Protective film and film pasting method thereof

Abstract

The invention belongs to the technical field of protective films, and particularly relates to a protective film and a film pasting method thereof.The protective film comprises a release layer, a use layer, a base layer and a surface layer, the release layer, the use layer, the base layer and the surface layer are sequentially arranged from inside to outside, the release layer is attached to the bottom side of the use layer, the base layer is attached to the top side of the use layer, and the surface layer is attached to the base layer; the base layer is larger than the use layer in area and covers the use layer. The protective film pasting method comprises the steps that a mechanical arm and a plurality of suction nozzles are provided, the multiple suction nozzles are connected to the mechanical arm, and a protective film with a stripped release layer is picked up through the mechanical arm. According to the protective film and the film pasting method thereof provided by the invention, the base layer is larger than the use layer, the edge of the pasted protective film after pressure maintaining and curing is relatively round and better in hand feeling, and a manipulator adopts a mode of gradually pasting the film and stripping the surface layer, so that hollowing or bubble generation of the protective film can be avoided, and the pasted film is smoother.

Description

Technical Field

[0001] The present invention belongs to the technical field of protective films, and particularly relates to a protective film and a method for applying the film. Background Art

[0002] During daily use, the surfaces of some electronic devices are prone to scratches or abrasions. Therefore, these electronic devices need to be covered with a film for protection, such as a mobile phone screen. Currently, when applying a film to a mobile phone using a film applicator, air bubbles are easily generated, resulting in a failed film application.

[0003] In the existing invention disclosure patent document with the authorized announcement number CN110576591A and the name "Automatic Protective Film Application Method", in this patent document, a protective film with a release paper is placed on a jig 10. Since there are suction holes 13 on the jig 10 for suction, the protective film can be adsorbed flat. Then, the release paper is torn off, and the product is attached to the protective film, and the protective film and the product can be adjusted to be in full-surface horizontal contact. In the above technical solution, the edge of the protective film bulges. After the protective film is attached to the product, the edge of the protective film is relatively rough, resulting in a poor hand feeling. Also, in the above technical solution, a mechanical arm is used to place the protective film with the release paper on the jig 10. The end of the mechanical arm is connected to a suction cup, and the mechanical arm adsorbs the protective film through the suction cup. The vacuum cavity 14 of the jig 10 is connected to a vacuum pump for vacuuming. When vacuuming, the suction holes 13 suck air, tightly adsorbing the protective film on the jig 10 to ensure that the protective film is in a flat state on the jig 10. Then, the mechanical arm adsorbs and tears off the release paper of the protective film through the suction cup. Since the mechanical arm adsorbs and tears off the release paper of the protective film after the protective film is attached flat, during the process of the mechanical arm adsorbing and tearing off the release paper of the protective film through the suction cup, it is easy to adsorb the attached protective film or cause the protective film to have air pockets, resulting in an uneven film application. Summary of the Invention

[0004] The purpose of the present invention is to provide a protective film, aiming to solve the technical problems in the prior art that the edge of the protective film bulges, and after the protective film is attached to the product, the edge of the protective film is relatively rough, resulting in a poor hand feeling, and during the process of the mechanical arm adsorbing and tearing off the release paper of the protective film through the suction cup, it is easy to adsorb the attached protective film or cause the protective film to have air pockets, resulting in an uneven film application.

[0005] To achieve the above purpose, the protective film provided by an embodiment of the present invention includes a release layer, a use layer, a base layer, and a surface layer. The release layer, the use layer, the base layer, and the surface layer are sequentially arranged from the inside out. The release layer is attached to the bottom side of the use layer, the base layer is attached to the top side of the use layer, and the surface layer is attached to the base layer; the area of the base layer is larger than that of the use layer and covers the use layer.

[0006] As an optional solution of the present invention, the surface area of the release layer is larger than that of the use layer.

[0007] As an alternative embodiment of the present invention, an anti-sticking area is provided on the base layer, and the anti-sticking area is disposed on one side of the surface layer.

[0008] As an alternative embodiment of the present invention, a surface layer tangent line is provided on the surface layer. A tearing area is formed on the surface layer from the position of the surface layer tangent line towards the middle area of the surface layer, and the tearing area faces the anti-sticking area.

[0009] Based on the same inventive concept, the present application also provides a method for applying a protective film, which includes:

[0010] S1: Provide a robotic arm and a plurality of suction nozzles. The plurality of suction nozzles are connected to the robotic arm. Pick up the protective film from which the release layer has been peeled off through the robotic arm, move the protective film above the protective layer of the electronic device through the robotic arm, and place it in a parallel state, and adjust it to a specified height for the bonding operation;

[0011] S2: Provide a pressure roller. Press one end of the protective film onto the surface of the electronic device screen through the pressure roller to prepare for bonding, and the other end is kept sucked or lifted by the robotic arm and is in a suspended state;

[0012] S3: Provide a film applying device. The pressure roller and the film applying device roll from one end of the protective film to the other end. During this process, the robotic arm keeps adsorbing the surface layer of the protective film. The pressure roller presses the used layer and the base layer of the protective film onto the surface of the electronic device screen for bonding. As the pressure roller moves, due to the height difference, the adsorbed surface layer will be gradually peeled off, and the unpeeled part can lift the protective film to keep the height from contacting the surface of the electronic device; until the pressure roller completely bonds the protective film to the surface of the electronic device, the surface layer of the protective film is also completely peeled off.

[0013] As an alternative embodiment of the present invention, move the electronic device to which the protective film has been bonded to a pressure maintaining and curing chamber for curing; since the area of the base layer is larger than that of the used layer, after pressure maintaining and curing, the base layer closely adheres to the used layer and wraps the used layer.

[0014] One or more of the above technical solutions in the protective film provided by the embodiments of the present invention have at least one of the following technical effects:

[0015] The protective film provided by the present application and its film - pasting method include a release layer, a use layer, a base layer, and a surface layer. The area of the base layer is larger than that of the use layer and covers the use layer. Since the base layer is larger than the use layer, the edge of the protective film formed after pressure - maintaining and curing is relatively round, and the hand - feeling is better. During the film - pasting process, the manipulator continuously adsorbs the surface layer of the protective film, and the pressure roller presses the use layer and the base layer of the protective film onto the surface of the electronic device screen for lamination. As the pressure roller moves, due to the height difference, the adsorbed surface layer will be gradually peeled off. The un - peeled part can lift the protective film and keep it at a height without contacting the surface of the electronic device until the pressure roller completely laminates the protective film on the surface of the electronic device, and the surface layer of the protective film is also completely peeled off. The manipulator uses the method of gradually pasting the film and peeling the surface layer, thereby avoiding air pockets or bubbles in the protective film, and making the film - pasting more flat. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following - described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of the protective film provided by the embodiment of the present invention.

[0018] Figure 2 It is a schematic diagram of the hierarchical structure of the protective film provided by the embodiment of the present invention

[0019] Figure 3 It is a schematic structural diagram of the film - pasting process of the protective film provided by the embodiment of the present invention.

[0020] Figure 4 It is a schematic structural diagram of the film - pasting process of the protective film provided by the embodiment of the present invention.

[0021] Figure 5 It is a schematic structural diagram of the protective film adsorbed by the robotic arm provided by the embodiment of the present invention.

[0022] Figure 6 It is a schematic structural diagram of the protective film adsorbed by the robotic arm provided by the embodiment of the present invention.

[0023] Among them, the reference numerals in the drawings are as follows:

[0024] 1, release layer; 2, use layer; 3, base layer; 4, surface layer; 5, robotic arm; 6, suction nozzle; 7, pressure roller;

[0025] 41, anti - sticking area; 42, surface layer tangent line. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the embodiments of the present invention and should not be construed as limiting the present invention.

[0027] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present invention, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0029] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0030] In one embodiment of the present invention, as Figures 1 to 6 shown, a protective film is provided, including a release layer 1, a use layer 2, a base layer 3, and a surface layer 4. The release layer 1, the use layer 2, the base layer 3, and the surface layer 4 are arranged in sequence from the inside to the outside. The release layer 1 is attached to the bottom side of the use layer 2, the base layer 3 is attached to the top side of the use layer 2, and the surface layer 4 is attached to the base layer 3; the area of the base layer 3 is larger than that of the use layer 2 and covers the use layer 2. Since the base layer 3 is larger than the use layer 2, the edge of the protective film formed by laminating after pressure curing will be relatively round and the hand feeling will be better.

[0031] In another embodiment of the present invention, the surface area of the release layer 1 of the protective film is larger than that of the use layer 2, so that the release layer 1 can effectively protect the use layer 2.

[0032] In another embodiment of the present invention, an anti-sticking area 41 is provided on the base layer 3 of the protective film, and the anti-sticking area 41 is arranged on one side of the surface layer 4. By making the anti-sticking area 41 on the base layer 3, the part of the surface layer 4 facing the anti-sticking area 41 will not adsorb to the base layer 3, so that the surface layer 4 can be peeled off better.

[0033] In another embodiment of the present invention, a surface layer tangent line 42 is provided on the surface layer 4 of the protective film. The position of the surface layer tangent line 42 forms a tearing area on the surface layer 4 towards the middle area of the surface layer 4, and the tearing area faces the anti-sticking area 41. By setting the tearing area and the anti-sticking area 41, it can effectively prevent the surface layer 4 from completely adhering to the base layer 3, thus facilitating the tearing of the surface layer 4 from the base layer 3.

[0034] Based on the same inventive concept, the present application also provides a method for applying a protective film, and the method for applying a protective film includes:

[0035] S1: Provide a robotic arm 5 and a plurality of suction nozzles 6. The plurality of suction nozzles 6 are fixedly connected to the robotic arm 5. The robotic arm 5 picks up the protective film from which the release layer 1 has been peeled off, and the robotic arm moves the protective film above the protective layer of the electronic device, in a parallel state, and adjusts to a specified height for the fitting operation;

[0036] S2: Provide a pressure roller 7. One end of the protective film is pressed onto the surface of the electronic device screen by the pressure roller 7 for preparation of fitting, and the other end remains sucked or lifted by the robotic arm 5 and is in a suspended state;

[0037] S3: Provide a film-applying device. The pressure roller 7 cooperates with the film-applying device to roll from one end of the protective film to the other end. During this process, the robotic arm 5 keeps adsorbing the surface layer 4 of the protective film. The pressure roller 7 presses the use layer 2 and the base layer 3 of the protective film onto the surface of the electronic device screen for fitting. As the pressure roller 7 moves, due to the height difference, the adsorbed surface layer 4 will be gradually peeled off, and the non-peeled part can lift the protective film to keep the height from contacting the surface of the electronic device; until the pressure roller 7 completely fits the protective film on the surface of the electronic device, the surface layer 4 of the protective film is also completely peeled off.

[0038] In another embodiment of the present invention, the electronic device with the protective film already applied is moved to a pressure-holding and curing chamber for curing; since the area of the base layer 3 is larger than that of the use layer 2, after pressure-holding and curing, the base layer 3 closely adheres to the use layer 2 and wraps the use layer 2. After pressure-holding and curing, the edge of the applied protective film will be relatively round and the hand feeling will be better.

[0039] During the film application process, the manipulator continuously adsorbs the surface layer 4 of the protective film. The pressure roller 7 presses the usage layer 2 and the base layer 3 of the protective film onto the surface of the electronic device screen for fitting. The pressure roller 7 is used to lower one end of the protective film to the surface of the electronic device, and then the film application device is used to push the pressure roller 7 towards the other end to fit the protective film with the electronic device. As the pressure roller 7 moves, due to the height difference, the adsorbed surface layer 4 will be gradually peeled off. The unpeeled part can lift the protective film and keep it at a height without contacting the surface of the electronic device until the pressure roller 7 completely fits the protective film on the surface of the electronic device and the surface layer 4 of the protective film is also completely peeled off. The manipulator adopts the method of gradually applying the film and peeling off the surface layer 4, so as to avoid air pockets or bubbles in the protective film and make the film application more flat.

[0040] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A protective film, characterized in that: It includes a release layer, a use layer, a base layer and a surface layer, which are arranged in sequence from the inside to the outside, the release layer is attached to the bottom side of the use layer, the base layer is attached to the top side of the use layer, and the surface layer is attached to the base layer; the area of ​​the base layer is larger than that of the use layer and covers the use layer.

2. A protective film according to claim 1, characterized in that: The surface area of ​​the release layer is larger than that of the service layer.

3. A protective film according to claim 2, characterized in that: The base layer is provided with an anti-sticking area, and the anti-sticking area is arranged on one side of the surface layer.

4. A protective film according to claim 3, characterized in that: A surface tangent line is arranged on the surface layer, and a tearing area is formed on the surface layer from the surface tangent line toward the middle area of ​​the surface layer, and the tearing area is opposite to the anti-sticking area.

5. A protective film laminating method, based on the protective film according to any one of claims 1 to 4, characterized in that: The protective film laminating method comprises: S1: providing a robot arm and a plurality of nozzles, wherein the plurality of nozzles are connected to the robot arm, and the robot arm picks up the protective film from which the release layer has been peeled off, and the robot arm moves the protective film to the upper part of the protective layer of the electronic device in a parallel state, and adjusts it to a specified height for laminating; S2: providing a pressure roller, through which one end of the protective film is pressed to the surface of the electronic device screen for lamination, while the other end is kept sucked or lifted by the mechanical arm in a suspended state; S3: A film laminating device is provided, wherein the pressure roller cooperates with the film laminating device to roll from one end of the protective film to the other end. During this process, the mechanical arm keeps adsorbing the surface layer of the protective film, and the pressure roller presses the use layer and the base layer of the protective film down to the surface of the electronic device screen for laminating. As the pressure roller moves, the adsorbed surface layer will be gradually peeled off due to the height difference, and the protective film can be lifted at the unpeeled part to maintain a height that will not touch the surface of the electronic device; until the pressure roller completely adheres the protective film to the surface of the electronic device and the surface layer of the protective film is also completely peeled off.

6. A protective film laminating method according to claim 5, characterized in that: The bonded electronic device is moved to a pressure-maintaining and curing chamber for curing. Since the base layer is larger in area than the use layer, after pressure-maintaining and curing, the base layer is closely attached to the use layer and wraps the use layer.

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