Bayer Plastics: Formable EMI/RFI films use conductive ink

Formable polycarbonate films that incorporate EMI/RFI shielding capability have been developed by Bayer Plastics together with Acheson Colloids Co. Shielding is imparted to Makrofol and Bayfol PC films by printing them with Acheson’s conductive ink (Electrodag SP-405) or by dispersing the ink into a coextruded cap layer on the sheet. The sheet can be used for film insert molding (FIM), whereby the formed shielding is inserted in an injection mold and melt is injected behind it. This approach is said to be more cost-effective than conductive paints or coatings for use in cellular phones, laptop computers, and automotive or medical parts.

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