ʻO PCTFE a i ʻole CTFE (ʻike mua ʻia ʻo Kel-F*) he nui nā waiwai e like me nā fluoropolymers ʻē aʻe e like me PTFE, FEP a i ʻole PFA, akā ʻoi aku ka maikaʻi o ka mechanically i ka rigidity (ʻaʻole maʻalahi ka deform), a he haʻahaʻa loa ke kinoea permeability.
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ʻO PCTFE a i ʻole CTFE (ʻike mua ʻia ʻo Kel-F*) he nui nā waiwai e like me nā fluoropolymers ʻē aʻe e like me PTFE, FEP a i ʻole PFA, akā ʻoi aku ka maikaʻi o ka mechanically i ka rigidity (ʻaʻole maʻalahi ka deform), a he haʻahaʻa loa ke kinoea permeability.ʻO kona kūpaʻa dimensional he mea hoihoi ia no ka hoʻohana ʻana ma ke ʻano he ʻāpana o kahi ʻāpana kūkulu kahi e koi ʻia ai ke kiʻekiʻe kiʻekiʻe a me ke kūpaʻa kemika o nā fluoropolymers.Hōʻike ka PCTFE i ka ikaika compressive kiʻekiʻe a me ka deformation haʻahaʻa ma lalo o ka ukana.Eia naʻe, ʻo kona kumukūʻai pili kekahi o nā mea nui e noʻonoʻo ai i kāna koho ʻana, no ka mea he pipiʻi loa ia.
Ke hoʻohana nei ka ʻoihana kila a me ka ʻoihana hoʻoheheʻe ʻana i nā huahana fluoropolymer tubing mai nā mea like me PTFE a me nā hoses no nā makahiki he nui no ka hoʻololi ʻana i nā kemika nui a i ʻole nā kemika corrosive.ʻOi aku ka nui, ke hoʻololi nei ka paipu PTFE i ke kalapona a me nā paipu metala ʻē aʻe e emi koke ana.I kēia manawa a no ka wā e hiki mai ana, e hoʻomau ka PTFE i ka lawelawe ʻana i ka ʻoihana i nā noi koʻikoʻi.
ʻO nā mea wela o ka PTFE:
Hiki i nā paipu PTFE ke pale i nā mahana a hiki i 680 °F no nā manawa palena.* Ma lalo o nā kūlana cryogenic, ikaika mau ka PTFE a hiki i -320 °F.
*Ma luna o 500 °F, lilo nā waiwai mechanical i mea palena
ʻO nā hiʻohiʻona uila PTFE:
He mau waiwai uila ko PTFE paipu, hōʻike ʻia e kahi mau dielectric haʻahaʻa o 2.1 ma waena o -40 °F a me 480 °F i loko o ke alapinepine o 5 Hz a 10 GHz.
ʻO ka paipu PTFE he insulator maikaʻi loa me ka resistivity o ka ili o 3.6 X 1012 ohms (ʻoiai ma 100% ka haʻahaʻa pili).
ʻO nā ikaika dielectric manawa pōkole mai ka 500 volts/mil (1 mil = 10-3 in) no nā mānoanoa ʻoi aku ma mua o 100 mils a 4000 volts/mil no nā kiʻiʻoniʻoni lahilahi loa.
Nā ʻokoʻa mai ka PTFE
ʻO ka PCTFE he homopolymer o ka chlorotrifluoroethylene (CTFE), aʻo ka PTFE he homopolymer o ka tetrafluoroethylene.'Oko'a ka monomer o ka mua mai ko ka hope ma ka ho'okomo 'ana i ka chlorine atom e pani ana i kekahi o na atoms fluorine.No laila, loaʻa i kēlā me kēia ʻāpana hou o PCTFE kahi ʻātoma chlorine ma kahi o kahi ʻātoma fluorine.ʻO kēia ka helu no ka PCTFE i ka liʻiliʻi o ke kaulahao a no laila ke kiʻekiʻe o ke aniani hoʻololi wela.He kiʻekiʻe ka helu heheʻe ʻana o ka PTFE a ʻoi aku ka crystalline ma mua o PCTFE, akā ʻoi aku ka ikaika a me ka ʻoi aku ka ikaika o ka PTFE.ʻOiai he kūpaʻa kemika maikaʻi loa ka PCTFE, ʻoi aku ka liʻiliʻi ma mua o ka PTFE.ʻO ka PCTFE he haʻahaʻa haʻahaʻa, ʻoi aku ka ikaika tensile a me ke kūpaʻa ʻana ma mua o ka PTFE.
ʻO ka PCTFE he injection moldable a extrudable akā ʻaʻole ʻo PTFE.
No laila, e ʻōlelo wau e pili ana i ka hoʻohana ʻana o ka valve.Loaʻa iā ʻoe nā palena o ka temp/pressure?He aha ka lawelawe wai/ mahu?Me he mea lā he maikaʻi ia no ka hapa nui o nā noi kahi i hoʻohana ʻia ai ka PTFE, akā aia nā mea kikoʻī, nā noi niche kahi e koi ʻia ai ka PTFE ma mua o ka PCTFE.
PTFE = polimerPCTFE = Kel-F
Ua kūpono nā mea ʻelua no ka hoʻohana ʻana i nā noho pōlele pōlele.ʻO ka ʻokoʻa nui ʻoi aku ka paʻakikī o ka PCTFE a ʻoi aku ka nui o ka friction.ʻO ka hopena o nā mea ʻelua, ʻo ia ka makemake e koi hou aku i ka torque e hoʻohuli i ka valve wehe a pani ʻia
PS: E hoʻokaʻaʻike mai iā mākou no ka laʻana manuahi ʻole o nā huahana PTFE
Ka manawa hoʻouna: Sep-17-2017