GSFR4 is constructed from a woven glass fabric with an epoxy resin binder. The epoxy resin system is flame retardant and typically contains bromine on the epoxy resin backbone. GSFR4 exhibits extremely high mechanical strength (flexural, impact, and bonding) at room temperature and has good dielectric loss and electric strength properties under both dry and humid conditions. 

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Applications:

• Printed circuit boards

• Insulators

• Jigs and other fixtures

• Medical diagnosis equipment

• Test boards

• Arc shields

• Screw terminal strips

• Relays

• Switches

• Rocket cases

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Grades:

• NEMA FR-4

• ASTM Grade FR-4

• MIL-I-24768/27 Type GEE-F

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fr4 Products