Protective film and manufacturing method and using method thereof

Abstract

The invention discloses a protective film, and relates to the technical field of mobile phone protective films, the protective film comprises a first release film layer, a use layer, a first protective layer, a first PET layer, two groups of auxiliary material layers and two groups of second PET layers, the first release film layer, the use layer, the first protective layer and the first PET layer are bonded in order, the two groups of auxiliary material layers are respectively positioned at the upper end and the lower end of the use layer and are both adhered to the first protective layer, the thickness of the auxiliary material layers is equal to the sum of the thickness of the first release film layer and the thickness of the use layer, and the two groups of second PET layers are respectively positioned at the upper end and the lower end of the first PET layer and are both adhered to the first protective layer; the invention further discloses a manufacturing method and a using method of the protective film, the manufacturing cost is further reduced, the purpose of more accurate alignment film pasting is achieved, obvious marks are prevented from being left at the cut-off position, and the attractiveness degree of the pasted film is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile phone protective films, and particularly relates to a protective film, a manufacturing method thereof, and a using method thereof. Background Art

[0002] With the development of electronic technology, curved display screens (double-curved or equal-depth four-curved) are increasing day by day. The flexible material protective film has obvious advantages over the glass material in protecting the curved display screen; however, due to the characteristics of the flexible protective film material, the existing protective film for cutting has the following problems in the process of manufacturing, cutting, and laminating: 1. Since the flexible material protective film for cutting is soft, the method of attaching it to the object to be attached is to push it from the middle to both sides to ensure smooth lamination and no bubbles; therefore, the release layer of the existing protective film for cutting needs to be cut off, and obvious imprints are left on the adhesive surface of the use layer at the cut-off position. Furthermore, after the use layer is attached to the object to be attached, obvious imprints still remain; 2. The existing protective film for cutting can only be used for manual alignment and attachment to the object to be attached after cutting, resulting in difficulty in accurately aligning the position of the protective film. Summary of the Invention

[0003] The purpose of the present invention is to ensure that no obvious imprints are left after the use layer is attached to the object to be attached, and to be able to more accurately align the position for film lamination.

[0004] In order to achieve the above purpose, the technical solutions adopted by the present invention are as follows:

[0005] A protective film includes a first release film layer, a use layer, a first protective layer, a first PET layer, two auxiliary layers, and two second PET layers. The first release film layer, the use layer, the first protective layer, and the first PET layer are adhesively bonded in sequence. The two auxiliary layers are respectively located at the upper and lower ends of the use layer, and both of the two auxiliary layers are adhesively bonded to the first protective layer. The thickness of the auxiliary layer is equal to the sum of the thicknesses of the first release film layer and the use layer. The two second PET layers are respectively located at the upper and lower ends of the first PET layer, and both of the two second PET layers are adhesively bonded to the first protective layer.

[0006] Further, the thicknesses of the first PET layer and the second PET layer are equal.

[0007] A manufacturing method of a protective film as described above includes the following steps:

[0008] Step 1: Prepare the main material coil. Tear off the thicker second release film layer on one side of the main material coil, and tear off the second protective layer on the other side of the main material coil to obtain the use layer. Bond the first release film layer and the first protective layer to the two sides of the use layer respectively;

[0009] Step 2: Prepare the backing layer coil. Tear off the third release film layer on the backing layer coil to obtain the PET layer coil, and bond the PET layer coil to the first protective layer;

[0010] Step 3: Dispose two groups of auxiliary material layers at the upper and lower ends of the usage layer respectively, and bond both groups of auxiliary material layers to the first protective layer to obtain a finished rolled material;

[0011] Step 4: Cut the finished rolled material into a square shape through an upper die, and simultaneously cut the PET layer rolled material into a first PET layer and two groups of second PET layers through a lower die, and make the two groups of second PET layers located at the upper and lower ends of the first PET layer respectively to obtain a protective film.

[0012] A method for using the protective film as described above includes the following steps:

[0013] Step 1: Place the protective film into a cutting machine, cut out the shape of the mobile phone screen sticker required in the middle area of the first release film layer on the protective film according to the requirements of the mobile phone screen, and cut out positioning holes in both groups of auxiliary material layers respectively, and make the positioning holes located in the overlapping area of the auxiliary material layer and the second PET layer, and the cutting depth is equal to the sum of the thicknesses of the first release film layer, the usage layer, and the first protective layer;

[0014] Step 2: Tear off the two groups of second PET layers to expose the positioning holes;

[0015] Step 3: Manually tear off the waste materials of the first release film layer and the usage layer outside the shape of the mobile phone screen sticker to discharge waste for the first release film layer and the usage layer;

[0016] Step 4: Manually tear off the first release film layer at the shape of the mobile phone screen sticker;

[0017] Step 5: Fix the mobile phone on a positioning sticker fixture, clean the mobile phone screen, place the usage layer of the protective film downward, and thread the corresponding positioning holes onto the positioning posts of the positioning sticker fixture;

[0018] Step 6: Use a film-pushing squeegee to push the film and stick the usage layer on the mobile phone screen;

[0019] Step 7: Tear off the first protective layer and the first PET layer so that the usage layer is stuck on the mobile phone screen to complete the film sticking.

[0020] Further, in Step 1, two groups of positioning holes are cut out in each group of auxiliary material layer areas.

[0021] The beneficial effects of the present invention are as follows: By arranging two auxiliary material layers at the upper and lower ends of the use layer respectively, and making the thickness of the auxiliary material layer equal to the sum of the thicknesses of the first release film layer and the use layer, it is beneficial for the cutting machine to cut the first protective layer simultaneously during cutting, thereby realizing the cutting of positioning holes on the first protective layer. On the other hand, by setting two second PET layers and arranging them at the upper and lower ends of the first PET layer respectively, during the positioning operation, only the two second PET layers need to be torn off to expose the positioning holes, which is beneficial for more accurate positioning. Compared with the traditional technology where only manual alignment can be used, the present invention achieves the purpose of more accurate alignment and film application; in addition, the film application method adopted by the present invention is positioning film application, without cutting the release layer of the use layer and pushing it from the middle to both sides, thus avoiding obvious imprints left on the adhesive surface of the use layer at the cutting position and further improving the aesthetic degree of film application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the protective film of the present invention;

[0023] Figure 2 is Figure 1 an enlarged view of part A in

[0024] Figure 3 is Figure 1 an enlarged view of part B in

[0025] Figure 4 is an exploded view of the structure of the protective film of the present invention;

[0026] Figure 5 is a schematic diagram of the protective film of the present invention after being cut by a cutting machine to form the shape of a mobile phone screen film and positioning holes;

[0027] Figure 6 is Figure 5 an enlarged view of part C in

[0028] Figure 7 is a schematic diagram of the protective film of the present invention after tearing off two second PET layers, and manually tearing off the waste of the first release film layer and the use layer outside the shape of the mobile phone screen film;

[0029] Figure 8 is Figure 7 an enlarged view of part D in

[0030] Reference numerals are:

[0031] First release film layer 1, use layer 2, first protective layer 3, first PET layer 4, auxiliary material layer 5, second PET layer 6, positioning hole 7. DETAILED DESCRIPTION OF THE INVENTION

[0032] The present invention will be further described in conjunction with the accompanying drawings. It should be noted in particular that the orientation terms such as upper, lower, front, back, left, and right described in the present application document are all based on Figure 1 as shown in

[0033] Example 1

[0034] As Figures 1 to 8 shown, a protective film includes a first release film layer 1, a use layer 2, a first protective layer 3, a first PET layer 4, two groups of auxiliary layers 5, and two groups of second PET layers 6.

[0035] The first release film layer 1, the use layer 2, the first protective layer 3, and the first PET layer 4 are bonded in sequence. The two groups of auxiliary layers 5 are respectively located at the upper and lower ends of the use layer 2, and both groups of auxiliary layers 5 are bonded to the first protective layer 3. The thickness of the auxiliary layer 5 is equal to the sum of the thicknesses of the first release film layer 1 and the use layer 2.

[0036] The two groups of second PET layers 6 are respectively located at the upper and lower ends of the first PET layer 4, and both groups of second PET layers 6 are bonded to the first protective layer 3. The thicknesses of the first PET layer 4 and the second PET layer 6 are equal.

[0037] Example 2

[0038] As Figures 1 to 8 shown, a method for manufacturing the protective film in Example 1 includes the following steps:

[0039] Step 1: Prepare the main material coil, tear off the thicker second release film layer on one side of the main material coil, and tear off the second protective layer on the other side of the main material coil to obtain the use layer 2. Bond the first release film layer 1 and the first protective layer 3 to the two sides of the use layer 2 respectively;

[0040] Step 2: Prepare the backing layer coil, tear off the third release film layer on the backing layer coil to obtain the PET layer coil, and bond the PET layer coil to the first protective layer 3;

[0041] Step 3: Dispose the two groups of auxiliary layers 5 at the upper and lower ends of the use layer 2 respectively, and bond both groups of auxiliary layers 5 to the first protective layer 3 to obtain the finished product coil;

[0042] Step 4: Cut the finished product coil into a square shape through the upper die, and at the same time cut the PET layer coil into the first PET layer 4 and the two groups of second PET layers 6 through the lower die, and make the two groups of second PET layers 6 be respectively located at the upper and lower ends of the first PET layer 4 to obtain the protective film.

[0043] Example 3

[0044] As Figures 1 to 8The usage method of the protective film in Embodiment 1 as shown includes the following steps:

[0045] Step 1: Place the protective film into a cutting machine. According to the requirements of the mobile phone screen, cut out the shape of the mobile phone screen sticker in the middle area of the first release film layer 1 on the protective film, and cut out positioning holes 7 in each of the two auxiliary material layers 5. Cut out two groups of positioning holes 7 in each auxiliary material layer 5 area, and make the positioning holes 7 located in the overlapping area of the auxiliary material layer 5 and the second PET layer 6. The cutting depth is equal to the sum of the thicknesses of the first release film layer 1, the use layer 2, and the first protective layer 3.

[0046] Step 2: Tear off the two second PET layers 6 to expose the positioning holes 7.

[0047] Step 3: Manually tear off the waste of the first release film layer 1 and the use layer 2 outside the shape of the mobile phone screen sticker, and discharge the waste of the first release film layer 1 and the use layer 2.

[0048] Step 4: Manually tear off the first release film layer 1 at the shape of the mobile phone screen sticker.

[0049] Step 5: Fix the mobile phone on a positioning sticker fixture, clean the mobile phone screen, place the use layer 2 of the protective film downward, and pass the corresponding positioning holes 7 through the positioning posts of the positioning sticker fixture.

[0050] Step 6: Use a film-pushing scraper to push the film and stick the use layer 2 on the mobile phone screen.

[0051] Step 7: Tear off the first protective layer 3 and the first PET layer 4, so that the use layer 2 is pasted on the mobile phone screen to complete the film sticking.

[0052] By setting two groups of auxiliary material layers 5, the present invention reduces the waste of the use layer 2, thereby greatly reducing the production cost; by cutting the PET layer roll into the first PET layer 4 and two groups of second PET layers 6, and making the two groups of second PET layers 6 located at the upper and lower ends of the first PET layer 4 respectively, it is convenient for people to tear off the second PET layer 6 to expose the positioning holes 7, facilitating more accurate positioning. Compared with the traditional technology that can only be manually aligned, the present invention achieves the purpose of more accurate alignment and film sticking; in addition, the film sticking method adopted by the present invention is positioning film sticking, without cutting off the release layer of the use layer 2 and pushing from the middle to both sides, thus avoiding obvious imprints left on the adhesive surface of the use layer 2 at the cut-off position, and further improving the aesthetic degree of the film sticking.

[0053] The above-disclosed is only a preferred embodiment of the present invention, and it cannot be used to limit the scope of the patent protection of the present invention. Therefore, equivalent changes made in accordance with the scope of the patent application of the present invention still fall within the scope covered by the present invention. The above does not impose any limitation on the technical scope of the present invention. Any modifications, equivalent changes, and decorations made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solutions of the present invention.

Claims

1. A protective film, characterized in that: It includes a first release film layer, a use layer, a first protective layer, a first PET layer, two groups of auxiliary material layers and two groups of second PET layers. The first release film layer, the use layer, the first protective layer and the first PET layer are adhesively bonded in sequence. The two groups of auxiliary material layers are respectively located at the upper and lower ends of the use layer, and both groups of auxiliary material layers are adhesively bonded to the first protective layer. The thickness of the auxiliary material layer is equal to the sum of the thicknesses of the first release film layer and the use layer. The two groups of second PET layers are respectively located at the upper and lower ends of the first PET layer, and both groups of second PET layers are adhesively bonded to the first protective layer.

2. The protective film according to claim 1, wherein: The first PET layer and the second PET layer have the same thickness.

3. A method for manufacturing a protective film as described in claim 1 or 2, characterized in that: It includes the following steps: Step 1: Prepare the main material roll. Tear off the thicker second release film layer on one side of the main material roll and tear off the second protective layer on the other side of the main material roll to obtain the use layer. Adhesively bond the first release film layer and the first protective layer to the two sides of the use layer respectively. Step 2: Prepare the backing layer roll. Tear off the third release film layer on the backing layer roll to obtain the PET layer roll, and bond the PET layer roll to the first protective layer. Step 3: Dispose the two groups of auxiliary material layers at the upper and lower ends of the use layer respectively, and adhesively bond both groups of auxiliary material layers to the first protective layer to obtain the finished product roll. Step 4: Cut the finished product roll into a square shape through the upper die, and at the same time cut the PET layer roll into a first PET layer and two groups of second PET layers through the lower die, and make the two groups of second PET layers be respectively located at the upper and lower ends of the first PET layer to obtain the protective film.

4. A method for using the protective film according to claim 1 or 2, characterized in that: It includes the following steps: Step 1: Put the protective film into the cutting machine. According to the requirements of the mobile phone screen, cut out the shape of the mobile phone screen sticker in the middle area of the first release film layer on the protective film, and cut out positioning holes in the two groups of auxiliary material layers respectively, and make the positioning holes located in the overlapping area of the auxiliary material layer and the second PET layer. The cutting depth is equal to the sum of the thicknesses of the first release film layer, the use layer and the first protective layer. Step 2: Tear off the two groups of second PET layers to expose the positioning holes. Step 3: Manually tear off the waste materials of the first release film layer and the use layer outside the shape of the mobile phone screen sticker to discharge the waste of the first release film layer and the use layer. Step 4: Manually tear off the first release film layer at the position of the mobile phone screen sticker shape. Step 5: Fix the mobile phone on the positioning sticker fixture, clean the mobile phone screen, place the use layer of the protective film downward, and pass the corresponding positioning holes through the positioning posts of the positioning sticker fixture. Step 6: Use a film-pushing scraper to push the film and stick the use layer on the mobile phone screen. Step 7: Tear off the first protective layer and the first PET layer to make the use layer stick on the mobile phone screen, and complete the film sticking.

5. The method for using the protective film according to claim 4, characterized in that: In Step 1, two groups of positioning holes are cut out in each group of auxiliary material layer areas.

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