CN105506196B - One kind is without chrome tanning pigskin head layer upper leather preparation technology - Google Patents
One kind is without chrome tanning pigskin head layer upper leather preparation technology Download PDFInfo
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- CN105506196B CN105506196B CN201610050180.3A CN201610050180A CN105506196B CN 105506196 B CN105506196 B CN 105506196B CN 201610050180 A CN201610050180 A CN 201610050180A CN 105506196 B CN105506196 B CN 105506196B
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- 239000010985 leather Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 238000005516 engineering process Methods 0.000 title claims abstract description 23
- 238000004043 dyeing Methods 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000005238 degreasing Methods 0.000 claims abstract description 8
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 8
- 238000005554 pickling Methods 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 34
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 24
- 230000008569 process Effects 0.000 claims description 19
- 239000004280 Sodium formate Substances 0.000 claims description 12
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 12
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 12
- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical compound [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 claims description 12
- 235000019254 sodium formate Nutrition 0.000 claims description 12
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 claims description 11
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 9
- 239000003112 inhibitor Substances 0.000 claims description 9
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 7
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- TUBQDCKAWGHZPF-UHFFFAOYSA-N 1,3-benzothiazol-2-ylsulfanylmethyl thiocyanate Chemical compound C1=CC=C2SC(SCSC#N)=NC2=C1 TUBQDCKAWGHZPF-UHFFFAOYSA-N 0.000 claims description 5
- 235000007627 Caesalpinia Nutrition 0.000 claims description 5
- 241000522234 Caesalpinia Species 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 230000005012 migration Effects 0.000 claims description 5
- 238000013508 migration Methods 0.000 claims description 5
- 239000001648 tannin Substances 0.000 claims description 5
- 235000018553 tannin Nutrition 0.000 claims description 5
- 229920001864 tannin Polymers 0.000 claims description 5
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 4
- 239000004925 Acrylic resin Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- 235000019253 formic acid Nutrition 0.000 claims description 4
- 230000006872 improvement Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 235000013311 vegetables Nutrition 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 3
- 239000003963 antioxidant agent Substances 0.000 claims description 3
- 230000003078 antioxidant effect Effects 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 239000013527 degreasing agent Substances 0.000 claims description 3
- 238000005237 degreasing agent Methods 0.000 claims description 3
- 239000000975 dye Substances 0.000 claims description 3
- 150000002148 esters Chemical class 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 235000021323 fish oil Nutrition 0.000 claims description 3
- AWUCVROLDVIAJX-UHFFFAOYSA-N glycerol 1-phosphate Chemical compound OCC(O)COP(O)(O)=O AWUCVROLDVIAJX-UHFFFAOYSA-N 0.000 claims description 3
- 235000019198 oils Nutrition 0.000 claims description 3
- 235000006408 oxalic acid Nutrition 0.000 claims description 3
- 238000006277 sulfonation reaction Methods 0.000 claims description 3
- 239000004094 surface-active agent Substances 0.000 claims description 3
- 238000010257 thawing Methods 0.000 claims description 3
- 239000012745 toughening agent Substances 0.000 claims description 3
- 238000004073 vulcanization Methods 0.000 claims description 3
- 235000006708 antioxidants Nutrition 0.000 claims description 2
- 125000002091 cationic group Chemical group 0.000 claims description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- JPMIIZHYYWMHDT-UHFFFAOYSA-N octhilinone Chemical compound CCCCCCCCN1SC=CC1=O JPMIIZHYYWMHDT-UHFFFAOYSA-N 0.000 claims description 2
- 239000000080 wetting agent Substances 0.000 claims description 2
- 238000007792 addition Methods 0.000 claims 8
- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical compound C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 claims 2
- 239000000654 additive Substances 0.000 abstract description 3
- 230000000996 additive effect Effects 0.000 abstract description 3
- 238000005406 washing Methods 0.000 description 5
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- UZASMYQTKALYAA-UHFFFAOYSA-N 1-benzothiophene 1H-pyrrole Chemical class N1C=CC=C1.S1C=CC2=C1C=CC=C2 UZASMYQTKALYAA-UHFFFAOYSA-N 0.000 description 1
- 241000283707 Capra Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 glutaraldehyde aldehyde Chemical class 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910000073 phosphorus hydride Inorganic materials 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C1/00—Chemical treatment prior to tanning
- C14C1/08—Deliming; Bating; Pickling; Degreasing
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/04—Mineral tanning
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/08—Chemical tanning by organic agents
-
- 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
- C14C3/10—Vegetable tanning
- C14C3/12—Vegetable tanning using purified or modified vegetable tanning agents
-
- 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
- C14C5/00—Degreasing 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
- C14C9/00—Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention belongs to upper leather preparation technology field, more particularly to one kind to comprise the following steps without chrome tanning pigskin head layer upper leather preparation technology（Since sour skin scytoblastema, the addition of each operation additive is on the basis of the quality of sour skin）：Pickling eases back, main tanning, degreasing ease back, retanning, water squeezing neutralization, dyeing and fat-liquoring and draws soft whitewashing.The present invention provides one kind without chrome tanning pigskin head layer upper leather preparation technology, and it has, and step is simple, and preparation efficiency is high, and preparation process is low for equipment requirements, energy-conserving and environment-protective, prepares the advantages of upper leather of gained is wear-resisting, and high temperature resistant is plentiful, soft.
Description
Technical field
The invention belongs to upper leather preparation technology field, more particularly to one kind to prepare work without chrome tanning pigskin head layer upper leather
Skill.
Background technology
Curriery is the important traditional light industry in China, and one of more serious industry of blowdown.Traditional leather is more
Tanning agent is made using chromium, chrome leather made from processing has high temperature resistant, and heat endurance is good, leather body it is plentiful, it is soft the advantages of, but because
For chromium ore resource is limited and chrome tanning caused by heavy metal pollution, in people's pay attention to day by day living environment, concern uses environmentally friendly skin
Today of leather, develop no chromed tanned leather leather turns into inexorable trend.
The Chinese invention patent that patent publication No. is the A of CN 101225450, publication date is 2008.07.23 discloses one kind
The chrome-free tanning production technology of goat skin gloves leather, includes following steps, softening → pickling → organic phosphine tanning → oxidation
→ horse standing → water squeezing stretching, extension → shaving → washing → degreasing, rinsing → washing → brother chemicals → washing are taken, then routinely
Chrome tanning subsequent technique carry out.
But the production technology of the invention has tanning step complexity, efficiency is low, and the glove leather of tanning is of poor quality, not rich enough
Completely, the problem of not soft enough.
The content of the invention
It is an object of the invention to provide one kind without chrome tanning pigskin head layer upper leather preparation technology, it has, and step is simple, system
Standby efficiency high, prepares the advantages of upper leather of gained is wear-resisting, and high temperature resistant is plentiful, soft.
The present invention solves the technical scheme that problem above uses：It is a kind of without chrome tanning pigskin head layer upper leather preparation technology,
Comprise the following steps（Since sour skin scytoblastema, the addition of each operation additive is on the basis of the quality of sour skin）：Pickling eases back,
Main tanning, degreasing ease back, retanning, water squeezing neutralization, dyeing and fat-liquoring and draw soft whitewashing, and the pickling liquor ratio in step that eases back is
200%, add 1.0-1.2% sulfuric acid, 10-12% Nacl, pH 1.8-2.3, temperature is 25-28 DEG C, and the time that eases back is
120-150min, chrome-free tanning agent, including aluminium tanningagent and glutaraldehyde aldehyde tanning agent, pH scopes point three are used in the main tanning step
In the stage, 3.2-3.3, was adjusted by first time addition sodium formate and sodium bicarbonate, mid-term 3.5-3.6, passed through second early stage
Sodium formate regulation is added, later stage 4.0-4.5, is adjusted by second of addition sodium bicarbonate, temperature is 33-35 DEG C, the degreasing
Liquor ratio is 100% in the step that eases back, and adds 1.0-1.2% oxalic acid and 1.0-1.5% degreasing agent, pH 3.2-3.3, temperature
For 45-48 DEG C, the time that eases back is 60-65min, and composite tanning agent, liquor ratio 100%, pH 4.2- are used in the retanning step
4.3, retanning temperature is 32-35 DEG C, and the nertralizer used in the water squeezing neutralization procedure is for sodium formate and sodium bicarbonate, pH
5.8-6.0, temperature are 30-32 DEG C, and the neutralization time is 90-100min, and cationic fat liquor is used in the dyeing and fat-liquoring step,
PH is 3.8-4.0, and temperature is 52-55 DEG C, and described draw in soft whitewashing step draws soft process and whitewashing process alternately, wraps altogether
Include 3-4 groups and draw soft whitewashing process.The preparation technology of pigskin head layer upper leather described in the setting has that step is simple, preparation efficiency
Height, requirement of the preparation process to equipment be low and the advantages of energy-conserving and environment-protective.
Further preferred technical scheme is：In the main tanning step formic acid is first added before the tanning agent is added
Sodium, sodium bicarbonate and the ester of phosphoglycerol three, 60-70min is stirred, the amount for sequentially adding the aluminium tanningagent is 2.0-2.2%, described
Glutaraldehyde tanning agent is 6.0-6.5%, and the amount of the glutaraldehyde tanning agent is uniformly divided three parts, is successively separately added into three times, and constantly stir
Mix, the other compositions added afterwards in main tanning, sequentially add sodium formate, antioxidant, tannin, iron powder, mould inhibitor and
Sodium bicarbonate, the scope of the amount of the main tanning auxiliary element is 8.0-12.0%, finally stirs 300-500min.Institute in the setting
Each self-regulation after in stating before the pH of main tanning step, improve the effect of the main tanning so that the leather of tanning is more plentiful,
It is soft.
Further preferred technical scheme is：The mould inhibitor includes TCMTB（2- thiocyanogens methyl vulcanizes benzo thiophene
Azoles）And OIT（Octylisothiazolinone）, the mass ratio of the TCMTB and the OIT dosages is 1:1-1:2.
Further preferred technical scheme is：The amount that second of the sodium bicarbonate adds is 1.5-2.0%, is divided into five
Secondary addition, per minor tick 30-35min.
Further preferred technical scheme is：Carry out out successively after the main tanning step drum take horse stand, pressure water,
Soft and shaving deburring step is got rid of, the bilayer thickness that the leather is controlled in the shaving step is 2.0-2.4mm.
Further preferred technical scheme is：The composite tanning agent used in the retanning step includes acrylate resin tanning
Agent, the Caesalpinia spinosaKuntze vegetable tanning agent and glutaraldehyde tanning agent of improvement, the amount that the acrylate resin tanning agent adds are 2.0-2.5%, institute
The amount for stating the Caesalpinia spinosaKuntze vegetable tanning agent addition of improvement is 2.2-2.5%, and 90-100min is stirred after addition, adds retanning auxiliary afterwards
Composition, it is stirred for 250-300min.
Further preferred technical scheme is：The retanning auxiliary element include toughener, surface-active defrosting compound with
And retanning filler, the sodium bicarbonate regulation pH for being eventually adding 1.0-1.2% is 4.2-4.3, the amount that the retanning auxiliary element adds
For 6.0-8.5%.
Further preferred technical scheme is：Added in the water squeezing neutralization procedure for improving leather machine performance
Vulcanization accelerator, the amount of addition is 1.0-1.2%.
Further preferred technical scheme is：The dyeing and fat-liquoring step is divided into dyeing process and stuffing process, described
Dyestuff, diffusant, migration inhibitor and surface active agent, the diffusant, migration inhibitor and surface are added in dyeing process
The total amount that wetting agent adds is 7.0-9.5%, and the fatting agent added in the stuffing process includes sulfonation artificial oil and sulfiting
Fish oil, the total amount of addition is 6.0-8.0%, finally adjusts pH and stirs.
Further preferred technical scheme is：Dyeing process and stuffing process are all complete described in the dyeing and fat-liquoring step
Formic acid into rear addition 1.5-1.8% as nertralizer, regulation pH is 3.9-4.0, is finally stirred, mixing time 100-
120min。
The present invention provides a kind of without chrome tanning pigskin head layer upper leather preparation technology, and it has, and step is simple, and preparation efficiency is high,
Preparation process is low for equipment requirements, energy-conserving and environment-protective, prepares the advantages of upper leather of gained is wear-resisting, and high temperature resistant is plentiful, soft.
Embodiment
As described below is only presently preferred embodiments of the present invention, non-that the scope of the present invention is defined.
Embodiment：One kind comprises the following steps without chrome tanning pigskin head layer upper leather preparation technology（Since sour skin scytoblastema,
The addition of each operation additive is on the basis of the quality of sour skin）：Pickling eases back, main tanning, degreasing ease back, retanning, in water squeezing
With, dyeing and fat-liquoring and draw soft whitewashing, the following detailed description of the embodiment of the present invention：
Process dosage materials temperature-time remarks
Pickling eases back 10% Nacl, 25 DEG C of liquor ratios 200%
1.0% sulfuric acid 120min pH1.8
The main sodium formate of tanning 1.0%
0.5% sodium bicarbonate 30min pH3.0
The ester 30min of 0.5% phosphoglycerol three
2.0% aluminium tanningagent 60min
2.0% glutaraldehyde tanning agent 60min
2.0% glutaraldehyde tanning agent 60min
2.0% glutaraldehyde tanning agent 90min
1.0% sodium formate 30min pH3.5
1.0% antioxidant 10min
2.0% tannin 30min
2.0% tannin 30min
2.0% tannin 90min
0.2% iron powder
0.1% mould inhibitor 30min（TCMTB：OIT=1:1）
1.5% 30 × 5min of sodium bicarbonate pH4.0
（35 DEG C are warming up to, stirs 300min, then stops drum overnight）
Go out drum to take horse standing, press water to get rid of soft, shaving deburring, bilayer thickness 2.0mm
Degreasing eases back 1.0% oxalic acid, 45 DEG C of liquor ratios 100%
1.0% degreasing agent 60min pH3.2
25 DEG C of washing 30min
Retanning 2.0% acrylic tanning agent, 32 DEG C of 30min liquor ratios 100%
2.0% Caesalpinia spinosaKuntze tanning agent 30min
2.0% glutaraldehyde tanning agent 60min
2.0% toughener 30min
1.0% active defrosting compound 40min
2.0% retanning filler 60min
1.0% 30 × 3min of sodium bicarbonate pH4.2
In water squeezing and 30 DEG C of 1.0% vulcanization accelerator
1.0% sodium formate
2.0% sodium bicarbonate 90min pH5.8
25 DEG C of washing 30min
52 DEG C of dyeing and fat-liquoring dyestuff
1.0% diffusant
2.0% migration inhibitor
4.0% surface active agent 45min
3.0% sulfonation artificial oil
2.0% sulfited fish oil 50min
1.5% 30 × 2min of formic acid pH3.8
Cooling is taken out, and extension, which dries in the air, gets rid of soft, toggling deburring, and continuously soft, deburring dipping storage is drawn in whitewashing three times
Embodiments of the present invention are explained in detail above, but the invention is not restricted to above-mentioned embodiment, in institute
State in technical field those of ordinary skill's possessed knowledge, can also be made on the premise of present inventive concept is not departed from
Various modifications.These are all without creative modification, as long as all by Patent Law in scope of the presently claimed invention
Protection.
Claims (9)
1. it is a kind of without chrome tanning pigskin head layer upper leather preparation technology, comprise the following steps, since sour skin scytoblastema, each operation is added
The addition of thing is on the basis of the quality of sour skin：Pickling eases back, main tanning, degreasing ease back, retanning, water squeezing neutralization, dyeing and fat-liquoring
And draw soft whitewashing, it is characterised in that：The pickling liquor ratio in step that eases back is 200%, adds 1.0-1.2% sulfuric acid, 10-
12% Nacl, pH 1.8-2.3, temperature are 25-28 DEG C, and the time that eases back is 120-150min, is adopted in the main tanning step
With chrome-free tanning agent, including aluminium tanningagent and glutaraldehyde tanning agent, pH scopes divide three phases, early stage 3.2-3.3, by adding for the first time
Add sodium formate and sodium bicarbonate to adjust, mid-term 3.5-3.6, adjusted, later stage 4.0-4.5, led to by second of addition sodium formate
Second addition sodium bicarbonate regulation is crossed, temperature is 33-34 DEG C, and the degreasing liquor ratio in step that eases back is 100%, adds 1.0-
1.2% oxalic acid and 1.0-1.5% degreasing agent, pH 3.2-3.3, temperature are 45-48 DEG C, and the time that eases back is 60-65min,
Composite tanning agent is used in the retanning step, liquor ratio 100%, pH 4.2-4.3, retanning temperature is 32-35 DEG C, the water squeezing
The nertralizer used in neutralization procedure is sodium formate and sodium bicarbonate, pH 5.8-6.0, temperature be 30-32 DEG C, neutralize the time be
90-100min, cationic fat liquor, pH 3.8-4.0 are used in the dyeing and fat-liquoring step, temperature is 52-55 DEG C, the drawing
Soft process and whitewashing process are drawn in soft whitewashing step alternately, draws soft whitewashing process including 3-4 groups altogether；The main tanning step
Sodium formate, sodium bicarbonate and the ester of phosphoglycerol three are first added in rapid before the tanning agent is added, stirs 60-70min, is added successively
The amount for entering the aluminium tanningagent is 2.0-2.2%, and the glutaraldehyde tanning agent is 6.0-6.5%, and the amount of the glutaraldehyde tanning agent is uniformly divided
Three parts, be successively separately added into, and be stirred continuously three times, the other compositions added afterwards in main tanning, sequentially add sodium formate,
Antioxidant, tannin, iron powder, mould inhibitor and sodium bicarbonate, the scope of the amount of the main tanning auxiliary element is 8.0-12.0%,
Finally stir 300-500min.
2. one kind according to claim 1 is without chrome tanning pigskin head layer upper leather preparation technology, it is characterised in that：It is described mould proof
Agent includes TCMTB（2- thiocyanogens methyl vulcanizes benzothiazole）And OIT（Octylisothiazolinone）, the TCMTB with it is described
The mass ratio of OIT dosages is 1:1-1:2.
3. one kind according to claim 1 is without chrome tanning pigskin head layer upper leather preparation technology, it is characterised in that：Described second
The amount that secondary sodium bicarbonate adds is 1.5-2.0%, five additions is divided into, per minor tick 30-35min.
4. one kind according to claim 1 is without chrome tanning pigskin head layer upper leather preparation technology, it is characterised in that：The main tan
Drum is carried out out after step processed successively to take horse standing, press water, get rid of soft and shaving deburring step, institute is controlled in the shaving step
The bilayer thickness for stating leather is 2.0-2.4mm.
5. one kind according to claim 1 is without chrome tanning pigskin head layer upper leather preparation technology, it is characterised in that：The retanning
The composite tanning agent used in step includes acrylate resin tanning agent, the Caesalpinia spinosaKuntze vegetable tanning agent and glutaraldehyde tanning agent of improvement, institute
The amount for stating acrylate resin tanning agent addition is 2.0-2.5%, and the amount that the Caesalpinia spinosaKuntze vegetable tanning agent of the improvement adds is 2.2-
2.5%, 90-100min is stirred after addition, retanning auxiliary element is added afterwards, is stirred for 250-300min.
6. one kind according to claim 5 is without chrome tanning pigskin head layer upper leather preparation technology, it is characterised in that：The retanning
Auxiliary element includes toughener, surface-active defrosting compound and retanning filler, and it is 4.2- to be eventually adding sodium bicarbonate regulation pH
4.3, the amount that the retanning auxiliary element adds is 6.0-8.5%.
7. one kind according to claim 1 is without chrome tanning pigskin head layer upper leather preparation technology, it is characterised in that：The water squeezing
The vulcanization accelerator for improving leather machine performance is added in neutralization procedure, the amount of addition is 1.0-1.2%.
8. one kind according to claim 1 is without chrome tanning pigskin head layer upper leather preparation technology, it is characterised in that：The dyeing
Fatliquoring steps are divided into dyeing process and stuffing process, and dyestuff, diffusant, migration inhibitor and surface are added in the dyeing process
Wetting agent, the total amount that the diffusant, migration inhibitor and surface active agent add are 7.0-9.5%, are added in the stuffing process
The fatting agent entered includes sulfonation artificial oil and sulfited fish oil, and the total amount of addition is 6.0-8.0%, finally adjusts pH and stirs.
9. one kind according to claim 8 is without chrome tanning pigskin head layer upper leather preparation technology, it is characterised in that：The dyeing
Dyeing process described in fatliquoring steps and stuffing process all after the completion of add 1.5-1.8% formic acid and be used as nertralizer, adjusting pH is
3.9-4.0, finally it is stirred, mixing time 100-120min.
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| CN105950793B (en) * | 2016-06-01 | 2018-01-19 | 际华三五一二皮革服装有限公司 | The preparation method of the vegetable tanning clothing leather of goat half |
| CN108588300A (en) * | 2016-08-30 | 2018-09-28 | 晋江市永建皮革制品有限公司 | A kind of production method of improved breathable environment-protective leather |
| CN106544451B (en) * | 2016-12-07 | 2019-01-04 | 兴业皮革科技股份有限公司 | A method of inferior grade wet blue leather is become into high-grade white wet leather |
| IT201700095318A1 (en) * | 2017-08-23 | 2019-02-23 | Db Patents Ltd | METHOD TO SKIN ANIMAL SKIN. |
| CN108424984B (en) * | 2018-03-02 | 2020-09-08 | 旌德君创科技发展有限公司 | Preparation method of sofa leather |
| CN108728593A (en) * | 2018-05-04 | 2018-11-02 | 明新旭腾新材料股份有限公司 | A kind of preparation method of low fogging value eco-car leather |
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| CN101463397B (en) * | 2009-01-14 | 2012-07-11 | 王德振 | Method for manufacturing chromium-free tanning environment protection pigskin shoes |
| CN102827965A (en) * | 2012-09-14 | 2012-12-19 | 兴业皮革科技股份有限公司 | Manufacture method of metal-aldehyde-free vegetable tanning oil wax bag leather |
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Denomination of invention: Preparation process of chrome free tanned pig leather upper layer leather Effective date of registration: 20231227 Granted publication date: 20171117 Pledgee: Bank of Huzhou Co.,Ltd. Pledgor: Haining Home Textile Industrial Base Investment Development Co.,Ltd. Registration number: Y2023980073645 |
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