PTFE kasɛt si ƒe dzoxɔxɔ keke ta hiã silicone PSA si léa nuléle ɖe te tso -70°C va ɖo 260°C. Nu vevi siwo le aɖaŋuwɔwɔ me: primer-anchored transition layer (xea mɔ na delamination), atsiaƒu-ƒukpo microstructure (MQ resin ƒukpowo + polysiloxane continuous phase), gradient crosslinking (high-density ememe ƒuƒoƒo na creep tsitretsitsi, low-density gota ƒuƒoƒo na low-temp tack), kple dzoxɔxɔ-si li ke fillers (cerium oxide na oxidation tsitretsitsi). Siloxane ƒe akpa siwo ŋu wotrɔ asi le kple phenyl tea dzoxɔxɔ si mebɔ o ƒe kristalowɔwɔ ɖe to, si wɔnɛ be woate ŋu atrɔ ɖe nɔnɔmewo ŋu le -100°C te.

Le PTFE tape coating me la, solvent volatilization rate of silicone pressure-sensitive adhesive nye dɔwɔwɔ ƒe nɔnɔme vevi aɖe. Kabakaba akpa → ŋutigbalẽ ƒe ʋuʋu le anyigba dzi, eƒe anyigba ƒe ƒuƒuiƒe nyuie o, pinholes (trepped solvent), kple craters (condensation alo contaminant-induced). Blewu akpa → sagging, eƒe gowo le ɣie, kple dewetting le low-surface-energy PTFE dzi. Mɔnu nyuitɔ kekeake: blewu gbãtɔ ƒe dzoxɔxɔ hena dzidzenu kple bubble si, emegbe kabakaba ƒuƒu hena nɔnɔmewɔwɔ. Zã atike siwo wotsaka (toluene/xylene + esi ƒuna kabakaba) kple dzodoƒe ƒe dzoxɔxɔ si le tɔtrɔm (si le bɔbɔe→ti titina→kɔkɔ).

PTFE ƒe dzoxɔxɔ gã ƒe tape megaléna ɖe eŋu o le eŋudɔwɔwɔ enuenu megbe le ɖiƒoƒo si le anyigba dzi (ke, silicone ami), adhesive cohesive ƒe kpododonu (nu susɔe), alo substrate ƒe kadodo si gbɔdzɔ ta. Egbɔkpɔnuwo: high-crosslink silicone PSA (ʋuʋudedi si bɔbɔ, tack/holding ŋusẽ si da sɔ), primer ƒe atikewɔwɔ ɖe PTFE substrate dzi, dense fiberglass megbedede, kple eŋudɔwɔwɔ nyuie (anyigba siwo le dzadzɛ, peel fafɛ, 180° angle). Agbɔsɔsɔme dodokpɔ ɖoa ​​kpe ŋgɔyiyi dzi.

PTFE dzoxɔxɔ gã ƒe kasɛt siwo wodzra ɖo ɖe agbalẽ xatsaxatsa ƒe nɔnɔme me ate ŋu akpe fu le interlayer adhesion (blocking) kple adhesive transfer yi non-stick akpa. Nusiwo gbɔ wòtsona: PTFE film elastic memory kple silicone PSA creep le nyaƒoɖeamenu kple dzoxɔxɔ te. Egbɔkpɔnu: gradient winding tension – sesĩe le gotagome ƒuƒoƒo dzi, loose le ememe ƒuƒoƒo dzi – zã closed-loop tension control. Kpe ɖe eŋu kple asiɖeɖe le nu ŋu ƒe nutsyɔtsyɔ, nudzraɖoƒe nyuie (15-40°C, 30-70% RH), eɖoɖo ɖe tsia dzi, kple agbalẽ xatsaxatsa ƒe tɔtrɔ le ɣleti etɔ̃ ɖesiaɖe me.

Ele be PTFE ƒe dzoxɔxɔ gã ƒe kasɛt si wozãna le nuɖuɖu ƒe kadodo me nade bubu dzoxɔxɔ ƒe seɖoƒe sesẽwo ŋu: ≤260°C na zazã atraɖii (ɣeyiɣi aɖeke meli o), 260-300°C hena miniti 30 ko, eye wode se ɖe >300°C nu. Tepe la nye na kadodo si metso tẽ o ko (tray liners, heat sealer covers), ke menye nuɖuɖu babla tẽ o. Mègawɔ dɔ nuɖuɖu ƒe agba manɔmee gbeɖe o (dzoxɔxɔ ƒuƒu). Tsɔe ɖɔ li ne ʋuʋudedi, ɣie, alo vuvu.

Silicone pressure-sensitive adhesives (PSA) na PTFE dzoxɔxɔ gã ƒe kasɛtwo to vovo ŋutɔ le dzoxɔxɔ gã ƒe tsitsi ƒe dɔwɔwɔ me. Methylphenyl silicone PSA léa >85% ƒe lãgbalẽ ƒe ŋusẽ ɖe te le 250°C/ŋkeke 7 megbe, esime methyl ƒomevi si wozãna ɖaa la ɖiɖina va ɖoa 50-70%. Addition-cured (hydrosilylation) systems naa liƒo nyuitɔ sã wu peroxide-cured. Ne èdi be yeawɔ dɔ le 200°C+ si yia edzi la, tia phenyl ƒe dzesi siwo wotsɔ kpe ɖe wo ŋu siwo woda gbe le.

Ele be dzoxɔxɔ ƒe PTFE pressure-sensitive adhesive (PSA) tapes nakplɔ dzoxɔxɔ esime wole ƒoƒom. Fillers tsɔtsɔ kpe ɖe eŋu nana dzoxɔxɔ ƒe tsɔtsɔme nyona ɖe edzi gake egblẽa nu le adhesion ŋu. Dadasɔ nyuitɔ zãa nu suesuesue siwo le dzogoe ene me siwo le ƒuƒuie (abe ƒunukpeƒe si kplɔa nu ene) siwo wotsɔ tsaka kple nusue suesuesuewo (be woatsɔ ayɔ teƒe siwo le ƒuƒlu me), si wɔnɛ be agba si wotsɔ yɔa nuawo katã me nɔa tsi si sina toa eme ƒe dzidzenua dzi vie. Ƒo asa na flakes kple fibers; wowua tack.

PTFE dzoxɔxɔ gã tape subɔa PV dɔwɔƒea le akpa vovovo eve me: dɔwɔwɔ consumable (xea mɔ na EVA overflow adhesion le laminators, solder mask) kple agbe didi xɔxlɔ̃ (busbar wrap, junction box fixation). Be woazã ememe tegbee la, ele be kasɛtwo nato IEC 61215: 1000-2000h dzoxɔxɔ si me tsi le, UV, dzoxɔxɔ ƒe tsatsam (-40°C va ɖo +85°C), kple silicone PSA kple shrinkage <1%.

PTFE ƒe dzoxɔxɔ gã ƒe kasɛt si wotsɔ dea dzoxɔxɔ-nutrenu hɛwo kple nutrenu ƒe kakɛwo ŋu naa asixɔxɔ vevi ene: xea mɔ na plastik si wotsɔ ƒo ƒu ƒe ƒoƒo (eɖea ɣeyiɣi si me womewɔa dɔ o ɖa), ekpɔa nutrenu siwo xɔ asi ta, enaa dzoxɔxɔ/nyaƒoɖeamenu ɖeka hena nutrenu siwo nɔa anyi ɖaa, eye wòɖea film ƒe ʋuʋu dzi kpɔtɔna. Wokafui be woatsɔ fiberglass-backed tape (0.13-0.25 mm) si me silicone PSA (≥260°C) le. Anti-static black tape na fli siwo zɔna kabakaba.

Wokpɔa tsi ƒe dzoxɔxɔ mɔxenu ƒe nɔnɔme si le PTFE adhesive tape ŋu koŋ to nutsyɔnu ƒe gbɔdzɔgbɔdzɔwo (micropores, microcracks, fiber wicking) me tsɔ wu PTFE ƒe intrinsic hydrophobicity. Pure PTFE film naa WVTR si le titina ko. Multi-layer coating kple lamellar fillers (mica, glass flakes) wɔa labyrinth effect, si ɖea yaƒoƒo ƒe kaka dzi kpɔtɔna ŋutɔ. Ne èdi be yeatsɔ nutrenu si me fafa le ŋutɔ la, gblɔ nusiwo woatsɔ atsyɔ nu wo dzi siwo me wode tsii.