ʻOiai ʻo PTFE (polytetrafluoroethylene) a meePTFE(hoʻonui ʻia ka polytetrafluoroethylene) i ke kumu kemika like, he ʻokoʻa koʻikoʻi ko lākou i ke ʻano, ka hana a me nā wahi noi.
ʻAno kemika a me nā waiwai kumu
Ua polymerized ʻia ʻo PTFE a me ePTFE mai nā monomers tetrafluoroethylene, a loaʻa iā lāua ke ʻano kemika (CF₂-CF₂)ₙ, he inert kemika loa a kūpaʻa i nā mahana kiʻekiʻe. Hoʻokumu ʻia ka PTFE e ka sintering wela kiʻekiʻe, a ua hoʻonohonoho pono ʻia nā kaulahao molekala e hana i kahi ʻano paʻa, ʻaʻole porous. Hoʻohana ʻo ePTFE i kahi kaʻina hana hoʻolōʻihi kūikawā e hana i ka PTFE fiberize i nā mahana kiʻekiʻe e hana i kahi ʻano mesh porous me ka porosity o 70%-90%.
Hoʻohālikelike ʻana o nā waiwai kino
| Nā hiʻohiʻona | PTFE | ePTFE |
| Ka nui o ka paʻa | Kiʻekiʻe (2.1-2.3 g/cm³) | Haʻahaʻa (0.1-1.5 g/cm³) |
| Ka hiki ke komo | ʻAʻohe permeability (paʻa loa) | Ka permeability kiʻekiʻe (ʻae nā micropores i ka hoʻolaha kinoea) |
| Ka maʻalahi | Paʻakikī a palupalu hoʻi | Ka maʻalahi a me ka elasticity kiʻekiʻe |
| Ikaika mīkini | Ikaika compressive kiʻekiʻe, kū'ē haʻalulu haʻahaʻa | Hoʻomaikaʻi nui ʻia ke kūpaʻa waimaka |
| Ka porosity | ʻAʻohe pores | Hiki i ka porosity ke piʻi i 70% -90% |
Nā ʻano hana
●PTFE: He inert kemika a kūpaʻa i nā waikawa ikaika, nā alkalis ikaika a me nā mea hoʻoheheʻe organik, loaʻa ka pae mahana o -200°C a i +260°C, a he haʻahaʻa loa ka dielectric constant (e pili ana i 2.0), e kūpono ana no ka insulation circuit frequency kiʻekiʻe.
● ePTFE: Hiki i ke ʻano microporous ke hoʻokō i nā waiwai wai ʻole a me ka hanu ʻana (e like me ke kumumanaʻo Gore-Tex), a hoʻohana nui ʻia i nā implants lapaʻau (e like me nā ʻāpana vascular). He kūpono ke ʻano porous no ka hoʻopaʻa ʻana i nā gaskets (rebound ma hope o ke kaomi ʻana e hoʻopiha i ka hakahaka).
Nā hiʻohiʻona noi maʻamau
● PTFE: Kūpono no ka hoʻopaʻa ʻana o ke kaula wela kiʻekiʻe, nā uhi lubrication bearing, nā uhi pipeline kemika, a me nā uhi reactor maʻemaʻe kiʻekiʻe i ka ʻoihana semiconductor.
● ePTFE: Ma ke kahua uwea, hoʻohana ʻia ia ma ke ʻano he papa insulation o nā uwea kamaʻilio alapine kiʻekiʻe, ma ke kahua lapaʻau, hoʻohana ʻia ia no nā kīʻaha koko hana a me nā sutures, a ma ke kahua ʻoihana, hoʻohana ʻia ia no nā membrane hoʻololi proton cell wahie a me nā mea kānana ea.
Loaʻa i ka PTFE a me ka ePTFE ko lākou mau pono ponoʻī. He kūpono ka PTFE no nā wahi wela kiʻekiʻe, kaomi kiʻekiʻe, a me nā wahi ʻino kemika ma muli o kona kūpaʻa wela kiʻekiʻe, ke kūpaʻa kemika, a me ke koina haʻahaʻa haʻalulu; ʻo ka ePTFE, me kona maʻalahi, ka permeability ea, a me ka biocompatibility i lawe ʻia mai e kona ʻano microporous, hana maikaʻi i nā ʻoihana lapaʻau, kānana, a me ka sila ʻana. Pono e hoʻoholo ʻia ke koho ʻana o ka mea ma muli o nā pono o ke ʻano noi kikoʻī.
He aha nā noi o ePTFE ma ke kahua lapaʻau?
ePTFE (polytetrafluoroethylene i hoʻonui ʻia)hoʻohana nui ʻia i ke kahua lapaʻau, ma muli o kona ʻano microporous kūikawā, biocompatibility, ʻaʻohe ʻawahia, ʻaʻohe sensitizing a me nā waiwai ʻaʻole carcinogenic. Eia kāna mau noi nui:
1. Kahua cardiovascular
Nā kīʻaha koko hana: ʻO ka ePTFE ka mea synthetic i hoʻohana nui ʻia no nā kīʻaha koko hana, e helu ana ma kahi o 60%. ʻO kona ʻano microporous e ʻae i nā ʻiʻo kanaka a me nā kīʻaha koko e ulu i loko, e hana ana i kahi pilina kokoke i ka ʻiʻo autologous, no laila e hoʻomaikaʻi ana i ka wikiwiki o ka ho'ōla a me ke kūpaʻa o nā kīʻaha koko hana.
Pāpili puʻuwai: hoʻohana ʻia e hoʻoponopono i nā ʻiʻo puʻuwai, e like me ka pericardium. Hiki i ka pāpili puʻuwai ePTFE ke pale i ka hoʻopili ʻana ma waena o ka puʻuwai a me ka ʻiʻo sternum, e hōʻemi ana i ka pilikia o ke ʻoki lua.
ʻO ka stent vascular: Hiki ke hoʻohana ʻia ka ePTFE e hana i ka uhi ʻana o nā stents vascular, a ʻo kona biocompatibility maikaʻi a me nā waiwai mechanical e kōkua i ka hōʻemi ʻana i ka mumū a me ka thrombosis.
2. ʻOki ʻoki kino
Nā mea hoʻokomo maka: Hiki ke hoʻohana ʻia ka ePTFE e hana i nā mea palaki maka, e like me ka rhinoplasty a me nā mea hoʻopihapiha maka. Kōkua kona ʻano microporous i ka ulu ʻana o nā ʻiʻo a hōʻemi i ka hōʻole ʻana.
Nā mea hoʻokomo Orthopedic: Ma ke kahua o orthopedics, hiki ke hoʻohana ʻia ka ePTFE e hana i nā mea hoʻokomo hui, a ʻo kona kūpaʻa maikaʻi ʻana i ke kapa komo a me ka biocompatibility e kōkua i ka hoʻonui ʻana i ke ola lawelawe o nā mea hoʻokomo.
3. Nā noi ʻē aʻe
Nā ʻāpana Hernia: Hiki i nā ʻāpana Hernia i hana ʻia me ka ePTFE ke pale pono i ka hoʻi hou ʻana o ka hernia, a ʻo kona ʻano porous e kōkua i ka hoʻohui ʻana o nā ʻiʻo.
Nā sutures lapaʻau: Loaʻa i nā sutures ePTFE ka maʻalahi a me ka ikaika tensile, hiki ke hōʻemi i ka hoʻopili ʻana o ke kino ma hope o ke ʻoki ʻana.
Nā kiwikā puʻuwai: Hiki ke hoʻohana ʻia ka ePTFE e hana i nā kiwikā puʻuwai, a ʻo kona kūpaʻa a me ka biocompatibility e kōkua i ka hoʻonui ʻana i ke ola lawelawe o nā kiwikā.
4. Nā uhi ʻana o nā hāmeʻa lapaʻau
Hiki ke hoʻohana ʻia ka ePTFE no nā uhi o nā mea lapaʻau, e like me nā catheters a me nā mea hana ʻoki. ʻO kona coefficient haʻahaʻa o ka friction a me ka biocompatibility e kōkua i ka hōʻemi ʻana i ka hōʻino ʻana o nā ʻiʻo i ka wā o ke ʻoki ʻana.
Ka manawa hoʻouna: ʻApelila-27-2025