CN111020071A - Steering wheel curtain coating composite leather and preparation method thereof - Google Patents
Steering wheel curtain coating composite leather and preparation method thereof Download PDFInfo
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- CN111020071A CN111020071A CN201911378266.9A CN201911378266A CN111020071A CN 111020071 A CN111020071 A CN 111020071A CN 201911378266 A CN201911378266 A CN 201911378266A CN 111020071 A CN111020071 A CN 111020071A
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C11/00—Surface finishing of leather
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- 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
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Manufacturing & Machinery (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention relates to a preparation method of a steering wheel, in particular to a steering wheel curtain coating composite leather and a preparation method thereof, and belongs to the field of automobile parts. The method comprises the following steps: a. selecting a leather blank with the thickness of 1.0-1.2mm, coating a layer of automotive interior adhesive on the front surface of the leather blank, drying to form an adhesion layer, spraying aqueous polyurethane slurry on the adhesion layer to cover the whole leather surface, drying, and performing finishing procedures such as leather polishing to obtain the leather blank with a curtain coating layer, which can be directly used as a steering wheel curtain coating composite leather product. The appearance of the steering wheel curtain coating composite leather product obtained by the method is close to flawless, the elasticity direction and the leather tearing strength depend on the elasticity size, the elasticity direction and the tearing strength of the leather blank, the original characteristics of the leather are reserved to the maximum extent, the utilization rate of the leather is increased, the biophysical index of the leather is met, and the use economic value is greatly improved.
Description
Technical Field
The invention relates to a preparation method of a steering wheel, in particular to a steering wheel curtain coating composite leather and a preparation method thereof, and belongs to the field of automobile parts.
Background
The automobile steering wheel is a device for controlling the automobile driving direction by a driver, people pursue pleasant driving feeling along with the development of the automobile industry, and leather which is full, natural and elastic is widely applied to the automobile steering wheel, so that leather for an automobile leather steering wheel is produced.
The leather for the steering wheel in the market at present generally takes the first layer and the second layer of the cowhide as main materials, because the cowhide is a natural material, position difference and natural disability exist, some flaws (loose surfaces, second-layer orange peel lines and the like) which cannot be covered and avoided exist after processing, the elastic direction is not uniform and inconsistent, the tearing strength does not reach the standard, the effective utilization of resources is seriously influenced (the utilization rate is about 30-50%), the resources are greatly wasted, and the production cost is high.
Disclosure of Invention
The invention provides a preparation method of steering wheel curtain coating composite leather aiming at the defect of natural flaws of leather in the prior art, and the method enables surface damage of leather fabric to be reduced, improves the utilization rate of the leather, improves the position difference of the natural material of the leather, improves the uniformity of the whole piece of cowhide, improves the utilization rate of the leather, reduces the waste of the leather material and improves the economic value of the leather.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a kind of steering wheel drenches curtain compound leather, the composite leather of curtain drenches the curtain sequentially from top to bottom and is a coating layer, drenches the curtain layer, the adhesion layer and leather embryo, coating layer, drenches the curtain layer, adhesion layer and leather embryo to compound as an organic whole; the curtain coating layer is formed by drying the aqueous polyurethane slurry. The curtain coating layer is used for covering the original flaws on the surface of the leather, so that high-quality available leather without flaws or with few flaws can be obtained, and the two sides of the curtain coating layer are provided with surface layers which can be used for leather finishing. The coating layer can adjust the slurry formula according to the requirements of customers, so that decorative coatings with various colors and rich patterns are formed on the surface of the leather blank.
The curtain-spraying steering wheel curtain-spraying composite leather not only meets the requirements of customers on physical properties, but also covers the flaws on the surface of the original leather to the maximum extent, so that the limited resource of the leather is more fully and effectively utilized, the economic use value of the leather is improved, the resource waste is reduced, and the profit margin of the leather is increased.
Preferably, the leather blank is cowhide, the coating layer is formed by coating decorative paint, and the subsequent layer is automotive interior glue.
Preferably, the thickness of the steering wheel curtain coating composite leather is 1.2-1.5 mm.
The preparation method of the steering wheel curtain-spraying composite leather comprises the following steps: a. selecting a leather blank with the thickness of 1.0-1.2mm, coating a layer of automotive interior adhesive on the front surface of the leather blank, drying to form an adhesion layer, spraying aqueous polyurethane slurry on the adhesion layer to cover the whole leather surface, drying, and performing finishing procedures such as leather polishing to obtain the leather blank with a curtain coating layer, which can be directly used as a steering wheel curtain coating composite leather product.
The curtain layer is used for covering the original flaws on the surface of the leather to obtain usable high-quality leather without flaws or with few flaws, the curtain layer is formed by coating a surface layer with the thickness of only 30-40 mu m by a conventional coating layer through a water-soluble amphoteric material, and the curtain layer is added on the surface of the leather blank to increase the thickness of the final whole leather coating layer (the part added outside the leather blank layer) to be about 100-200 mu m, and can be directly used as the surface layer or a part for leather coating.
The appearance of the steering wheel curtain coating composite leather product obtained by the method is close to flawless, the elasticity direction and the leather tearing strength depend on the elasticity size, the elasticity direction and the tearing strength of the leather blank, the original characteristics of the leather are reserved to the maximum extent, the utilization rate of the leather is increased, the biophysical index of the leather is met, and the use economic value is greatly improved.
Preferably, the aqueous polyurethane slurry comprises the following components in parts by weight: 0-10 parts of wood powder, 0.5-2.5 parts of anionic surfactant, 1-3 parts of nonionic surfactant, 2-8 parts of solvent, 5-8 parts of color paste, 0.2-1.0 part of flatting agent, 0.5-1 part of defoaming agent and 100 parts of polyurethane resin. The components of the aqueous polyurethane slurry are convenient to prepare, and the aqueous polyurethane slurry has little pollution to the environment in the operation process and no harm to personnel.
Preferably, the solvent is selected from dimethyl sulfoxide (DMSO), N-Dimethylformamide (DMF).
Preferably, the method further comprises the steps of:
b. the leather blank with the curtain coating layer is subjected to leather measuring after leather surface grinding, softening, repairing and trimming treatment to obtain the curtain coating leather blank for direct production;
c. and (3) performing surface roller coating, spraying, embossing, top slurry trimming inspection and other treatments on the curtain coating leather blank obtained in the last step, and then performing leather measuring and warehousing, wherein the roller coating, spraying and top slurry procedures are implemented by adopting decorative coating.
Preferably, the decorative coating comprises the following components in parts by weight: 200 parts of water, 500 parts of polyurethane, 100 parts of acrylic resin, 180 parts of pigment, 80-130 parts of a hand feeling agent, 20-60 parts of a flatting agent and 150 parts of a cross-linking agent. The formula of the decorative coating can be adjusted according to the requirements of customers so as to obtain special colors and patterns on the surface of the leather fabric.
In the main raw materials of the aqueous polyurethane slurry, the curtain coating layer can be replaced, and the curtain coating layer can be used as a surface composite layer and can simultaneously extend to the technologies of microfiber, carbon fiber, glass fiber and the like to realize the increase of the covering of the surface layer.
A. Polyurethane resin: the resin is usually common wet resin, special for grinding leather, special for impregnation, cold-resistant resin and the like, and the modulus (100%) of the resin is different from 2.0MPa to 30.0 MPa. According to the hardness of the leather blank, high and low modulus grade resin is selected, and a large amount of wood powder and other fillers are often added due to small pores and high density of single-coated bass, so when the product is used in a cold region, the cold resistance of the product needs to be fully considered, and the resin with good cold resistance is adopted;
B. wood powder: the single coating bass uses a certain amount of wood powder, which can reduce the product cost and play a role of a framework in the solidification process, the wood powder of different models and manufacturers has different expansion coefficients, so that the viscosity values are different under the condition of the same material, the quality and the corresponding cost of the product are directly influenced, and the fineness requirement of the wood powder generally reaches more than 400 meshes;
C. anionic surfactant (AR-70): also known as fast penetrants, and have hydrophilic properties. The method mainly accelerates the exchange speed of DMF and water, improves the production speed and simultaneously makes the foam holes fine and dense. The anionic surfactant can generate a spherical cellular structure, and increase resilience, air permeability and moisture permeability. The addition amount is generally between 0.5 and 2.5 percent of the total weight of the raw materials, if the addition amount is more, the coating is easy to roll back, and the smoothness is reduced;
D. nonionic surfactant (SD-80): the hydrophobic nature is provided, the solidification speed of the surface can be delayed, so that the internal DMF and water can be exchanged more quickly, a needle-shaped cellular structure can be generated, the adding amount is 1-3%, and the excessive production speed is influenced;
E. solvent: the polyurethane resin is used for dissolving and diluting the polyurethane resin, the viscosity of the slurry is adjusted by directly matching the polyurethane resin, and when the using amount is large, the solidification speed is increased and the cell structure is enlarged in the solidification process;
F. color paste: selecting a product of a single solvent system, and generally adding the product in an amount of 5-8%;
E. some leveling agents and defoaming agents can be added as appropriate.
The invention has the beneficial effects that: the steering wheel curtain coating composite leather keeps the texture of leather, improves the influence of the inherent flaws of the leather on the use of the leather, greatly improves the position difference of the original natural leather, more mainly enables the original leather to be prepared into two leathers, improves the added value of the leather, also improves the utilization rate of the leather (from 30-38% of the original natural leather to 50% -65%), effectively reduces the cost of the leather, and has great market competitiveness.
Detailed Description
The technical solution of the present invention will be further specifically described below by way of specific examples. It is to be understood that the practice of the invention is not limited to the following examples, and that any variations and/or modifications may be made thereto without departing from the scope of the invention.
In the present invention, all parts and percentages are by weight, unless otherwise specified, and the equipment and materials used are commercially available or commonly used in the art. The methods in the following examples are conventional in the art unless otherwise specified.
Nonionic surfactant, model SD-80;
anionic surfactant, type AR-70;
automotive interior adhesive, moroplast B970, hangao automotive interior adhesive, germany.
Examples 1 to 4
A composite leather for the curtain-spraying of steering wheel is composed of a coating layer, a curtain-spraying layer, an adhesive layer and a leather blank, which are sequentially arranged from top to bottom. The coating layer comprises a bottom coating layer positioned on the surface of the leather blank and a top coating layer covered on the bottom coating layer. The leather blank is cowhide, the coating layer is a water-based polyurethane coating, and the thickness of the finished product of the steering wheel curtain-showering composite leather is controlled to be 1.2-1.5 mm.
Selecting a skin embryo: the method is characterized in that the environment-friendly cowhide (comprising a first layer and a second layer) meeting the requirements of the automobile interior in the current market is selected, the thickness is generally 1.0-1.2mm, the thickness is determined according to the final requirements of customers, the leather has the longitudinal and latitudinal directions (the elastic direction), the requirement of the elastic direction of the customers (the tearing strength is defined according to the final product of the leather) is ensured to be met when the leather is used, the requirement of the elastic direction of the customers is generally not less than 1.2 times of the customer standard, and the leather meets the environmental protection standards (volatile matters, smell and.
The preparation method of the steering wheel curtain coating composite leather comprises the following steps:
a. coating a curtain coating layer: selecting a leather blank with the thickness of 1.0-1.2mm, coating a layer of automotive interior adhesive on the front surface of the leather blank, drying to form an adhesion layer, coating the aqueous polyurethane slurry shown in the table 1 on the adhesion layer to cover the whole leather surface, drying, performing conventional leather polishing and other finishing procedures, and forming a curtain coating layer.
The automotive interior adhesive can be environment-friendly adhesive for automotive interiors or environment-friendly solid hot melt adhesive.
b. And (4) carrying out leather measurement on the semi-finished product obtained in the last step after leather surface grinding, softening, repairing and trimming treatment to obtain the curtain coating leather blank which can be directly produced.
c. And (4) performing surface roller coating, spraying, embossing, top pulp trimming inspection and other treatments on the leather blank obtained in the last step, and then performing leather measuring and warehousing. Wherein, the procedures of roller coating, spraying and slurry jacking are implemented by adopting decorative paint, and the formula of the decorative paint is shown in Table 2. In the above method, steps b and c may be performed using a conventional leather finishing process.
TABLE 1 aqueous polyurethane slurry formulation (unit: kg)
| Components | Example 1 | Example 2 | Example 3 | Example 4 |
| Wood powder | 9 | 8 | 10 | 8 |
| Anionic surfactant AR-70 | 2.5 | 2 | 1.5 | 0.5 |
| Nonionic surfactant SD-80 | 3 | 2 | 2 | 1 |
| Solvent (DMSO) | 20 | 25 | 20 | 25 |
| Color paste | 5 | 6 | 8 | 8 |
| Leveling agent | 0.2 | 0.3 | 0.5 | 0.5 |
| Defoaming agent | 0.5 | 0.5 | 1 | 1 |
| Resin composition | 100 | 100 | 100 | 100 |
TABLE 2 decorative paint formula (unit: kg)
| Components | Example 1 | Example 2 | Example 3 | Example 4 |
| Water (W) | 150 | 150 | 180 | 150 |
| Polyurethane | 450 | 480 | 450 | 500 |
| Acrylic resin | 100 | 120 | 140 | 150 |
| Pigment (I) | 180 | 120 | 100 | 120 |
| Hand feeling agent | 80 | 80 | 100 | 100 |
| Leveling agent | 20 | 20 | 40 | 30 |
| Crosslinking agent | 100 | 100 | 120 | 120 |
When the proportion of polyurethane is large, the surface coating layer has strong plastic feeling, poor real leather feeling, strong physical property and high cost. The steering wheel curtain coating composite leather produced in each example was subjected to a sweat test of 2000 rubs according to standard ISO11640, the results of which are shown in table 3.
TABLE 3
Meanwhile, according to the national standard QB/T27032005, the steering wheel curtain coating composite leather prepared by the invention and the existing leather (the cowhide two-layer is taken as an example (the physical property of the common first-layer leather is better than that of the second-layer leather) are subjected to the following detection of the tearing and the elongation, and the test results are shown in the table 4.
TABLE 4
| Item | Maximum tearing force N | Tear Strength Kgf/cm2 | Maximum force elongation% | Elongation after fracture% |
| Warp (invention) | 371.2 | 55.28 | 36.300 | 15.395 |
| Weft (invention) | 370.3 | 56.90 | 35.000 | 15.147 |
| Warp (original leather) | 242.5 | 42.42 | 40.300 | 7.003 |
| Weft (original leather) | 211 | 38.64 | 50.100 | 15.4 |
The preparation method of the steering wheel curtain coating composite leather can be widely applied to other products such as shoe upper leather, case and bag and other decorative leather, so that the original natural material is uncontrollable in multiple aspects and becomes a controllable range. Production optimization and standardized operation are utilized.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (8)
1. The utility model provides a steering wheel drenches compound leather of curtain which characterized in that: the steering wheel curtain coating composite leather sequentially comprises a coating layer, a curtain coating layer, a bonding layer and a leather blank from top to bottom, wherein the coating layer, the curtain coating layer, the bonding layer and the leather blank are compounded into a whole; the curtain coating layer is formed by drying the aqueous polyurethane slurry.
2. The steering wheel curtain coating composite leather according to claim 1, wherein: the leather blank is made of cowhide, the coating layer is formed by coating decorative paint, and the subsequent layer is automotive interior glue.
3. The steering wheel curtain coating composite leather according to claim 1, wherein: the thickness of the steering wheel curtain coating composite leather is 1.2-1.5 mm.
4. The preparation method of the steering wheel curtain coating composite leather of claim 1, which is characterized by comprising the following steps: a. selecting a leather blank with the thickness of 1.0-1.2mm, coating a layer of automotive interior adhesive on the front surface of the leather blank, drying to form an adhesion layer, spraying aqueous polyurethane slurry on the adhesion layer to cover the whole leather surface, drying, and performing finishing procedures such as leather polishing to obtain the leather blank with a curtain coating layer, which can be directly used as a steering wheel curtain coating composite leather product.
5. The method of claim 4, wherein: the waterborne polyurethane slurry comprises the following components in parts by weight: 0-10 parts of wood powder, 0.5-2.5 parts of anionic surfactant, 1-3 parts of nonionic surfactant, 2-8 parts of solvent, 5-8 parts of color paste, 0.2-1.0 part of flatting agent, 0.5-1 part of defoaming agent and 100 parts of polyurethane resin.
6. The method of claim 4, wherein: the solvent is selected from dimethyl sulfoxide (DMSO), N-Dimethylformamide (DMF).
7. The method of claim 4, wherein: the method further comprises the following steps:
b. the leather blank with the curtain coating layer is subjected to leather measuring after leather surface grinding, softening, repairing and trimming treatment to obtain the curtain coating leather blank for direct production;
c. and (3) performing surface roller coating, spraying, embossing, top slurry trimming inspection and other treatments on the curtain coating leather blank obtained in the last step, and then performing leather measuring and warehousing, wherein the roller coating, spraying and top slurry procedures are implemented by adopting decorative coating.
8. The method of claim 7, wherein: the decorative coating comprises the following components in parts by weight: 200 parts of water, 500 parts of polyurethane, 100 parts of acrylic resin, 180 parts of pigment, 80-130 parts of a hand feeling agent, 20-60 parts of a flatting agent and 150 parts of a cross-linking agent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911378266.9A CN111020071A (en) | 2019-12-27 | 2019-12-27 | Steering wheel curtain coating composite leather and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911378266.9A CN111020071A (en) | 2019-12-27 | 2019-12-27 | Steering wheel curtain coating composite leather and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113278743A (en) * | 2021-05-18 | 2021-08-20 | 辽宁富新新材料有限公司 | Steering wheel leather resistant to heat shrinkage and preparation method thereof |
| WO2022088122A1 (en) * | 2020-10-30 | 2022-05-05 | 河北比尔尼克新材料科技股份有限公司 | Water-based paint for leather and preparation method therefor |
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| CN102690904A (en) * | 2011-03-21 | 2012-09-26 | 赣州华坚国际鞋城有限公司 | Leather surface coating and finishing process |
| CN204526292U (en) * | 2015-02-13 | 2015-08-05 | 海宁中驰皮革有限公司 | Steering wheel leather fabric |
| CN104831545A (en) * | 2015-02-13 | 2015-08-12 | 海宁中驰皮革有限公司 | Steering wheel leather fabric and producing method thereof |
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2019
- 2019-12-27 CN CN201911378266.9A patent/CN111020071A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102690904A (en) * | 2011-03-21 | 2012-09-26 | 赣州华坚国际鞋城有限公司 | Leather surface coating and finishing process |
| CN204526292U (en) * | 2015-02-13 | 2015-08-05 | 海宁中驰皮革有限公司 | Steering wheel leather fabric |
| CN104831545A (en) * | 2015-02-13 | 2015-08-12 | 海宁中驰皮革有限公司 | Steering wheel leather fabric and producing method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022088122A1 (en) * | 2020-10-30 | 2022-05-05 | 河北比尔尼克新材料科技股份有限公司 | Water-based paint for leather and preparation method therefor |
| CN113278743A (en) * | 2021-05-18 | 2021-08-20 | 辽宁富新新材料有限公司 | Steering wheel leather resistant to heat shrinkage and preparation method thereof |
| CN113278743B (en) * | 2021-05-18 | 2023-09-19 | 辽宁富新新材料有限公司 | Heat-shrinkage-resistant steering wheel leather and preparation method thereof |
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