Composite electromagnetic shielding sheet and electronic device

Abstract

The utility model relates to the technical field of electromagnetic shielding, and specifically discloses a composite electromagnetic shielding sheet and an electronic device, the composite electromagnetic shielding sheet comprises a wave absorbing layer, a bonding glue layer, an aluminum foil layer and a bonding assembly, the wave absorbing layer is arranged on one side of the bonding assembly, the bonding glue layer is arranged on one side of the wave absorbing layer far away from the bonding assembly, and the aluminum foil layer is arranged on the bonding assembly. The aluminum foil layer is arranged on the side, away from the adhesive layer, of the adhesive layer, and through the arrangement, the problem that an existing electromagnetic shielding material is poor in electromagnetic shielding effect is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electromagnetic shielding, especially to a composite electromagnetic shielding sheet and electronic device. BACKGROUND

[0002] Electromagnetic radiation is the transmission of momentum and energy in the form of waves in space by co-directional oscillation and perpendicular electric field and magnetic field, and its propagation direction is perpendicular to the plane formed by the electric field and the magnetic field. With the wide application of electronic devices, electromagnetic radiation has become an increasingly serious environmental problem. Electromagnetic radiation not only harms human health, but also causes safety problems such as electromagnetic interference and electromagnetic leakage.

[0003] In order to reduce the harm caused by electromagnetic radiation, electromagnetic shielding materials are needed to limit electromagnetic waves in a specific area, thereby reducing the impact on the external environment and equipment. At the same time, by limiting the propagation range of electromagnetic waves, the safety and confidentiality of information during transmission can be ensured.

[0004] However, the existing electromagnetic shielding materials, although can reflect and absorb electromagnetic waves by using high conductivity, have poor shielding effect on electromagnetic waves. SUMMARY

[0005] The utility model aims at providing a composite electromagnetic shielding sheet and electronic device, which aims to solve the technical problem that the existing electromagnetic shielding materials, although can reflect and absorb electromagnetic waves by using high conductivity, have poor shielding effect on electromagnetic waves.

[0006] To achieve the above-mentioned purpose, the utility model adopts a composite electromagnetic shielding sheet, which comprises a wave-absorbing layer, an adhesive layer, an aluminum foil layer and an adhesive assembly. The wave-absorbing layer is arranged on one side of the adhesive assembly. The adhesive layer is arranged on the side of the wave-absorbing layer away from the adhesive assembly. The aluminum foil layer is arranged on the side of the adhesive layer away from the adhesive layer.

[0007] The adhesive assembly comprises a PT layer and a single-sided adhesive layer. The non-adhesive surface of the single-sided adhesive layer is in contact with the wave-absorbing layer, and the adhesive surface of the single-sided adhesive layer is in contact with the PT layer.

[0008] The composite electromagnetic shielding sheet further comprises a pull block and two anti-slip pads. The pull block is fixedly connected with the PT layer and located on the side of the PT layer away from the single-sided adhesive layer. The two anti-slip pads are both fixedly connected with the pull block and respectively located on the two sides of the pull block.

[0009] The composite electromagnetic shielding sheet further comprises a protective layer, which is arranged on the side of the aluminum foil layer away from the adhesive layer.

[0010] The utility model also provides an electronic device, including the composite electromagnetic shielding sheet as above-mentioned.

[0011] The utility model discloses a composite electromagnetic shielding sheet, when using specifically, after stirring and mixing even solvent, dispersing agent, wave absorbing agent, colloid and thickening agent, obtain wave absorbing material slurry, then through using coating machine, scrape and coat wave absorbing material slurry on the sticky component, then carry out high temperature processing, obtain the wave absorbing layer, then use the brush gum machine and evenly brush a layer of the bonding adhesive layer on the surface of wave absorbing layer, then through the back gum machine, back the aluminum foil layer on the wave absorbing layer, finally after heat treatment, the bonding adhesive layer solidification makes wave absorbing layer and aluminum foil layer closely bond together, form composite electromagnetic shielding film material, then through the sticky component, stick the composite electromagnetic shielding sheet on the device that needs electromagnetic shielding, can solve the electromagnetic wave interference and shielding of device, through the combination of the electromagnetic shielding performance of aluminum foil layer and the high -efficient wave absorbing performance of wave absorbing layer, thereby greatly promoted the shielding effect to electromagnetism, by this method can effectively solve the existing electromagnetic shielding material, although can utilize high conductivity nature to reflect and absorb electromagnetic wave, but the shielding effect of electromagnetism is not good. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, below will be to the drawings needed to be used in the embodiment or prior art description simple introduction, obviously, the drawings in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, still can obtain other drawings according to these drawings.

[0013] Figure 1 It is the structure schematic diagram of the utility model.

[0014] 101-wave absorbing layer, 102-bonding adhesive layer, 103-aluminum foil layer, 104-PT layer, 105-single-sided adhesive layer, 106-pull block, 107-non-slip pad, 108-protection layer. DETAILED DESCRIPTION

[0015] The embodiments of the utility model will be described in detail below, the example of the embodiment is shown in the drawings, the embodiment described below through the reference drawings is exemplary, and it is used to explain the utility model, and can not be understood as the limitation of the utility model.

[0016] Please refer to Figure 1 , Figure 1 It is the structure schematic diagram of the utility model.

[0017] The utility model provides a kind of composite electromagnetic shielding sheet, including wave-absorbing layer 101, bonding glue layer 102, aluminium foil layer 103 and sticking assembly, the sticking assembly includes PT layer 104 and single-sided adhesive layer 105, the composite electromagnetic shielding sheet further include pull block 106 and two anti-skid pads 107, the composite electromagnetic shielding sheet further include protective layer 108, the foregoing scheme solves the existing electromagnetic shielding material, although it can be reflected and absorbed with high electrical conductivity to electromagnetic wave, but the shielding effect of electromagnetism is not good Problem.

[0018] For this specific implementation, the wave-absorbing layer 101 is disposed on one side of the sticking assembly, the bonding glue layer 102 is disposed on the side of the wave-absorbing layer 101 away from the sticking assembly, and the aluminium foil layer 103 is disposed on the side of the bonding glue layer 102 away from the bonding glue layer 102. In actual use, the solvent, dispersing agent, wave-absorbing agent, colloid and thickening agent are stirred and mixed uniformly to obtain a wave-absorbing material slurry. Then, the wave-absorbing material slurry is scraped and coated on the sticking assembly using a coating machine. Then, high-temperature treatment is performed to obtain the wave-absorbing layer 101. After that, a layer of the bonding glue layer 102 is evenly brushed on the surface of the wave-absorbing layer 101 using a glue brushing machine. Then, the aluminium foil layer 103 is attached to the wave-absorbing layer 101 using a back glue machine. Finally, after heat treatment, the bonding glue layer 102 solidifies, causing the wave-absorbing layer 101 and the aluminium foil layer 103 to be tightly bonded together to form a composite electromagnetic shielding film material. Then, the composite electromagnetic shielding sheet is attached to the device that needs electromagnetic shielding through the sticking assembly, which can solve the electromagnetic interference and shielding of the device. By combining the electromagnetic shielding performance of the aluminium foil layer 103 and the high-efficiency wave-absorbing performance of the wave-absorbing layer 101, the shielding effect of electromagnetism is greatly improved.

[0019] In the single-sided adhesive layer 105, the non-sticking surface is in contact with the wave-absorbing layer 101, and the sticking surface is in contact with the PT layer 104. In actual use, a layer of the single-sided adhesive layer 105 is attached to the PT layer 104 using a back glue machine. The sticking surface of the single-sided adhesive layer 105 is in contact with the PT layer 104 and is bonded to the PT layer 104. The single-sided adhesive layer 105 is resistant to high temperature and can be peeled off from the PT layer 104.

[0020] Secondly, the pull block 106 is fixedly connected with the PT layer 104 and located on the side of the PT layer 104 away from the single-sided adhesive layer 105, both of the anti-skid pads 107 are fixedly connected with the pull block 106 and respectively located on both sides of the pull block 106, and when in use, the pull block 106 is pulled to drive the one end of the PT layer 104 to move downwards, so that the PT layer 104 is separated from the single-sided adhesive layer 105, and the friction of the pull block 106 is enhanced by the two anti-skid pads 107.

[0021] Meanwhile, the protective layer 108 is arranged on the side of the aluminum foil layer 103 away from the adhesive layer 102, and when in use, the aluminum foil layer 103 is protected by the protective layer 108, so that the service life of the composite electromagnetic shielding sheet is improved.

[0022] The utility model also provides an electronic device comprising the composite electromagnetic shielding sheet.

[0023] The composite electromagnetic shielding sheet of the embodiment is used in the following manner: after the solvent, dispersing agent, wave-absorbing agent, colloid and thickening agent are stirred and mixed uniformly, a wave-absorbing material slurry is obtained, a single-sided adhesive layer 105 is coated on the PT layer 104 by using a back adhesive machine, the adhesive surface of the single-sided adhesive layer 105 is in contact with the PT layer 104, then the wave-absorbing material slurry is scraped and coated on the single-sided adhesive layer 105 by using a coating machine, and then high-temperature treatment is performed, so that a multilayer film comprising the PT layer 104, the single-sided adhesive layer 105 and the wave-absorbing layer 101 is obtained, then an adhesive layer 102 is uniformly brushed on the surface of the wave-absorbing layer 101 by using a brush adhesive machine, then the aluminum foil layer 103 is coated on the wave-absorbing layer 101 by using a back adhesive machine, and finally, after heat treatment, the adhesive layer 102 is solidified, the wave-absorbing layer 101 and the aluminum foil layer 103 are tightly bonded together, a composite electromagnetic shielding film material is formed, then the pull block 106 is pulled to drive the one end of the PT layer 104 to move downwards, so that the PT layer 104 is separated from the single-sided adhesive layer 105, the adhesive surface of the single-sided adhesive layer 105 is exposed, and then the single-sided adhesive layer 105 is attached to a device requiring electromagnetic shielding, so that the electromagnetic interference and shielding of the device are solved, the electromagnetic shielding performance of the aluminum foil layer 103 and the high-efficiency wave-absorbing performance of the wave-absorbing layer 101 are combined, so that the shielding effect of electromagnetic waves is greatly improved, and the existing electromagnetic shielding material can be effectively solved, although the high-conductivity property can be used to reflect and absorb electromagnetic waves, but the shielding effect of electromagnetic waves is not good.

[0024] The above disclosed is only a preferred embodiment of the utility model, of course, cannot with this to limit the utility model right scope, the person skilled in the art can understand that the whole or part processes of the above embodiment are realized, and the equivalent change made according to the utility model claim still belongs to the range covered by the utility model.

Claims

1. A composite electromagnetic shielding sheet, characterized in that, It includes an absorbing layer, an adhesive layer, an aluminum foil layer, and an adhesive assembly. The absorbing layer is disposed on one side of the adhesive assembly, the adhesive layer is disposed on the side of the absorbing layer away from the adhesive assembly, and the aluminum foil layer is disposed on the side of the adhesive layer away from the adhesive layer.

2. The composite electromagnetic shielding sheet as described in claim 1, characterized in that, The adhesive component includes a PT layer and a single-sided adhesive layer. The non-adhesive side of the single-sided adhesive layer is in contact with the microwave absorbing layer, and the adhesive side of the single-sided adhesive layer is in contact with the PT layer.

3. The composite electromagnetic shielding sheet as described in claim 2, characterized in that, The composite electromagnetic shielding sheet also includes a pull block and two anti-slip pads. The pull block is fixedly connected to the PT layer and is located on the side of the PT layer away from the single-sided adhesive layer. The two anti-slip pads are fixedly connected to the pull block and are located on both sides of the pull block.

4. The composite electromagnetic shielding sheet as described in claim 3, characterized in that, The composite electromagnetic shielding sheet also includes a protective layer, which is disposed on the side of the aluminum foil layer away from the adhesive layer.

5. An electronic device, characterized in that, Includes the composite electromagnetic shielding sheet as described in any one of claims 1-4.

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