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 ho tsubella, 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 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 e phahameng ea mocheso oa PTFE e lahleheloa ke ho khomarela ka mor'a ho sebelisoa khafetsa ka lebaka la tšilafalo ea holim'a metsi (lerōle, oli ea silicone), ho hloleha ho kopanngoa ha sekhomaretsi (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 holim'a substrate ea PTFE, tšehetso e teteaneng ea fiberglass, le ho tšoara hantle (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 premium ho fihlela likhoeling tsa 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 ha 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 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.