Raven Industries Inc.'s Engineered Films division is expanding its film production capacity and enhancing its converting capabilities with the acquisition of Integra Plastics Inc. Sioux Falls, S.D.-based Raven said in a news release that it purchased Integra, a privately held film and sheet manufacturer and converter, for about $48 million in cash and stock. Integra, which employs 118 and is based in Madison, S.D., will now conduct business under the Raven Industries' name.