Flame Retardant Specialty Fiberboard
Windsor Steven’s E-FR is an Underwriter’s Laboratories approved flame retardant specialty fiberboard, multi-ply constructed from unbleached Kraft pulp. The UL 94 Flammability Classification is 94V-0.
E-FR has good mechanical strength, punchability and foldability.
E-FR is available in sheets, strips, rolls and slit coils in thicknesses from .010” and above.
|Fiber Content||100% Unbleached Kraft Wood Pulp|
|Moisture Content||7.0% Avg.|
|Standard Thickness, ± 7%||Inches||.010||.015||.020||.025||.031|
|Apparent Density, (Air Dry), ± 7%||g/cc||1.10||1.10||1.10||1.10||1.10|
|Weight, (Air Dry), ± 7%||lbs./sq. ft.||.057||.086||.114||.148||.177|
|Tensile Strength, (Avg.)||MD lbs./In.||140||250||340||370||550|
|Burst Strength, (Avg.)||lbs./sq. in.||110||170||250||300||475|
|Tear Strength, (Avg.) grams||MD||215||380||600||800||800|
|Dielectric Strength, Air, AC, 25˚C-50% RH||total volts||2000||3000||4000||5000||6000|
|Dielectric Strength, Air, AC, 24 hrs-95% RH||total volts||1600||1850||2500||3000|
Click here to download the E-FR Spec Sheet.
Click here to download the E-FR SDS Sheet.
“Values shown are typical, are not guaranteed, nor to be used for specifications without approval.”
NOTICE: The above information and data are believed to be accurate and reliable. Windsor Stevens assumes no responsibility for end-use applications and no performance warranty is expressed or implied.