Biaxial orientation increases strength and clarity.
2.
I'd say that biaxial orientation is destroyed when you heat / cool small pieces of PP using a toaster oven and a crushed aluminum can.
3.
The glass transition temperature of these polymers can exceed 200�C . COC resins are commonly supplied in pellet form and are suited to standard polymer processing techniques such as single and twin screw extrusion, injection molding, injection blow molding and stretch blow molding ( ISBM ), compression molding, extrusion coating, biaxial orientation, thermoforming and many others.
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