CN216946840U

CN216946840U - Decorative film

Info

Publication number: CN216946840U
Application number: CN202123300136.9U
Authority: CN
Inventors: 施庆锋; 陈菊; 陆金昇
Original assignee: 3M Speciality Materials Shanghai Co Ltd
Current assignee: 3M Speciality Materials Shanghai Co Ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-07-12
Anticipated expiration: 2031-12-24

Abstract

The utility model provides a decorative film which comprises a touch layer, a pattern layer and an adhesive layer which are sequentially stacked. The touch layer has a convex-concave touch, and the touch layer, the pattern layer and the first adhesive layer all have light transmittance not less than 90%. The surface of the decorative film provided by the utility model has convex-concave touch feeling, and the decorative film also has the pattern layer, so that the decorative film can simultaneously give double feelings of touch feeling and vision to a user.

Description

Decorative film

Technical Field

The utility model relates to a decorative film, in particular for panels with backlighting, for example in the field of automotive interior technology.

Background

With the increasing popularity of automobiles, people have not only basic functional requirements on automobiles, but also continuously improved requirements on the environment inside automobiles, and the aesthetic requirements on the interior trims of automobiles are continuously improved, for example, the center console of automobiles is required to be decorated with more aesthetic feeling and texture; for an automobile control panel, the design of a transparent cover plate is expected to be changed to obtain different visual effects. Although some skins covering the automobile panel have certain patterns, the current skins can be dull in visual fatigue after a long time in use. The control panel is conveniently watched through the traditional transparent cover plate design, but the color is single. The existing interior trim of the automobile lacks visual change effect and tactile experience, and can not meet the increasingly improved aesthetic requirements of people on the automobile trim.

Similarly, some panels in a room also need to be richer in color, and a varying visual effect is desired.

Therefore, there is a need to develop a decorative film, especially a decorative film suitable for use in automotive interior, which can provide aesthetic feeling without affecting the functional use, such as viewing a control panel.

SUMMERY OF THE UTILITY MODEL

One of the objectives of the present invention is to provide a decorative film, which is particularly suitable for being applied to a control panel or other panels of an automobile, and which can provide visual and tactile multi-sensory feelings without affecting the functional use of the corresponding components, and which is simple in manufacturing process.

Therefore, according to an aspect of the present invention, there is provided a decoration film including a touch-sensitive layer, a pattern layer and a glue layer which are sequentially stacked. The touch layer has a convex-concave touch, and the touch layer, the pattern layer and the first adhesive layer all have light transmittance not less than 90%.

Optionally, the decorative film further comprises a support layer disposed between the pattern layer and the first glue layer. Thus, the strength of the decorative film can be improved as a whole.

Alternatively, the tactile layer is a thermoplastic polyurethane layer or a thermoplastic polyolefin elastomer layer having a hardness ranging from shore a60 to a 80.

The utility model has the following beneficial effects: the surface of the decorative film provided by the utility model has convex-concave touch feeling, and the decorative film also has the pattern layer, so that the decorative film can simultaneously give double feelings of touch feeling and vision to a user. And because the design selects the film material with high light transmittance, the display panel has the light-transmitting display capability under the condition that the applied panel has backlight.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the following drawings merely illustrate some embodiments of the present invention, and that other drawings may be obtained by those skilled in the art without inventive efforts. Moreover, these drawings should not be construed as limiting the utility model in any way.

FIGS. 1 and 2 are schematic views of the structure of a decoration film according to an embodiment of the present invention;

FIGS. 3a and 3b are schematic views of the tactile layer of the decorative film;

fig. 4 is a schematic view of a pattern layer of the decoration film.

Detailed Description

It should be noted that the following embodiments are exemplary illustrations of the present invention, and features in different embodiments may be combined with each other without conflict. The utility model will be described in detail below with reference to specific embodiments with reference to the attached drawings.

As shown in fig. 1, an embodiment of the present invention provides a decoration film 100 including a touch sensing layer 110, a pattern layer 130, and a first adhesive layer 150, which are sequentially stacked. The touch layer 110, the pattern layer 130 and the first adhesive layer 150 respectively have a light transmittance of not less than 90%. The tactile layer 110 has a convex-concave tactile sensation. The decoration film 100 as a whole has a light transmittance of not less than 80%.

Preferably, the decorative film further comprises a support layer, and the support layer is arranged between the pattern layer and the adhesive layer, so that the strength of the decorative film can be improved integrally. Optionally, the decorative film further comprises a second adhesive layer disposed between the touch-sensitive layer and the pattern layer for better application of the touch-sensitive layer and the pattern layer together. Illustratively, as shown in fig. 2, another embodiment of the present invention provides a decoration film 200, which comprises a touch sensing layer 210, a second adhesive layer 220, a pattern layer 230, a support layer 240, and a first adhesive layer 250, which are sequentially stacked. The touch layer 210, the second adhesive layer 220, the pattern layer 230 and the first adhesive layer 250 respectively have a light transmittance of not less than 90%. The tactile layer 210 has a convex-concave tactile sensation. The decoration film 200 as a whole has a light transmittance of not less than 80%.

Preferably,

tactile layers

110, 210 are Thermoplastic Polyurethane (TPU) or Thermoplastic Polyolefin (TPO) elastomer layers having a hardness ranging from shore a60 to a 80. The inventor of the utility model finds that the touch layer is too thin, the touch is not obvious and the integral aging performance of the decorative film is influenced through a large amount of experiments; if the touch layer is too thick, the light transmittance is insufficient and the hardness of the whole decorative film may be lowered. Therefore, in view of the various properties of the decorative film, the thickness of the

touch layer

110, 210 is preferably between 100 and 200 μm.

The

touch layer

110, 210 may be formed by a direct printing or transfer printing process, for example, by melt-extruding TPU or TPO plastic pellets and forming a convex-concave touch on the surface using a direct patterned roll or a transfer patterned film. The specific pattern of the tactile layer is not limited as long as the tactile layer has a certain convex-concave tactile sensation, and as shown in fig. 3a and 3b, the tactile layer can be respectively a drawn wire, a grid, a triangular dot and the like. Alternatively, the touch layer is preferably made of a material that meets certain yellowing resistance requirements, such as the 4000 hour xenon lamp aged SAE2527J standard, to prevent yellowing over a certain service life. Alternatively, the tactile layer preferably meets a certain abrasion resistance, such as the Taber abrasion CS2500g, 1200 cycles.

In order to provide the decorative film with good light transmittance, the thickness of the

pattern layer

130, 230 is preferably not more than 5 μm. The

pattern layers

130 and 230 may be patterned by gravure printing or screen printing. Alternatively, the pattern layer may be patterned by gravure or screen printing on a PET or PP film. The pattern of the pattern layer can be designed and selected according to the needs, such as a wood grain pattern as shown in fig. 4, or other patterns such as a leather grain pattern or a monochrome effect pattern, or even a color pattern. In order to ensure the light transmission of the whole decorative film, the color of the pattern layer should not be dark so as to prevent the light transmission from being obstructed. The pattern layer is preferably formed by printing a pattern with a yellowing resistant ink, and the ink is preferably a Baolong ink or a Japanese DIC ink. In preparing the pattern layer, a support such as a PET film or a PP film may be selected, the ink may be applied by gravure printing or screen printing to form a pattern on the support to form the pattern layer, and the support may be removed after transferring the pattern layer to the touch layer. Or in a structure having the support layer 240, the pattern layer is formed directly on the support layer 240. Alternatively, during the printing process of the pattern layer, a very thin second adhesive layer, such as a thermosensitive adhesive layer, may be printed on the boundary or the boundary and other areas of the pattern layer; the patterned layer with the second adhesive layer is then applied to the tactile layer at an elevated temperature, and the tactile layer and the patterned layer are bonded together.

The touch layer mainly plays a role in optimizing the touch (or called hand feeling) of a user and generally has no function of displaying colors. The main function of the pattern layer is to give visual aesthetic feeling to the user, and the matched patterns are arranged based on different panel function requirements. For example, for a control panel of a car cab, since there are a plurality of driving parameters displayed under the control panel, a user (driver) needs to clearly view the driving parameters during driving the car, and therefore the pattern of the pattern layer is preferably simple and elegant so as not to affect the user's viewing of the display of the driving parameters under the control panel. For another example, for a decorative panel in a car or a room, the pattern of the pattern layer may be rich in color and graphics, and a fluorescent component may be added to the ink for making the pattern, so that a more beautiful pattern is presented under backlight. The touch layer and the pattern layer are combined, so that the decorative film provided by the utility model has dual sensory experience effects of touch and vision for a user, and the manufacturing process of the decorative film is simple.

Considering that the support layer 240 has a good effect of stretching and stretching the decorative film on the panel when the decorative film is applied, if it is too thick, it will affect the hardness of the whole decorative film, and the thickness of the support layer 240 is preferably not more than 20 μm. To ensure light transmittance of the entire decorative film, the support layer 240 is selected to have light transmittance of not less than 80%, preferably, not less than 90%. The support layer 240 is preferably made of a polyurethane material having a stretching rate of more than 200%.

Preferably, the first and

second glue layers

150 and 250 and 220 respectively have light transmittance of not less than 90%. The first adhesive layer 150 is preferably an acryl or urethane system adhesive layer having an adhesive property of more than 1.5N/mm. The second adhesive layer 220 may be an acrylic or polyurethane adhesive layer or a thermal adhesive layer. The thickness of the first glue layers 150, 250 is not more than 50 microns. The thickness of the second glue layer 220 is not more than 20 microns, preferably not more than 5 microns. The thickness of the second adhesive layer 220 is preferably as thin as possible on the basis of satisfying a certain viscosity, which may affect the overall hardness and touch effect. For example, the first

adhesive layers

150 and 250 and the second adhesive layer 220 may be selected from OCA8211 and OCA8271 of 3M company, and the like.

The decorative film provided by the utility model also has good light transmittance because the design selects the film material with high light transmittance. Under the condition that the applied panel has backlight, the liquid crystal display panel has light transmission display capability and can present the original pattern of the panel; under natural light, the convex-concave ornamentation of the touch layer and the pattern of the pattern layer are presented.

Optionally, the decorative film further comprises a release layer applied on the first adhesive layer to protect the first adhesive layer. When the decorative film is applied to the surface of the panel, the release layer is peeled off. The release layer can be PET release film or release film made of other materials, as long as the release layer can be matched with the first glue layer.

The decorative film provided by the utility model can be used for other aspects such as atmosphere illumination, function icon touch and the like besides being used for an automobile interior panel.

It will be understood that the embodiments described above are merely illustrative and not restrictive of the current invention, and that those skilled in the art will understand that modifications and variations may be made in the present invention without departing from the spirit and scope of the utility model. Such modifications and variations are considered to be within the purview and scope of the utility model and the appended claims. The scope of protection of the utility model is defined by the appended claims. Furthermore, any reference signs in the claims shall not be construed as limiting the scope of the utility model. Use of the verb "comprise" and its conjugations does not exclude the presence of elements or steps other than those stated in a claim. The indefinite article "a" or "an" preceding an element or step does not exclude the presence of a plurality of such elements or steps.

Claims

1. The decorative film is characterized by comprising a touch layer, a pattern layer and a first adhesive layer which are sequentially stacked, wherein the touch layer has a convex-concave touch, and the touch layer, the pattern layer and the first adhesive layer all have light transmittance not less than 90%.

2. The decorative film of claim 1, further comprising a support layer disposed between the pattern layer and the first glue layer.

3. The decorative film of claim 1 or 2, wherein the tactile layer is a thermoplastic polyurethane layer or a thermoplastic polyolefin elastomer layer having a hardness ranging from shore a60 to a 80.

4. The decorative film of claim 1 or 2, wherein the thickness of the touch layer is between 100 and 200 μm.

5. The decoration film of claim 2, wherein the support layer has a light transmittance of not less than 80% and a thickness of not more than 20 μm.

6. The decoration film of claim 1 or 2, wherein the first glue layer is an acrylic or polyurethane system glue layer having a viscosity of more than 1.5N/mm.

7. The decorative film of claim 1 or 2, wherein the thickness of the first glue layer is not more than 50 μm.

8. The decorative film according to claim 1 or 2, wherein the thickness of the pattern layer is not more than 5 μm.

9. The decoration film according to claim 1 or 2, wherein the pattern layer is formed with a pattern by gravure printing or screen printing.

10. The decorative film according to claim 1 or 2, wherein a second adhesive layer having a light transmittance of not less than 90% is provided between the touch layer and the pattern layer.

11. The decoration film according to claim 1 or 2, further comprising a support layer which is a polyurethane layer having a stretching rate of more than 200%.

12. The decoration film of claim 1 or 2, wherein the decoration film is configured to have a light transmittance of not less than 80%.