Shielding film and glass

Abstract

The utility model provides a shielding film and glass, and relates to the technical field of glass manufacturing. The shielding film comprises a base film layer, the base film layer comprises a non-shielding area and a shielding area, the non-shielding area and the shielding area are coplanar and jointly form a first surface used for being attached to a to-be-shielded part, and a first target edge of the non-shielding area is connected with a second target edge of the shielding area through a pre-fracture part; the non-shielding area is separated from the shielding area under the external acting force; the isolating membrane is attached to the first surface and covers the non-shielding area and the shielding area; wherein the connection strength between the shielding area and the isolating membrane is smaller than the connection strength between the first target edge and the second target edge. According to the shielding film, the non-shielding area can be separated from the shielding area through external acting force, the clean part of the surface of the glass is exposed, the area, needing to be shielded, of the glass is still kept shielded, the shielding film plays a role in protecting the surface of the glass, meanwhile, the step of washing the glass is omitted, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of glass manufacturing, and in particular, to a shielding film and a glass. BACKGROUND

[0002] In recent years, the Chinese automobile industry has experienced rapid development, and more and more families own one or more cars, which has driven the rapid expansion of the vehicle display glass market and intensified market competition. In order to cope with the growth of market demand, improving production efficiency and meeting customer order quantity have become important tasks for enterprises. Under this background, the existing cover plate glass shielding technology is under pressure to upgrade.

[0003] At present, the shielding of cover plate glass mainly adopts the method of customizing shielding according to the size and shape of the required shielding part. However, this method has several deficiencies that need to be solved: first, the shielding film is prone to falling off or generating bubbles after being washed; second, the product surface is prone to foreign matter pollution or dirt during transportation after cleaning; in addition, the long cleaning time not only reduces production efficiency, but also increases the risk of product contamination and scratching during the cleaning process.

[0004] Therefore, how to solve the above problems is a problem that needs to be solved at present. CONTENT OF THE INVENTION

[0005] To solve the above technical problems, the present disclosure provides a shielding film, comprising: a base film layer, comprising a non-shielding area and a shielding area, the non-shielding area and the shielding area are coplanar and together form a first surface for attaching a to-be-shielded part, a first target edge of the non-shielding area is connected to a second target edge of the shielding area through a pre-fracture part, so that the non-shielding area is separated from the shielding area under external force; an isolation film attached to the first surface and covering the non-shielding area and the shielding area; wherein the connection strength between the shielding area and the isolation film is less than the connection strength of the first target edge and the second target edge.

[0006] In some embodiments, the non-shielding area surrounds the shielding area, and the non-shielding area covers the to-be-cleaned surface of the to-be-shielded part, and the shielding area covers the to-be-shielded surface of the to-be-shielded part.

[0007] In some embodiments, the connection strength between the shielding area and the to-be-shielded surface is greater than the connection strength of the first target edge and the second target edge.

[0008] In some embodiments, the base film layer comprises: a use film having a first connecting surface and a second connecting surface along a thickness direction thereof, the use film comprising a first region and a second region, and a peripheral edge of the first region being connected to a peripheral edge of the second region by a pre-breaking portion; a protective film stacked with the use film and connected to the first connecting surface of the use film, the protective film comprising a third region and a fourth region; and an isolation film attached to and covering the second connecting surface; wherein the first region and the third region are stacked to form a non-shielding region, and the second region and the fourth region are stacked to form a shielding region.

[0009] In some embodiments, an area of the second region is greater than an area of the fourth region.

[0010] In some embodiments, an edge of the isolation film is at least partially misaligned with an outer edge of the base film layer.

[0011] In some embodiments, a thickness of the second region is greater than a thickness of the first region along a direction from the first connecting surface to the second connecting surface.

[0012] In some embodiments, the base film layer has a main region and an edge region surrounding the main region, the main region has a first thickness, and the edge region has a second thickness, and the second thickness is less than the first thickness.

[0013] In some embodiments, further comprising: a first positioning portion provided in the edge region; and a positioning frame having a receiving groove for receiving the to-be-shielded member to expose a to-be-cleaned surface and a to-be-shielded surface of the to-be-shielded member, and the positioning frame is provided with a second positioning portion corresponding to the first positioning portion.

[0014] The second aspect of the present application provides a glass comprising the shielding film as above.

[0015] Through the above technical solution, the shielding film and the glass provided by the present disclosure can expose a first surface formed by the non-shielding region and the shielding region simultaneously when the isolation film is torn off, and the non-shielding region and the shielding region of the base film layer can cover the entire glass, because the connection strength between the shielding region and the isolation film is less than the connection strength between the first target edge and the second target edge. After transportation, the shielding film does not need to be washed with water and then attached to the glass. Only the isolation film needs to be torn off to expose the clean first surface. The non-shielding region and the shielding region of the shielding film can cover the entire glass surface in a region-by-region manner. After the glass is transported to the target position, the non-shielding region can be separated from the shielding region by an external force to expose the clean part of the glass surface, and the region of the glass that needs to be shielded can still be kept shielded. The shielding film plays a protective role for the surface of the glass, and the washing step of the glass is omitted, thereby improving the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and for those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

[0017] Figure 1 is a top view of a shielding film disclosed by an embodiment of the present disclosure;

[0018] Figure 2 is a sectional view of a shielding film disclosed by an embodiment of the present disclosure;

[0019] Figure 3 is a sectional view of another shielding film disclosed by an embodiment of the present disclosure;

[0020] Figure 4 is Figure 1 a local enlarged view of A;

[0021] Figure 5 is a structural schematic view of a positioning frame of a shielding film disclosed by an embodiment of the present disclosure.

[0022] Explanation of reference signs:

[0023] 1, base film layer; 11, non-shielding area; 12, shielding area; 5, use film; 51, first area; 52, second area; 53, first connecting surface; 54, second connecting surface; 6, protective film; 61, third area; 62, fourth area; 2, pre-fracture part; 3, isolation film; 4, to-be-shielded piece; 41, to-be-cleaned surface; 42, to-be-shielded surface; 7, first positioning part; 8, positioning frame; 81, accommodating groove; 9, second positioning part. DETAILED DESCRIPTION

[0024] The embodiments of the present disclosure will be further described in detail below with reference to the drawings and embodiments. The detailed description and drawings of the following embodiments are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure, and the present disclosure can be implemented in many different forms, and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0025] The present disclosure provides these embodiments in order to make the present disclosure thorough and complete, and fully express the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions and values set forth in these embodiments should be interpreted as merely exemplary, and not as a limitation.

[0026] It should be noted that in the description of the present disclosure, unless otherwise specified, the meaning of "a plurality of" is greater than or equal to two; The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like is only for the purpose of facilitating the description of the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation to the present disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] In addition, "first", "second", and similar words used in the present disclosure do not indicate any order, number or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. "Include" or "contain" and similar words mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements.

[0028] It should also be noted that in the description of the present disclosure, unless otherwise specified and limited, the terms "mount", "connect", "connect" should be understood broadly, for example, it can be a fixed connection, or it can be a detachable connection, or an integral connection; It can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances. When it is described that a specific device is located between the first device and the second device, there can be an intermediate device between the specific device and the first device or the second device, or there can be no intermediate device.

[0029] All terms used in the present disclosure have the same meaning as understood by those skilled in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted to have meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or excessively formalized sense, unless specifically defined here.

[0030] Techniques, methods, and equipment known to those skilled in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and equipment should be considered part of the specification.

[0031] The inventors found that before coating the cover plate glass, a shielding film needs to be attached to the non-coating area. However, after the shielding film is attached, it is easy to fall off and form bubbles during the water washing process, and at the same time, it also increases the risk of glass contamination and scratching during the cleaning process. In addition, the longer cleaning time also affects the overall production efficiency and capacity.

[0032] To solve the above-mentioned technical problems, this disclosure provides a shielding film, comprising: a base film layer 1, which includes a non-shielding region 11 and a shielding region 12, the non-shielding region 11 and the shielding region 12 being coplanar and jointly forming a first surface for attaching a component 4 to be shielded, the first target edge of the non-shielding region 11 being connected to the second target edge of the shielding region 12 through a pre-fracture portion 2, so that the non-shielding region 11 is separated from the shielding region 12 under an external force; and an isolation film 3, which is attached to the first surface and covers the non-shielding region 11 and the shielding region 12; wherein the connection strength between the shielding region 12 and the isolation film 3 is less than the connection strength between the first target edge and the second target edge.

[0033] Specifically, such as Figures 1-3 As shown, the component 4 to be shielded here includes, but is not limited to, mobile phone cover glass, automotive glass, display panel, etc. The base film layer 1 includes a non-shielded area 11 and a shielded area 12. The areas of the non-shielded area 11 and the shielded area 12 can be the same or different. The non-shielded area 11 can surround the shielded area 12, or the non-shielded area 11 and the shielded area 12 can be arranged side by side, or the shielded area 12 can surround the non-shielded area 11. The shapes of the non-shielded area 11 and the shielded area 12 can be arbitrary, such as rectangular, square, or circular. The base film layer 1 can be a PET (polyethylene terephthalate) protective film 6, a PE (polyethylene) protective film 6, etc. The non-shielded area 11 and the shielded area 12 together form a continuous, flat surface, i.e., the first surface, which is the surface that directly contacts the component 4 to be shielded. The pre-fracture portion 2 is a weakened area between the unshielded area 11 and the shielded area 12, which can be achieved through the following structures: The pre-fracture portion includes multiple micro-holes at the connection between the unshielded area 11 and the shielded area 12. These holes can be circular, elliptical, or other shapes, reducing the connection strength by thinning the material, making it easier to tear; or the pre-fracture portion 2 includes etched lines set in the unshielded area 11 and the shielded area 12. These etched lines can be straight, curved, or wavy, reducing the connection strength by thinning the material, making it easier to tear; or the pre-fracture portion 2 has a grid-like structure, reducing the connection strength by thinning the material at the intersections or lines of the grid. This structure not only provides sufficient strength to maintain the integrity of the shielding film but also allows for easy tearing when needed. The release film 3 can be PET (polyethylene terephthalate), and the area of ​​the release film 3 is greater than or equal to the total area of ​​the unshielded area 11 and the shielded area 12. The release film 3 can be attached to the first surface by low-tack adhesive, release agent, electrostatic adsorption, etc.

[0034] In order to expose the complete first surface when the release film 3 is torn off, the non-occlusion area 11 and the occlusion area 12 can be separated from the release film 3. The connection strength between the occlusion area 12 and the release film 3 is less than the connection strength between the first target edge and the second target edge. A low-adhesion coating can be applied to the inside of the release film 3 corresponding to the occlusion area 12 by spraying, roller coating, printing or other methods. When the release film 3 is torn off, the low-adhesion coating of the occlusion area 12 significantly reduces the adhesion between the occlusion area 12 and the release film 3, so that the occlusion area 12 is easily separated from the release film 3. Alternatively, in order to prevent the occlusion area 12 or the non-occlusion area 11 from being left on the release film 3 when the release film 3 is torn off, a layer of adhesive-free film can be additionally provided on the side of the release film 3 corresponding to the occlusion area 12 and the non-occlusion area 11, so as to isolate the occlusion area 12 and the release film 3.

[0035] The occlusion film provided by the present disclosure can expose the first surface formed by the non-occlusion area 11 and the occlusion area 12 simultaneously when the release film 3 is torn off, because the connection strength between the occlusion area 12 and the release film 3 is less than the connection strength between the first target edge and the second target edge. The non-occlusion area 11 and the occlusion area 12 of the base film layer 1 can cover the entire glass. After the occlusion film is transported, it does not need to be washed and attached to the glass again. It only needs to tear off the release film 3 to expose the clean first surface. The non-occlusion area 11 and the occlusion area 12 of the occlusion film can cover the entire glass surface in a region-by-region manner. After the glass is transported to the target position, the non-occlusion area 11 can be separated from the occlusion area 12 by external force to expose the clean part of the glass surface, and the area of the glass that needs to be covered can still be covered. The occlusion film protects the surface of the glass and omits the washing step of the glass, thereby improving the production efficiency.

[0036] In some embodiments, the non-occlusion area 11 surrounds the occlusion area 12, and the non-occlusion area 11 covers the to-be-cleaned surface 41 of the to-be-occluded member 4, and the occlusion area 12 covers the to-be-occluded surface 42 of the to-be-occluded member 4.

[0037] Specifically, as shown in FIG. 1, the base film layer 1 is provided with a non-occlusion area 11 and an occlusion area 12. The non-occlusion area 11 and the occlusion area 12 are connected by a first target edge and a second target edge. Figure 1As shown, the shielding area 12 is circular, and the non-shielding area 11 is annular surrounding the shielding area 12, which covers the surface 41 to be cleaned of the glass to be shielded 4, and can protect the surface 41 to be cleaned from being contaminated during the transportation of the glass. The shielding area 12 covers the surface 42 to be shielded of the glass to be shielded 4, and when the glass is finished with the transportation, the non-shielding area 11 can be torn off from the glass by an external force, so as to expose the surface 41 to be cleaned which needs to be coated, and the water washing process is omitted. Since the first target edge of the non-shielding area 11 and the second target edge of the shielding area 12 are connected through the pre-fracture 2, when the non-shielding area 11 is separated from the shielding area 12, the shielding area 12 is left on the surface 42 to be shielded of the glass to continue protecting the cleanliness of the surface 42 to be shielded.

[0038] In some embodiments, the connection strength between the shielding area 12 and the surface 42 to be shielded is greater than the connection strength between the first target edge and the second target edge.

[0039] Specifically, in order to make the shielding area 12 still adhere to the surface 42 to be shielded when the non-shielding area 11 is torn, and prevent the shielding area 12 from being taken away from the glass by the non-shielding area 11, the connection strength between the shielding area 12 and the surface 42 to be shielded is greater than the connection strength between the first target edge and the second target edge. Different types of adhesives can be used in the shielding area 12 and the non-shielding area 11, such as: higher adhesion adhesives are used in the shielding area 12, such as: acrylate adhesives, rubber-based adhesives, etc., and lower adhesion adhesives are used in the non-shielding area 11, such as: low-density polyethylene (LDPE) coating, modified silicone adhesive, etc.

[0040] In some embodiments, the area of the second area 52 is greater than the area of the fourth area 62.

[0041] Specifically, the connection strength between the shielding area 12 and the surface 42 to be shielded can also be made greater than the connection strength between the first target edge and the second target edge by changing the physical structure of the shielding area 12 and the non-shielding area 11. For example: the area of the shielding area 12 is increased, that is, the contact area of the shielding area 12 with the glass to be shielded 4 is increased or a special locking structure is designed at the edge thereof to improve the bonding force with the surface 42 to be shielded, such as: a small suction cup, a wave-shaped edge, etc.

[0042] In some embodiments, the base film layer 1 includes: a working film 5 having a first connecting surface 53 and a second connecting surface 54 along its thickness direction, the working film 5 including a first region 51 and a second region 52, and the outer peripheral edge of the first region 51 and the outer peripheral edge of the second region 52 being connected by a pre-fracture portion 2; a protective film 6, which is stacked with the working film 5 and connected to the first connecting surface 53 of the working film 5, the protective film 6 including a third region 61 and a fourth region 62; and an isolation film 3, which is attached to and covers the second connecting surface 54; wherein the first region 51 and the third region 61 are stacked to form a non-shading region 11, and the second region 52 and the fourth region 62 are stacked to form a shaded region 12.

[0043] Specifically, such as Figures 2-3 As shown, the base film layer 1 includes a working film 5 and a protective film 6. The working film 5 has a first connecting surface 53 and a second connecting surface 54. The first connecting surface 53 is the side that contacts the protective film 6, and the second connecting surface 54 is the side that contacts the release film 3. The first connecting surface 53 and the second connecting surface 54 may be coated with an adhesive layer. The strength of the adhesive layer on the first connecting surface 53 and the second connecting surface 54 may be the same or different. For example, the strength of the adhesive layer on the second connecting surface 54 may be less than the strength of the adhesive layer on the first connecting surface 53, so that the release film 3 can be easily detached from the second connecting surface 54.

[0044] The membrane 5 includes a first region 51 and a second region 52, and the protective membrane 6 includes a third region 61 and a fourth region 62. The first region 51 and the second region 52 are connected by a pre-fracture portion 2, allowing them to separate under external force. The third region 61 and the fourth region 62 of the protective membrane 6 can also be a single, complete membrane. When the third region 61 and the fourth region 62 can also be a single, complete membrane, after peeling the base film layer 1 from the object to be shielded 4, the entire protective membrane 6 and the first region 51 of the membrane 5 can be peeled off from the object to be shielded 4, leaving only the second region 52 of the membrane 5. At this point, the side of the second region 52 facing away from the object to be shielded 4 is the clean side covered and protected by the protective membrane 6. When the third region 61 and the fourth region 62 can be connected through the pre-fractured part 2, after the base film layer 1 is peeled off from the object to be shielded 4, the third region 61 of the protective film 6 and the first region 51 of the use film 5 can be peeled off from the object to be shielded 4, leaving the fourth region 62 of the protective film 6 and the first region 51 of the use film 5. This increases the thickness of the film protecting the surface to be shielded 42, further preventing the surface to be shielded from being contaminated or damaged during coating or other processes.

[0045] In some embodiments, the area of ​​the second region 52 is larger than the area of ​​the fourth region 62.

[0046] Specifically, when the third region 61 and the fourth region 62 of the protective layer are connected by the pre-fracture portion 2, in order to prevent contaminants from contacting or entering the surface of the part to be shielded 4 from the pre-fracture portion 2 between the third region 61 and the fourth region 62, the area of ​​the second region 52 can be larger than the area of ​​the fourth region 62, so that the orthographic projection area of ​​the second region 52 onto the fourth region 62 covers the fourth region 62, and the outer peripheral edge of the fourth region 62 is offset from the outer peripheral edge of the second region 52.

[0047] In some embodiments, the edge of the isolation membrane 3 is at least partially offset from the outer edge of the base membrane layer 1.

[0048] Specifically, such as Figure 4 As shown, to facilitate the separation of the release liner 3 from the base film layer 1, the edge of the release liner 3 is designed to be shorter than the outer edge of the base film layer 1, or staggered in some parts. This makes it easier for the user to find the starting point when tearing the release liner 3, providing a clear gripping point for easy peeling. Alternatively, a local peeling area can be designed on one side or corner of the release liner 3. This area has lower adhesion, allowing the user to start peeling the release liner 3 from this area, making the peeling process easier.

[0049] In some embodiments, the thickness of the second region 52 is greater than the thickness of the first region 51 in the direction from the first connecting surface 53 to the second connecting surface 54.

[0050] Specifically, such as Figure 3 As shown, in order to prevent pollutant particles or sewage from depositing in the second region 52 and the fourth region 62 corresponding to the shielding surface 42, the thickness of the second region 52 can be designed to be greater than the thickness of the first region 51. The thickness of the second region 52 decreases from the center to the outer periphery, forming a slight bulge that guides pollutants and moisture to flow towards the first region 51.

[0051] In some embodiments, the base film layer 1 has a main region and an edge region surrounding the main region, the main region having a first thickness and the edge region having a second thickness, the second thickness being less than the first thickness.

[0052] Specifically, to prevent the base film layer 1 from curling, the main body region is the area of ​​the base film layer 1 primarily used to cover the component 4 to be shielded, and it has a first thickness. The main body region may include the shielding region 12 or include both the shielding region 12 and the non-shielded region 11. The edge region may be a portion of the non-shielded region 11 or an additional edge region added to the base film layer 1, and it has a second thickness. The second thickness is greater than the first thickness, which can effectively reduce the tendency of the edge region to curl, thereby improving the overall stability and performance of the membrane.

[0053] In some embodiments, the first positioning part 7 is arranged at the edge region, and the positioning frame 8 is provided with a receiving groove 81 for accommodating the to-be-shielded part 4 to expose the to-be-cleaned surface 41 and the to-be-shielded surface 42 of the to-be-shielded part 4, and the positioning frame 8 is provided with a second positioning part 9 corresponding to the first positioning part 7.

[0054] Specifically, as shown in Figure 1 and Figure 5 The edge region can be provided with the first positioning part 7, and the positioning frame 8 can have any shape, such as a circular shape, a rectangular shape, or a polygonal shape, which can be arranged according to the shape of the to-be-shielded part 4. The receiving groove 81 of the positioning frame 8 is used to accommodate the to-be-shielded part 4, wrap the to-be-shielded part 4, and expose the to-be-cleaned surface 41 and the to-be-shielded surface 42 of the to-be-shielded part 4, so as to facilitate the attachment of the base film layer 1. The positioning frame 8 is provided with the second positioning part 9, which can be arranged on both sides of the receiving groove 81 of the positioning frame 8. The first positioning part 7 can have a protruding structure, and the second positioning part 9 can have a groove structure; or the first positioning part 7 can be a hole, and the second positioning part 9 can be a guide column matched with the hole, etc. Through the cooperation of the first positioning part 7 and the second positioning part 9, the accurate positioning of the base film layer 1 is ensured, and the use effect is improved.

[0055] The second aspect of the present application provides a glass comprising the shielding film as above.

[0056] The second aspect of the present application provides a glass, which can be but is not limited to a cover glass, comprising a shielding film. The glass can omit the cleaning process step using the whole-surface shielding film process, because the glass has been cleaned once before the shielding film is attached, and the product is in a dust-free state after attachment, so that the shielding film can be directly sent to coating after attachment without cleaning process, thereby improving the production efficiency, saving labor cost, and avoiding the adverse risks such as scratching and dirt caused by cleaning, and improving the production yield. When attached, the release film 3 is first torn off. Since the connection strength between the shielding region 12 and the release film 3 is less than the connection strength between the first target edge and the second target edge, the first surface formed by the non-shielding region 11 and the shielding region 12 can be exposed at the same time when torn off, and the non-shielding region 11 and the shielding region 12 of the base film layer 1 can cover the whole glass. After the shielding film is transported, it does not need to be attached to the glass after water washing, but only needs to tear off the release film 3 to expose the clean first surface, and the non-shielding region 11 and the shielding region 12 of the shielding film can cover the whole glass surface in a region-by-region manner. After the glass is transported to the target position, the non-shielding region 11 can be separated from the shielding region 12 by external force to expose the clean part of the glass surface, and the region of the glass that needs to be shielded can still be kept shielded. The shielding film plays a protective role on the surface of the glass, and also omits the water washing step of the glass, thereby improving the production efficiency.

[0057] So far, the embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein according to the above description.

[0058] Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be replaced equivalently without departing from the scope and spirit of the present disclosure. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way.

Claims

1. A barrier film, characterized by, The barrier film comprises: a base film layer (1) comprising a non-shielding area (11) and a shielding area (12), the non-shielding area (11) and the shielding area (12) being coplanar and jointly forming a first surface for attaching a shielding object (4), a first target edge of the non-shielding area (11) being connected to a second target edge of the shielding area (12) by a pre-fracture (2) so that the non-shielding area (11) separates from the shielding area (12) under external force; an isolation film (3) attached to the first surface and covering the non-shielding area (11) and the shielding area (12); wherein the connection strength between the shielding area (12) and the isolation film (3) is less than the connection strength of the first target edge and the second target edge.

2. The barrier film according to claim 1, wherein the non-shielding area (11) surrounds the shielding area (12), and the non-shielding area (11) covers a surface to be cleaned (41) of the shielding object (4), and the shielding area (12) covers a surface to be shielded (42) of the shielding object (4).

3. The barrier film according to claim 2, wherein the connection strength between the shielding area (12) and the surface to be shielded (42) is greater than the connection strength of the first target edge and the second target edge.

4. The occlusive film of claim 1, wherein, The base film layer (1) comprises: a use film (5) having a first connecting surface (53) and a second connecting surface (54) in the thickness direction thereof, the use film (5) comprising a first area (51) and a second area (52), and the outer peripheral edge of the first area (51) being connected to the outer peripheral edge of the second area (52) by the pre-fracture (2); a protective film (6) stacked with the use film (5) and connected to the first connecting surface (53) of the use film (5), the protective film (6) comprising a third area (61) and a fourth area (62); an isolation film (3) attached to the second connecting surface (54) and covering the second connecting surface (54); wherein the first area (51) and the third area (61) are stacked to form the non-shielding area (11), and the second area (52) and the fourth area (62) are stacked to form the shielding area (12).

5. The barrier film according to claim 4, wherein the area of the second area (52) is greater than the area of the fourth area (62).

6. The barrier film according to claim 1, wherein the edge of the isolation film (3) is at least partially misaligned with the outer edge of the base film layer (1).

7. The barrier film according to claim 4, wherein the thickness of the second area (52) is greater than the thickness of the first area (51) in the direction from the first connecting surface (53) to the second connecting surface (54).

8. The barrier film according to claim 1, wherein The base film layer (1) has a main area and an edge area surrounding the main area, the main area has a first thickness, the edge area has a second thickness, and the second thickness is less than the first thickness.

9. The occlusive film of claim 8, wherein, Also included are: A first positioning part (7) is arranged in the edge area; A positioning frame (8) has a receiving groove (81) for receiving the to-be-shielded part (4) to expose the to-be-cleaned surface (41) and the to-be-shielded surface (42) of the to-be-shielded part (4), and the positioning frame (8) is provided with a second positioning part (9) corresponding to the first positioning part (7).

10. A glass characterized by, Included are: The shielding film according to any one of claims 1-9.

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