CN113306500B

CN113306500B - Automotive interior ceramic panel

Info

Publication number: CN113306500B
Application number: CN202110441102.7A
Authority: CN
Inventors: 黄振华; 夏振宇; 郑松; 汪德培
Original assignee: NINGBO LAWRENCE AUTOMOTIVE INTERIORS CO Ltd
Current assignee: NINGBO LAWRENCE AUTOMOTIVE INTERIORS CO Ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2022-09-16
Anticipated expiration: 2041-04-23
Also published as: CN113306500A

Abstract

The application discloses automotive interior ceramic panels, including sheet metal, one side of sheet metal has set gradually passivation film layer, priming paint layer, ceramic color paint layer and ceramic finish paint layer, sheet metal's opposite side is equipped with hot melt adhesive layer, the ceramic color paint layer adopts following raw materials preparation: 70-80 parts by mass of polyurethane resin, 15-22 parts by mass of nano ceramic microspheres, 5-12 parts by mass of ceramic powder, 1-3 parts by mass of inorganic binder, 8-10 parts by mass of bentonite, 1.2-3.5 parts by mass of feldspar powder, 3.7-5.2 parts by mass of curing agent, 0.2-0.6 part by mass of auxiliary agent and 65-90 parts by mass of deionized water, so that the prepared ceramic panel has the advantages of strong paint film adhesion, high heat resistance, high wear resistance and high impact resistance, and the film has high glossiness.

Description

Automotive interior ceramic panel

Technical Field

The application relates to the technical field of automotive interior parts, in particular to an automotive interior ceramic panel.

Background

Currently, energy conservation and environmental protection are the general trends of traffic vehicle development, and are the major problems related to human sustainable development. The light weight of the automobile body is one of the most effective measures for reducing fuel consumption and emission of the automobile. The light weight of the automobile is to reduce the whole weight of the automobile as much as possible on the premise of ensuring the strength and the safety performance of the automobile, thereby improving the dynamic property of the automobile, reducing the fuel consumption and reducing the exhaust pollution; in order to meet the requirement of vehicle body light weight, the vehicle body and the interior trim parts are mostly made of aluminum alloy materials. The interior plaque among the prior art because its special emphasis is decorative, and often with flammable plastics welding for it can't bear higher temperature, leads to its practicality not strong, and the lacquer layer easily takes place to drop under the high temperature condition, and it is inevitable in installation and use in the interior plaque among the prior art in addition can take place to scrape and bump, easily leads to it to appear the mar or fall the lacquer, influences its outward appearance.

Disclosure of Invention

In order to overcome the defects of the prior art, an object of the present application is to provide an automotive interior ceramic panel coated with a ceramic colored paint, wherein the ceramic colored paint on the surface of the panel has strong adhesion after being dried to form a film, and has high heat resistance, wear resistance and impact resistance, and the glossiness of the film layer is high.

In order to achieve the above purpose, the technical scheme adopted by the application is as follows: the utility model provides an automotive interior ceramic panel, includes sheet metal, one side of sheet metal has set gradually passivation film layer, priming paint layer, ceramic color paint layer and ceramic finish paint layer, sheet metal's opposite side is equipped with hot melt adhesive layer, the ceramic color paint layer adopts following raw materials preparation: 70-80 parts by mass of polyurethane resin, 15-22 parts by mass of nano ceramic microspheres, 5-12 parts by mass of ceramic powder, 1-3 parts by mass of inorganic binder, 8-10 parts by mass of bentonite, 1.2-3.5 parts by mass of feldspar powder, 3.7-5.2 parts by mass of curing agent, 0.2-0.6 part by mass of auxiliary agent and 65-90 parts by mass of deionized water.

Further, the polyurethane resin is modified polyurethane resin, and the ceramic powder is modified ceramic powder.

Further, the nano ceramic microspheres comprise one or more of nano silicon dioxide microspheres and nano titanium dioxide microspheres, and the particle size of the nano ceramic microspheres is 20-30 nm.

Further, the ceramic powder comprises one or more of nano silicon dioxide powder and nano titanium dioxide powder, and the particle size of the ceramic powder is 45-60 nm.

Further, the auxiliary agent comprises an anti-settling agent, a drier and a toughening agent, and the anti-settling agent, the drier and the toughening agent are in a ratio of 1:2:1 in parts by mass.

Further, the anti-settling agent is one or more of polyethylene wax and polyamide wax.

Further, the drier is dibutyltin dilaurate.

Further, the toughening agent is one or more of ethylene propylene rubber, polybutadiene rubber, methyl methacrylate-butadiene-styrene terpolymer, ethylene-vinyl acetate copolymer, glass fiber and carbon fiber.

Further, the inorganic binder is one or more of silicate, gypsum powder, putty powder and water glass.

Further, the curing agent is one or more of aliphatic isocyanate, vinyl triamine, m-phenylenediamine and diaminodiphenylmethane.

A preparation method of ceramic colored paint comprises the following steps:

s100, sequentially adding nano ceramic microspheres, inorganic adhesive, bentonite and deionized water into a dispersion cylinder, and dispersing at a high speed of 1000r/min for 8min for later use;

s200, after the raw materials are uniformly dispersed and mixed in the step S100, sequentially adding feldspar powder, a curing agent and a toughening agent, and continuously dispersing for 15min under the condition of keeping 1000 r/min;

s300, after the raw materials are uniformly dispersed and mixed in the step S200, adding ceramic powder, an anti-settling agent and polyurethane resin in sequence, and dispersing for 30-45 min at the rotating speed of 1500 r/min;

s400, after the raw materials are uniformly dispersed and mixed in the step S300, adding a drier, and dispersing for 30min at the rotating speed of 1200r/min to obtain the ceramic colored paint.

Further, the preparation method of the polyurethane resin in the step S300 includes the steps of:

s310, sequentially adding isocyanate, methyl isobutyl ketone and 2, 2-dihydroxy methyl butyric acid into a stirrer for stirring, wherein the stirring temperature is 75 ℃, and the stirring speed is 500-800 r/min;

s320, adding bismuth methylsulfonate into the step S310, continuing stirring, reacting for 3 hours, adding butanediol to continue reacting for 1-1.5 hours, adding ethylene glycol ethyl ether, and keeping the temperature for 0.5 hour to obtain a PU prepolymer;

s330, cooling the PU prepolymer in the step S320 to 40 ℃, then adding ultrasonically treated sulfonic acid type ethylenediamine ethanesulfonic acid sodium salt, hydrophilic silicon dioxide and sodium hydroxide aqueous solution while stirring for neutralization and phase inversion, wherein the stirring speed is 1200-1800 r/min, and the stirring time is 1.5-2 h;

s340, adjusting the temperature to 80 ℃, adding a dilute sodium persulfate solution into the step S330 to initiate a free radical reaction, and keeping the temperature for 2 hours to obtain the modified polyurethane resin emulsion.

Compared with the prior art, the beneficial effect of this application lies in:

(1) the modified polyurethane resin can ensure that the ceramic panel has ceramic color, and is connected with the primer layer through chemical bond force, so that the ceramic panel has better adhesion property, cracking resistance and chalking resistance.

(2) The nano ceramic microspheres enable the paint film structure of the prepared ceramic colored paint to be more compact and the color to be close to real ceramic, and meanwhile, the nano ceramic microspheres and the modified polyurethane resin are used simultaneously, so that the weather resistance of the ceramic colored paint can be conveniently improved, the ceramic colored paint has weather resistance superior to that of a fluorine-containing coating, the original gloss and appearance can be still maintained after 2000 hours of manual accelerated weather resistance test, and meanwhile, the wear resistance and the scratch resistance of the ceramic colored paint can also be improved.

(3) The modified polyurethane resin can fuse different monomers, so that different substances can respectively exert respective effects in the same system to form a high-molecular alloy body, meanwhile, the surface of the ceramic colored paint has a special complex fine protrusion structure, so that the ceramic colored paint has special soft velvet touch, and the characteristic of the ceramic colored paint similar to the lotus leaf surface increases the water contact angle, so that the ceramic colored paint has special hydrophobic and oleophobic characteristics and excellent antifouling and self-cleaning performances.

(4) The air spraying can be adopted to produce even paint, the paint layer is fine and smooth, and the uniform spraying can be realized for the more concealed parts (such as gaps and concave-convex parts) on the ceramic panel, so that the ceramic colored paint can be uniformly sprayed on the ceramic panel, and the ceramic panel with ceramic color, soft velvet touch feeling, excellent stain resistance and beautiful and elegant appearance is obtained.

Drawings

FIG. 1 is a perspective view (front facing outward) of an automotive interior trim assembly of the present application.

FIG. 2 is a perspective view (back-side facing outward) of the automotive interior assembly of the present application.

FIG. 3 is a schematic view of a rear portion of an automotive interior trim assembly of the present application.

Fig. 4 is an exploded view of the automotive interior assembly of the present application.

FIG. 5 is a schematic view of a plastic interior panel of the automotive interior assembly of the present application.

Fig. 6 is an enlarged schematic view of fig. 5 a of the present application.

Fig. 7 is a schematic view of the plastic interior trim panel of the present application in a separated state from the third panel.

Fig. 8 is an enlarged schematic view of fig. 7 at B.

Fig. 9 is a perspective view of a clasp of the present application.

Fig. 10 is a front view of the clasp of the present application.

Fig. 11 is a schematic view of a connector according to the present application.

FIG. 12 is a schematic view of a coating of a ceramic panel according to the present application.

In the figure: 1. an automotive interior assembly; 10. a plastic interior trim panel; 11. an air outlet; 12. buffering foam; 121. a first buffer foam; 122. second buffer foam; 123. a first buffer section; 124. a second buffer section; 13. bonding the blocks; 131. a connecting member; 132. a connecting portion; 133. a clamping part; 134. an adhesive layer; 135. a hasp; 14. an insertion block; 15. a connecting plate; 151. a clamping groove; 152. a first bump; 16. a second bump; 17. a first card slot; 18. buckling; 181. a butting block; 182. a first clamping section; 183. a first connection section; 184. a second clamping section; 185. a first elastic section; 186. a first through hole; 187. a second elastic section; 188. a second through hole; 189. a clamping area; 19. a butt joint groove; 20. a ceramic panel; 21. a first clamping block; 22. a second fixture block; 23. a metal thin plate; 24. passivating the film layer; 25. a primer layer; 26. a ceramic colored paint layer; 27. a ceramic topcoat layer; 28. A hot melt adhesive layer; 29. a plastic substrate; 30. a third panel; 31. a first groove; 32. and a second card slot.

Detailed Description

The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.

In the description of the present application, it should be noted that, for the orientation words, such as the terms "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and positional relationship indicated are based on the orientation or positional relationship shown in the present application, and are only for the convenience of describing the present application and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of protection of the present application.

It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

As shown in fig. 1-12, an automotive interior assembly 1 includes a plastic interior panel 10 and a ceramic panel 20, the ceramic panel 20 is fastened below the plastic interior panel 10, so that the ceramic panel 20 is quickly mounted on the plastic interior panel 10, the front of the plastic interior panel 10 is integrally recessed to form an air outlet 11, the air outlet 11 is disposed above the ceramic panel 20, the air outlet 11 is capable of communicating with an air conditioner and a cab on an automobile body, so that air generated by the air conditioner is blown out from the air outlet 11, thereby achieving the purpose of ventilating the cab, the back of the plastic interior panel 10 is provided with a plurality of buffer foam 12, the plurality of buffer foam 12 are respectively bonded to the back of the plastic interior panel 10, the plurality of buffer foam 12 are capable of buffering the plastic interior panel 10 and the automobile body, so that when the plastic interior panel 10 is connected to the automobile body, no collision occurs between the two, the problem that noise easily appears between the automobile and the automobile in the later period due to starting of the automobile can be avoided simultaneously by ensuring the stability of the installation of the automobile.

As shown in fig. 5 and 11, a plurality of bonding blocks 13 are disposed on the plastic interior trim panel 10, the plurality of bonding blocks 13 are disposed at intervals on the back of the plastic interior trim panel 10, each bonding block 13 is provided with a connecting member 131 detachably connected to a central control position of the vehicle, the connecting member 131 includes a connecting portion 132 and a fastening portion 133, the fastening portion 133 is fixedly connected to the connecting portion 132, the connecting portion 132 is provided with an adhesive layer 134, the adhesive layer 134 can adhere the connecting portion 132 to the bonding blocks 13, the fastening portion 133 includes a plurality of hasps 135, the plurality of hasps 135 are respectively fixedly connected to the connecting portion 132, the plurality of hasps 135 can fix the plastic interior trim panel 10 to the central control position of the vehicle, by setting one end of the connecting member 131 to be bonded and the other end to be fastened, the mode that both ends are fastened can be replaced, production cost is effectively reduced, and meanwhile, when the plastic interior trim panel 10 is simply bonded to the vehicle by using 3M adhesive, when the plastic trim panel 10 is disassembled, the connecting member 131 loses its connecting function, and thus cannot be recycled.

As shown in fig. 11, the buckle 135 is a mushroom-shaped buckle 135, and the mushroom-shaped buckle 135 facilitates quick fixing of the plastic interior panel 10 to the central control point of the vehicle, and meanwhile, since the mushroom-shaped buckle 135 has a long stroke, the plastic interior panel 10 having different shapes can be fixed to the central control point of the vehicle, thereby improving the practicability.

As shown in fig. 5, a plurality of insertion blocks 14 are disposed on the plastic interior panel 10, the insertion blocks 14 and the plurality of bonding blocks 13 are symmetrically disposed on two sides of the air outlet 11, the insertion blocks 14 are disposed below the bonding blocks 13, the insertion blocks 14 are aligned with the bonding blocks 13, a connecting member 131 on the bonding blocks 13 can fix the upper end of the plastic interior panel 10 at a central control position of the vehicle, the insertion blocks 14 can fix the lower end of the plastic interior panel 10 at the central control position of the vehicle, the upper and lower ends of the plastic interior panel 10 can be connected by disposing the insertion blocks 14 and the bonding blocks 13, and meanwhile, the left and right sides of the plastic interior panel 10 are provided with the buckles 18, so that the plastic interior panel 10 can be installed and fixed in four directions.

As shown in fig. 3 and 4, the buffering foam 12 includes a first buffering foam 121 and two second buffering foams 122, the first buffering foam 121 is disposed below the second buffering foam 122, the two first buffering foams 121 are symmetrically disposed at the upper end of the plastic interior trim panel 10, specifically, the first buffering foam 121 is disposed above the bonding block 13, the second buffering foam 122 is disposed below the plug-in block 14, the first buffering foam 121 can play a role in buffering when the connecting piece 131 is installed in the vehicle, and the second buffering foam 122 can play a role in buffering when the plug-in block 14 is inserted into the vehicle, so that the installation process of the plastic interior trim panel 10 is more stable, and noise generated at the connection between the plastic interior trim panel 10 and the vehicle central controller when the vehicle is started can be effectively reduced.

As shown in fig. 3 and 4, the first buffer foam 121 includes a first buffer section 123 and a second buffer section 124, the first buffer section 123 is transversely disposed above the insertion block 14, the second buffer section 124 is disposed in the middle of the first buffer section 123, the second buffer section 124 is integrally connected to the first buffer section 123, the first buffer section 123 and the second buffer section 124 are disposed to buffer the back of the plastic interior trim panel 10 in the transverse direction and the vertical direction, so as to improve the safety during the installation process, and reduce the noise generated between the plastic interior trim panel 10 and the vehicle central control.

As shown in fig. 5 and 6, the connecting plates 15 are disposed on two sides of the plastic interior trim panel 10, the connecting plates 15 are integrally formed on the plastic interior trim panel 10, the integral forming facilitates processing the plastic interior trim panel 10 and installation of the plastic interior trim panel 10, the connecting plates 15 are formed with clamping grooves 151, the clamping grooves 151 are internally provided with fasteners 18, so as to fix the left and right sides of the plastic interior trim panel 10 in a vehicle, the connecting plates 15 are provided with two first protrusions 152, the two first protrusions 152 are symmetrically disposed on two sides of the clamping grooves 151, a contact groove 19 is formed between each first protrusion 152 and the connecting plate 15, two ends of the fasteners 18 are respectively bent outwards to form contact blocks 181, the contact blocks 181 are aligned with the contact grooves 19, the fasteners 18 are made of metal and have elasticity, when the contact blocks 181 are abutted against the contact grooves 19, the fasteners 18 are installed in the clamping grooves 151, through setting up butt joint piece 181 and butt joint groove 19 for on buckle 18 can be fixed in connecting plate 15 fast, also be convenient for the later stage simultaneously and change buckle 18, reduce replacement cost.

As shown in fig. 6, the number of the buckles 18 is a group, so that the plastic interior trim panel 10 can be effectively and firmly clamped, the number of the buckles 18 on the whole connecting plate 15 can be simplified, and the clamping efficiency can be improved.

As shown in fig. 9 and 10, the buckle 18 includes a first clamping section 182, a first connecting section 183, and a second clamping section 184, the first connecting section 183 is connected to the first clamping section 182 and the second clamping section 184, the first clamping section 182 and the second clamping section 184 are respectively expanded from two sides of the first connecting section 183 to form clamping sections, the diameters of the clamping sections decrease from the clamping groove 151 to the first connecting section 183 in sequence, so that the two ends of the plastic interior trim panel 10 are clamped in the automobile through the first clamping section 182 and the second clamping section 184.

As shown in fig. 9, the first clamping section 182 is provided with a first elastic section 185 and a first through hole 186, the first elastic section 185 faces the first through hole 186, one end of the first elastic section 185 is fixed to the abutting block 181, the other end of the first elastic section 185 is disposed in the clamping region in an outward bending manner, the first elastic section 185 is in a hook shape, the first through hole 186 is communicated with the clamping region, the first elastic section 185 can move back and forth between the clamping region and the first through hole 186, the second clamping section 184 is provided with a second elastic section 187 and a second through hole 188, the first elastic section 185 faces the first through hole 186, one end of the second elastic section 187 is fixed to the abutting block 181, the other end of the second elastic section 187 is disposed in the clamping region in an outward bending manner, the second elastic section 187 is in a hook shape, the second through hole 188 is communicated with the clamping region, the first elastic section 185 can move back and forth between the clamping region and the first through hole 186, when the fixed block on the vehicle central control is inserted into the clamping area, the first elastic section 185 can move towards the first through hole 186, and the second elastic section 187 can move towards the second through hole 188, so that the fixed block can be inserted between the first elastic section 185 and the second elastic section 187, and the fixed block can be firmly clamped in the clamping area 189 under the elastic force of the first elastic section 185 and the second elastic section 187, so that the connection between the connecting plate 15 and the vehicle central control can be realized.

As shown in fig. 10, the first elastic section 185 and the second elastic section 187 are symmetrically distributed, a clamping area 189 is formed between the first elastic section 185 and the second elastic section 187, and when the first elastic section 185 and the second elastic section 187 are symmetrically distributed, so that the fixing block on the central controller of the automobile can be conveniently inserted into the clamping area 189, the first elastic section 185 and the second elastic section 187 can clamp the fixing block, and the plastic trim panel 10 can be rapidly installed on the central controller of the automobile.

As shown in fig. 7 and 8, the third panel 30 is clamped below the ceramic panel 20, a plurality of first grooves 31 are formed in the third panel 30, a plurality of second bumps 16 are formed in the plastic interior trim panel 10, each second bump 16 is aligned to each first groove 31, when the third panel 30 is installed, only each second bump 16 on the ceramic panel 20 needs to be aligned to each first groove 31, and meanwhile, the second fixture 22 on the ceramic panel 20 is clamped into the second clamp groove 32, so that the third panel 30 is installed on the ceramic panel 20, a clamping manner is adopted, quick connection between the third panel and the ceramic panel is facilitated, and the plastic interior trim panel 10, the ceramic panel 20 and the third panel 30 are arranged to enable the interior decoration of the automobile to be more attractive and elegant.

As shown in fig. 3 and 4, a plurality of first fixture blocks 21 and a plurality of second fixture blocks 22 are disposed on the ceramic panel 20, a plurality of first clamping grooves 17 are disposed on the plastic interior panel 10, a plurality of second clamping grooves 32 are disposed on the third panel 30, each first fixture block 21 is aligned with each first clamping groove 17, each second fixture block 22 is aligned with each second clamping groove 32, when the ceramic panel 20 is installed, the first fixture blocks 21 are aligned with the first clamping grooves 17, respectively, so that the ceramic panel 20 can be clamped below the plastic interior panel 10, when the third panel 30 is installed, the second protrusions 16 are aligned with the first grooves 31, and the second fixture blocks 22 are aligned with the second clamping grooves 32, so that the third panel 30 can be rapidly clamped below the ceramic panel 20, different panels can be connected in a clamping manner, and the connection speed between the panels can be effectively increased, and is convenient to disassemble.

As shown in fig. 12, the ceramic panel 20 includes a metal thin plate 23, one side of the metal thin plate 23 is sequentially provided with a passivation film layer 24, a primer layer 25, a ceramic colored paint layer 26 and a ceramic finish paint layer 27, the passivation film layer 24 is disposed on the outer surface of one side of the metal thin plate 23, and the passivation film layer 24 is a chromium trioxide layer and is coated on the outer surface of the metal thin plate 23, so as to ensure the corrosion resistance of the metal thin plate 23 during the processing and treatment process and enhance the adhesive force of the primer film.

The primer layer 25 is arranged on the outer surface of the passivation film layer 24, the primer layer 25 is a polyurethane primer layer 25, and the polyurethane primer layer 25 is coated on the outer surface of the passivation film layer 24, so that the die not only can adapt to stamping and stretching with large curvature, but also can solve the problem of poor adhesion between the primer layer 25 and the ceramic color paint layer 26 through the bridging effect of the die, meanwhile, the risk that the surface of the metal sheet 23 is easily scratched in the machining process can be avoided, and the metal sheet 23 is protected in the machining process.

The ceramic colored paint layer 26 is arranged on the outer surface of the primer layer 25, the ceramic colored paint layer 26 comprises polyurethane resin, and ceramic microspheres and ceramic powder dispersed in the polyurethane resin, the mass fraction of the ceramic microspheres in the ceramic colored paint layer 26 is 10% -30%, the mass fraction of the ceramic powder in the ceramic colored paint layer 26 is 1% -20%, and in a specific embodiment, the mass percentages of the polyurethane resin, the ceramic microspheres and the ceramic powder are 70:20: 10. Preferably, the mass fraction of the polyurethane resin in the ceramic colored paint layer 26 is not less than 70%, so that the ceramic colored paint layer 26 and the primer layer 25 have better adhesion, cracking resistance and chalking resistance on the premise of ensuring the ceramic color compared with the conventional high-temperature ceramic paint. In addition, the modified polyurethane resin in the ceramic colored paint layer 26 can fuse different monomers, so that different substances can exert respective effects in the same system to form a 'polymer alloy body', the 'polymer alloy body' has a special attached fine convex structure, so that the ceramic colored paint layer 26 has a special soft velvet touch feeling, and the characteristic of the ceramic colored paint layer similar to a 'lotus leaf surface' enables the water contact angle to be increased, and the hydrophobicity, the oleophobicity and the antifouling property of the ceramic colored paint layer are improved.

The ceramic topcoat layer 27 is disposed on an outer surface of the ceramic colored paint layer 26, and the ceramic topcoat layer 27 includes polyurethane resin and nano ceramic microspheres dispersed in the polyurethane resin, in a specific embodiment, a mass percentage of the polyurethane resin to the nano ceramic microspheres is 75: 25. The surface of the metal sheet 23 can be coated with light during spraying, so that on one hand, the weather resistance of the ceramic finish paint layer 27 can be improved, and the wear resistance and the scratch resistance of the ceramic finish paint layer 27 are improved, and on the other hand, the nano ceramic microsphere material is selected, so that the adhesive force, the density, the strength and other properties of the paint film of the ceramic finish paint layer 27 are greatly improved.

The ceramic microspheres are preferably ceramic microspheres subjected to nano-treatment.

In one embodiment, a method of nano-processing ceramic microspheres: the nano ceramic microspheres are prepared by using siloxane monomers and SiO2 sol as main raw materials through a sol-gel method, and the ceramic microspheres subjected to nano treatment, photocatalytic titanium dioxide and other components are added into the ceramic colored paint formula, so that the paint film is more compact in structure, close to real ceramic in color and luster, and more attractive and elegant in appearance.

In one embodiment, the nano ceramic microspheres comprise one or more of nano silica microspheres and nano titania microspheres, and the ceramic microspheres have a particle size of 20nm to 30 nm.

In one embodiment, the ceramic powder comprises one or more of nano silicon dioxide powder and nano titanium dioxide powder, and the particle size of the ceramic powder is 45 nm-60 nm.

The other side of the ceramic panel 20 is coated with a hot melt adhesive layer 28, the hot melt adhesive layer 28 is coated in a hot melt adhesive laminating mode, the hot melt adhesive layer 28 can connect the ceramic panel 20 and the plastic base material 29, the hot melt adhesive layer 28 adopts a hot-press laminating construction method, the problem of adhesion between the ceramic panel 20 and the plastic base material 29 can be effectively solved, in one embodiment, the thickness of an adhesive film of the hot melt adhesive layer 28 is 18-22 μm, the thickness of the adhesive film is reduced by 95% compared with that of conventional two-component glue, the production cost can be effectively reduced, meanwhile, the hot melt adhesive can be matched with environment-friendly water-based glue for use, the thickness of the adhesive film is 30-35 μm after the hot melt adhesive film is matched for use, and compared with solvent-based two-component glue with the thickness of 1mm at an inlet, the discharge of VOC substances can be effectively reduced.

Wherein, the thickness of the ceramic color paint layer 26 is 25 μm-35 μm, and the total thickness of the ceramic color paint layer 26 and the ceramic finish paint layer 27 is 60 μm-80 μm.

A preparation method of an automotive interior ceramic panel comprises the following steps:

s1, coating a layer of passivating agent on the surface of one side of the metal sheet, and forming a passivating film layer on the metal sheet;

s2, coating a primer on the outer surface of the passivation film layer of the metal sheet to form a primer layer;

s3, coating hot melt adhesive on the surface of the other side of the metal sheet to form a hot melt adhesive layer;

s4, performing punch forming on the metal sheet processed in the step S3 to obtain a three-dimensional modeling metal shell with a primer layer;

s5, insert molding the metal shell with the primer layer in the step S4 to obtain a first semi-finished product of the panel;

s6, milling the first semi-finished product of the panel to obtain a second semi-finished product of the panel;

s7, coating ceramic colored paint on the primer layer of the second semi-finished product of the panel to form a ceramic colored paint layer;

and S8, coating ceramic finish on the ceramic colored paint layer to form a ceramic finish paint layer, and obtaining the ceramic panel.

Step S9 is further included between step S6 and step S7 for degreasing and decontaminating the metal sheet.

Wherein, the passivating agent in the step S1 is a chromizing agent.

The material in the step S6 of insert molding is a mixture of polycarbonate and acrylonitrile-butadiene-styrene copolymer, and the mixture of polycarbonate and acrylonitrile-butadiene-styrene copolymer is selected for insert molding, so that compared with polyamide-6, the parts after injection molding are more stable, can withstand more severe changes in climate, temperature and humidity, and meet the requirements of loading sizes under different conditions.

The preparation method of the ceramic colored paint in the step S7 is to place the main agent, the curing agent and the diluent of the ceramic colored paint in a stirrer according to corresponding proportions for blending to obtain the ceramic colored paint.

And S8, the preparation method of the ceramic finish paint comprises the step of sequentially placing the main agent, the curing agent and the diluent of the ceramic finish paint in a stirrer for blending to obtain the ceramic finish paint.

Preferably, step S1 specifically operates as: cutting and cutting the metal sheet, leveling, degreasing and cleaning the metal sheet, and coating a chromizing agent on the surface of the metal sheet by using roll coating equipment to form a passivation film layer.

Preferably, step S2 specifically operates as: introducing a primer coating into a coating machine, adjusting the relative gap and the running speed between a coating wheel and an adjusting wheel, pressing the coating wheel downwards, so that the primer coating adsorbed on the coating wheel can be transferred onto a metal sheet, forming a primer layer with the wet film thickness of 20-30 microns on the surface, conveying the metal sheet into a hot air drying box, and baking at 200-250 ℃ for 4-6 min to obtain the primer layer with the dry film thickness of 8-12 microns.

Preferably, step S3 specifically operates as: the front side (containing the primer layer) of the metal sheet is downward and placed under a flat hot-pressing film, the cut waterborne polyurethane hot-melting adhesive film with the thickness of 30-60 mu m is flatly laid on the back side of the metal sheet, hot-pressing equipment is started to carry out die assembly, the die assembly temperature of the hot-pressing film is 130-160 ℃, the pressing time is 15-30 s, and the semitransparent hot-melting adhesive layer can be obtained on the back side of the metal sheet after the die is opened.

Preferably, step S4 specifically operates as: and cutting the metal sheet with the hot melt adhesive layer coated on the back surface and the primer layer on the front surface according to the outline of the part, and sequentially performing blanking, stretching, trimming and punching in a hydraulic punching machine to obtain the three-dimensional semi-finished metal shell with the primer layer.

Preferably, step S5 specifically operates as: and (2) placing the metal shell into an injection mold cavity, fitting the front surface of the metal shell with a movable mold cavity surface of an injection mold, and after mold closing, performing insert injection molding on a mixture of transparent polycarbonate and acrylonitrile-butadiene-styrene copolymer at 260-290 ℃ to obtain a first semi-finished product of the panel.

Preferably, step S6 specifically operates as: and (3) placing the first semi-finished product of the panel on a special tool, and milling by using five-axis numerical control machine milling equipment provided with a 4-8 mm milling cutter, wherein the feeding speed of the milling equipment is 1000-2000 mm/min, so that a second semi-finished product of the panel is obtained.

Preferably, step S7 specifically operates as: and placing the second semi-finished product of the panel in a spraying chamber, spraying ceramic colored paint to and fro on the primer layer of the second semi-finished product of the panel by using an air spray gun to ensure that the spraying thickness is 25 mu m, standing and leveling for 5-10 min after spraying, and then placing the second semi-finished product of the panel in a tunnel furnace for drying.

Specifically, the preparation method of the ceramic colored paint in the step S7 includes: ceramic colored paint is prepared by the following main agents: curing agent: and (3) placing the diluent in a stirrer according to the proportion of 100:20:20 for blending at the stirring speed of 500-1000 r/min, uniformly stirring, adjusting the viscosity of the mixture to 18-22 s (DIN 4 cup), and standing and curing for 10-20 min to obtain the ceramic colored paint.

Preferably, step S8 specifically operates as: and (5) placing the second semi-finished product of the panel dried in the step (S7) in a spraying chamber, spraying ceramic finish paint on the ceramic colored paint layer of the second semi-finished product of the panel back and forth by using an air spray gun, standing and leveling for 5-10 min after the ceramic finish paint is sprayed, and then placing the second semi-finished product of the panel in a tunnel furnace for drying.

Specifically, the preparation method of the ceramic topcoat in step S8 includes: ceramic finish paint is prepared by the following main components: curing agent: and (3) placing the diluent in a ratio of 100:20:70 in a stirrer for blending, wherein the stirring speed is 500-1000 r/min, uniformly stirring, adjusting the viscosity to 10-14 s (DIN 4 cup), standing and curing for 10-20 min to obtain the ceramic finish.

Preferably, the spraying manner in steps S7 and S8 is to use an air spray gun with a 1.7mm caliber; the temperature of the spraying chamber is 25 +/-5 ℃, and the cleanliness is 10000 grades; the temperature of the tunnel furnace is 80 ℃, and the drying time is 30-35 min.

Preferably, the degreasing operation of the metal sheet in step S9 is as follows: and hanging a paint spraying line on the metal sheet milled by the numerical control machine tool, manually wiping the surface of the metal sheet by using an IPA solvent, and cleaning to remove oil stains on the surface of the metal sheet and clean the surface of the metal sheet. In one embodiment, the greasy dirt on the surface of the sheet metal is removed by means of automatic dry ice cleaning.

In some embodiments, the metal sheet may be pretreated by anodization, electrophoresis, or the like, so as to improve the antifouling, scratch resistance, and weather resistance of the metal sheet.

The main agent in the step S7 comprises ceramic microspheres processed by a nanotechnology, a modified ceramic powder material and a modified polyurethane resin, wherein the mass percentage of the modified polyurethane resin, the nanometer ceramic microspheres and the modified ceramic powder is 70:20:10, the curing agent is one or more of vinyl triamine, ethylenediamine, diaminocyclohexane, m-phenylenediamine and benzidine, and the diluent is one or more of methyl isobutyl ketone, ethyl acetate and butanone.

The main agent in the step S8 includes a nano modified polyurethane resin and a nano ceramic microsphere, wherein the nano modified polyurethane resin and the nano ceramic microsphere are 75:25 by mass, the curing agent is one or more of aliphatic polyamine, acid anhydride and tertiary amine, and the diluent is one or more of butyl glycidyl ether, ethylene glycol diglycidyl ether and phenyl glycidyl ether.

The chromizing agent in step S1 is chromium trioxide, which is mostly used for treating aluminum, magnesium and alloys thereof, and can also form a chromizing layer on steel, and is generally used in combination with phosphating to seal pores of the phosphating layer, passivate bare metal in the phosphating layer, inhibit the corrosion of the metal and further increase the protective capability of the metal.

The thickness of the metal sheet is 0.6-0.8 mm, so that the thinning requirement of the tip of the product structure under a large-amplitude stretching process can be met, and the situation of stretching fracture cannot occur.

Example 1

(1) surface pretreatment of the metal sheet: cutting a metal sheet with the thickness of 0.8mm into a size of 1400 x 610mm, leveling, degreasing by an alkaline degreasing solution at 55 ℃, washing by RO pure water, and coating chromium trioxide with alkalescent silanization pretreatment on the surface of the metal sheet by a roll coating device to form a passivation film layer of 2 mu m.

(2) Primer coating treatment: under the action of a bottom conveying wheel of roll coating equipment, a passivated metal sheet passes through a roller coating machine, primer paint is introduced into the coating machine, the relative gap between a coating wheel and an adjusting wheel and the running speed are adjusted, so that when the metal sheet passes through the coating machine at the speed of 3m/min, the coating wheel is pressed downwards, the primer paint adsorbed on the coating wheel is transferred onto the metal sheet, a primer layer with the wet film thickness of 30 mu m is formed on the surface of the metal sheet, then the metal sheet is conveyed into a hot air drying box and is baked at 200 ℃ for 6min, and the primer layer with the dry film thickness of 12 mu m, uniform thickness, excellent physical and chemical properties and excellent adhesion properties can be obtained.

(3) And (3) sticking and covering a hot melt adhesive: the front surface (containing the primer layer) of the metal sheet is downward and placed under a flat hot-pressing film, the cut 30-micron waterborne polyurethane hot-melt adhesive film is flatly laid on the back surface of the metal sheet, hot-pressing equipment is started to carry out die assembly, the die assembly temperature of the hot-pressing film is 130 ℃, the pressing time is 30s, and after the die is opened, the semitransparent hot-melt adhesive layer can be obtained on the back surface of the metal sheet.

(4) Stamping and forming a metal sheet: and cutting the metal sheet with the hot melt adhesive layer on the back and the primer layer on the front according to the outline of the part, and sequentially performing blanking, stretching, trimming and punching in a hydraulic punching machine to obtain the three-dimensional metal shell with the primer layer.

(5) Insert molding: and placing the metal shell into an injection mold cavity, attaching the front surface of the metal shell to a movable mold cavity surface of an injection mold, and after closing the mold, performing insert injection molding on a mixture of transparent polycarbonate and acrylonitrile-butadiene-styrene copolymer at 260 ℃ to obtain a first semi-finished product of the panel.

(6) Milling the numerical control machine tool: and (3) placing the first semi-finished product of the panel on a special tool, and milling by using five-axis numerical control machine milling equipment provided with a 4mm milling cutter, wherein the feeding speed of the milling equipment is 1000mm/min, so that a second semi-finished product of the panel is obtained.

(7) Removing oil stains: and (3) hanging a paint spraying line on the second semi-finished product of the panel milled by the numerical control machine tool, and manually wiping the second semi-finished product of the panel by using an IPA solvent to remove oil stains on the surface of the second semi-finished product of the panel and clean the surface of the second semi-finished product of the panel.

(8) Preparing ceramic colored paint: ceramic colored paint is prepared by the following main components: curing agent: and (3) putting the diluent in a ratio of 100:20:20 into a stirrer for blending, stirring at the speed of 500r/min, uniformly stirring, adjusting the viscosity to be 18s (DIN 4 cup), standing and curing for 10min to obtain the ceramic colored paint.

The main agent in the step (8) comprises ceramic microspheres processed by a nanotechnology, a plurality of modified ceramic powder materials and modified polyurethane resin, preferably, the modified polyurethane resin, the nano ceramic microspheres and the modified ceramic powder are 70:20:10 in mass percentage, the curing agent is vinyl triamine, and the diluent is ethyl acetate.

(9) Spraying ceramic colored paint: placing the second semi-finished product of the panel after oil stain removal in a spraying chamber with the temperature of 20 ℃ and the cleanliness of 10000 grades, spraying ceramic colored paint on a primer layer of the second semi-finished product of the panel to and fro by adopting an air spray gun with the caliber of 1.7mm to ensure that the spraying thickness is 25 mu m, standing and leveling for 5min after spraying, and then placing the second semi-finished product of the panel in a tunnel furnace with the temperature of 80 ℃ for drying for 30 min.

(10) Preparing ceramic finish: ceramic finish paint is prepared by the following main agents: curing agent: and (3) placing the diluent in a stirrer in a ratio of 100:20:70 for blending at a stirring speed of 500r/min, uniformly stirring, adjusting the viscosity to be 10s (DIN 4 cup), standing and curing for 10min to obtain the ceramic finish.

The main agent in the step (10) comprises nano modified polyurethane resin and nano ceramic microspheres, preferably, the mass percentage of the nano modified polyurethane resin to the nano ceramic microspheres is 75:25, the curing agent is aliphatic polyamine, and the diluent is butyl glycidyl ether.

(11) Spraying ceramic finish paint: and (3) placing the second semi-finished product of the panel dried in the step (11) in a spraying chamber with the temperature of 20 ℃ and the cleanliness of 10000 grades, spraying ceramic finish paint on the ceramic colored paint layer of the second semi-finished product of the panel to and fro by using an air spray gun with the caliber of 1.7mm, standing and leveling for 5min after spraying, then placing in a tunnel furnace with the temperature of 80 ℃ for drying for 30min, and thus obtaining the ceramic panel.

Example 2

(1) surface pretreatment of the metal sheet: a metal thin plate with a thickness of 0.6mm is cut into a size of 1400 × 610mm, then subjected to necessary leveling, deoiled by an alkaline degreasing solution at 60 ℃, washed by RO pure water, and coated with chromium trioxide with weak alkaline silanization pretreatment on the surface of the metal thin plate by a roll coating device to form a passivation film layer of 0.5 μm.

(2) Primer coating treatment: under the action of a bottom conveying wheel of roll coating equipment, a passivated metal sheet passes through a roller coater, primer paint is introduced into the coater, the relative gap between a coating wheel and an adjusting wheel and the running speed are adjusted, so that when the metal sheet passes through the coater at the speed of 9m/min, the coating wheel is pressed downwards, the primer paint adsorbed on the coating wheel is transferred onto the metal sheet, a primer layer with the wet film thickness of 20 microns is formed on the surface of the metal sheet, then the metal sheet is conveyed into a hot air drying box and is baked for 4min at 250 ℃, and the primer layer with the dry film thickness of 8 microns, uniform thickness, excellent physical and chemical properties and excellent adhesion properties can be obtained.

(3) And (3) sticking and covering a hot melt adhesive: the front side (containing the primer layer) of the metal sheet is downward and placed under a flat hot-pressing film, the cut 60-micron waterborne polyurethane hot-melt adhesive film is flatly laid on the back side of the metal sheet, hot-pressing equipment is started to carry out die assembly, the die assembly temperature of the hot-pressing film is 160 ℃, the pressing time is 15s, and after the die is opened, the semitransparent hot-melt adhesive layer can be obtained on the back side of the metal sheet.

(5) Insert molding: and placing the metal shell into an injection mold cavity, attaching the front surface of the metal shell to a movable mold cavity surface of an injection mold, and after closing the mold, performing insert injection molding on a mixture of transparent polycarbonate and acrylonitrile-butadiene-styrene copolymer at 290 ℃ to obtain a first semi-finished product of the panel.

(6) Milling the numerical control machine tool: and (3) placing the first semi-finished product of the panel on a special tool, and milling by using five-axis numerical control machine milling equipment provided with an 8mm milling cutter, wherein the feeding speed of the milling equipment is 2000mm/min, so that a second semi-finished product of the panel with a complete size is obtained.

(7) Removing oil stains: and hanging a paint spraying line on the second semi-finished product of the panel milled by the numerical control machine tool, and manually wiping the second semi-finished product of the panel by using an IPA solvent to remove oil stains on the surface of the second semi-finished product of the panel and clean the surface of the second semi-finished product of the panel.

(8) Preparing ceramic colored paint: ceramic colored paint is prepared by the following main agents: curing agent: and (3) putting the diluent in a ratio of 100:20:20 into a stirrer for blending, stirring at the speed of 1000r/min, uniformly stirring, adjusting the viscosity to 22s (DIN 4 cup), standing and curing for 10min to obtain the ceramic colored paint.

The main agent in the step (8) comprises ceramic microspheres processed by a nanotechnology, a plurality of modified ceramic powder materials and modified polyurethane resin, preferably, the mass percentage of the modified polyurethane resin, the nano ceramic microspheres and the modified ceramic powder is 70:20:10, the curing agent is ethylenediamine, and the diluent is ethyl acetate.

(9) Spraying ceramic colored paint: placing the second semi-finished panel after oil stain removal in a spraying chamber with the temperature of 30 ℃ and the cleanliness of 10000 grades, spraying ceramic colored paint on a primer layer of the second semi-finished panel by adopting an air spray gun with the caliber of 1.7mm to make the spraying thickness of the paint be 35 mu m, standing and leveling the paint for 10min after spraying, and then placing the paint in a tunnel furnace with the temperature of 80 ℃ for drying for 35 min.

(10) Preparing ceramic finish: ceramic finish paint is prepared by the following main agents: curing agent: and (3) putting the diluent in a ratio of 100:20:70 into a stirrer for blending, stirring at the speed of 1000r/min, uniformly stirring, adjusting the viscosity to be 14s (DIN 4 cup), standing and curing for 10min to obtain the ceramic finish.

The main agent in the step (10) comprises nano modified polyurethane resin and nano ceramic microspheres, preferably, the mass percentage of the nano modified polyurethane resin to the nano ceramic microspheres is 75:25, the curing agent is anhydride, and the diluent is ethylene glycol diglycidyl ether.

(11) Spraying ceramic finish paint: and (3) placing the second semi-finished product of the panel dried in the step (11) in a spraying chamber with the temperature of 30 ℃ and the cleanliness of 10000 grades, spraying ceramic finish paint on the ceramic colored paint layer of the second semi-finished product of the panel to and fro by using an air spray gun with the caliber of 1.7mm, standing and leveling for 10min after spraying, then placing in a tunnel furnace with the temperature of 80 ℃ for drying for 35min, and thus obtaining the ceramic panel.

Example 3

(1) surface pretreatment of the metal sheet: a metal thin plate with a thickness of 0.7mm is cut into a size of 1400 × 610mm, then subjected to necessary leveling, deoiled by an alkaline degreasing solution at 60 ℃, washed by RO pure water, and coated with chromium trioxide with weak alkaline silanization pretreatment on the surface of the metal thin plate by a roll coating device to form a 1.8 μm passivation film layer.

(2) Primer coating treatment: under the action of a bottom conveying wheel of roll coating equipment, a passivated metal sheet passes through a roller coater, primer paint is introduced into the coater, the relative gap between a coating wheel and an adjusting wheel and the running speed are adjusted, so that when the metal sheet passes through the coater at the speed of 6m/min, the coating wheel is pressed downwards, the primer paint adsorbed on the coating wheel is transferred onto the metal sheet, a primer layer with the wet film thickness of 25 mu m is formed on the surface of the metal sheet, then the metal sheet is conveyed into a hot air drying box and is baked for 5min at 220 ℃, and the primer layer with the dry film thickness of 10 mu m, uniform thickness, excellent physical and chemical properties and excellent adhesion properties can be obtained.

(3) And (3) sticking and covering a hot melt adhesive: the front face (containing a primer layer) of the metal sheet is downward and placed under a flat hot-pressing film, the cut 45-micron waterborne polyurethane hot-melt adhesive film is laid on the back face of the metal sheet, hot-pressing equipment is started to carry out die assembly, the die assembly temperature of the hot-pressing film is 150 ℃, the pressing time is 22s, and the semitransparent hot-melt adhesive layer can be obtained on the back face of the metal sheet after the die is opened.

(5) Insert molding: and placing the metal shell into an injection mold cavity, attaching the front surface of the metal shell to a movable mold cavity surface of an injection mold, and performing insert injection molding at 275 ℃ by using a mixture of transparent polycarbonate and acrylonitrile-butadiene-styrene copolymer after mold closing to obtain a first semi-finished product of the panel.

(6) Milling the numerical control machine tool: and (3) placing the first semi-finished product of the panel on a special tool, and milling by using five-axis numerical control machine milling equipment provided with a 6mm milling cutter, wherein the feeding speed of the milling equipment is 1500mm/min, so that a second semi-finished product of the panel with complete size is obtained.

(8) Preparing ceramic colored paint: ceramic colored paint is prepared by the following main agents: curing agent: and (3) putting the diluent in a ratio of 100:20:20 into a stirrer for blending, stirring at the speed of 800r/min, uniformly stirring, adjusting the viscosity to be 20s (DIN 4 cup), standing and curing for 10min to obtain the ceramic colored paint.

The main agent in the step (8) comprises ceramic microspheres processed by a nanotechnology, a plurality of modified ceramic powder materials and modified polyurethane resin, preferably, the mass percentage of the modified polyurethane resin, the nano ceramic microspheres and the modified ceramic powder is 70:20:10, the curing agent is m-phenylenediamine, and the diluent is ethyl acetate butanone.

(9) Spraying ceramic colored paint: placing the second semi-finished product of the panel after oil stain removal in a spraying chamber with the temperature of 25 ℃ and the cleanliness of 10000 grades, spraying ceramic colored paint on a primer layer of the second semi-finished product of the panel to and fro by adopting an air spray gun with the caliber of 1.7mm to ensure that the spraying thickness is 30 mu m, standing and leveling for 8min after spraying, and then placing the second semi-finished product of the panel in a tunnel furnace with the temperature of 80 ℃ for drying for 32 min.

(10) Preparing ceramic finish: ceramic finish paint is prepared by the following main agents: curing agent: and (3) putting the diluent in a ratio of 100:20:70 into a stirrer for blending, stirring at the speed of 800r/min, uniformly stirring, adjusting the viscosity to 12s (DIN 4 cup), standing and curing for 10min to obtain the ceramic finish.

The main agent in the step (10) comprises nano modified polyurethane resin and nano ceramic microspheres, preferably, the mass percentage of the nano modified polyurethane resin to the nano ceramic microspheres is 75:25, the curing agent is tertiary amine, and the diluent is phenyl glycidyl ether.

(11) Spraying ceramic finish paint: and (3) placing the second semi-finished product of the panel dried in the step (10) in a spraying chamber with the temperature of 25 ℃ and the cleanliness of 10000 grades, spraying ceramic finish paint to and fro on the ceramic colored paint layer of the second semi-finished product of the panel by using an air spray gun with the caliber of 1.7mm, standing and leveling for 10min after spraying, and then placing in a tunnel furnace with the temperature of 80 ℃ for drying for 32min to obtain the ceramic panel.

Example 4

A method for producing an automotive interior ceramic panel was the same as in example 3, except that the primer layer in step (2) was an acrylic layer.

Example 5

A preparation method of the ceramic panel for the automotive interior is the same as that of example 3, except that the primer layer in the step (2) is an epoxy paint layer.

The properties of the ceramic panels for automotive interiors prepared in examples 1 to 5 are shown in Table 1.

TABLE 1 examples 1 to 5 Properties of ceramic Panel for automotive interior

Wherein the tensile properties were measured according to ISO527-2, the test specimens were 150mm 10mm 4mm, the tensile speed was 50mm/min, the bending properties were measured according to ISO 178, the test specimens were 80mm 10mm 4mm, and the bending speed was 2 mm/min.

As can be seen from table 1, the ceramic panel of example 3 is optimal in various properties such as tensile strength, flexural strength, and adhesion, and when the primer layer is a urethane resin layer, the adhesion and tensile strength are superior to those when the primer layer is an acrylic layer and the primer layer is an epoxy layer.

Example 6

A method for producing an automotive interior ceramic panel was the same as in example 3, except that the ceramic panel was not coated with the ceramic topcoat layer in step (8).

Example 7

A method for producing an automotive interior ceramic panel was the same as in example 3 except that the ceramic panel was not coated with the ceramic colored paint layer in step (7).

The properties of the ceramic panels for automotive interior prepared in examples 3, 6 and 7 are shown in Table 2.

Table 2 examples 3, 6, 7 properties of automotive interior ceramic panels

Wherein the adhesion refers to GB/T1720-79 (89) paint film adhesion determination method, the impact strength refers to GB/T3808-1995 pendulum impact tester, and the wet heat resistance refers to GB/T1740-1979 (1989) paint film wet heat resistance determination method

As can be seen from table 2, the adhesion, impact strength and wet heat resistance of examples 6 and 7 are all inferior to those of example 3, the adhesion of the ceramic panel of example 6 is better than that of the ceramic panel of example 6 because the ceramic topcoat layer is not coated, the ceramic colored paint layer is not coated, and the adhesion of the ceramic panel of example 7 is better than that of the ceramic panel of example 6, and thus the adhesion of the ceramic panel is enhanced by the ceramic colored paint layer, and the impact strength and wet heat resistance of the ceramic panel of example 7 are both inferior to those of example 6, and thus the impact strength and wet heat resistance of the ceramic panel are enhanced by the ceramic topcoat layer.

A ceramic colored paint layer for spraying a ceramic panel for automotive interior decoration is prepared from the following raw materials: 70-80 parts by mass of polyurethane resin, 15-22 parts by mass of nano ceramic microspheres, 5-12 parts by mass of ceramic powder, 1-3 parts by mass of inorganic binder, 8-10 parts by mass of bentonite, 1.2-3.5 parts by mass of feldspar powder, 3.7-5.2 parts by mass of curing agent, 0.2-0.6 part by mass of auxiliary agent and 65-90 parts by mass of deionized water.

Wherein the polyurethane resin is modified polyurethane resin, and the ceramic powder is modified ceramic powder.

Wherein the nano ceramic microspheres comprise one or more of nano silicon dioxide microspheres and nano titanium dioxide microspheres, and the particle size of the nano ceramic microspheres is 20-30 nm.

Wherein the modified ceramic powder comprises one or more of nano silicon dioxide powder and nano titanium dioxide powder, and the particle size of the modified ceramic powder is 45-60 nm.

The auxiliary agent comprises an anti-settling agent, a drier and a toughening agent, and the anti-settling agent, the drier and the toughening agent are in a ratio of 1:2:1 in parts by mass.

Wherein, the anti-settling agent is one or more of polyethylene wax and polyamide wax.

Wherein the drier is dibutyltin dilaurate.

Wherein the toughening agent is one or more of ethylene propylene rubber, polybutadiene rubber, methyl methacrylate-butadiene-styrene terpolymer, ethylene-vinyl acetate copolymer, glass fiber and carbon fiber.

Wherein the inorganic binder is one or more of silicate, gypsum powder, putty powder and water glass.

Wherein the curing agent is one or more of aliphatic isocyanate, vinyl triamine, m-phenylenediamine and diaminodiphenylmethane.

A preparation method of ceramic colored paint for spraying automobile interior decoration ceramic panels is characterized by comprising the following steps:

s300, after the raw materials are uniformly dispersed and mixed in the step S200, adding the modified ceramic powder, the anti-settling agent and the modified polyurethane resin in sequence, and dispersing for 30-45 min at the rotating speed of 1500 r/min;

The preparation method of the modified polyurethane resin in the step S300 comprises the following steps:

s320, adding bismuth methylsulfonate into the step S310, continuously stirring, reacting for 3 hours, then adding butanediol to continuously react for 1-1.5 hours, adding ethylene glycol ethyl ether, and keeping the temperature for 0.5 hour to obtain a PU prepolymer;

s330, firstly cooling the PU prepolymer in the step S320 to 40 ℃, then adding ultrasonically treated sulfonic acid type ethylenediamine ethanesulfonic acid sodium salt, hydrophilic silicon dioxide and sodium hydroxide aqueous solution while stirring for neutralization and phase inversion, wherein the stirring speed is 1200-1800 r/min, and the stirring time is 1.5-2 h;

Example 8

A preparation method of ceramic colored paint for spraying automobile interior decoration ceramic panels comprises the following steps:

s100, sequentially adding 15 parts by mass of nano ceramic microspheres, 1 part by mass of inorganic adhesive, 8 parts by mass of bentonite and 65 parts by mass of deionized water into a dispersion cylinder, and dispersing at a high speed of 1000r/min for 8min for later use;

s200, after the raw materials are uniformly dispersed and mixed in the step S100, sequentially adding 1.2 parts by mass of feldspar powder, 3.7 parts by mass of curing agent and 0.05 part by mass of toughening agent, and continuously dispersing for 15min under the condition of keeping 1000 r/min;

s300, after the raw materials are uniformly dispersed and mixed in the step S200, adding 5 parts by mass of modified ceramic powder, 0.05 part by mass of anti-settling agent and 70 parts by mass of modified polyurethane resin in sequence, and dispersing for 30min at the rotating speed of 1500 r/min;

s400, after the raw materials are uniformly dispersed and mixed in the step S300, adding 0.1 part by mass of a drier, and dispersing for 30min at the rotating speed of 1200r/min to obtain the ceramic colored paint.

Further, the preparation method of the modified polyurethane resin in the step S300 includes the following steps:

s310, sequentially adding isocyanate, methyl isobutyl ketone and 2, 2-dihydroxy methyl butyric acid into a stirrer for stirring, wherein the stirring temperature is 75 ℃, and the stirring speed is 500 r/min;

s320, adding bismuth methylsulfonate into the step S310, continuing stirring, reacting for 3 hours, then adding butanediol to continue reacting for 1 hour, adding ethylene glycol ethyl ether, and preserving heat for 0.5 hour to obtain a PU prepolymer;

s330, cooling the PU prepolymer in the step S320 to 40 ℃, then adding the ultrasonically treated sulfonic acid type ethylenediamine ethanesulfonic acid sodium salt, hydrophilic silicon dioxide and sodium hydroxide aqueous solution while stirring for neutralization and phase inversion, wherein the stirring speed is 1200r/min, and the stirring time is 1.5 h;

Example 9

s100, sequentially adding 22 parts by mass of nano ceramic microspheres, 3 parts by mass of inorganic adhesive, 10 parts by mass of bentonite and 90 parts by mass of deionized water into a dispersion cylinder, and dispersing at a high speed of 1000r/min for 8min for later use;

s200, after the raw materials are uniformly dispersed and mixed in the step S100, sequentially adding 3.5 parts by mass of feldspar powder, 5.2 parts by mass of curing agent and 0.15 part by mass of toughening agent, and continuously dispersing for 15min under the condition of keeping 1000 r/min;

s300, after the raw materials are uniformly dispersed and mixed in the step S200, adding 12 parts by mass of modified ceramic powder, 0.15 part by mass of anti-settling agent and 80 parts by mass of modified polyurethane resin in sequence, and dispersing for 45min at the rotating speed of 1500 r/min;

s400, after the raw materials are uniformly dispersed and mixed in the step S300, adding 0.3 part by mass of a drier, and dispersing for 30min at the rotating speed of 1200r/min to obtain the ceramic colored paint.

s310, sequentially adding isocyanate, methyl isobutyl ketone and 2, 2-dihydroxy methyl butyric acid into a stirrer for stirring, wherein the stirring temperature is 75 ℃, and the stirring speed is 800 r/min;

s320, adding bismuth methylsulfonate into the step S310, continuing stirring, reacting for 3 hours, then adding butanediol to continue reacting for 1.5 hours, adding ethylene glycol ethyl ether, and keeping the temperature for 0.5 hour to obtain a PU prepolymer;

s330, cooling the PU prepolymer in the step S320 to 40 ℃, then adding the ultrasonically treated sulfonic acid type ethylenediamine ethanesulfonic acid sodium salt, hydrophilic silicon dioxide and sodium hydroxide aqueous solution while stirring for neutralization and phase inversion, wherein the stirring speed is 1800r/min, and the stirring time is 2 h;

Example 10

s100, sequentially adding 18 parts by mass of nano ceramic microspheres, 2 parts by mass of inorganic adhesive, 9 parts by mass of bentonite and 70 parts by mass of deionized water into a dispersion cylinder, and dispersing at a high speed of 1000r/min for 8min for later use;

s200, after the raw materials are uniformly dispersed and mixed in the step S100, sequentially adding 1.8 parts by mass of feldspar powder, 4.5 parts by mass of curing agent and 0.1 part by mass of toughening agent, and continuously dispersing for 15min under the condition of keeping 1000 r/min;

s300, after the raw materials are uniformly dispersed and mixed in the step S200, adding 8 parts by mass of modified ceramic powder, 0.1 part by mass of anti-settling agent and 75 parts by mass of modified polyurethane resin in sequence, and dispersing for 35min at the rotating speed of 1500 r/min;

s400, after the raw materials are uniformly dispersed and mixed in the step S300, adding 0.2 part by mass of a drier, and dispersing for 30min at the rotating speed of 1200r/min to obtain the ceramic colored paint.

s310, sequentially adding isocyanate, methyl isobutyl ketone and 2, 2-dihydroxy methyl butyric acid into a stirrer for stirring, wherein the stirring temperature is 75 ℃, and the stirring speed is 650 r/min;

s320, adding bismuth methylsulfonate into the step S310, continuing stirring, reacting for 3 hours, then adding butanediol to continue reacting for 1.2 hours, adding ethylene glycol ethyl ether, and preserving heat for 0.5 hour to obtain a PU prepolymer;

s330, cooling the PU prepolymer in the step S320 to 40 ℃, then adding the ultrasonically treated sulfonic acid type ethylenediamine ethanesulfonic acid sodium salt, hydrophilic silicon dioxide and sodium hydroxide aqueous solution while stirring for neutralization and phase inversion, wherein the stirring speed is 1500r/min, and the stirring time is 2 h;

Example 11

A preparation method of ceramic colored paint for spraying an automotive interior ceramic panel, which is the same as the example 10, and is different from the embodiment 10 in that nano ceramic microspheres are not contained, and a preparation method of modified polyurethane resin is the same as the example 10.

Example 12

A preparation method of a ceramic colored paint for spraying an automotive interior ceramic panel, which is the same as the example 10, except that modified ceramic powder is not contained, and a preparation method of modified polyurethane resin is the same as the example 10.

The properties of the ceramic color paints prepared in examples 8-12 are shown in Table 3.

TABLE 3 Properties of the ceramic color paints of examples 8 to 12

Wherein, the adhesion refers to GB/T9286-1998 ' test for marking out paint and varnish paint film ', and the heat resistance refers to GB/T1735-89 ' method for measuring heat property of paint film

As can be seen from table 3, the adhesion and heat resistance of the ceramic color paint in example 10 are both the best, and the adhesion and heat resistance of the ceramic color paint are poorer than those of example 10 in example 11 without the nano ceramic microspheres and the adhesion of the ceramic color paint in example 12 is poorer than those of example 10, so that the nano ceramic microspheres can improve the adhesion and heat resistance of the ceramic color paint, and the adhesion of the ceramic color paint can be enhanced by the modified ceramic powder.

Examples 13 to 16

The preparation method of the ceramic colored paint for spraying the ceramic panel in the automobile interior is the same as that in example 10, except that the modified polyurethane resin is 72 parts by mass, 74 parts by mass, 76 parts by mass and 78 parts by mass, and the preparation method of the modified polyurethane resin is the same as that in example 10.

Table 4 the properties of the ceramic paints prepared in examples 13 to 16 are shown in table 4.

Table 4 shows the properties of the ceramic color paints of examples 10, 13 to 16

The drying time of the paint film is determined according to method B of GB/T1728-1979 (1989), and the impact resistance of the paint film is determined according to method GB/T1732-1993 for determining the impact resistance of the paint film

As is clear from Table 4, when the modified polyurethane resin was used in an amount of 70 parts by mass, the drying time and impact resistance were both optimum.

The foregoing has described the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.

Claims

1. An automotive interior ceramic panel, characterized in that: including the sheet metal, one side of sheet metal has set gradually passivation film layer, priming paint layer, ceramic color paint layer and ceramic finish paint layer, the opposite side of sheet metal is equipped with hot melt adhesive layer, the ceramic color paint layer adopts following raw materials preparation: 70-80 parts by mass of polyurethane resin, 15-22 parts by mass of nano ceramic microspheres, 8-12 parts by mass of ceramic powder, 1-3 parts by mass of inorganic binder, 8-10 parts by mass of bentonite, 1.2-3.5 parts by mass of feldspar powder, 3.7-5.2 parts by mass of curing agent, 0.2-0.6 part by mass of auxiliary agent and 65-90 parts by mass of deionized water; the nano ceramic microspheres comprise one or more of nano silicon dioxide microspheres and nano titanium dioxide microspheres, and the particle size of the nano ceramic microspheres is 20-30 nm; the ceramic powder comprises one or more of nano silicon dioxide powder and nano titanium dioxide powder, and the particle size of the ceramic powder is 45-60 nm.

2. The automotive interior ceramic panel of claim 1, wherein: the auxiliary agent comprises an anti-settling agent, a drier and a toughening agent, and the anti-settling agent, the drier and the toughening agent are in a ratio of 1:2:1 in parts by mass.

3. The automotive interior ceramic panel of claim 2, wherein: the anti-settling agent is one or more of polyethylene wax and polyamide wax.

4. The automotive interior ceramic panel of claim 2, wherein: the drier is dibutyltin dilaurate.

5. The automotive interior ceramic panel of claim 2, wherein: the toughening agent is one or more of ethylene propylene rubber, polybutadiene rubber, methyl methacrylate-butadiene-styrene terpolymer, ethylene-vinyl acetate copolymer, glass fiber and carbon fiber.

6. The automotive interior ceramic panel of claim 1, wherein: the inorganic binder is one or more of silicate, gypsum powder, putty powder and water glass.

7. The automotive interior ceramic panel of claim 1, wherein: the curing agent is one or more of aliphatic isocyanate, vinyl triamine, m-phenylenediamine and diaminodiphenylmethane.