A light-induced changeable film sticking structure for a car and a light-induced changeable film

Abstract

The application relates to a light-induced color-changing film sticking structure for a car and a light-induced color-changing film, which comprises a common car film layer, a light-induced color-changing film layer and a transparent film layer, the sticking surface of the common car film layer is used for sticking and fixing with a car body, one side of the common car film layer away from the sticking surface is recessed with a sticking groove, the profile of the sticking groove is consistent with the light-induced color-changing film, the light-induced color-changing film layer is fixed in the sticking groove, the transparent film layer is stuck and fixed with one side of the common car film layer away from the sticking surface and the transparent film layer covers the light-induced color-changing film layer. The application has the effect of making the sticking of the light-induced color-changing film more firm.

Description

Technical Field

[0001] This application relates to the technical field of automotive parts, and in particular to a photochromic film bonding structure and a photochromic film for automotive applications. Background Technology

[0002] Photochromic films are commonly used as car body wraps. They change color after absorbing ultraviolet rays or sunlight, and return to their original color when the ultraviolet rays or sunlight are no longer present, depending on the indoor and outdoor temperatures.

[0003] Currently, in order to meet user needs, photochromic films are manufactured into preset shapes as required by users. These are then spliced ​​with ordinary car films that do not change color and pasted onto the car body. When the car body is not exposed to light, the photochromic film is the same color as the ordinary car film. However, when the car body is exposed to light, only the preset-shaped photochromic film changes color, thus creating a personalized car film.

[0004] When splicing photochromic film with ordinary car film, a notch area with the same preset shape as the photochromic film is usually pre-cut on the ordinary car film, and then the photochromic film is pasted on the notch area. However, the pasting area between the photochromic film and the ordinary car film is prone to peeling up due to water seepage, which can easily lead to the photochromic film not being firmly attached and falling off in a short time. Summary of the Invention

[0005] To make the photochromic film adhere more firmly, this application provides a photochromic film adhesion structure for automobiles and a photochromic film.

[0006] The above-mentioned objective of this application is achieved through the following technical solution:

[0007] An adhesive structure for a photochromic film used in automobiles includes a standard automotive film layer, a photochromic film layer, and a transparent film layer. The adhesive side of the standard automotive film layer is used for adhesive fixation to the vehicle body. An adhesive groove is recessed on the side of the standard automotive film layer facing away from the adhesive side. The outline of the adhesive groove is consistent with that of the photochromic film. The photochromic film layer is fixed in the adhesive groove. The transparent film layer is adhesively fixed to the side of the standard automotive film layer facing away from the adhesive side, and the transparent film layer covers the photochromic film layer.

[0008] By adopting the above technical solution, the graphic of the photochromic film required by the user is obtained, or after producing a batch of photochromic films with fixed shapes, a regular automotive film is stamped to form an adhesive groove consistent with the shape of the photochromic film. The photochromic film layer is then adhered into the adhesive groove, ensuring it does not protrude from the vehicle surface. Finally, a transparent film layer covers and fixes both the regular automotive film layer and the photochromic film layer. When the vehicle body is exposed to light, the light passes through the transparent film layer, causing the photochromic film layer in the adhesive groove to change color. When not exposed to light, the color of the photochromic film layer is the same as that of the regular automotive film layer. Therefore, because the photochromic film layer is covered by the transparent film layer, the adhesion between the photochromic film layer and the regular automotive film layer is not easily permeable, making the adhesion of the photochromic film more secure. Furthermore, even if water seeps into the adhesive groove through the transparent film layer, only the photochromic film layer is partially permeated and replaced, while the regular automotive film layer remains intact.

[0009] Optionally, when the photochromic film layer is fixed in the adhesive groove, the end of the photochromic film layer away from the bottom of the adhesive groove is flush with the opening of the adhesive groove.

[0010] By adopting the above technical solution, the side of the photochromic film layer away from the adhesive groove is flush with the opening of the adhesive groove, so that the photochromic film completely fills the adhesive groove, improving the smoothness of the surface of the car body after the film is applied.

[0011] Optionally, a sealant is applied between the edge of the photochromic film layer and the sidewall of the adhesive groove.

[0012] By adopting the above technical solution, before the transparent film layer is pasted and fixed on the surface of the ordinary car film layer, the sealant is applied to cover the gap between the photochromic film layer and the side wall of the pasting groove. At the same time, if water penetrates into the transparent film layer and reaches the pasting groove, the sealant will prevent the water from easily seeping in from the edge of the photochromic film layer, and the adhesion of the photochromic film layer will be more firm.

[0013] Optionally, it also includes a detachable limiting block, which is strip-shaped and flexible, and is fixed to the edge of the photochromic film layer and the ordinary automotive film layer, and the limiting block is covered with sealant.

[0014] By adopting the above technical solution, after the sealant is applied, in order to prevent excess sealant from overflowing and flowing into the photochromic film layer or ordinary car film layer, thus preventing the transparent car film layer from being completely adhered when fixed, a flexible limiting block is set to cover the sealant. This can prevent excess sealant from seeping out. At the same time, the flexible limiting block can cover all the edges of the photochromic film through deformation, making it more convenient to use.

[0015] Optionally, the limiting block has a strip-shaped limiting groove along its own extending direction. The inner wall of the limiting groove is coated with an anti-adhesive layer. The side of the limiting block with the limiting groove is coated with a limiting adhesive layer. The limiting adhesive layer is located on both sides of the limiting groove along its own extending direction. When the limiting block is fixed to the edge of the photochromic film layer and the ordinary automotive film layer, the limiting adhesive layer is fixed to the photochromic film layer and the ordinary automotive film layer. The portion of the sealant protruding between the edge of the photochromic film layer and the side wall of the adhesive groove is located inside the limiting groove.

[0016] By adopting the above technical solution, a non-stick layer is formed by opening a strip-shaped limiting groove and coating the inner wall of the limiting groove with an anti-stick material. The limiting adhesive layers on both sides are tightly bonded to the ordinary car film layer and the photochromic film layer. The overflowing sealant is sealed in the limiting groove. The setting of the limiting groove makes it difficult for the sealant to be squeezed out to the edge of the ordinary car film layer and the photochromic film layer. The non-stick layer can place the sealant on the limiting block for bonding. After the sealant solidifies, the excess sealant in the limiting groove is cut off, so that the coating effect of the sealant does not easily affect the subsequent bonding of the transparent film layer.

[0017] Optionally, a filler film layer is also included. The filler film layer is made of a transparent material. When the photochromic film layer is fixed in the adhesive groove, the end of the photochromic film layer away from the bottom of the adhesive groove has a filling space with the groove opening. The filler film layer is fixed in the filling space, and the side of the filler film layer away from the photochromic film layer is flush with the groove opening.

[0018] By adopting the above technical solution, after the photochromic film layer is pasted into the adhesive groove, there is a filling space left to fill another layer of transparent filler film. The filler film is made of transparent material and its color can be changed. After filling, due to the effect of light being absorbed by the filler film again, the light received by the photochromic film layer becomes weaker, thereby making the color change of the photochromic film layer lighter. This satisfies the user's needs for choosing the depth of color change after the photochromic film is applied, or a transparent filler film with a color different from that of ordinary car film can be selected. Thus, the photochromic film layer can still be distinguished from ordinary car film layer when it is not exposed to light, while also having the function of changing color under light, providing users with more choices.

[0019] Optionally, when the transparent film layer is bonded and fixed to the side of the ordinary car film layer facing away from the adhesive surface, the portion of the transparent film layer located in the adhesive groove is recessed towards the bottom of the adhesive groove, and the transparent film layer is bonded and fixed to the photochromic film layer. An adhesive area is left between the transparent film layer and the groove opening of the adhesive groove. The adhesive area is used to bond a light-transmitting film layer made of transparent material with the same shape as the photochromic film layer.

[0020] By adopting the above technical solution, the light-transmitting film layer can be a film with a different color from ordinary car film layers, and the light-transmitting film layer is pasted on the surface of the outermost transparent film layer, which makes it easy for users to replace the light-transmitting film layer by themselves. This allows the photochromic film layer to display different colors before and after receiving light, improving the convenience of user operation.

[0021] The second objective of this invention is achieved through the following technical solution:

[0022] A photochromic film, using an automotive photochromic film bonding structure.

[0023] By adopting the above technical solution, the graphic of the photochromic film required by the user is obtained, or after producing a batch of photochromic films with fixed shapes, a regular automotive film is stamped to form an adhesive groove consistent with the shape of the photochromic film. The photochromic film layer is then adhered into the adhesive groove, ensuring it does not protrude from the vehicle surface. Finally, a transparent film layer covers and fixes both the regular automotive film layer and the photochromic film layer. When the vehicle body receives light, the light passes through the transparent film layer, causing the photochromic film layer in the adhesive groove to change color. When not exposed to light, the color of the photochromic film layer is the same as that of the regular automotive film layer. Therefore, because the photochromic film layer is covered by the transparent film layer, the bonding area between the photochromic film layer and the regular automotive film layer is not easily permeable, making the adhesion of the photochromic film more secure. Furthermore, even if water seeps into the adhesive groove through the transparent film layer, only the photochromic film layer is partially permeated and replaced, while the regular automotive film layer remains intact.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. By stamping ordinary car film into an adhesive groove that matches the shape of photochromic film, and then pasting the photochromic film layer into the adhesive groove, the photochromic film layer will not protrude from the car body surface. The photochromic film layer is covered by a transparent film layer, and the bonding area between the photochromic film layer and the ordinary car film layer is not easy to seep water, making the adhesion of the photochromic film more secure.

[0026] 2. The photochromic film layer is positioned so that the side away from the adhesive groove is flush with the opening of the adhesive groove, which allows the photochromic film to completely fill the adhesive groove and improves the smoothness of the car body surface after the film is applied.

[0027] 3. After the sealant is applied, in order to prevent excess sealant from overflowing and flowing into the photochromic film layer or the ordinary car film layer, which would prevent the transparent car film layer from being completely adhered when it is fixed, a flexible limiting block is set to cover the sealant. This can prevent excess sealant from seeping out. At the same time, the flexible limiting block can cover all the edges of the photochromic film through deformation, which is more convenient to use.

[0028] 4. The light-transmitting film layer can be a different color from the ordinary car film layer, and the light-transmitting film layer is pasted on the surface of the outermost transparent film layer, which makes it easy for users to replace the light-transmitting film layer by themselves. This allows the photochromic film layer to display different colors before and after receiving light, improving the convenience of user operation. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0030] Figure 2 This is a cross-sectional schematic diagram of Embodiment 1 of this application;

[0031] Figure 3 This is a schematic diagram of the fixed state of the limiting block in Embodiment 1 of this application;

[0032] Figure 4 This is a partial structural diagram of the limiting block in Embodiment 1 of this application;

[0033] Figure 5 This is a schematic diagram of the overall structure of the limiting block in Embodiment 1 of this application;

[0034] Figure 6 This is a cross-sectional schematic diagram of Embodiment 2 of this application;

[0035] Figure 7 This is a cross-sectional schematic diagram of one embodiment 3 of this application.

[0036] Explanation of reference numerals in the attached drawings: 1. Photochromic film layer; 2. Ordinary automotive film layer; 3. Transparent film layer; 4. Adhesive groove; 5. Limiting block; 51. Limiting groove; 52. Limiting adhesive layer; 53. Injection hole; 6. Sealant; 7. Filler film layer; 8. Translucent film layer. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0038] Example 1

[0039] like Figure 1 and Figure 2 As shown, this application discloses a photochromic film bonding structure for automobiles, specifically including a regular car film layer 2, a photochromic film layer 1, and a transparent film layer 3. The regular car film layer 2 includes an adhesive surface for bonding with the car body, and the adhesive surface is coated with adhesive. The side of the regular car film layer 2 facing away from the adhesive surface is used to bond and fix the photochromic film layer 1. The transparent film layer 3 covers the surfaces of both the regular car film layer 2 and the photochromic film layer 1, and the transparent film layer 3 is fixedly bonded to both the regular car film layer 2 and the photochromic film layer 1.

[0040] Reference Figure 2 and Figure 3 On the side of the ordinary car film layer 2 facing away from the adhesive surface, there is an adhesive groove 4 recessed at a pre-selected position. The adhesive groove 4 is molded and stamped according to the shape required by the user. In this embodiment, the shape of the adhesive groove 4 is rectangular. The side of the photochromic film layer 1 used for adhesive is bonded to the bottom of the adhesive groove 4, and the side of the photochromic film layer 1 used for receiving light is bonded to the transparent film layer 3. When the photochromic film layer 1 is bonded to the adhesive groove 4, the end face of the photochromic film layer 1 away from the bottom of the adhesive groove 4 is bonded to the adhesive groove 4. The grooves are flush to ensure a smooth surface after the transparent film layer 3 covers the photochromic film layer 1 and the ordinary car film layer 2. After the photochromic film layer 1 is pasted into the adhesive groove 4, a gap is left between the photochromic film layer 1 and the inner wall of the adhesive groove 4. The edge of the photochromic film layer 1 and the side wall of the adhesive groove 4 are coated with sealant 6 to fill the gap. The color of the sealant 6 is the same as that of the ordinary car film layer 2, usually white or black. If other colors are used, they are adjusted by adding pigment.

[0041] Reference Figure 3 and Figure 4 The edge of the photochromic film layer 1 and the surface edge of the adhesive groove 4 are detachably fixed with a limiting block 5. The limiting block 5 is a rectangular strip and is flexible. The limiting block 5 has a rectangular strip-shaped limiting groove 51 along its own extension direction. The limiting groove 51 extends to the ends of both ends of the limiting block 5. The limiting groove 51 is coated with an anti-adhesive layer. The anti-adhesive layer includes, but is not limited to, color additives, auxiliaries, nanomaterials, solvents and modified resins.

[0042] The limiting block 5 has a limiting groove 51 on one side coated with a limiting adhesive layer 52. The limiting adhesive layer 52 is located on both sides of the limiting groove 51 along its own extension direction. The limiting adhesive layer 52 extends to both ends of the limiting block 5. The limiting block 5 is fixed to the edge of the photochromic film layer 1 and the ordinary car film layer 2. The limiting block 5 is covered with sealant 6, and the portion of the sealant 6 protruding between the edge of the photochromic film layer 1 and the side wall of the adhesive groove 4 is located in the limiting groove 51.

[0043] Reference Figure 3 and Figure 5 The limiting block 5 has a plurality of injection holes 53 on the side facing away from the recessed limiting groove 51. The plurality of injection holes 53 are evenly distributed along the extension direction of the limiting block 5. The injection holes 53 are connected to the limiting groove 51. The injection holes 53 are used for the staff to apply the sealant 6 into the limiting groove 51. The sealant 6 in the limiting groove 51 penetrates into the gap between the photochromic film layer 1 and the inner sidewall of the adhesive groove 4 to prevent the sealant 6 from overflowing into the ordinary car film layer 2 during the application.

[0044] The length of the limiting block 5 is sufficient to be fixed end-to-end along the entire outline of the adhesive groove 4. The length of the limiting block 5 can be cut according to the actual length of the limiting groove 51.

[0045] The implementation principle of Example 1 is as follows: When producing the automotive photochromic film bonding structure, firstly, a mold is used to press the side of the ordinary car film layer 2 facing away from the bonding surface to create a recessed adhesive groove 4 with the customer's requirements or a preset shape. Then, the same mold is used to cut the photochromic film layer 1 to match the shape of the adhesive groove 4. The photochromic film layer 1 is then pasted into the adhesive groove 4. A limiting block 5, which is sufficient to cover the edge length of the adhesive groove 4, is pasted onto the photochromic film layer 1 and the ordinary car film layer 2. The limiting block 5 covers the gap between the edge of the photochromic film layer 1 and the side wall of the adhesive groove 4. The sealant 6 is injected into the limiting groove 51 through several injection holes 53. The sealant 6 penetrates into the gap between the edge of the photochromic film layer 1 and the side wall of the adhesive groove 4.

[0046] After the sealant 6 is injected, the sealant 6 protruding from the edge surface of the photochromic film layer 1 is cut off with a utility knife. Finally, the transparent film layer 3 is bonded to the surface of the ordinary car film layer 2 and the photochromic film layer 1 so that the transparent film layer 3 covers the entire ordinary car film and the photochromic film.

[0047] Example 2

[0048] The difference between Example 2 and Example 1 is that: (Refer to...) Figure 6 The photochromic film adhesive structure for automobiles also includes a filler film layer 7. The filler film layer 7 is made of a transparent material and its shape is consistent with the shape of the adhesive groove 4. The color of the filler film layer 7 can be changed. When the photochromic film layer 1 is fixed in the adhesive groove 4, the end of the photochromic film layer 1 away from the bottom of the adhesive groove 4 leaves a filling space with the groove opening of the adhesive groove 4. The filler film layer 7 is fixed in the filling space, and the side of the filler film layer 7 away from the photochromic film layer 1 is flush with the groove opening of the adhesive groove 4.

[0049] The limiting groove 51 of the limiting block 5 covers the side wall of the adhesive groove 4 and the edge of the filling film layer 7 and the photochromic film layer 1, and the sealant 6 penetrates into the gap between the edge of the photochromic film layer 1 and the filling film layer 7 and the side wall of the adhesive groove 4.

[0050] The implementation principle of Example 2 is as follows: A transparent filler film can be added to the remaining space. After filling, due to the absorption of light by the filler film, the light received by the photochromic film layer 1 becomes weaker, thus making the color change of the photochromic film layer 1 lighter. This satisfies the user's need for choosing the depth of color change after the photochromic film is applied, or a transparent filler film with a different color from the ordinary car film layer 2 can be selected. This allows the photochromic film layer 1 to still have a color difference from the ordinary car film layer 2 when not exposed to light, while also having the function of changing color under light, providing users with more choices.

[0051] Example 3

[0052] The difference between Example 3 and Example 1 is that: (Refer to...) Figure 7 When the transparent film layer 3 is bonded and fixed to the side of the ordinary car film layer 2 facing away from the adhesive surface, the part of the transparent film layer 3 located in the adhesive groove 4 is recessed towards the bottom of the adhesive groove 4, and the transparent film layer 3 is bonded and fixed to the photochromic film layer 1. An adhesive area is left between the transparent film layer 3 and the groove of the adhesive groove 4. The adhesive area is used to bond the light-transmitting film layer 8 made of transparent material and with the same shape as the photochromic film layer 1.

[0053] The limiting groove 51 of the limiting block 5 is fixed between the edge of the light-transmitting film layer 8 and the transparent vehicle film layer, and the limiting groove 51 covers the gap between the edge of the light-transmitting film layer 8 and the transparent vehicle film layer.

[0054] The implementation principle of Example 3 is as follows: the light-transmitting film layer 8 can be a film with a different color from the ordinary car film layer 2, and the light-transmitting film layer 8 is pasted on the surface of the outermost transparent film layer 3, so that the user can replace the light-transmitting film layer 8 by himself. This allows the photochromic film layer 1 to display different colors before and after receiving light, which improves the convenience of user operation compared to the filler film layer 7.

[0055] The application also provides a photochromic film, which is applied using a photochromic film bonding structure for automobiles.

[0056] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A photochromic film bonding structure for automobiles, characterized in that, The film includes a regular car film layer (2), a photochromic film layer (1), and a transparent film layer (3). The adhesive side of the regular car film layer (2) is used to be adhered and fixed to the car body. The side of the regular car film layer (2) facing away from the adhesive side has an adhesive groove (4). The outline of the adhesive groove (4) is consistent with the photochromic film. The photochromic film layer (1) is fixed in the adhesive groove (4). The transparent film layer (3) is adhered and fixed to the side of the regular car film layer (2) facing away from the adhesive side, and the transparent film layer (3) covers the photochromic film layer (1). When the photochromic film layer (1) is fixed in the adhesive groove (4), the end of the photochromic film layer (1) away from the bottom of the adhesive groove (4) is flush with the opening of the adhesive groove (4).

2. The photochromic film bonding structure for automobiles according to claim 1, characterized in that: The edge of the photochromic film layer (1) and the sidewall of the adhesive groove (4) are coated with sealant (6).

3. The photochromic film bonding structure for automobiles according to claim 2, characterized in that: It also includes a detachable limiting block (5), which is strip-shaped and flexible. The limiting block (5) is fixed to the edge of the photochromic film layer (1) and the ordinary car film layer (2). The limiting block (5) is covered with sealant (6).

4. The photochromic film bonding structure for automobiles according to claim 3, characterized in that: The limiting block (5) has a strip-shaped limiting groove (51) along its own extension direction. The inner wall of the limiting groove (51) is coated with an anti-adhesive layer. The side of the limiting block (5) with the limiting groove (51) is coated with a limiting adhesive layer (52). The limiting adhesive layer (52) is located on both sides of the limiting groove (51) along its own extension direction. When the limiting block (5) is fixed to the edge of the photochromic film layer (1) and the ordinary car film layer (2), the limiting adhesive layer (52) is fixed to the photochromic film layer (1) and the ordinary car film layer (2). The portion of the sealant (6) protruding between the edge of the photochromic film layer (1) and the side wall of the adhesive groove (4) is located in the limiting groove (51).

5. The photochromic film bonding structure for automobiles according to claim 1, characterized in that: It also includes a filling film layer (7), which is made of transparent material. When the photochromic film layer (1) is fixed in the adhesive groove (4), the end of the photochromic film layer (1) away from the bottom of the adhesive groove (4) leaves a filling space with the groove opening of the adhesive groove (4). The filling film layer (7) is fixed in the filling space, and the side of the filling film layer (7) away from the photochromic film layer (1) is flush with the groove opening of the adhesive groove (4).

6. The photochromic film bonding structure for automobiles according to claim 1, characterized in that: When the transparent film layer (3) is bonded and fixed to the side of the ordinary car film layer (2) facing away from the adhesive surface, the part of the transparent film layer (3) located in the adhesive groove (4) is recessed towards the bottom of the adhesive groove (4), and the transparent film layer (3) is bonded and fixed to the photochromic film layer (1). There is an adhesive area between the transparent film layer (3) and the groove of the adhesive groove (4). The adhesive area is used to bond a light-transmitting film layer (8) made of transparent material and with the same shape as the photochromic film layer (1).

7. A photochromic film for automobiles, characterized in that, The application uses a photochromic film bonding structure for automobiles as described in any one of claims 1 to 6.

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