What Went Wrong?
An injection molded polypropylene part used in a conveyor application was experiencing cracking near the knitline of parts produced from a gray masterbatch resin. No cracking was observed in similar parts produced from a pre-compounded gray resin. All parts were manufactured in the same press/tool and similar process parameters were used for each resin type… [Download to continue reading…]
Knitline Failure Analysis
