Theipi ea PTFE ea mocheso o pharaletseng e hloka silicone PSA e bolokang ho khomarela ho tloha -70°C ho ea ho 260°C. Lintlha tse ka sehloohong tsa moralo: primer-anchored transition layer (thibela delamination), sea-island microstructure (MQ resin Islands + polysiloxane continuous phase), gradient crosslinking (high-density inner layer for creep resistance, low-density out layer for low-temp tack), le heat-stabilized fillers (cerium resistance oxide). Phenyl-modified siloxane likarolo li hatella mocheso o tlase oa crystallization, o nolofalletsang ho fetoha ha maemo ka tlase ho -100 ° C.

Nakong ea ho roala ha theipi ea PTFE, sekhahla sa ho qhibiliha ha mokelikeli oa silicone-sensitive sekhomaretsi ke mokhoa oa bohlokoa oa ts'ebetso. Ho potlaka haholo → ho phunya letlalo, ho se lekane hantle, masoba a lithapo (sehlaseli se qabeletsoeng), le li-craters (ho koaheloa kapa ho susumetsoa ke tšilafalo). E lieha haholo → ho sisinyeha, mathōko a teteaneng, le ho ntša metsi ho PTFE ea matla a tlaase. Leano le nepahetseng: butle-butle ho fetoha butle-butle bakeng sa ho lekanya le ho phonyoha ha bubble, ebe ho potlakisa ho omisa bakeng sa sebopeho. Sebelisa metsoako e tsoakiloeng (toluene/xylene + e omisang ka potlako) le mocheso oa onto ea gradient (tlase → mahareng→ holimo).

Theipi ea mocheso o phahameng oa PTFE e lahleheloa ke ho khomarela ka mor'a hore e sebelisoe khafetsa ka lebaka la tšilafalo ea holim'a metsi (lerōle, oli ea silicone), ho hlōleha ho khomarela ho khomarela (masala), kapa bonding bo fokolang ba substrate. Litharollo: silicone e phahameng ea crosslink PSA (ho falla ho tlaase, ho leka-lekana / matla a ho tšoara), phekolo ea pele ho PTFE substrate, tšehetso e teteaneng ea fiberglass, le ho tšoara ka nepo (libaka tse hloekileng, lekhapetla le pholileng, 180 ° angle). Teko ea bongata e netefatsa ntlafatso.

Litheipi tsa PTFE tse nang le mocheso o phahameng oa mocheso tse bolokiloeng ka foromo ea moqolo li ka ba le bothata ba ho khomarela li-interlayer (thibelo) le ho fetisetsa sekhomaretsi ho lehlakoreng le sa khomarelang. Lisosa tsa metso: memori ea rekere ea filimi ea PTFE le silicone PSA e tsamaea tlas'a khatello le mocheso. Tharollo: tsitsipano ea matsoelintsoeke - e tiileng holim'a likarolo tse ka ntle, e hlephileng holim'a likarolo tse ka hare - ho sebelisa taolo ea tsitsipano e koetsoeng. E tlatselletsa ka ho roala ha metsi, polokelo e nepahetseng (15-40°C, 30-70% RH), ho beoa ka mokhoa o otlolohileng, le ho potoloha ha rolo ka kotara.

Theipi ea mocheso o phahameng oa PTFE e sebelisoang ho kopana le lijo e tlameha ho hlompha meeli e thata ea mocheso: ≤260 ° C bakeng sa tšebeliso e tsoelang pele (ha ho na moeli oa nako), 260-300 ° C ho fihlela metsotso ea 30 feela, le > 300 ° C e thibetsoe. Theipi ke ea puisano e sa tobang feela (li-tray liners, sealer sealer), eseng ho phuthela lijo ka kotloloho. Le ka mohla u se ke ua sebetsa ntle le moroalo oa lijo (ho futhumatsa ka metsi). E nke sebaka haeba e qhibilihile, e tšehla, kapa e tsofetse.

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 the (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 (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 laminator, mask a solder) le ho kenya letsoho nako e telele (sekoahelo sa libese, ho lokisa lebokose la matekoane). Bakeng sa tšebeliso e sa feleng ea ka hare, litheipi li tlameha ho feta IEC 61215: mocheso o mongobo oa 1000-2000h, UV, libaesekele tse futhumetseng (-40 ° C ho ea + 85 ° C), ka silicone PSA le shrinkage <1%.

Theipi ea PTFE e nang le mocheso o phahameng oa mocheso e sebelisoang ho lithipa tse koalang mocheso le lihlopha tsa ho tiisa li fana ka litekanyetso tse 'nè tsa motheo: e thibela ho khomarela polasetiki e qhibilihisitsoeng (e felisa nako ea ho theoha), e sireletsa ho koala ho 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 e 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.