ʻO PTFE (polytetrafluoroethylene), aka polymer, ʻo ia ka polymer koho mua loa no nā bellows a me nā diaphragms, akā ua ʻike anei ʻoe ʻaʻole ʻo PTFE wale nō ka polymer āu e koho ai?Ma kēia ʻatikala e hoʻohālikelike mākou i ʻelua polymers ʻē aʻe - PFA a me TFM - i ka PTFE ma ke ʻano he koho waiwai no nā bellows a me nā diaphragms.
PFA
ʻO PFA, a i ʻole Perfluoroalkoxy, i kapa ʻia i kekahi manawa he polymer PFA.Loaʻa iā ia nā waiwai e like me ka PTFE, me ka resistivity kemika koʻikoʻi a me ka haʻahaʻa haʻahaʻa haʻahaʻa.ʻAʻole ia he hydrophobic e like me PTFE, akā naʻe, a ʻoi aku ka nui o ka wai.ʻO kahi kumu e koho ʻia ai ma luna o ka PTFE ʻo kona hiki ke mālama i kona ikaika mechanical i nā wela kiʻekiʻe, ʻoiai ke hui pū ʻia me nā kemika caustic.Loaʻa iā ia nā mea kolo maikaʻi loa, nā waiwai luhi a me ke kūpaʻa wela.ʻO 260°C kāna lawelawe mau loa i ka mahana.
ʻOi aku ka maʻalahi o ka PFA i ka wā e hiki ai ke hana ʻia nā ʻāpana;no ka laʻana, hāʻawi maikaʻi ʻo ia iā ia iho i ka extrusion, ka hoʻoheheʻe ʻana, ka hoʻololi ʻana, ka hoʻoheheʻe ʻana, a me ka hoʻoheheʻe ʻana.E ʻike pinepine ʻoe i ka PFA i hoʻohana ʻia no nā lako palaki palaki ma muli o kona ʻano kūlohelohe kemika, a ʻo kona maʻalahi ua lilo ia i koho kaulana no ka paipu i nā noi kemika.He mea kaulana no ka semiconductor a me nā noi lāʻau.
TFM
Ua lohe paha ʻoe no TFM, a i ʻole PTFE-TFM.ʻO TFM ka lua o ka hanauna PTFE e loaʻa ana kahi mea hoʻololi hou i kapa ʻia ʻo Perfluoro (propyl vinyl ether).Hoʻololi kēia mea hoʻololi i kona ʻano polymer ma mua o ka PTFE, e hoʻohaʻahaʻa ana i kāna permeability kinoea ma lalo o ka PTFE akā ʻaʻole haʻahaʻa e like me ka PFA.ʻO ka mānoanoa pā like o TFM he pālua ka hopena pale e like me PTFE.Hoʻohālikelike ʻia kona ʻai wai me ka PTFE, maikaʻi loa.E like me ka PFA, hana maikaʻi ia ma nā wela kiʻekiʻe a he mea kemika loa.Hoʻopili maikaʻi ʻia ʻo TFM i nā noi e hoʻohui i nā mahana kiʻekiʻe me nā vacuums.E like me PFA, hana maikaʻi ia no nā lāʻau lapaʻau a me nā noi semiconductor.
Ke hoʻohālikelike ʻia me PTFE, ʻoi aku ka maikaʻi o nā hiʻohiʻona o ka ʻili, ʻoi aku ka ʻoi aku o ka ʻoi aku ka maʻalahi o ka kolo a ua hoʻomaikaʻi i nā waiwai luhi.Ke hoʻohālikelike ʻia me PTFE, hōʻike pū ʻo ia i ka hoʻihoʻi hou ʻana i ke kaumaha.ʻO 250°C ka wela o ka lawelawe mau loa, aia ma lalo iki o PFA.
Koho Polimer
ʻO kēia mau koho polymer ʻelua he mau koho maikaʻi loa no nā noi maʻemaʻe kiʻekiʻe, me ka lāʻau lapaʻau, pharma, semiconductor bellows.No laila, i ka manawa aʻe e koho ai ʻoe i ka polymer bellows a i ʻole diaphragm, mai poina ʻaʻole ʻo PTFE wale nō kāu mea koho.
Ka manawa hoʻouna: Apr-11-2018