Ask the Extrusion Expert: Your plastics and processing questions, answered


Allan Griff, independent consulting engineer and plastics extrusion expert, has agreed to extend his relationship with PlasticsToday. Already the host of our well-received Extrusion Expert webinar series, Allan now also authors this column. The formula is simple: readers send questions; Allan chooses the best or most intriguing and answers them.

Our aim is that this column becomes the leading source of extrusion and plastics information on the web. Have a plastics extrusion question for Allan? Send it to him at We will not publish your name or company name unless you expressly ask us to do so, but also will not accept anonymous questions as this opens the opportunity for a supplier to send a "baiting" question for which the answer might highlight his products.

If you would like to watch the taped versions of Allan's previous webinars, simply register for them here; you also can download the slides....
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