Conductive foam with electromagnetic shielding function

Abstract

The utility model discloses conductive foam with an electromagnetic shielding function, and relates to the technical field of conductive foam, in particular to the conductive foam with the electromagnetic shielding function. The conductive foam comprises a conductive foam body, the conductive foam body is a cylinder, the conductive foam body is of a three-layer hot-pressing structure, and the conductive foam body is formed by sequentially hot-pressing a foam base material layer, a conductive layer and an electromagnetic shielding layer from inside to outside; a groove is formed in one end face of each conductive foam body, a clamping block is arranged on the other end face of each conductive foam body, every two adjacent conductive foam bodies are connected through the grooves and the clamping blocks, and the clamping blocks are clamped in the grooves; the foam base material layer is filled with one of polyurethane foam and silica gel foam, the polyurethane foam is preferentially selected, and the foam base material layer accounts for 50-70% of the total mass of the conductive foam body. The electromagnetic shielding cable is light in weight, soft, high in plasticity and excellent in electromagnetic shielding effect, and can solve the problems in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of conductive foam, in particular to a conductive foam with electromagnetic shielding function. Background Art

[0002] Conductive foam is a special foam with conductive properties that can effectively prevent electromagnetic interference. It has a wide range of uses, mainly including the following aspects: Conductive foam can be used in electronic products, automobiles, construction and other fields to effectively reduce electromagnetic radiation and protect human health; Conductive foam can be used in optoelectronics, microelectronics, aviation, aerospace and other high-tech enterprises. As a new type of antistatic material, its electrostatic protection performance is permanent and has no dependence on environmental humidity; Conductive foam can also be used in turnover, storage, transportation, packaging and other fields that require buffering and shock absorption, such as televisions, mobile phones, medical instruments and other electronic products, as well as military and aerospace fields. Conductive foam is widely used in various fields due to its special conductive properties and excellent physical properties, bringing many conveniences to our lives and work.

[0003] With the development of science and technology, electronic products have become an indispensable part of people's lives. However, electronic products will generate electromagnetic radiation during use, which has a negative impact on human health. Therefore, how to effectively reduce electromagnetic radiation has become an urgent problem to be solved. At present, most of the electromagnetic shielding materials on the market are relatively hard, heavy, and difficult to process, and cannot meet the shielding needs of various complex shapes. Therefore, it is necessary to propose a conductive foam with electromagnetic shielding function to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a conductive foam with electromagnetic shielding function in view of the defects and shortcomings of the prior art. The conductive foam is light, soft, highly plastic and has excellent electromagnetic shielding effect, which can solve the problems raised by the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a conductive foam with electromagnetic shielding function, which includes a conductive foam body 1, the conductive foam body 1 is a cylinder, the conductive foam body 1 is a three-layer hot-pressed structure, and the conductive foam body 1 is formed by hot pressing a foam substrate layer 2, a conductive layer 3 and an electromagnetic shielding layer 4 from the inside to the outside.

[0006] One end surface of the conductive foam body 1 is provided with a groove 1-1, and the other end surface of the conductive foam body 1 is provided with a snap-fit ​​block 1-2. Two adjacent conductive foam bodies 1 are connected via the groove 1-1 and the snap-fit ​​block 1-2, and the snap-fit ​​block 1-2 is snapped into the groove 1-1.

[0007] The foam substrate layer 2 is filled with one of polyurethane foam and silicone foam, preferably polyurethane foam, and the foam substrate layer 2 accounts for 50-70% of the total mass of the conductive foam body 1. The foam substrate layer 2 is made of a foam material with high elasticity and high toughness. The foam substrate serves as the basic structure of the conductive foam and provides good elasticity and toughness for the entire conductive foam.

[0008] The conductive layer 3 is filled with metals such as copper, aluminum, nickel or their oxides, preferably copper, and the mass of the conductive layer 3 accounts for 10-30% of the total mass of the conductive foam body 1. The conductive layer 3 is made of metal or metal oxide material with excellent conductive properties, and the conductive material is combined with the foam substrate to make the entire conductive foam have excellent conductive properties.

[0009] The electromagnetic shielding layer 4 is filled with magnetic powder, and the mass of the electromagnetic shielding layer 4 accounts for 20-40% of the total mass. The electromagnetic shielding layer is combined with the foam substrate and the conductive material to achieve effective shielding of electromagnetic radiation.

[0010] Working principle of the utility model: the foam substrate layer provided in the utility model makes the material of the conductive foam very light, which can effectively play a conductive effect, and at the same time has low impedance and is not dependent on environmental humidity; the electromagnetic shielding layer provided has an excellent electromagnetic shielding effect, which can effectively shield the interference of external electromagnetic waves, thereby protecting the normal operation of electronic products; the provided conductive layer makes the utility model have good conductive properties, and can be easily fixed on the device to be shielded with adhesive tape; through the groove of the conductive foam body and the clamping block of another conductive foam body, 2 or more conductive foams can be quickly spliced, so that conductive foams of various sizes can be provided to meet the requirements of devices of various sizes to be shielded.

[0011] After adopting the above technical scheme, the beneficial effects of the utility model are as follows: the conductive foam with electromagnetic shielding function described in the utility model has a reasonable structural design, not only has excellent electromagnetic shielding and conductive properties, but also has good flexibility and corrosion resistance, can solve the problems raised by the background technology, is suitable for being widely used in various electronic products, and provides effective electromagnetic interference protection and electrostatic protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 It is a side sectional view of the utility model;

[0014] Figure 2 It is a schematic diagram of the structure of two conductive foams spliced ​​together in the utility model.

[0015] Description of the reference numerals: conductive foam body 1 , groove 1 - 1 , snap-fit ​​block 1 - 2 , foam substrate layer 2 , conductive layer 3 , electromagnetic shielding layer 4 . DETAILED DESCRIPTION

[0016] See also Figure 1-2 As shown, the technical solution adopted in this specific embodiment is: a conductive foam with electromagnetic shielding function, which includes a conductive foam body 1, the conductive foam body 1 is a cylinder, one end face of the conductive foam body 1 is provided with a groove 1-1, the other end face of the conductive foam body 1 is provided with a snap-fit ​​block 1-2, two adjacent conductive foam bodies 1 are connected by the groove 1-1 and the snap-fit ​​block 1-2, and the snap-fit ​​block 1-2 is snapped into the groove 1-1; the conductive foam body 1 is a three-layer hot-pressed structure, and the conductive foam body 1 is formed by hot-pressing a foam substrate layer 2, a conductive layer 3 and an electromagnetic shielding layer 4 in sequence from the inside to the outside; the foam substrate layer 2 is filled with one of polyurethane foam and silicone foam, polyurethane foam is preferably selected, and the foam substrate layer 2 accounts for 50-70% of the total mass of the conductive foam body 1. The foam substrate layer 2 is made of a foam material with high elasticity and high toughness. The foam substrate serves as the basic structure of the conductive foam and provides good elasticity and toughness for the entire conductive foam. The conductive layer 3 is filled with metals such as copper, aluminum, nickel or their oxides, preferably copper. The mass of the conductive layer 3 accounts for 10-30% of the total mass of the conductive foam body 1. The conductive layer 3 is made of a metal or metal oxide material with excellent conductive properties. The conductive material is combined with the foam substrate to make the entire conductive foam have excellent conductive properties. The electromagnetic shielding layer 4 is filled with magnetic powder, and the mass of the electromagnetic shielding layer 4 accounts for 20-40% of the total mass. The electromagnetic shielding layer is combined with the foam substrate and the conductive material to achieve effective shielding of electromagnetic radiation.

[0017] This specific embodiment provides a conductive foam with electromagnetic shielding function. The conductive foam body is formed by hot pressing three layers, namely, a foam substrate layer, a conductive layer and an electromagnetic shielding layer, from the inside to the outside. The foam substrate layer is filled with one of polyurethane foam and silicone foam, the conductive layer is filled with metals such as copper, aluminum, nickel or their oxides, and the electromagnetic shielding layer is filled with magnetic powder. The utility model not only has excellent electromagnetic shielding and conductive properties, but also has good flexibility and corrosion resistance. It is suitable for being widely used in various electronic products to provide effective electromagnetic interference protection and electrostatic protection.

[0018] The above description is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A conductive foam with electromagnetic shielding function, characterized in that: It comprises a conductive foam body (1), the conductive foam body (1) is a cylinder, the conductive foam body (1) is a three-layer hot-pressed structure, and the conductive foam body (1) is formed by hot-pressing a foam substrate layer (2), a conductive layer (3) and an electromagnetic shielding layer (4) in sequence from the inside to the outside.

2. The conductive foam with electromagnetic shielding function according to claim 1, characterized in that: One end surface of the conductive foam body (1) is provided with a groove (1-1), and the other end surface of the conductive foam body (1) is provided with a snap-fit ​​block (1-2); two adjacent conductive foam bodies (1) are connected via the groove (1-1) and the snap-fit ​​block (1-2), and the snap-fit ​​block (1-2) is snap-fitted into the groove (1-1).

3. The conductive foam with electromagnetic shielding function according to claim 1, characterized in that: The foam substrate layer (2) is filled with polyurethane foam, and the foam substrate layer (2) accounts for 50-70% of the total mass of the conductive foam body (1).

4. The conductive foam with electromagnetic shielding function according to claim 1, characterized in that: The conductive layer (3) is filled with copper, aluminum, nickel or oxides thereof, and the mass of the conductive layer (3) accounts for 10-30% of the total mass of the conductive foam body (1).

5. The conductive foam with electromagnetic shielding function according to claim 1, characterized in that: The electromagnetic shielding layer (4) is filled with magnetic powder, and the mass of the electromagnetic shielding layer (4) accounts for 20-40% of the total mass.

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