<http://schema.org/description>
"&lt;p&gt;Multilayer film applications such as packaging and diapers are just two areas  that could benefit from spot welding (instead of gluing) polyethylene to polypropylene.  Normally these two resins show poor adhesion to each other. But two years of  research at the University of Minnesota in Minneapolis and at ExxonMobil Chemical  in Houston show that metallocene-catalyzed polyolefins can weld to each other  with bond strengths much greater than are possible with conventional Ziegler-Natta  catalyzed polyolefins.&lt;/p&gt;"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.ptonline.com/articles/metallocene-pp-pe-weld-strongly-to-each-other>