CN115515268A

CN115515268A - Electroluminescent paint for inner and outer ornaments of automobile and preparation method thereof

Info

Publication number: CN115515268A
Application number: CN202110633478.8A
Authority: CN
Inventors: 毕思远; 薛依虹; 刘飞
Original assignee: Yanfeng Plastic Omnium Automotive Exterior Systems Co Ltd
Current assignee: Yanfeng Plastic Omnium Automotive Exterior Systems Co Ltd
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2022-12-23

Abstract

The invention provides electroluminescent paint for interior and exterior trimming parts of an automobile, which is arranged on the front surface or the back surface of a base material, wherein the base material is provided with a light-emitting area and a positive and negative electrode boundary area comprising a surrounding part and two epitaxial parts; the composite luminous coating comprises an electrode layer, a luminous layer, an insulating layer and a conductive layer which are sequentially arranged along the visual direction; the manufacturing region of the electrode layer is spaced apart from the epitaxial portions and all regions between the two epitaxial portions are removed; the manufacturing area of the light-emitting layer is a light-emitting area; the manufacturing area of the insulating layer is all areas; the manufacturing area of the conducting layer is all areas except the positive and negative electrode boundary area. The invention also provides a corresponding preparation method. The electroluminescent paint provided by the invention meets the light-emitting requirement of the interior and exterior trimming parts of the automobile and avoids short circuit through the arrangement of the manufacturing areas of the electrode layer, the light-emitting layer and the conductive layer, and the preparation method of the transparent substrate back construction process effectively solves the problems of weather resistance, stone impact resistance and poor adhesion of the electroluminescent paint.

Description

Electroluminescent paint for inner and outer ornaments of automobile and preparation method thereof

Technical Field

The invention belongs to the field of internal and external ornaments of automobiles, and particularly relates to electroluminescent paint for internal and external ornaments of an automobile.

Background

At present, the electroluminescent paint is very rare in the market, is tried to be used in partial fields such as luminescent billboards, luminescent vests and other tiny fields, and has no precedent for use in the automobile field, mainly because the electroluminescent paint is slow in development, no clear construction route is available in the market, and the traditional front construction route has poor performance in tests such as weather resistance, stone impact resistance, adhesive force and the like, is difficult to reach the mass production standard, and is not suitable for the automobile field. There is currently no electroluminescent paint for automobiles (e.g., interior or exterior trim parts of automobiles).

In order to fill the blank of the electroluminescence technology in the automobile field, a process route for applying the electroluminescence paint in the automobile interior and exterior decoration field is urgently needed.

Disclosure of Invention

The invention aims to provide an electroluminescent paint for inner and outer ornaments of an automobile and a preparation method thereof, so as to fill the blank of an electroluminescent technology in the field of automobiles.

In order to achieve the above object, the present invention provides an electroluminescent paint for interior and exterior parts of an automobile, which is disposed on the front or back of a substrate, and comprises a composite luminescent coating layer, wherein the substrate has a luminescent region and a positive and negative electrode boundary region located at the periphery of the luminescent region; the positive and negative electrode boundary area comprises a surrounding part surrounding the light-emitting area in a form of a notch and two extending parts which are arranged at two ends of the notch and extend outwards to the edge of the base material in parallel; the composite luminous coating comprises an electrode layer, a luminous layer, an insulating layer and a conductive layer which are sequentially arranged along the visual direction; the manufacturing region of the electrode layer is separated from the epitaxial parts by a coverage threshold value and all regions on the substrate between the two epitaxial parts are removed; the manufacturing area of the luminous layer is a luminous area and a whole or partial surrounding part; the manufacturing area of the insulating layer is all areas of the whole substrate; the manufacturing area of the conducting layer is all areas on the base material except the positive and negative electrode demarcation areas.

The front surface of the composite luminous coating is provided with a coating of conventional paint with patterns.

The coating of the conventional paint with the patterns is prepared by spraying the conventional paint and radium carving the patterns needing to emit light; or the coating layer of the conventional paint with patterns is prepared by manufacturing a conventional paint mask according to the patterns needing to emit light, pasting, spraying the conventional paint, and then tearing off the conventional paint mask.

The composite luminous coating is positioned on the back of the base material, the base material is a transparent base material, and the coating of the conventional paint is arranged between the composite luminous coating and the base material.

The composite luminous coating is positioned on the front surface of the base material, and the base material is a transparent base material or a non-transparent base material.

And a transparent sealing layer is arranged on the front surface of the composite luminous coating.

The light-emitting area is rectangular, and the periphery of the light-emitting area is located at a fixed distance away from the periphery of the pattern needing light emission.

The electrode layer is made of transparent electric conduction materials, and the thickness of the electrode layer is 0.03-0.1mm; the material of the luminescent layer is electroluminescent material, and the thickness of the luminescent layer is 0.03-0.1mm; the thickness of the insulating layer is 0.07-0.15mm; the conducting layer is made of metal materials, and the thickness of the conducting layer is 0.07-0.15mm.

In another aspect, the present invention provides a method for preparing an electroluminescent paint for interior and exterior parts of an automobile, comprising:

s1: determining the size of a light-emitting area on the back of the substrate according to a pattern required to emit light, and manufacturing a coating layer of conventional paint with a pattern; the method comprises the steps that a positive and negative electrode boundary area is predetermined on the periphery of a light-emitting area, and the positive and negative electrode boundary area comprises a surrounding part surrounding the light-emitting area in a form of a notch and two extending parts which are arranged at two ends of the notch and extend outwards to the edge of a base material in parallel;

s2: a first mask for covering the two epitaxial parts and the space between the two epitaxial parts is manufactured according to the positive and negative electrode boundary regions;

s3: manufacturing an electrode layer, wherein the manufacturing area of the electrode layer is a covering threshold value which is separated from the epitaxial parts, and all areas on the substrate between the two epitaxial parts are removed;

s4: removing the first mask;

s5: making a second mask for shielding all areas except the light-emitting area and all or part of the surrounding part;

s6: manufacturing a light-emitting layer, wherein the manufacturing area of the light-emitting layer is a light-emitting area and a whole or partial surrounding part;

s7: removing the second mask;

s8: manufacturing an insulating layer, wherein the manufacturing area of the insulating layer is all areas of the whole substrate;

s9: manufacturing a positive and negative electrode boundary mask according to the positive and negative electrode boundary area;

s10: manufacturing a conducting layer, wherein the manufacturing area of the conducting layer is all areas on the base material except the positive and negative electrode boundary areas;

s11: removing the positive and negative boundary masks;

s12: two conductive areas of the conductive layer spaced apart from each other are connected to the positive and negative electrodes of a power supply, respectively, to detect the light emission effect by energization.

s1: determining the size of a light-emitting region on the front side of the base material according to a pattern required to emit light; the method comprises the steps that a positive and negative electrode boundary area is predetermined on the periphery of a light-emitting area, and the positive and negative electrode boundary area comprises a surrounding part surrounding the light-emitting area in a mode of having a notch and two extending parts which are arranged at two ends of the notch and extend outwards to the edge of a base material in parallel;

s2: manufacturing a positive and negative electrode boundary mask according to the positive and negative electrode boundary area;

s3: manufacturing a conducting layer, wherein the manufacturing area of the conducting layer is all areas on the base material except the positive and negative electrode boundary areas;

s4: removing the positive and negative boundary mask;

s5: manufacturing an insulating layer, wherein the manufacturing area of the insulating layer is all areas of the whole substrate;

s6: making a second mask for shielding all areas except the light-emitting area and all or part of the surrounding part;

s7: manufacturing a light-emitting layer, wherein the manufacturing area of the light-emitting layer is a light-emitting area and a whole or partial surrounding part;

s8: removing the second mask;

s9: manufacturing a first mask for covering the two epitaxial parts and the two epitaxial parts;

s10: manufacturing an electrode layer, wherein the manufacturing area of the electrode layer is a covering threshold value which is separated from the epitaxial parts, and all areas on the substrate between the two epitaxial parts are removed;

s11: removing the first mask;

s12: connecting two conductive areas spaced apart from each other of the conductive layers with a positive electrode and a negative electrode of a power supply respectively to detect the light-emitting effect by electrifying;

s13: and (5) preparing a coating of the conventional paint with patterns.

The electroluminescent paint for the inner and outer ornaments of the automobile is applied in the automobile industry for the first time, and meets the luminous requirements of the inner and outer ornaments of the automobile and avoids short circuit through the arrangement of the manufacturing areas of the electrode layer, the luminous layer and the conductive layer. In addition, the setting of the relevant construction process and the film thickness can meet the light-emitting requirement of the interior and exterior trim parts of the automobile, and the light-emitting requirement comprises the step of ensuring the adhesive force between paint and a base material by setting the specific film thickness so as to meet the requirements of most whole automobile factories.

The preparation method of the electroluminescent paint for the inner and outer ornaments of the automobile can adopt two construction processes; a construction process of the front surface of the non-transparent/transparent base material and a construction process of the back surface of the transparent base material. The back construction process of the transparent material is opposite to the conventional front construction process, and the process is initiated internationally, and the base material is arranged outside the electroluminescent paint, so that the problems of weather resistance, stone impact resistance and poor adhesion of the electroluminescent paint can be effectively solved, and the transparent material has obvious advantages in the aspects of durability and popularization. The method for improving the adhesive force and the weather resistance through the related construction temperature, the film thickness requirement, the base material polishing and the like is used for meeting the product requirement of the automobile industry.

Drawings

Fig. 1 to 2 are schematic side view structures of portions of a light emitting region of an electroluminescent paint for interior and exterior parts of an automobile according to a first embodiment and a second embodiment of the present invention, respectively, in which fig. 1 specifically illustrates a case of back side construction of a transparent substrate, and fig. 2 illustrates a case of front side construction of a transparent/non-transparent substrate.

Fig. 3 is a flowchart of a method for preparing an electroluminescent paint for interior and exterior parts of an automobile according to a third embodiment of the present invention, which shows a case where a transparent substrate is constructed on the back side.

Fig. 4 is a flowchart of a method for preparing an electroluminescent paint for interior and exterior parts of an automobile according to a fourth embodiment of the present invention, which shows a case where a transparent/non-transparent substrate is constructed on the front surface.

Fig. 5A to 5E are schematic diagrams of various links of the method for preparing the electroluminescent paint for interior and exterior parts of an automobile as shown in fig. 3, wherein fig. 5A shows the size of a light-emitting region, fig. 5B shows a fabrication region of a first mask and an electrode layer, fig. 5C shows a fabrication region of a second mask and a light-emitting layer, fig. 5D shows a fabrication region of an insulating layer, and fig. 5E shows fabrication regions of a positive and negative electrode boundary mask and a conductive layer.

Fig. 6A to 6D are schematic diagrams of various links of the method for preparing the electroluminescent paint for interior and exterior parts of an automobile as shown in fig. 4, wherein fig. 6A shows the size of a light emitting region, fig. 6B shows the fabrication regions of a positive and negative electrode boundary mask and a conductive layer, fig. 6C shows the fabrication regions of a second mask and a light emitting layer, and fig. 6D shows the fabrication regions of a first mask and an electrode layer.

Detailed Description

The following description of the preferred embodiments of the present invention is provided in conjunction with the accompanying drawings and will be described in detail.

Fig. 1 to 2 are schematic side view structures of portions of light emitting areas of electroluminescent paints for interior and exterior parts of automobiles according to two embodiments of the present invention, in which fig. 1 specifically shows a case of back construction of a transparent substrate, and fig. 2 shows a case of front construction of a transparent/non-transparent substrate.

As shown in fig. 1-2, an electroluminescent paint is disposed on the front or back side of a substrate 10, including a composite luminescent coating, according to two embodiments of the present invention. The electroluminescent paint also includes a patterned coating of conventional paint (not shown) disposed on the front side of the composite luminescent coating. The composite luminescent coating is shown in fig. 1-2, and comprises an electrode layer 1, a luminescent layer 2, an insulating layer 3 and a conductive layer 4 which are sequentially arranged along a visual direction 100. Here, the front and back surfaces are both the front and back surfaces with respect to the visual direction 100.

As shown in fig. 1, according to the first embodiment of the present invention, the composite luminescent coating layer is located on the back surface of the substrate 10, and the substrate 10 is a transparent substrate, that is, the back surface construction of the transparent substrate is realized; a coating of conventional paint (not shown) is provided between the composite luminescent coating and the substrate 10. The substrate 10 has a light-emitting region 101 and a positive-negative electrode boundary region located at the periphery of the light-emitting region 101; the light-emitting area is rectangular, and the periphery of the light-emitting area is positioned at a fixed distance outside the periphery of the pattern needing to emit light; the positive and negative boundary region includes a surrounding portion 1021 surrounding the light emitting region in a form of a notch (i.e. surrounding the light emitting region in a C-shape), and two extending portions 1022 disposed at two ends of the notch and extending outward to the edge of the substrate 10 in parallel, in this embodiment, the widths of the surrounding portion 1021 and the extending portions 1022 are both at least 3mm, the distance between the outer side of the surrounding portion 1021 and the edge of the substrate 10 is at least 10mm, and the distance between the two extending portions 1022 is at least 10mm. The electrode layer 1 is fabricated in an area spaced apart from the epitaxial portions 1022 by a coverage threshold d1 and removing all areas on the substrate 10 between the two epitaxial portions 1022. The light emitting layer 2 is formed in a light emitting region and a whole or a part of the surrounding portion 1021. The insulating layer 3 is formed over the entire substrate 10, or over the light-emitting region and all or part of the surrounding portion 1021. The manufacturing area of the conductive layer 4 is all areas on the base material 10 except the positive and negative electrode boundary areas.

As shown in fig. 2, according to the second embodiment of the present invention, the composite luminescent coating layer is located on the front surface of the substrate 10, and the substrate 10 is a transparent substrate or a non-transparent substrate, i.e. the front surface construction of the transparent/non-transparent substrate is realized. Meanwhile, the front surface of the composite luminous coating can be provided with a transparent sealing layer 5 to play a role in beauty and protection.

The substrate 10 has a light-emitting region 101 and a positive-negative electrode boundary region located at the periphery of the light-emitting region 101; the light-emitting area is rectangular, and the periphery of the light-emitting area is positioned at a fixed distance outside the periphery of the pattern needing to emit light; the positive and negative electrode boundary region includes a surrounding portion 1021 surrounding the light emitting region in a form of a notch, and two extending portions 1022 disposed at two ends of the notch and extending outward to the edge of the substrate 10 in parallel. The fabrication region of the electrode layer 1 is the fabrication region of the electrode layer 1 that is spaced apart from the epitaxy portions 1022 by a coverage threshold and removes all regions on the substrate 10 between the two epitaxy portions 1022. The light-emitting layer 2 is formed in a light-emitting region (and all or part of the surrounding portion 1021). The insulating layer 3 is formed over the entire substrate 10, or over the light-emitting region and all or part of the surrounding portion 1021. The manufacturing area of the conductive layer 4 is all areas on the base material 10 except the positive and negative electrode boundary areas. The seal layer 5 is formed in all regions of the entire substrate 10.

In the above two embodiments, the substrate 10 refers to an insulating material to be applied, the transparent substrate refers to a transparent insulating material to be applied, and the transparent substrate includes transparent PC, glass, and the like. The electrode layer 1 is made of transparent electrically conductive material, such as ITO (In) ₂ O ₃ Sn) is a commonly used transparent conductive material. A layer of 300-500nm thick ITO film typically has a thickness of 10 ^-4 Resistivity of Ω cm, square resistance of-5 Ω, and transparency of-90%. The material of the light-emitting layer 2 is electroluminescent material, and the most important performance of the electroluminescent material comprises brightness (cd/m) ² ) Efficiency (lm/W) and ageChange time (aging). Electroluminescent materials consisting essentially of (1) ZnS: mn; (2) SrS: ce; (3) SrS: cu and SrS: ag, cu; (4) rare earth element doped ZnS; (5) thioglycolates (Thiogallates); (6) other alkaline earth metal sulfides; (7) any one or more of oxides and the like. The material of the insulating layer 3 is required to have high dielectric strength without pinhole phenomenon, wherein the dielectric strength is preferably more than 2.6. Not only is the dielectric strength important, but it is also desirable to maximize the charge density stored in the dielectric layer, and thus define ε ₀ 、ε _r 、E _BD In which epsilon ₀ And ε _r Respectively vacuum and relative dielectric constant, E _BD Is the breakdown field strength. The material of the conductive layer 4 can be silver liquid, aluminum liquid, copper liquid and other metal materials; the requirements for the metal material include a low resistivity (and preferably a resistivity greater than 1.7 x 10) ^-8 Euro-meter), good adhesion properties, low mobility under strong electric fields, and good imaging.

Third embodiment preparation method of electroluminescent paint for interior and exterior parts of automobile using transparent substrate backside construction process

The preparation method of the electroluminescent paint for the inner and outer ornaments of the automobile is described in detail below by taking YFP as a luminescent pattern, the back construction of a transparent base material and a laser etching pattern as examples.

As shown in fig. 3, the preparation method of the electroluminescent paint for the interior and exterior trim parts of the automobile adopts a transparent substrate back construction process, and specifically comprises the following steps:

step S1: determining the size of a light emitting region 101 according to a pattern to be emitted on the back surface of the substrate 10, and making a coating layer of a conventional paint with a pattern; a positive and negative boundary area is predetermined on the periphery of the light emitting area 101, and the positive and negative boundary area includes a surrounding portion 1021 surrounding the light emitting area in a form of a notch and two extending portions 1022 disposed at two ends of the notch and extending outward to the edge of the substrate 10 in parallel.

In this example, the coating of the conventional paint with patterns was made by spraying the conventional paint and then laser etching the desired luminescent pattern.

The size of the light-emitting region is required to be as shown in fig. 5A, the light-emitting region is rectangular, and the periphery of the light-emitting region is located at a fixed distance outside the periphery of the pattern to be illuminated, so that the light-emitting pattern can be perfectly covered, and the occurrence of dead angles of illumination is avoided. In the present embodiment, the fixed distance is 5mm or more.

In this embodiment, the substrate 10 is a transparent substrate, and the conventional paint is not part of the composite luminescent coating, but is a paint that is commonly used for automobile exterior parts to perform decoration and beautification functions.

In laser etching, the etched paint is not part of the composite luminescent coating, but is a conventional paint. In this embodiment, the pattern of desired luminescence is laser etched to be a "YFPO" pattern, so the laser etch removes the material of the conventional paint in the "YFPO" pattern portion. It should be noted that the laser etching is not related to the composite luminescent coating, and only simply etches out a pattern needing light transmission of a transparent substrate sprayed with color (i.e. conventional paint) to remove the conventional paint at the pattern, and the position without light emission keeps the state with the conventional paint not to transmit light.

Step S2: as shown in fig. 5B, the first mask 103 (masking) for covering the two epitaxial portions 1022 and between the two epitaxial portions 1022 is formed according to the positive and negative boundary regions, so as to shield the position of the positive electrode of the conductive layer 4 and prevent the electrode layer 1 from covering the position of the positive electrode of the conductive layer 4. Therefore, the position of the conducting layer 4 is not polluted by other coatings, and the position is convenient to be electrified in the later period.

The inner boundary of the surrounding portion 1021 of the positive and negative electrode boundary mask 102 coincides with the outer boundary of the light-emitting region. The position between the extensions 1022 is the position of the positive electrode of the conductive layer 4 to be provided later (i.e., the + electrode position), and therefore, the position of the first mask is as shown in the grid region in fig. 5B, and the coverage of the first mask 103 includes the extensions 1022 of the positive and negative boundary masks 102, the position between the extensions 1022, and also exceeds the extension 1022 by a coverage threshold, which is usually 3mm or more, so as to ensure that the electrode layer 1 does not cover the positions between the extensions 1022 of the positive and negative boundary masks 102 and the position between the extensions 1022. In this embodiment, the first mask 103 is an adhesive tape, and generally, a low-viscosity adhesive tape is selected, and commonly used art dividing adhesive tapes, car spray art paper, flame retardant adhesive tapes, and the like. The positive and negative electrode boundary masks 102 are made of the same material as the first mask 103.

And step S3: an electrode layer 1 is produced. The fabrication area of the electrode layer 1 is all areas except the first mask 103 (shown as the grid line area in fig. 5B), i.e., the fabrication area of the electrode layer 1 is all areas on the substrate 10 spaced apart from the epitaxy portions 1022 by a coverage threshold and removed between the two epitaxy portions 1022.

The thickness of the electrode layer 1 is 0.03 to 0.1mm. The electrode layer 1 is prepared by spraying paint on the electrode layer 1 and baking at 40-80 ℃ for 5-20 min. In the present embodiment, it is preferably 0.05mm; the luminescent layer 2 is prepared by spraying paint for the luminescent layer 2 and baking at 60 ℃ for 10 min. The electrode layer 1 is made of a transparent electrically conductive material, such as ITO (In) ₂ O ₃ :Sn)。

The main function of the electrode layer 1 is to form an electric field in cooperation with the conductive layer 4.

And step S4: removing the first mask 103 as shown by the grid line regions in fig. 5B;

step S5: making a second mask 104 (as shown in fig. 5C) for shielding the area except the light-emitting area (and all or part of the surrounding portion 1021);

the second mask 104 is used to determine the position of the light-emitting layer 2, and further determines whether the area emits light, and the second mask 104 is used to shield the area outside the light-emitting area, so that the paint spraying position of the light-emitting layer 2 can be ensured to be only in the light-emitting area. In this embodiment, the position of the second mask 104 does not include the surrounding portion 1021 of the positive and negative boundary regions, or only includes a part of the surrounding portion 1021, for example, the gap between the inner boundary of the second mask 104 and the outer edge of the positive and negative boundary mask 102 is about 0.5-1mm, so that the second mask 104 includes the surrounding portion 1021 of the positive and negative boundary regions to prevent the problems of insufficient light emitting region, short circuit, and the like.

Step S6: the light-emitting layer 2 is produced. The main function of the light-emitting layer 2 is to emit light by electron impact under the influence of an electric field. Since the fabrication region of the light emitting layer 2 is all regions except the second mask 104, the fabrication region of the light emitting layer 2 is a light emitting region and all or part of the surrounding portion 1021.

The film thickness of the luminescent layer 2 is 0.03-0.1mm, and the luminescent layer 2 is prepared by spraying paint of the luminescent layer 2 and baking for 5-20min at 40-80 ℃. In the present embodiment, the film thickness of the light-emitting layer 2 is preferably 0.05mm; the luminescent layer 2 is prepared by spraying paint for the luminescent layer 2 and baking at 60 ℃ for 10 min. The material of the light-emitting layer 2 is an electroluminescent material, and the most important property of the electroluminescent material comprises luminance (cd/m) ² ) Efficiency (lm/W) and aging time (aging). Electroluminescent materials mainly include (1) ZnS: mn; (2) SrS: ce; (3) SrS is Cu and SrS is Ag and Cu; (4) rare earth element doped ZnS; (5) thioglycolates (Thiogallates); (6) other alkaline earth metal sulfides; (7) any one or more of oxides and the like.

Step S7: the second mask 104 is removed.

In the embodiment, the second mask 104 is an adhesive tape, and generally, a low-viscosity adhesive tape is selected, and commonly used art dividing adhesive tapes, car spray art paper, flame retardant adhesive tapes, and the like. Step S7 is thus to remove the tape in the area of the second mask 104;

step S8: an insulating layer 3 is produced. The insulating layer 3 mainly serves as an insulator, so that an electric field is formed between the electrode layer 1 and the conductive layer 4. The formation region of the insulating layer 3 is all regions of the entire substrate 10 as indicated by a black frame in fig. 5D.

The film thickness of the insulating layer 3 is 0.07-0.15mm, and the insulating layer 3 is prepared by spraying paint on the insulating layer 3 and baking for 15-25min at 40-80 ℃. In this example, the insulating layer 3 is preferably 0.1mm thick, and the insulating layer 3 is baked at 60 ℃ for 20 min.

Step S9: manufacturing a positive and negative electrode boundary mask 102 shown in fig. 5E according to the positive and negative electrode boundary region;

therefore, the boundary line of the positive electrode and the negative electrode can be shielded, and the positive electrode and the negative electrode can be distinguished. The positive and negative boundary mask 102 is made as the positive and negative boundary area, and the positive and negative boundary area includes the surrounding portion 1021 surrounding the light emitting area in the form of a notch and two extending portions 1022 disposed at two ends of the notch and extending outward to the edge of the substrate 10 in parallel as shown by the dotted line in fig. 5D.

In this embodiment, the positive and negative electrode boundary masks 102 are adhesive tapes, and generally, low-viscosity adhesive tapes are selected, and commonly used art boundary tapes, car spray art paper, flame-retardant adhesive tapes, and the like.

Step S10: manufacturing a conductive layer 4; the main function of the conductive layer 4 is to form an electric field with the electrode layer 1. The manufacturing area of the conductive layer 4 is all areas on the base material 10 except the positive and negative electrode boundary areas.

The thickness of the conductive layer 4 is 0.07-0.15mm, and the conductive layer 4 is manufactured by spraying paint on the conductive layer 4 and baking for 15-25min at 40-80 ℃. In this example, the conductive layer 4 is preferably 0.1mm thick, and the conductive layer 4 is formed by baking at 60 ℃ for 20 min.

The positive and negative polarity boundary mask 102 is shown as a grid line in fig. 5E, and the resulting conductive layer 4 includes two conductive areas spaced apart from each other, one of the conductive areas for connecting to the positive polarity of the power supply and the other conductive area for connecting to the negative polarity of the power supply.

Step S11: removing the positive and negative polarity boundary mask 102 (i.e., the grid lines in fig. 5E);

in this embodiment, the positive and negative electrode boundary masks 102 are adhesive tapes, and generally, low-viscosity adhesive tapes are selected, and commonly used art boundary tapes, car spray art paper, flame-retardant adhesive tapes, and the like. Therefore, step S11 is to tear off the adhesive tape in the positive and negative electrode boundary mask 102 region;

step S12: two conductive regions of the conductive layer 4 spaced apart from each other are connected to the positive and negative electrodes of a power supply, respectively, to detect the light emission effect by energization (the positive and negative electrodes may be reversed).

In this embodiment, the resistance of the conductive region connected to the negative electrode of the power supply should not be greater than 60 ohms, and the resistance of the conductive region connected to the positive electrode of the power supply should not be greater than 20 ohms. On the other hand, the electrode layer 1 is not directly connected to an external power source, and only two conductive regions of the conductive layer 4 are connected to the positive and negative electrodes of the external power source.

Fourth embodiment preparation method of electroluminescent paint for interior and exterior parts of automobile using transparent or non-transparent substrate front surface construction process

As shown in fig. 4, the preparation method of the electroluminescent paint for the interior and exterior trim parts of the automobile adopts a transparent or non-transparent substrate front construction process, and specifically comprises the following steps:

step S1: on the front side of the substrate 10, the size of the light emitting region 101 is determined according to a pattern of desired light emission; a positive and negative boundary area is predetermined on the periphery of the light emitting area 101, and the positive and negative boundary area includes a surrounding portion 1021 surrounding the light emitting area in a form of a notch and two extending portions 1022 disposed at two ends of the notch and extending outward to the edge of the substrate 10 in parallel.

The inner boundary of the surrounding portion 1021 of the positive and negative electrode boundary mask 102 coincides with the outer boundary of the light-emitting region.

The size of the light-emitting region is required to be as shown in fig. 6A, the light-emitting region is rectangular, and the periphery of the light-emitting region is located at a fixed distance outside the periphery of the pattern to be illuminated, so that the light-emitting pattern can be perfectly covered, and dead angles of illumination can be avoided. In this embodiment, the fixed distance is 5mm or more.

Step S2: manufacturing a positive and negative electrode boundary mask 102 according to the positive and negative electrode boundary area;

therefore, the positive and negative electrode boundary mask 102 can shield the positive and negative electrode boundary lines to distinguish the positive and negative electrodes. The positive and negative electrode boundary regions are as described above and shown by the grid lines in fig. 6B, and include the surrounding portion 1021 surrounding the light emitting region in a form of a notch, and two extending portions 1022 disposed at two ends of the notch and extending outward to the edge of the substrate 10 in parallel.

And step S3: manufacturing a conductive layer 4; the main function of the conductive layer 4 is to form an electric field with the electrode layer 1. The manufacturing area of the conductive layer 4 is all areas on the base material 10 except the positive and negative electrode boundary areas.

The positive and negative polarity demarcation mask 102 is shown in grid lines in fig. 6B, and the resulting conductive layer 4 includes two conductive areas spaced apart from each other, one for connecting to the positive polarity of the power supply and the other for connecting to the negative polarity of the power supply.

And step S4: removing the positive and negative boundary masks 102 (i.e., the grid lines in fig. 6B);

in step S4, the method further includes: then, after the positive and negative electrode boundary masks 102 are taken out, boundary polishing is carried out, the boundary positions are slightly raised, and 800-mesh abrasive paper is used for polishing; the adhesive tape has bulges on the boundary, and the boundary is polished to be smooth and attractive.

Step S5: an insulating layer 3 is produced. The insulating layer 3 mainly serves as an insulator, so that an electric field is formed between the electrode layer 1 and the conductive layer 4. The insulating layer 3 is formed over the entire area of the substrate 10.

Step S6: a second mask 104 for shielding all regions except the light-emitting region and all or part of the surrounding portion 1021 is formed (as shown in fig. 6C);

the second mask 104 is used to determine the position of the luminescent layer 2, and further determines whether the area emits light, and the second mask 104 is used to shield the area other than the area emitting light, so that the paint spraying position of the luminescent layer 2 can be ensured to be only in the luminescent area. In this embodiment, the position of the second mask 104 does not include the surrounding portion 1021 of the positive and negative boundary regions, or only includes a part of the surrounding portion 1021, for example, the gap between the inner boundary of the second mask 104 and the outer edge of the positive and negative boundary mask 102 is about 0.5-1 mm.

Step S7: the light-emitting layer 2 is produced. The main function of the light emitting layer 2 is to emit light by electron collision under the action of an electric field, and the light emitting layer 2 is formed in all regions except the second mask 104, that is, in the light emitting region and all or part of the surrounding portion 1021.

The film thickness of the luminous layer 2 is 0.03-0.1mm, and the luminous layer 2 is prepared by spraying paint on the luminous layer 2 and baking for 5-20min at 40-80 ℃. In the present embodiment, the film thickness of the light-emitting layer 2 is preferably 0.05mm; the luminescent layer 2 is prepared by spraying paint for the luminescent layer 2 and baking at 60 ℃ for 10 min. The material of the light-emitting layer 2 is electroluminescent material, and the most important performance of the electroluminescent material comprises brightness (cd/m) ² ) Efficiency (lm/W) and aging time (aging). Electroluminescent materials consisting essentially of (1) ZnS: mn; (2) SrS: ce; (3) SrS is Cu and SrS is Ag and Cu; (4) rare earth element doped ZnS; (5) thioglycolates (Thiogallates); (6) other alkaline earth metal sulfides; (7) any one or more of oxides and the like.

Step S8: the second mask 104 is removed (as shown in fig. 6C).

In the embodiment, the second mask 104 is an adhesive tape, and generally, a low-viscosity adhesive tape is selected, and commonly used art dividing adhesive tapes, car spray art paper, flame retardant adhesive tapes, and the like. Step S7 is thus to remove the adhesive tape from the area of the second mask 104;

step S9: as shown in fig. 6D, a first mask 103 (masking) is formed to cover the two epitaxial portions 1022 and between the two epitaxial portions 1022, thereby shielding the position of the forward electrode of the conductive layer 4 and preventing the electrode layer 1 from covering the position of the forward electrode of the conductive layer 4. Therefore, the position of the conducting layer 4 is not polluted by other coatings, and the position is convenient to be electrified in the later period.

The inner boundary of the surrounding portion 1021 of the positive and negative electrode boundary mask 102 coincides with the outer boundary of the light emitting region. The position between the extensions 1022 is the position of the forward electrode of the conductive layer 4 to be provided later (i.e., the + pole position), and therefore, the position of the first mask is as shown in the grid region in fig. 6D, and the coverage of the first mask 103 includes the extensions 1022 of the positive and negative boundary masks 102, the position between the extensions 1022, and also exceeds the extension 1022 by a coverage threshold, which is usually 3mm or more, so as to ensure that the electrode layer 1 does not cover the positions between the extensions 1022 of the positive and negative boundary masks 102 and the position between the extensions 1022. In this embodiment, the first mask 103 is an adhesive tape, and generally, a low-viscosity adhesive tape is selected, and commonly used art dividing adhesive tapes, car spray art paper, flame retardant adhesive tapes, and the like. The positive and negative electrode boundary masks 102 are made of the same material as the first mask 103.

Step S10: an electrode layer 1 is produced. The fabrication area of the electrode layer 1 is all areas except the first mask 103 (shown as the grid line area in fig. 6D), i.e., the fabrication area of the electrode layer 1 is all areas on the substrate 10 spaced apart from the epitaxy portions 1022 by a coverage threshold and removed between the two epitaxy portions 1022.

Step S11: removing the first mask 103 as shown by the grid line regions in fig. 6D;

In this embodiment, the resistance of the conductive region connected to the negative electrode of the power supply must not be greater than 60 ohms, and the resistance of the conductive region connected to the positive electrode of the power supply must not be greater than 20 ohms. On the other hand, the electrode layer 1 is not directly connected to an external power source, and only two conductive regions of the conductive layer 4 are connected to the positive and negative electrodes of the external power source.

Step S13: and (5) preparing a coating of the conventional paint with patterns.

In step S13, the coating of the conventional paint with patterns is made by a "button" drawing method.

In step S13, a coating layer of the conventional paint with a pattern is prepared by making a conventional paint mask according to the pattern of the desired luminescence and pasting, spraying the conventional paint, and then removing the conventional paint mask.

Conventional paint masks are also tape masks. In this embodiment, a character (for example, "YFPO") needs to be lighted, and therefore a conventional paint mask having a character (for example, "YFPO") needs to be attached to the light-emitting position to shield the letter portion to be lighted, leaving only the frame portion for conventional paint spraying. Similarly, the method of laser engraving the desired luminescent pattern in the third embodiment is also a "snap" pattern method.

In this embodiment, the substrate 10 is a transparent or non-transparent substrate.

The conventional paint is not part of the composite luminous coating, but is paint which is commonly used for automobile exterior trimming parts and has the decoration and beautifying effects, the color and the material are determined according to the requirements of the whole automobile factory, the material is not required to be limited, and the paint can be attached to the surface of a base material and has good adhesive force. Conventional paints are usually black paints to provide a higher shading effect.

Further, the step S13 may further include: after tearing off the conventional paint mask, a seal 5 is made of transparent varnish for protection.

The varnish sprayed on the surface of the automobile body is defined according to the appearance and performance requirements of a whole automobile factory, generally has the same performance with the transparent varnish sprayed on plastic parts on the surface of the automobile body, and plays a role in beauty and protection.

In the present invention, the application of the various paints is performed over the entire substrate 10, with masking being accomplished by a mask.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the present invention. For example, in the present invention, the spraying process may be replaced with a painting process; the adhesive tapes used by various masks can be replaced by shielding films, magic slices, masks and other articles with shielding effect; the conventional paint coating can be made by using a 'spraying' drawing method instead of a 'buckling' drawing method, for example, a shielding slice which only keeps the outer part of the frame of the pattern is attached before the paint spraying of the conductive layer 4/the luminous layer 2, so that the manufacturing area of the conductive layer 4/the luminous layer 2 is only the pattern part needing to be lightened. All simple and equivalent changes and modifications made according to the claims and the content of the specification of the present application fall within the scope of the claims of the present patent application. The invention has not been described in detail in order to avoid obscuring the invention.

Claims

1. An electroluminescent paint for interior and exterior trimming parts of an automobile is arranged on the front or back of a base material (10), and is characterized by comprising a composite luminescent coating, wherein the base material (10) is provided with a luminescent region (101) and a positive and negative electrode boundary region positioned on the periphery of the luminescent region (101); the positive and negative electrode boundary area comprises a surrounding part (1021) surrounding the light-emitting area in a form of a notch and two extension parts (1022) which are arranged at two ends of the notch and extend outwards to the edge of the base material (10) in parallel; the composite luminous coating comprises an electrode layer (1), a luminous layer (2), an insulating layer (3) and a conducting layer (4) which are sequentially arranged along the visual direction; the manufacturing area of the electrode layer (1) is separated from the epitaxial portions (1022) by a coverage threshold value, and all areas on the substrate (10) between the two epitaxial portions (1022) are removed; the manufacturing area of the light-emitting layer (2) is a light-emitting area and a whole or partial surrounding part (1021); the manufacturing area of the insulating layer (3) is all areas of the whole substrate (10); the manufacturing area of the conducting layer (4) is all areas on the base material (10) except the positive and negative electrode boundary areas.

2. The electroluminescent paint for interior and exterior automotive parts according to claim 1, wherein the front surface of the composite luminescent coating layer is provided with a patterned coating layer of a conventional paint.

3. The electroluminescent paint for interior and exterior parts of an automobile according to claim 2, wherein the coating layer of the conventional paint with a pattern is prepared by spraying the conventional paint and then radium-engraving a pattern required to emit light; or the coating layer of the conventional paint with patterns is prepared by manufacturing a conventional paint mask according to the patterns needing to emit light, pasting, spraying the conventional paint, and then tearing off the conventional paint mask.

4. The electroluminescent paint for interior and exterior trimmings of an automobile according to claim 2, wherein the composite luminescent coating layer is located on the back of the substrate (10), the substrate (10) is a transparent substrate, and a coating layer of a conventional paint is provided between the composite luminescent coating layer and the substrate (10).

5. The electroluminescent paint for interior and exterior trims of automobiles according to claim 1 or 2, wherein the composite luminescent coating layer is located on the front surface of the substrate (10), and the substrate (10) is a transparent substrate or a non-transparent substrate.

6. The electroluminescent paint for interior and exterior trimmings of an automobile according to claim 5, wherein the front surface of the composite luminescent coating layer is provided with a transparent seal layer (5).

7. The electroluminescent paint for interior and exterior trim parts of an automobile according to claim 1, wherein the light-emitting area is rectangular and the peripheral edges thereof are located at a fixed distance from the periphery of the pattern desired to emit light.

8. The electroluminescent paint for interior and exterior trims of an automobile according to claim 1, wherein the electrode layer (1) is made of a transparent electrically conductive material, and the thickness of the electrode layer (1) is 0.03-0.1mm; the material of the luminescent layer (2) is electroluminescent material, and the thickness of the luminescent layer (2) is 0.03-0.1mm; the film thickness of the insulating layer (3) is 0.07-0.15mm; the conducting layer (4) is made of a metal material, and the thickness of the conducting layer (4) is 0.07-0.15mm.

9. A preparation method of electroluminescent paint for inner and outer ornaments of an automobile is characterized by comprising the following steps:

step S1: determining the size of a light emitting region (101) according to a pattern required to emit light on the back surface of the substrate (10), and manufacturing a coating layer of a conventional paint with a pattern; a positive and negative electrode boundary area is predetermined on the periphery of the light-emitting area (101), and the positive and negative electrode boundary area comprises a surrounding part (1021) which surrounds the light-emitting area in a form of a notch and two extension parts (1022) which are arranged at two ends of the notch and extend outwards to the edge of the base material (10) in parallel;

step S2: a first mask (103) for covering the two epitaxial portions (1022) and between the two epitaxial portions (1022) according to the positive and negative boundary regions;

and step S3: manufacturing the electrode layer (1) so that the manufacturing area of the electrode layer (1) is separated from the epitaxial portions (1022) by a coverage threshold value and all areas on the substrate (10) between the two epitaxial portions (1022) are removed;

and step S4: removing the first mask (103);

step S5: a second mask (104) for shielding all regions except the light-emitting region and all or part of the surrounding part (1021) is manufactured;

step S6: manufacturing the light-emitting layer (2) so that the manufacturing area of the light-emitting layer (2) is a light-emitting area and a whole or partial surrounding part (1021);

step S7: removing the second mask (104);

step S8: manufacturing the insulating layer (3) so that the manufacturing area of the insulating layer (3) is all the area of the whole base material (10);

step S9: manufacturing a positive and negative electrode boundary mask (102) according to the positive and negative electrode boundary area;

step S10: manufacturing the conducting layer (4) so that the manufacturing area of the conducting layer (4) is all areas on the base material (10) except the positive and negative electrode boundary areas;

step S11: removing the positive and negative electrode boundary mask (102);

step S12: two conductive areas of the conductive layer (4) spaced apart from each other are connected to the positive and negative poles of a power supply, respectively, to detect the effect of light emission electrically.

10. A preparation method of electroluminescent paint for inner and outer ornaments of an automobile is characterized by comprising the following steps:

step S1: determining the size of a light emitting region (101) on the front surface of the base material (10) according to a pattern required to emit light; a positive and negative electrode boundary area is predetermined on the periphery of the light-emitting area (101), and the positive and negative electrode boundary area comprises a surrounding part (1021) which surrounds the light-emitting area in a form of a notch and two extension parts (1022) which are arranged at two ends of the notch and extend outwards to the edge of the base material (10) in parallel;

step S2: manufacturing a positive and negative electrode boundary mask (102) according to the positive and negative electrode boundary area;

and step S3: manufacturing a conductive layer (4) so that the manufacturing area of the conductive layer (4) is all areas on the base material (10) except the positive and negative electrode boundary areas;

and step S4: removing the positive and negative boundary mask (102);

step S5: manufacturing the insulating layer (3) so that the manufacturing area of the insulating layer (3) is all the area of the whole base material (10);

step S6: a second mask (104) for shielding all regions except the light-emitting region and all or part of the surrounding part (1021) is manufactured;

step S7: manufacturing the light-emitting layer (2) so that the manufacturing area of the light-emitting layer (2) is a light-emitting area and a whole or partial surrounding part (1021);

step S8: removing the second mask (104);

step S9: manufacturing a first mask (103) for covering the two epitaxial portions (1022) and between the two epitaxial portions (1022);

step S10: manufacturing the electrode layer (1) so that the manufacturing area of the electrode layer (1) is separated from the epitaxial portions (1022) by a coverage threshold value and all areas on the substrate (10) between the two epitaxial portions (1022) are removed;

step S11: removing the first mask (103);

step S12: connecting two spaced conductive areas of the conductive layer (4) with the positive electrode and the negative electrode of a power supply respectively to electrify and detect the luminous effect;

step S13: and (5) preparing a coating of the conventional paint with patterns.