PTFE high-temperature daim kab xev muaj cov tshuaj ntsev zoo heev, tab sis cov ntsiab lus tsis muaj zog yog cov nplaum txheej thiab cov fiberglass substrate npoo. Kev soj ntsuam txoj kev: 1000h nruab nrab ntsev tshuaj tsuag (NSS), ntsuas tev lub zog tuav (≥80% xav tau), pom qhov tsis xws luag (lifting, blistering), thiab hlau substrate corrosion. Rau cov chaw hauv dej hiav txwv thiab cov ntsev-npaum huab cua: siv silicone PSA (tsis yog acrylic), tag nrho impregnated PTFE substrate, foob npoo nrog huab cua-resistant sealant, thiab siv primer rau cov hlau nto.

Silicone siab-sensitive adhesives (PSA) rau PTFE high-temperature tapes sib txawv nyob rau hauv high-temperature aging kev ua tau zoo. Methylphenyl silicone PSA khaws> 85% tev lub zog tom qab 250 ° C / 7 hnub, thaum tus qauv methyl poob rau 50-70%. Ntxiv-kho (hydrosilylation) cov tshuab muaj kev ruaj ntseg zoo dua li peroxide-kho. Txhawm rau txuas ntxiv 200 ° C + kev pabcuam, xaiv cov qib siab-phenyl-kho ntxiv.

Thermally conductive PTFE Pressure-sensitive Adhesive (PSA) tapes yuav tsum ua kom sov thaum nyob nplaum. Ntxiv cov fillers txhim kho thermal conductivity tab sis mob adhesion. Qhov zoo tshaj plaws sib npaug siv spherical coarse hais (raws li cov pob txha conductive) sib xyaw nrog cov khoom zoo (kom sau cov voids), ua kom tag nrho cov muab tub lim loading saum toj kawg nkaus qhov pib percolation. Tsis txhob flakes thiab fibers; lawv tua tack.

PTFE high-temperature daim kab xev ua haujlwm rau PV kev lag luam hauv ob lub luag haujlwm sib txawv: cov txheej txheem siv tau (tiv thaiv EVA overflow adhesion ntawm laminators, solder mask) thiab lub neej ntev rwb thaiv tsev (busbar qhwv, junction box fixation). Rau kev siv mus tas li, cov ntaub nplaum yuav tsum dhau IEC 61215: 1000-2000h damp cua sov, UV, thermal cycling (-40 ° C txog + 85 ° C), nrog silicone PSA thiab shrinkage <1%.

PTFE high-temperature daim kab xev siv rau tshav kub-sealing riam thiab sealing strips muab plaub lub ntsiab tseem ceeb: tiv thaiv molten yas adhesion (tso tseg downtime), tiv thaiv kim sealing tuag, homogenizes tshav kub / siab rau zoo seals, thiab txo cov zaj duab xis kev sib txhuam. Fiberglass-backed daim kab xev (0.13-0.25 mm) nrog silicone PSA (≥260 ° C) yog pom zoo. Anti-static dub daim kab xev rau high-speed kab.

Cov dej vapor barrier cov cuab yeej ntawm PTFE nplaum daim kab xev yog txiav txim siab feem ntau los ntawm txheej tsis xws luag (micropores, microcracks, fiber wicking) es tsis yog PTFE's intrinsic hydrophobicity. Pure PTFE zaj duab xis tsuas yog nruab nrab WVTR. Multi-txheej txheej thiab lamellar fillers (mica, iav flakes) tsim ib tug labyrinth nyhuv, drastic txo vapor kis tau tus mob. Rau high-humidity sealing, qhia densified txheej.

Creep kuj ntawm PTFE high-temperature adhesive daim kab xev nyob rau hauv lub sij hawm ntev load (tshwj xeeb tshaj yog nyob rau ntawm 200-260 ° C) yog txiav txim los ntawm ob yam: silicone PSA crosslink ceev (siab dua crosslinking tiv thaiv ntws) thiab substrate hom (fiberglass-reinforced PTFE resists txias creeps; ntshiab PTFE zaj duab xis creeps). Uncrosslinked nplaum ua tsis tau sai thaum kub kub. Thicker nplaum txheej ua rau muaj kev pheej hmoo nkag.

Rau PTFE high-temperature tapes nyob rau hauv lub sij hawm ntev immersion, PTFE substrate tseem chemically inert, tab sis cov nplaum txheej yog qhov tsis muaj zog. Dej tsis muaj zog silicone PSA; dej ntsev accelerates corrosion. Rau cov tshuaj phem, fluorosilicone los yog perfluoropolyether adhesives - los yog adhesive-dawb PTFE daim kab xev - yuav tsum tau. Peel lub zog poob mus txog 40% tom qab 48 teev hauv dej.

PTFE high-temperature daim kab xev yuav tsum tau cia kom zoo kom nws adhesion, yooj, thiab tso tawm kev ua tau zoo. Cov kev cai tseem ceeb suav nrog kev tswj qhov kub thiab txias (10-30 ° C), cov av noo qis dua 60%, kev zam lub teeb, kev cais tshuaj lom neeg, qhov chaw ntsug, thiab qhov cua. Ua raws li FIFO kev tswj cov khoom muag thiab tshuaj xyuas tsis tu ncua.

Cov iav hloov pauv kub (Tg) ntawm silicone siab-rhiab nplaum nplaum yog nyob ib ncig ntawm -120 ° C - qis dua li acrylic nplaum. Qhov no ultra-low Tg khaws PTFE high-temperature daim kab xev hloov tau yooj yim thiab nplaum txawm nyob rau ntawm -70 ° C, tiv thaiv nkig tawg thiab ua kom muaj kev ruaj ntseg adhesion hauv cov ntawv thov cryogenic.