What are polypropylene plastics?

What are polypropylene plastics? What is an example of polypropylene? Polypropylene is most commonly used for plastic moldings, wherein it is injected into a mold while molten, forming complex shapes at relatively low cost and high volume; examples include bottle tops, bottles, and fittings. How can you tell if plastic is polypropylene? The colour of … Continue reading What are polypropylene plastics?