Hipore is a microporous polyolefin membrane separator placed between the anode and cathode of LIBs, which prevents contact between the electrodes while allowing Li ions to pass through. With increasing demand for hybrid-electric and all-electric vehicles worldwide, the LIB market is forecasted to grow substantially in automotive applications for the coming years, in addition to the mainstream applications for portable electronics including notebook computers and mobile phones.

Asahi Kasei E-materials is currently advancing a program of strategic expansion of its Hipore separator business, with production facilities in Moriyama, Shiga, and in Hyuga, Miyazaki. The new expansion will entail the addition of a fourth line in Hyuga, which, at 50 million m₂/year, will be the world’s largest single membrane separator line, according to the company. Upon completion, this new line will increase total Hipore capacity to more than 250 million m²/year.

Investment in the expansion is projected to be ¥6 billion (US$74.2 million).