Tepi ya PTFE yotentha kwambiri yomwe imagwiritsidwa ntchito pamipeni yotsekera kutentha ndi zomangira zosindikizira zimapereka zinthu zinayi zofunika kwambiri: imateteza kumamatira kwa pulasitiki yosungunuka (kumathetsa nthawi yopuma), imateteza kusindikiza kokwera mtengo, kumapangitsa kutentha / kupanikizika kwa zisindikizo zosasinthasintha, ndi kuchepetsa kukangana kwa mafilimu. Fiberglass-backed tepi (0.13-0.25 mm) yokhala ndi silicone PSA (≥260 ° C) ikulimbikitsidwa. Anti-static wakuda tepi ya mizere yothamanga kwambiri.

The madzi nthunzi chotchinga katundu wa PTFE zomatira tepi anatsimikiza makamaka ndi ❖ kuyanika zolakwika (micropores, microcracks, CHIKWANGWANI wicking) osati PTFE a intrinsic hydrophobicity. Filimu yoyera ya PTFE imapereka WVTR yapakatikati yokha. Zopaka zamitundu yambiri ndi zodzaza ndi lamellar (mica, magalasi agalasi) zimapanga mphamvu ya labyrinth, kuchepetsa kwambiri kufalikira kwa nthunzi. Kuti musindikize chinyezi chambiri, tchulani zokutira zolimba.

Kulimbana ndi kukana kwa tepi yomatira ya PTFE yotentha kwambiri pansi pa katundu wanthawi yayitali (makamaka pa 200-260 ° C) kumatsimikiziridwa ndi zinthu ziwiri: silicone PSA crosslink density (high crosslinking imalepheretsa kutuluka) ndi mtundu wa gawo lapansi (fiberglass-reinforced PTFE imatsutsa kuzizira kozizira; filimu yoyera ya PTFE imakwawa). Zomatira zosagwirizana zimalephera mwachangu pakutentha kwakukulu. Zomata zokhuthala zimawonjezera chiopsezo chokwera.

Pakuti PTFE mkulu-kutentha tepi ntchito abrasive kutsetsereka mikangano ntchito, muyezo sanali ndodo ndi kutentha kukana ndizosakwanira. Zosankha zofunika kwambiri: Taber abrasion loss (<15 mg/1000 cycles), yodzaza PTFE yosinthidwa (carbon/graphite/MoS₂), PV limit data, substrate strength (≥200 N/cm), ndi mating pamwamba roughness (Ra 0.2-0.4 μm). Chitetezo chokwanira m'mphepete ndi mgwirizano wonse ndizofunikira kuti mukhale ndi moyo wautali.

Gawo laling'ono la PTFE ndilosamva kupopera kwa mchere (mayamwidwe amadzi <0.01%). Komabe, ntchito ya tepi yonse imadalira mtundu womatira: silikoni PSA imalimbana ndi malo am'madzi (500-1000h mayeso opopera mchere,> 80% kusunga peel); acrylic PSA amalephera. Kusamalira bwino pamtunda, kugwiritsa ntchito zopanda thovu, ndi kusindikiza m'mphepete ndi silicone sealant ndizofunikira kuti mukhale odalirika kwa nthawi yayitali pamapulatifomu ndi zombo zapanyanja.

PTFE fiberglass tepi imafuna ziphaso zitatu zazikulu zachitetezo: UL (chitetezo chamagetsi ndi lawi lamoto), FDA (kutsata kukhudzana ndi chakudya), ndi ISO 9001:2015 (kasamalidwe kabwino). Matepi ovomerezeka amapereka magwiridwe antchito nthawi zonse, moyo wautali wautumiki, komanso kutsika mtengo kwa umwini ngakhale mtengo wake ukukwera. Nthawi zonse muzitsimikizira ziphaso mwachindunji ndi mabungwe omwe akupereka.

Tepi ya PTFE yotentha kwambiri imagwiritsidwa ntchito pamigawo itatu yamankhwala: chitetezo cha zida zotsekereza (mathirelo a autoclave, zotsekera zotsekera kutentha), chithandizo chapamwamba cha zida (zotchingira zotsika kwambiri, zotchingira magetsi), ndi zida zotsekera (mitsempha ya mitsempha, zolumikizira). Biocompatibility imatsimikiziridwa kudzera mu ISO 10993, ndipo FDA 21 CFR 177.1550 imakhazikitsa chitetezo chazinthu zoyambira.

Tepi yotentha kwambiri ya PTFE ili ndi kukana koyipa kwa radiation ya ionizing. Pamawonekedwe a 1 kGy a gamma, mphamvu zamphamvu zimatsika kufika ~ 25% yapachiyambi. Ndikoyenera kokha kwa malo otsika kwambiri (chakudya / kutseketsa kwachipatala <10 kGy). Pamakampani a nyukiliya kapena zoyenda zakuthambo, gwiritsani ntchito polyimide kapena PEEK m'malo mwake.

Kwa PTFE matepi otentha kwambiri pansi pa kumizidwa kwa nthawi yaitali, gawo lapansi la PTFE limakhalabe ndi mankhwala, koma zomatira ndizofooka. Madzi amafooketsa silikoni PSA; madzi amchere amathandizira kuti dzimbiri. Pa mankhwala aukali, zomatira za fluorosilicone kapena perfluoropolyether - kapena tepi ya PTFE yopanda zomatira - ndiyofunika. Kutaya mphamvu kwa peel mpaka 40% pambuyo pa maola 48 m'madzi.

Tepi ya PTFE yotentha kwambiri yomwe imagwiritsidwa ntchito pokhudzana ndi chakudya iyenera kukhala mkati mwa malire omwe atchulidwa kutentha: ≤260 ° C kuti agwiritsidwe ntchito mosalekeza, ≤300 ° C kwa nsonga zazifupi (mphindi), ndipo osapitirira 327 ° C (kuwola). Malamulo a FDA ndi EU samatchula malire anthawi zonse - nthawi yolumikizana yotetezeka imadalira kutentha ndipo iyenera kutsimikiziridwa ndi mayeso osamukira kutengera momwe zinthu ziliri.