Firewall FRB is recognized by Underwriter's Laboratory as UL94v-2 in standard gauges and colors. Printing on Flame Resistant Board Coroplast Firewall FRB is made with polypropylene copolymer, a nonabsorbent material, and requires inks formulated for this type of product. Recommended solvent based screen printing inks formulated for Coroplast should be used for best appearance and adhesion. Improved UV and water-based inks are becoming available. Coroplast Firewall FRB is corona treated full width on both surfaces.
Corona treatment is needed for all printing applications.
It is recommended that ink tests be performed prior to production of parts. Corona treatment also improves the performance of most adhesives. Fabrication with Coroplast Flame Resistant Board Coroplast Firewall FRB boards can be die cut or slit on standard conversion equipment. Coroplast Firewall FRB boards have a higher mineral content than regular Coroplast board due to the flame inhibiting additives package. Higher mineral content usually increases stiffness and decreases flexibility which may require adjustments to die cutting equipment to maintain optimum performance.