ポリフッ ふっかビニリデンでしょう
pori fukka biniridendeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of ポリフッ化ビニリデン

1. Polyvinylidene fluoride, likely.; Probably PVDF.

Polite
Presumptive
Conjecture