Abstract:

This paper presents a statistical analysis of the research and development landscape for biaxially oriented polypropylene （BOPP） capacitor films. The study examines the number and trends in patent applications， the overall patent landscape， sources and geographical distribution of technologies， legal statuses， and technology development pathways. The analysis offers insights into the industrial development of BOPP capacitor films， with a specific emphasis on the evolution of Toray Industries’ patent portfolio and its strategic approaches to patent protection in this field.

Key words: bidirectionally stretched polypropylene, capacitor film, patent analysis, patent distribution, patent protection strategy