ITW Formex announced Formex GK, an improved formulation of polypropylene
electrical insulation with enhanced structural integrity and ability to be
scored and folded into three-dimensional parts, giving it advantages over fish
paper and aramid paper, as well as other thermoplastic insulators. In addition,
Formex GK offers higher dielectric strength and a higher temperature rating
than original Formex.
Formex GK provides electrical insulation between circuit
boards and housings to prevent contact with unintended conductors. In addition,
Formex GK electrical insulation serves as a physical barrier that protects
consumers and service workers from exposure to energized components and shields
sensitive electronic components.
Formex GK can be die-cut, scored, and folded, allowing for
easy fabrication into low-cost, durable, three-dimensional parts, something
that alternative technologies are not capable of doing. Parts fabricated from
Formex GK are cost-effective replacements for injection molded or fabricated
sheet-metal parts used inside electrical equipment. Formex GK reduces tooling
and fabricating costs, and because Formex parts can be shipped and stored flat,
freight and warehousing costs are reduced as well.
Compared to aramid paper and fish paper, Formex GK
electrical insulation is more moisture resistant (moisture absorption
<0.06%), has a higher dielectric strength, and has superior dimensional
stability. Often these advantages enable thinner insulation to be used, thereby
saving weight and space and reducing manufacturing costs. Formex GK also has
exceptional chemical resistance particularly when compared to polycarbonate.