Process for producing biaxially oriented PET films and use of the same for SMD-technology film capacitors

US6409862B1 · kind B1 · utility

Assignee

• Mitsubishi Polyester Film GmbH · US

Inventors

• Holger Kliesch · Ginsheim-Gustavsburg, DE
• Gottfried Hilkert · Saulheim, DE
• Rainer Kurz · Taunusstein, DE
• Franz Hora · Kriftel, DE
• Annegrete Bursch · Düsseldorf, DE

Key dates

• Filing date: Aug 27, 1999
• Grant date: Jun 25, 2002
• Expiry date: Aug 27, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2367/02
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Process for producing biaxially oriented PET film for use in film capacitors with SMD capabilities and its use for SMD-technology film capacitorsThe invention describes a process for producing a biaxially oriented film of thickness <10 &mgr;m, where a polymer melt is extruded through the gap of an extrusion die onto a chill roll, stretched longitudinally and transversely and relaxed longitudinally by >0.1% and transversely by >3%, where the edges of the film are held during the longitudinal and transverse relaxation and the film is wound up.