Optical film capable of preventing laminated film from cracking
By setting a thickened film tearing handle on the edge of the protective film of the optical film, dispersing the nail pressure, the crack problem caused by the nail pressure during the bonding process of the optical film is solved, significantly reducing the defective rate and improving the product Quality and competitiveness.
Patent Information
- Application Number
- CN202420353476.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-26
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-02-26
AI Technical Summary
During the bonding process of the optical film, the fingernail pressure is transmitted to the optical film body when the protective film is pre-teared, resulting in stress squeeze at the corner of the optical film and cracks. The prior art is difficult to effectively avoid this problem, resulting in The defect rate is high.
Design an optical film structure to prevent cracking of the bonding film, in which a tearing film handle is provided at the edge of the protective film, and a thickened layer is added to the handle, the thickness is increased to disperse the pressure, avoid local pressure of the optical film body, thereby reducing the occurrence of cracks .
By increasing the thickness of the tearing membrane handle, it effectively disperses the pressure of the fingernails, reduces the defect rate of the optical membrane, and improves the competitiveness of the product.
Smart Images
Figure CN222348935U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of packaging materials, and more specifically to an optical film for preventing laminating films from cracking. Background Art
[0002] Currently, most of the in-vehicle TPs are optical film-bonded OGS products. The incoming optical film consists of a protective film, an optical film body and a release film, and is coated with AG, AR or AF on the surface. Since the substrate of the optical film itself is relatively soft and fragile, before the optical film is bonded to the OGS glass, it is necessary to manually stick a tear handle to a corner of the protective film of the optical film, pre-tear the corner first and then tear off the entire surface of the protective film. When pre-tearing the protective film at the corner, bend it and tear it off with the thumb and fingernail. The protective film is relatively thin, and the pressure of the fingernail is transmitted to the optical film body through the protective film, causing the optical film body to be squeezed at the corner and produce cracks in the optical film. The defective rate in actual production is about 25%. Utility Model Content
[0003] The technical problem to be solved by the utility model is how to prevent the corners of the optical film body from being squeezed by force and thus causing cracks in the optical film when the protective film is torn off.
[0004] The technical problem to be solved by the utility model is achieved through the following technical solutions:
[0005] In order to solve the above technical problems, the utility model provides an optical film for preventing the cracking of the bonding film, which includes a release film, an optical film body and a protective film stacked in sequence from bottom to top, the protective film includes a substrate layer and an adhesive layer arranged under the substrate layer, a film tearing handle is provided at the edge of the substrate layer, the film tearing handle is integrally formed with the substrate layer, and a thickening layer is provided on the film tearing handle.
[0006] As a preferred embodiment of the optical film for preventing lamination film cracking provided by the utility model, the thickened layer extends to the entire substrate layer.
[0007] As a preferred embodiment of the optical film for preventing lamination film cracking provided by the utility model, the sum of the thicknesses of the adhesive layer, the substrate layer and the thickened layer is 90 μm.
[0008] As a preferred implementation of the optical film for preventing lamination film cracking provided by the utility model, the thickness of the adhesive layer is 15 μm.
[0009] As a preferred embodiment of the optical film for preventing laminating film cracking provided by the utility model, a "concave" shaped through hole is opened on the protective film, and the remaining material of the "concave" shaped through hole forms a film tearing handle.
[0010] As a preferred embodiment of the optical film for preventing lamination film cracking provided by the utility model, waste materials of the “concave” shaped through holes remain on the protective film.
[0011] As a preferred implementation of the optical film for preventing laminating film cracking provided by the utility model, a bonding area is provided on the waste material of the “concave” shaped through hole.
[0012] As a preferred implementation of the optical film for preventing the bonding film from cracking provided by the utility model, the “concave” shaped through hole is arranged at the edge of the protective film.
[0013] As a preferred implementation of the optical film for preventing lamination film cracking provided by the utility model, each corner of the “concave” shaped through hole is provided with a chamfer.
[0014] As a preferred implementation of the optical film for preventing lamination film cracking provided by the utility model, the radius of the chamfered corner is 1 mm.
[0015] The utility model has the following beneficial effects:
[0016] Since a thickened layer is provided on the film tearing handle, the thickness of the entire film tearing handle is increased. When the fingernail presses on the protective film, the pressure is better dispersed due to the increased thickness of the film tearing handle, thereby reducing the local pressure of the optical film body, thereby avoiding the problem of cracks in the optical film body, reducing the defective rate of the optical film, and improving the competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0018] Figure 1 The utility model is a schematic diagram of the structure of an optical film for preventing the bonding film from cracking.
[0019] Figure 2 for Figure 1 A magnified view of point A.
[0020] Figure 3 for Figure 2 Schematic diagram of the improved structure.
[0021] Figure 4 for Figure 3 Schematic diagram of the stacked structure.
[0022] Figure 5 This is a schematic diagram of the structure of Example 2.
[0023] Figure 6 for Figure 5 Top view of the .
[0024] Figure 7 for Figure 6 Schematic diagram of the improved structure.
[0025] Description of Figure Numbers:
[0026] Release film 1; optical film body 2; protective film 3; substrate layer 31; adhesive layer 32; film tearing handle 33; thickening layer 34;
[0027] A concave through hole 4; waste material 41; and a bonding area 42. DETAILED DESCRIPTION
[0028] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.
[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0030] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0031] The utility model provides an optical film for preventing bonding film cracking, which comprises a release film, an optical film body and a protective film which are sequentially stacked from bottom to top, the protective film comprising a substrate layer and a glue layer arranged below the substrate layer, a film tearing handle is arranged at the edge of the substrate layer, the film tearing handle is integrally formed with the substrate layer, and a thickening layer is arranged on the film tearing handle.
[0032] Since a thickened layer is provided on the film tearing handle, the thickness of the entire film tearing handle is increased. When the fingernail presses on the protective film, the pressure is better dispersed due to the increased thickness of the film tearing handle, thereby reducing the local pressure of the optical film body, thereby avoiding the problem of cracks in the optical film body, reducing the defective rate of the optical film, and improving the competitiveness of the product.
[0033] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention.
[0034] Example 1
[0035] See also Figures 1 to 4 , an optical film for preventing the laminating film from cracking provided by the utility model, comprising a release film 1, an optical film body 2 and a protective film 3 which are sequentially stacked from bottom to top, the protective film 3 comprising a substrate layer 31 and a glue layer 32 arranged below the substrate layer 31, a film tearing handle 33 is arranged at the edge of the substrate layer 31, the film tearing handle 33 is integrally formed with the substrate layer 31, and a thickening layer 34 is arranged on the film tearing handle 33. Since the thickening layer 34 is arranged on the film tearing handle 33, the thickness of the entire film tearing handle 33 is increased, and when the fingernail is pressed on the protective film 3, the pressure is better dispersed due to the increased thickness of the film tearing handle 33, thereby reducing the local pressure of the optical film body 2, thereby avoiding the problem of cracks in the optical film body 2, reducing the defective rate of the optical film, and improving the competitiveness of the product.
[0036] In this embodiment, the film tearing handle 33 extends outwards for a certain distance and is suspended in the air. After the thickening layer 34 is added to the film tearing handle 33 , the thickness is greater than the thickness of the protective film 3 .
[0037] Furthermore, the thickened layer 34 extends to the entire substrate layer 31 , and at this time, the thickness of the film tearing handle 33 is equal to the thickness of the substrate layer 31 .
[0038] Further, the sum of the thicknesses of the adhesive layer 32, the substrate layer 31 and the thickening layer 34 is 90 μm. More preferably, the thickness of the adhesive layer 32 is 15 μm, and the sum of the thicknesses of the substrate layer 31 and the thickening layer 34 is 75 μm.
[0039] Example 2
[0040] See also Figures 5 to 7 As a further optimization scheme of Example 1, in this embodiment, a "concave" shaped through hole 4 is opened on the protective film 3, and the residual material of the "concave" shaped through hole 4 forms a film tearing handle 33, so there is no need to add a film tearing handle 33 on the periphery of the protective film 3. Therefore, the film tearing handle 33 will not be unable to be placed due to the limitation of the peripheral space, avoiding the situation where tweezers need to be used to lift the film when the peripheral space is limited, thereby saving labor costs; and the material of the peripheral film tearing handle 33 can be omitted, which can greatly reduce the material cost.
[0041] Furthermore, the waste material 41 of the “concave”-shaped through hole 4 remains on the protective film 3. Before the protective film 3 is torn off, the waste material 41 is still connected to the protective film 3, which can effectively prevent dust or other particles from entering the product surface. Since the waste material 41 is still connected to the protective film 3, it is difficult to tear off the film tearing handle 33 at this time, so an adhesive area 42 can be set on the upper surface of the waste material 41, preferably glue, but not limited to this. When tearing off the upper protective film 3, the waste material 41 can be torn off with the help of glue first, and then the protective film 3 can be torn off with the film tearing handle 33.
[0042] Furthermore, the “concave”-shaped through hole 4 is arranged at the edge of the protective film 3 , so that the protective film 3 is easier to tear off, and the tearing handle 33 is not damaged due to high tearing difficulty.
[0043] Furthermore, each corner of the “concave”-shaped through hole 4 is provided with a rounded corner, so that the stress during film tearing is not concentrated at the corner, thereby avoiding the film tearing handle 33 from being torn due to stress concentration, and further improving the working efficiency.
[0044] Furthermore, the radius of the rounded corner is 1 mm.
[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0046] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.
Claims
1. An optical film for preventing lamination film cracking, characterized in that: It includes a release film, an optical film body and a protective film which are stacked in sequence from bottom to top. The protective film includes a substrate layer and an adhesive layer arranged under the substrate layer. A film tearing handle is arranged at the edge of the substrate layer. The film tearing handle is integrally formed with the substrate layer, and a thickening layer is arranged on the film tearing handle.
2. The optical film for preventing lamination film cracking according to claim 1, characterized in that: The thickened layer extends over the entire substrate layer.
3. The optical film for preventing lamination film cracking according to claim 2, characterized in that: The sum of the thicknesses of the adhesive layer, the base material layer and the thickening layer is 90 μm.
4. The optical film for preventing lamination film cracking according to claim 3, characterized in that: The thickness of the adhesive layer is 15 μm.
5. The optical film for preventing lamination film cracking according to claim 1, characterized in that: A "concave"-shaped through hole is provided on the protective film, and the remaining material of the "concave"-shaped through hole forms a film-tearing handle.
6. The optical film for preventing lamination film cracking according to claim 5, characterized in that: The waste material of the "concave"-shaped through hole remains on the protective film.
7. The optical film for preventing lamination film cracking according to claim 6, characterized in that: A bonding area is provided on the waste material of the "concave"-shaped through hole.
8. The optical film for preventing lamination film cracking according to claim 5, characterized in that: The "concave"-shaped through hole is arranged at the edge of the protective film.
9. The optical film for preventing lamination film cracking according to claim 5, characterized in that: Each corner of the "concave"-shaped through hole is provided with a rounded corner.
10. The optical film for preventing lamination film cracking according to claim 9, characterized in that: The radius of the rounded corner is 1 mm.