Fishpaper and aramid paper are not always the best choices for electrical
insulation. Alternative materials have characteristics that can reduce cost and improve design performance. Unlike fishpaper, which is made of cellulose, and aramid paper,
which is made of aramid fiber, Formex™ polypropylene electrical insulation is non-hygroscopic insulation (moisture absorption <0.06%). This means
Formex retains its structural integrity and dimensional stability even in the most demanding outdoor applications unlike typical insulation paper.
Formex also has greater dielectric strength than fishpaper and aramid paper enabling thinner sheets of insulation material to be used in an application thereby saving cost and weight.
Most importantly, Formex, is easily scored and folded into durable three-dimensional parts providing the ability to replace molded and sheet metal parts such as air-flow
baffles, battery covers, and wire harness organizers with a lightweight, low-cost, flame-retardant material.