Styrene is a clear, colourless liquid which is also used in thousands of everday products and is present in many foodstuffs such as coffee, strawberries and beans.
i. Pre-expansion: The tiny spherical beads are expanded to about 40 times their original size using 5% pentane as a blowing agent. The beads are heated by a flow of steam causing the blowing agent to boil and so form the honeycomb of closed cells.
ii. Maturing: When the steam ceases, the recently expanded particles form an internal semi-vacuum which must be compensated for by air diffusion. The pre-foamed material is left to stand for around 12 hours.
iii. Final forming: The stabilised pre-expanded beads are again subjected to steam so that they bind together. This can be in block form, which is later cut by hot wires to the required dimensions, or moulded into pre-determined product-specific shapes.
The controlled burning of EPS at a high temperature, produces emissions so low that they have less impact on the environment than your average garden bonfire.
EPS is non-hygroscopic - it does not readily absorb or retain moisture from the atmosphere. EPS permits moisture to pass out of a building, resulting in a healthier property with a better internal environment.
This indicates the material's thermal conductivity - its ability to conduct, or permit, heat to pass through it. This is indicated by the measure W / mk.
Sundolitt EPS has an extremely low thermal conductivity value.
My company is interested in your raw material. Can we purchase it in the UK?
Sales of Sunde expandable polystyrene granules are handled in Norway by Ørvar Tollås our Export Manager. To contact him, go to Sundolitt / Contact Us / Sunde Sales or e-mail him on - orvar.tollas@sunde.no
Yes we do. We have a very modern and progressive facility in Norway which works closely with EPS specialists and with our customers, in all of our markets, to develop new and improved EPS products.
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Technical
What is styrene?
Styrene is a clear, colourless liquid which is also used in thousands of everday products and is present in many foodstuffs such as coffee, strawberries and beans.
