Tepi yachipatala ya PTFE yotentha kwambiri imaphatikiza gawo laling'ono la biocompatible PTFE ndi zomatira za silikoni zochiritsidwa ndi platinamu. Zofunika kwambiri: ISO 10993 yogwirizana (palibe cytotoxicity, sensitization, kapena irritation), imapirira kutsekereza mobwerezabwereza (steam/EO/gamma), 260°C kukana kutentha. Njira zodzitetezera: musapitirire 260 ° C (mafusi apoizoni opitilira 300 ° C), kuyatsa kwa gamma kungayambitse kutsekeka, kutsimikizira njira zotsekera, ndikupempha zolemba zonse zotsatila (malipoti a ISO 10993, MSDS, data yokalamba). Osati kuti agwiritse ntchito magazi achindunji kapena implantation pokhapokha atatsimikiziridwa mwachindunji.

Nsalu ya PTFE yotentha kwambiri imafuna kusamala mosamala kuti zitsimikizire chitetezo ndi moyo wautali. Njira zazikulu zodzitetezera: musapitirire 260 ° C (pamwamba pa 320 ° C imatulutsa utsi wapoizoni), pewani zowomba (zopaka ming'alu, zowonetsa magalasi a fiberglass), osatsuka ndi abrasive (ubweya wachitsulo umawononga malo osamangira ndodo), sungani chilolezo chokulitsa kutentha (kuletsa kung'ambika), ndikusintha pamene matuza kapena kusenda. Sitolo idagubuduzika, kutali ndi UV. Valani magolovesi oteteza kutentha mukamagwira ntchito.

Nsalu ya PTFE yotentha kwambiri imakhala ndi coefficient of thermal expansion (CTE) ya 30-60 ppm/°C (warp/weft) - yapamwamba kuposa fiberglass yokha koma yotsika kwambiri kuposa PTFE yoyera (100-200 ppm/°C). PTFE imasintha modzidzimutsa (1-2%) pa 19 ° C ndi 30 ° C kusintha kwa gawo. Kupewa kung'ung'udza, kung'ambika, ndi kung'ambika: zilolezo zamapangidwe kuti zikulitseni kwaulere, pewani kupindika ndi kutentha kwa gawo, gwiritsani ntchito ma tensioner pa malamba otumizira, ndipo gwiritsani ntchito anti-buckling overlop design. Kuyendera pafupipafupi kwa kuzizira ndikofunikira.

PTFE tepi reusability zimadalira zinthu zinayi: zomatira chiphunzitso (mkulu crosslink kachulukidwe, otsika silikoni migration, microphase dongosolo kwa repositionable tack), gawo lapansi anangula (pamwamba kutsegula + zoyambira kuteteza kutengerapo zomatira kutengerapo), kumbuyo ❖ kuyanika (kumasula wosanjikiza kuteteza zomatira pa unwinding), ndi kagwiridwe koyenera (zoyera zomatira pamwamba, zomatira zolondola pamwamba, kupewa zomatira pamwamba). Zomatira zotsuka ndi madzi zimatha kuchira> 90% tack pambuyo poyeretsa.

PTFE zowotchera nsalu zotentha kwambiri za PTFE zimapereka maubwino anayi ofunikira: kusagwira ntchito (palibe mafuta kapena ufa wofunikira, makeke osakhwima amamasulidwa bwino), kutentha kwakukulu (-70 ° C mpaka 260 ° C, otetezeka ku uvuni mpaka mufiriji), kugwiritsiridwanso ntchito (zikwizikwi, zosavuta kuyeretsa), komanso ngakhale kuwongolera kutentha (kuletsa kuyaka, bulauni moyenera). Mogwirizana ndi chakudya cha FDA, amatulutsa zikopa ndi kupitilira mateti a silikoni okhala ndi kutentha kwabwinoko komanso mawonekedwe owoneka bwino.

PTFE mkulu-kutentha nsalu n'kofunika mu zovala interlining makampani. Ntchito zazikulu: malamba osatha osatha amakina ophatikizana mosalekeza (amateteza zomatira zotentha zosungunuka, zomata zopanda makwinya), chivundikiro chosagwira ndodo ndi nsalu zomangira zosindikizira kutentha (amateteza ma platens kuti asaipitsidwe ndi zomatira), malamba otumizira madontho a madontho / zomatira zomatira kuyanika / sintering), ndi zovundikira nsapato zachitsulo zokanikizira zitsanzo. Kukhuthala kumachokera ku 0.13mm (padding yopepuka) mpaka 0.55mm (malamba onyamula katundu wolemera).

Fiberglass nsalu matenthedwe shrinkage ndiye chifukwa chachikulu cha PTFE tepi dimensional kusakhazikika. Pa kutentha kwa PTFE sintering (360-400 ° C), kupsinjika kotsalira koluka kumatulutsidwa. Ngati sichiletsa, nsalu imachepa; Ngati atalephereka, kupsinjika kobisika kumatsekeredwa, kumapangitsa kuchepa pang'onopang'ono pakuchiritsa zomatira (150-200 ° C) ndikutentha komaliza. Yankho: gwiritsani ntchito magalasi a fiberglass asanayambe kutentha ndi <0.5% shrinkage pa 400 ° C, kuchotsa kupsinjika kotsalira musanayambe kupaka.

Anti-static PTFE nsalu zimatheka kudzera njira ziwiri zazikulu: ❖ kuyanika doping (kusakaniza conductive fillers ngati mpweya wakuda mu PTFE emulsion, kupanga percolation network pa ndende yovuta) ndi gawo lapansi kuluka (embedding ulusi conductive mu fiberglass nsalu). Kulimbana kwapamwamba kumayendetsedwa pa 10⁵–10⁹ Ω. Mfundo: pangani njira yoyendetsera yomwe imatulutsa ma static charges nthawi yomweyo, kupewa kudzikundikira kowopsa. Kuyika pansi ndikofunikira kuti ntchito igwire bwino.

Thickeners mu PTFE emulsion amagwira ntchito zinayi zofunika kwambiri: kuyimitsidwa kukhazikika (kuletsa kukhazikika kwa wandiweyani PTFE particles), kumeta ubweya-kupatulira khalidwe (mkulu mamasukidwe akayendedwe pa mpumulo, otsika pansi mukubwadamuka kuti ❖ kuyanika kosavuta), kulamulira kuzama kolowera (amayendetsa kutsitsa kwa utomoni pa nsalu ya fiberglass), ndi kufanana kwa filimu (kuletsa kusweka pamene kuyanika). Chofunikira chofunikira: zokhuthala ziyenera kuwola kwathunthu pa kutentha kwa ~ 380 ° C, kusiya zotsalira za phulusa kuti zisunge zoyera komanso zotsekera magetsi.

Nsalu yotentha kwambiri ya PTFE (PTFE-yokutidwa ndi fiberglass) imapereka kukana kwamankhwala kwapadera, kupirira ma acid (kuphatikiza aqua regia), alkali amphamvu (kutentha kwachipinda), zosungunulira organic, ndi ma oxidizing agents. Kupatulapo: zitsulo zosungunuka za alkali ndi ma halogen otenthetsera kwambiri amaukira PTFE. Kuwonongeka kwa zokutira kumawonetsa magalasi a fiberglass ku hydrofluoric acid ndi ma alkali otentha kwambiri. Kutentha pamwamba pa 260 ° C kumachepetsa kukana. Pazinthu zambiri zama mankhwala, nsalu ya PTFE imakhalabe yokhazikika komanso yodalirika.