Ultrathin folding screen integrated protective film without interface adhesive layer

Abstract

The utility model relates to the technical field of screen protection films, and discloses an ultrathin folding screen integrated protection film without an interface adhesive layer, which comprises an interface adaptation layer, a dynamic buffer layer and a surface function layer which are sequentially connected, the surface function layer adopts an HC film, the dynamic buffer layer adopts a polyurethane optical elastomer, and the interface adaptation layer is made of an adhesive layer. And the dynamic buffer layer is integrated with the surface functional layer in a coating manner. According to the utility model, the dynamic buffer layer is integrated with the surface functional layer in a coating manner, so that an OCA (Optical Clear Adhesive) layer added between the HC film and the buffer layer of the traditional folding screen protective film is integrally reduced, one procedure can be reduced in the whole preparation process, the yield is improved, the overall thickness of the protective film is effectively reduced, and the production cost is reduced. The structure can be reduced to 65% of that of a traditional structure, the touch operation can be more sensitive, fingernail indentation residues caused by an OCA soft layer are eliminated, and the overall structure is more stable.

Description

Technical Field

[0001] This utility model relates to the field of screen protector technology, and in particular to an ultra-thin integrated protective film for foldable screens without an interface adhesive layer. Background Technology

[0002] The use and promotion of foldable screen phones are becoming increasingly mature. The screen protector used in foldable screen phones has a structure of multiple layers of materials stacked together.

[0003] Currently, traditional foldable screen protectors add an OCA adhesive layer between the HC film and the buffer layer. However, this method inevitably increases the overall thickness of the protector, resulting in insufficient touch sensitivity. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing an ultra-thin integrated protective film for foldable screens without an interface adhesive layer.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An ultra-thin integrated protective film for foldable screens without an interface adhesive layer includes an interface adaptation layer, a dynamic buffer layer, and a surface functional layer connected in sequence. The surface functional layer is made of HC film, and the dynamic buffer layer is made of polyurethane optical elastomer. The dynamic buffer layer is integrated with the surface functional layer by coating.

[0007] Preferably, the thickness of the surface functional layer is between 25 and 80 μm.

[0008] Preferably, the thickness of the dynamic buffer layer is between 25 μm and 80 μm.

[0009] Preferably, the interface adapter layer is made of low-modulus OCA with a modulus of <1.0MPa and a thickness between 10-30μm.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This invention integrates the dynamic buffer layer with the surface functional layer through coating, thereby reducing the OCA adhesive layer added between the HC film and the buffer layer in traditional foldable screen protective films. This reduces one step in the entire manufacturing process, improves the yield rate, and effectively reduces the overall thickness of the protective film to 65% of the traditional structure. Touch operation is more sensitive, and the nail indentation residue caused by the OCA soft layer is eliminated, resulting in a more stable overall structure. Attached Figure Description

[0012] Figure 1This is a schematic diagram of an ultra-thin integrated protective film for foldable screens without an interface adhesive layer, as proposed in this utility model.

[0013] In the diagram: 1. Interface adaptation layer; 2. Dynamic buffer layer; 3. Surface function layer. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] Reference Figure 1 An ultra-thin integrated protective film for foldable screens without an interface adhesive layer includes an interface adaptation layer 1, a dynamic buffer layer 2, and a surface functional layer 3 connected in sequence. The surface functional layer 3 is made of HC film, and the dynamic buffer layer 2 is made of polyurethane optical elastomer. The dynamic buffer layer 2 is integrated with the surface functional layer 3 by coating.

[0016] Compared to existing technologies, this protective film employs an innovative interlayer composite technology. By integrating the dynamic buffer layer 2 with the surface functional layer 3 through coating, it breaks through the traditional sandwich structure of film materials. Revolutionarily, it eliminates the OCA optical adhesive layer between the HC substrate and the buffer layer, reducing a key process in the entire manufacturing process, improving yield, and providing process feasibility assurance for large-scale production. It also effectively reduces the overall thickness of the protective film. The integrated molding technology reduces the overall thickness to 65% of the traditional structure, creating more space for the lightweight design of foldable screen terminals. It eliminates the touch delay effect caused by the OCA soft adhesive layer, effectively improving the screen response speed and achieving a silky touch experience closer to that of a bare screen. It effectively solves the problem of fingernail indentation residue caused by OCA layer creep in traditional film materials, ensuring that the screen surface remains as good as new for a long time.

[0017] In this embodiment, the surface functional layer 3 is an HC film, which consists of a 25, 50 or 75 μm Pet original film and an HC hardened coating on the surface of the Pet original film with a thickness of 1-5 μm. It mainly serves to resist scratches and is used as a surface. When not in use, the surface is generally covered with a release film with a thickness between 25-80 μm.

[0018] In this embodiment, the dynamic buffer layer 2 is made of polyurethane optical elastomer, specifically polyester TPU, with a thickness between 25μm and 80μm.

[0019] In this embodiment, the interface adapter layer 1 is made of low-modulus OCA and mainly serves as an adhesive buffer. It is directly bonded to the screen surface. When not in use, the bottom is generally bonded with a release film with a modulus of <1.0MPa and a thickness between 10-30μm.

[0020] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An ultra-thin integrated protective film for foldable screens without an interface adhesive layer, comprising an interface adaptation layer, a dynamic buffer layer, and a surface functional layer sequentially connected, characterized in that: The surface functional layer is made of HC film, and the dynamic buffer layer is made of polyurethane optical elastomer. The dynamic buffer layer is integrated with the surface functional layer by coating.

2. The ultra-thin integrated protective film for foldable screens without an interface adhesive layer according to claim 1, characterized in that: The thickness of the surface functional layer is between 25 and 80 μm.

3. The ultra-thin integrated protective film for foldable screens without an interface adhesive layer according to claim 1, characterized in that: The thickness of the dynamic buffer layer is between 25μm and 80μm.

4. The ultra-thin integrated protective film for foldable screens without an interface adhesive layer according to claim 1, characterized in that: The interface adapter layer is made of low-modulus OCA with a modulus of <1.0MPa and a thickness between 10-30μm.

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