Kunyange zvazvo PTFE (polytetrafluoroethylene) uyeePTFE(yakawedzerwa polytetrafluoroethylene) vane makemikari akafanana, vane misiyano yakakura mukugadzirisa, kushanda uye nzvimbo dzekushandisa.
Chimiro chemakemikari uye zvakakosha zvinhu
Ose ari maviri PTFE uye ePTFE akaiswa polymerized kubva ku tetrafluoroethylene monomers, uye ese ane kemikari formula (CF₂-CF₂) ₙ, iyo ine makemikari inert zvakanyanya uye inoshingirira kune yakanyanya kupisa. PTFE inoumbwa nepamusoro-tembiricha sintering, uye maketani emamorekuru akanyatsorongedzwa kuti aite dense, isina-porous chimiro. ePTFE inoshandisa yakakosha kutambanudza maitiro kuita PTFE fiberize patembiricha yepamusoro kugadzira porous mesh chimiro chine porosity ye70% -90%.
Kuenzanisa kwezvinhu zvemuviri
| Features | PTFE | ePTFE |
| Density | Pamusoro (2.1-2.3 g/cm³) | Yakaderera (0.1-1.5 g/cm³) |
| Permeability | Hapana permeability (yakazara dense) | High permeability (micropores inobvumira kupararira kwegesi) |
| Kuchinja-chinja | Zvine kuoma uye brittle | High flexibility uye elasticity |
| Mechanical simba | High compressive simba, yakaderera misodzi kuramba | Zvakanyanya kunatsiridzwa kubvarura kuramba |
| Porosity | Hapana pores | Porosity inogona kusvika 70% -90% |
Maitiro ekushanda
●PTFE: Iine makemikari inert uye inopesana neakasimba acids, alkali yakasimba uye organic solvents, ine tembiricha ye -200 ° C kusvika +260 ° C, uye ine yakanyanya kuderera dielectric constant (inenge 2.0), zvichiita kuti ive yakakodzera kune yakakwirira-frequency circuit insulation.
● ePTFE: Chimiro che microporous chinogona kuwana mvura isina mvura uye inofema zvinhu (zvakadai seGore-Tex musimboti), uye inoshandiswa zvakanyanya mumishonga yemishonga (yakadai sevascular patches). Iyo porous chimiro chakakodzera kuvhara gaskets (rebound mushure mekumanikidza kuzadza gap).
Mamiriro ekushandisa akajairika
● PTFE: Inokodzera kupisa-tembiricha tambo yekumisa, inotakura lubrication coatings, kemikari pombi linings, uye yakakwirira-kuchena reactor linings mu semiconductor industry.
● ePTFE: Mumunda wetambo, inoshandiswa sevhavha yekudzivirira ye-high-frequency communication cables, munharaunda yezvokurapa, inoshandiswa pamidziyo yeropa yakagadzirwa uye sutures, uye mundima yeindasitiri, inoshandiswa pamafuta cell cell proton exchange membranes uye air filtration materials.
PTFE uye ePTFE imwe neimwe ine zvayakanakira. PTFE inokodzera kupisa kwakanyanya, kudzvanywa kwepamusoro, uye makemikari anoparadza nharaunda nekuda kwekunyanya kupisa kwekudzivirira, kupikisa kemikari, uye kuderera kwekukwenya coefficient; ePTFE, ine kuchinjika kwayo, kufema kwemhepo, uye biocompatibility yakaunzwa neiyo microporous chimiro, inoita zvakanaka mumaindasitiri ekurapa, kusefa, uye ane simba ekuisa chisimbiso. Sarudzo yezvinyorwa inofanirwa kutariswa zvichienderana nezvinodiwa zveiyo chaiyo application mamiriro.
Ndeapi mashandisirwo ePTFE mumunda wekurapa?
ePTFE (yakawedzerwa polytetrafluoroethylene)inoshandiswa zvakanyanya munharaunda yekurapa, kunyanya nekuda kweiyo yakasarudzika microporous chimiro, biocompatibility, isiri-chepfu, isinganzwisisi uye isiri-carcinogenic zvimiro. Izvi zvinotevera mashandisirwo ayo makuru:
1. Munda wemwoyo
Mitsipa yeropa yeArtificial: ePTFE ndiyo inonyanya kushandiswa kugadzira zvinhu zvemidziyo yeropa, inoverengera inosvika 60%. Chimiro chayo che microporous chinobvumira maseru emunhu uye tsinga dzeropa kukura mukati mayo, zvichiita chinongedzo padyo ne autologous tishu, nekudaro kuvandudza mwero wekuporesa uye kusimba kwetsinga dzeropa.
Heart patch: inoshandiswa kugadzirisa matishu emwoyo, senge pericardium. ePTFE heart patch inogona kudzivirira kunamatira pakati pemoyo uye sternum tissue, kuderedza dambudziko rekuvhiyiwa kwechipiri.
Vascular stent: ePTFE inogona kushandiswa kugadzira iyo yevascular stents, uye yayo yakanaka biocompatibility uye mechanical properties inobatsira kuderedza kuzvimba uye thrombosis.
2. Kuvhiyiwa kwepurasitiki
Kudyara kumeso: ePTFE inogona kushandiswa kugadzira kumeso epurasitiki zvinhu, senge rhinoplasty uye kumeso fillers. Yayo microporous chimiro inobatsira kukura kwenyama uye inoderedza kurambwa.
Orthopedic implants: Mumunda we orthopedics, ePTFE inogona kushandiswa kugadzira majoini maimplants, uye yayo yakanaka kupfeka kuramba uye biocompatibility inobatsira kuwedzera hupenyu hwesevhisi yezvidyarwa.
3. Mamwe maapplication
Hernia patches: Hernia patches yakagadzirwa ePTFE inogona kudzivirira hernia kudzoka, uye chimiro chayo cheporous chinobatsira kubatanidzwa kwetishu.
Medical sutures: ePTFE sutures ine zvakanaka kushanduka uye kusimba simba, izvo zvinogona kuderedza kusungirirwa kwematishu mushure mekuvhiyiwa.
Mavharuvhu emwoyo: ePTFE inogona kushandiswa kugadzira mavharuvhu emwoyo, uye kusimba kwayo uye biocompatibility inobatsira kuwedzera hupenyu hwebasa remavharuvhu.
4. Mishonga yemishonga yezvokurapa
ePTFE inogona zvakare kushandiswa pakupfekedza kwemidziyo yekurapa, senge catheter uye zviridzwa zvekuvhiya. Iyo yakaderera coefficient yekukwesha uye biocompatibility inobatsira kuderedza kukuvara kwetishu panguva yekuvhiya
Nguva yekutumira: Kubvumbi-27-2025