Shielding film assembly

Abstract

The utility model discloses a shielding film assembly. The shielding film assembly sequentially comprises a release film, a first film layer, a middle film layer and a stripping film layer from bottom to top, the size of each film layer / paper is matched with the size of an article to be shielded, and each film layer / paper is flush with the periphery of the adjacent film layer / paper; the release film is adhered to one side, with the adhesive, of the first film layer, and at least part of the release film is removed when the shielding film is positioned; the first film layer comprises a first shielding film and an adhesive positioned on the bottom surface of the first film layer, and the first shielding film is made of a transparent material; the middle film layer comprises at least three overlapped shielding films, each shielding film can be relatively removed, the bottom surface of each shielding film comprises an adhesive, and the stripping film layer comprises a stripping film and an adhesive positioned on the bottom surface of the stripping film. The utility model is suitable for the field of surface protection influenced by industrial surface treatment operation, such as surface cleaning, grinding, solvent treatment and decoration / coating, so as to isolate a shielded area from related liquid.

Description

Technical Field

[0001] The utility model relates to the field of shielding devices, and more specifically to the scope of a protective device for manufacturing a surface area for receiving a certain liquid application temporarily adhered to a part of the surface of an automobile body or an aircraft, allowing the area to be isolated from the liquid, and more specifically to a device for masking an area and a method for manufacturing such a masking device. Background Art

[0002] Currently, various devices are known that can cover one or more areas of a surface to protect these areas during a specific treatment of the surface, such as masking films, masking tapes, papers, etc. The application of such protection can be achieved according to several consecutive surface treatment operations, such as paint stripping, primer spraying, topcoat spraying, clear coat spraying, etc.

[0003] In the aviation field, especially in the context of painting the fuselage of an aircraft, adhesive films are adhered to the areas of the fuselage surface to protect them from painting.

[0004] In this context, as an example of the application of the present utility model, these areas to be protected consist of aircraft windows. Aircraft windows typically have glass plates embedded in a metal frame riveted to the aircraft fuselage. The frame includes a gasket between the glass and the metal frame. Before the painting operation, a masking film is applied to the window to cover the glass and part of the joint. After the application of the masking film, the fuselage is sanded or stripped of paint and several layers of paint (usually three layers) are sprayed. Existing masking films include multi-layer composite adhesive films, and each layer is removed after the peeling operation and the drying of each layer of paint. EP3287195A1 discloses a masking kit including an inner part and an outer peripheral part separated by an intermediate part, the covering kit including a film, a first surface of the lower surface, the first surface being coated with an adhesive substance and covered with at least a partially removable protective sheet. In addition, the masking kit includes a visualization device adapted to be seen locally through the masking kit and configured to form a mark. WO2012 / 160305 discloses a masking kit including a mask of a film, the contour of the mask taking the form of the part to be masked, and the lower surface of the mask to be applied to the surface to be masked being provided with at least a partially removable protective sheet, and at least one flange detachably bonded to the edge of the upper surface of the film, and the outer boundary of the flange following the contour of the film. Summary of the Invention

[0005] The purpose of the present utility model is to overcome the deficiencies in the prior art and propose a masking film assembly for spraying, which is used to shield the area to be protected from paint, and the masking film assembly can be produced quickly and is easy to use.

[0006] A masking film assembly, which sequentially includes from bottom to top: a first film layer, an intermediate film layer, and a release film layer; the sizes of the film layers / papers are adapted to the size of the item to be masked, and the outer perimeters of the film layers / papers are flush with those of their adjacent film layers / papers;

[0007] Based on the above characteristics, the film layers can be stacked together and then the least number of cutting operations can be performed to fabricate the above masking film assembly. In particular, they can be cut once along the outer perimeters of the masking films of each layer to make them flush with each other.

[0008] The (releasing film) is adhered to the side of the first film layer with adhesive, and at least part of the release film is removed when positioning the masking film;

[0009] The first film layer includes a first masking film 3 and an adhesive on its bottom surface, and the first masking film 3 is made of a transparent material; the material of the first masking film is selected from PVC, PE, PET, PP, PS, etc.;

[0010] The intermediate film layer includes at least three stacked masking films, and each layer of masking film can be removed relatively. The bottom surfaces of the masking films all include adhesives, so that they are adhered to the top of the masking film below through the adhesives; the material of the masking films in the intermediate film layer is selected from PVC, PE, PET, PP, PS, etc.;

[0011] The release film layer includes a release film and an adhesive on its bottom surface, and the material of the release film 9 is selected from aluminum, PVC, PE, PET, PP, PS, etc.

[0012] Furthermore, crosshairs are printed at specific positions of the first masking film of the first film layer for positioning the masking film assembly so that it can be easily aligned with the position required by the item to be masked.

[0013] Furthermore, a circular incision is formed around the outer perimeter of the release film 1, and an arc-shaped portion is pre-cut radially in the circular incision as a tongue portion to form a release strip including the tongue portion. After the release strip is removed, the adhesive layer thereon can be exposed for adhering to the item to be masked when positioning and / or pasting the masking film assembly.

[0014] Optionally, two through holes are respectively provided in the intermediate film layer and the release film layer, and the positions of the through holes in each layer correspond; thus, two openings are formed longitudinally along the masking film assembly. The openings are both located at the positions corresponding to the release strip and are respectively located at the positions where the crosshairs of the first film layer are located. The size of the openings is such that the crosshairs can be exposed. The advantage of such a setting is that the openings are circular holes and are directly above the crosshair marks to form positioning windows to guide the positioning of the masking film on the area to be masked.

[0015] Particularly preferably, the openings are respectively located at the 12 o'clock and 3 o'clock positions of the stripping tape.

[0016] Furthermore, the outer contour of the shielding film assembly is selected from a circle, an ellipse, a rectangle, a triangle or other polygons, as long as it can correspond to the outer contour of the window to be shielded.

[0017] Furthermore, the first film layer, the intermediate film layer and the stripping film layer are all cut by a curve to form two "yin-yang" shaped parts, each part having an easily peelable tip and a large water droplet-shaped end, which is convenient for peeling from the article to be shielded. Each film layer is pre-cut into a "yin-yang" shape to make it easy to tear off. Such a setting allows each film layer to be easily removed to expose the underlying shielding film.

[0018] Preferably, the shielding films of each film layer are cut by a curve with the same curvature to form two "yin-yang" shaped parts, and the curve of the shielding film of each layer is rotated counterclockwise by 30 degrees relative to the curve of the shielding film of its lower layer.

[0019] Furthermore, the shielding film assembly is formed into a multi-layer structure using shielding films made of different materials. This arrangement makes the operation of the shielding device simpler and is applicable to various different working scenarios. For example, an aluminum film is suitable for shielding protection during paint stripping and cleaning work, and a PVC film is suitable for shielding protection during painting, etc.

[0020] Furthermore, the shielding film assembly is preferably used for shielding the windows of public transportation during spraying, and more preferably for shielding the outer surface of the aircraft window during spraying.

[0021] The present utility model also relates to a manufacturing method of the shielding film assembly as described above, including the following steps:

[0022] Print two crosshairs on the upper surface of the first film layer to assist in positioning; a release film is pasted on the bottom surface of the first film layer; and the release film is pre-cut into a ring at a certain distance from the edge to form a stripping tape, which is convenient for tearing off the stripping tape during use to expose the adhesive layer thereon for subsequent positioning;

[0023] Open a curve on the first film layer to form two "yin-yang" shaped parts, each part having an easily peelable tip and a large water droplet-shaped end, and each part can be easily removed by pulling the tip during use;

[0024] Stack a plurality of shielding films on the top of the first film layer to form an intermediate film layer and a stripping film layer. Each layer of shielding film can cover the shielding film below it, and the sizes of each layer of shielding film are the same as the size of the first film layer;

[0025] Two through holes are cut on the masking films for forming the intermediate film layer and the release film layer respectively to form openings, and the openings are located directly above the crosshairs to form positioning windows; and a curve is formed on the masking films for forming the intermediate film layer and the release film layer respectively to form two "yin-yang" shaped parts, and the curves of each film layer are rotated 30 degrees relative to the curve of the film layer below it;

[0026] Final cutting is performed along the outer contour of the masking film assembly so as to be flush with the size of the article to be covered.

[0027] Furthermore, this masking film is applicable to the preparatory work before painting, such as removing oil stains, foreign objects with uneven surfaces, or the original paint surface on the surface of the covered article by methods such as grinding, sanding, or chemical paint stripping.

[0028] The utility model is applicable to the field of surface protection affected by industrial surface treatment operations, such as cleaning, grinding, solvent treatment, paint spraying, or decoration / painting of the surface, so as to isolate the masked area from relevant liquids.

[0029] The masking film assembly described in the utility model is easy to manufacture and can be used as a disposable masking device for all operations.

[0030] Compared with the prior art, the structure of the utility model is simple. It is not only convenient for spray masking, but also by setting a positioning window with an opening, it is convenient for precise positioning and pasting, reducing the number of repeated positioning due to positioning errors; moreover, each layer of masking film is designed as an easy-to-tear "yin-yang" shape, making the application easier. Description of the Drawings

[0031] Figure 1 is the front view of the release film in the masking film assembly described in the utility model;

[0032] Figure 2 is Figure 1 the rear view of;

[0033] Figure 3a is Figure 1 the side sectional view of the masking film assembly shown in; Figure 3b is Figure 3a the partial enlarged view of.

[0034] Wherein,

[0035] 1: release film; 2: first adhesive layer; 3: first masking film;

[0036] 4: second adhesive layer; 5: second masking film; 6: third adhesive layer;

[0037] 7: third masking film; 8: fourth adhesive layer; 9: release film; 10: tongue;

[0038] 11: First region; 12: Second region; 13: Opening; 14: Tip; 15: Large end. Detailed implementation mode

[0039] The technical solution of the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The specific embodiments described are only used to explain the present utility model and are not intended to limit the present utility model.

[0040] As Figure 1-2 shown, a masking film assembly for painting an aircraft window. The masking film assembly is used to mask the outer surface of the aircraft window during painting, aiming to protect the aircraft window from the effects of painting preparation (grinding, polishing, chemical paint stripping) or such paints usually applied to the aircraft fuselage. Therefore, the area masked by the masking film assembly is adapted to the shape and size of the aircraft window.

[0041] As Figure 3a shown, the masking film assembly includes a plurality of masking films, which successively include a release film 1, a first adhesive layer 2, a first masking film 3, a second adhesive layer 4, a second masking film 5, a third adhesive layer 6, a third masking film 7, a fourth adhesive layer 8 and a release film 9 from bottom to top; the sizes of each layer of film / adhesive layer are the same as the size of the aircraft window, and the outer peripheries of each layer of film / adhesive layer are flush with those of its adjacent (upper or lower) film / adhesive layer.

[0042] The first masking film 3 is a transparent film, made of PE, with a thickness of 100 μm.

[0043] The second masking film 5 is an opaque film, made of PVC, with a thickness of 100 μm.

[0044] The third masking film 7 is an opaque film, made of PP with a thickness of 195 μm.

[0045] The release film 9 is made of aluminum, with a thickness of 70 μm.

[0046] The bottom surface of the first masking film 3 is fixedly provided with the first adhesive layer 2, the bottom surface of the second masking film 5 is fixedly provided with the second adhesive layer 4, the bottom surface of the third masking film 7 is fixedly provided with the third adhesive layer 6, and the bottom surface of the release film 9 is fixedly provided with the fourth adhesive layer 8. When the masking film is removed, each adhesive layer can adhere to the bottom of the fixedly provided film.

[0047] The first masking film 3, the second masking film 5, the third masking film 7 and the release film 9 are all coated with an adhesive on their bottom surfaces to form corresponding adhesive layers. The adhesive is not limited here, as long as it has adhesive ability, can fix the masking film in the position facing another film, and when the masking film is removed, the adhesive layer can still adhere to the corresponding masking film and will not leave any glue residue on the underlying masking film.

[0048] Moreover, the first masking film 3, the second masking film 5, the third masking film 7 and the stripping film 9 (including the adhesive layer thereof) are cut into two parts of a "yin-yang" shape by a curve, and both parts include a tip 14 and a large end 15 of a water drop shape gradually expanded along the tip 14. The tip is used as a stripping area, and it is easy to remove the layer after the coating operation because of its pointed portion. Moreover, from bottom to top, the cutting curve of each masking film (including the adhesive layer thereof) is 30 degrees counterclockwise compared to the cutting curve of the masking film below it, thereby avoiding the stripping of multiple layers.

[0049] The release film 1 is detachably disposed at the bottom of the first adhesive layer 2, and Figure 1 As shown, the release film 1 is made of silicone paper, and the release film 1 includes a pre-cut arc-shaped tongue 10 and a dot-interrupted inner circumference, thereby dividing the release film 1 into a first area 11 and a second area 12, and the second area 12 is located inside the first area 11. The first area 11 is located on the outer circumference of the release film 1 to form a ring, and an arc-shaped portion is radially pre-cut between the outer ring and the inner ring of the first area 11 as the tongue 10 (as shown in the figure, the tongue is located at the 11 o'clock direction), so that the tongue 10 and the first area 11 form a strip-shaped peeling tape. When in use, the operator pulls the tongue 10 at the 11 o'clock direction to uncover the first area 11, thereby removing the first area 11 and exposing the first adhesive layer 2 thereon, while the second area 12 of the release film 1 is maintained on the second area 12. Once the peeling tape formed by the tongue 10 and the first area 11 is removed, the first adhesive layer 2 at the location of the first area 11 is adhered to the four sides of the window within a limited time, while the middle part of the first adhesive layer 2 (corresponding to the location of the second area) is not adhered to the window.

[0050] like Figure 1 -3, the shielding film assembly is an oblong shape extending along the longitudinal axis direction so as to shield various aircraft windows. The above is only an example, and the shielding film assembly of the utility model does not exclude any shape as long as it is suitable for shielding the area. The shielding film assembly can be rectangular, triangular or polygonal in shape, with rounded edges, or even elliptical, so as to adapt to any type of window (such as aircraft cockpit, railway, bus, etc.).

[0051] The side of the release film 9 away from the fourth adhesive layer 8 serves as the top surface, and the material of the top surface is aluminum material for the purpose of paint stripping.

[0052] like Figure 3bAs shown, two concentric through-holes are formed in each of the second adhesive layer 4, the second masking film 5, the third adhesive layer 6, the third masking film 7, the fourth adhesive layer 8, and the release film 9 (only one through-hole is shown in the figure). The through-hole positions of each layer correspond to each other, so as to form a recessed opening 13 relative to the masking film assembly. The diameter of the opening is 10 mm to allow at least a part of the masked area to be observed when the masking film assembly is placed. As Figure 1 shown, the position of the opening 13 is located at the position corresponding to the first area (i.e., the release strip), and the openings are respectively located at the center positions of the upper end (12 o'clock direction) and the right area (3 o'clock direction) of the first area.

[0053] When the masking film assembly is placed on the area to be masked, the opening 13 formed by the through-holes is used for positioning. Since the first masking film 3 is a transparent film, a crosshair is printed at the position of the opening 13 of the first masking film 3 to provide a guiding vision for positioning. Such a setting makes the opening 13 form a similar geometric shape to a bubble level. For this reason, the horizontal crosshair of the opening 13 in the 12 o'clock direction is symmetric with the horizontal axis of the masking film assembly. In addition, the vertical crosshair of the opening 13 in the 3 o'clock direction is symmetric with the vertical axis of the masking film assembly.

[0054] The opening 13 is used to accurately guide the positioning of the masking film assembly by means of the visible crosshair of the opening. Especially when positioning the frame gasket edge of the window to be masked, it is easier to position the masking film assembly.

[0055] In use, the user pulls the tongue 10 to remove the release strip formed by the tongue 10 and the first area 11. Then, the opening 13 in the 12 o'clock direction is roughly positioned relative to the upper window frame edge of the aircraft window, and a very small part of the first area 11 of the masking film assembly at the opening 13 is adhered to the window frame to form a fixed point. Subsequently, the user needs to properly position the opening 13 in the 3 o'clock direction relative to the right window frame. For example, by slightly tilting the masking film assembly along the rotation axis relative to the fixed point, and pasting all or part of the first area of the masking film assembly to the window. Such a setting significantly reduces the risk of errors in positioning the masking film assembly and reduces the number of corrective measures due to positioning errors.

[0056] The manufacturing method of the masking film assembly includes:

[0057] Step 1: Printing, printing two crosshairs on the upper surface of the transparent first masking film 3, and the positions of the crosshairs respectively correspond to the opening 13 in the 12 o'clock direction and the opening 13 in the 3 o'clock direction;

[0058] Step 2: Cut the first masking film 3 (including the adhesive layer) and the 1 pasted at its bottom, with the cutting size and shape being the same as those of the aircraft window to be masked;

[0059] Step 3: Cut the first masking film 3 with an adhesive bottom surface into two parts in a "yin-yang" shape through a curve, each part having an easily peelable tip 14 and a water-drop-shaped large end 15 for easy peeling from the aircraft window; the first masking film 3 is pre-printed with crosshairs at specific positions;

[0060] Generally, the first masking film is cut from a larger transparent film, and the bottom surface of the first masking film is provided with a first adhesive layer 2 and a layer. Optimize the cutting method during cutting to cut out as many of the masking films as possible from the raw material.

[0061] Step 4: Pre-cut an annular shape at a certain distance from the edge of the release film 1 to form a release strip, and the release strip includes a tongue 10 and a first area 11; after peeling, the first adhesive layer 2 at the position of the first area 11 is exposed for subsequent positioning and pasting of the window;

[0062] Step 5: Cut the second masking film 5 and the third masking film 7 with adhesive bottom surfaces (i.e., the second adhesive layer 4, the second masking film 5, the third adhesive layer 6, and the third masking film 7) into the same shape as the first masking film 3; and the second masking film 5 and the third masking film 7 with adhesive bottom surfaces are provided with two through holes at the crosshair positions of the first masking film 3, so as to form two openings 13 on the upper surface of the first masking film 3, and the openings are respectively the opening 13 at the 12 o'clock direction and the opening 13 at the 3 o'clock direction of the masking film assembly;

[0063] Cut the second masking film 5 and the third masking film 7 into two parts in a "yin-yang" shape through a curve with the same curvature as the first masking film 3, each part having an easily peelable tip 14 and a water-drop-shaped large end 15 for easy peeling from the aircraft window, and the curves of each layer of masking film are rotated counterclockwise by 30 degrees with respect to the curves of the lower layer of masking film;

[0064] Generally, each layer of the masking film is cut from a larger PVC film or kraft paper, and the bottom surface of the masking film is provided with an adhesive layer and a layer. Optimize the cutting method during cutting to cut out as many of the masking films as possible from the raw material.

[0065] Step 6: Similar to Step 5, cut the release film 9 with an adhesive bottom surface into the same shape as the first masking film 3, and provide two through holes at the crosshair positions of the first masking film 3, so as to form two openings 13 on the upper surface of the first masking film 3, and the openings are respectively the opening 13 at the 12 o'clock direction and the opening 13 at the 3 o'clock direction of the masking film assembly;

[0066] The stripping film 9 cuts the masking film into two parts forming a "yin-yang" shape through a curve with the same curvature as the first masking film 3. Each part has an easily peelable tip 14 and a large water-drop-shaped end 15, which is convenient for peeling from the aircraft window. And the curve of each layer of masking film rotates counterclockwise by 30 degrees relative to the curve of its lower-layer masking film;

[0067] The stripping film 9 is cut from a large aluminum film sheet. There is a fourth adhesive layer 8 and a layer on the bottom surface of the stripping film 9. The cutting method is optimized during cutting so as to cut out as many of the stripping films as possible from the raw material.

[0068] Step Seven: After removing the first masking film 3, the second masking film 5, the third masking film 7 with adhesive layers and the bottom surface of the stripping film 9, the release film 1 prepared in the above steps, the first masking film 3 with adhesive layer, the second masking film 5, the third masking film 7 and the stripping film 9 are pasted in sequence from bottom to top, and the outer periphery of each layer of film / adhesive layer is flush with that of its adjacent (upper or lower) film / adhesive layer, thereby completing the preparation of the masking film assembly.

[0069] Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the spirit and scope protected by the claims of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A shielding film assembly, characterized in that, From bottom to top, it successively includes: a release film (1), a first film layer, an intermediate film layer, and a release film layer; the sizes of each film layer / paper are adapted to the size of the article to be masked, and the outer perimeters of each film layer / paper are flush with those of its adjacent film layer / paper. The release film (1) is adhered to the side of the first film layer with an adhesive, and at least part of the release film (1) is removed when positioning the masking film. The first film layer includes a first masking film (3) and an adhesive on its bottom surface, and the first masking film (3) is made of a transparent material; the material of the first masking film is selected from one of the following: PVC, PE, PET, PP, and PS. The intermediate film layer includes at least three superimposed masking films, and each layer of masking film can be relatively removed. The bottom surface of each masking film includes an adhesive, so that it is pasted on the top of the masking film located below through the adhesive; the material of the masking film of the intermediate film layer is selected from one of the following: PVC, PE, PET, PP, and PS. The release film layer includes a release film (9) and an adhesive on its bottom surface, and the material of the release film (9) is selected from one of the following: aluminum, PVC, PE, PET, PP, and PS.

2. The masking film assembly according to claim 1, wherein The release film (1) is provided with an annular incision around its outer perimeter, and an arc-shaped portion is pre-cut in the radial direction of the annular incision as a tongue portion (10), forming a release strip including the tongue portion (10). After the release strip is removed, the adhesive layer thereon can be exposed for pasting on the article to be masked when positioning and / or pasting the masking film assembly.

3. The masking film assembly according to claim 2, wherein The intermediate film layer and the release film layer are each provided with 2 through holes, and the positions of the through holes in each layer correspond; thus, two openings (13) are formed along the longitudinal direction of the masking film assembly. The openings (13) are both located at the positions corresponding to the release strip and are respectively located at the positions of the crosshairs of the first film layer, guiding the positioning of the masking film assembly on the area to be masked.

4. The masking film assembly according to claim 3, wherein The first masking film (3) of the first film layer is printed with crosshairs at the positions of the openings (13) for positioning the masking film assembly so that it can be aligned with the area to be masked.

5. The masking film assembly according to claim 1, wherein The outer contour of the masking film assembly is selected from a circle, an ellipse, a rectangle, a triangle, or a polygon other than those described above.

6. The masking film assembly according to claim 1, wherein, The first film layer, the intermediate film layer, and the release film layer are each cut into two "yin-yang" shaped parts by a curve. Each part has an easily peelable tip (14) and a large water-drop shaped end (15), which is convenient for peeling from the article to be masked.

7. The masking film assembly according to claim 6, wherein, The masking film of each film layer is cut into two "yin-yang" shaped parts by a curve with the same curvature, and the curve of each layer of masking film rotates counterclockwise by 30 degrees relative to the curve of the masking film of its lower layer.

8. The masking film assembly according to claim 1, wherein, At least two masking films of different materials are included in the masking film assembly.

9. The masking film assembly according to claim 1, wherein The masking film assembly is used for masking the windows of public transportation vehicles during spraying.

Images