Assertion: polypropylene | /r/ObjectUse | used as an engineering plastic
Facets:
Source sentences:
text: This allows polypropylene to be used as an engineering plastic, competing with materials such as acrylonitrile butadiene styrene (ABS).
text: So it can be used as engineering plastics.
text: This allows polypropylene to be used as an engineering plastic, competing with materials such as ABS.