High-heat-radiation wave-absorption shielding film

Abstract

The invention discloses a high-heat-radiation wave-absorption shielding film. A third adhesive layer, a polypropylene film layer and a fourth adhesive layer are sequentially arranged between a wave-absorption layer and a release material layer of the shielding film; a plurality of convex points are arranged on the contact surfaces of the fourth adhesive layer and the release material layer; the wave-absorption layer is prepared from the following ingredients including 100 parts of wave absorption powder, 20 to 35 parts of butyl acrylate, 10 to 20 parts of acrylic acid, 20 to 35 parts of 2-ethylhexyl acrylate, 10 to 30 parts of methyl methacrylate, 1 to 3 parts of vinyl acetate, 0.1 to 1 part of methacrylate-2-HEA, 0.5 to 2 parts of polyacrylate sodium and 0.4 to 1 part of methyl ethyl ketone peroxide; the wave absorption powder is prepared from the following ingredients including 100 parts of carbonyl iron powder, 60 parts of nickel sesquioxide, 9 parts of nanometer graphite powder, 15parts of cobalt chloride, 62 parts of unsaturated polyester and 42 parts of sodium dodecyl benzene sulfonate. The high-heat-radiation wave-absorption shielding film is favorable for diffusing the heat generated by electromagnetic waves; the performance stability is improved; the service life of the product is prolonged.

Description

technical field [0001] The invention belongs to the technical field of electronic materials, and in particular relates to a high-radiation wave-absorbing shielding film. Background technique [0002] At present, metal sheets or nets widely used as shielding materials are heavy, and there is a problem that it takes labor and time to arrange them in the casing of the equipment. Furthermore, a metal sheet or mesh tends to have large anisotropy in electromagnetic wave absorbing ability, that is, the tendency for electromagnetic wave absorbing ability to significantly decrease as the incident angle of electromagnetic waves increases. The electromagnetic waves released by electronic products will bring electromagnetic interference to other electronic devices around them, making them work abnormally; at the same time, they will also cause harm to human health. At present, miniaturization and high integration are the mainstream trends in the development of electronic products, and ...

AI Technical Summary

Problems solved by technology

[0002] At present, metal sheets or nets widely used as shielding materials are heavy, and there is a problem that it takes labor and time to arrange them in the casing of the equipment.

In addition, metal sheets or meshes tend to have large anisotropy in the electromagnetic wave absorbing ability, that is, the tendency for the electromagnetic wave absorbing ability to decrease significantly when the incident angle of electromagnetic waves increases.

The electromagnetic waves released by electronic products will bring electromagnetic interference to other electronic devices around them, making them work abnormally; at the same time, they will also cause harm to human health