EPS (Expanded Polystyrene) is a CLOSED cell material.
EPS is made up of Hydrogen and Carbon atoms with the addition of a blowing agent (Pentane) used only in the manufacturing process. The blowing agent dissipates as the material cures.
R-Values and Compressive strengths increase with density.
Tests have shown that when burned, EPS is no more toxic than wood or paper burning. The by-product of burning EPS is Carbon Monoxide.
Maximum Temp exposure to EPS should not be higher than 167 degrees F for extended periods, nor higher than 184 degrees F at any time.
EPS will not support bacterial or fungus growth. EPS has no food value.
Flame Spread & Smoke Developed Ratings vary slightly depending on Raw Material manufacturer.
***** As a general rule, Flame spread is 15 and Smoke Developed is 150 to 250.
Expanded Polystyrene (EPS) products are produced and distributed by Hendren Plastics, Inc. in a variety of shapes and sizes for numerous uses. These include Packaging, Insulation and Flotation.
|Nominal||pcf||1 #||1.25 #||1.5 #||2 #|
|R Value||25 F||per inch||4.2||4.4||4.6||4.8||R Values indicate the resistance to the transfer of heat.|
|75F||3.6||3.8||4||4.2||The higher the R Value, the higher the resistance.|
|K Factor||40F||BTU/(hr)||0.24||0.235||0.22||0.21||K Factors are not used or asked for very often. They deal with|
|75F||(sqft)(F/in)||0.26||0.255||0.24||0.23||the Thermal Conductivity of insulation.|
|Compressive||psi||10||13||15||25||Multiply the #'s by 144 to find pounds per sq foot|
|Strength @ 10% deform.||These weights will compress the material approx 10%|
|Flexural||psi||25||30||40||50||Multiply the #'s by 144 to find pounds per sq foot|
|Water Vapor||max perm||5||3.5||3.5||2||Shows air moisture transfer through EPS|
|Water||% by Vol||4||3||3||2||Maximum amount of water absorbed in % of volume|
|Bouyancy||lb/cuft||60||60||60||60||lbs/cuft to push EPS just below water surface.|
|Allow at least 50% safety factor|
|Other data also||available on request:|
|Tensile Strength||Dimensional Stability|
|Shear Strength||Bond Strength|
|Shear Modulus||Sound Absorption|
|Modulus of Elasticity||Coeffecient of Thermal Expansion|