Multilayer light diffusion adhesive tape with uniform light diffusion efficiency

Abstract

The utility model discloses a light diffusion adhesive tape with multiple layers and uniform light diffusion efficiency. The light diffusion adhesive tape comprises a semi-transparent frosted coating, a PET (Polyethylene Terephthalate) base material layer, a light diffusion adhesive layer and a release film layer, the adhesive tape comprises a light diffusion semi-transparent frosted coating which is coated on a PET (Polyethylene Terephthalate) base material layer, and the surface of the PET base material layer is coated with a light diffusion adhesive layer; the light diffusion adhesive layer is arranged on one side, far away from the release film layer light diffusion semi-transparent frosted coating, of the PET base material layer; the release film layer is laminated on the surface of the light diffusion adhesive layer, and the release film layer is arranged on one side, far away from the PET base material layer, of the light diffusion adhesive layer. The light diffusion semi-transparent frosted coating and the light diffusion glue layer are connected with the PET base material layer in a coating mode and then are overlapped with the release film layer, so that the light diffusion effect, the light transmittance and the color adaptability are improved conveniently, and meanwhile the cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of preparation of optical adhesive tapes, and in particular relates to a light-expanding adhesive tape with multiple layers and uniform light diffusion efficiency. Background Art

[0002] Light diffusion tape can be used in industries such as LED lampshades, LCD backlight panels, and projection screens. This technology mainly uses light diffusion particles to scatter light on point light sources or line light sources to obtain a surface light source with uniform brightness. The main principle is that when light passes through the film, it is refracted multiple times by the resin and diffusion particles inside the film, thereby forming a uniform surface light source.

[0003] Traditional light diffusion technologies usually include: light diffusion coatings and light diffusion films. Light diffusion coating technology is to achieve the purpose of light diffusion by mixing light diffusion particles, pigments, polymer resins and other additives and then applying them to the surface. This method is simple and convenient to operate, but the light diffusion glue obtained has the following disadvantages: uneven light diffusion, insufficient adhesion of resin to light diffusion particles, and easy cracking of high-temperature coatings. In addition, this technology is only applicable to planes. When the coated surface structure is a curved surface, due to the fluidity of the coating, the thickness of the coating diffusion layer will be uneven, resulting in uneven light efficiency at each point on the surface. Light diffusion film is a technology that achieves light diffusion efficiency by melt extruding inorganic or silicone particles and resin particles into a film, and superimposing it with an adhesive layer on a specific substrate surface. Low adhesion between the film and the adhesive surface and low light diffusion efficiency are the current shortcomings. Traditional light diffusion technology usually has a single-structure light diffusion effect, which cannot achieve efficient light diffusion rate, and has the limitations of high cost, uneven appearance and cumbersome steps. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a light-expanding tape with multiple layers and uniform light diffusion efficiency, thereby effectively improving the light diffusion rate and reducing costs.

[0005] The purpose of the utility model is achieved through the following technical solutions: a light-diffusing tape with multiple layers and uniform light diffusion efficiency, the tape comprising a semi-transparent frosted coating, a PET substrate layer, a light-diffusing adhesive layer, and a release film layer; the tape comprises a light-diffusing semi-transparent frosted coating coated on the PET substrate layer, and the surface of the PET substrate layer is coated with the light-diffusing adhesive layer; the light-diffusing adhesive layer is arranged on a side of the PET substrate layer away from the light-diffusing semi-transparent frosted coating of the release film layer; the surface of the light-diffusing adhesive layer is overlapped with the release film layer, and the release film layer is arranged on a side away from the light-diffusing adhesive layer and away from the PET substrate layer.

[0006] Through the above scheme, the light-diffusing semi-transparent frosted coating and the light-diffusing adhesive layer designed in the utility model are connected to the PET substrate layer by coating, and then overlapped with the release film layer, so as to improve the light diffusion effect, light transmittance and color adaptability, while reducing costs.

[0007] Preferably, the light diffusion adhesive layer is composed of high-viscosity acrylic adhesive, light-diffusing microspheres, nano-titanium dioxide, a silane coupling agent, and an anti-settling agent.

[0008] Through the above solution, the addition of titanium dioxide in the light diffusion adhesive layer can not only ensure cost savings, but also achieve good light diffusion efficiency.

[0009] Preferably, the surface of the light diffusion adhesive layer is a grid micro-concave structure, and the grid micro-concave structure is uniform and has the same spacing.

[0010] Through the above scheme, the light diffusion adhesive layer is an acrylic adhesive layer, and the acrylic glue is coated on the grid release film, and then transferred to the PET base film. The grid micro-concave structure of the adhesive surface obtained by this method is uniform and has the same spacing, which can not only play the role of the same refractive index of the structure to the light source, but also ensure that the adhesive layer can be well adhered to the surface of the object. The uniform micro-concave structure on the surface allows uniform gaps between the adhesive layer and the surface of the object to be attached. The presence of the gaps combined with the light diffusion particles and titanium dioxide can show better light diffusion efficiency.

[0011] Preferably, the thickness of the light diffusion adhesive layer is 25-40 um.

[0012] Through the above solution, the thickness of the light diffusion adhesive layer is set to effectively ensure its light diffusion efficiency.

[0013] Preferably, the light-diffusing semi-transparent frosted coating is composed of a polymer resin, high-transmittance frosted particles, and a silane coupling agent.

[0014] Through the above scheme, the addition of silane coupling agent in the light-diffusing semi-transparent frosted coating can enhance the interaction force between the frosted particles, the resin, and the substrate layer.

[0015] Preferably, the light-diffusing semi-transparent frosted coating has a thickness of 10-25 um.

[0016] Through the above scheme, if the thickness of the light-diffusing semi-transparent frosted coating is too thick, it is easy to cause interface cracks between the functional coating and PET, and if the thickness is too thin, it will cause the light-diffusing frosted particles to fall off from the surface. A thickness of 10-25um can ensure that the light-diffusing semi-transparent frosted coating has better performance.

[0017] Preferably, the release film layer is a grid release film.

[0018] Through the above solution, the release film layer can be attached to the surface of the object to be attached to form a uniform gap, which plays an important role in the diffusion of light.

[0019] The beneficial effects of the utility model are:

[0020] The utility model provides a light-diffusing tape with multi-layer and uniform light diffusion efficiency. A light-diffusing semi-transparent frosted coating is coated on the surface of a PET substrate, a light-diffusing adhesive layer is coated on the back, and a release film is attached to the back, so that the light-diffusing tape has a three-layer light-diffusing effect, and has a better light-diffusing effect than traditional light-diffusing coatings and light-diffusing films.

[0021] The light diffusing semi-transparent frosted coating in the utility model is coated on the surface of the PET substrate layer. Compared with the conventional direct use of light diffusing film, the cost of the product is reduced, and other pigments can be added thereto, which has certain production controllability on the light diffusing effect, light transmittance and color adaptability.

[0022] The utility model uses a silane coupling agent in the light diffusion semi-transparent frosted coating and the light diffusion adhesive layer, which improves the adhesion of the coating and the adhesive layer to the substrate compared with the traditional coating primer layer, and saves time cost.

[0023] The release film layer adopted by the utility model is a grid release film, which has a uniform micro-concave structure and is attached to the surface of the attached object to produce uniform gaps, thus playing an important role in the diffusion of light.

[0024] The light diffusion tape prepared by the utility model can be used not only on a flat surface but also on a curved surface with a uniform curvature, and can ensure that the diffusion efficiency of the light source at each point on a macroscopic scale is consistent.

[0025] The light diffusion tape of the utility model is convenient and practical, and can be used by tearing off the release film and sticking it on the surface of the material, and the light diffusion adhesive layer has high adhesion to the surface of the substrate, ensuring that the light diffusion tape does not fall off on the surface for a long time.

[0026] In the light diffusion adhesive of the utility model, the nano titanium dioxide replaces a part of the light diffusion microspheres, thereby significantly reducing the cost while ensuring the light diffusion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the structure of the light diffusion tape;

[0028] Figure 2 A schematic diagram of the use of light diffusion tape attached to the surface of a substrate;

[0029] In the figure, 1-light diffusion semi-transparent frosted coating, 2-PET substrate layer, 3-light diffusion adhesive layer, 4-release film layer. DETAILED DESCRIPTION

[0030] The technical solution of the present utility model is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present utility model is not limited to the following. Example

[0031] like Figure 1-Figure 2 As shown, a light-diffusing tape with multi-layer and uniform light diffusion efficiency is characterized in that the tape comprises a light-diffusing semi-transparent frosted coating 1, a PET substrate layer 2, a light-diffusing adhesive layer 3, and a release film layer 4; the tape comprises a light-diffusing semi-transparent frosted coating 1 coated on the PET substrate layer 2, and the surface of the PET substrate layer 2 is coated with the light-diffusing adhesive layer 3; the light-diffusing adhesive layer 3 is arranged on the side of the PET substrate layer 2 away from the light-diffusing semi-transparent frosted coating 1 of the release film layer 4; the surface of the light-diffusing adhesive layer 3 is superimposed with the release film layer 4, and the release film layer 4 is arranged on the side away from the light-diffusing adhesive layer 3 and away from the PET substrate layer 2. The surface of the light-diffusing adhesive layer 3 is a grid micro-concave structure, and the grid micro-concave structure is uniform and has the same spacing. The thickness of the light-diffusing adhesive layer 3 is 25~40um. The thickness of the light-diffusing semi-transparent frosted coating 1 is 10-25um. The release film layer 4 is a grid release film. First, a light-diffusing semi-transparent matte coating 1 of uniform thickness is applied on the surface of the PET substrate layer 2 by scraping; then an acrylic light-diffusing layer is applied on the surface of the mesh release film and laminated to the non-coated surface of the PET. The acrylic adhesive layer is composed of acrylic high-viscosity adhesive, light-diffusing microspheres, nano-titanium dioxide, silane coupling agent, anti-settling agent, and anti-ultraviolet aging agent, and is applied to the surface of the lampshade to achieve a high light-diffusing effect. The acrylic adhesive layer is composed of pigment, acrylic high-viscosity adhesive, light-diffusing microspheres, nano-titanium dioxide, silane coupling agent, anti-settling agent, and anti-ultraviolet aging agent to obtain a light-diffusing film tape with high haze, and the resulting product is applied to the surface of the projection screen.

[0032] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A light-expanding tape with multiple layers and uniform light diffusion efficiency, characterized in that: The adhesive tape comprises a light-diffusing semi-transparent frosted coating (1), a PET substrate layer (2), a light-diffusing adhesive layer (3), and a release film layer (4); the adhesive tape comprises a light-diffusing semi-transparent frosted coating (1) coated on the PET substrate layer (2), and the surface of the PET substrate layer (2) is coated with the light-diffusing adhesive layer (3); the light-diffusing adhesive layer (3) is arranged on a side of the PET substrate layer (2) away from the light-diffusing semi-transparent frosted coating (1) of the release film layer (4); the surface of the light-diffusing adhesive layer (3) is overlapped with the release film layer (4), and the release film layer (4) is arranged on a side away from the light-diffusing adhesive layer (3) and away from the PET substrate layer (2).

2. The light-expanding tape with multiple layers and uniform light diffusion efficiency according to claim 1, characterized in that: The surface of the light diffusion adhesive layer (3) is a grid micro-concave structure, and the grid micro-concave structure is uniform and has the same spacing.

3. The light-expanding tape with multiple layers and uniform light diffusion efficiency according to claim 2, characterized in that: The thickness of the light diffusion adhesive layer (3) is 25-40 um.

4. The light-expanding tape with multiple layers and uniform light diffusion efficiency according to claim 1, characterized in that: The thickness of the light-diffusing semi-transparent frosted coating (1) is 10-25 um.

5. The light-expanding tape with multiple layers and uniform light diffusion efficiency according to claim 1, characterized in that: The release film layer (4) is a grid release film.

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