Materials Part 1: What Annealing Can Do for Your Process
Relatively rapid cooling rates in processing introduce internal stress. If functional problems in use result, annealing may draw down the stress to levels that may not be achievable during processing.
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Is It Glass Filled or Glass Reinforced?
Here is how to tell the difference.
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Polyethylene Fundamentals: Part 6 of 6
Don’t assume you know everything there is to know about PE because it’s been around so long. Here is yet another example of how the performance of PE is influenced by molecular weight and density.
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PBT and PET Polyester: The Difference Crystallinity Makes
To properly understand the differences in performance between PET and PBT we need to compare apples to apples—the semi-crystalline forms of each polymer.
Part 5 of 6: Fundamentals of Polyethylene
How the development of new catalysts—notably metallocenes—paved the way for the development of material grades never before possible.
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Part 4 of 6: Polyethylene Fundamentals
Injection molders of small fuel tanks learned the hard way that a very small difference in density—0.6%—could make a large difference in PE stress-crack resistance.
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Part 3 of 6: Fundamentals of Polyethylene
PE parts can fail when an inappropriate density is selected. Let’s look at some examples and examine what happened and why.
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Part 2 of 6: The Fundamentals of Polyethylene
PE properties can be adjusted either by changing the molecular weight or by altering the density. While this increases the possible combinations of properties, it also requires that the specification for the material be precise.
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Part 1 of 6: The Fundamentals of Polyethylene
You would think we’d know all there is to know about a material that was commercialized 80 years ago. Not so for PE. Let’s start by brushing up on the basics.
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PART 2: The Importance of Mold Temperature When Processing Polycarbonate
Don’t be afraid to increase mold temperature to improve part quality when making PC parts. Take a look at a few examples here.