A cast static protective film for hardening PC sheet and a static protective film product

Abstract

The utility model relates to the field of hard PC sheet protection film, especially a kind of for hard PC sheet's casting static protection film and static protection film product, casting static protection film specifically includes: adhesive layer, core material layer and surface layer, wherein core material layer is located between adhesive layer and surface layer;Adhesive layer is used to directly contact with PC sheet, and is adsorbed on PC sheet surface by means of static electricity;The adhesive force of adhesive layer is 0.07 N / mm-0.3 N / mm.The casting static protection film for hard PC sheet provided in the application has three-layer structure, and at the connecting place of different layers, specific texture is formed at the connecting place by the press roller with specific texture on surface in the extrusion process, then compression is carried out, so that internal stress is dispersed when cutting, and the adhesion of cut is reduced as much as possible in the process of roll cutting and trimming cutting, which is convenient for cutting.

Description

Technical Field

[0001] This utility model relates to the field of protective film technology for hardened PC sheets, and in particular to a cast electrostatic protective film and electrostatic protective film product for hardened PC sheets. Background Technology

[0002] PC sheets are ubiquitous in daily life, and products made from them are widely used in both daily life and industrial production. To meet the ever-increasing technological demands of these industries, engineers need to improve the impact resistance and weather resistance of PC sheets while preserving their high light transmittance. This is to meet the specific needs of rapidly advancing technological fields, such as lenses in optics and displays, transparent panels in electronics, sunroofs in automobiles, safety shields in construction, and protective layers for solar panels in new energy. However, traditional protective films for PC sheets can experience adhesion at the cut edges during the film-cutting process, leading to folding of the protective film on one side.

[0003] Therefore, it is necessary to develop a cast electrostatic protective film for hardened PC sheets. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art.

[0005] First, this utility model provides a cast electrostatic protective film for hardened PC sheets, which specifically includes: an adhesive layer, a core layer and a surface layer, wherein the core layer is located between the adhesive layer and the surface layer; the adhesive layer is used to directly contact the PC sheet and is electrostatically adsorbed onto the surface of the PC sheet;

[0006] A first discontinuity structure is provided between the adhesive layer and the core material layer, and a second discontinuity structure is provided between the core material layer and the surface layer. The projection of the second discontinuity structure on the plane of the first discontinuity structure is perpendicular to the projection of the first discontinuity structure.

[0007] The adhesive strength of the adhesive layer is 0.07 N / mm-0.3 N / mm.

[0008] As a further improvement to the above technical solution, the thickness of the electrostatic protective film used for PC sheets is 20 micrometers to 100 micrometers.

[0009] As a further improvement to the above technical solution, the thickness ratio of the adhesive layer to the core layer is (1-3):(4-8).

[0010] As a further improvement to the above technical solution, the thickness ratio of the adhesive layer to the core layer is (2-3):(5-6).

[0011] As a further improvement to the above technical solution, the thickness ratio of the core layer to the surface layer is (4-8):(1-3).

[0012] As a further improvement to the above technical solution, the thickness ratio of the core layer to the surface layer is (5-7):(1-2).

[0013] As a further improvement to the above technical solution, the ratio of the adhesive layer to the core layer and the surface layer, in terms of thickness, is 2:6:2.

[0014] As a further improvement to the above technical solution, the surface layer has a printed texture on the side away from the core material layer.

[0015] Secondly, this application also provides an electrostatic protective film product, which is specifically a film roll formed by winding the above-mentioned electrostatic protective film for PC sheets.

[0016] As a further improvement to the above technical solution, the membrane roll is cylindrical or elliptical cylindrical.

[0017] Beneficial effects: The electrostatic protective film of PC sheet provided in this application has a three-layer structure. At the joint of different layers, a specific texture is formed at the joint by a pressure roller with a specific surface texture during the extrusion process, and then the layers are pressed together. This disperses the internal stress during cutting, and minimizes the adhesion of the cut edges during the roll cutting and trimming cutting process, making cutting easier.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic diagram of the structure of a cast electrostatic protective film for hardened PC sheets in one direction provided by this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of a cast electrostatic protective film for hardened PC sheets provided by this utility model in another direction;

[0022] Figure 3 A schematic diagram of the structure of a cast electrostatic protective film for hardened PC sheet before it is extruded in one direction, according to this utility model.

[0023] Figure 4A schematic diagram of the structure of a cast electrostatic protective film for hardened PC sheets before it is extruded in another direction, according to this utility model.

[0024] In the attached diagram: 01 - surface layer; 02 - core material layer; 03 - adhesive layer. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0028] The following is combined with Figures 1-4 The specific embodiments of this utility model are described below.

[0029] First, this utility model provides a cast electrostatic protective film for hardened PC sheets, which specifically includes: an adhesive layer, a core layer and a surface layer, wherein the core layer is located between the adhesive layer and the surface layer; the adhesive layer is used to directly contact the PC sheet and is electrostatically adsorbed onto the surface of the PC sheet;

[0030] A first discontinuity structure is provided between the adhesive layer and the core material layer, and a second discontinuity structure is provided between the core material layer and the surface layer. The projection of the second discontinuity structure on the plane of the first discontinuity structure is perpendicular to the projection of the first discontinuity structure.

[0031] like Figure 1 and Figure 2 As shown, the basic structure of the electrostatic protective film for PC sheets provided in this application is as follows: Figure 1As shown, a sandwich-like structure is formed by a surface layer and an adhesive layer, sandwiching the core material layer in the middle. During its preparation, before the three-layer structure is extruded and bonded, a textured roller is used to press out a specific texture. During the subsequent three-layer pressing process, the pressure is controlled to retain fine, mutually perpendicular indentation structures on the electrostatic protective film for the PC sheet. Simultaneously, the surface layer serves as the carrier for screen printing, and the adhesive layer serves as the bonding layer for the PC sheet, combining with the core material layer to produce excellent results at a specific thickness ratio. Furthermore, the second discontinuous structure is perpendicular to the first discontinuous structure. Specifically, during the preparation process, adhesive is sprayed at intervals using a mask, forming a uniform discontinuous adhesive structure. This allows the joints of the core material layer, surface layer, and adhesive layer to have stresses dispersed in different directions when facing cuts in multiple directions, making it easier to cut the film during production and preventing adhesion. Moreover, the specific embodiments provided in this application avoid using expensive materials as adhesive layer additives, reducing usage costs.

[0032] Combination Figures 1-4 More specifically, in this particular embodiment of the present application, the cross-sections of the first discontinuous structure and the second discontinuous structure formed by the pressure roller are equilateral right-angled triangles (e.g., ...). Figure 3 and Figure 4 As shown), this structure facilitates the tight bonding while maintaining a certain degree of gap during the subsequent three-layer co-extrusion process, making it easier to cut (as shown). Figure 1 and Figure 2 (As shown).

[0033] In this specific embodiment of the present invention, the adhesive force of the adhesive layer is 0.07 N / mm-0.3 N / mm.

[0034] Through the above combination, the electrostatic protective film for PC sheets provided in this application can achieve excellent adhesion, thereby effectively preventing it from falling off during application to PC sheets and bringing better practical use results.

[0035] In this specific embodiment of the present invention, the thickness of the electrostatic protective film used for PC sheets is 20 micrometers to 100 micrometers.

[0036] More specifically, in this embodiment, the thickness of the electrostatic protective film on the provided PC sheet is 30 micrometers, and the strength and cost of this thickness of electrostatic protective film are well matched to current needs.

[0037] In this specific embodiment of the present invention, the thickness ratio of the adhesive layer to the core material layer is (1-3):(4-8).

[0038] In one embodiment of this specific implementation of the application, the thickness ratio of the adhesive layer to the core layer is 1:4, and this ratio of adhesive layer and core layer can meet some requirements.

[0039] In this specific embodiment of the present invention, the thickness ratio of the adhesive layer to the core material layer is (2-3):(5-6).

[0040] In one embodiment of this specific implementation of the application, the thickness ratio of the adhesive layer to the core layer is 3:5. The specific product formed by the adhesive layer and the core layer with this ratio can have excellent electrostatic bonding performance and strength.

[0041] In this specific embodiment of the present invention, the thickness ratio of the core layer to the surface layer is (4-8):(1-3).

[0042] In one embodiment of this specific implementation of the application, the thickness ratio of the core layer to the surface layer is 4:1. Under this ratio, although the surface layer is thinner, it can still reduce costs to a certain extent.

[0043] In this specific embodiment of the present invention, the thickness ratio of the core layer to the surface layer is (5-7):(1-2).

[0044] In one embodiment of this specific implementation of the application, the thickness ratio of the core layer to the surface layer is 5:2. Under this ratio, the resulting product has excellent surface properties and core load-bearing capacity.

[0045] In this specific embodiment of the present invention, the ratio of the adhesive layer to the core layer and the surface layer, based on thickness, is 2:6:2.

[0046] In one embodiment of this application, the present invention provides a more specific composition ratio between the adhesive layer, the core layer, and the surface layer. Products formed under this ratio are more suitable for use with certain specific PC sheets.

[0047] In this specific embodiment of the present invention, the surface layer has a printed texture on the side away from the core material layer. The printed texture on the surface layer can retain product-related information and can also be used to print various patterns or text to meet diverse needs.

[0048] Secondly, this application also provides an electrostatic protective film product, which is specifically a film roll formed by winding the above-mentioned electrostatic protective film for PC sheets.

[0049] In this specific embodiment of the present invention, the membrane roll is cylindrical or elliptical cylindrical; specifically, in this specific embodiment, a cylindrical membrane roll is used.

[0050] In this specific embodiment of the present invention, the raw materials used to prepare the surface layer include, by weight, 20-50 parts of linear PE, 50-80 parts of metallocene PE, and 1-5 parts of PP.

[0051] In this specific embodiment of the present invention, the raw materials used to prepare the core layer include, by weight, 27-61 parts of linear PE, 47-82 parts of metallocene PE, and 1-5 parts of PP.

[0052] In this specific embodiment of the present invention, the raw materials used to prepare the adhesive layer, by weight, include 15-51 parts of linear PE, 51-75 parts of metallocene PE, 1-6 parts of PP, and 5-20 parts of PE-modified polymer.

[0053] In one specific embodiment provided in this application, the core material layer with a specific composition can achieve excellent compatibility with the surface layer and the adhesive layer, thereby forming a more reliable performance.

[0054] In this specific embodiment of the present invention, the raw materials used to prepare the core layer include, by weight, 30-50 parts of linear PE, 50-80 parts of metallocene PE, and 1-5 parts of PP.

[0055] In a specific embodiment provided by this utility model, the core material layer composed of a specific number of raw materials can reduce costs while maintaining high performance.

[0056] When specific PE-modified polymers are applied to the electrostatic protective film for PC sheets provided by this invention, they can interact with the raw materials therein to produce superior performance.

[0057] A specific electrostatic protective film for PC sheets, consisting of a surface layer, a core layer, and an adhesive layer of a preferred thickness, can provide economical cost and convenient production while ensuring high strength and a high yield rate.

[0058] In this specific embodiment of the present invention, the raw material for the surface layer also includes color masterbatch.

[0059] Preferably, the dye used in the surface layer is a green dye. By using a green dye, the screen printing pattern produced during the screen printing process of the surface layer can have high contrast, making it easier to quickly detect potential quality problems during quality inspection.

[0060] In some specific implementations, by weight, the raw materials used for the surface layer include 20-50 parts linear PE, 50-80 parts metallocene PE, and 1-5 parts PP; the raw materials used to prepare the core layer include 20-50 parts linear PE, 50-80 parts metallocene PE, and 1-5 parts PP; and the raw materials used to prepare the adhesive layer include 15-51 parts linear PE, 51-75 parts metallocene PE, 1-6 parts PP, and 5-20 parts PE-modified polymer.

[0061] In another specific embodiment provided in this application, the surface layer, core layer, and adhesive layer are combined with raw materials of a specific mass fraction, and the resulting protective film has better low crystal point and high adhesion characteristics. It is less expensive while not contaminating the sheet, making it more suitable for mass production.

[0062] Although the description of this application has been quite detailed and particularly focused on several of the described embodiments, it is not intended to limit itself to any of these details or embodiments or any particular embodiment. Rather, it should be considered as providing a broad possible interpretation of the claims by referring to the appended claims and taking into account the prior art, thereby effectively covering the intended scope of this application. Furthermore, the foregoing description of this application with respect to embodiments foreseeable by the applicant is intended to provide a useful description, and non-substantial modifications to this application that have not yet been foreseen may still represent equivalent modifications.

Claims

1. A cast electrostatic protective film for hardened PC sheets, characterized in that, include: An adhesive layer, a core layer, and a surface layer, wherein the core layer is located between the adhesive layer and the surface layer; The adhesive layer is used to directly contact the PC sheet and is adsorbed onto the surface of the PC sheet by means of electrostatic adsorption; A first discontinuity structure is provided between the adhesive layer and the core material layer, and a second discontinuity structure is provided between the core material layer and the surface layer. The projection of the second discontinuity structure onto the plane of the first discontinuity structure is perpendicular to the projection of the first discontinuity structure. The adhesive strength of the adhesive layer is 0.07 N / mm to 0.3 N / mm.

2. The cast electrostatic protective film for hardened PC sheets according to claim 1, characterized in that, The thickness of the cast electrostatic protective film used for hardened PC sheets is 20 micrometers to 100 micrometers.

3. The cast electrostatic protective film for hardened PC sheets according to claim 1, characterized in that, The thickness ratio of the adhesive layer to the core layer is (1-3):(4-8).

4. The cast electrostatic protective film for hardened PC sheets according to claim 3, characterized in that, The thickness ratio of the adhesive layer to the core layer is (2-3):(5-6).

5. The cast electrostatic protective film for hardened PC sheets according to claim 2, characterized in that, The thickness ratio of the core layer to the surface layer is (4-8):(1-3).

6. The cast electrostatic protective film for hardened PC sheets according to claim 5, characterized in that, The thickness ratio of the core layer to the surface layer is (5-7):(1-2).

7. The cast electrostatic protective film for hardened PC sheets according to claim 1, characterized in that, The ratio of the adhesive layer to the core layer and the surface layer, in terms of thickness, is 2:6:

2.

8. The cast electrostatic protective film for hardened PC sheets according to claim 1, characterized in that, The surface layer has a printed texture on the side away from the core layer.

9. An electrostatic protective film product, characterized in that, The film roll includes the film roll formed by winding the cast electrostatic protective film for hardening PC sheets as described in any one of claims 1-8.

10. The electrostatic protective film product according to claim 9, characterized in that, The membrane roll is cylindrical or elliptical.

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