CN108977595B - Method for preparing real leather luggage leather by aqueous wet method - Google Patents
Method for preparing real leather luggage leather by aqueous wet method Download PDFInfo
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- 239000010985 leather Substances 0.000 title claims abstract description 126
- 238000000034 method Methods 0.000 title claims abstract description 59
- 238000001035 drying Methods 0.000 claims abstract description 39
- 239000011248 coating agent Substances 0.000 claims abstract description 33
- 238000000576 coating method Methods 0.000 claims abstract description 33
- 238000005345 coagulation Methods 0.000 claims abstract description 32
- 230000015271 coagulation Effects 0.000 claims abstract description 32
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 239000002002 slurry Substances 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000000758 substrate Substances 0.000 claims abstract description 24
- 238000005187 foaming Methods 0.000 claims abstract description 23
- 238000005406 washing Methods 0.000 claims abstract description 23
- 238000005507 spraying Methods 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000002344 surface layer Substances 0.000 claims abstract description 15
- 239000004814 polyurethane Substances 0.000 claims abstract description 9
- 229920002635 polyurethane Polymers 0.000 claims abstract description 8
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 7
- 229920005749 polyurethane resin Polymers 0.000 claims description 24
- 239000002562 thickening agent Substances 0.000 claims description 19
- 239000002518 antifoaming agent Substances 0.000 claims description 18
- 238000010409 ironing Methods 0.000 claims description 18
- 239000007787 solid Substances 0.000 claims description 18
- 239000003431 cross linking reagent Substances 0.000 claims description 16
- 238000005498 polishing Methods 0.000 claims description 15
- 239000004088 foaming agent Substances 0.000 claims description 14
- 125000003118 aryl group Chemical group 0.000 claims description 12
- 238000007790 scraping Methods 0.000 claims description 12
- 238000002791 soaking Methods 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 claims description 11
- 230000001070 adhesive effect Effects 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 11
- 239000006260 foam Substances 0.000 claims description 10
- 239000003381 stabilizer Substances 0.000 claims description 10
- 239000000080 wetting agent Substances 0.000 claims description 10
- 210000004207 dermis Anatomy 0.000 claims description 8
- 238000007654 immersion Methods 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- 239000008399 tap water Substances 0.000 claims description 8
- 235000020679 tap water Nutrition 0.000 claims description 8
- 239000000654 additive Substances 0.000 claims description 7
- 125000000129 anionic group Chemical group 0.000 claims description 7
- 239000004890 Hydrophobing Agent Substances 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 230000000996 additive effect Effects 0.000 claims description 6
- 238000005054 agglomeration Methods 0.000 claims description 6
- 230000002776 aggregation Effects 0.000 claims description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- 239000002270 dispersing agent Substances 0.000 claims description 6
- 230000003449 preventive effect Effects 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 4
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 4
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 4
- 210000003491 skin Anatomy 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 2
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 claims description 2
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 2
- 150000003863 ammonium salts Chemical group 0.000 claims description 2
- 125000004069 aziridinyl group Chemical group 0.000 claims description 2
- 239000001110 calcium chloride Substances 0.000 claims description 2
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 239000000839 emulsion Substances 0.000 claims description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 2
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 2
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 2
- 239000012948 isocyanate Substances 0.000 claims description 2
- 150000002513 isocyanates Chemical class 0.000 claims description 2
- 239000004310 lactic acid Substances 0.000 claims description 2
- 235000014655 lactic acid Nutrition 0.000 claims description 2
- 239000004530 micro-emulsion Substances 0.000 claims description 2
- 239000002480 mineral oil Substances 0.000 claims description 2
- 235000010446 mineral oil Nutrition 0.000 claims description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 2
- 230000000704 physical effect Effects 0.000 claims description 2
- 229920000570 polyether Polymers 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 239000011780 sodium chloride Substances 0.000 claims description 2
- 159000000000 sodium salts Chemical class 0.000 claims description 2
- 238000012360 testing method Methods 0.000 claims description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims 1
- 239000003513 alkali Substances 0.000 claims 1
- 238000002156 mixing Methods 0.000 claims 1
- 230000008961 swelling Effects 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract description 10
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 230000002209 hydrophobic effect Effects 0.000 abstract description 4
- 238000005299 abrasion Methods 0.000 abstract description 3
- 238000012546 transfer Methods 0.000 abstract description 3
- 238000011282 treatment Methods 0.000 abstract 1
- 239000002649 leather substitute Substances 0.000 description 19
- 238000004519 manufacturing process Methods 0.000 description 10
- 239000002585 base Substances 0.000 description 7
- 230000035699 permeability Effects 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- 238000004513 sizing Methods 0.000 description 5
- 230000001112 coagulating effect Effects 0.000 description 4
- 230000002500 effect on skin Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- IZUPBVBPLAPZRR-UHFFFAOYSA-N pentachlorophenol Chemical compound OC1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl IZUPBVBPLAPZRR-UHFFFAOYSA-N 0.000 description 2
- 241000321398 Dermatolepis dermatolepis Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
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- 239000002023 wood Substances 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
- 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
- C14C11/00—Surface finishing of leather
- C14C11/003—Surface finishing of leather using macromolecular compounds
-
- 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
- C14C13/00—Manufacture of special kinds or leather, e.g. vellum
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
- Laminated Bodies (AREA)
Abstract
The invention provides a method for preparing leather luggage leather by a water-based wet method, which comprises the steps of leather substrate treatment, coating, coagulation, washing, drying and dry-process veneering; the method ingeniously solves the problems that the waterborne polyurethane foaming material is difficult to adhere to the leather and the leather is easy to mildew, simultaneously solves the problems that the traditional waterborne wet process is easy to crack and bubble when being condensed, and obtains the waterborne leather luggage leather by the modes of spraying condensed liquid at intervals, condensing, washing, drying and dry veneering transfer. The wear-resistant auxiliary agent and the water-based hydrophobic agent are added into the water-based surface layer slurry system, so that the wear resistance and the waterproof performance of the luggage leather are improved. The water-based leather trunk leather obtained by the method has the advantages of safety, environmental protection, soft hand feeling, excellent waterproof performance, difficulty in mildew and abrasion and the like.
Description
Technical Field
The invention belongs to the field of artificial leather production, and particularly relates to a method for preparing real leather luggage leather by a water-based wet method.
Background
Synthetic leather is a plastic product that mimics the composition and structure of natural leather and can be used as a substitute material for it. The impregnated non-woven fabric is usually used as a net layer, and the microporous polyurethane layer is used as a grain layer. The front and back surfaces of the leather are very similar to leather, have certain air permeability and are closer to natural leather than common artificial leather. Synthetic leather occupies a very important position in human daily life, and is widely applied to the aspects of producing bags, clothing, shoes, car ornaments and the like.
In the existing synthetic leather manufacturing, polyurethane resin is diluted and added with wood powder or other filling materials, and the synthetic leather can be produced by adopting a wet method and a dry method according to the performance of the polyurethane resin through the technical processes of permeation, leveling, defoaming, solidification and the like. The dry production process is the earliest developed industrial production method of polyurethane synthetic leather, and the produced synthetic leather has excellent strength and firm bonding, but relatively poor air permeability; the wet production process is a brand new synthesis method developed after the dry process, and the produced synthetic leather has good moisture permeability and air permeability, soft and plump hand feeling and is richer in the style and appearance of natural leather. In any production process, in the production process and the after-finishing process of the synthetic leather, a large amount of chemical additives are used, so that the synthetic leather product contains a certain amount of toxic and harmful substances, such as formaldehyde, benzene, pentachlorophenol, heavy metal ions and the like, and the harmful substances remained in the synthetic leather product can cause harm to human health after long-term use. Along with the improvement of society and living standard, the requirements of people on substances are also improved, and the requirements on healthy and environment-friendly synthetic leather products are also higher.
With the continuous improvement of living standard and environmental protection consciousness, the quality requirement, the environmental protection requirement and the comfort requirement of people on the artificial leather are higher and higher. Although the dermis has great advantages in air permeability, softness and skin-friendly feeling, the construction of a harmonious society, animal protection and environment protection are called for globally, and the dermis pollutes the environment seriously in the production process and the heavy metal content is easy to exceed the standard. In addition, the yield is low in the processing process, so that the manufacturing cost is high, and the product is difficult to be accepted by middle-low-grade consumer groups. At present, the synthetic leather is mainly made of polyurethane resin (PU) and elastic polyvinyl chloride (PVC) sol, the two materials are petroleum products, the biggest defect is that the synthetic leather is not breathable, and the synthetic leather has adverse effects on human skin and respiratory tracts. In addition, in the prior art, the aqueous polyurethane foaming material is difficult to adhere to the leather, and has the problems of easy mildew, easy cracking and bubbling with the leather, and the wear resistance and the waterproof performance are required to be further improved.
Therefore, the manufacturing of the artificial leather with strong air permeability, environmental protection, comfort, softness, wear resistance, water resistance and high quality becomes a research and development task in the field of artificial leather production.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide the method for preparing the leather trunk and bag by the aqueous wet method, and the aqueous leather trunk and bag obtained by the method has the advantages of safety, environmental protection, soft hand feeling, excellent waterproof performance, difficulty in mildewing and abrasion and the like.
In order to achieve the above objects and other related objects, the present invention provides a method for preparing genuine leather luggage leather by an aqueous wet process, comprising the steps of:
1) and (3) treating a dermis substrate: polishing any surface of the leather, soaking the leather in the immersion liquid after polishing, and ironing the leather by an ironing roller after soaking;
2) coating: coating the foaming slurry on the treated leather substrate;
3) and (3) agglomeration: allowing the leather substrate coated with the foaming slurry to pass through a coagulation tank, spraying a coagulation liquid by using a spray gun for coagulation, spraying once every 20-30 seconds for 2-4 times, and standing for coagulation for 5-15 minutes after spraying;
4) washing and drying: washing the redundant solidification liquid through a washing tank, and drying and shaping to obtain the aqueous leather wet method bass;
5) dry-process veneering: scraping and coating aqueous surface layer slurry on release paper, drying, then scraping and coating aqueous bonding material, gluing the aqueous wet-process leather bass prepared in the step 4), drying and stripping to obtain aqueous leather trunk leather;
the polishing in the step 1) is performed by using a skin grinding machine, the ratio of immersion liquid to mildew preventive is 50:1 by tap water, the permeation and mildew prevention effects of the sizing agent are controlled, the leather base material is not completely dried after being ironed by an ironing roller, the humidity of the leather base material is ensured to be 40-50%, and the leather base material is poor because the leather contains a hydrophobic agent, too dry foaming material cannot permeate and peel off, and too much humidity causes too much permeation to influence hand feeling hardening;
the foaming slurry in the step 2) comprises the following raw materials in parts by mass: anion with solid content of 35-45%100 parts of waterborne polyurethane resin, 2.5-3 parts of powder wetting agent, 25-32 parts of lignocellulose, 2-6 parts of dispersing agent, 4.5-6.5 parts of foaming agent, 4.5-6 parts of foam stabilizer and 1.5-2 parts of cross-linking agent, wherein the coating amount is 500-800 g/m2；
The solidification liquid in the step 3) is prepared from the following raw materials in parts by mass: 5-15 parts of demulsifying crosslinking agent and 80-95 parts of tap water; the demulsifying and crosslinking agent is one or more of carbonic acid, lactic acid, citric acid, phosphoric acid, calcium chloride, sodium chloride, ferric sulfate, ferric chloride and aluminum chloride, and the total sprayed coagulation liquid is 100-200 ml;
the water washing in the step 4) is carried out in 2-4 water washing tanks at 40-50 ℃; the drying temperature is 110-140 ℃;
the aqueous surface layer slurry in the step 5) comprises the following raw materials in parts by mass: 100 parts of aromatic waterborne polyurethane resin with the solid content of 30-50%, 0.2-0.8 part of defoaming agent, 2-5 parts of wear-resistant additive, 5-10 parts of waterborne hydrophobing agent, 0.5-2 parts of waterborne thickener, and the coating amount is 110-160 g/m2；
The water-based adhesive is prepared from the following raw materials in parts by mass: 100 parts of aromatic water-based polyurethane resin with the solid content of 35-50 percent, 0.2-0.8 part of defoaming agent, 0.5-2 parts of water-based thickening agent and the coating amount of 120-180 g/m-2；
Further, the powder wetting agent is an ammonium salt or sodium salt powder wetting agent.
Further, the foam stabilizer is a silicone polyether emulsion foam stabilizer.
Further, the foaming agent is an organic silicon modified foaming agent, a lauryl sodium sulfate composite foaming agent or a stearate foaming agent.
Further, the cross-linking agent is aziridine cross-linking agent or isocyanate cross-linking agent.
Further, the defoaming agent is an organic silicon modified defoaming agent or a mineral oil-based defoaming agent.
Furthermore, the wear-resistant auxiliary agent is an organic silicon modified wear-resistant auxiliary agent.
Further, the aqueous hydrophobizing agent is a non-ionic microemulsion.
Further, the aqueous thickener is an associated polyurethane thickener or an alkali-swelling acrylic thickener.
Furthermore, the coating film physical properties of the anionic waterborne polyurethane resin are as follows: under the test conditions that the temperature is (20-25) DEG C and the humidity is (30-50)%, the 100% modulus is (0.8-1.5) MPa, the breaking strength is not less than 25MPa, and the elongation is not less than 800%.
As described above, the method for preparing the leather trunk leather by the aqueous wet method of the invention has the following beneficial effects:
the method ingeniously solves the problems that the waterborne polyurethane foaming material is difficult to adhere to the leather and the leather is easy to mildew, simultaneously solves the problems that the traditional waterborne wet process is easy to crack and bubble when being condensed, and obtains the waterborne leather luggage leather by the modes of spraying condensed liquid at intervals, condensing, washing, drying and dry veneering transfer. The wear-resistant auxiliary agent and the water-based hydrophobic agent are added into the water-based surface layer slurry system, so that the wear resistance and the waterproof performance of the luggage leather are improved.
Detailed Description
The present invention is further illustrated below with reference to specific examples, which are intended to be illustrative only and not to limit the scope of the invention.
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Example 1
A method for preparing leather of a leather trunk bag by an aqueous wet method comprises the following steps:
1) and (3) treating a dermis substrate: polishing any surface of the leather, soaking the leather in an immersion liquid prepared from 50 parts of tap water and 1 part of mildew preventive after polishing, ironing the leather by using an ironing roller after soaking, and ensuring that the leather substrate has 40-50% of humidity after ironing;
2) coating: firstly, preparing foaming slurry: 100 parts of anionic waterborne polyurethane resin with the solid content of 30%, 2.5 parts of powder wetting agent, 25 parts of lignocellulose, 2 parts of dispersing agent, 4.5 parts of foaming agent, 4.5 parts of foam stabilizer and 1.5 parts of cross-linking agent; then coating 500g/m on the dermal substrate treated in the step 1)2The foaming slurry of (1);
3) and (3) agglomeration: allowing the leather substrate coated with the foaming slurry to pass through a coagulation tank, spraying coagulation liquid by a spray gun for coagulation, spraying every 20 seconds for 2 times, wherein the total coagulation liquid sprayed is 100ml, and standing for coagulation for 5 minutes after spraying;
4) washing and drying: washing the redundant coagulating liquid in a washing tank 2 at 40 ℃, and drying and shaping at 140 ℃ to obtain the aqueous leather wet method bass;
5) dry-process veneering: firstly, preparing surface layer slurry: 100 parts of aromatic waterborne polyurethane resin with the solid content of 30 percent, 0.2 part of defoaming agent, 2 parts of wear-resistant additive, 5 parts of waterborne hydrophobing agent and 0.5 part of waterborne thickening agent; preparing an aqueous adhesive: 100 parts of aromatic waterborne polyurethane resin with the solid content of 35 percent, 0.2 part of defoaming agent and 0.5 part of waterborne thickener; then, coating aqueous surface layer sizing agent on release paper in a coating amount of 110g/m2Drying at 120 deg.C, and coating water-scraping adhesive material with scraping amount of 120g/m2And (3) attaching, drying and stripping the aqueous wet-process leather base prepared in the step 4) to obtain the aqueous leather luggage leather.
Example 2
A method for preparing leather of a leather trunk bag by an aqueous wet method comprises the following steps:
1) and (3) treating a dermis substrate: polishing any surface of the leather, soaking the leather in an immersion liquid prepared from 50 parts of tap water and 1 part of mildew preventive after polishing, ironing the leather by using an ironing roller after soaking, and ensuring that the leather substrate has 40-50% of humidity after ironing;
2) coating: firstly, preparing foaming slurry: 100 parts of anionic waterborne polyurethane resin with solid content of 35 percent, 2.8 parts of powder wetting agent and lignocellulose28 parts of dispersing agent, 4 parts of foaming agent, 5 parts of foam stabilizer and 1.6 parts of cross-linking agent; then coating 600g/m on the dermal substrate treated in the step 1)2The foaming slurry of (1);
3) and (3) agglomeration: allowing the leather substrate coated with the foaming slurry to pass through a coagulation tank, spraying coagulation liquid by a spray gun for coagulation, spraying every 20 seconds for 3 times, wherein the total sprayed coagulation liquid is 130ml, and standing for coagulation for 6 minutes after spraying;
4) washing and drying: cleaning redundant coagulating liquid in a water washing tank 2 at 40 ℃, and drying and shaping at 130 ℃ to obtain aqueous leather wet method bass;
5) dry-process veneering: firstly, preparing surface layer slurry: 100 parts of aromatic waterborne polyurethane resin with the solid content of 35 percent, 0.4 part of defoaming agent, 3 parts of wear-resistant additive, 7 parts of waterborne hydrophobing agent and 0.8 part of waterborne thickening agent; preparing an aqueous adhesive: 100 parts of aromatic waterborne polyurethane resin with the solid content of 40 percent, 0.4 part of defoaming agent and 1 part of waterborne thickener; then, coating the water-based surface layer sizing agent on release paper in a coating amount of 120g/m2Drying at 130 deg.C, and coating water-scraping adhesive material with scraping amount of 140g/m2And (3) attaching, drying and stripping the aqueous wet-process leather base prepared in the step 4) to obtain the aqueous leather luggage leather.
Example 3
A method for preparing leather of a leather trunk bag by an aqueous wet method comprises the following steps:
1) and (3) treating a dermis substrate: polishing any surface of the leather, soaking the leather in an immersion liquid prepared from 50 parts of tap water and 1 part of mildew preventive after polishing, ironing the leather by using an ironing roller after soaking, and ensuring that the leather substrate has 40-50% of humidity after ironing;
2) coating: firstly, preparing foaming slurry: 100 parts of anionic waterborne polyurethane resin with the solid content of 40%, 3 parts of powder wetting agent, 30 parts of lignocellulose, 5 parts of dispersing agent, 5 parts of foaming agent, 5.5 parts of foam stabilizer and 1.6 parts of cross-linking agent; then coating 700g/m on the dermal substrate treated in the step 1)2The foaming slurry of (1);
3) and (3) agglomeration: allowing the leather substrate coated with the foaming slurry to pass through a coagulation tank, spraying coagulation liquid by a spray gun for coagulation, spraying once every 30 seconds for 4 times, wherein the total coagulation liquid sprayed is 180ml, and standing for coagulation for 10 minutes after spraying;
4) washing and drying: washing the redundant coagulating liquid in a water washing tank 3 at 40 ℃, and drying and shaping at 110 ℃ to obtain the aqueous leather wet method bass;
5) dry-process veneering: firstly, preparing surface layer slurry: 100 parts of aromatic waterborne polyurethane resin with the solid content of 40%, 0.6 part of defoaming agent, 4 parts of wear-resistant additive, 8 parts of waterborne hydrophobing agent and 1 part of waterborne thickening agent; preparing an aqueous adhesive: 100 parts of aromatic waterborne polyurethane resin with solid content of 45%, 0.6 part of defoaming agent and 1.5 parts of waterborne thickener; then, the water-based surface layer sizing agent is coated on release paper in a blade coating amount of 145g/m2Drying at 210 ℃, and then coating and scraping the water-based adhesive, wherein the scraping amount is 160g/m2And (3) attaching, drying and stripping the aqueous wet-process leather base prepared in the step 4) to obtain the aqueous leather luggage leather.
Example 4
A method for preparing leather of a leather trunk bag by an aqueous wet method comprises the following steps:
1) and (3) treating a dermis substrate: polishing any surface of the leather, soaking the leather in an immersion liquid prepared from 50 parts of tap water and 1 part of mildew preventive after polishing, ironing the leather by using an ironing roller after soaking, and ensuring that the leather substrate has 40-50% of humidity after ironing;
2) coating: firstly, preparing foaming slurry: 100 parts of anionic waterborne polyurethane resin with solid content of 45%, 3 parts of powder wetting agent, 32 parts of lignocellulose, 6 parts of dispersing agent, 6.5 parts of foaming agent, 6 parts of foam stabilizer and 2 parts of cross-linking agent; then coating 800g/m on the dermal substrate treated in the step 1)2The foaming slurry of (1);
3) and (3) agglomeration: allowing the leather substrate coated with the foaming slurry to pass through a coagulation tank, spraying coagulation liquid by a spray gun for coagulation, spraying once every 20 seconds for 4 times, wherein the total sprayed coagulation liquid is 200ml, and standing for coagulation for 15 minutes after spraying;
4) washing and drying: cleaning redundant coagulating liquid in a 50 ℃ rinsing bath 3 groove, and drying and shaping at 140 ℃ to obtain aqueous leather wet method bass;
5) dry-process veneering: firstly, preparing surface layer slurry: 100 parts of aromatic waterborne polyurethane resin with the solid content of 50%, 0.8 part of defoaming agent, 5 parts of wear-resistant additive, 10 parts of waterborne hydrophobing agent and 2 parts of waterborne thickening agent; preparing an aqueous adhesive: 100 parts of aromatic waterborne polyurethane resin with solid content of 50%, 0.8 part of defoaming agent and 2 parts of waterborne thickener; then, the water-based surface layer sizing agent is blade-coated on release paper, and the coating amount is 140g/m2Drying at 130 deg.C, and coating water-scraping adhesive with a scraping amount of 170g/m2And (3) attaching, drying and stripping the aqueous wet-process leather base prepared in the step 4) to obtain the aqueous leather luggage leather.
In conclusion, the method for preparing the leather trunk leather by the aqueous wet method skillfully solves the problems that the aqueous polyurethane foaming material is difficult to adhere to the leather and the leather is easy to mildew, and simultaneously solves the problems that the leather is easy to crack and bubble when being condensed by the traditional aqueous wet method process, and the aqueous leather trunk leather is obtained by spraying the condensed liquid at intervals, condensing, washing, drying and dry veneering transfer. Meanwhile, the wear-resistant auxiliary agent and the water-based hydrophobic agent are added into the water-based surface layer slurry system, so that the wear resistance and the waterproof performance of the luggage leather are improved. The water-based leather trunk leather obtained by the method has the advantages of safety, environmental protection, soft hand feeling, excellent waterproof performance, difficulty in mildew and abrasion and the like.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. The method for preparing the leather of the leather suitcase by the aqueous wet method is characterized by comprising the following steps:
1) and (3) treating a dermis substrate: polishing any surface of the leather, soaking the leather in the immersion liquid after polishing, and ironing the leather by an ironing roller after soaking;
2) coating: coating the foaming slurry on the treated leather substrate;
3) and (3) agglomeration: allowing the leather substrate coated with the foaming slurry to pass through a coagulation tank, spraying a coagulation liquid by using a spray gun for coagulation, spraying once every 20-30 seconds for 2-4 times, and standing for coagulation for 5-15 minutes after spraying;
4) washing and drying: washing the redundant condensed liquid by a washing tank, and drying and shaping to obtain the aqueous leather wet method bass;
5) dry-process veneering: scraping aqueous surface layer slurry on release paper, drying, then scraping aqueous bonding material, attaching with the aqueous leather wet method bass prepared in the step 4), drying and stripping to obtain aqueous leather luggage leather;
the polishing in the step 1) is performed by using a skin polishing machine, and the immersion liquid is prepared by mixing tap water and a mildew preventive in a ratio of 50-60: 1; after the ironing roller is ironed, the leather substrate is ensured to have 30-50% of humidity;
the foaming slurry in the step 2) comprises the following raw materials in parts by mass: 100 parts of anionic waterborne polyurethane resin with the solid content of 35-45%, 2-3 parts of powder wetting agent, 25-35 parts of lignocellulose, 2-5 parts of dispersing agent, 4-8 parts of foaming agent, 4-8 parts of foam stabilizer and 1.5-2 parts of cross-linking agent, wherein the coating amount is 500-800 g/m2；
The coagulation liquid in the step 3) comprises the following raw materials in parts by mass: 5-15 parts of demulsifying crosslinking agent and 80-95 parts of tap water; the demulsifying and crosslinking agent is one or more of carbonic acid, lactic acid, citric acid, phosphoric acid, calcium chloride, sodium chloride, ferric sulfate, ferric chloride and aluminum chloride, and the total sprayed coagulation liquid is 100-200 ml;
the water washing in the step 4) is carried out for 2-4 times by a water washing tank at 40-50 ℃; the drying temperature is 110-140 ℃;
the aqueous surface layer slurry in the step 5) comprises the following raw materials in parts by mass: 100 parts of aromatic waterborne polyurethane resin with the solid content of 30-50%, 0.2-0.8 part of defoaming agent, 2-5 parts of wear-resistant additive and waterborne hydrophobing agent5 to 10 parts of water-based thickening agent, 0.5 to 2 parts of water-based thickening agent, and the coating amount is 110 to 160g/m2(ii) a The water-based adhesive is prepared from the following raw materials in parts by mass: 100 parts of aromatic waterborne polyurethane resin with the solid content of 35-50%, 0.2-0.8 part of defoaming agent and 0.5-2 parts of waterborne thickener, wherein the coating amount of the waterborne adhesive is 120-180g/m2The drying temperature is 110-140 ℃;
the aqueous hydrophobing agent is non-ionic microemulsion, and the coating physical properties of the anionic aqueous polyurethane resin are as follows: under the test conditions that the temperature is 20-25 ℃ and the humidity is 30-50%, the 100% modulus is 0.8-1.5MPa, the breaking strength is not less than 20MPa, and the elongation is not less than 800%.
2. The aqueous wet method for preparing leather trunk leather according to claim 1, wherein: the powder wetting agent is ammonium salt or sodium salt powder wetting agent.
3. The aqueous wet method for preparing leather trunk leather according to claim 1, wherein: the foam stabilizer is a silicone polyether emulsion foam stabilizer.
4. The aqueous wet method for preparing leather trunk leather according to claim 1, wherein: the foaming agent is an organic silicon modified foaming agent, a lauryl sodium sulfate composite foaming agent or a stearate foaming agent.
5. The aqueous wet method for preparing leather trunk leather according to claim 1, wherein: the cross-linking agent is aziridine cross-linking agent or isocyanate cross-linking agent.
6. The aqueous wet method for preparing leather trunk leather according to claim 1, wherein: the defoaming agent is an organic silicon modified defoaming agent or a mineral oil-based defoaming agent.
7. The aqueous wet method for preparing leather trunk leather according to claim 1, wherein: the wear-resistant auxiliary agent is an organic silicon modified wear-resistant auxiliary agent.
8. The aqueous wet method for preparing leather trunk leather according to claim 1, wherein: the water-based thickener is an associated polyurethane thickener or an alkali swelling acrylic acid thickener.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831546A (en) * | 2015-05-05 | 2015-08-12 | 合肥市科天化工有限公司 | Wet method for preparing waterborne polyurethane space leather |
| CN106638016A (en) * | 2016-12-12 | 2017-05-10 | 合肥科天水性科技有限责任公司 | Waterborne polyurethane decorative leather and manufacturing method thereof |
| CN107299539A (en) * | 2017-06-21 | 2017-10-27 | 合肥科天水性科技有限责任公司 | A kind of aqueous polyurethane wet method automobile leather and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104831546A (en) * | 2015-05-05 | 2015-08-12 | 合肥市科天化工有限公司 | Wet method for preparing waterborne polyurethane space leather |
| CN106638016A (en) * | 2016-12-12 | 2017-05-10 | 合肥科天水性科技有限责任公司 | Waterborne polyurethane decorative leather and manufacturing method thereof |
| CN107299539A (en) * | 2017-06-21 | 2017-10-27 | 合肥科天水性科技有限责任公司 | A kind of aqueous polyurethane wet method automobile leather and preparation method thereof |
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