Optimizing Purging Compounds Based on Melt Flow Index

Jason Bishop

Jason Bishop brings more than 30 years of plastics engineering experience with deep expertise in tool and part design, resin selection, and process optimization. His technical background covers injection molding, extrusion, multi-shot molding, insert molding, and advanced process engineering. Jason has a proven record of managing complex programs and successfully leading cross-functional teams through product launches, consistently driving innovation and results. Since joining the Purgex team in 2025, Jason has applied his extensive technical knowledge to support customers with both sales and hands-on training. He works directly with processors to demonstrate effective purging practices, helping them reduce downtime, improve changeover efficiency, and maximize productivity.

A pair of engineers performing quality control on products

Optimizing Purging Compounds Based on Melt Flow Index

TL;DR: This article explains how the melt flow index (MFI) directly impacts purging compound performance, machine cleanliness, and production efficiency. Readers will learn how understanding polymer flow behavior can help reduce contamination, minimize scrap, and improve changeovers across injection molding, extrusion, and blow molding operations. Ask any process engineer what separates a smooth changeover from […]

An automotive factory assembly line.

Purging Compounds for Automotive Parts: Are They Worth It?

TLDR: In the fast-paced world of automotive manufacturing, every minute counts—and so does every part. Working with injection molding machines/hot runner systems or blow molding applications? Efficiency and precision are everything. For many manufacturers, purging compounds for automotive parts are a smart solution to reduce contamination, improve part consistency, and extend equipment life. But are they worth […]