Theipi ea PTFE e nang le mocheso o phahameng o na le khanyetso e ntle ka ho fetisisa ea letsoai, empa lintlha tse fokolang ke lera la sekhomaretsi le likarolo tsa fiberglass substrate. Mekhoa ea ho hlahloba: Teko ea 1000h e sa nke lehlakore ea letsoai (NSS), ho lekanya ho boloka matla a lekhapetla (≥80% e hlokahalang), bofokoli ba pono (ho phahamisa, ho phatloha), le ho bola ha tšepe ea tšepe. Bakeng sa tikoloho ea leoatle le letsoai le nang le moholi o phahameng: sebelisa silicone PSA (eseng acrylic), substrate ea PTFE e kentsoeng ka ho feletseng, koala likarolo tse nang le sekontiri se hanyetsanang le boemo ba leholimo, 'me u sebelise primer holim'a tšepe.

Li-silicone tse nang le khatello ea maikutlo (PSA) bakeng sa litheipi tsa PTFE tsa mocheso o phahameng li fapana haholo ka ts'ebetso ea ho tsofala e phahameng ea mocheso. Methylphenyl silicone PSA e boloka> 85% matla a peel ka mor'a matsatsi a 250 ° C / 7, ha mofuta o tloaelehileng oa methyl o theohela ho 50-70%. Litsamaiso tsa tlatsetso (hydrosilylation) li fana ka botsitso bo betere ho feta pheko ea peroxide. Bakeng sa ts'ebeletso e tsoelang pele ea 200°C+, khetha limaraka tse phahameng tsa phenyl tse phekotsoeng.

Thermally conductive PTFE pressure-sensitive adhesive (PSA) litheipi li tlameha ho tsamaisa mocheso ha li ntse li khomarela. Ho eketsa li-filler ho ntlafatsa conductivity ea mocheso empa ho senya ho khomarela. Ho leka-lekana ho nepahetseng ho sebelisa likaroloana tse chitja tse mahoashe (joalo ka skeleton e tsamaisang) e kopantsoeng le likaroloana tse ntle (ho tlatsa li-voids), ho boloka li-filler li tletse ka holim'a moeli oa percolation. Qoba li-flakes le likhoele; ba bolaea hlaba.

Theipi ea mocheso o phahameng oa PTFE e sebeletsa indasteri ea PV ka likarolo tse peli tse fapaneng: ts'ebetso e ka sebelisoang (e thibela ho khomarela ha EVA ho phalla ho li-laminator, mask a solder) le ho kenngoa ha nako e telele (ho phuthela ka libese, ho lokisa lebokose la maballo). Bakeng sa tšebeliso e sa feleng ea ka hare, litheipi li tlameha ho feta IEC 61215: mocheso o mongobo oa 1000-2000h, UV, libaesekele tsa mocheso (-40 ° C ho + 85 ° C), ka silicone PSA le shrinkage <1%.

Theipi ea PTFE ea mocheso o phahameng e sebelisoang ho lithipa tse koalang mocheso le likhoele tsa ho koala li fana ka litekanyetso tse 'nè tsa motheo: e thibela ho khomarela polasetiki e qhibilihisitsoeng (e felisa nako ea ho theoha), e sireletsa ho tiisa ho shoa ha theko e boima, ho etsa homogenizes mocheso / khatello ea litiiso tse tsitsitseng, le ho fokotsa khohlano ea filimi. Fiberglass-backed tape (0.13-0.25 mm) e nang le silicone PSA (≥260 ° C) e khothalletsoa. Theipi e ntšo ea anti-static bakeng sa mela ea lebelo le holimo.

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 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 hloka polokelo e nepahetseng ho boloka sekhomaretsi sa eona, ho feto-fetoha ha maemo, le ts'ebetso ea tokollo. Litlhoko tsa bohlokoa li kenyelletsa taolo ea mocheso (10-30 ° C), mongobo o ka tlase ho 60%, ho qoba khanya, ho itšehla thajana ka lik'hemik'hale, ho beoa ka kotloloho le moea. Latela tsamaiso ea thepa ea FIFO 'me u hlahlobe khafetsa.

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.