Treating cavitated polymeric films with plasma at atmospheric pressure

摘要

A method is provided for surface treating a polymeric film. The film may be biaxially oriented and includes void spaces or cavities in a thermoplastic polymer matrix. The surface treatment involves contacting at least one surface of the film with plasma at atmospheric pressure and at a temperature below the melting point of the thermoplastic polymer of the matrix material. This method makes the treated surfaces more hydrophilic.