Iteyiphu yobushushu obuphezulu be-PTFE inokumelana nokutshiza kwetyuwa ebalaseleyo, kodwa iindawo ezibuthathaka ngumaleko wokuncamathelisa kunye nemiphetho ye-fiberglass substrate. Iindlela zokuvavanya: Uvavanyo lwe-1000h olungathathi hlangothi lwetyuwa yokutshiza (NSS), ukulinganisa ukugcinwa kwamandla e-peel (≥80% efunekayo), iziphene ezibonakalayo (ukuphakamisa, ukugqabhuka), kunye ne-metal substrate corrosion. Kwiindawo zaselwandle kunye netyuwa ephezulu-yenkungu: sebenzisa i-silicone ye-PSA (hayi i-acrylic), i-substrate ye-PTFE efakwe ngokupheleleyo, itywina imiphetho nge-sealant ekwazi ukumelana nemozulu, kwaye usebenzise i-primer kwiindawo zentsimbi.

I-Silicone i-adhesives-sensitive adhesives (PSA) ye-PTFE iiteyiphu zobushushu obuphezulu ziyahluka ngokubanzi ekusebenzeni kokuguga okuphezulu. I-Methylphenyl silicone PSA igcina> i-85% yamandla e-peel emva kwe-250 ° C / iintsuku ze-7, ngelixa uhlobo oluqhelekileyo lwe-methyl luwela kwi-50-70%. Iinkqubo ezongezelelweyo-ezinyangwayo (i-hydrosilylation) zinika uzinzo olungcono kakhulu kune-peroxide-nyango. Ngenkonzo eqhubekayo ye-200 ° C+, khetha amabanga aphezulu-phenyl anyangayo.

~!phoenix_var119!~

I-PTFE iteyiphu yobushushu obuphezulu busebenza kwishishini le-PV kwiindima ezimbini ezihlukeneyo: inkqubo esetyenziswayo (ithintela ukunamathela kokuphuphuma kwe-EVA kwi-laminators, imaski ye-solder) kunye nokufakwa kwexesha elide (ukusonga kwebhasi, ukulungiswa kwebhokisi ye-junction). Ukusetyenziswa kwangaphakathi ngokusisigxina, ii-tapes kufuneka zidlule i-IEC 61215: 1000-2000h ukushisa okumanzi, i-UV, i-thermal cycling (-40 ° C ukuya + 85 ° C), kunye ne-silicone PSA kunye ne-shrinkage <1%.

Iteyiphu yobushushu obuphezulu be-PTFE esetyenziswa kwiimela zokutywinwa kobushushu kunye nemicu yokutywina ihambisa amaxabiso angundoqo amane: inqanda ukuncamathelwa kweplastiki enyibilikayo (iphelisa ixesha lokuphumla), ikhusela ukutywinwa okuxabisa kakhulu kuyafa, ihomogenizes ubushushu/uxinzelelo lwamatywina angaguqukiyo, kwaye inciphisa ukukhuhlana kwefilimu. I-fiberglass-backed tape (0.13-0.25 mm) kunye ne-silicone PSA (≥260 ° C) iyanconywa. I-tape emnyama ye-anti-static kwimigca yesantya esiphezulu.

Ipropathi yothintelo lomphunga wamanzi we-PTFE iteyiphu encamathelayo imiselwa ikakhulu ziziphene zokwaleka (micropores, microcracks, fibre wicking) kune-PTFE's intrinsic hydrophobicity. Ifilimu ye-PTFE ecocekileyo ibonelela nge-WVTR ephakathi kuphela. I-multi-layer coating kunye ne-lamellar fillers (i-mica, i-glass flakes) yenza umphumo we-labyrinth, ukunciphisa kakhulu ukuhanjiswa komphunga. Ukutywinwa komswakama ophezulu, khankanya iingubo ezixinzelelekileyo.

Ukumelana ne-Creep ye-PTFE i-tape yokubambelela yobushushu obuphezulu phantsi komthwalo oqhubekayo wexesha elide (ingakumbi kwi-200-260 ° C) imiselwe zizinto ezimbini: i-silicone ye-PSA ye-crosslink density (i-higher crosslinking inqanda ukuhamba) kunye nohlobo lwe-substrate (i-fiberglass-eqiniswe i-PTFE ixhathisa ukukhwela okubandayo; ifilimu ye-PTFE ecocekileyo iyahamba). I-adhesive engaxutywanga ihluleka ngokukhawuleza ekushiseni okuphezulu. Iileya ezincamathelayo ezityebileyo zonyusa umngcipheko wokukreqa.

Kwiiteyiphu ze-PTFE zobushushu obuphezulu phantsi kokucwiliswa kwexesha elide, i-PTFE substrate ihlala inert yekhemikhali, kodwa i-adhesive layer iyindawo ebuthathaka. Amanzi buthathaka abicah PSA; Amanzi anetyuwa anyusa isantya umhlwa. Kwiikhemikhali ezinobundlobongela, i-fluorosilicone okanye i-perfluoropolyether adhesives - okanye iteyiphu ye-PTFE engena-adhesive-iyadingeka. I-peel ilahleko yamandla ukuya kwi-40% emva kweeyure ezingama-48 emanzini.

Iteyiphu ye-PTFE yobushushu obuphezulu ifuna ukugcinwa okufanelekileyo ukugcina ukunamathela kwayo, ukuguquguquka, kunye nokukhulula ukusebenza. Iimfuno eziphambili zibandakanya ukulawulwa kweqondo lokushisa (10-30 ° C), umswakama ongaphantsi kwe-60%, ukuphepha ukukhanya, ukuhlukaniswa kweekhemikhali, ukubekwa ngokuthe nkqo, kunye nomoya. Landela ulawulo lwe-inventri ye-FIFO kwaye uhlole rhoqo.

Ubushushu beglasi yokutshintsha (Tg) ye-silicone yokuncamathelisa i-adhesive yoxinzelelo ijikeleze -120 ° C - isezantsi kakhulu kune-adhesives ye-acrylic. Le Tg ye-ultra-low igcina i-PTFE i-tape ephezulu yobushushu eguquguqukayo kwaye inamathele nakwi--70 ° C, ikhusela ukuqhekeka kwe-brittle kunye nokuvumela ukubambelela okuthembekileyo kwizicelo ze-cryogenic.