ʻO ka PTFE (polytetrafluoroethylene) hana: kūpono no ka ʻōnaehana wai a me nā mea hoʻoheheʻe organik like ʻole, kūpaʻa i nā mea hoʻoheheʻe āpau, haʻahaʻa haʻahaʻa. Loaʻa iā ia nā hiʻohiʻona o ka ea permeability a me ka wai impermeability, ka nui o ka ea flux, ka nui o ka paʻa ʻana o ka ʻāpana, ka pale wela maikaʻi, ke kūʻē i nā waikawa ikaika, alkalis, nā mea hoʻoheheʻe organik a me nā oxidants, kūʻē i ka wā kahiko, non-stickiness, non-flammability, non-toxicity, a me biocompatibility. Hoʻohana nui ʻia kāna mau huahana pili i ka kemika, lāʻau lapaʻau, palekana kaiapuni, uila, meaʻai, ikehu a me nā māla ʻē aʻe.