High-temperature-resistant high-resilience electromagnetic shielding conductive foam and preparation process thereof

Abstract

The invention discloses high-temperature-resistant high-resilience electromagnetic shielding conductive foam and a preparation process thereof. The electromagnetic shielding conductive foam comprisesa base material layer and a metal-plated polyimide film layer wrapping the surface of the base material layer, the metal-plated polyimide film layer comprises a polyimide film layer with the inner surface attached to the surface of the base material layer, and the inner surface of the polyimide film layer is attached to the surface of the base material layer; a first metal coating is compounded onthe outer surface of the polyimide film layer, a copper coating is compounded on the outer surface, away from the polyimide film layer, of the first metal coating, and a second metal coating is arranged on the outer surface, away from the first metal coating, of the copper coating. Compared with a traditional electromagnetic shielding device, the conductive foam is better in high temperature resistance, better in elasticity, lower in resistivity and better in electromagnetic shielding effect, and particularly, the conductive foam can be welded to a circuit board or a circuit board through theSMT technology, so that the problem that manpower is consumed by manual attachment is solved, the labor cost is reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of conductive foam, in particular to a high-temperature resistant high-resilience electromagnetic shielding conductive foam and a preparation process thereof. Background technique [0002] In modern life, a series of electronic products such as mobile phones and computers have become an indispensable part of people, and the harm of electromagnetic radiation to the human body has also become the focus of attention, so the demand for high-energy electromagnetic shielding devices is also increasing. [0003] At present, the relevant electromagnetic shielding parts on the market are mainly processed by metal foil, fabric shielding material, conductive material, etc., and wrapped in foam to play the role of conductive shielding and shock resistance. Among them, the preparation of metal foil is difficult, easy to wrinkle, and has a high density; fabric shielding materials cannot be rubbed, stretched, washed, etc.;...

AI Technical Summary

Problems solved by technology

Among them, the preparation of metal foil is difficult, easy to wrinkle, and has a high density; fabric shielding materials cannot be rubbed, stretched, washed, etc.; conductive coatings are easily oxidized, and are easy to settle during transportation and storage

After the above materials are made into electromagnetic shielding devices, they need to be manually pasted into electronic products for application, and automatic placement cannot be achieved, which not only consumes manpower, but also has low efficiency

Images