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  1. Polypropylene - Wikipedia

  2. Is Polypropylene Safe and BPA Free? - Healthline

  3. Polypropylene | Properties, Definition, & Uses | Britannica

  4. Polypropylene (PP) - Types, Properties, Uses & Structure - Omnexus

  5. Find out What Polypropylene Is and What It's Used For

  6. What Polypropylene Plastics Are and How They're Used

  7. Polypropylene: Properties, Processing, and Applications - Matmatch

  8. Polypropylene | Formula, Properties & Application

  9. Polypropylene - Wikiwand

  10. Polypropylene (PP) | What Is It, Types, Properties, and Uses