Thepi ya mahiselo yale henhla ya PTFE yina ku tiya ka kahle swinene ka munyu, kambe tindzhawu letinga tsana i leyara yo namarhela xikan’we na makumu ya fiberglass substrate. Maendlelo yo kambela: 1000h neutral salt spray (NSS) test, ku pima ku khomiwa ka matimba ya peel (≥80% swa laveka), ku tsandzeka ku vona (ku tlakusa, ku pfimba), na metal substrate corrosion. Eka tindzhawu tale lwandle na letingana nkungu wa munyu wotala: tirhisa silicone PSA (hayi acrylic), PTFE substrate leyi cheriweke hiku hetiseka, pfalela makumu hi sealant leyinga tiyisela maxelo, naswona chela primer eka swiphemu swa nsimbi.

Ti silicone pressure-sensitive adhesives (PSA) ta ti PTFE ta tithepi ta mahiselo yale henhla ti hambana swinene eka matirhelo ya ku dyuhala ka mahiselo yale henhla. Methylphenyl silicone PSA yi hlayisa >85% wa matimba ya peel endzhaku ka 250°C/7 wa masiku, kasi muxaka wa standard methyl wu hunguteka kuya eka 50-70%. Tisisiteme leti horisiweke hi addition-cured (hydrosilylation) tinyika kutshamiseka ko antswa swinene kutlula leti tshunguriweke hi peroxide. Eka vukorhokeri lebyi yaka emahlweni bya 200°C+, hlawula ti grade ta high-phenyl leti horisiweke hi ku engeteriwa.

Tithepi ta PTFE pressure-sensitive adhesive (PSA) leti fambisaka ku hisa tifanele ku fambisa kuhisa loko titshama tirikarhi ti namarhela. Ku engetela ti fillers swiantswisa thermal conductivity kambe swivavisa ku namarhela. Optimal balance yitirhisa spherical coarse particles (tani hi conductive skeleton) leyi hlanganisiweke na ti fine particles (ku tata ti voids), ku hlayisa total filler loading ehenhla nyana ka percolation threshold. Papalata swiphepherhele ni tifibre; va dlaya tack.

Thepi ya mahiselo yale henhla ya PTFE yi tirhela indasitiri ya PV eka swiphemu swimbirhi swohambana: process consumable (yi sivela ku namarhela ka EVA overflow eka ti laminators, solder mask) na insulation ya vutomi byo leha (busbar wrap, junction box fixation). Ku tirhisiwa endzeni ka nkarhi hinkwawo, tithepi tifanele ku hundza eka IEC 61215: 1000-2000h damp heat, UV, thermal cycling (-40°C kuya eka +85°C), na silicone PSA na shrinkage <1%.

Thepi ya mahiselo yale henhla ya PTFE leyi cheriweke eka mabanga yo hisa na swiphemu swo pfalela yi tisa mimpimo ya mune ya nkoka: yi sivela ku namarhela ka plastiki leyi n’okiweke (yi herisa nkarhi wo yima), yi sirhelela ti dies to pfalela to durha, yi homogenizes ku hisa/ntshikelelo eka swipfalo leswi nga cincekiki, naswona yi hunguta ku hlangana ka filimi. Thepi leyi seketeriweke hi fiberglass (0.13-0.25 mm) leyingana silicone PSA (≥260°C) ya hlohleteriwa. Thepi ya ntima ya anti-static ya milayeni ya rivilo lerikulu.

Nhundzu ya water vapor barrier ya PTFE adhesive tape yikumiwa ngopfu hi swihoxo swa coating (micropores, microcracks, fibre wicking) kutlula PTFE’s intrinsic hydrophobicity. Pure PTFE film yi nyika ntsena WVTR ya le xikarhi. Multi-layer coating na lamellar fillers (mica, glass flakes) swiendla leswaku kuva na labyrinth effect, leswi hungutaka swinene ku hundziseriwa ka vapor. Eka ku pfariwa ka ndzhongho wale henhla, boxa swifunengeto leswi tsindziyeleke.

Ku tiya ka creep ka PTFE high-temperature adhesive tape ehansi ka ndzhwalo wa nkarhi woleha lowu nga cinciki (ngopfu ngopfu eka 200-260°C) swikumiwa hi swilo swimbirhi: silicone PSA crosslink density (crosslinking yale henhla yi sivela ku khuluka) na muxaka wa substrate (fiberglass-reinforced PTFE yi lwisana na cold creep; pure PTFE film creeps). Xinamarheti lexi nga crosslinked xi tsandzeka hi ku hatlisa loko ku hisa ngopfu. Ti layers to namarhela leti tiyeke ti engetela khombo ra creep.

Eka ti tapes ta PTFE ta mahiselo yale henhla ehansi ka ku nyuperisiwa ka nkarhi woleha, substrate ya PTFE yitshama yirikarhi yinga tirhi hi ti khemikhali, kambe leyara yo namarhela hi yona ndzhawu yo tsana. Mati ya tsanisa silicone PSA; mati ya munyu ya hatlisisa ku bola. Eka tikhemikhali leti nga ni matimba, swinamarheti swa fluorosilicone kumbe perfluoropolyether – kumbe thepi ya PTFE leyi nga riki na swinamarheti – swa laveka. Ku lahlekeriwa hi matimba ya peel kuya fika eka 40% endzhaku ka 48 wa tiawara ematini.

Thepi ya mahiselo yale henhla ya PTFE yi lava vuhlayiselo lebyi faneleke ku hlayisa ku namarhela ka yona, ku olova, na matirhelo ya ku humesa. Swilaveko swa nkoka swikatsa vulawuri bya mahiselo (10-30°C), ndzhongho wale hansi ka 60%, ku papalata ku vonakala, ku hambanisiwa ka ti khemikhali, ku vekiwa hiku yima, xikan’we naku nghenisiwa ka moya. Landzelela vulawuri bya nhundzu ya FIFO naswona u kambela nkarhi na nkarhi.

Mahiselo ya glass transition (Tg) ya silicone pressure-sensitive adhesive ya kwalomu ka -120°C – yale hansi swinene kutlula ti acrylic adhesives. Tg leyi yale hansi swinene yi hlayisa PTFE high-temperature tape yi olova naswona yi namarhela hambi kuri eka -70°C, leswi sivelaka ku pandzeka ka brittle xikan’we naku endla leswaku kuva na ku namarhela loku tshembekaka eka switirhisiwa swa cryogenic.