Company History
MICROPOROUS > ABOUT US > HISTORY
1934
American Rubber Company creates and patents the first rubber battery separator, Ace-Sil
1953
American Rubber Co. is acquired by Amerace Corp.
1971
Piney Flats facility becomes operational
1978
Amerace develops and patents Flex-Sil®
1991
Microporous Products, Inc.
(“Microporous”) name is first used
1999
Microporous creates and patents the CellForce® separator
2000
Microporous commissioned first dedicated production line to manufacture polyethylene separators in Piney Flats
2007
Microporous begins construction of a separator production facility in Feistritz, Austria
2008
Feistritz plant is commissioned
and starts production
2009
Piney Flats produces and sells DuroForce™ HD for the first time
2011
Feistritz facility reaches a global equivalent capacity of 40 million square
meters per year, with CellForce®, DuroForce™ Ultra, and DuroForce™ CL
2013
FTC approves acquisition of Microporous by Seven Mile Capital Partners, making Microporous an independent company again
2014
New management team is put in place, focusing on equipment improvement projects
2015
EnerSys Outstanding Supplier Performance Award 2015
2016
New capacity expansion – Feistritz installs new line to
produce CellForce® and DuroForce®
2018
Microporous Piney Flats
Expansion takes place
2019
Established global partnership for developing, manufacturing, and distributing AGM battery
separators
2020
Microporous Piney Flats new facility becomes operational
2024
Trent Capital Partners acquires full ownership of Microporous LLC, supporting the U.S. EV battery market with the development of ultra-thin, wet process PE coated lithium-ion battery separators
2024
Microporous breaks ground for their new ionForce®coated lithium-ion battery separator facility in Danville, VA.
2025Planned
Launch Microporous ionForce® coated lithium-ion battery separators production in Piney Flats, TN - First to produce ultra-thin, wet process PE coated lithium-ion battery separators in North America
2026Planned
Microporous ionForce® coated lithium-ion battery separator facility planned start of production, Danville, Virginia, creating over 2,000 jobs in Pittsylvania County