Know-How - Materials

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Published: 6/26/2012

When It Comes to Nylon, Don’t Do the Math
Chemistry is seldom as simple as it looks. Polymer chemistry takes the complexity up a notch. Nylon chemistry is about much more than doing the math.

Published: 5/29/2012

Density & Molecular Weight in Polyethylene
This so-called 'commodity' material is actually quite complex, making selecting of the right type a challenge.

Published: 4/26/2012

Biopolymers: Time to Take A Deep Breath
Are we looking at all of the implications associated with developing this new 'crop' of polymers?

Published: 3/26/2012

Working with Color Concentrates
Industry needs more development of enhanced-mixing screws.

Published: 2/21/2012

Working with Color Concentrates
Perhaps the greatest difficulty involving the use of color concentrates is specifying them appropriately for the material to which they are being added.

Published: 1/28/2012

Working with Color Concentrates
Because the consumer sees so many colored plastic articles, it is natural to assume that the process of achieving molded-in color is a simple one. Those of us in the industry know differently.

Published: 12/27/2011

Low-Cost Processing, Long-Term Problems
You can't cut your way to prosperity.

Published: 11/28/2011

The Importance of Melt & Mold Temperature
Molders should realize how significantly process conditions can influence the final properties of the part.

Published: 10/25/2011

The Effects of Stress
Previously we have discussed the effects of temperature and time on the long-term behavior of polymers. Now let's take a look at stress.

Published: 9/30/2011

The Strain Rate Effect
The rate of loading for a plastic material is a key component of how we perceive its performance.