E ui lava o le PTFE (polytetrafluoroethylene) maePTFE(polytetrafluoroethylene fa'alauteleina) e tutusa le fa'avae kemikolo, e iai a latou eseesega tele i le fausaga, fa'atinoga ma vaega fa'aoga.
Fa'asologa o vaila'au ma mea fa'avae
O le PTFE ma le ePTFE e polymerized mai le tetrafluoroethylene monomers, ma o loʻo i ai uma le fua faʻatatau (CF₂-CF₂)ₙ, lea e maualuga le malosi o kemikolo ma e faʻafefe i le maualuga o le vevela. PTFE ua faia e ala i le maualuga-vevela sintering, ma le molecular filifili ua vavalalata faatulagaina e fausia ai se mafiafia, fausaga e le porous. ePTFE faʻaaogaina se faʻagasologa faʻapitoa faʻalauteleina e fai ai le PTFE fiberize i le maualuga o le vevela e fausia ai se fausaga faʻapipiʻi porous ma se porosity o le 70% -90%.
Fa'atusatusaga o mea totino
| Vaega | PTFE | ePTFE |
| Malosi | Maualuluga (2.1-2.3 g/cm³) | Maulalo (0.1-1.5 g/cm³) |
| Talitonu | Leai se fa'aogaina (matua mafiafia) | Maualuluga le fa'aogaina (micropores e mafai ai ona fa'asalalauina le kesi) |
| Fetuuna'i | Faigata ma'a'a ma malepe | Maualuluga fetuutuunai ma elasticity |
| Malosi fa'ainisinia | Malosi compressive maualuga, maualalo loimata tetee | Faʻaleleia atili le teteʻe o loimata |
| Porosity | Leai ni pores | Porosity e mafai ona oʻo atu i le 70% -90% |
Uiga galue
●PTFE: E chemically inert ma tetee i acids malosi, malosi alkalis ma organic solvents, ei ai le fua o le vevela o le -200°C i le +260°C, ma e matua maualalo le dielectric tumau (e uiga i le 2.0), e talafeagai mo le insulation matagaluega maualuga.
● ePTFE: O le microporous structure e mafai ona ausia mea e le susu ma manava (e pei o le Gore-Tex mataupu faavae), ma e faʻaaogaina lautele i mea faʻapitoa faʻafomaʻi (e pei o vascular patches). O le fausaga porous e talafeagai mo le faʻamaufaʻailoga gaskets (rebound pe a uma le faʻamalosi e faʻatumu ai le avanoa).
Fa'aaliga fa'aoga masani
● PTFE: E fetaui lelei mo le maualuga o le vevela o le cable insulation, faʻapipiʻi lubrication coatings, paipa vailaʻau vailaʻau, ma le maualuga o le mama o le reactor i totonu o le semiconductor industry.
● ePTFE: I totonu o le fanua uaea, e faʻaaogaina e pei o le insulation layer o fesoʻotaʻiga telefoni feaveaʻi, i totonu o le falemaʻi, e faʻaaogaina mo vaʻa toto faʻapitoa ma sutures, ma i totonu o le fale gaosi oloa, e faʻaaogaina mo suauu suauʻu suauʻu suauʻu proton ma mea ea filtration.
O le PTFE ma le ePTFE e tofu ma a latou lava mea lelei. PTFE e talafeagai mo le vevela maualuga, maualuga le mamafa, ma siosiomaga corrosive chemically ona o lona teteʻe maualuga vevela, tetee kemikolo, ma le maualalo feeseeseaʻi coefficient; ePTFE, faʻatasi ai ma lona fetuutuunaʻi, faʻaogaina o le ea, ma le biocompatibility o loʻo aumaia e lona fausaga microporous, e faʻatino lelei i falemaʻi, faʻamama, ma faʻamaufaʻailoga malosi. O le filifiliga o meafaitino e tatau ona fuafua e faʻatatau i manaʻoga o le faʻataʻitaʻiga faʻapitoa.
O a faʻaoga o le ePTFE i le falemaʻi?
ePTFE (fa'alauteleina polytetrafluoroethylene)o loʻo faʻaaogaina lautele i le falemaʻi, e mafua ona o lona tulaga faʻapitoa microporous, biocompatibility, non-toxic, non-sensitizing ma non-carcinogenic meatotino. O ona fa'aoga autu nei:
1. Fa'ato'aga fatu
Va'a toto fa'apitoa: ePTFE o le mea fa'aoga sili ona fa'aogaina mo va'a toto fa'afua, e tusa ma le 60%. O lona fausaga microporous e mafai ai ona ola i totonu sela o le tagata ma toto toto, e fausia ai se fesoʻotaʻiga vavalalata i le autologous tissue, ma faʻaleleia ai le faʻamalologa ma le tumau o vaʻa toto faʻapitoa.
Fa'ato'aga fatu: fa'aaoga e toe fa'aleleia ai aano o le fatu, pei o le pericardium. ePTFE fatu patch e mafai ona puipuia le pipii i le va o le fatu ma le sternum aano, faʻaitiitia le lamatiaga o le taotoga lona lua.
Vascular stent: ePTFE e mafai ona faʻaaogaina e fai ai le ufiufi o vascular stents, ma o lona biocompatibility lelei ma mea faʻainisinia e fesoasoani e faʻaitiitia ai le mumū ma le thrombosis.
2. taotoga palasitika
Fa'apipi'i mata: ePTFE e mafai ona fa'aogaina e fai ai mea palasitika mata, e pei ole rhinoplasty ma fa'atumu mata. O lona fausaga microporous e fesoasoani i le tuputupu aʻe o le tino ma faʻaitiitia le teena.
Orthopedic implants: I totonu o le faʻalapotopotoga o faʻamaʻi, ePTFE e mafai ona faʻaaogaina e gaosia ai faʻapipiʻi faʻapipiʻi, ma lona lelei o le ofuina ma le biocompatibility fesoasoani e faʻateleina le ola tautua o faʻapipiʻi.
3. Isi talosaga
Hernia patches: Hernia patches faia i le ePTFE e mafai ona puipuia lelei le toe tupu mai o le hernia, ma o lona fausaga porous e fesoasoani i le tuʻufaʻatasia o mea.
Sutures faafomai: ePTFE sutures e lelei le fetuutuunai ma le malosi tensile, lea e mafai ona faʻaitiitia ai le pipii o le tino pe a uma le taotoga.
Fa'atotonuga o le fatu: ePTFE e mafai ona fa'aoga e gaosia ai alatoto fatu, ma lona tumau ma le biocompatibility fesoasoani e fa'ateleina ai le ola tautua o va'a.
4. Faʻapipiʻi masini faʻafomaʻi
E mafai fo'i ona fa'aoga le ePTFE mo fa'alavalava o masini fa'afoma'i, e pei o catheters ma mea fai taotoga. O lona maualalo maualalo o fete'ena'iga ma le biocompatibility e fesoasoani e fa'aitiitia le fa'aleagaina o aano i le taimi o taotoga
Taimi meli: Apr-27-2025