E-FR

Flame Retardant Specialty Fiberboard

General Description

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
CMD lbs./In. 35 60 90 105 110
 Burst Strength, (Avg.) lbs./sq. in. 110 170 250 300 475
 Tear Strength, (Avg.) grams MD 215 380 600 800 800
CMD 360 625 900 1000 1000
 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.