Txawm hais tias PTFE (polytetrafluoroethylene) thiabePTFE(expanded polytetrafluoroethylene) muaj tib lub hauv paus tshuaj, lawv muaj qhov sib txawv tseem ceeb hauv cov qauv, kev ua tau zoo thiab daim ntawv thov.
Cov qauv tshuaj thiab cov khoom siv yooj yim
Ob leeg PTFE thiab ePTFE yog polymerized los ntawm tetrafluoroethylene monomers, thiab ob leeg muaj cov tshuaj formula (CF₂-CF₂)ₙ, uas yog heev chemically inert thiab resistant rau kub kub. PTFE yog tsim los ntawm high-temperature sintering, thiab cov saw hlau molecular yog ze ze rau tsim ib tug ntom, uas tsis yog-porous qauv. ePTFE siv cov txheej txheem stretching tshwj xeeb los ua PTFE fiberize ntawm qhov kub thiab txias los tsim cov qauv ntxeem tau nrog cov porosity ntawm 70% -90%.
Kev sib piv ntawm lub cev muaj zog
| Nta | PTFE | ePTFE |
| Qhov ntom | Siab (2.1-2.3 g / cm³) | Tsawg (0.1-1.5 g / cm³) |
| Permeability | Tsis muaj permeability (tag nrho ntom) | High permeability (micropores tso cai rau cov roj diffusion) |
| Yooj yim | Nyuaj heev thiab nkig | High yooj thiab elasticity |
| Mechanical zog | High compressive zog, tsis tshua muaj kua muag kuj | Txhim kho tsim kua muag tau zoo heev |
| Porosity | Tsis muaj pores | Porosity tuaj yeem ncav cuag 70% -90% |
Cov yam ntxwv ua haujlwm
●PTFE: Nws yog chemically inert thiab resistant rau muaj zog acids, muaj zog alkalis thiab organic solvents, muaj ib tug kub ntawm -200 ° C rau +260 ° C, thiab muaj ib tug tsis tshua muaj dielectric tsis tu ncua (kwv yees 2.0), ua rau nws haum rau high-frequency Circuit Court rwb thaiv tsev.
● ePTFE: Cov qauv microporous tuaj yeem ua tiav cov khoom tsis muaj dej thiab ua pa (xws li Gore-Tex txoj cai), thiab tau siv dav hauv kev cog qoob loo (xws li vascular thaj ua rau thaj). Cov qauv ntxeem tau haum rau sealing gaskets (rebound tom qab compression los sau qhov sib txawv).
Tej yam kev thov scenarios
● PTFE: Haum rau high-temperature cable rwb thaiv tsev, bearing lubrication coatings, tshuaj pipeline linings, thiab high-purity reactor linings nyob rau hauv lub semiconductor kev lag luam.
● ePTFE: Nyob rau hauv lub tshav pob cable, nws yog siv los ua cov txheej rwb thaiv tsev ntawm high-frequency kev sib txuas lus cables, nyob rau hauv kev kho mob, nws yog siv rau cov hlab ntsha thiab sutures, thiab nyob rau hauv kev lag luam teb, nws yog siv rau roj cell proton txauv membranes thiab huab cua filtration ntaub ntawv.
PTFE thiab ePTFE txhua tus muaj lawv tus kheej zoo. PTFE yog tsim rau kub, siab siab, thiab tshuaj corrosive ib puag ncig vim nws superior kub tsis kam, tshuaj tsis kam, thiab tsis tshua muaj kev sib txhuam coefficient; ePTFE, nrog nws yooj yim, huab cua permeability, thiab biocompatibility coj los ntawm nws cov qauv microporous, ua tau zoo nyob rau hauv kev kho mob, pom, thiab dynamic sealing industries. Kev xaiv cov khoom siv yuav tsum tau txiav txim siab raws li qhov xav tau ntawm cov ntawv thov tshwj xeeb scenario.
Dab tsi yog cov ntawv thov ntawm ePTFE hauv kev kho mob?
ePTFE (exanded polytetrafluoroethylene)yog siv dav hauv kev kho mob, feem ntau yog vim nws cov qauv microporous tshwj xeeb, biocompatibility, non-toxic, non-sensitizing thiab non-carcinogenic zog. Cov hauv qab no yog nws cov kev siv tseem ceeb:
1. Kab mob plawv
Artificial hlab ntsha: ePTFE yog cov khoom siv hluavtaws feem ntau siv rau cov hlab ntsha, suav txog li 60%. Nws cov qauv microporous tso cai rau tib neeg cov ntaub so ntswg thiab cov hlab ntsha loj hlob hauv nws, tsim kev sib txuas ze rau cov ntaub so ntswg autologous, yog li txhim kho tus nqi kho thiab ua haujlwm ntawm cov hlab ntsha.
Lub plawv thaj: siv los kho cov ntaub so ntswg plawv, xws li pericardium. ePTFE lub plawv thaj tuaj yeem tiv thaiv adhesion ntawm lub plawv thiab sternum cov ntaub so ntswg, txo qhov kev pheej hmoo ntawm kev phais thib ob.
Vascular stent: ePTFE tuaj yeem siv los ua cov txheej txheem vascular stents, thiab nws cov biocompatibility zoo thiab cov khoom siv kho tshuab pab txo qhov mob thiab thrombosis.
2. Kev phais yas
Lub ntsej muag implants: ePTFE tuaj yeem siv los ua cov ntaub ntawv yas ntawm lub ntsej muag, xws li rhinoplasty thiab lub ntsej muag fillers. Nws cov qauv microporous pab cov ntaub so ntswg loj hlob thiab txo kev tsis lees paub.
Orthopedic implants: Nyob rau hauv lub tshav pob ntawm orthopedics, ePTFE tuaj yeem siv los tsim cov kev cog hniav sib koom ua ke, thiab nws cov kev hnav zoo thiab biocompatibility pab ua kom cov kev pab cuam lub neej ntawm cov cog cog.
3. Lwm yam kev siv
Hernia thaj ua rau thaj: Hernia thaj ua rau thaj ua los ntawm ePTFE tuaj yeem tiv thaiv hernia rov zoo, thiab nws cov qauv ntxeem tau pab cov ntaub so ntswg sib xyaw.
Kev kho mob sutures: ePTFE sutures muaj qhov yooj yooj yim thiab lub zog tensile, uas tuaj yeem txo cov ntaub so ntswg tom qab phais.
Lub plawv li qub: ePTFE tuaj yeem siv los tsim lub plawv li qub, thiab nws cov kav ntev thiab biocompatibility pab ua kom lub neej ua haujlwm ntawm li qub.
4. Cov khoom siv kho mob txheej txheej
ePTFE kuj tseem siv tau rau cov txheej txheem kho mob, xws li catheters thiab cov cuab yeej phais. Nws qis coefficient ntawm kev sib txhuam thiab biocompatibility pab txo cov nqaij mos puas thaum phais
Post lub sij hawm: Apr-27-2025