Styrofoam is the trade name of a range of blue extruded polystyrene foam insulation boards originally developed and marketed by the dow chemical company in the early 1940 s.
Extruded polystyrene foam properties.
Extruded polystyrene xps rigid foam insulation owens corning foamular 250 extruded polystyrene xps rigid foam insulation is a closed cell highly moisture resistant rigid foam board well suited to meet the needs for a wide variety of residential and commercial construction applications.
Thermal efficiency insulating power the thermal efficiency of an insulating material is expressed as r value.
Styrofoam brand scoreboard extruded polystyrene foam insulation is an extruded polystyrene foam insulation board that is scored longitudinally on 16 and 24 centers making it easy to size to commonly used widths cut and install.
Celfort and foamular extruded polystyrene insulation boardsare suitable for all types of high strength construction applications the boards are lightweight durable and impact resistant which helps to reduce job site damage foam insulation can be scored and fabricated easily with common hand tools.
Performance properties of extruded polystyrene foam xps insulation in general the physical properties of xps products are best characterized by using the material standard for rigid cellular polystyrene foams.
Astm c578 standard specification for rigid cellular polystyrene thermal insulation addresses the physical properties and performance characteristics of eps foam as it relates to thermal insulation in construction applications.
The products are organized left to right in ascending compressive strength.
Extruded polystyrene xps foam and expanded polystyrene eps foam.
The thermal conductivity of expanded polystyrene foam of density 20 kg m 3 is 0 035 0 037 w m k at 10 c.
Carl munters and john gudbrand tandberg of sweden received a us patent for polystyrene foam as an insulation product in 1935 usa patent number 2 023 204.
Unlike expanded polystyrene eps styrofoam is manufactured via a continuous extrusion process.
Grey polystyrene foam incorporating graphite has superior insulation properties.
Foamular extruded polystyrene xps insulation astm c578 types and physical properties this table outlines the basic physical property requirements of astm c5781 and foamular xps insulation compliance.
Astm standard c 578 08b.
Although both types of insulation are comprised of polystyrene the two types of manufacturing processes produce finished products with very different performance properties.
Because the foam board is extruded rather than poured into molds like eps foam board the thickness of the xps product is limited.
There are two types of polystyrene foam best suited for processing with the hot wire foam cutters and hot knife cutters.
