I am just curious as I want to build a filament extruder.
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The most realistic materials to reuse for 3d printing would be PET and HIPS. PET is used for all kinds of beverage bottles, and HIPS is used in a lot of packaging.
PLA is not particularly common for product packaging. It exists, but you’re not likely to regularly get enough to extrude and spool up. You’re more likely to find it in already reusable products like rigid water bottles.
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I guess you never heard of cPLA 😉
PLA is not used in any food related packaging because it’s not food safe
A simple google search would show you’re wrong
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