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+--- Forum: Plastics & Composites (http://www.metalworkingfun.com/forum-42.html)
+--- Thread: RECYCLE PLASTIC BAGS INTO USABLE PLASTIC SHEETS (/thread-3912.html)
RECYCLE PLASTIC BAGS INTO USABLE PLASTIC SHEETS - Dr Stan - 07-10-2018
http://www.instructables.com/id/Recycle-Plastic-Bags-Into-Usable-Plastic-Sheets/?utm_source=newsletter&utm_medium=email
RE: RECYCLE PLASTIC BAGS INTO USABLE PLASTIC SHEETS - Vinny - 07-10-2018
You can also use those bags to make machinable wax.
RE: RECYCLE PLASTIC BAGS INTO USABLE PLASTIC SHEETS - Highpower - 07-10-2018
So why is it that they say plastic straws can't be recycled?
They have been talking about doing away with plastic straws all together on the news for days now, in favor of paper straws or better yet, preferring that you don't use straws at all!
RE: RECYCLE PLASTIC BAGS INTO USABLE PLASTIC SHEETS - Dr Stan - 07-17-2018
It depends on what type of plastic is used to make the straws. I don't have a clue anyone else happen to know?
RE: RECYCLE PLASTIC BAGS INTO USABLE PLASTIC SHEETS - pepi - 07-18-2018
0.39 into that video I see a huge waste of time. Just have much more going on to do, much less even think about that kind of thing.
The web/utube is loaded with that type of frankly nonsense, that has zero value. I'm going back to something really exciting, continuing the work of painting the interior trim.
Bigger reward ........... longer lasting.
Pep
RE: RECYCLE PLASTIC BAGS INTO USABLE PLASTIC SHEETS - rleete - 07-25-2019
(07-10-2018, 12:01 PM)Highpower Wrote: So why is it that they say plastic straws can't be recycled?
They have been talking about doing away with plastic straws all together on the news for days now, in favor of paper straws or better yet, preferring that you don't use straws at all!
It's all in the shape. Because they are long and thin, they can pass through a typical plastic shredder nearly intact. Instead of having a bin full of nicely chopped plastic chips, you now have a mix of chips and straws. This means it won't melt evenly, and the non melted parts can clog the extruder. So, they screen out the bigger chunks, and even that doesn't catch all the straws. The tiny coffee stirrers are even worse.
Because of the shape, they are also harder to wash before shredding, meaning debris/waste can get mixed in with the plastic. It doesn't take much foreign material to ruin an entire batch of plastic, especially if it gets mixed in and put into the extruders. Lots of work to take them apart and clean the clogs.
I worked at a place that molded plastic parts for cars. They try to shred and reuse all the small trimmings, but there are some pieces that are a real pain to reuse.
Edit: most straws (as far as I know, anyway) are polypropylene. Same stuff as gallon milk jugs here in the US.