Edge construction for a polygonal sheet and composite edge sheet

Abstract

The application relates to the technical field of sheet edge covering, and discloses an edge covering structure of a polygonal sheet and a composite edge covering sheet. The edge covering structure comprises a first edge covering film for pasting a first surface, and a second edge covering film for pasting a second surface. The first edge covering film extends out of the first surface on the outside. The second edge covering film comprises mutually connected cover parts, bending parts and bonding parts. The cover parts are bonded to the second surface of the sheet. The bending parts are circumferentially arranged on the outside of the cover parts. After being bent relative to the cover parts, the bending parts are bonded to the side surface of the sheet. The bonding parts are arranged on the outside of the bending parts and are circumferentially arranged in multiple. After being bent relative to the bending parts, the bonding parts are bonded to the first edge covering film. The application can improve the edge covering effect of the sheet.

Description

Technical Field

[0001] This application relates to the technical field of sheet edging, and in particular to an edging structure for polygonal sheets and a composite edging sheet. Background Technology

[0002] Graphene sheets play a crucial role in industrial applications such as heat conductors, shielding devices, electromagnetic wave absorption equipment, and heat dissipation components. However, the edges of cut graphene sheets may crack and flake, potentially causing short circuits and other quality issues in subsequent applications. Therefore, it is necessary to pre-treat the edges of graphene sheets before use.

[0003] The commonly used packaging method is a "sandwich" structure, which is similar to the way sandwich food is made: graphene sheets are sandwiched between two thin film materials of equal size, which are larger than sheet materials and have central holes.

[0004] However, the existing sandwich edge-sealing technology is only suitable for materials with a thickness of no more than 0.6 mm. When the material thickness is greater than 0.6 mm, the sandwich edge-sealing method will produce a large edge-sealing gap at the edge of the product, forming a cavity. This not only affects the use of the sheet, but also makes it easy for the two film materials wrapped on both sides of the sheet to separate, resulting in an unstable edge-sealing. Utility Model Content

[0005] To improve the edge-binding effect of sheet materials, this application provides an edge-binding structure for polygonal sheets and a composite edge-binding sheet.

[0006] In a first aspect, this application provides an edge-binding structure for a polygonal sheet, employing the following technical solution:

[0007] An edge-sealing structure for a polygonal sheet, the sheet having a first surface and a second surface opposite to each other, and a plurality of side surfaces connecting the first surface and the second surface; the edge-sealing structure includes a first edge-sealing film and a second edge-sealing film, the first edge-sealing film being adhered to the first surface and having an extension amount relative to the edge of the sheet, the second edge-sealing film including a cover portion, a bending portion and an adhesive portion connected sequentially from the inside to the outside and arranged circumferentially;

[0008] The cover portion is bonded to the second surface of the sheet, the bent portion is bent relative to the cover portion and then bonded to the side of the sheet, and the adhesive portion is bent relative to the bent portion and then bonded to the first edge-sealing film.

[0009] By adopting the above technical solution, the first edge-sealing film extends outward to form a first surface, and the second edge-sealing film is bonded to the second surface and side of the sheet through the covering part, the bending part, and the adhesive part, and is also bonded to the first edge-sealing film. This can achieve edge sealing of polygonal sheets and avoid the problem of chipping and falling off the sheet edges. At the same time, the width of the bending part is the same as the thickness of the sheet, and its width is relatively narrow. When it bends downward along the edge of the sheet, the angle generated at the edge of the sheet is small, and even if the sheet is thick, it is not easy to produce edge sealing gaps. Through the bonding part to the first edge-sealing film, the bonding strength between the first edge-sealing film and the second edge-sealing film can be ensured, thereby ensuring the edge sealing strength of the sheet.

[0010] Optionally, the bent portion is formed by connecting several side portions one after the other in sequence, and a fracture is provided in the transition area between two adjacent side portions, the fracture extending along the angle bisector of the outer edge of the adjacent side portion.

[0011] By adopting the above technical solution, a fracture point that bisects the included angle is set at the junction of adjacent side parts, so that when the bent part is pressed down, the pressing force on the adjacent side parts does not affect each other, which can improve processing efficiency; further optimize the edge binding effect and improve the edge binding fit.

[0012] Optionally, the bent portion is formed by connecting several side portions one after the other in sequence, and a fracture is provided in the transition area between two adjacent side portions. The fracture extends along the extension direction of the inner edge line of any adjacent side portion.

[0013] By adopting the above technical solution, a fracture opening extending along the inner edge line of either adjacent side is set at the junction of adjacent side parts, so that when the adjacent side parts are pressed down, the movement trajectory of the edge parts on both sides does not affect each other, making it less likely to stick together, and the processing accuracy is higher.

[0014] Optionally, along the extension direction of the sheet, the length by which the first edge-sealing film extends beyond the edge of the sheet is greater than the length by which the second edge-sealing film extends beyond the edge of the sheet.

[0015] Optionally, the second edge-sealing film extends from the second surface of the sheet by a width of 3-20 mm.

[0016] By adopting the above technical solution, the width of the second edge-sealing film extending from the second surface of the sheet is 3-20mm, so that after the second edge-sealing film is bent and pressed along the edge of the sheet, it has sufficient bonding width with the first edge-sealing film, thus ensuring bonding strength.

[0017] Optionally, the width of the second edge-sealing film bonded together with the first edge-sealing film is 1-20 mm.

[0018] By adopting the above technical solution, it is possible to ensure that the second edge-sealing film and the first edge-sealing film have a suitable bonding width, avoid the edge-sealing being weak due to improper bonding width, and ensure the edge-sealing of polygonal sheets is stable.

[0019] Optionally, both the first and second edge-sealing films have through holes inside, and the inner sides of the first and second edge-sealing films are respectively bonded to the first and second surfaces of the sheet.

[0020] By adopting the above technical solution, the through holes in the first and second edge-sealing films can reduce the weight of the edge-sealing structure, while the inner sides of the first and second edge-sealing films are respectively bonded to the first and second surfaces of the sheet, thereby achieving effective bonding and fixing of the sheet.

[0021] Optionally, the bonding width between the inner sides of the first and second edge-sealing films and the sheet is 2-5 mm.

[0022] By adopting the above technical solution, the bonding width between the inner side of the first and second edge-sealing films and the sheet is 2-5mm, which can achieve a firm bond between the edge-sealing material and the sheet.

[0023] Optionally, the first edge-sealing film is a single-sided adhesive film or a hot melt adhesive film; and / or, the second edge-sealing film is a single-sided adhesive film or a hot melt adhesive film.

[0024] By adopting the above technical solution, the materials of the first and second edge-sealing films are selected as single-sided adhesive film or hot melt adhesive film. Single-sided adhesive film has the advantage of convenient operation and can quickly achieve bonding with the sheet material; hot melt adhesive film can firmly bond after heating and melting, forming a reliable and durable connection, effectively ensuring the stability of the edge-sealing structure.

[0025] Secondly, this application provides a composite edge-sealing sheet, which adopts the following technical solution:

[0026] A composite edge-sealing sheet includes a sheet and the aforementioned edge-sealing structure, wherein the first edge-sealing film and the second edge-sealing film of the edge-sealing structure together cover the edge of the sheet.

[0027] By adopting the above technical solution, a composite edge-sealing sheet with strong edge binding and stable quality is provided.

[0028] In summary, this application includes at least one of the following beneficial effects:

[0029] 1. By designing the bending and bonding parts of the second edge-sealing film, the edge-sealing structure fits the sheet better, solving the problem that the existing "sandwich" sandwich structure is prone to producing large edge-sealing gaps and forming cavities when edge-sealing thicker sheets. At the same time, the bonding part is bonded to the first edge-sealing film, reducing the problem of edge-sealing materials easily separating in related technologies.

[0030] 2. By creating a fracture point at the bend, the bend can fit the sheet more closely when pressed down, improving processing accuracy and further enhancing the edge binding effect. Attached Figure Description

[0031] Figure 1 This is a structural schematic diagram of Example 1;

[0032] Figure 2 This is a schematic diagram of the structure of the second edge-sealing film in Example 1;

[0033] Figure 3 This is a cross-sectional schematic diagram of the sheet edge wrapping in Example 1;

[0034] Figure 4 This is a schematic diagram of the sheet edge wrapping structure in Example 1;

[0035] Figure 5 This is a schematic diagram of the first method of setting the fracture surface in Example 2;

[0036] Figure 6 This is a schematic diagram of the second way to set the fracture surface in Example 2.

[0037] Explanation of reference numerals in the attached drawings: 101, sheet material; 102, first surface; 103, second surface; 1, first edge-sealing film; 2, second edge-sealing film; 21, covering part; 22, bending part; 221, fracture point; 23, adhesive part. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0039] Example 1:

[0040] This application discloses an edge-binding structure for a polygonal sheet. (Refer to...) Figure 1 The sheet 101 has a first surface 102 and a second surface 103 opposite to each other, and a plurality of side surfaces connected between the first surface 102 and the second surface 103; in this embodiment, the first surface 102 is the lower surface of the sheet 101, and the second surface 103 is the upper surface of the sheet 101.

[0041] Reference Figure 2 and Figure 3The edge-sealing material includes a first edge-sealing film 1 and a second edge-sealing film 2. The first edge-sealing film 1 is adhered to the first surface 102 and has an extension relative to the edge of the sheet 101. The second edge-sealing film 2 includes a cover portion 21, a bending portion 22, and an adhesive portion 23, which are connected sequentially from the inside out and arranged circumferentially. The cover portion 21 is adhered to the second surface 103 of the sheet 101. The bending portion 22 is arranged circumferentially outside the cover portion 21, and the bending portion 22 is bent downward relative to the cover portion 21 and then adhered to the side of the sheet 101. The adhesive portion 23 is arranged outside the bending portion 22 and is preferably arranged in a rectangular sheet structure. Multiple adhesive portions 23 are arranged circumferentially along the outer edge of the bending portion 22. The adhesive portion 23 is bent outward relative to the bending portion 22 and then adhered to the first edge-sealing film 1.

[0042] This structural design makes the width of the bending portion 22 similar to the thickness of the sheet 101, and the width is relatively narrow. When it bends downward along the edge of the sheet 101, the angle generated at the edge of the sheet 101 is small, avoiding the problem of large edge gaps in the existing "sandwich" edge binding technology. At the same time, after the bending portion 22 is bent, the relatively independently set adhesive portion 23 bends outward and is bonded to the first edge binding film 1. Since the adhesive portion 23 and the adhesive portion 23 of the first edge binding film 1 are tightly fitted without gaps, the bonding strength between the first edge binding film 1 and the second edge binding film 2 can be ensured.

[0043] In this embodiment of the application, when edge-wrapping the sheet 101, the first edge-wrapping film 1 is first bonded to the first surface 102 and flush with the first surface 102, and then the second edge-wrapping film 2 is bonded to the second surface 103 and flush with the second surface 103. Then, the bending portion 22 and the bonding portion 23 are bent in sequence toward the direction of the first edge-wrapping film 1.

[0044] In an optional embodiment, to ensure the adhesion effect of the edge-sealing materials on both sides, the length of the first edge-sealing film 1 extending out of the sheet 101 is greater than the length of the second edge-sealing film 2 extending out of the sheet 101; at the same time, the width of the second surface 103 of the second edge-sealing film 2 extending out of the sheet 101 is 3-20mm, or the width of the second edge-sealing film 2 bonded together with the first edge-sealing film 1 is 1-20mm; the thickness of the sheet 101 is generally within 2mm. This arrangement ensures that the second edge-sealing film 2 and the first edge-sealing film 1 have a reasonable bonding width, thereby guaranteeing the bonding strength.

[0045] Reference Figure 1 and Figure 4, in an optional embodiment, through holes are provided inside both the first edge - wrapping film 1 and the second edge - wrapping film 2, and the shape of the through holes is adapted to the shape of the sheet 101. These through holes can not only reduce the material usage but also contribute to the heat dissipation inside the sheet 101. The width of the inner side of the first edge - wrapping film 1 and the second edge - wrapping film 2 bonded and covering the sheet 101 is 2 - 5 mm. Such a moderate bonding width can ensure the bonding strength on the sheet 101 without overly occupying the effective area of the sheet 101.

[0046] In an optional embodiment, the first edge - wrapping film 1 and the second edge - wrapping film 2 can be made of various materials. For example, a single - sided adhesive film can be used. One side of this film has adhesiveness, which can be conveniently pasted on the first surface 102 of the sheet 101. A hot - melt adhesive film can also be used. By heating, the film becomes adhesive, further improving the adhesion effect.

[0047] Furthermore, the bending part 22 is formed by sequentially connecting several side parts end to end. A fracture opening 221 is provided in the connection transition area between two adjacent side parts. The fracture opening 221 can penetrate through the bending part 22. Thus, when the bending part 22 bends and bonds to the side of the sheet 101, it is not affected by adjacent side parts, reducing stress concentration, facilitating processing, and improving processing efficiency.

[0048] The edge - wrapping structure of the present application can perform edge - wrapping on polygonal sheets, including but not limited to triangles, quadrilaterals, pentagons, hexagons, etc. For the convenience of understanding, the following takes the rectangular sheet 101 as an example to further describe the edge - wrapping structure of the present application.

[0049] Refer to Figure 1 and Figure 2 , when processing the rectangular sheet 101, the first edge - wrapping film 1 can be set as a "hui" - shaped sheet structure corresponding to the shape of the sheet 101. The covering part 21 and the bending part 22 of the second edge - wrapping film 2 are also set as "hui" - shaped sheet structures. Bonding parts 23 in the shape of rectangular sheets are provided on the outer sides of the long side parts and short side parts of the bending part 22. Optionally, for the convenience of bonding, the two ends of the bonding part 23 corresponding to the short side part can be cut inwards by 2 - 5 mm in length.

[0050] In the embodiment of the application, the fracture opening 221 extends along the angle bisector of the outer edges of adjacent side portions. That is, when the sheet 101 is rectangular, the fracture opening 221 extends along the angle bisector formed by the outer edges of the long and short side portions. This design ensures that the long and short side portions of the bent portion 22 do not affect each other during bending, making the pressing process smoother. After the bent portion 22 is bent towards the first edge-sealing film 1 and bonded to the side of the sheet 101, a section of its edge extends outwards. The upturned portions on adjacent sides can be bent and bonded to the side of the sheet 101, or they can be bonded to each other to form a small angle. The edge-sealing material is relatively thin, usually at the micrometer level, so it will not affect the subsequent use of the sheet 101.

[0051] The implementation principle of the edge-wrapping structure of a polygonal sheet in this application embodiment is as follows: When wrapping the edge of the sheet 101, firstly, the first edge-wrapping film 1 is bonded to the first surface 102 and flush with the first surface 102. During bonding, the inner side of the first edge-wrapping film 1 covers the first surface 102 by 2-5mm, and the outer side extends out of the sheet 101. Then, the second edge-wrapping film 2 is bonded to the second surface 103 and flush with the second surface 103. During bonding, the inner side of the second edge-wrapping film 2 is also flush with the first surface 103. 02. Cover 2-5mm, extend outward from the surface of the second sheet 101, and then press the bent part 22 downward along the upper surface edge of the sheet 101 so that the bent part 22 is bonded to the side of the sheet 101. Next, bend the bonding part 23 outward along the lower surface edge of the sheet 101 so that the bonding part 23 is bonded to the first edge-sealing film 1. Finally, bend the excess raised part of the edge of the bent part 22 inward toward the side of the sheet 101, or bond the raised parts of adjacent sides of the bent part 22 to each other.

[0052] Example 2:

[0053] The difference between this embodiment and Embodiment 1 lies in the location of the fracture opening 221 on the bent portion 22. When the sheet 101 thickness is less than 1 mm, the packaging structure of Embodiment 1 has higher processing efficiency; when the sheet 101 thickness is greater than 1 mm, the included angles of the raised edges of the bent portion 22 may stick together when processing with the packaging structure of Embodiment 1, affecting processing accuracy. Therefore, this embodiment provides different ways of setting the fracture opening 221.

[0054] In this embodiment, the fracture opening 221 extends along the inner edge of either adjacent side. That is, when the sheet 101 is rectangular, the fracture opening 221 can extend along the inner edge of the long side or along the inner edge of the short side. In this configuration, when the bent portion 22 is pressed down, the long side and the short side of the bent portion 22 separate from each other during the bending process, resulting in higher processing accuracy.

[0055] Reference Figure 5 When the fracture opening 221 extends along the inner edge of the long side, during bonding, after the short side and the long side of the bent portion 22 are pressed and bonded to the side of the sheet 101, the portion of the long side extending out of the sheet 101 is bent and bonded towards the side of the short side of the sheet 101.

[0056] Reference Figure 6 When the fracture opening 221 extends along the inner edge of the short side, and the fracture opening 221 extends outward to the edge of the adhesive part 23; during bonding, after the short side and the long side of the bent part 22 are pressed and bonded to the side of the sheet 101, the remaining part of the short side is bent and bonded towards the side of the long side of the sheet 101.

[0057] Example 3:

[0058] This application discloses a composite edge-wrapping sheet 101, including the edge-wrapping structure in the above embodiment, wherein the first edge-wrapping film 1 and the second edge-wrapping film 2 in the edge-wrapping structure jointly wrap the edge of the sheet 101.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A edging structure for a polygonal sheet, characterized in that: The sheet (101) has opposing first surfaces (102) and second surfaces (103), and a plurality of side surfaces connecting the first surfaces (102) and the second surfaces (103); The edge-sealing structure includes a first edge-sealing film (1) and a second edge-sealing film (2). The first edge-sealing film (1) is adhered to the first surface (102) and has an extension relative to the edge of the sheet (101). The second edge-sealing film (2) includes a cover portion (21), a bending portion (22) and an adhesive portion (23) that are connected sequentially from the inside to the outside and arranged circumferentially. The cover portion (21) is bonded to the second surface (103) of the sheet (101), the bent portion (22) is bent relative to the cover portion (21) and bonded to the side of the sheet (101), and the adhesive portion (23) is bent relative to the bent portion (22) and bonded to the first edge-sealing film (1).

2. The edge-binding structure of the polygonal sheet according to claim 1, characterized in that: The bending portion (22) is formed by connecting several side portions one after the other in sequence. A fracture opening (221) is provided in the transition area between two adjacent side portions. The fracture opening (221) extends along the angle bisector of the outer edge of the adjacent side portion.

3. The edge-binding structure of the polygonal sheet according to claim 1, characterized in that: The bending portion (22) is formed by connecting several side portions one after the other in sequence. A fracture opening (221) is provided in the transition area between two adjacent side portions. The fracture opening (221) extends along the extension direction of the inner edge line of any adjacent side portion.

4. The edge-binding structure of the polygonal sheet according to any one of claims 1-3, characterized in that: Along the extending direction of the sheet (101), the length of the first edge-sealing film (1) extending beyond the edge of the sheet (101) is greater than the length of the second edge-sealing film (2) extending beyond the edge of the sheet (101).

5. The edge-binding structure of the polygonal sheet according to claim 4, characterized in that: The second edge-sealing film (2) extends from the second surface (103) of the sheet (101) by a width of 3-20 mm.

6. The edge-binding structure of the polygonal sheet according to claim 4, characterized in that: The width of the second edge-sealing film (2) bonded together with the first edge-sealing film (1) is 1-20 mm.

7. The edge-binding structure of a polygonal sheet according to any one of claims 1-3, characterized in that: Both the first edge-sealing film (1) and the second edge-sealing film (2) have through holes inside, and the inner sides of the first edge-sealing film (1) and the second edge-sealing film (2) are respectively bonded to the first surface (102) and the second surface (103) of the sheet (101).

8. The edge-binding structure of the polygonal sheet according to claim 7, characterized in that: The bonding width between the inner side of the first edge-sealing film (1) and the second edge-sealing film (2) and the sheet (101) is 2-5 mm.

9. The edge-binding structure of the polygonal sheet according to claim 1, characterized in that: The first edge-sealing film (1) is a single-sided adhesive film or a hot melt adhesive film; and / or, the second edge-sealing film (2) is a single-sided adhesive film or a hot melt adhesive film.

10. A composite edge-sealing sheet, characterized in that: The sheet (101) includes the edge-wrapping structure according to any one of claims 1-9, wherein the first edge-wrapping film (1) and the second edge-wrapping film (2) of the edge-wrapping structure together cover the edge of the sheet (101).

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