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Published: 9/22/2014

MATERIALS: Don’t Guess Your Way through Root Cause Analysis: Part 2
The huge chasm between the laboratory and manufacturing discipline usually does not lend itself to problem-solving. It can be improved with clear communication between the analysis laboratory and the people bringing the problem to the lab.

Published: 8/25/2014

MATERIALS: Don’t Guess Your Way Through Root Cause Analysis
More than 50 different polymer test techniques can be used to find root causes of problems. Of these, five or six are fairly common. Use them to take the guesswork out of why a product failed.

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: 4/23/2014

MATERIALS: Melt Flow Rate Testing—Part 10
Two areas where the melt flow rate test it is not useful are related to processing.

Published: 3/21/2014

Melt Flow Rate Testing—Part 9
Understanding the value of melt-volume rate.

Published: 1/23/2014

Melt Flow Rate Testing—Part 7
Here is why the melt flow test is not universal.

Published: 12/29/2013

Melt Flow Rate Testing—Part 6
Once degradation has been established, the discussion inevitably turns to how it happened. It might be expected that the answer to this question is widely known. Not so. The good news is that the influences that cause polymer degradation during proc...

Published: 11/26/2013

Melt Flow Rate Testing—Part 5
There are two points in the manufacturing supply chain where a determination of average molecular weight (MW) is important. The first is when the material is first received by the molder. The second is after molding.

Published: 10/24/2013

Melt Flow Rate Testing—Part 4
Few molders perform the test in-house. Of those that do, most don't understand why they are doing it or what they are measuring.