Spun PP has been around for ages. It degrades quickly with exposure to UV and heat. It's almost impossible to use in a molded application due to the heat issue. I read about this in the composites world blurb, <a href="http://www.compositesworld.com/news/high-modulus-pp-fibers-make-waves-in-the-surfboard-industry.aspx" target="_blank">here</a> the recommendation is a cover layer of glass over graphics and my guess is the graphics are what offer the UV protection. <BR> <BR>Spun PP offers better wet out than Extruded PP. I guess that I'm not sure what the advantage is if you're having to cover with a layer of glass anyway...I guess strength, but if you're using a 1 oz that you have to cover with something like 4 oz top and bottom and completely paint it, you've probably given up the weight advantage. <BR> <BR>Interesting stuff, though.
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