PTFE vs PFA

ʻO PFA, a i ʻole Perfluoroalkoxy, he ʻano fluoropolymer.Loaʻa iā ia nā waiwai like loa me ka polytetrafluoroethylene maʻamau (PTFE), ʻo ia ka ʻano polymer kaulana loa.Ua hāpai ʻia ʻo PFA e DuPont Co. a hāʻawi ʻia i ka inoa polymer PFA.ʻO ka mea e hoʻokaʻawale ai ia mai nā resins o PTFE ʻo ia ka PFA hiki ke hoʻoheheʻe ʻia.Hoʻokō ʻia kēia ma o ka hoʻoheheʻe ʻana maʻamau a me nā ʻenehana extrusion screw.

ʻO Polytetrafluoroethylene (PTFE), he fluoropolymer synthetic nō hoʻi o ka tetrafluoroethylene.ʻO DuPont Co. ka mea hana kaulana loa o PTFE, e like me ka mea i ʻōlelo ʻia ma mua, ʻo ia ka mea i ʻike nui ʻia e ka poʻe he polymer.Kūkulu ʻia mai ka loaʻa ʻole ʻana o Roy Plunkett, ʻo PTFE kahi pūhui kiʻekiʻe-molecular-kaumaha i loko o ke kalapona a me ka fluorine.ʻO ka mea nui, he paʻa fluorocarbon.ʻO ia ka hydrophobic, ʻo ia hoʻi ka wai a i ʻole nā ​​​​mea i loko o ka wai hiki ke pulu ma muli o ke ʻano o ka fluorocarbon e hoʻemi i nā pūʻali hoʻopuehu o Lākana.No laila, loaʻa iā PTFE kahi koena haʻahaʻa haʻahaʻa o ka friction i ka wā e pili ana me nā mea paʻa.Loaʻa kēia ma muli o ka electronegativity kiʻekiʻe o ka fluorine.Ma waho aʻe o ka polymer, kapa ʻia ʻo PTFE ʻo Fluon a me Syncolon.

ʻO ka olytetrafluoroethylene (PTFE) he fluoropolymer synthetic o ka tetrafluoroethylene he nui nā noi.

ʻO ka Perfluoroalkoxy alkanes (PFA) he copolymer o ka hexafluoropropylene a me nā perfluoroethers. ʻO kekahi hana PFA i ʻike nui ʻia he polymer PFA.

Ua like loa ka PFA me ka PTFE, ʻoiai ʻo ka ʻokoʻa nui loa ma waena o PTFE a me PFA ʻo ia ka hoʻoheheʻe ʻana o ka PFA.Hoʻokō ʻia kēia ma o ka hoʻoheheʻe ʻana maʻamau a me nā ʻenehana extrusion screw.

Hoʻohana kaulana ʻia ʻo PTFE ma ke ʻano he uhi lāʻau ʻole no nā pā a me nā mea kuke hou.Hoʻohana pinepine ʻia ʻo PTFE i nā ipu a me nā paipu no ka mālama ʻana i nā kemika reactive a corrosive.No ka mea, loaʻa iā ia nā waiwai non-reactive.ʻO kekahi noi kūpono o ka PTFE he lubricant.Hoʻohana ʻia ma kēia ʻano, kōkua ka PTFE i ka hoʻohaʻahaʻa ʻana i ka friction i loko o nā mīkini, e hōʻemi i ka "ʻaʻahu a me ka waimaka," a hoʻomaikaʻi i ka hoʻohana ʻana i ka ikehu.

Hoʻohana maʻamau ʻia ka PFA no nā mea hana lab plastic ma muli o kona kūpaʻa nui ʻana i ka hoʻouka ʻana i ke kemika, ka ʻike maka, a me ka maʻalahi holoʻokoʻa.Hoʻohana pinepine ʻia ʻo PFA ma ke ʻano he paipu no ka mālama ʻana i nā kaʻina hana koʻikoʻi a i ʻole ka corrosive.ʻO nā noi ʻē aʻe no ka PFA e like me nā linings sheet no nā mea kemika.Ma muli o kāna mau waiwai, hiki iā ia ke maʻalahi i ka hoʻohana ʻana i nā plastics carbon steel fiber reinforced plastics (FRPs) ma ke ʻano he pani no nā mea hao a me nā metala ʻoi aku ka maikaʻi.

Hōʻike pinepine ʻia nā mea hana i hoʻohana ʻia no ke ana pae ʻana i nā lewa pahu pahu ʻino.Hiki ke hoʻopōʻino i nā ʻimi a me nā ʻāpana e pili ana i ka huahana, e like me ka waikawa.ʻO nā huahana viscous a sticky kekahi mau pilikia ana i ke ana pae.Hiki i kēia ke hana i ke kūkulu ʻana i nā ʻāpana pulu o ka transmitter a hoʻonui i ka pilikia o ka hoʻopili ʻana i ke ana.Hāʻawi nā ʻāpana wai i uhi ʻia i nā mea PTFE a i ʻole PFA i ke kūʻē maikaʻi ʻana i nā huahana corrosive a he hopena maikaʻi ia no ka pale ʻana i ka haumia i hoʻokumu ʻia e ka huahana.

Hiki i nā huahana wai ke kumu i ka condensation ma ka antenna, hiki ke hoʻopilikia i ke ana pae.Ma muli o nā waiwai hydrophobic o PTFE a me PFA, ʻaʻole e hoʻopilikia ʻia ke ana i ka hihia o nā kulu wai e kūkulu ʻia ma nā ʻāpana antenna.

ʻO PTFE, he paʻa fluorocarbon, he hydrophobic, ʻo ia hoʻi, ʻaʻole maʻalahi ka pulu ʻana e nā mea i loko o ka wai.Eia kekahi, loaʻa iā PTFE kahi koena haʻahaʻa haʻahaʻa o ka friction ke hoʻopili ʻia me nā mea paʻa.

ʻOi aku ka PFA ma mua o ka PTFE ma ke ʻano o ka maʻalahi i ka wā e pili ana i nā noi paipu.Ma ka ʻaoʻao ʻē aʻe, ʻoi aku ka haʻahaʻa o ke ola maʻalahi o PFA (ʻo ia hoʻi, hiki ke hoʻomanawanui i ka pelu ʻana) ma mua o PTFE.

ʻOi iki ka PTFE i ka wela ma mua o ka PFA.ʻOi aku ka hopena o ka PFA i ka hoʻoheheʻe ʻana i ka wai a me ka hoʻoheheʻe ʻana akā ʻoi aku ka maikaʻi ma mua o ka PTFE i ka wā e hiki mai ana i ka paʻakai paʻakai.

PFA i ka like dielectric mau e like me PTFE a me ka mea like loa dissipation kumu;akā, he ikaika dielectric ka PFA i ʻekolu a ʻehā mau manawa kiʻekiʻe ma mua o PTFE.