Theipi ea PTFE bakeng sa phala ea lik'hemik'hale / sejana se thibelang ho bola, ho se thupeng, le ts'ireletso ea ho tiisa e hloka karoloana e ts'oanang, sistimi e khomarelang, le mecha ea litaba ea lik'hemik'hale. Silicone PSA e khothalletsoa 200-260 ° C ka li-acids / alkalis; acrylic PSA e hanela metsoako ea lintho tse hlapollang empa e fokotsa mocheso ho ≤150°C. Bakeng sa HF, ho belisa >80% alkali, kapa chlorine trifluoride, sebelisa lesela la PTFE-feela (ha ho sekhomaretsi sa organic). Bohlokoa: sekhomaretsi ke sehokelo se fokolang, eseng PTFE ka boeona.

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 mocheso-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 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.

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.

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 e lebelo le holimo.