Polypropylene (PP) commendatur pro uno tempore tantum transmissionis vaporum humili. Polypropylene est rigida plastica quae translucet. In locus temperatus, polypropylene, optimam chemicam resistentiam acida, alcohols et bases exhibet. Polypropylene compatitur cum acetono, ethyl acetate, methanolo, alcohol isobutyl, methanolo, et ethyl ketone methyl. Polypropylene repugnat cum cyclohexano, aethere, dichlorobenzene, pentaneo, methyleno chloridi et trichlorobenzeno.