http://litian.shoutpost.com A ShoutPost ad-free blog. en-us Copyright by ShoutPost 2007 Wed, 30 Apr 2008 01:47:16 -0700 19 RSS 2.0 generation class http://blogs.law.harvard.edu/tech/rss http://www.shoutpost.com/read/litian/25187/eps-raw-material/ <p><strong>Polystyrene is a lightweight cellular plastic foam material composed of carbon and hydrogen atoms.</strong></p><p align="left">How is EPS Made?</p><p>EPS is produced in a three stage process:</p><p><strong>Pre-expansion</strong></p><p align="left">Upon contact with steam the pre-foaming agent found within the polystyrene beads (usually a hydrocarbon such as pentane) starts to boil and the beads are expanded to between 40 to 50 times their original volume. </p><p align="left"><stro ... http://www.shoutpost.com/read/litian/25187/eps-raw-material/ Wed, 30 Apr 2008 01:47:15 -0700 Litian's Blog