CN113943839A - Low-odor automobile cushion leather - Google Patents
Low-odor automobile cushion leather Download PDFInfo
- Publication number
- CN113943839A CN113943839A CN202111403170.0A CN202111403170A CN113943839A CN 113943839 A CN113943839 A CN 113943839A CN 202111403170 A CN202111403170 A CN 202111403170A CN 113943839 A CN113943839 A CN 113943839A
- Authority
- CN
- China
- Prior art keywords
- leather
- parts
- tanning
- low
- automobile cushion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000010985 leather Substances 0.000 title claims abstract description 94
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 60
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 claims abstract description 24
- YHEWWEXPVKCVFY-UHFFFAOYSA-N 2,6-Dimethoxy-4-propylphenol Chemical compound CCCC1=CC(OC)=C(O)C(OC)=C1 YHEWWEXPVKCVFY-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000002360 preparation method Methods 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 15
- 235000013311 vegetables Nutrition 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 238000002156 mixing Methods 0.000 claims description 31
- 239000007788 liquid Substances 0.000 claims description 25
- 239000011527 polyurethane coating Substances 0.000 claims description 24
- 238000001035 drying Methods 0.000 claims description 20
- 102000004190 Enzymes Human genes 0.000 claims description 16
- 108090000790 Enzymes Proteins 0.000 claims description 16
- 238000000576 coating method Methods 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 15
- 239000011248 coating agent Substances 0.000 claims description 14
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 12
- 239000004367 Lipase Substances 0.000 claims description 11
- 102000004882 Lipase Human genes 0.000 claims description 11
- 108090001060 Lipase Proteins 0.000 claims description 11
- 102000004142 Trypsin Human genes 0.000 claims description 11
- 108090000631 Trypsin Proteins 0.000 claims description 11
- 235000019421 lipase Nutrition 0.000 claims description 11
- 238000002791 soaking Methods 0.000 claims description 11
- 239000012588 trypsin Substances 0.000 claims description 11
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 10
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 10
- 238000005303 weighing Methods 0.000 claims description 10
- 239000002904 solvent Substances 0.000 claims description 9
- AWUCVROLDVIAJX-UHFFFAOYSA-N alpha-glycerophosphate Natural products OCC(O)COP(O)(O)=O AWUCVROLDVIAJX-UHFFFAOYSA-N 0.000 claims description 8
- 241001465754 Metazoa Species 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 7
- AWUCVROLDVIAJX-GSVOUGTGSA-N sn-glycerol 3-phosphate Chemical compound OC[C@@H](O)COP(O)(O)=O AWUCVROLDVIAJX-GSVOUGTGSA-N 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 125000005442 diisocyanate group Chemical group 0.000 claims description 6
- 238000004049 embossing Methods 0.000 claims description 6
- 229920005906 polyester polyol Polymers 0.000 claims description 6
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 6
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 6
- 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 5
- 239000003086 colorant Substances 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 239000012153 distilled water Substances 0.000 claims description 5
- 235000019253 formic acid Nutrition 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000010992 reflux Methods 0.000 claims description 5
- 239000011780 sodium chloride Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 239000004970 Chain extender Substances 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 claims description 4
- 238000005554 pickling Methods 0.000 claims description 4
- 230000036541 health Effects 0.000 abstract description 3
- 241000196324 Embryophyta Species 0.000 description 19
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical group OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 19
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical group CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 16
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 15
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 12
- 150000002009 diols Chemical class 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- -1 polybutylene adipate Polymers 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 description 6
- TUSDEZXZIZRFGC-UHFFFAOYSA-N 1-O-galloyl-3,6-(R)-HHDP-beta-D-glucose Natural products OC1C(O2)COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC1C(O)C2OC(=O)C1=CC(O)=C(O)C(O)=C1 TUSDEZXZIZRFGC-UHFFFAOYSA-N 0.000 description 5
- 239000001263 FEMA 3042 Substances 0.000 description 5
- LRBQNJMCXXYXIU-PPKXGCFTSA-N Penta-digallate-beta-D-glucose Natural products OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-PPKXGCFTSA-N 0.000 description 5
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 5
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 239000012975 dibutyltin dilaurate Substances 0.000 description 5
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 5
- 229920000515 polycarbonate Polymers 0.000 description 5
- 239000004417 polycarbonate Substances 0.000 description 5
- LRBQNJMCXXYXIU-NRMVVENXSA-N tannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-NRMVVENXSA-N 0.000 description 5
- 229920002258 tannic acid Polymers 0.000 description 5
- 229940033123 tannic acid Drugs 0.000 description 5
- 235000015523 tannic acid Nutrition 0.000 description 5
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- XYZZKVRWGOWVGO-UHFFFAOYSA-N Glycerol-phosphate Chemical compound OP(O)(O)=O.OCC(O)CO XYZZKVRWGOWVGO-UHFFFAOYSA-N 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 235000013824 polyphenols Nutrition 0.000 description 4
- 229920001864 tannin Polymers 0.000 description 4
- 235000018553 tannin Nutrition 0.000 description 4
- 239000001648 tannin Substances 0.000 description 4
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 3
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- 229920001610 polycaprolactone Polymers 0.000 description 3
- 239000004632 polycaprolactone Substances 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000012855 volatile organic compound Substances 0.000 description 3
- 102000008186 Collagen Human genes 0.000 description 2
- 108010035532 Collagen Proteins 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 244000137852 Petrea volubilis Species 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 125000003172 aldehyde group Chemical group 0.000 description 2
- 229920001436 collagen Polymers 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000005445 natural material Substances 0.000 description 1
- 239000000419 plant extract Substances 0.000 description 1
- 229920000921 polyethylene adipate Polymers 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009941 weaving 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/58—Seat coverings
-
- 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
- C14B1/44—Mechanical treatment of leather surfaces
-
- 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
- C14B1/44—Mechanical treatment of leather surfaces
- C14B1/56—Ornamenting, producing designs, embossing
-
- 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
- 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
-
- 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
- C14C3/08—Chemical tanning by organic agents
- C14C3/10—Vegetable tanning
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention discloses low-odor automobile cushion leather, and the preparation process comprises four stages of material selection, pretreatment, tanning treatment and after-treatment; the tanning agent used in the tanning treatment process is a vegetable tanning agent, and the vegetable tanning agent comprises the following components in parts by weight: 21.5-32.3 parts of syringyl propane, 9.7-12.9 parts of hydrocinnamone and 6.2-10.6 parts of glutaraldehyde. The tanning treatment of the cushion leather adopts a plant tanning method which is relatively environment-friendly in the market. The automobile cushion leather prepared by the invention has the advantages of full hand feeling, strong real leather feeling and low odor, is very suitable for automobiles or some closed equipment, and avoids the threat of a large amount of harmful gas to the health of human bodies.
Description
Technical Field
The invention relates to the field of automobile accessories, in particular to low-odor automobile cushion leather.
Background
The automobile is a common vehicle in daily life of people, in order to improve comfort, aesthetic property and winter heat retention property, an automobile seat cushion is usually arranged on an automobile seat, leather is formed by tightly weaving natural protein fibers in a three-dimensional space, a special grain layer is arranged on the surface of the leather, and the leather has natural grains and luster and comfortable hand feeling, so the leather is a common material for the existing automobile seat cushion, however, some manufacturers release a large amount of volatile organic compounds such as formaldehyde, benzene and other harmful gases in order to pursue wear resistance and fire resistance, and great threat is caused to the health of human bodies. Therefore, the development of the automobile seat cushion leather with low volatile organic compounds is necessary.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a low-odor automobile cushion leather.
The purpose of the invention is realized by adopting the following technical scheme:
a low-odor automobile cushion leather comprises four stages of material selection, pretreatment, tanning treatment and after-treatment; the tanning agent used in the tanning treatment process is a vegetable tanning agent, and the vegetable tanning agent comprises the following components in parts by weight: 21.5-32.3 parts of syringyl propane, 9.7-12.9 parts of hydrocinnamone and 6.2-10.6 parts of glutaraldehyde.
Preferably, the preparation process comprises the following steps:
step 1, selecting materials:
selecting animal skins with uniform thickness and no cuts on the surfaces as initial original skins according to the requirements of colors and sizes;
step 2, pretreatment:
sequentially soaking, fleshing, unhairing, softening and pickling the selected initial raw leather to obtain pretreated leather;
step 3, tanning:
tanning the pretreated leather by using a solution containing a vegetable tanning agent to obtain tanned leather;
and 4, after finishing:
and (3) sequentially drying, sanding, throwing to soften, coating and embossing the tanned leather to obtain the low-odor automobile cushion leather.
Preferably, in the step 1, the animal skin is cow leather.
Preferably, in the step 2, the soaking is carried out in water at a temperature of 28-35 ℃ for 16-24 hours.
Preferably, in step 2, the fleshing and unhairing processes are both performed using a machine.
Preferably, in the step 2, softening is performed by using an enzyme agent for softening treatment for 1-2 hours; the mass percentage of the enzyme in the enzyme agent is 0.5% -2%, and the enzyme comprises lipase and trypsin in a mass ratio of 1: 0.5-1; the softening process is as follows: immersing the unhaired leather into water, adding lipase at 30-38 ℃ and pH of 5.5-6.0, and softening for 0.5-1 h; and adding trypsin, setting the temperature to be 30-38 ℃, setting the pH to be 7.5-8.0, and softening for 0.5-1 h.
Preferably, in the step 2, the pickling is performed by using an acid solution to perform soaking treatment for 6-8 hours at the temperature of 30-38 ℃; wherein the acid solution is obtained by mixing sodium chloride, sulfuric acid, formic acid and deionized water according to the mass ratio of 6-12: 0.5-1: 0.6-1.2: 100.
Preferably, in the step 3, the tanning treatment temperature is 30-45 ℃ and the tanning treatment time is 3-5 h.
Preferably, in the step 3, the preparation method of the plant tanning agent comprises the following steps:
weighing syringyl propane and hydrocinnamone according to a certain amount, mixing into a solvent, stirring for 0.5-1 h at room temperature, then dropwise adding glutaraldehyde, adjusting the pH of the reaction solution to 6.2-6.8, stirring for 0.5-1 h at room temperature, then heating to 60-70 ℃, refluxing, stirring and mixing for 3-5 h, removing the solvent, and drying under reduced pressure to obtain the plant tanning agent.
Preferably, the solvent is an ethanol solution with the mass fraction of 50% -70%; the mass ratio of the syringyl propane, the hydrocinnamone, the glutaraldehyde to the solvent is 21.5-32.3: 9.7-12.9: 11.2-15.6: 100.
Preferably, in the step 3, the solution containing the plant tanning agent is obtained by uniformly mixing the plant tanning agent, sodium bicarbonate and distilled water according to the mass ratio of 5-10: 0.3-1: 100.
Preferably, in the step 4, the drying is to naturally air-dry the tanned leather or to dry the tanned leather in a drying room at 40-50 ℃.
Preferably, in the step 4, sanding is performed by using sand paper to form a textured surface, wherein the specification of the sand paper is 600-1000 meshes.
Preferably, in the step 4, the step of softening is to shake and soften the sanded leather by using a vibration softening machine.
Preferably, in the step 4, the coating is performed by spraying, and the aqueous polyurethane coating solution is used in the coating process, and comprises the following components in parts by weight: 75-85 parts of polyester polyol, 10-20 parts of glycerophosphate, 45-55 parts of diisocyanate, 0.03-0.3 part of catalyst, 3-8 parts of chain extender and 60-80 parts of water.
Preferably, in the step 4, the thickness of the coating is 20 to 30 μm.
Preferably, the polyester polyol is one of polycarbonate diol, polycaprolactone diol, polybutylene adipate diol and polyethylene adipate diol; the diisocyanate is one of toluene diisocyanate, hexamethylene diisocyanate, diphenylmethane diisocyanate and methylcyclohexyl diisocyanate; the catalyst is one of dibutyltin dilaurate, octyl stannous and triethylenediamine; the chain extender is ethylene glycol or propylene glycol.
Preferably, the preparation method of the aqueous polyurethane coating liquid comprises the following steps:
weighing polyester polyol, glycerophosphate, diisocyanate according to the weight, mixing with a catalyst, reacting for 2-3 h at 65-85 ℃, adding the weighed chain extender, continuing to react for 3-5 h at 65-85 ℃, cooling to 35-40 ℃, adding the weighed water, and uniformly mixing to obtain the waterborne polyurethane coating liquid.
Preferably, in the step 4, the embossing treatment is performed by using a machine after the coating and drying.
Preferably, the thickness of the automobile cushion leather is 0.6-1 mm.
The invention has the beneficial effects that:
the automobile cushion leather prepared by the invention has the advantages of full hand feeling, strong real leather feeling and low odor, is very suitable for automobiles or some closed equipment, and avoids the threat of a large amount of harmful gas to the health of human bodies.
The tanning treatment of the cushion leather adopts a plant tanning method which is relatively environment-friendly in the market. Mainly tanned by using natural plant extracts as a main tanning agent, only contains pure natural animal and plant components, and does not contain aromatic harmful components such as heavy metal, benzene, phenol and the like contained in leather prepared by other tanning processes, so that the volatilization of harmful gases is greatly reduced, and the tanning agent has the characteristic of environmental protection in the real sense.
The plant tanning agent used by the invention is obtained by mixing syringyl propane, hydrocinnamone and glutaraldehyde under certain conditions. Sodium bicarbonate is added to adjust the pH of the liquid. The leather tanned by the plant tanning agent prepared by the invention has better high temperature resistance and better softness.
Compared with the conventional polyurethane coating liquid, the coating liquid used in the invention is a non-toxic aqueous polyurethane coating liquid with less VOCs volatility, and the aqueous polyurethane coating liquid is prepared by using polyester polyol, glycerophosphate and diisocyanate as main components. On the basis of preparing polyurethane coating liquid conventionally, glycerol phosphate is added, wherein one hydroxyl group of glycerol is esterified by phosphoric acid to generate phosphate, and the phosphate is compounded and blended with polyester polyol to participate in the reaction of diisocyanate to prepare synthetic polyurethane. Through detection, the polyurethane synthesized by doping the glycerophosphate ester has better folding fastness and wear resistance compared with the conventional polyurethane.
Detailed Description
For the purpose of more clearly illustrating the present invention and more clearly understanding the technical features, objects and advantages of the present invention, the technical solutions of the present invention will now be described in detail below, but are not to be construed as limiting the implementable scope of the present invention.
The traditional conventional plant tanning method usually takes tannin extract (tannic acid) as a main tanning agent, although tanned leather has better hand feeling and environmental protection, the high temperature resistance is poor, the leather can not be cleaned by hot water, and the color change phenomenon is often generated after the softening treatment, thereby influencing the practicability and the aesthetic property.
The use of tannic acid as a vegetable tanning agent has been on the market for a long time, but has the disadvantages of poor high temperature resistance and low softness of tanned leather, so the present inventors tried experiments using other non-toxic tanning agents to improve the disadvantages of tannic acid as a tanning agent.
Tannin (hydrolyzed tannin) as a tanning agent can form multi-point hydrogen bonds and hydrophobic bonds with skin collagen in leather, and also has a certain colloid synergistic effect, so that the leather has better softness. And after glutaraldehyde is added, the aldehyde group of the glutaraldehyde can be combined with the phenolic hydroxyl group of the tannic acid, so that the stability of the glutaraldehyde can be further enhanced, although the high temperature resistance is improved to a certain extent, the improvement amplitude is small, the performance is still insufficient, and the hand feeling is still hard and soft.
Based on the mechanism, the invention selects the monomer syringyl propane of natural syringyl lignin with smaller molecules to be combined with glutaraldehyde to be used as a tanning agent, finds that the leather obtained by tanning is not ideal in thermal stability and even not as good as tannin, and the inventor guesses that the phenolic hydroxyl group of syringyl propane is too few to form enough multi-point hydrogen bonds with collagen.
Then, the invention tries to use the phenylalkenone (a natural substance extracted from the seeds of the plant fructus psoraleae) which is also a natural extract and contains a plurality of phenolic hydroxyl groups, the phenylalkenone is firstly mixed with syringyl propane and then is used as a tanning agent by combining with glutaraldehyde, and the leather obtained by final tanning is found to have better high temperature resistance and enhanced softness. The inventors hypothesize that it is possible that the aldehyde group of glutaraldehyde is bonded not only to the phenolic hydroxyl groups of syringylpropane and styrofone but also to the double bond in styrofone during the action, thereby enhancing the thermal stability of the tanning agent itself.
The invention is further described below with reference to the following examples.
Example 1
A low-odor automobile cushion leather comprises four stages of material selection, pretreatment, tanning treatment and after-treatment; the tanning agent used in the tanning treatment process is a vegetable tanning agent, and the vegetable tanning agent comprises the following components in parts by weight: 28.6 parts of syringyl propane, 11.2 parts of hydrocinnamone and 8.4 parts of glutaraldehyde.
The preparation process comprises the following steps:
step 1, selecting materials:
selecting animal skins with uniform thickness and no cuts on the surfaces as initial original skins according to the requirements of colors and sizes;
step 2, pretreatment:
soaking the selected initial raw skin in water at the temperature of 30 ℃ for 18h, taking out and draining, and then using mechanical equipment to finish fleshing and unhairing; then placing the mixture into an enzyme agent (comprising lipase and trypsin) with the mass fraction of 1% for softening treatment, wherein the adding sequence of the enzyme is as follows: firstly adding lipase, setting the temperature at 35 ℃ and the pH at 5.8, and softening for 0.8 h; adding trypsin, setting the temperature at 35 ℃ and the pH at 7.7, and softening for 0.8 h; the mass ratio of the lipase to the trypsin is 1: 0.8; immersing the softened leather into an acid solution obtained by mixing sodium chloride, sulfuric acid, formic acid and deionized water according to the mass ratio of 10:0.7:0.9:100, soaking for 7 hours at the temperature of 35 ℃, cleaning with clear water and drying in the air to obtain pretreated leather;
step 3, tanning:
uniformly mixing a plant tanning agent, sodium bicarbonate and distilled water according to the mass ratio of 8:0.5:100, immersing the pre-treated leather, and tanning at the temperature of 40 ℃ for 4 hours to obtain tanned leather;
and 4, after finishing:
naturally airing the tanned leather or drying the tanned leather in a drying room at 40 ℃, using 800-mesh abrasive paper for napping treatment to form a napped surface, using an oscillation staking machine to oscillate and soften the napped leather, using a spraying mode to coat the waterborne polyurethane coating liquid on the surface of the leather, wherein the coating thickness is 25 mu m, and using a machine to carry out embossing treatment after coating and drying to obtain the low-odor automobile cushion leather.
The preparation method of the plant tanning agent comprises the following steps:
weighing syringyl propane and hydrocinnamone, mixing the syringyl propane and the hydrocinnamone into an ethanol solution with the mass fraction of 60%, stirring the mixture for 0.8h at room temperature, dropwise adding glutaraldehyde, adjusting the pH of the reaction solution to 6.5, stirring the mixture for 0.8h at room temperature, heating the mixture to 65 ℃, refluxing, stirring and mixing the mixture for 4h, removing the solvent, and drying the mixture under reduced pressure to obtain the plant tanning agent. Wherein the mass ratio of syringyl propane, hydrocinnamone, glutaraldehyde to the ethanol solution is 25.7:11.4:13.5: 100.
The waterborne polyurethane coating liquid comprises the following components in parts by weight: 80 parts of polycarbonate diol, 15 parts of glycerol phosphate, 50 parts of toluene diisocyanate, 0.1 part of dibutyltin dilaurate, 5 parts of ethylene glycol and 70 parts of water.
The preparation method of the waterborne polyurethane coating liquid comprises the following steps:
weighing polycarbonate diol, glycerophosphate, toluene diisocyanate and dibutyltin dilaurate according to the weight, mixing, reacting for 2-3 h at 65-85 ℃, adding the weighed ethylene glycol, continuing to react for 3-5 h at 65-85 ℃, cooling to 35-40 ℃, adding the weighed water, and mixing uniformly to obtain the waterborne polyurethane coating liquid.
Example 2
A low-odor automobile cushion leather comprises four stages of material selection, pretreatment, tanning treatment and after-treatment; the tanning agent used in the tanning treatment process is a vegetable tanning agent, and the vegetable tanning agent comprises the following components in parts by weight: 21.5 parts of syringyl propane, 9.7 parts of hydrocinnamone and 6.2 parts of glutaraldehyde.
The preparation process comprises the following steps:
step 1, selecting materials:
selecting animal skins with uniform thickness and no cuts on the surfaces as initial original skins according to the requirements of colors and sizes;
step 2, pretreatment:
soaking the selected initial raw skin in water at the temperature of 28 ℃ for 16h, taking out and draining, and then using mechanical equipment to finish fleshing and unhairing; then placing the mixture into an enzyme agent with the mass fraction of 0.5 percent for softening treatment, wherein the adding sequence of the enzyme in the enzyme agent is as follows: firstly adding lipase, setting the temperature at 30 ℃ and the pH at 5.5, and softening for 0.5 h; adding trypsin, setting the temperature at 30 ℃ and the pH at 7.5, and softening for 0.5 h; the mass ratio of the lipase to the trypsin is 1: 0.5; immersing the softened leather into an acid solution obtained by mixing sodium chloride, sulfuric acid, formic acid and deionized water according to the mass ratio of 6:0.5:0.6:100, soaking for 6 hours at the temperature of 30 ℃, cleaning with clear water and drying in the air to obtain pretreated leather;
step 3, tanning:
uniformly mixing a plant tanning agent, sodium bicarbonate and distilled water according to the mass ratio of 5:0.3:100, immersing the pretreated leather, and tanning at the temperature of 30 ℃ for 3 hours to obtain tanned leather;
and 4, after finishing:
naturally airing the tanned leather, using 600-mesh abrasive paper to carry out sanding treatment to form a suede, then using an oscillation softening machine to vibrate and soften the sanded leather, then using a spraying mode to coat the waterborne polyurethane coating liquid on the surface of the leather, wherein the coating thickness is 20 mu m, and using a machine to carry out embossing treatment after coating and drying to obtain the low-odor automobile seat cushion leather.
The preparation method of the plant tanning agent comprises the following steps:
weighing syringyl propane and hydrocinnamone, mixing into an ethanol solution with the mass fraction of 50%, stirring for 0.5h at room temperature, dropwise adding glutaraldehyde, adjusting the pH of the reaction solution to 6.2, stirring for 0.5h at room temperature, heating to 60 ℃, refluxing, stirring and mixing for 3h, removing the solvent, and drying under reduced pressure to obtain the plant tanning agent. Wherein the mass ratio of syringyl propane, hydrocinnamone, glutaraldehyde to the ethanol solution is 21.5:9.7:11.2: 100.
The waterborne polyurethane coating liquid comprises the following components in parts by weight: 75 parts of polycaprolactone dihydric alcohol, 10 parts of glycerol phosphate, 45 parts of diphenylmethane diisocyanate, 0.03 part of octyl stannous, 3 parts of propylene glycol and 60 parts of water.
The preparation method of the waterborne polyurethane coating liquid comprises the following steps:
weighing polycaprolactone dihydric alcohol, glycerophosphate, diphenylmethane diisocyanate and octyl stannous according to the weight, mixing, reacting for 3 hours at 85 ℃, adding the weighed propylene glycol, continuing to react for 5 hours at 85 ℃, cooling to 40 ℃, adding the weighed water, and uniformly mixing to obtain the waterborne polyurethane coating liquid.
Example 3
A low-odor automobile cushion leather comprises four stages of material selection, pretreatment, tanning treatment and after-treatment; the tanning agent used in the tanning treatment process is a vegetable tanning agent, and the vegetable tanning agent comprises the following components in parts by weight: 32.3 parts of syringyl propane, 12.9 parts of hydrocinnamone and 10.6 parts of glutaraldehyde.
The preparation process comprises the following steps:
step 1, selecting materials:
selecting animal skins with uniform thickness and no cuts on the surfaces as initial original skins according to the requirements of colors and sizes;
step 2, pretreatment:
soaking the selected initial raw skin in water at the temperature of 35 ℃ for 24 hours, taking out and draining, and then using mechanical equipment to finish fleshing and unhairing; then placing the mixture into an enzyme agent with the mass fraction of 2% for softening treatment, wherein the adding sequence of the enzyme in the enzyme agent is as follows: firstly, adding lipase, setting the temperature to be 38 ℃ and the pH value to be 6.0, and softening for 1 h; adding trypsin, setting the temperature at 38 ℃ and the pH at 8.0, and softening for 1 h; the mass ratio of the lipase to the trypsin is 1: 1; then immersing the softened leather into an acid liquor obtained by mixing sodium chloride, sulfuric acid, formic acid and deionized water according to the mass ratio of 12:1:1.2:100, soaking for 8 hours at 38 ℃, cleaning with clear water and drying in the air to obtain pretreated leather;
step 3, tanning:
uniformly mixing a plant tanning agent, sodium bicarbonate and distilled water according to a mass ratio of 10:1:100, immersing the pretreated leather, and tanning at 45 ℃ for 5 hours to obtain tanned leather;
and 4, after finishing:
and (2) drying the tanned leather in a drying room at 50 ℃, using 1000-mesh abrasive paper for sanding to form a suede, vibrating and softening the sanded leather by using a vibrating softening machine, coating the water-based polyurethane coating liquid on the surface of the leather in a spraying mode, wherein the coating thickness is 30 mu m, and embossing by using a machine after coating and drying to obtain the low-odor automobile cushion leather.
The preparation method of the plant tanning agent comprises the following steps:
weighing syringyl propane and hydrocinnamone, mixing into 70% ethanol solution, stirring at room temperature for 1h, dropwise adding glutaraldehyde, adjusting the pH of the reaction solution to 6.8, stirring at room temperature for 1h, heating to 70 ℃, refluxing, stirring and mixing for 5h, removing the solvent, and drying under reduced pressure to obtain the plant tanning agent. Wherein the mass ratio of syringyl propane, hydrocinnamone, glutaraldehyde to the ethanol solution is 32.3:12.9:15.6: 100.
The waterborne polyurethane coating liquid comprises the following components in parts by weight: 85 parts of polybutylene adipate glycol, 20 parts of glycerol phosphate, 55 parts of hexamethylene diisocyanate, 0.3 part of triethylene diamine, 8 parts of propylene glycol and 80 parts of water.
The preparation method of the waterborne polyurethane coating liquid comprises the following steps:
weighing polybutylene adipate glycol, glycerophosphate, hexamethylene diisocyanate and triethylene diamine according to the weight, mixing, reacting for 2-3 h at the temperature of 65-85 ℃, adding the weighed propylene glycol, continuing to react for 3-5 h at the temperature of 65-85 ℃, cooling to 35-40 ℃, adding the weighed water, and mixing uniformly to obtain the waterborne polyurethane coating liquid.
Comparative example 1
A low-odor automobile cushion leather is prepared by the same process as in example 1, except that:
the tanning agent used in the tanning treatment process comprises the following components in parts by weight: 28.6 parts tannic acid and 8.4 parts glutaraldehyde.
Comparative example 2
A low-odor automobile cushion leather is prepared by the same process as in example 1, except that:
the tanning agent used in the tanning treatment process comprises the following components in parts by weight: 28.6 parts syringyl propane and 8.4 parts glutaraldehyde.
Comparative example 3
A low-odor automobile cushion leather is prepared by the same process as in example 1, except that:
the waterborne polyurethane coating liquid comprises the following components in parts by weight: 95 parts of polycarbonate diol, 50 parts of toluene diisocyanate, 0.1 part of dibutyltin dilaurate, 5 parts of ethylene glycol and 70 parts of water.
The preparation method of the waterborne polyurethane coating liquid comprises the following steps:
weighing polycarbonate diol, toluene diisocyanate and dibutyltin dilaurate according to the weight, mixing, reacting for 2-3 h at 65-85 ℃, adding the weighed ethylene glycol, continuing to react for 3-5 h at 65-85 ℃, cooling to 35-40 ℃, adding the weighed water, and uniformly mixing to obtain the waterborne polyurethane coating liquid.
In order to more clearly illustrate the content of the invention, a series of detection comparisons were performed on the automobile cushion leather with the thickness of 1mm prepared in examples 1 to 3 and comparative examples 1 to 3. The softness is detected by using a leather softness tester; the shrinkage temperature was measured according to the standard QB/T2713-2005 method; the folding fastness is measured according to the method of Standard QB/T3812.9-1999; the detection method of formaldehyde and benzene comprises the following steps: cutting automobile cushion leather into pieces with the length multiplied by the width of 5cm multiplied by 5cm, placing the pieces in a closed 5L box, replacing air in the box with nitrogen, placing the nitrogen in an oven at 60 ℃ for baking for 1h, and then detecting the volatile contents of benzene and formaldehyde by using a detector; the abrasion resistance was measured according to the method of standard GB/T21196-2007, and the results are shown in Table 1 below:
TABLE 1 test results of automobile cushion leather
| Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| Softness (mm) | 8.5 | 8.1 | 8.2 | 6.3 | 7.5 | 8.2 |
| Shrinkage temperature (. degree.C.) | 107 | 98 | 105 | 85 | 76 | 103 |
| Amount of Formaldehyde detected (. mu.g/m)3） | ＜10 | ＜10 | ＜10 | ＜10 | ＜10 | ＜10 |
| Benzene detected amount (. mu.g/m)3） | Not detected out | Not detected out | Not detected out | Not detected out | Not detected out | Not detected out |
| Fastness to folding (ten thousands times) | ＞10 | ＞10 | ＞10 | ＞10 | ＞10 | ＜10 |
| Abrasion resistance (times) | ＞5000 | ＞5000 | ＞5000 | ＞5000 | ＞5000 | ＜5000 |
As can be seen from Table 1, the automobile cushion leather prepared in examples 1-3 has better softness, higher shrinkage temperature and formaldehyde detection amount lower than 10 [ mu ] g/m3Benzene is not detected, the folding fastness is higher, the wear resistance is better, and the leather can be used as low-odor and high-quality automobile cushion leather.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A low-odor automobile cushion leather is characterized in that the preparation process comprises four stages of material selection, pretreatment, tanning treatment and after-treatment; the tanning agent used in the tanning treatment process is a vegetable tanning agent, and the vegetable tanning agent comprises the following components in parts by weight: 21.5-32.3 parts of syringyl propane, 9.7-12.9 parts of hydrocinnamone and 6.2-10.6 parts of glutaraldehyde.
2. The low-odor automobile cushion leather as claimed in claim 1, wherein the preparation process comprises the following steps:
step 1, selecting materials:
selecting animal skins with uniform thickness and no cuts on the surfaces as initial original skins according to the requirements of colors and sizes;
step 2, pretreatment:
sequentially soaking, fleshing, unhairing, softening and pickling the selected initial raw leather to obtain pretreated leather;
step 3, tanning:
tanning the pretreated leather by using a solution containing a vegetable tanning agent to obtain tanned leather;
and 4, after finishing:
and (3) sequentially drying, sanding, throwing to soften, coating and embossing the tanned leather to obtain the low-odor automobile cushion leather.
3. The low-odor automobile cushion leather as claimed in claim 1, wherein in the step 2, the soaking is carried out for 16-24 hours in water with a temperature of 28-35 ℃.
4. The low-odor automobile cushion leather as claimed in claim 1, wherein in the step 2, softening is performed by using an enzyme agent for 1-2 h; the mass percentage of the enzyme in the enzyme agent is 0.5% -2%, and the enzyme comprises lipase and trypsin in a mass ratio of 1: 0.5-1; the softening process is as follows: immersing the unhaired leather into water, adding lipase at 30-38 ℃ and pH of 5.5-6.0, and softening for 0.5-1 h; and adding trypsin, setting the temperature to be 30-38 ℃, setting the pH to be 7.5-8.0, and softening for 0.5-1 h.
5. The low-odor automobile cushion leather as claimed in claim 1, wherein in the step 2, the pickling is performed by using an acid solution at 30-38 ℃ for 6-8 h; wherein the acid solution is obtained by mixing sodium chloride, sulfuric acid, formic acid and deionized water according to the mass ratio of 6-12: 0.5-1: 0.6-1.2: 100.
6. The low-odor automobile cushion leather as claimed in claim 1, wherein in the step 3, the tanning treatment temperature is 30-45 ℃ and the tanning treatment time is 3-5 h.
7. The low-odor automobile cushion leather according to claim 1, wherein in the step 3, the plant tanning agent is prepared by the following steps:
weighing syringyl propane and hydrocinnamone according to a certain amount, mixing into a solvent, stirring for 0.5-1 h at room temperature, then dropwise adding glutaraldehyde, adjusting the pH of the reaction solution to 6.2-6.8, stirring for 0.5-1 h at room temperature, then heating to 60-70 ℃, refluxing, stirring and mixing for 3-5 h, removing the solvent, and drying under reduced pressure to obtain the plant tanning agent.
8. The low-odor automobile cushion leather as claimed in claim 1, wherein in the step 3, the solution containing the plant tanning agent is obtained by uniformly mixing the plant tanning agent, sodium bicarbonate and distilled water according to a mass ratio of 5-10: 0.3-1: 100.
9. The low-odor automobile cushion leather as claimed in claim 1, wherein in the step 4, coating is performed by spraying, and aqueous polyurethane coating liquid is used in the coating process, and the aqueous polyurethane coating liquid comprises the following components in parts by weight: 75-85 parts of polyester polyol, 10-20 parts of glycerophosphate, 45-55 parts of diisocyanate, 0.03-0.3 part of catalyst, 3-8 parts of chain extender and 60-80 parts of water.
10. The low-odor automobile cushion leather as claimed in claim 1, wherein in the step 4, the leather is embossed by a machine after being painted and dried.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101824154A (en) * | 2010-04-23 | 2010-09-08 | 北京嘉禾木科技有限公司 | Preparation method of carboxylated lignin |
| CN102690902A (en) * | 2011-03-21 | 2012-09-26 | 赣州华坚国际鞋城有限公司 | Leather tanning technology |
| CN107630114A (en) * | 2017-11-07 | 2018-01-26 | 江门市蓬江区珠江皮革实业有限公司 | It is a kind of to remove from office production technology without chrome tanning automobile cushion |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101824154A (en) * | 2010-04-23 | 2010-09-08 | 北京嘉禾木科技有限公司 | Preparation method of carboxylated lignin |
| CN102690902A (en) * | 2011-03-21 | 2012-09-26 | 赣州华坚国际鞋城有限公司 | Leather tanning technology |
| CN107630114A (en) * | 2017-11-07 | 2018-01-26 | 江门市蓬江区珠江皮革实业有限公司 | It is a kind of to remove from office production technology without chrome tanning automobile cushion |
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