PTFE matepi kutentha kwambiri osungidwa mu mpukutu mawonekedwe akhoza kuvutika interlayer adhesion (kutsekereza) ndi zomatira kusamutsira ku mbali yopanda ndodo. Zomwe zimayambitsa: PTFE filimu zotanuka kukumbukira ndi silikoni PSA zikwawa pansi pa mavuto ndi kutentha. Yankho: Kumangika kwa gradient - zolimba pazigawo zakunja, zomasuka m'kati mwake - pogwiritsa ntchito kuwongolera kotseka. Kuthandizira ndi zokutira zotulutsa, kusungirako koyenera (15-40°C, 30-70% RH), kuyika kopingasa, ndi kuzungulira kotala.

Tepi ya PTFE yotentha kwambiri yomwe imagwiritsidwa ntchito pokhudzana ndi chakudya iyenera kulemekeza malire a kutentha: ≤260 ° C kuti agwiritsidwe ntchito mosalekeza (palibe malire a nthawi), 260-300 ° C kwa mphindi 30 zokha, ndipo > 300 ° C ndizoletsedwa. Tepiyo ndi yongolumikizana mosalunjika kokha (ma tray liners, heat sealer covers), osati kukulunga chakudya mwachindunji. Osagwira ntchito popanda kuchuluka kwa chakudya (kutentha kowuma). Bwezerani ngati matuza, achikasu, kapena ovala.

Zomatira zomatira za silicone (PSA) za PTFE matepi otentha kwambiri zimasiyana kwambiri pakukalamba kotentha kwambiri. Methylphenyl silicone PSA imasungabe> 85% mphamvu ya peel pambuyo pa 250 ° C/7 masiku, pomwe mtundu wa methyl umatsikira mpaka 50-70%. Machitidwe owonjezera (hydrosilylation) amapereka kukhazikika kwabwinoko kuposa kuchiritsidwa ndi peroxide. Pantchito yopitilira 200°C+, sankhani magiredi apamwamba aphenyl owonjezera.

Thermally conductive PTFE pressure-sensitive adhesive adhesive (PSA) matepi ayenera kuchititsa kutentha pamene akumamatira. Kuwonjezera ma fillers kumapangitsa kuti matenthedwe azitha koma kumapweteka kumamatira. Mulingo woyenera kwambiri umagwiritsa ntchito tinthu tating'ono tozungulira (monga ma skeleton oyendetsa) osakanikirana ndi tinthu tating'onoting'ono (kudzaza ma voids), kusungitsa zodzaza zonse pamwamba pa chigawo cha percolation. Pewani flakes ndi ulusi; amapha zingwe.

Tepi ya PTFE yotentha kwambiri imathandizira makampani a PV m'maudindo awiri osiyana: njira zogwiritsira ntchito (zimaletsa kumatira kwa EVA kusefukira pa laminator, chigoba cha solder) ndi kusungunula kwa moyo wautali (kukulunga kwa mabasi, kukonza bokosi lolumikizana). Kuti mugwiritse ntchito kosatha mkati, matepi ayenera kudutsa IEC 61215: 1000-2000h kutentha kwachinyezi, UV, njinga yamoto yotentha (-40 ° C mpaka + 85 ° C), ndi silikoni PSA ndi shrinkage <1%.

Tepi ya PTFE yotentha kwambiri yomwe imagwiritsidwa ntchito pamipeni yosindikiza kutentha ndi zomangira zosindikizira zimapereka mfundo zinayi zazikuluzikulu: zimateteza kumamatira kwa pulasitiki yosungunuka (kuchotsa nthawi yopuma), kumateteza kusindikiza kokwera mtengo, kumapangitsa kutentha / kupanikizika kwa zisindikizo zosasinthasintha, ndi kuchepetsa kukangana kwa filimu. Fiberglass-backed tepi (0.13-0.25 mm) yokhala ndi silicone PSA (≥260 ° C) ikulimbikitsidwa. Anti-static wakuda tepi ya mizere yothamanga kwambiri.

The madzi nthunzi chotchinga katundu wa PTFE zomatira tepi anatsimikiza makamaka ndi ❖ kuyanika zolakwika (micropores, microcracks, CHIKWANGWANI wicking) osati PTFE a intrinsic hydrophobicity. Filimu yoyera ya PTFE imapereka WVTR yapakatikati yokha. Mipikisano wosanjikiza zokutira ndi lamellar fillers (mica, magalasi flakes) amapanga labyrinth zotsatira, kuchepetsa kwambiri kufala kwa nthunzi. Kuti musindikize chinyezi chambiri, tchulani zokutira zolimba.

Kukana kwa PTFE kutentha kwapamwamba kwambiri kwa tepi yomatira pansi pa katundu wanthawi yayitali (makamaka pa 200-260 ° C) kumatsimikiziridwa ndi zinthu ziwiri: silicone PSA crosslink density (high crosslinking imalepheretsa kutuluka) ndi mtundu wa gawo lapansi (fiberglass-reinforced PTFE imatsutsa kuzizira kozizira; filimu yoyera ya PTFE imakwawa). Zomatira zosagwirizana zimalephera mwachangu pakutentha kwakukulu. Zomata zokhuthala zimawonjezera chiopsezo chokwera.

Pakuti PTFE mkulu-kutentha tepi ntchito abrasive kutsetsereka mikangano ntchito, muyezo sanali ndodo ndi kutentha kukana ndizosakwanira. Zosankha zofunika kwambiri: Taber abrasion loss (<15 mg/1000 cycles), yodzaza PTFE yosinthidwa (carbon/graphite/MoS₂), PV limit data, substrate strength (≥200 N/cm), ndi mating pamwamba roughness (Ra 0.2-0.4 μm). Chitetezo chokwanira m'mphepete ndi mgwirizano wonse ndizofunikira kuti mukhale ndi moyo wautali.

Gawo laling'ono la PTFE ndilosamva kupopera kwa mchere (mayamwidwe amadzi <0.01%). Komabe, ntchito ya tepi yonse imadalira mtundu womatira: silikoni PSA imalimbana ndi malo am'madzi (500-1000h mayeso opopera mchere,> 80% kusunga peel); acrylic PSA amalephera. Kusamalira bwino pamtunda, kugwiritsa ntchito zopanda thovu, ndi kusindikiza m'mphepete ndi silicone sealant ndizofunikira kuti mukhale odalirika kwa nthawi yayitali pamapulatifomu ndi zombo zapanyanja.