Polystyrene Insulation Thermal Properties

Insulation r values of various materials.

Polystyrene insulation thermal properties.

Extruded polystyrene thermal insulation boardwill not corrode or decay over time celfort 300 foamular 400 600 and 1000 are type 4 closed cell thermal insulating foams can ulc s701 01 supercedes can cgsb512 0 m87. Sizes and thermal properties celfort and foamular high density insulation boards are available in a variety of thicknesses. Achieve more than 23 better thermal insulating properties. This is quantified through the r value of the two materials or thermal resistance which is an approximate measurement of how much the material impedes the transfer of heat.

Typical thermal conductivity values for expanded polystyrene are between 0 030 and 0 040w m k. Grey polystyrene foam incorporating graphite has superior insulation properties. Technonicol company specialists have developed a unique technology for producing extruded polystyrene slabs with nanoscale carbon particles. In general thermal insulation is primarily based on the very low thermal conductivity of gases.

The mostly used insulant in civil engineering is the white polystyrene. Polystyrene is a great thermal insulator and can achieve excellent r value ratings at a given thickness for eps and even higher ratings for xps. The new generation are grey insulating boards that thanks to the content of infrared absorbents graphite particles. For contact thermal insulating systems we use façade polystyrenes marked by the grade f.

Gases possess poor thermal conduction properties compared to liquids and solids and thus makes a good insulation material if they can be trapped e g. Xps polystyrene foam is more effective due to its dense structure and excellent moisture resistance. Extruded polystyrene xps is one of the most efficient thermal insulation materials which is widely used in the construction of foundations basements floors walls roofs pipelines roads and railways. Expandable polystyrene either crystal polystyrene 2 or styrene copolymers soaked with a blowing agent usually pentane are used to produce various foamed products like disposable drinking cups egg cartons trays fast food containers cushioned packaging and thermal insulation for the construction market.

The thermal conductivity of expanded polystyrene foam of density 20 kg m 3 is 0 035 0 037 w m k at 10 c. 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. Polystyrene foams are good thermal insulators and are therefore often used as building insulation materials such as in insulating concrete forms and structural insulated panel building systems.