Thepa ea sekhomaretsi sa mouoane oa metsi ea PTFE ea sekhomaretsi e lekantsoe haholo-holo ke likoli (micropores, microcracks, fiber wicking) ho fapana le PTFE's intrinsic hydrophobicity. Filimi e hloekileng ea PTFE e fana ka WVTR e mahareng feela. Li-coat tse ngata le li-filler tsa lamellar (mica, li-flakes tsa khalase) li etsa hore ho be le phello ea labyrinth, e fokotsa haholo phetisetso ea mouoane. Bakeng sa ho tiisa mongobo o phahameng, totobatsa litlolo tse densified.

Creep resistance ea PTFE high-themperature sekhomareta tepi tlas'a nako e telele e sa khaotseng mojaro (haholo-holo ho 200-260 ° C) e khethoa ke lintlha tse peli: silicone PSA crosslink density (high crosslinking thibela phallo) le substrate mofuta (fiberglass-reinforced PTFE e hanyetsa serame creep; hloekileng PTFE filimi creeps). Sekhomaretsi se sa kopanngoeng se hloleha ka potlako mochesong o phahameng. Likhomaretsi tse teteaneng li eketsa kotsi ea ho ruruha.

Bakeng sa theipi e phahameng ea mocheso oa PTFE e sebelisoang lits'ebetsong tsa likhohlano tsa abrasive sliding, standard non-stick le mocheso o hanyetsang ha o lekana. Lintlha tsa bohlokoa tsa khetho: Taber abrasion tahlehelo (<15 mg/1000 cycles), e tlatsitsoeng PTFE coating (carbon/graphite/MoS₂), PV limit data, substrate strength (≥200 N/cm), le mating surface roughness (Ra 0.2-0.4 μm). Tšireletso e nepahetseng ea moeli le tlamahano e feletseng ke tsa bohlokoa bakeng sa bophelo bo bolelele.

PTFE substrate e hanela ho fafatsa letsoai ka tlhaho (ho monya metsi <0.01%). Leha ho le joalo, ts'ebetso ea theipi ka kakaretso e itšetlehile ka mofuta oa sekhomaretsi: silicone PSA e mamella maemo a leoatle (liteko tsa 500-1000h letsoai la spray,> 80% ho boloka lekhapetla); acrylic PSA e hloleha. Phekolo e nepahetseng ea holim'a metsi, kopo e se nang li-bubble, le ho tiisoa ka bohale ka silicone sealant ke tsa bohlokoa bakeng sa ho tšepahala ha nako e telele liforomong le likepeng tse lebōpong la leoatle.

Theipi ea fiberglass ea PTFE e hloka litifikeiti tse tharo tsa bohlokoa tsa polokeho: UL (polokeho ea motlakase le lelakabe), FDA (ho latela melao ea lijo), le ISO 9001:2015 (taolo ea boleng). Litheipi tse netefalitsoeng li fana ka ts'ebetso e ts'oanang, bophelo bo bolelele ba ts'ebeletso, le litšenyehelo tse tlase tsa beng ho sa tsotelehe litšenyehelo tse holimo tsa pele. Kamehla netefatsa litifikeiti ka kotloloho le mekhatlo e fanang ka thepa.

Theipi ea mocheso o phahameng oa PTFE e sebelisoa likarolong tse tharo tsa ts'ebeliso ea bongaka: ts'ireletso ea thepa ea ho thibela likokoana-hloko (literei tsa autoclave, pakete ea mocheso), phekolo ea holim'a lisebelisoa (sekontiri se tlaase, motlakase), le lisebelisoa tse kenngoeng (li-vascular grafts, sutures). Biocompatibility e netefatsoa ka ISO 10993, mme FDA 21 CFR 177.1550 e theha polokeho ea thepa ea motheo.

Theipi ea mocheso o phahameng oa PTFE e na le khanyetso e fokolang ea mahlaseli a ionizing. Ha motho a pepesehetse gamma ka 1 kGy feela, matla a ho tiea a theohela ho ~ 25% ea a mantlha. E loketse feela bakeng sa tikoloho ea tekanyo e tlaase (lijo / sterilization ea bongaka <10 kGy). Bakeng sa indasteri ea nyutlelie kapa sepakapaka, sebelisa polyimide kapa PEEK sebakeng sa eona.

Bakeng sa litheipi tse phahameng tsa mocheso oa PTFE tlas'a ho qoelisoa ka nako e telele, PTFE substrate e lula e sa sebetse ka lik'hemik'hale, empa lera la sekhomaretsi ke ntlha e fokolang. Metsi a fokolisa silicone PSA; metsi a letsoai a potlakisa ho bola. Bakeng sa lik'hemik'hale tse mabifi, li-adhesives tsa fluorosilicone kapa perfluoropolyether - kapa tepi ea PTFE e se nang sekhomaretsi - lia hlokahala. Ho lahleheloa ke matla ho fihla ho 40% ka mor'a lihora tse 48 ka metsing.

Theipi ea mocheso o phahameng oa PTFE e sebelisoang lits'ebetsong tsa ho kopana le lijo e tlameha ho lula ka har'a meeli ea mocheso e hlalositsoeng: ≤260 ° C bakeng sa tšebeliso e tsoelang pele, ≤300 ° C bakeng sa litlhōrō tse khutšoanyane (metsotso), 'me ha ho mohla e ka holimo ho 327 ° C (ho bola). Melao ea FDA le EU ha e hlalose moeli oa nako o akaretsang - nako e sireletsehileng ea ho ikopanya e itšetlehile ka mocheso 'me e tlameha ho netefatsoa ka liteko tsa ho falla tse etsisang maemo a sebele.

Thempereichara ea phetoho ea khalase (Tg) ea sekhomaretsi sa silicone se nang le khatello ea maikutlo e ka bang -120 ° C - e tlase haholo ho feta likhomaretsi tsa acrylic. Tg ena e tlase haholo e boloka tepi ea PTFE ea mocheso o phahameng e tenyetseha le ho khomarela esita le ho -70 ° C, e thibela ho phunyeha ha brittle le ho nolofalletsa ho khomarela ka botšepehi lits'ebetsong tsa cryogenic.