Polypropylene (PP)
Injection molding is a effective processing technique for polypropylene materials. (RDC 9/22/2009)
Recent US Patents
10/19/2010
7,816,466
Propylene polymer composition for injection molding
Cagnani and Marzolla of Basell Poliolefine Italia, Italy developed a polypropylene consisting of 75 to 95 wt% ethylene propylene copolymer 0.5 to 3 mole% ethylene and or alpha olefins and 5 to 25 wt% polypropylene containing 25 to 45 mole% ethylene. (RDC 1/24/2011)
Recent Journal Articles
1/7/2011
Relating scratch resistance to injection molding-induced morphology of polypropylene
(141–147)Journal of Applied Polymer Science 120 #1 (2011)
Kobayashi et al, Japan found that the thickness of the frozen layer (which had low crystallinity) had the predominant effect on the scratch resistance in comparison to the polymorphism differences. (RDC 1/10/2011