How to Build a 50K Ton Forging Press

Re:How to Build a 50K Ton Forging Press by jessebro on Thursday August 22, 2024 @09:19AM (#41319943)

HDPE is also what Nalgenes and the like are made of (or used to be anyway), and is very popular for storing chemicals as well. It is very nearly completely inert.

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Re:How to Build a 50K Ton Forging Press by kragen on Thursday August 22, 2024 @10:37AM (#41320777)

you cunninghammed me: nalgenes are polycarbonate, which is a lot less inert

all the polyethylenes are relatively inert, because polyethylenes are in some sense just heavy paraffins. paraffin is germanized latin for 'relatively inert'

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Re:How to Build a 50K Ton Forging Press by PuffinBlue on Thursday August 22, 2024 @12:45PM (#41322078)

And you have Cunninghammed me :-)

Some Nalgene's are polycarbonate, like those commonly drunk from. But not all, some are HDPE[0,1,2].

Some are Polypropylene co-polymer[3] but those are more for specialist things I guess.

[0] https://ultralightoutdoorgear.co.uk/ultralite-1-litre-wide-m... [1] https://www.cotswoldoutdoor.com/p/nalgene-hdpe-125ml-wide-mo... [2] https://www.elitemountainsupplies.co.uk/camping-trekking-c4/... [3] https://www.thelabwarehouse.com/products/bottle-nalgene-ppco...

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Re:How to Build a 50K Ton Forging Press by kragen on Thursday August 22, 2024 @06:13PM (#41324773)

oh, thanks! i only knew the pc ones

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Re:How to Build a 50K Ton Forging Press by zro on Thursday August 22, 2024 @03:28PM (#41323638)

The clear Nalgenes are polycarbonate, but the opaque ones (sold as "Ultralite Bottle" on their website) are made of HDPE

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