Firewall FRB is a
premium grade twin wall board made with a block-copolymer
polypropylene resin in a unique Coroplast® flame inhibiting
Printing on Flame Resistant Board
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.
Firewall FRB is corona treated full width on both surfaces.
Corona treatment is needed for all printing applications.
Technical Bulletin CSS-006 "Screen Printing Inks" for
additional information on printing on Coroplast It is
recommended that ink tests be performed prior to production
also improves the performance of most adhesives.
Fabrication with Coroplast Flame Resistant Board
Firewall FRB boards can be die cut or slit on standard
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. Die cutting and creasing becomes easier as
temperature increases. Recommended die cutting and creasing
Coroplast® lame resistant board at room temperature or
warmer for optimum performance.
information on fabricating with Coroplast Firewall FRB
boards please refer to Coroplast technical bulletin CSS-005
General Conversion Information.
static charge during handling. This build-up becomes most
evident during screen printing or converting.
Firewall FRB boards have a static-free additive which
minimizes the build-up by quickly dissipating the charge.
The static-free additive requires moisture in the air:
therefore, the more moisture in the air the better the
Firewall FRB boards can be cleaned with soap and water and
most solvents without affecting the sheet properties or
additional information on Coroplast resistance to solvents.
is resistant to dings and punctures.
Coroplast® Firewall FRB
Displays, Trade show booths, heat exchange media,
construction, temporary walls
General properties of the copolymer polypropylene resin used
in Firewall FRB is contained in CoroplastTechnical
UL Test Procedures
Test Method: Two
10-second applications of a 3/4 inch Bunsen flame to a
vertical piece of 1/2 inch wide plastic. The total burn time
of both applications is added together. Test is repeated 10
Flame extinguishes self within 25 seconds per test strip.
Drips are allowed to ignite cotton.
FRB extinguishes within 5 seconds. V-0 criteria requires
flame extinguish within 5 seconds: however, drips can no