Quote:
Originally Posted by Paul Copioli
It is possible to mix in additives to make PP very ductile. I am certain this is what Pneuaire has done. PP is desirable because it is used for many approved devices for use in food handling equipment. The Pneuaire tanks are also FDA approved.
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Out of curiosity, on what basis or with what information are you concluding that Pneuaire tanks have more additives / are made more ductile than the Clippers tanks?
Is it the lack of reports on cracks / failures developing from over tightening fittings?
I would be interested to see the difference in data from tensile specimens machined from all three tanks (white and black Clippards, and Pneuaire tanks).
Here are some Ashby Plots on a variety of unfilled PP polymers with different additions for UV resistance, flame resistance, clarity, etc. This doesn't include second phase additives like carbon fibers, glass fill, talc, etc.
Tensile Strength and % Elongation
Fracture Toughness and Young's Modulus
