Testing & Quality Control

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Published: 8/26/2020

Quantifying the Appearance of Plastics
Gloss, reflection haze, and transmission haze are three of the most prevalent effects on the appearance of plastics. With the help of multifunctional tools like gloss meters and spectrophotometers manufacturers can measure these visua...

Published: 12/1/2019

Materials Knowledge Pays Off at Teel Plastics
Well-equipped and well-staffed testing lab elevates competence of custom processor.

Published: 9/1/2019

K 2019 Preview: Blow Molding Exhibits Focus on Recycling & PET
Spotty information from blow molding machinery exhibitors indicates that the “Circular Economy” will be a recurrent theme and that PET processing will predominate.

Published: 5/1/2019

Part Two: Determining Viscosity Data Using a Slit Die Viscometer
Using a slit-die viscometer connected to a lab extruder can generate accurate data on melt viscosity at various shear rates and different temperatures—a useful QC tool in processing.

Published: 5/1/2019

Part 5: Heat Deflection Temperature vs. Dynamic Mechanical Analysis
In the final part of this five-installment series, we bring DMA to a practical level using the results for glass-filled nylon.

Published: 4/1/2019

Part 4: Heat Deflection Temperature vs. Dynamic Mechanical Analysis
The presentation of DMA data can sometimes frustrate users and discourage its adoption. Those unfamiliar with DMA should insist on receiving data relevant to the manner in which the part they are developing will be used.

Published: 3/13/2019

PART ONE How to Determine Viscosity Data Using a Slit-Die Viscometer
Using a slit-die viscometer connected to a lab extruder can generate accurate data on melt viscosity at various shear rates and temperatures, a useful QC tool in processing.

Published: 3/11/2019

Heat Deflection Temperature vs. Dynamic Mechanical Analysis (Part 3)
DMA provides a rich and detailed picture of polymer performance, and it can be challenging to understand all the things that we can and should know about our materials. But the fact that it may be hard does not mean that it should not be attempted.

Published: 2/1/2019

PART 2 Heat Deflection Temperature vs. Dynamic Mechanical Analysis
Here’s a real-world example of a part failure demonstrating why DMA curves have more value than single-point data generated by HDT.  

Published: 1/1/2019

Part 1: Heat Deflection Temperature vs. Dynamic Mechanical Analysis
Does the industry need a better way of reporting the temperature-dependent behavior of plastics? With DMA, it already has one. But it’s been glacially slow to catch on.