Optical film structure

Abstract

The embodiment of the utility model belongs to the technical field of optical films. The utility model also relates to an optical film structure, which comprises an optical film main body, the optical film main body comprises an optical film part and an adhesive layer arranged on the optical film part, one side, far away from the adhesive layer, of the optical film part is provided with a leveling assembly, and the leveling assembly comprises a PET film OCA adhesive layer connected with the optical film part. One side, far away from the optical film part, of the PET film OCA adhesive layer is connected with a PET film layer, and the PET film layer is used for flattening the optical film part so as to flatten the optical film main body. According to the optical film, the leveling assembly is arranged, the leveling assembly comprises the PET film OCA glue layer connected with the optical film part, the PET film OCA glue layer is connected with the PET film layer, and after the PET film layer and the optical film part are connected together through the PET film OCA glue layer, the PET film layer can flatten the optical film part so as to flatten the optical film main body; the optical film main body is leveled in advance, so that the bending condition of the optical film main body is reduced, and the problems of bubbles, deviation and the like after film pasting can be remarkably reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of optical films, and more specifically, to an optical film structure. Background Art

[0002] In the automotive display industry, the application of optical films is a key factor in ensuring the visual quality and performance of the display. Among them, optical films such as AG film and AR film are widely used to improve the anti-glare, anti-reflection and other properties of the display. During the production process, these optical films need to be precisely attached to the cover surface.

[0003] In the traditional film laminating process, the optical film is vacuum-absorbed on the platen and then rolled and attached by the machine roller. However, this process has a significant problem: when the optical film itself is severely warped or deformed, it cannot be completely flattened by the platen, which will cause bubbles, deviations, or even failure to attach after laminating, which greatly reduces production efficiency and increases production costs. In severe cases, the entire batch of optical films may even need to be scrapped. Therefore, we have improved this and proposed an optical film structure.

[0004] For example, a Chinese patent (Announcement No. CN206946011U) discloses a device for controlling the warping of an optical film, and its specification discloses that optical films are widely used in the display industry because of their excellent optical properties. During the production process of optical films, due to the accompanying coating, tension control, drying, and some other process treatments, internal stress imbalance will occur, causing the optical film to be uneven when placed on a plane, that is, warping. The warping scrap rate of optical films is very high, and warping usually occurs in batches, which seriously increases the production costs of the company. The above patents can prove the defects of the existing technology. Utility Model Content

[0005] The technical problem to be solved by the embodiments of the utility model is that when the optical film itself is severely warped or deformed, it cannot be completely sucked flat by the platen, which will lead to problems such as bubbles, deviation or even failure to attach the film after it is attached.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] An optical film structure comprises: an optical film body, wherein the optical film body comprises an optical film portion and an adhesive layer arranged on the optical film portion, a leveling component is arranged on a side of the optical film portion away from the adhesive layer, the leveling component comprises a PET film (OCA) adhesive layer connected to the optical film portion, a side of the PET film (OCA) adhesive layer away from the optical film portion is connected to a PET film layer, and the PET film layer is used to flatten the optical film portion to achieve flatness of the optical film body.

[0008] As an improved manner of the utility model, the outer dimensions of the flattening component are larger than the outer dimensions of the optical film body.

[0009] As an improvement of the present invention, the thickness and hardness of the flattening component are greater than the thickness and hardness of the optical film body.

[0010] As an improved approach of the present invention, the thickness of the flattening component is 0.3 mm, and the thickness of the optical film body is less than 0.1 mm.

[0011] As an improved manner of the utility model, the adhesive layer is an optical film OCA adhesive layer, and the optical film OCA adhesive layer is connected to a side of the optical film portion away from the PET film OCA adhesive layer.

[0012] As an improved manner of the utility model, a side of the optical film OCA adhesive layer away from the optical film portion is connected with an optical film second release film, and the optical film second release film is used for protecting the optical film OCA adhesive layer.

[0013] As an improved manner of the present invention, the optical film portion includes an optical film substrate connected to a surface of the optical film OCA adhesive layer away from the second release film of the optical film.

[0014] As an improved manner of the present invention, the side of the optical film substrate away from the optical film OCA adhesive layer is connected with an optical film functional layer.

[0015] As an improvement of the present invention, the side of the optical film functional layer away from the optical film substrate is connected with an optical film first release film, and the optical film first release film is bonded to the side of the PET film OCA adhesive layer away from the PET film layer.

[0016] As an improved method of the utility model, the viscosity of the PET film OCA adhesive layer is less than the viscosity of the optical film OCA adhesive layer.

[0017] Compared with the prior art, the embodiments of the present invention mainly have the following beneficial effects:

[0018] In order to solve the problem in the prior art that when the optical film itself is severely warped or deformed, it cannot be completely flattened by the table, which will lead to bubbles, deviation or even inability to attach after the film is pasted, the present application provides a flattening component, the flattening component includes a PET film OCA adhesive layer connected to the optical film part, the PET film OCA adhesive layer is connected to the PET film layer, after the PET film layer and the optical film part are connected together by the PET film OCA adhesive layer, the PET film layer can flatten the optical film part to achieve the flatness of the optical film body; that is, the present application can significantly reduce the bubbles, deviation and other problems that appear after the film is pasted by pre-flattening the optical film body and reducing the bending of the optical film body, thereby improving the film pasting quality and product qualification rate; reducing the scrap rate of optical film due to poor film pasting, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of the optical film provided in this application;

[0020] Figure 2 A schematic structural diagram of an optical film body of the optical film structure provided in the present application;

[0021] Figure 3 A schematic structural diagram of the flattening component of the optical film structure provided in this application.

[0022] Indicated in the figure:

[0023] 1. Optical film body; 101. Optical film first release film; 102. Optical film functional layer; 103. Optical film substrate; 104. Optical film OCA adhesive layer; 105. Optical film second release film;

[0024] 2. Flattening components; 201. PET film layer; 202. PET film OCA adhesive layer. DETAILED DESCRIPTION

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present invention belongs; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. Reference to "embodiments" herein means that specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] As described in the background technology, in the traditional film laminating process, the optical film is adsorbed on the table by vacuum and then rolled and attached by the machine roller. However, this process has a significant problem: when the optical film itself is severely warped or deformed, it cannot be completely flattened by the table, which will cause bubbles, misalignment and even inability to attach after the film is laminating, thereby greatly reducing production efficiency and increasing production costs. In severe cases, the entire batch of optical films may even need to be scrapped.

[0027] In order to solve this technical problem, the utility model provides an optical film structure.

[0028] Specifically, please refer to Figure 1-Figure 3 , the optical film structure specifically includes:

[0029] An optical film body 1 comprises an optical film portion and an adhesive layer arranged on the optical film portion, a flattening component 2 is arranged on a side of the optical film portion away from the adhesive layer, the flattening component 2 comprises a PET film OCA adhesive layer 202 connected to the optical film portion, a side of the PET film OCA adhesive layer 202 away from the optical film portion is connected to a PET film layer 201, and the PET film layer 201 is used for flattening the optical film portion to achieve the flatness of the optical film body 1.

[0030] The optical film structure provided by the utility model has a flattening component 2, and the flattening component 2 includes a PET film OCA adhesive layer 202 connected to the optical film part, and the PET film OCA adhesive layer 202 is connected to a PET film layer 201. After the PET film layer 201 and the optical film part are connected together by the PET film OCA adhesive layer 202, the PET film layer 201 can flatten the optical film part to achieve the flatness of the optical film body 1; that is, the present application can significantly reduce the problems of bubbles, deviation, etc. after film pasting by pre-flattening the optical film body 1 to reduce the bending of the optical film body 1, thereby improving the film pasting quality and product qualification rate; reducing the scrap rate of optical film due to poor film pasting, thereby reducing production costs.

[0031] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] Embodiment 1 of the optical film structure of the utility model

[0035] Please refer to Figure 1-Figure 3 The optical film structure of the utility model comprises: an optical film body 1, wherein the optical film body 1 comprises an optical film portion and an adhesive layer arranged on the optical film portion, a flattening component 2 is arranged on the side of the optical film portion away from the adhesive layer, the flattening component 2 comprises a PET film OCA adhesive layer 202 connected to the optical film portion, a PET film layer 201 is connected to the side of the PET film OCA adhesive layer 202 away from the optical film portion, and the PET film layer 201 is used to flatten the optical film portion to achieve the flatness of the optical film body 1, that is, the application flattens the optical film body 1 in advance to reduce the bending of the optical film body 1, thereby avoiding poor film pasting or failure to fit the film, and can significantly reduce problems such as bubbles and deviation after film pasting, thereby improving the film pasting quality and product qualification rate; reducing the scrap rate of optical film caused by poor film pasting, thereby reducing production costs.

[0036] Further, such as Figure 1 As shown, the outer dimensions of the flattening component 2 are larger than those of the optical film body 1 , so that the flattening component 2 can be easily separated from the optical film body 1 after the optical film body 1 is attached to the product.

[0037] Furthermore, the thickness and hardness of the leveling component 2 are greater than the thickness and hardness of the optical film body 1 , so the optical film body 1 can be leveled by the leveling component 2 , so that the optical film body 1 remains flat.

[0038] Furthermore, the thickness of the flattening component 2 is 0.3MM, and the thickness of the optical film body 1 is less than 0.1mm. Since the thickness of the flattening component 2 is greater than the thickness of the optical film body 1, the flattening component 2 can flatten the optical film after bonding. During bonding, the optical film body 1 only needs to be within the shape of the flattening component 2, and a small amount of small bubbles are allowed between the flattening component 2 and the optical film body 1.

[0039] Further, such as Figure 1-Figure 2 As shown, the adhesive layer is an optical film OCA adhesive layer 104, and the optical film OCA adhesive layer 104 is connected to the side of the optical film part away from the PET film OCA adhesive layer 202. OCA adhesive is a special adhesive used for bonding transparent optical elements. It is a pressure-sensitive adhesive. It has the characteristics of colorless transparency, high light transmittance (total light transmittance is usually greater than 90%, and some products even exceed 99%), and good bonding strength. OCA optical adhesive can be cured at room temperature or medium temperature, and has small curing shrinkage. Long-term use will not cause yellowing, peeling and deterioration. The application of OCA optical adhesive is very wide.

[0040] Further, such as Figure 1-Figure 2As shown, the optical film OCA adhesive layer 104 is connected to a side away from the optical film part with an optical film second release film 105. The optical film second release film 105 is used to protect the optical film OCA adhesive layer 104 to reduce the situation where the optical film OCA adhesive layer 104 is contaminated by dust and other impurities before use. The release film is a special thin film material, and its surface energy can be differentiated, so that the release film has no stickiness or only slight stickiness after contact with specific materials under limited conditions. The release film is usually a silicone release agent coated on a film of environmentally friendly material, so that it has extremely light and stable release force to various organic pressure-sensitive adhesives, such as hot melt adhesives, acrylic adhesives and rubber system pressure-sensitive adhesives. The release film has the characteristics of high transparency, excellent heat resistance, electrical properties, chemical resistance, low density, good molding and processing properties, and excellent safety.

[0041] Embodiment 2 of the optical film structure of the utility model

[0042] The optical film structure of the utility model is further as follows: Figure 1-Figure 2 As shown, the optical film portion includes an optical film substrate 103 connected to a side of the optical film OCA adhesive layer 104 away from the second release film 105 of the optical film. The optical film substrate 103 can be made of: polyester PET, polycarbonate PC or polypropylene PP;

[0043] Polyester PET substrate has good optical properties, mechanical properties and chemical stability. It has high transparency and weather resistance and is suitable for various optical applications.

[0044] Polycarbonate PC has excellent transparency, impact resistance and high temperature resistance. This substrate is suitable for making optical films that require high transparency and toughness.

[0045] Polypropylene PP has excellent chemical resistance and low moisture absorption, making it an ideal choice for certain special optical applications.

[0046] Further, such as Figure 1-Figure 2 As shown, the optical film substrate 103 is connected to a side away from the optical film OCA adhesive layer 104 with an optical film functional layer 102, and the optical film functional layer 102 is an AR layer, an AG layer or an AF layer;

[0047] AR layer, also known as anti-reflective coating or anti-reflective coating, is an optical thin film coating. It is mainly used to reduce the reflectivity of light in a specific wavelength range on the surface due to Fresnel reflection, thereby improving light transmittance and image clarity. AR coating has been widely used in the manufacture of optical devices;

[0048] AG coating is also called anti-glare coating or anti-glare coating. It is a nano-scale spray liquid that is attached to the surface of the product by nano-spraying or spraying. The main function of AG coating is to change the original glass reflective surface into a matte diffuse reflective surface, reduce glare and improve visual comfort. It is mainly used in various panels, such as LCD screens, TVs, car TV goggles, car dashboards and camera lenses. In addition, AG coating also has the advantage of environmental protection, no harm to human contact, and the spraying process does not produce waste liquid discharge;

[0049] AF coating, or anti-fingerprint coating, is a thin film coating used to improve the surface properties of materials. It is mainly used to reduce the traces left by fingerprints and other stains on the surface of materials, making the surface easier to clean and keep clean. AF coating reduces the surface friction coefficient and enhances the surface hydrophobicity, making it difficult for fingerprints, grease, water droplets, etc. to adhere to the surface, thereby improving the surface's anti-fouling properties. This coating is commonly used on the screens and casings of mobile phones, tablets, camera lenses, touch screens and other devices. It can significantly reduce the interference of fingerprints and other stains on visual effects and enhance user experience. AF coating also has excellent wear resistance and scratch resistance, which can protect the material surface from scratches and wear and extend the service life of the equipment.

[0050] Embodiment 3 of the optical film structure of the utility model

[0051] The optical film structure of the utility model is further as follows: Figure 1-Figure 2 As shown, the side of the optical film functional layer 102 away from the optical film substrate 103 is connected to the optical film first release film 101, and the optical film first release film 101 is bonded to the side of the PET film OCA adhesive layer 202 away from the PET film layer 201. The setting of the optical film first release film 101 can reduce the situation where the optical film functional layer 102 is scratched before being adhered to the PET film OCA adhesive layer 202.

[0052] Furthermore, the viscosity of the PET film OCA adhesive layer 202 is lower than that of the optical film OCA adhesive layer 104 , and the optical film first release film 101 and the PET film OCA adhesive layer 202 can be easily separated after pasting, and the flattening component 2 can be reused.

[0053] When in use, place the PET film layer 201 on the table, use the camera to grab the corner of the optical film for alignment, then tear off the second release film 105 of the optical film, attach the cover plate to the optical film OCA adhesive layer 104, and then roll it with a roller to make the optical film OCA adhesive layer 104 and the cover plate fit together. After the bonding is completed, separate the PET film OCA adhesive layer 202 from the first release film 101 of the optical film.

[0054] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model 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 utility model more thorough and comprehensive. Although the utility model 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 replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. An optical film structure, characterized in that: include: An optical film body (1), the optical film body (1) comprising an optical film portion and an adhesive layer arranged on the optical film portion, a flattening component (2) being arranged on a side of the optical film portion away from the adhesive layer, the flattening component (2) comprising a PET film OCA adhesive layer (202) connected to the optical film portion, a side of the PET film OCA adhesive layer (202) away from the optical film portion being connected to a PET film layer (201), the PET film layer (201) being used to flatten the optical film portion, so as to achieve flatness of the optical film body (1).

2. The optical film structure according to claim 1, characterized in that: The outer dimensions of the flattening component (2) are greater than the outer dimensions of the optical film body (1).

3. The optical film structure according to claim 2, characterized in that: The thickness and hardness of the flattening component (2) are greater than the thickness and hardness of the optical film body (1).

4. The optical film structure according to claim 3, characterized in that: The thickness of the flattening component (2) is 0.3 mm, and the thickness of the optical film body (1) is less than 0.1 mm.

5. The optical film structure according to claim 4, characterized in that: The adhesive layer is an optical film OCA adhesive layer (104), and the optical film OCA adhesive layer (104) is connected to a side of the optical film portion away from the PET film OCA adhesive layer (202).

6. The optical film structure according to claim 5, characterized in that: A side of the optical film OCA adhesive layer (104) away from the optical film portion is connected to an optical film second release film (105), and the optical film second release film (105) is used to protect the optical film OCA adhesive layer (104).

7. The optical film structure according to claim 6, characterized in that: The optical film portion comprises an optical film substrate (103) connected to a side of the optical film OCA adhesive layer (104) away from the second release film (105) of the optical film.

8. The optical film structure according to claim 7, characterized in that: The optical film substrate (103) has a surface that is away from the optical film OCA adhesive layer (104) connected to an optical film functional layer (102).

9. The optical film structure according to claim 8, characterized in that: The side of the optical film functional layer (102) away from the optical film substrate (103) is connected to the optical film first release film (101), and the optical film first release film (101) is bonded to the side of the PET film OCA adhesive layer (202) away from the PET film layer (201).

10. The optical film structure according to claim 9, characterized in that: The viscosity of the PET film OCA adhesive layer (202) is lower than the viscosity of the optical film OCA adhesive layer (104).

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