Theipi ea boemo ba bongaka ea PTFE e nang le mocheso o phahameng o kopanya biocompatible PTFE substrate le sekhomaretsi sa silicone se phekotsoeng ka platinum. Lintlha tsa bohlokoa: ISO 10993 e lumellana (ha e na cytotoxicity, sensitization, kapa ho teneha), e mamella sterilization e pheta-phetoang (mouoane / EO / gamma), ho hanyetsa mocheso oa 260 ° C. Mehato ea bohlokoa ea ho itšireletsa: e se ke ea feta 260 ° C (mosi o chefo o ka holimo ho 300 ° C), mahlaseli a gamma a ka 'na a etsa hore a fokotsehe, a netefatse mekhoa ea ho thibela likokoana-hloko,' me a kope litokomane tsa ho lumellana ka botlalo (litlaleho tsa ISO 10993, MSDS, lintlha tsa botsofali). Eseng bakeng sa tšebeliso ea mali e tobileng kapa e kentsoeng ntle le haeba e netefalitsoe ka ho toba.

PTFE theipi reusability e itšetlehile ka lintlha tse 'nè: sebopeho sa sekhomaretsi (high crosslink density, low silicone migration, microphase structure for repositionable tack), substrate anchoring (surface activation + primer ho thibela phetisetso e feletseng ea sekhomaretsi), ho roala ka morao (ho lokolla lesela ho sireletsa sekhomaretsi nakong ea ho phutholoha), le ho tšoara ka nepo (sekhomaretsi se hloekileng, ho qoba sekhomaretsi se nepahetseng). Likhomaretsi tse fetotsoeng tse hlatsuoang ka metsi li ka hlaphoheloa> 90% tack kamora ho hloekisoa.

Fiberglass lesela thermal shrinkage ke sesosa se ka sehloohong sa PTFE tepi dimensional ho se tsitse. Ho PTFE sintering thempereichara (360-400 ° C), masala a loha khatello ea kelello e lokolloa. Haeba e sa thibeloe, lesela lea fokotseha; haeba e thibetsoe, khatello ea kelello e patehileng e koaletsoe, e bakang ho fokotseha ha morao nakong ea ho phekola ka sekhomaretsi (150-200 ° C) le ho futhumatsa ho qetela. Tharollo: sebelisa fiberglass e behiloeng pele ho mocheso e nang le <0.5% shrinkage ho 400 ° C, ho felisa khatello ea kelello e setseng pele u roala.

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.

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 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.