PTFE yubushyuhe bwo hejuru ifite imbaraga zo kurwanya umunyu mwinshi, ariko ingingo zintege nke nigice gifatika hamwe na fibre yububiko. Uburyo bwo gusuzuma: 1000h yumunyu utagira aho ubogamiye (NSS), gupima imbaraga zo kugumana imbaraga (≥80% bisabwa), inenge zigaragara (guterura, kubyimba), hamwe no kwangirika kwicyuma. Kubidukikije byo mu nyanja n’umunyu mwinshi: koresha silicone PSA (ntabwo ari acrylic), insimburangingo ya PTFE yuzuye, impande zombi zifunga kashe idashobora guhangana nikirere, hanyuma ushyire primer hejuru yicyuma.

Silicone yumuvuduko ukabije (PSA) kuri kaseti ya PTFE yubushyuhe bwo hejuru iratandukanye cyane mubikorwa byo gusaza cyane. Methylphenyl silicone PSA igumana> 85% imbaraga zishishwa nyuma yiminsi 250 ° C / 7, mugihe ubwoko bwa methyl busanzwe bugabanuka kugera kuri 50-70%. Sisitemu yongeyeho (hydrosilylation) itanga ihame ryiza kuruta peroxide-yakize. Kumurimo uhoraho 200 ° C +, hitamo inyongera-yakize-amanota menshi.

Amashanyarazi ya PTFE yerekana ubushyuhe (PSA) kaseti igomba gukora ubushyuhe mugihe ikomeje. Ongeraho ibyuzuza bitezimbere ubushyuhe bwumuriro ariko bikomeretsa gufatira. Impirimbanyi nziza ikoresha uduce duto duto (nka skeleton yuyobora) ivanze nuduce twiza (kugirango twuzuze icyuho), igumane ibyuzuye byuzuye hejuru yurwego rwa percolation. Irinde flake na fibre; Bica tack.

PTFE yubushyuhe bwo hejuru ikorera inganda za PV mubikorwa bibiri bitandukanye: inzira ikoreshwa (irinda EVA kurengerwa na laminator, mask yo kugurisha) hamwe no kuramba kuramba (gupfunyika busbar, guhuza agasanduku). Kugirango ukoreshe imbere imbere, kaseti igomba kunyura IEC 61215: 1000-2000h ubushyuhe butose, UV, gusiganwa ku magare (-40 ° C kugeza + 85 ° C), hamwe na silicone PSA no kugabanuka <1%.

PTFE yubushyuhe bwo hejuru ikoreshwa kumyuma ifunga ubushyuhe hamwe nudupapuro twa kashe itanga indangagaciro enye zingenzi: irinda ifumbire ya pulasitike yashonze (ikuraho igihe cyo hasi), irinda kashe ihenze ipfa, ihuza ubushyuhe / umuvuduko wa kashe ihoraho, kandi igabanya ubukana bwa firime. Birasabwa gufata kaseti ya fibre (0.13-0.25 mm) hamwe na silicone PSA (≥260 ° C). Anti-static umukara kaseti kumirongo yihuta.

Inzitizi y'amazi ya barrière ya PTFE ifata kaseti igenwa cyane cyane nubusembwa (micropores, microcrack, fibre fibre) aho kuba hydrophobicity ya PTFE. Filime nziza ya PTFE itanga gusa WVTR yo hagati. Ibice byinshi byuzuzanya hamwe na lamellar yuzuza (mika, ibirahuri by'ibirahure) bitera labyrint, bigabanya cyane kwanduza imyuka. Kugirango ushireho ubuhehere bwinshi, vuga neza.

Kurwanya creep ya PTFE yubushyuhe bwo hejuru yubushyuhe munsi yumutwaro muremure uhoraho (cyane cyane kuri 200-260 ° C) bigenwa nimpamvu ebyiri: silicone PSA ihuza ubwinshi (guhuza kwinshi birinda gutemba) hamwe nubwoko bwa substrate (fiberglass-yongerewe imbaraga PTFE irwanya ubukonje bukonje; Ibifunga bidafunze birananirana vuba mubushyuhe bwinshi. Gufata neza cyane byongera ibyago byo kunyerera.

Kuri kaseti ya PTFE yubushyuhe bwo hejuru yibiza igihe kirekire, substrate ya PTFE ikomeza kuba inert ya chimique, ariko igipande gifatika nikintu kidakomeye. Amazi agabanya silicone PSA; amazi yumunyu yihutisha ruswa. Ku miti ikaze, fluorosilicone cyangwa perfluoropolyether yifata - cyangwa kaseti ya PTFE idafite imiti - irakenewe. Gutakaza imbaraga zigera kuri 40% nyuma yamasaha 48 mumazi.

PTFE yubushyuhe bwo hejuru isaba ububiko bukwiye kugirango ikomeze, ihindagurika, kandi irekure imikorere. Ibisabwa byingenzi birimo kugenzura ubushyuhe (10-30 ° C), ubuhehere buri munsi ya 60%, kwirinda urumuri, kwigunga imiti, gushyira vertical, no guhumeka. Kurikiza imicungire ya FIFO kandi ugenzure buri gihe.

Ubushyuhe bwikirahure (Tg) bwa silicone yumuvuduko ukabije ni -120 ° C - munsi cyane ugereranije na acrylic. Iyi ultra-low Tg ituma PTFE yubushyuhe bwo hejuru ya kaseti ihindagurika kandi ikomera ndetse no kuri -70 ° C, ikarinda gucika intege kandi igafasha kwizerwa mubikorwa bya cryogenic.