Superplastic alloy-containing conductive plastic article for shielding electromagnetic interference and process for manufacturing the same

A superplastic blowing process for manufacturing a plastic article for shielding electromagnetic interference, comprising the following sequential steps:

• (a) coating the surface of a superplastic alloy plate with a coupling agent by immersion or spraying;
• (b) sandwiching the coupling agent-coated superplastic alloy plate between plastic material to form a plastic/superplastic alloy/plastic composite plate or assembly structure;
• (c) in a mold, cooling and fixing the edges of the plastic/superplastic alloy/plastic composite plate or assembly structure;
• (d) as step (c) is being conducted, superplastically blowing the composite plate or assembly structure by blowing a gas at a superplastic temperature, such that the superplastic alloy is superplastically formed, and the whole composite plate or assembly structure is also formed by the superplastic forming of the superplastic alloy, to form a conductive plastic article for shielding electromagnetic interference,
• wherein the superplastic temperature is higher than the softening point of the plastic and lower than the melting point of the superplastic alloy, such that during superplastic forming at the superplastic temperature, the plastic is in the molten state, while the superplastic alloy is maintained in the solid state;
• and
• (e) removing the formed conductive plastic article for shielding electromagnetic interference from the mold,
• wherein the melting point of the superplastic alloy is higher than the softening point of the plastic, and the superplastic alloy has superplasticity at a temperature higher than the softening point of the plastic.