Protective film, curved structure, and method for attaching a protective film

Abstract

The present application provides a protective film, which comprises a release layer and a protective layer attached to the release layer. The protective layer comprises a strip extending in a spiral shape. The present application also provides a curved structure having a curved surface, wherein the curved surface is attached with a protective layer, and the protective layer comprises a strip extending in a spiral shape. The present application also provides a method for attaching a protective film.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of protective film, in particular to a protective film, a curved surface structure and a protective film attaching method. BACKGROUND

[0002] Currently, when attaching a protective film to the surface of a product, there are problems such as bubbles and wrinkles. In addition, when the protective film is torn off on the product in the subsequent process, there is a problem that residual film is attached to the product. SUMMARY

[0003] An embodiment of the present application provides a protective film, comprising:

[0004] a release layer; and

[0005] a protective layer attached to the release layer;

[0006] The protective layer comprises a strip extending in a spiral shape.

[0007] Since the protective layer of the protective film comprises a strip extending in a spiral shape, when it is attached to the surface of a product, the area in contact with the product is small, thereby ensuring smooth attachment without wrinkles and bubbles. In addition, the strip of the protective layer extends in a spiral shape, so that when the protective layer is torn off on the product in the subsequent process, the protective layer can be pulled from one end of the strip and then stretched in a spiral shape to be torn off, without the presence of residual film.

[0008] An embodiment of the present application also provides a curved surface structure having a curved surface, wherein the curved surface is attached with a protective layer, and the protective layer comprises a strip extending in a spiral shape.

[0009] Since the protective layer on the curved surface structure comprises a strip extending in a spiral shape, when the protective layer is torn off on the product in the subsequent process, the protective layer can be pulled from one end of the strip and then stretched in a spiral shape to be torn off, without the presence of residual film.

[0010] An embodiment of the present application also provides a protective film attaching method, comprising:

[0011] providing the protective film described above;

[0012] stripping the release layer from the protective layer; and

[0013] attaching the side of the protective layer stripped from the release layer to a product to be attached.

[0014] Due to the strip-shaped protection layer extending in a spiral shape, the protection layer can be attached flat to the surface of the object to be attached without wrinkles and bubbles. In addition, due to the strip-shaped protection layer extending in a spiral shape, when the protection layer is pulled off from the object to be attached in the subsequent process, the protection layer can be pulled off from one end of the strip-shaped protection layer and then pulled off in a spiral shape, so that there is no residual film. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A plan view of a protection film according to a first embodiment of the present application.

[0016] Figure 2 A plan view of a first release film according to the present application. Figure 1

[0017] A plan view of a second release film according to the present application. Figure 3 Figure 1 A plan view of a protection layer according to a second embodiment of the present application.

[0018] Figure 4 A plan view of a protection layer according to a third embodiment of the present application.

[0019] Figure 5 A plan view of a protection layer according to a fourth embodiment of the present application.

[0020] Figure 6 A plan view of a protection layer according to a fifth embodiment of the present application.

[0021] Figure 7 A plan view of a protection layer according to a sixth embodiment of the present application.

[0022] Figure 8 A plan view of a protection layer according to a seventh embodiment of the present application.

[0023] Figure 9 A plan view of a protection layer according to an eighth embodiment of the present application.

[0024] Figure 10 A perspective view of a curved structure according to an embodiment of the present application.

[0025] Figure 11 A flowchart of a protection film attachment method according to an embodiment of the present application.

[0026] Figure 12 MAIN ELEMENT SYMBOL EXPLANATION

[0027] PROTECTION FILM 10

[0028] PROTECTION FILM 10

[0029] RELEASE LAYER 11 ​

[0030] First release film 12

[0031] First main body portion 121

[0032] First pulling head 122

[0033] Second release film 13

[0034] Second main body portion 131

[0035] Second pulling head 132

[0036] Protective layer 14

[0037] Tear-off head 142

[0038] Positioning hole 15

[0039] Curved surface structure 20

[0040] Curved surface 21

[0041] The following detailed description will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0042] In order to enable persons skilled in the art to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application will be described in detail below in conjunction with the drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0043] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application. The described embodiments are only some of the embodiments of the present application, and are not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0045] Figure 1 A planar schematic view of a protective film 10 according to a first embodiment of the present application is shown in FIG. 1. As shown in FIG. 1, the protective film 10 includes a release layer 11 and a protective layer 14 attached to the release layer 11. The protective layer 14 includes a strip extending in a spiral shape, and the strip extending in the spiral shape extends outwardly from the center. Figure 1

[0046] ​Since the protective layer 14 is cut into strips, the area in contact with the product is small when the protective layer 14 is attached to the surface of the product, thereby ensuring smooth attachment without wrinkles and bubbles. In addition, the strips of the protective layer 14 extend in a spiral shape, so that when the protective layer 14 is pulled off the product in subsequent processes, the protective layer 14 can be pulled from one end of the strip (the tear head 142) and then stretched in a spiral shape and pulled off, without leaving residual film.

[0047] Figure 1 In some embodiments, the protective layer 14 includes a strip extending in a spiral shape, and one end of the strip on the outside is defined as the tear head 142, which is used to start the tear when the protective layer 14 is pulled off the product. In other embodiments, the protective layer 14 can include multiple strips extending in a spiral shape, and one end of each strip on the outside is defined as the tear head 142. That is, the protective layer 14 can include multiple tear heads 142.

[0048] In one embodiment, the protective layer 14 is cut into strips extending in a spiral shape by die cutting. To ensure accurate cutting, a round knife is used for die cutting. In one embodiment, the strips of the protective layer 14 extending in a spiral shape are completely disconnected. Figure 1 In some embodiments, the cutting lines between the strips diverge from the center and extend to the periphery, and although the strips are disconnected, the strips are closely arranged without obvious gaps. In other embodiments, the protective layer 14 is die cut into strips extending in a spiral shape by a perforation line, that is, the strips of the protective layer 14 are not completely disconnected but have some easily broken connection points. The perforation line is a line segment with multiple through holes. The size of the easily broken connection points is as small as possible to facilitate the subsequent removal of the protective layer 14 from the product.

[0049] The protective film 10 only includes two layers of structure of the release layer 11 and the protective layer 14, one side of the protective layer 14 is attached to the release layer 11, and the other side does not need to be attached to another release layer 11. When the protective film 10 is attached, the protective layer 14 is directly peeled off from the release layer 11 and attached to the product. Compared with the three-layer structure in which the protective layer is sandwiched between two release layers, the protective film 10 reduces the cost of raw materials of the release film, shortens the operation time during the attachment process, and improves the attachment efficiency.

[0050] In one embodiment, the area of the release layer 11 not covered by the protective layer 14 is provided with positioning holes 15 for cooperating with positioning posts on an assembling jig (not shown). During the process of attaching the protective film 10, the object to be attached is placed in a jig, and then the protective film 10 is fixed in another assembling jig opposite to the jig in which the object to be attached is placed through the positioning holes 15. Then, the release layer 11 and the protective layer 14 are peeled off, and then a semi-automatic machine is used to attach the surface of the protective layer 14 peeled off from the release layer 11 to the surface of the object to be attached.

[0051] In one embodiment, the positioning holes 15 can be round holes, oval holes, etc., and the shape thereof is not limited herein. In addition, Figure 1 In one embodiment, the positioning holes 15 are arranged at the edge positions of the release layer 11, and the number thereof is three. In other embodiments, the number of the positioning holes 15 is not limited.

[0052] The adhesive glue between the protective layer 14 and the release layer 11, Figure 1 In one embodiment, the entire surface of the protective layer 14 is attached to the release layer 11, so that the adhesive glue can be well protected. When the release layer 11 is peeled off in the protective film 10, the adhesive glue remains on the protective layer 14, so that the protective layer 14 can be attached to the surface of the object to be attached through the adhesive glue.

[0053] In one embodiment, the material of the protective layer 14 can be polycarbonate, polymethyl methacrylate, polyethylene, polyvinyl chloride, or polyethylene terephthalate. The above-mentioned materials have stable chemical properties and high transparency, so that the attachment of the protective layer 14 to the surface of the object to be attached (such as a lens or a curved glass) will not affect the optical properties of the product, etc.

[0054] In one embodiment, the release layer 11 includes a first release film 12 and a second release film 13 spliced together. A part of the protective layer 14 is attached to the first release film 12, and another part is attached to the second release film 13.

[0055] As shown in the drawings, Figure 2 The first release film 12 includes a first main body part 121 and a first pulling head 122 extended from the first main body part 121. A part of the protective layer 14 is attached to the first main body part 121, and the first pulling head 122 is not attached to the protective layer 14, which is used as a starting point when the first release film 12 and the protective layer 14 are peeled off. When the first release film 12 and the protective layer 14 need to be peeled off, the first pulling head 122 is pulled up, the first release film 12 is lifted, and then the first main body part 121 and the protective layer 14 are separated. Figure 2 In one embodiment, the first release film 12 is substantially in the shape of a "T".

[0056] AsFigure 3 As shown, the second release film 13 comprises a second main body 131 and a second pull head 132 extended from the second main body 131. Similarly, a portion of the protective layer 14 is attached to the second main body 131, and the second pull head 132 is not attached to the protective layer 14, which is used as a starting point when peeling the second release film 13 and the protective layer 14. When it is necessary to peel the second release film 13 and the protective layer 14, only the second pull head 132 needs to be pulled up, and then the second release film 13 can be lifted, and the second main body 131 and the protective layer 14 are separated. Figure 3 In some embodiments, the second release film 13 is substantially in the shape of a "T".

[0057] Please continue to refer to Figure 1 , the first main body 121 and the second main body 131 are spliced to be substantially rectangular, and the projection of the first main body 121 and the projection of the second main body 131 do not overlap along the thickness direction of the protective film 10, and the projection of the first main body 121 and the projection of the second main body 131 completely cover the protective layer 14. In addition, the first pull head 122 extends towards the second release film 13, and the second pull head 132 extends towards the first release film 12. Along the thickness direction of the protective film 10, the projection of the first pull head 122 falls on the second main body 131, and the projection of the second pull head 132 falls on the first main body 121.

[0058] Figure 1 In some embodiments, the first pull head 122 extends from the middle of the first main body 121, and the second pull head 132 extends from the middle of the second main body 131. In this way, when the first release film 12 or the second release film 13 is peeled from the protective layer 14, the force received is more uniform.

[0059] Figure 1 In some embodiments, along the thickness direction of the protective film 10, the projection of the first pull head 122 and the projection of the second pull head 132 do not overlap. That is, the first pull head 122 and the second pull head 132 are staggered. Along the thickness direction of the protective film 10, corresponding to the position of the first pull head 122, from top to bottom, the first pull head 122, the first main body 121 of the first release film 12 and the protective layer 14 are arranged in sequence; corresponding to the position of the second pull head 132, from top to bottom, the second pull head 132, the second main body 131 of the second release film 13 and the protective layer 14 are arranged in sequence.

[0060] Figure 1Among them, the first drawing head 122 and the second drawing head 132 are arranged adjacent to each other, both are rectangular strips, and the number of each is 1. In other embodiments, the first drawing head 122 and the second drawing head 132 may also be arranged at intervals, the shape is not limited, and the number is not limited either.

[0061] Figure 1 Among them, the protective layer 14 is generally circular as a whole, and it is adapted to the surface of the object to be adhered. In other embodiments, the overall shape of the protective layer 14 is not limited. For example, Figure 4 Among them, the protective layer 14 is generally rectangular as a whole.

[0062] Figure 1 Among them, the protective layer 14 includes a strip extending in a spiral shape. That is, in the subsequent manufacturing process, if the protective layer 14 is torn off from the product, only one end of the strip needs to be lifted to peel off the protective layer 14 from the product, and the operation is simple and convenient. In other embodiments, the protective layer 14 may also be die-cut into multiple strips extending in a spiral shape. For example, Figure 5 and Figure 6 Among them, the protective layer 14 includes two strips extending in a spiral shape. That is, in the subsequent manufacturing process, if the protective layer 14 is torn off from the product, the ends (tearing heads 142) of the two strips need to be lifted separately to peel off the protective layer 14 from the product.

[0063] Among them, Figure 5 Among them, the protective layer 14 is die-cut into a shape similar to "mosquito coil incense". Figure 6 Among them, the protective layer 14 is die-cut into a shape similar to a "square with a hole in the middle". Since the protective layer 14 is die-cut into strips, when it is attached to the surface of the product, especially on the curved surface of the product, the contact area with the curved surface becomes smaller. Therefore, it can ensure flat attachment without generating wrinkles and bubbles. In addition, due to the spiral design of the protective layer 14, when it is pulled and torn off from the product, it can be torn off in a spiral shape along the dividing line of the protective layer 14 without the existence of residual film.

[0064] Figure 1 、 Figure 4 、 Figure 5 and Figure 6 In the protective layer 14 shown, the width of the strip from the center to the periphery is basically the same. That is, the width of the strip basically does not change with its curvature.

[0065] Figure 7 This is a schematic plan view of the protective layer 14 of the fifth embodiment of the present invention. As Figure 7 shown, the protective layer 14 includes multiple strips extending in a spiral shape, and each strip includes a tearing head 142. The width of each strip gradually increases from the center to the periphery. That is, the width of each strip increases as its curvature becomes smaller.

[0066] Figure 8 A plan view of the protective layer 14 of the sixth embodiment of the present application is shown in FIG. 6. As shown, the protective layer 14 comprises a spirally extending strip, the width of which gradually increases from the center to the periphery, i.e. the width of the strip increases as the curvature thereof decreases. In one embodiment, the width of the strip is largest at the tear-off head 142 and smaller near the center. In another embodiment, the width of the strip gradually decreases from the center to the periphery, i.e. the width of the strip decreases as the curvature thereof decreases. In this embodiment, the width of the strip is smallest at the tear-off head 142 and larger near the center. Figure 8

[0067] A plan view of the protective layer 14 of the seventh embodiment of the present application is shown in FIG. 7. As shown, the protective layer 14 comprises two spirally extending strips, which are concentric spirals, the width of each strip is substantially constant from the center to the periphery, and the widths of the two strips are different. In another embodiment, the protective layer 14 can comprise a plurality of spirally extending strips, which are concentric spirals, and the number of strips is not limited to two, the width of each strip is substantially constant from the center to the tear-off head 142, and the widths of the strips can be different or the same. Figure 9 Figure 9 A plan view of the protective layer 14 of the eighth embodiment of the present application is shown in FIG. 8. As shown, the protective layer 14 comprises two spirally extending strips, each strip diverges from the center, and the width of each strip at the same turn is not constant.

[0068] Figure 10 Figure 10 In one embodiment, the width of each strip in some turns is from narrow to wide to narrow. Figure 10

[0069] The protective film 10 described above provided by the embodiments of the present application can be applied to a curved structure 20. As shown, the curved structure 20 has a curved surface 21. Figure 11 In one embodiment, the protective layer 14 is not shown. When the protective film 10 is applied to the curved structure 20, the release layer 11 is removed, and the side of the protective layer 14 attached to the release layer 11 is attached to the curved surface 21 of the curved structure 20. Since the protective layer 14 comprises a spirally extending strip, on the one hand, the contact area thereof with the curved surface is small, thus ensuring smooth attachment without wrinkles and bubbles. On the other hand, due to the spiral design of the protective layer 14, if the protective layer 14 needs to be removed from the curved structure 20 in subsequent processes, the protective layer 14 can be spirally torn along the division line, and there is no residual film. Figure 11

[0070] ​​​​In an embodiment, the curved structure 20 comprises a lens, and the lens has the curved surface 21. Since the protective layer 14 is attached to the curved structure 20 without wrinkles and bubbles, the lens can be well protected, thereby avoiding the lens from being scratched or preventing foreign matters such as dust or suspended particles from entering between the protective layer 14 and the lens, and affecting the optical properties of the lens.

[0071] In an embodiment, the curved surface 21 can also be an irregular curved surface. The curved structure 20 can also be a cover glass in a touch panel, for example, and the cover glass has the curved surface 21. Of course, the protective film 10 can also be applied to a flat structure, for example, attached to a flat cover glass in a touch panel.

[0072] As shown in Figure 12 The present embodiment also provides an attaching method of the protective film 10, which comprises the following steps.

[0073] Step S1: providing the protective film 10 described above.

[0074] Step S2: peeling the release layer 11 from the protective layer 14.

[0075] Step S3: attaching the side of the protective layer 14 peeled from the release layer 11 to a to-be-attached object.

[0076] In an embodiment, step S1 comprises providing an assembling jig (not shown in the figure) provided with positioning columns. The positioning holes 15 provided on the protective film 10 are aligned with the positioning columns one by one and are sleeved on the positioning columns, so that the protective film 10 is fixed to the assembling jig.

[0077] In an embodiment, the release layer 11 is provided with a first pulling part and a second pulling part. After the protective film 10 is fixed to the assembling jig, in step S2, the first release film 12 and the protective layer 14 are peeled by pulling the first pulling part, and the second release film 13 and the protective layer 14 are peeled by pulling the second pulling part. In addition, after the first release film 12, the second release film 13 and the protective layer 14 are peeled, the adhesive between the release layer 11 and the protective layer 14 remains on the protective layer 14 and will not be taken away by the release layer 11.

[0078] In an embodiment, step S3 further comprises the steps of cleaning the to-be-attached object and the jig with a dust-free cloth dipped with alcohol, and then placing the to-be-attached object in the jig. In addition, in step S3, a semi-automatic machine can be used to attach the protective layer 14 to the to-be-attached object.

[0079] In one embodiment, the object to be attached is a curved structure 20 having a curved surface 21, and the protective layer 14 is attached to the curved surface 21. The curved structure 20 can include a lens having the curved surface 21.

[0080] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalent replaced, without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A protective film, characterized in that, include: Release layer; as well as A protective layer is attached to the release layer; The protective layer includes spirally extending strips that are in a plane and extend outward from the center.

2. The protective film as described in claim 1, characterized in that, The release layer includes a first release film and a second release film; The first release film includes a first body portion and a first pull head extending from the first body portion, the first pull head not being attached to the protective layer for initiating the peeling of the first release film and the protective layer; The second release film includes a second body portion and a second pull head extending from the second body portion, the second pull head not being attached to the protective layer for initiating the peeling of the second release film and the protective layer; A portion of the protective layer is attached to the first main body portion, and another portion is attached to the second main body portion; Along the thickness direction of the protective film, the projections of the first main body and the second main body do not overlap, and the projections of the first main body and the second main body completely cover the protective layer.

3. The protective film as described in claim 2, characterized in that, The first pull head extends toward the second release film, and the second pull head extends toward the first release film; Along the thickness direction of the protective film, the projection of the first pulling head falls onto the second main body, and the projection of the second pulling head falls onto the first main body.

4. The protective film as described in claim 3, characterized in that, The first pulling head extends from the middle of the first main body, and the second pulling head extends from the middle of the second main body; Furthermore, along the thickness direction of the protective film, the projections of the first pulling head and the second pulling head do not overlap.

5. The protective film as described in claim 1, characterized in that, The area of ​​the release layer not covered by the protective layer is provided with positioning holes for cooperating with positioning posts on the assembly fixture.

6. A curved surface structure having a curved surface, characterized in that, A protective layer is attached to the curved surface, the protective layer comprising spirally extending strips that extend outward from the center.

7. The curved surface structure as described in claim 6, characterized in that, The curved structure includes a lens having the curved surface.

8. A method for applying a protective film, characterized in that, include: Provide a protective film as described in any one of claims 1 to 5; This causes the release layer to peel off from the protective layer; as well as The protective layer is attached to the side of the release layer that is separated from the release layer onto a substrate to be bonded.

9. The protective film application method as described in claim 8, characterized in that, The material to be bonded is a curved structure with a curved surface, and the protective layer is attached to the curved surface.

10. The protective film application method as described in claim 9, characterized in that, The curved structure includes a lens having the curved surface.

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