter 0.6% oxalic acid and 0.3% formic acid according to the double-layer fur material percentage by weight meter, then rotary drum 60min, is then arranged
Liquid, then plus water washed in discharge opeing twice, during adding water washing, water temperature be 26~28 DEG C, each wash water time be 5~
10min。
Further, the step 2 tannery is：Sequentially added in rotary drum according to the double-layer fur material weight hundred
Point than meter 100% water and 0.3% formic acid, pH is 2.8~3.0 after rotary drum 30min, is then intervened according to the double-layer fur
Expect 3% chromium powder of percentage by weight meter, rotary drum 90min.
Further, the step 3 puies forward alkali cladding process and is：After tannery terminates described in step 2, toward rotary drum
Interior 50% water and 1% sodium formate added according to the double-layer fur material percentage by weight meter, after rotary drum 30min, then plus
Enter 0.5% sodium bicarbonate according to the double-layer fur material percentage by weight meter, pH is 4.0 after rotary drum 30m, then discharge opeing, finally
Add water washing, during wash water, water temperature is 26~28 DEG C, and each wash water time is 5~10min.
Further, the step 4 N-process is：Sequentially added in toward rotary drum according to the double-layer fur material weight hundred
Point than meter 120% water, 2% sodium formate and 2% nertralizer, after rotary drum 40min, add according to the double-layer fur material weight
Measure 1% sodium bicarbonate of percentages, 0.8% dodium thiosulfate and 0.5% sodium sulfite, after rotary drum 90min, add according to described
1% acrylic acid of double-layer fur material percentage by weight meter, pH is draining after 5.8~6.0 after rotary drum 60min, then carries out wash water
Draining after twice, during wash water, water temperature is 26~28 DEG C, and each wash water time is 5~10min.
Further, the step 5 dyeing course is：Sequentially added in rotary drum according to the double-layer fur material weight hundred
Divide 2% syntannin than meter, 1.5% displacement tannin, 0.5% sodium bicarbonate and 2% dispersant, and addition in past rotary drum
Dyestuff, stuffing processing is then carried out after rotary drum 60min, wherein, in the stuffing processing procedure, sequentially add according to described two layers
3% synthetic fat liquor of cladding percentage by weight meter, 3% L-3, the 2400 of 2%, 1% OSL and 0.1% mould inhibitor, so
Rotary drum 60min afterwards.
Further, the step 6 fixation treatment process is：Added in rotary drum according to the double-layer fur material weight hundred
Divide 150% water and 2% formic acid than meter, wherein, the formic acid trisection, add rotary drum after first part of formic acid
10min, second part of formic acid rotary drum 15min is then added, pH is 3.9 after then adding the 3rd part of formic acid rotary drum 20min.
Further, the temperature 70 C dried in the step 7.
The present invention compared with prior art, has the advantages that：
The environmentally friendly preparation technology without ammonia nitrogen double-layer leather of the present invention, in whole technological process, does not add any contain
Ammonia nitrogen class reagent, the waste gas wastewater treatment difficulty discharged in each processing step is small, and environmental pollution influences small, and is adapted to each
Individual medium-sized and small enterprises promote the use of；
Cladding is effectively cleaned by the backwater to cladding, and adds rewetting agent and macerating enzyme, when improving backwater
The effect of washing, during follow-up tanning and carrying alkali, the flexibility of cladding is improved, in dyeing course, is effectively improved
Cladding color fastness, effectively prevent from going mouldy, increase the service life, the sewage after the completion of preparation is free of ammonia nitrogen, environment protecting and power-saving, protects
The security of leather products has been demonstrate,proved, and surface slippery feel is strong, skin body intensity is big.
Embodiment
Raw material used in the present invention is commercially available product, wherein：
Rewetting agent is the You Sha nations W purchased from BASF China；
Macerating enzyme is the Ba Xinmei B10 purchased from BASF China；
Nertralizer is the SYNTAN PN purchased from Shi Mite (Nanjing) leather chemicals Co., Ltd；
Syntannin is the Bath pellet FR-BC purchased from BASF China；
It is for purchased from the SYNTAN SM of Shi Mite (Nanjing) leather chemicals Co., Ltd to replace tannin；
Acrylic acid is the sharp tan pellet FR-RV purchased from BASF China；
Mould inhibitor is the Busan 30L purchased from baukmam companies of the U.S.；
2400 be purchased from the 2400 of Fu Yu Industrial Co., Ltd.s；
OSL is the TRUPON OSL purchased from Tang Pule chemical dyestuffs (Jiaxing) Co., Ltd
Synthetic fat liquor is the synthetic fat liquor TJ-F5193 purchased from Sichuan Ting Jiang new materials limited company；(product
Full name)
L-3 is the fatting agent TJ-F203B purchased from Sichuan Ting Jiang new materials limited company.
Embodiment 1
The environmentally friendly preparation technology without ammonia nitrogen double-layer leather, comprises the following steps：
Step 1: backwater：
Double-layer fur material is placed in rotary drum and carries out backwater, obtains backwater cladding, wherein, the backwater process is：It is first past successively
190% water according to the double-layer fur material percentage by weight meter, 0.3% degreasing agent and 0.4% rewetting are added in rotary drum
Agent, after rotary drum 55min, then connect toward addition in rotary drum according to 0.9% macerating enzyme of the double-layer fur material percentage by weight meter
After rotary drum 55min, 0.4% oxalic acid and 0.2% formic acid according to the double-layer fur material percentage by weight meter are added, then
Rotary drum 55min, then discharge opeing, then plus water is washed in discharge opeing, and during adding water washing, water temperature is 26~28 DEG C, every time
The wash water time is 5~10min.
Step 2: tanning：
Gained backwater cladding in step 1 is subjected to tanning, obtains tanning cladding, wherein, the tannery is：In rotary drum
90% water and 0.2% formic acid according to the double-layer fur material percentage by weight meter are inside sequentially added, pH is after rotary drum 25min
2.8, then intervene 2% chromium powder according to the double-layer fur material percentage by weight meter, rotary drum 85min.
Step 3: carry alkali：
Gained tanning cladding in step 2 is carried out carrying alkali, alkali cladding must be carried, wherein, the alkali cladding process that carries is：
After tannery terminates described in step 2, toward interior 48% water added according to the double-layer fur material percentage by weight meter of rotary drum
Sodium formate with 0.8%, after rotary drum 25min, is subsequently added into 0.4% little Su according to the double-layer fur material percentage by weight meter
Beat, pH is 3.8 after rotary drum 25min, then discharge opeing, and finally plus water washing, during wash water, water temperature is 26~28 DEG C, is washed every time
The water time is 5~10min.
Step 4: neutralize：
Gained in step 3 is carried into alkali cladding to be neutralized, obtains neutralization cladding, wherein, the N-process is：Toward rotary drum
Inside sequentially add 115% water according to the double-layer fur material percentage by weight meter, 1.8% sodium formate and 1.8% neutralization
Agent, after rotary drum 35min, add 0.9% sodium bicarbonate according to the double-layer fur material percentage by weight meter, 0.7% dodium thiosulfate and
0.4% sodium sulfite, after rotary drum 85min, 0.8% acrylic acid according to the double-layer fur material percentage by weight meter is added,
PH is draining after 5.8 after rotary drum 55min, draining after then adding water washing twice, and during wash water, water temperature is 26~28 DEG C, often
The secondary wash water time is 5~10min.
Step 5: dyeing and stuffing：
Cladding is neutralized to gained in step 4 to be dyed and stuffing, obtains stuffing cladding, wherein dyeing course is：In rotary drum
Inside sequentially add 1.9% syntannin according to the double-layer fur material percentage by weight meter, 1.3% displacement tannin, 0.4%
Sodium bicarbonate and 1.8% dispersant, and dyestuff is added toward rotary drum is interior, stuffing processing is then carried out after rotary drum 55min, wherein, institute
State in stuffing processing procedure, sequentially add 2.8% synthetic fat liquor according to the double-layer fur material percentage by weight meter, 2.9%
L-3, the 2400 of 1.8%, 0.9% OSL and 0.08% mould inhibitor, then rotary drum 55min.
Step 6: fixation：
Gained stuffing cladding in step 5 is subjected to fixation treatment, obtains fixation cladding, wherein, the fixation treatment process
For：After step 5 stuffing process rotary drum terminates, toward add in rotary drum according to the double-layer fur material percentage by weight meter 145%
Water and 1.7% formic acid, wherein, the formic acid trisection, rotary drum 9min after first part of formic acid is added, then adds second
Part formic acid rotary drum 14min, pH is 3.8 after then adding the 3rd part of formic acid rotary drum 18min；
Step 7: dry and dry：
Gained stuffing cladding in step 6 is placed in vacuum drier and is dried, 65 DEG C of dry temperature level, is obtained dry
Dry cladding, then gained drying cladding is placed in drying baker and dried, obtains drying cladding.
Step 8: buffing and gently falling：
Gained drying cladding in step 7 is subjected to buffing and gently fallen, produces environmental protection without ammonia nitrogen double-layer leather.
Embodiment 2
The environmentally friendly preparation technology without ammonia nitrogen double-layer leather, it is characterised in that comprise the following steps：
Step 1: backwater：
Double-layer fur material is placed in rotary drum and carries out backwater, obtains backwater cladding, wherein, the backwater process is：It is first past successively
200% water according to the double-layer fur material percentage by weight meter is added in rotary drum, water temperature is 40~50 DEG C, 0.5% degreasing
Agent and 0.5% rewetting agent, after rotary drum 60min, then toward addition in rotary drum according to the double-layer fur material percentage by weight meter
1% macerating enzyme, then after rotary drum 60min, add according to the double-layer fur material percentage by weight meter 0.6% oxalic acid and
0.3% formic acid, then rotary drum 60min, then discharge opeing, then adds water to be washed in discharge opeing twice, during adding water washing,
Water temperature is 26~28 DEG C, and each wash water time is 5~10min.
Step 2: tanning：
Gained backwater cladding in step 1 is subjected to tanning, obtains tanning cladding, wherein, the step 2 tannery is：
100% water and 0.3% formic acid according to the double-layer fur material percentage by weight meter, rotary drum are sequentially added in rotary drum
PH is 2.8~3.0 after 30min, then intervenes 3% chromium powder according to the double-layer fur material percentage by weight meter, rotary drum
90min。
Step 3: carry alkali：
Gained tanning cladding in step 2 is carried out carrying alkali, alkali cladding must be carried, wherein, the alkali cladding process that carries is：
After tannery terminates described in step 2, toward interior 50% water added according to the double-layer fur material percentage by weight meter of rotary drum
Sodium formate with 1%, after rotary drum 30min, is subsequently added into 0.5% little Su according to the double-layer fur material percentage by weight meter
Beat, pH is 4.0 after rotary drum 30m, then discharge opeing, and finally plus water washing, during wash water, water temperature is 26~28 DEG C, each wash water
Time is 5~10min.
Step 4: neutralize：
Gained in step 3 is carried into alkali cladding to be neutralized, obtains neutralization cladding, wherein, the N-process is：Toward rotary drum
120% water according to the double-layer fur material percentage by weight meter, 2% sodium formate and 2% nertralizer are inside sequentially added, is turned
After drum 40min, add 1% sodium bicarbonate according to the double-layer fur material percentage by weight meter, 0.8% dodium thiosulfate and 0.5%
Sodium sulfite, after rotary drum 90min, add 1% acrylic acid according to the double-layer fur material percentage by weight meter, rotary drum 60min
PH is draining after 5.8~6.0 afterwards, draining after then carrying out wash water twice, and during wash water, water temperature is 26~28 DEG C, is washed every time
The water time is 5~10min.
Step 5: dyeing and stuffing：
Cladding is neutralized to gained in step 4 to be dyed and stuffing, obtains stuffing cladding, wherein dyeing course is：In rotary drum
2% syntannin according to the double-layer fur material percentage by weight meter is inside sequentially added, 1.5% displacement tannin, 0.5% is small
Soda and 2% dispersant, and dyestuff is added toward rotary drum is interior, stuffing processing is then carried out after rotary drum 60min, wherein, it is described to add
In fat processing procedure, 3% synthetic fat liquor according to the double-layer fur material percentage by weight meter is sequentially added, 3% L-3,2%
2400,1% OSL and 0.1% mould inhibitor, then rotary drum 60min.
Step 6: fixation：
Gained stuffing cladding in step 5 is subjected to fixation treatment, obtains fixation cladding, wherein, the fixation treatment process
For：150% water and 2% formic acid according to the double-layer fur material percentage by weight meter are added in rotary drum, wherein, the first
Sour trisection, rotary drum 10min after first part of formic acid is added, then add second part of formic acid rotary drum 15min, Ran Houjia
PH is 3.9 after entering the 3rd part of formic acid rotary drum 20min.
Step 7: dry and dry：
Gained stuffing cladding in step 6 is placed in vacuum drier and is dried, 70 DEG C of dry temperature level, is obtained dry
Dry cladding, then gained drying cladding is placed in drying baker and dried, obtains drying cladding.
Step 8: buffing and gently falling：
Gained drying cladding in step 7 is subjected to buffing and gently fallen, produces environmental protection without ammonia nitrogen double-layer leather.
Embodiment 3
The environmentally friendly preparation technology without ammonia nitrogen double-layer leather, comprises the following steps：
Step 1: backwater：
Double-layer fur material is placed in rotary drum and carries out backwater, obtains backwater cladding, wherein, the backwater process is：It is first past successively
220% water according to the double-layer fur material percentage by weight meter, 0.6% degreasing agent and 0.6% rewetting are added in rotary drum
Agent, after rotary drum 65min, then connect toward addition in rotary drum according to 1.2% macerating enzyme of the double-layer fur material percentage by weight meter
After rotary drum 65min, 0.7% oxalic acid and 0.4% formic acid according to the double-layer fur material percentage by weight meter are added, then
Rotary drum 65min, then discharge opeing, then plus water is washed in discharge opeing twice, and during adding water washing, water temperature is 26~28 DEG C,
Each wash water time is 5~10min.
Step 2: tanning：
Gained backwater cladding in step 1 is subjected to tanning, obtains tanning cladding, wherein, the tannery is：In rotary drum
Inside sequentially add 110% water and 0.4% formic acid according to the double-layer fur material percentage by weight meter, pH after rotary drum 35min
For 3.0,4% chromium powder according to the double-layer fur material percentage by weight meter, rotary drum 95min are then intervened.
Step 3: carry alkali：
Gained tanning cladding in step 2 is carried out carrying alkali, alkali cladding must be carried, wherein, the alkali cladding process that carries is：
After tannery terminates described in step 2, toward interior 52% water added according to the double-layer fur material percentage by weight meter of rotary drum
Sodium formate with 1.2%, after rotary drum 35min, is subsequently added into 0.6% little Su according to the double-layer fur material percentage by weight meter
Beat, pH is 4.1 after rotary drum 35min, then discharge opeing, and finally plus water washing, during wash water, water temperature is 26~28 DEG C, is washed every time
The water time is 5~10min.
Step 4: neutralize：
Gained in step 3 is carried into alkali cladding to be neutralized, obtains neutralization cladding, wherein, the N-process is：Toward rotary drum
Inside sequentially add 125% water according to the double-layer fur material percentage by weight meter, 2.2% sodium formate and 2.2% neutralization
Agent, after rotary drum 45min, add 1.1% sodium bicarbonate according to the double-layer fur material percentage by weight meter, 0.9% dodium thiosulfate and
0.6% sodium sulfite, after rotary drum 95min, 1.1% acrylic acid according to the double-layer fur material percentage by weight meter is added,
PH is draining after 6.0 after rotary drum 65min, draining after then adding water washing twice, and during adding water washing, water temperature is 26~28
DEG C, each wash water time is 5~10min.
Step 5: dyeing and stuffing：
Cladding is neutralized to gained in step 4 to be dyed and stuffing, obtains stuffing cladding, wherein dyeing course is：In rotary drum
2.2% syntannin according to the double-layer fur material percentage by weight meter is inside sequentially added, 1.6% displacement tannin, 0.6 is small
Soda and 2.1% dispersant, and dyestuff is added toward rotary drum is interior, stuffing processing is then carried out after rotary drum 65min, wherein, it is described
In stuffing processing procedure, 3.3% synthetic fat liquor according to the double-layer fur material percentage by weight meter is sequentially added, 3.2%
L-3, the 2400 of 2.2%, 1.1% OSL and 0.12% mould inhibitor, then rotary drum 65min.
Step 6: fixation：
Gained stuffing cladding in step 5 is subjected to fixation treatment, obtains fixation cladding, wherein, the fixation treatment process
For：After step 5 stuffing process rotary drum terminates, toward add in rotary drum according to the double-layer fur material percentage by weight meter 155%
Water and 2.2% formic acid, wherein, the formic acid trisection, rotary drum 11min after first part of formic acid is added, then add the
Two parts of formic acid rotary drum 16min, pH is 4.0 after then adding the 3rd part of formic acid rotary drum 22min.
Step 7: dry and dry：
Gained stuffing cladding in step 6 is placed in vacuum drier and is dried, 75 DEG C of dry temperature level, is obtained dry
Dry cladding, then gained drying cladding is placed in drying baker and dried, obtains drying cladding.
Step 8: buffing and gently falling：
Gained drying cladding in step 7 is subjected to buffing and gently fallen, produces environmental protection without ammonia nitrogen double-layer leather.
As tensile testing machine, non-yellowing test machine and omnipotent abrasiometer to obtained by embodiments of the invention 1~3
Environmental protection is detected without ammonia nitrogen double-layer leather, and caused sewage after preparation technology is detected, testing result such as table 1 below；
Sewage after preparation technology is detected, detection method is as follows：
Using distillation acid base neutralization titration method：
Step 1: dilution：Wastewater Sample 25mL is taken, adds 225mL distilled water dilutings, obtains dilute sewage water sample；
Step 2: adding magnesia in regulation pH and then past gained dilute sewage water sample, pH to 8.0 is adjusted, is obtained to be distilled
Wastewater Sample, magnesia are dissolved in dilute sewage water sample, it is contributed to the volatilization of ammonia nitrogen in subsequent step into alkalescent；
Step 3: configuration mixed indicator：Take 200mg methyl reds to be dissolved in 100mL ethanol, obtain methyl red indicator, take
50mg bromthymol blues are dissolved in 50mL ethanol, obtain bromthymol blue indicator, then by gained methyl red indicator and gained
Bromthymol blue mixes, and obtains mixed indicator；
Step 4: distillation：By the way of distillation, gained Wastewater Sample to be distilled in step 2 is distilled, in receiving flask
Boric acid equipped with 50mL20g/L, boric acid, if Sewage water sample to be distilled contains ammonia nitrogen, can absorb what is distilled out in acidity
Ammonia nitrogen, when distillate instills the boric acid entered in receiving flask, until when the volume of boric acid is 250mL, stopping is distilled, and obtains sewage steaming
Distillate；
Step 5: titration：Gained mixed indicator in step 3 is instilled 2~3 and drops to gained sewage distillation in step 4
In liquid, titrated with 0.02mol/L hydrochloric acid；
When sewage distillate color change is：During colourless-pale red, show to be free of ammonia nitrogen in sewage；
When sewage distillate color change is：During colourless-blue-green, show to contain ammonia nitrogen in sewage；
Table 1：The environmentally friendly testing result without ammonia nitrogen double-layer leather of embodiment 1~3：
From table 1 it follows that environmental protection is resistance to tear and resistance to drawing without ammonia nitrogen double-layer leather made from the preparation technology of the present invention
Performance is strong, and anti-yellowing property is excellent, good water-proof effect, has very strong abrasion performance and resistance to tortuous performance, remaining after the completion of preparation
Sewage be free of ammonia nitrogen, environmental protection and energy saving are adapted to out of doors that (such as climbing boot and binding apparatus) widely uses on articles for use.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (8)
1. the environmentally friendly preparation technology without ammonia nitrogen double-layer leather, it is characterised in that comprise the following steps：
Step 1: backwater：
Double-layer fur material is placed in rotary drum and carries out backwater, obtains backwater cladding, wherein, the backwater process is：First successively toward rotary drum
Interior 190 ~ 220% water added according to the double-layer fur material percentage by weight meter, 0.3 ~ 0.6% degreasing agent and 0.4 ~ 0.6%
Rewetting agent, after 55 ~ 65min of rotary drum, then toward addition in rotary drum according to the 0.9 ~ 1.2% of the double-layer fur material percentage by weight meter
Macerating enzyme, then after 55 ~ 65min of rotary drum, add 0.4 ~ 0.7% oxalic acid according to the double-layer fur material percentage by weight meter
With 0.2 ~ 0.4% formic acid, then 55 ~ 65min of rotary drum, then discharge opeing, then adds water to be washed in discharge opeing；
Step 2: tanning：
Gained backwater cladding in step 1 is subjected to tanning, obtains tanning cladding, wherein, the tannery is：In rotary drum according to
Secondary 90 ~ 110% water and 0.2 ~ 0.4% formic acid added according to the double-layer fur material percentage by weight meter, 25 ~ 35min of rotary drum
PH is 2.8 ~ 3.0 afterwards, then intervenes 2 ~ 4% chromium powder according to the double-layer fur material percentage by weight meter, 85 ~ 95min of rotary drum；
Step 3: carry alkali：
Gained tanning cladding in step 2 is carried out carrying alkali, alkali cladding must be carried, wherein, the alkali cladding process that carries is：In step
After tannery terminates described in two, toward add in rotary drum according to the double-layer fur material percentage by weight meter 48 ~ 52% water and
0.8 ~ 1.2% sodium formate, after 25 ~ 35min of rotary drum, it is subsequently added into 0.4 according to the double-layer fur material percentage by weight meter ~
0.6% sodium bicarbonate, pH is 3.8 ~ 4.1 after 25 ~ 35min of rotary drum, then discharge opeing, finally plus water washing；
Step 4: neutralize：
Gained in step 3 is carried into alkali cladding to be neutralized, obtains neutralization cladding, wherein, the N-process is：Toward in rotary drum according to
Secondary 115 ~ 125% water added according to the double-layer fur material percentage by weight meter, 1.8 ~ 2.2% sodium formate and 1.8 ~ 2.2%
Nertralizer, after 35 ~ 45min of rotary drum, add 0.9 ~ 1.1% sodium bicarbonate according to the double-layer fur material percentage by weight meter, 0.7 ~
0.9% dodium thiosulfate and 0.4 ~ 0.6% sodium sulfite, after 85 ~ 95min of rotary drum, add according to the double-layer fur material weight percent
Than 0.8 ~ 1.1% acrylic acid of meter, pH is draining after 5.8 ~ 6.0 after 55 ~ 65min of rotary drum, then adds water washing heel row twice
Water；
Step 5: dyeing and stuffing：
Cladding is neutralized to gained in step 4 to be dyed and stuffing, obtains stuffing cladding, wherein dyeing course is：In rotary drum according to
Secondary 1.9 ~ 2.2% syntannin added according to the double-layer fur material percentage by weight meter, 1.3 ~ 1.6% displacement tannin, 0.4
~ 0.6 sodium bicarbonate and 1.8 ~ 2.1% dispersant, and toward addition dyestuff in rotary drum, then carried out after 55 ~ 65min of rotary drum at stuffing
Reason, wherein, in the stuffing processing procedure, sequentially add 2.8 ~ 3.3% synthesis according to the double-layer fur material percentage by weight meter
Fatting agent, 2.9 ~ 3.2% L-3, the 2400 of 1.8 ~ 2.2%, 0.9 ~ 1.1% OSL and 0.08 ~ 0.12% mould inhibitor, Ran Houzhuan
55 ~ 65min of drum；
Step 6: fixation：
Gained stuffing cladding in step 5 is subjected to fixation treatment, obtains fixation cladding, wherein, the fixation treatment process is：Step
After rapid five stuffings process rotary drum terminates, toward interior 145 ~ 155% water added according to the double-layer fur material percentage by weight meter of rotary drum
With 1.7 ~ 2.2% formic acid, wherein, the formic acid trisection, add first part of formic acid after 9 ~ 11min of rotary drum, then add
Second part of 14 ~ 16min of the formic acid rotary drum, pH is 3.8 ~ 4.0 after then adding the 3rd part of 18 ~ 22min of formic acid rotary drum；
Step 7: dry and dry：
Gained stuffing cladding in step 6 is placed in vacuum drier and is dried, 65 ~ 75 DEG C of dry temperature level, obtains drying
Cladding, then gained drying cladding is placed in drying baker and dried, obtains drying cladding；
Step 8: buffing and gently falling：
Gained drying cladding in step 7 is subjected to buffing and gently fallen, produces environmental protection without ammonia nitrogen double-layer leather.
2. preparation technology of the environmental protection without ammonia nitrogen double-layer leather according to claim 1, it is characterised in that the step 1 is returned
Water process is：First 200% water toward addition in rotary drum according to the double-layer fur material percentage by weight meter, water temperature are 40 ~ 50 successively
DEG C, 0.5% degreasing agent and 0.5% rewetting agent, after rotary drum 60min, then toward addition in rotary drum according to the double-layer fur material weight
1% macerating enzyme of percentages is measured, then after rotary drum 60min, adds 0.6% according to the double-layer fur material percentage by weight meter
Oxalic acid and 0.3% formic acid, then rotary drum 60min, then discharge opeing, then plus water is washed in discharge opeing twice, adds water washing
During, water temperature is 26 ~ 28 DEG C, and each wash water time is 5 ~ 10min.
3. preparation technology of the environmental protection without ammonia nitrogen double-layer leather according to claim 1, it is characterised in that the step 2 tan
Process processed is：100% water and 0.3% formic acid according to the double-layer fur material percentage by weight meter are sequentially added in rotary drum,
PH is 2.8 ~ 3.0 after rotary drum 30min, then intervenes 3% chromium powder according to the double-layer fur material percentage by weight meter, rotary drum
90min。
4. preparation technology of the environmental protection without ammonia nitrogen double-layer leather according to claim 1, it is characterised in that the step 3 carries
Alkali cladding process is：After tannery terminates described in step 2, added toward rotary drum is interior according to the double-layer fur material weight hundred
Point than meter 50% water and 1% sodium formate, after rotary drum 30min, be subsequently added into according to the double-layer fur material percentage by weight meter
0.5% sodium bicarbonate, pH is 4.0 after rotary drum 30m, then discharge opeing, and finally plus water washing, during wash water, water temperature is 26 ~ 28
DEG C, each wash water time is 5 ~ 10min.
5. preparation technology of the environmental protection without ammonia nitrogen double-layer leather according to claim 1, it is characterised in that in the step 4
It is with process：Sequentially add 120% water according to the double-layer fur material percentage by weight meter in toward rotary drum, 2% sodium formate and
2% nertralizer, after rotary drum 40min, add 1% sodium bicarbonate according to the double-layer fur material percentage by weight meter, 0.8% great Su
Beat and 0.5% sodium sulfite, after rotary drum 90min, add 1% acrylic acid according to the double-layer fur material percentage by weight meter,
PH is draining after 5.8 ~ 6.0 after rotary drum 60min, draining after then carrying out wash water twice, and during wash water, water temperature is 26 ~ 28 DEG C,
Each wash water time is 5 ~ 10min.
6. preparation technology of the environmental protection without ammonia nitrogen double-layer leather according to claim 1, it is characterised in that the step 5 dye
Color process is：Sequentially add 2% syntannin according to the double-layer fur material percentage by weight meter in rotary drum, 1.5% puts
Tannin, 0.5% sodium bicarbonate and 2% dispersant are changed, and toward addition dyestuff in rotary drum, is then carried out after rotary drum 60min at stuffing
Reason, wherein, in the stuffing processing procedure, sequentially add and synthesize stuffing according to the 3% of the double-layer fur material percentage by weight meter
Agent, 3% L-3, the 2400 of 2%, 1% OSL and 0.1% mould inhibitor, then rotary drum 60min.
7. preparation technology of the environmental protection without ammonia nitrogen double-layer leather according to claim 1, it is characterised in that the step 6 is consolidated
Color processing procedure is：150% water and 2% formic acid according to the double-layer fur material percentage by weight meter are added in rotary drum, its
In, the formic acid trisection, rotary drum 10min after first part of formic acid is added, then add second part of formic acid rotary drum
15min, pH is 3.9 after then adding the 3rd part of formic acid rotary drum 20min.
8. preparation technology of the environmental protection without ammonia nitrogen double-layer leather according to claim 1, it is characterised in that in the step 7
Dry temperature 70 C.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112063775A (en) * | 2020-09-12 | 2020-12-11 | 漳州香洲皮革有限公司 | Treatment method for preventing black leather from mildewing |
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| CN104611482A (en) * | 2015-01-22 | 2015-05-13 | 浙江祥隆皮革有限公司 | Retanning and dyeing method of sheep skin |
| CN105296686A (en) * | 2015-11-24 | 2016-02-03 | 徐秋苹 | Leather production technique |
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| CN102304592A (en) * | 2011-08-02 | 2012-01-04 | 峰安皮业股份有限公司 | Production process of suede leather |
| CN102864660A (en) * | 2012-09-29 | 2013-01-09 | 桐乡市雄鹰皮草有限公司 | Tanning and dyeing process for mink fur and leather |
| CN104611482A (en) * | 2015-01-22 | 2015-05-13 | 浙江祥隆皮革有限公司 | Retanning and dyeing method of sheep skin |
| CN105296686A (en) * | 2015-11-24 | 2016-02-03 | 徐秋苹 | Leather production technique |
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