polypropylene

/pol-ee-proh-puh-leen/US // ˌpɒl iˈproʊ pəˌlin //UK // (ˌpɒlɪˈprəʊpɪˌliːn) //

聚丙烯,聚丙稀,聚乙烯,聚氯乙烯

Definitions

n.名词 noun

1
Chemistry.
- : a plastic polymer of propylene,n, used chiefly for molded parts, electrical insulation, packaging, and fibers for wearing apparel.

Because they are made of polypropylene, most paints will chip off.
To boost viability, Coates and colleagues created a highly potent compatibilizer for polyethylene and polypropylene.
They suggest wearing a cloth mask with two tightly woven layers and a filter made out of a type of plastic called polypropylene in between.
It also comes with three disposable filters made from non-woven polypropylene—the same stuff that’s in some reusable bags—that serve as a third layer of protection.
Existing worldwide supplies of the melt-blown polypropylene used in the most coveted PPE item in hospitals—the N95 respirators capable of filtering out the virus—are spoken for through at least the first few months of 2021.