Composite plate with electromagnetic shielding and antistatic effects and production process

Abstract

The invention discloses a composite plate with electromagnetic shielding and antistatic effects and a production process, the product is formed by combining a metal foil (or net) 1, a glass fibrous body 2, a flame-retardant and conducting paste layer 3, a color overlay layer 4 and flame-retardant and heat-resistant adhesive, and the production process comprises eight steps, namely (1) selecting and preparing materials, (2) making sheet stocks, (3) impregnating the paste layer, (4) preparing semi-finished products, (5) aging processing, (6) curing molding, (7) in-mold coloring and (8) warehousing finished products. The composite plate is a glass-fiber fabric reinforced sandwiched metal foil (or net) composite plate which is molded by impregnating and pressing unsaturated polyester, which has good electromagnetic shielding function, polymerized substance on the surface layer is doped with conducting particles and conducting fiber, thus forming a permanently antistatic working surface of the electric resistivity between 105ohm and 109ohm, the longitudinal tensile strength and the transverse tensile strength are higher than that of an aluminum alloy plate and are equivalent to that of a stainless steel plate, the excellent flame retardancy can achieve UL94 to V0 grade, and the composite plate can be used as inner decoration of a machine room of precise microelectronic equipment. When the color is coated on the surface, no solvent is contained, and the color coating is in synchronization with mold pressing, compared with coating paint after molding, the production process is energy-saving and environmental-friendly, and selection of the layer material is various and free, thus meeting the demands of various environments and having wide market prospect.

Description

technical field [0001] The invention belongs to the technical field of composite materials, in particular to a composite material with electromagnetic shielding and antistatic performance. Background technique [0002] With the advancement of electronic technology and electronic equipment, the side effects of electromagnetic waves and static electricity on electronic equipment and human health need to be treated urgently. At present, the large-scale construction of railway passenger dedicated lines is booming, which puts forward new and higher requirements for system equipment such as communication signals, train control, dispatching and commanding. However, a large number of microelectronic devices used in these system equipment are vulnerable to the threat of electromagnetic interference, and it is imminent to improve the electromagnetic shielding and antistatic performance of electronic equipment in signal systems. [0003] At present, the common electromagnetic shieldin...

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Problems solved by technology

Since it is used as a decorative board, it must meet the color requirements of light weight, high strength, flame retardancy, and coordination between the outer surface and the interior layout. Composite boards that meet the above comprehensive properties have not been reported yet.

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