Know How - Extrusion

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Published: 9/10/2020

Understanding the Effect of Polymer Viscosity on Melt Temperature
Every processor should get hold of the viscosity curves for the polymers they use or contemplate using in their operations, and learn how to read them.

Published: 8/31/2020

Extrusion: Evaluating Screw Design for Multi-Material Recycling
Since many plastic products are made of a combination of materials with very different melting points, careful consideration must be given to designing screws when it comes time to recycle these products.

Published: 7/20/2020

Extrusion: 'Melt-Blown' Fiber: What You Need to Know to Enter the Face Mask Market
Coronavirus pandemic has made extrusion processors curious about entering the face-mask market. But melt-blown fiber is very different from most other extrusion processes and requires specialized equipment.

Published: 6/12/2020

Extrusion: The Importance of Zone 1 Barrel Temperature
Tweaking the temperature settings of the first barrel zones may not yield the desired result. In fact, they may yield the opposite. Here’s why.

Published: 5/28/2020

What You Should Know About Miniature Extrusion Screws
Very small screws have become more common with the growth of additive manufacturing. Designing such screws requires balancing their output requirements with their torque strength.

Published: 4/10/2020

Extrusion: Important Polymer Melting Equations for Extrusion Processors
The more you know about what happens in a screw, the more you’ll be able to work with your supplier to optimize design.

Published: 3/25/2020

Try This Lower-Cost Purging Method
You might be able to reduce purging times and save money by scheduling processing jobs in order of the increasing material viscosity. But to get started, you'll need shear rate/viscosity curves for your polymers.

Published: 3/17/2020

How to Optimize Usage of Recycled Material
Processors need to “engineer” feeding properties similar to virgin pellets into their regrind to efficiently and economically utilize more of their scrap.