PTFE high-temperature daim kab xev poob adhesion tom qab rov siv dua vim qhov chaw paug (plua plav, silicone roj), nplaum cohesive tsis ua hauj lwm (residue), los yog tsis muaj zog substrate bonding. Cov kev daws teeb meem: high-crosslink silicone PSA (tsis tshua muaj kev tsiv teb tsaws, sib npaug tack / tuav lub zog), primer kev kho mob ntawm PTFE substrate, ntom fiberglass backing, thiab tuav kom zoo (huv qhov chaw, txias tev, 180 ° lub kaum sab xis). Quantitative test validates kev txhim kho.

PTFE high-temperature daim kab xev khaws cia nyob rau hauv tej yam kev mob (10-25 ° C, 40-70% RH, deb ntawm UV / hnyav siab) muaj ib tug txheej txheem txee lub neej ntawm 3-6 lub hlis (khoom kim heev qib mus txog 12 lub hlis). Qhov tseem ceeb degradation pib: tev lub zog yuav tsum tsis txhob poob qis dua 70% ntawm tus nqi pib; tsis muaj nplaum residue tom qab tshem tawm qhov kub thiab txias; tsis muaj carbonization los yog tawg ntawm qhov ntsuas kub. Kev kuaj xyuas sai: phau ntawv qhia kev xav tsis zoo, 260 ° C qhov kev sim residue, thiab kev sim lamination shrinkage.

Rolled PTFE daim kab xev tuaj yeem tsim interlayer adhesion (blocking) thiab nplaum hloov mus rau lub sijhawm ntev cia. Ua rau: PTFE zaj duab xis elastic nco thiab silicone PSA nkag rau hauv siab / cua sov. Kev tiv thaiv: gradient winding nro (sab nruj, sab hauv xoob) thaum lub sij hawm tsim khoom, ntxiv rau kev tso tawm txheej rau sab tsis-nplaum. Khaws ntawm -15 ° C mus rau 40 ° C, 30-70% RH, kab rov tav ntawm racks, tig rolls peb lub hlis twg. Rau cov qib nplaum tuab, ntxiv cov ntawv tso tawm ntawm cov khaubncaws sab nraud povtseg.

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) 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.