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Case Studies

Knitline Failure Analysis

The Problem
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.

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The Madison Group

The Madison Group is the recognized leader in plastics engineering. Over three decades, The Madison Group has focused on polymeric materials. We understand how these materials behave, how to properly design with them, how they are processed, and the numerous manufacturing steps required to produce a successful product.