ʻO PP-R, MT05-400L (RP340R) he polypropylene random copolymer me ka wai maikaʻi, hoʻohana nui ʻia i ka hoʻoheheʻe ʻana. Loaʻa iā RP340R nā hiʻohiʻona o ke aniani kiʻekiʻe, ke aniani kiʻekiʻe, ke kūpaʻa wela kiʻekiʻe, a me ka paʻa o ka nui o ka injection. Ua hala ka huahana YY/T0242-2007medical ho'āʻo a me GB 4806.6-2016 meaʻai a me ka lāʻau ho'āʻo hana.