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by jmiskovic 2359 days ago
This is the first time I hear of Precious Plastic. The community seems really positive, the site is awesome and professionally done (especially the map), the amount of content and already done tools is impressive.

The video and how-tos already give some ideas to produce (t-shape beams, geodesic dome connectors, wall sockets, bricks, carabiners...). I'd like to get a feel for limits and when it's not suitable to use. For example: how safe is it to have food in recycled plastic bowl, how much load can the t-beam hold, what's the melting point of brick, how much abuse the stool can take. Of course it depends on type of plastic used and probably pellet sizes and duration of extrusion. Can you give your opinion?

1 comments

There's a few reasons I wouldn't feel comfortable calling anything made of recycled plastic food safe, but my biggest is from the huge variety of additives that go into products. These don't necessarily play nice with the remelt process. We did do some work on making your own bowls and the like from bio materials though. [0]

When it comes to mechanical properties, they don't change very much as long as you're creating a consistent material with your melt. The t-beam question comes back to basic physics calculations using elastic modulus and allowable stresses of whatever plastic goes into it.

[0] https://community.preciousplastic.com/academy/research/beyon...