A method of film fabrication is taught that uses a coating and drying apparatus to fabricate resin films suitable for optical applications. In particular, polyvinyl butyral films are prepared by simultaneous application of multiple liquid layers to a moving carrier substrate. After solvent removal, the...http://www.google.es/patents/US7012746?utm_source=gb-gplus-sharePatente US7012746 - Polyvinyl butyral films prepared by coating methods
Polyvinyl butyral films prepared by coating methods
