Exploring the: Polyolefins Zone

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Published: 3/29/2018

Materials: A Processor’s Most Important Job, Part 4
Engineering polymers require higher mold temperatures to achieve their ideal structure. The temptation to turn down the mold temps can hurt part performance.

Published: 10/18/2016

The Importance of Oxidative Stability in Polyolefins, Part 3
Tools and methods for determining oxidative stability can be useful, but even more useful if constructed to yield the information you really need.

Published: 9/27/2016

The Importance of Oxidative Stability In Polyolefins, Part 2
The DSC test can do a reasonably good job of capturing the comparative behavior of materials that use similar antioxidant chemistries.

Published: 8/24/2016

Are You Ready for K 2016?
We’ve got you covered with five feature stories and an entire new-products section devoted to the October show in Dusseldorf.

Published: 8/24/2016

MATERIALS: The Importance of Oxidative Stability in Polyolefins
Because oxidation is a process that causes materials to deteriorate over time, its effects or potential for those effects are not always apparent when new products are tested.

Published: 7/28/2014

MATERIALS: Performance in Polyethylene: Density Matters: Part II
Remembering the case of the failed gas tanks.

Published: 6/19/2014

MATERIALS: Performance in Polyethylene: Density Matters
In polyethylene, density provides another mechanism to control properties. But it must be specified properly.

Published: 6/24/2013

Melt Flow Rate Testing–Part 1
Though often criticized, MFR is a very good gauge of the relative average molecular weight of the polymer. Since molecular weight (MW) is the driving force behind performance in polymers, it turns out to be a very useful number.

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: 1/5/2011

Resin Buying Strategies - November 2010 Year-End Tabs Flat or Slightly Higher
Except for PP, prices of commodity resins bumped upward in November.