PTFE high-temperature tapes khaws cia rau hauv daim ntawv yob tuaj yeem raug kev txom nyem los ntawm interlayer adhesion (blocking) thiab nplaum hloov mus rau sab tsis-stick. Hauv paus ua rau: PTFE zaj duab xis elastic nco thiab silicone PSA nkag mus rau hauv siab thiab kub. Kev daws: gradient winding nro - nruj ntawm txheej txheej, xoob ntawm sab hauv txheej - siv kaw-voj nro tswj. Ntxiv nrog rau kev tso tawm txheej, cia kom zoo (15-40 ° C, 30-70% RH), kab rov tav tso, thiab peb lub hlis twg yob tig.

PTFE high-temperature daim kab xev siv nyob rau hauv kev sib cuag nrog zaub mov yuav tsum hwm nruj nruj txwv kub: ≤260 ° C rau kev siv tas mus li (tsis muaj sij hawm txwv), 260-300 ° C mus txog 30 feeb xwb, thiab > 300 ° C txwv. Daim kab xev yog rau kev sib cuag ncaj qha nkaus xwb (cov tais ntim khoom, lub hau npog npog), tsis yog qhwv cov zaub mov ncaj qha. Tsis txhob ua haujlwm yam tsis muaj khoom noj khoom haus (qhuav cua sov). Hloov yog blistered, yellowed, los yog hnav.

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) 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 kev sib npaug siv cov khoom sib txuas lus ntxhib (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 daim kab xev siv nyob rau hauv abrasive zawv zawg kev sib txhuam daim ntaub ntawv, standard non-stick thiab tshav kub kuj tsis txaus. Cov txheej txheem xaiv tseem ceeb: Taber abrasion poob (<15 mg / 1000 cycles), hloov kho PTFE txheej (carbon / graphite / MoS₂), PV txwv cov ntaub ntawv, lub zog substrate (≥200 N / cm), thiab mating nto roughness (Ra 0.2-0.4 μm). Kev tiv thaiv ntug zoo thiab kev sib txuas tag nrho yog qhov tseem ceeb rau lub neej ntev.

PTFE substrate yog inherently ntsev tsuag resistant (dej nqus <0.01%). Txawm li cas los xij, kev ua tau zoo ntawm daim kab xev tag nrho yog nyob ntawm hom nplaum: silicone PSA tiv taus qhov chaw hauv hiav txwv (500-1000h ntsev tshuaj tsuag,> 80% tev tuav); Acrylic PSA ua tsis tiav. Kev kho saum npoo kom zoo, daim ntawv thov tsis muaj npuas, thiab ntug sealing nrog silicone sealant yog qhov tseem ceeb rau kev cia siab rau lub sijhawm ntev ntawm ntug dej hiav txwv thiab cov hlab ntsha.