Sebopeho sa sefahleho se sehiloeng sa tepi ea PTFE ea mocheso o phahameng se ama ka ho toba sekhomaretsi le ho phahamisa bohale nakong ea kopo. Ho petsoha ho fosahetseng (mahare a lerootho, angle e sa nepahalang) ho etsa likhoele tsa sekhomaretsi, ho tšesaane lera la sekhomaretsi, 'me ho pepese metsu ea khalase ea fiberglass - e lebisang ho putlama, ho fokola ho tlamahaneng le ho phahamisa mocheso kapa tsitsipano. Lifahleho tse sa tloaelehang tsa ho qetela (li-wavy, tse hlahelletseng) li baka khatello e sa lekaneng, ho khanna sekhomaretsi nakong ea polokelo. Sefahleho se setle sa ho qetela se boreleli, se phunya, 'me ha se na tšenyo - se sebetsa joalo ka tiiso e notlelang sekhomaretsi le ho tiisa hore ho tlamahane ka botlalo.

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 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 lengata 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.

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.

Theipi ea PTFE e phahameng ea mocheso e bolokiloeng tlas'a maemo a boletsoeng (10-25 ° C, 40-70% RH, hole le UV / khatello e boima) e na le nako e tloaelehileng ea nako ea likhoeli tse 3-6 (limaraka tsa pele ho fihlela likhoeli tse 12). Meetlo ea bohlokoa ea ho senyeha: matla a peel ha aa lokela ho theoha ka tlase ho 70% ea boleng ba pele; ha ho na masala a sekhomaretsi ka mor'a ho tlosoa ha mocheso o phahameng; ha ho carbonization kapa cracking ka mocheso rated. Licheke tse potlakileng: maikutlo a ho phutholoha ka letsoho, tlhahlobo ea masalla a 260°C, le teko ea ho honyela ha lamination.

Theipi e phuthetsoeng ea PTFE e ka hlahisa li-interlayer adhesion (thibela) le phetiso ea sekhomaretsi nakong ea polokelo ea nako e telele. Lisosa: memori ea memori ea filimi ea PTFE le silicone PSA e tsamaea ka tlas'a khatello / mocheso. Thibelo: gradient winding tension (ka ntle ho tiea, ka hare ho hlephileng) nakong ea tlhahiso, hammoho le ho roala ha letlalo lehlakoreng le sa khomarelang. Boloka ho -15 ° C ho ea ho 40 ° C, 30-70% RH, ka mokhoa o otlolohileng holim'a li-racks, rotate rolls ka kotara. Bakeng sa limaraka tse teteaneng tsa sekhomaretsi, eketsa pampiri ea tokollo lipakeng tsa lihlopha.

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 (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.