A sliding-assisting and wave-absorbing film for a pivot shaft

Abstract

The present invention discloses a sliding-assisting and wave-absorbing film for a pivot shaft. A double-sided self-adhesive layer, a wave-absorbing layer, and a polytetrafluoroethylene tape layer are sequentially pasted on the isolation film layer from top to bottom. The acrylonitrile flame-retardant tape layer is located on the right side of the polytetrafluoroethylene tape layer and adhered to the isolation film layer. After the double-sided self-adhesive layer and the wave-absorbing layer are attached to the polytetrafluoroethylene tape layer, they do not completely cover the polytetrafluoroethylene tape layer. The double-sided self-adhesive layer, the wave-absorbing layer, the polytetrafluoroethylene tape layer, and the acrylonitrile flame-retardant tape layer completely cover the silica gel protective layer after being adhered to the silica gel protective layer. The sliding-assisting and wave-absorbing film for a pivot shaft provided by the present invention has good buffer shock absorption, flame retardancy, and softness, is convenient for bending use, realizes good wave-absorbing function through the wave-absorbing layer, one side of the double-sided self-adhesive layer adheres to the wave-absorbing layer, and the other side adheres to the pivot shaft. The side of the polytetrafluoroethylene tape layer away from the wave-absorbing layer is a smooth plane, which is beneficial to reducing the contact friction force and improving the sliding assistance, and has more diverse functions.

Description

Technical Field

[0001] The present invention belongs to the technical field of wave-absorbing films, and particularly relates to a sliding-assisting wave-absorbing film for a pivot shaft. Background Art

[0002] With the rapid development of electronic technology, people's functional requirements are increasing day by day. The replacement speed of computer products, especially laptop computer products, is also accelerating day by day. However, the resulting electromagnetic wave pollution problem has also become a hot topic of concern. Electromagnetic waves can interfere with surrounding electronic instruments or devices and also affect human health.

[0003] A laptop computer usually consists of a display screen and a main body. One side of the display screen and the main body is pivotally connected together through a pivot shaft structure, so that the display screen can be opened and closed within a certain angle relative to the main body by rotating the pivot shaft structure. However, the existing pivot shaft structure is simple, with a single function, and its practicability needs to be improved. Summary of the Invention

[0004] To solve the problems in the prior art, the purpose of the present invention is to provide a sliding-assisting wave-absorbing film for a pivot shaft.

[0005] To achieve the above purpose and reach the above technical effects, the technical solution adopted by the present invention is as follows:

[0006] A sliding-assisting wave-absorbing film for a pivot shaft includes a mutually adapted double-sided self-adhesive layer, a wave-absorbing layer, a polytetrafluoroethylene tape layer, an acrylonitrile flame-retardant tape layer, and a silica gel protective layer. The silica gel protective layer includes a blue polyester film layer, a silica gel layer, and an isolation film layer arranged in sequence from bottom to top. The side of the isolation film layer away from the silica gel layer has adhesiveness. The double-sided self-adhesive layer, the wave-absorbing layer, and the polytetrafluoroethylene tape layer are sequentially pasted on the isolation film layer from top to bottom. The acrylonitrile flame-retardant tape layer is located on the right side of the polytetrafluoroethylene tape layer and is bonded to the isolation film layer. The sizes of the double-sided self-adhesive layer and the wave-absorbing layer are both smaller than the size of the polytetrafluoroethylene tape layer. After the double-sided self-adhesive layer and the wave-absorbing layer are attached to the polytetrafluoroethylene tape layer, they do not completely cover the polytetrafluoroethylene tape layer. After the double-sided self-adhesive layer, the wave-absorbing layer, the polytetrafluoroethylene tape layer, and the acrylonitrile flame-retardant tape layer are bonded to the silica gel protective layer, they completely cover the silica gel protective layer. L-shaped arc grooves are provided at the mutually adapted positions of the double-sided self-adhesive layer, the wave-absorbing layer, the polytetrafluoroethylene tape layer, and the silica gel protective layer.

[0007] Further, the double-sided self-adhesive layer and the wave-absorbing layer have the same structure and size. Arc-shaped grooves are opened at the same positions on the left side of the tops of the double-sided self-adhesive layer and the wave-absorbing layer, and L-shaped arc grooves are opened at the same positions on the right side of the tops of the double-sided self-adhesive layer and the wave-absorbing layer.

[0008] Furthermore, tear lines are provided at the same positions of the propylene flame-retardant tape layer and the silica gel protective layer, and a plurality of round through holes with different diameters are provided at the same positions of the propylene flame-retardant tape layer and the silica gel protective layer on the right side of the tear lines.

[0009] Furthermore, a square groove is provided in the middle of the left side of the silica gel protective layer, and the edges on the left and right sides of the square groove are chamfered.

[0010] Furthermore, the thickness of the double-sided self-adhesive layer is 10 μm.

[0011] Furthermore, the thickness of the wave-absorbing layer is 25 - 50 μm.

[0012] Furthermore, the thickness of the polytetrafluoroethylene tape layer is 50 - 70 μm.

[0013] Furthermore, the thickness of the propylene flame-retardant tape layer is 52 - 83 μm.

[0014] Furthermore, the thickness of the silica gel protective layer is 55 - 65 μm, the thickness of the silica gel layer is 10 μm, and the thickness of the isolation film layer is 47 - 53 μm.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] The present invention discloses a sliding and wave-absorbing film for a pivot shaft. One side of the isolation film layer away from the silica gel layer has adhesiveness. The double-sided self-adhesive layer, the wave-absorbing layer, and the polytetrafluoroethylene tape layer are sequentially pasted on the isolation film layer from top to bottom. The propylene flame-retardant tape layer is located on the right side of the polytetrafluoroethylene tape layer and is adhered to the isolation film layer. The sizes of the double-sided self-adhesive layer and the wave-absorbing layer are both smaller than the size of the polytetrafluoroethylene tape layer. After the double-sided self-adhesive layer and the wave-absorbing layer are attached to the polytetrafluoroethylene tape layer, they do not completely cover the polytetrafluoroethylene tape layer. The double-sided self-adhesive layer, the wave-absorbing layer, the polytetrafluoroethylene tape layer, and the propylene flame-retardant tape layer completely cover the silica gel protective layer after being adhered to the silica gel protective layer. L-shaped arc grooves are provided at the corresponding positions of the double-sided self-adhesive layer, the wave-absorbing layer, the polytetrafluoroethylene tape layer, and the silica gel protective layer. The sliding and wave-absorbing film for a pivot shaft provided by the present invention has good buffer shock absorption, flame retardancy, and softness, is convenient for bending use, realizes good wave-absorbing function through the wave-absorbing layer. The double-sided self-adhesive layer has double-sided adhesiveness. One side is used to adhere to the wave-absorbing layer, and the other side is wound and adhered to the pivot shaft after winding to achieve close fitting between the two. After the silica gel protective layer is torn off from the polytetrafluoroethylene tape layer, the side of the polytetrafluoroethylene tape layer facing the wave-absorbing layer has adhesiveness, and the side of the polytetrafluoroethylene tape layer away from the wave-absorbing layer is a smooth plane, which is beneficial to reducing the contact friction force and improving the sliding property without affecting the normal use of the pivot shaft, and the laptop can be opened and closed smoothly. Designing the size of the polytetrafluoroethylene tape layer to be larger than the sizes of the double-sided self-adhesive layer and the wave-absorbing layer is more beneficial to increasing the area of the smooth plane. The polytetrafluoroethylene tape layer exceeding the sizes of the double-sided self-adhesive layer and the wave-absorbing layer can also be adhered to the pivot shaft to improve the adhesiveness, with diverse functions and broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present invention;

[0018] Figure 2 is a schematic structural diagram of the silica gel protective layer of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The embodiments of the present invention will be described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0020] Such as Figure 1-2As shown in the figure, a sliding-assisting and wave-absorbing film for a pivot shaft includes a mutually adapted double-sided self-adhesive layer 1, a wave-absorbing layer 2, a polytetrafluoroethylene tape layer 3, a propylene flame-retardant tape layer 4, and a silica gel protective layer 5. The silica gel protective layer 5 includes a blue polyester film layer 6, a silica gel layer 7, and a release film layer 8 arranged in sequence from bottom to top. One side of the release film layer 8 away from the silica gel layer 7 has adhesiveness. The double-sided self-adhesive layer 1, the wave-absorbing layer 2, and the polytetrafluoroethylene tape layer 3 are sequentially pasted on the release film layer 8 from top to bottom. The propylene flame-retardant tape layer 4 is located on the right side of the polytetrafluoroethylene tape layer 3 and is jointly adhered to the release film layer 8 with the polytetrafluoroethylene tape layer 3. The sizes of both the double-sided self-adhesive layer 1 and the wave-absorbing layer 2 are smaller than that of the polytetrafluoroethylene tape layer 3. After the double-sided self-adhesive layer 1 and the wave-absorbing layer 2 are attached to the polytetrafluoroethylene tape layer 3, they do not completely cover the polytetrafluoroethylene tape layer 3. The double-sided self-adhesive layer 1 has double-sided adhesiveness. One side is used to bond the wave-absorbing layer 2, and the other side is wound and bonded to the pivot shaft after winding, realizing a tight fit between the two, having good buffering and shock-absorbing properties, flame retardancy, and softness, and being convenient for bending use. One side of the polytetrafluoroethylene tape layer 3 facing the wave-absorbing layer 2 has adhesiveness, and the side of the polytetrafluoroethylene tape layer 3 away from the wave-absorbing layer 2 is a smooth plane as the outer surface, which is beneficial to reducing the contact friction force and improving the sliding assistance. The sum of the widths of the polytetrafluoroethylene tape layer 3 and the propylene flame-retardant tape layer 4 is the same as the width of the silica gel protective layer 5. After the double-sided self-adhesive layer 1, the wave-absorbing layer 2, the polytetrafluoroethylene tape layer 3, and the propylene flame-retardant tape layer 4 are adhered to the silica gel protective layer 5, they completely cover the silica gel protective layer 5. The silica gel protective layer 5 is detachably attached to the side of the polytetrafluoroethylene tape layer 3 and the propylene flame-retardant tape layer 4 away from the wave-absorbing layer 2, which is convenient for tearing off to expose the smooth side of the polytetrafluoroethylene tape layer 3.

[0021] The double-sided self-adhesive layer 1 and the wave-absorbing layer 2 have the same structure and size. Arc-shaped grooves 10 are provided at the same position on the left side of the top of both the double-sided self-adhesive layer 1 and the wave-absorbing layer 2, and L-shaped arc-shaped grooves 11 are provided at the same position on the right side of the top of both the double-sided self-adhesive layer 1 and the wave-absorbing layer 2, which is convenient for later matching with laptop accessories.

[0022] A number of circular through-holes 12 are provided at the same position on both the propylene flame-retardant tape layer 4 and the silica gel protective layer 5. The diameters of the circular through-holes 12 may be different, and the circular through-holes 12 can also be designed into other shapes, as long as it is ensured that the structures, shapes, sizes, etc. of the circular through-holes 12 at the same position on the propylene flame-retardant tape layer 4 and the silica gel protective layer 5 are the same.

[0023] The propylene flame-retardant tape layer 4 is red, which is different from the colors of the double-sided self-adhesive layer 1, the wave-absorbing layer 2, the polytetrafluoroethylene tape layer 3, and the silica gel protective layer 5, making it convenient to distinguish. Tear lines 9 are provided at the same position on both the propylene flame-retardant tape layer 4 and the silica gel protective layer 5. The circular through-holes 12 are on the right side of the tear lines 9. After the layers are sequentially adhered, it is convenient to quickly tear off a part of the propylene flame-retardant tape layer 4 and the silica gel protective layer 5 along the tear lines 9 later.

[0024] A square groove 13 is provided in the middle of the left side of the silica gel protective layer 5. The edges on the left and right sides of the square groove 13 are chamfered to be more rounded, which is convenient for later matching with laptop accessories.

[0025] The double-sided self-adhesive layer 1 is prepared by coating a tackifying acrylic adhesive on a PET backing, with a thickness of 10 μm, high bonding strength, and the adhesion force under the ASTM D-3300 test standard is not less than 4.9 N / cm.

[0026] The thickness of the wave-absorbing layer 2 is 25 - 50 μm, its relative permeability (3 MHz) is not less than 30, and its surface resistivity is not less than 1.0×10 5 Ω / square, with good wave-absorbing and heat shock resistance performance, and is heat-resistant, moisture-resistant, and cold-resistant.

[0027] The thickness of the polytetrafluoroethylene tape layer 3 is 50 - 70 μm, the color is black, the elongation at break under the ASTM D-3759 test standard is not less than 135%, the tensile strength is not less than 18 MPa, and the adhesion to steel under the ASTM D-3330 test standard is not less than 0.4 KG / 25 mm.

[0028] The thickness of the propylene flame-retardant tape layer 4 is 52 - 83 μm. The propylene flame-retardant tape layer 4 has good flame-retardant performance, with a flame-retardant level of Class 1 flame retardancy, and has good low-temperature resistance, corrosion resistance, weather resistance and other excellent properties.

[0029] The thickness of the silica gel protective layer 5 is 55 - 65 μm. The adhesion of the silica gel protective layer 5 under the ASTM D-3330 test standard is 6 - 12 gf / inch, with good weather resistance and playing a role in surface protection. The outermost layer is a blue polyester film layer 6, which is easy to identify. The silica gel layer 7 is located in the middle with a thickness of 10 μm, and the thickness of the release film layer 8 is 47 - 53 μm.

[0030] When the polytetrafluoroethylene tape layer 3 and the propylene flame-retardant tape layer 4 of the present invention are jointly adhered to the silica gel protective layer 5, the thicknesses of the polytetrafluoroethylene tape layer 3 and the propylene flame-retardant tape layer 4 can be kept the same to facilitate the realization of a flat surface, or different thicknesses can also be used, which can be flexibly adjusted according to actual needs to improve the practicability.

[0031] For the parts not specifically described in the present invention, the prior art can be adopted and will not be elaborated here.

[0032] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are equally included in the patent protection scope of the present invention.

Claims

1. A sliding-assisting and wave-absorbing film for a pivot shaft, characterized in that It includes a mutually adapted double-sided self-adhesive layer (1), an electromagnetic wave absorbing layer (2), a polytetrafluoroethylene tape layer (3), a propylene flame-retardant tape layer (4), and a silica gel protective layer (5). The silica gel protective layer (5) includes a blue polyester film layer (6), a silica gel layer (7), and a release film layer (8) which are arranged in sequence from bottom to top. One side of the release film layer (8) away from the silica gel layer (7) has adhesiveness. The double-sided self-adhesive layer (1), the electromagnetic wave absorbing layer (2), and the polytetrafluoroethylene tape layer (3) are sequentially pasted on the release film layer (8) from top to bottom. The propylene flame-retardant tape layer (4) is located on the right side of the polytetrafluoroethylene tape layer (3) and is bonded to the release film layer (8). The sizes of the double-sided self-adhesive layer (1) and the electromagnetic wave absorbing layer (2) are both smaller than that of the polytetrafluoroethylene tape layer (3). After the double-sided self-adhesive layer (1) and the electromagnetic wave absorbing layer (2) are attached to the polytetrafluoroethylene tape layer (3), they do not completely cover the polytetrafluoroethylene tape layer (3). After the double-sided self-adhesive layer (1), the electromagnetic wave absorbing layer (2), the polytetrafluoroethylene tape layer (3), and the propylene flame-retardant tape layer (4) are bonded to the silica gel protective layer (5), they completely cover the silica gel protective layer (5). L-shaped arc grooves (11) are provided at the mutually adapted positions of the double-sided self-adhesive layer (1), the electromagnetic wave absorbing layer (2), the polytetrafluoroethylene tape layer (3), and the silica gel protective layer (5); The double-sided self-adhesive layer (1) and the electromagnetic wave absorbing layer (2) have the same structure and size. Arc-shaped grooves (10) are opened at the same positions on the left side of the tops of the double-sided self-adhesive layer (1) and the electromagnetic wave absorbing layer (2). L-shaped arc grooves (11) are opened at the same positions on the right side of the tops of the double-sided self-adhesive layer (1) and the electromagnetic wave absorbing layer (2); Tear lines (9) are provided at the same positions of the propylene flame-retardant tape layer (4) and the silica gel protective layer (5). A plurality of round through holes (12) with different diameters are opened at the same positions on the right side of the tear lines (9) and within the propylene flame-retardant tape layer (4) and the silica gel protective layer (5); A square groove (13) is opened in the middle of the left side of the silica gel protective layer (5). The edges on the left and right sides of the square groove (13) are chamfered; Good electromagnetic wave absorption function is achieved through the electromagnetic wave absorbing layer (2). The double-sided self-adhesive layer (1) has double-sided adhesiveness. One side is used to bond the electromagnetic wave absorbing layer, and the other side is wound and bonded to the pivot shaft together to achieve close fitting between the two. After the silica gel protective layer (5) is torn off from the polytetrafluoroethylene tape layer (3), the side of the polytetrafluoroethylene tape layer (3) facing the electromagnetic wave absorbing layer (2) has adhesiveness. The side of the polytetrafluoroethylene tape layer (3) away from the electromagnetic wave absorbing layer (2) is a smooth plane, which is beneficial to reducing the contact friction force and improving the sliding assistance, without affecting the normal use of the pivot shaft, and the laptop can be opened and closed smoothly. Designing the size of the polytetrafluoroethylene tape layer (3) to be larger than that of the double-sided self-adhesive layer (1) and the electromagnetic wave absorbing layer (2) is more beneficial to increasing the area of the smooth plane. The polytetrafluoroethylene tape layer (3) exceeding the sizes of the double-sided self-adhesive layer (1) and the electromagnetic wave absorbing layer (2) can also be bonded to the pivot shaft to improve the adhesiveness.

2. The anti-reflection and wave-absorbing film for pivot shaft according to claim 1, wherein The thickness of the double-sided self-adhesive layer (1) is 10 μm.

3. The anti-reflection and wave-absorbing film for pivot shaft according to claim 1, characterized in that, The thickness of the electromagnetic wave absorbing layer (2) is 25 - 50 μm.

4. A sliding-assisting and wave-absorbing film for a pivot shaft according to claim 1, wherein The thickness of the polytetrafluoroethylene tape layer (3) is 50 - 70 μm.

5. A sliding assist and wave-absorbing film for a pivot shaft according to claim 1, characterized in that, The thickness of the propylene flame retardant tape layer (4) is 52 - 83 μm.

6. The anti-reflection and wave-absorbing film for pivot shaft according to claim 1, characterized in that, The thickness of the silica gel protective layer (5) is 55 - 65 μm, the thickness of the silica gel layer (7) is 10 μm, and the thickness of the isolation film layer (8) is 47 - 53 μm.

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