Sources of Plastic (Polypropylene)

Hello Community,

for research on my project, I would like to gather information on sources of Polypropylene.
I have been using PP from cleanups, but that is not very reliable and takes a long time to collect and clean.
hence, if anybody has a different solution, it would be great to share here!

Questions:
-which kind of companies currently uses and waste a lot of PP?
-which industries?
-does anybody use recycled PP and has experience with the supply?

Thanks for your contributions!

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