Ubushushu obubanzi boluhlu lwe-PTFE tape ifuna i-silicone ye-PSA egcina ukunamathela ukusuka kwi-70°C ukuya kuma-260°C. Izinto eziphambili zoyilo: i-primer-anchored transition layer (ikhusela i-delamination), i-microstructure yesiqithi-selwandle (i-MQ resin islands + i-polysiloxane isigaba esiqhubekayo), i-gradient crosslinking (i-high-density layer yangaphakathi yokuxhathisa i-creep, i-low-density yangaphandle ye-low-temp tack), kunye ne-heat-stabilized fillers (i-oxid oxide). I-Phenyl-modified siloxane segments cinezela i-low-temperature crystallization, eyenza ukuguquguquka ngaphantsi kwe -100 °C.

Isiphelo esisikiweyo isakhiwo sobuso be-PTFE iteyiphu yobushushu obuphezulu buchaphazela ngokuthe ngqo ukuncamathela okuncamathelayo kunye nokuphakanyiswa komphetho ngexesha lesicelo. Ukucandwa okulambathayo (iincakuba ezibuthuntu, i-engile engafanelekanga) kudala imicu yeglu, ibhitya umaleko wokuncamathelisa emphethweni, kwaye iveze iifiberglass burrs - ezikhokelela ekujuxuzeni, ekudibaneni okubuthathaka, kunye nokuphakamisa phantsi kobushushu okanye ukuxinana. Ubuso besiphelo esingaqhelekanga (i-wavy, i-protruding) ibangela ukusabalalisa koxinzelelo olungalinganiyo, ukuqhuba i-adhesive creep ngexesha lokugcina. Ubuso besiphelo obufanelekileyo bugudileyo, bugungxulwe, kwaye akukho monakalo-usebenza njengetywina elivala i-adhesive kwaye iqinisekisa ukubopha okugcweleyo.

Ngexesha PTFE tape ukutyabeka, izinga volatilization ukunyibilika of abicah ngoxinzelelo-sensitive adhesive yinkqubo ebalulekileyo parameter. Ukukhawuleza kakhulu → ukusulwa komphezulu, ukungaphakami kakuhle, imingxunya (isinyibilikisi esivalelekileyo), kunye nemingxuma (ukujiya okanye ungcoliseko). Ukucotha kakhulu → ukujiya, imiphetho eshinyeneyo, kunye nokumanzisa kwi-PTFE yamandla asezantsi. Elona qhinga lifanelekileyo: ukucotha kokuqala ukuguquguquka komgangatho kunye nokuphunyuka kweqamza, emva koko ukoma okukhawulezileyo ukubunjwa. Sebenzisa izinyibilikisi ezixubeneyo (i-toluene/ixylene + ukomisa ngokukhawuleza) kunye nobushushu be-oven yegradient (ephantsi →phakathi → phezulu).

I-PTFE i-tape yobushushu obuphezulu ilahlekelwa ukubambelela emva kokusetyenziswa ngokuphindaphindiweyo ngenxa yokungcoliswa komhlaba (uthuli, ioli ye-silicone), ukungaphumeleli kwe-adhesive cohesive (intsalela), okanye i-substrate bonding ebuthathaka. Izisombululo: i-silicone ye-high-crosslink ye-PSA (ukufuduka okuphantsi, ukulinganisa ukulinganisa / ukubamba amandla), unyango lwe-primer kwi-substrate ye-PTFE, i-dense fiberglass backing, kunye nokuphathwa ngokufanelekileyo (indawo ecocekileyo, i-peel epholileyo, i-angle ye-180 °). Uvavanyo lobungakanani luqinisekisa ukuphuculwa.

Iiteyiphu ze-PTFE zobushushu obuphezulu obugcinwe kwifom yomqulu zinokubandezeleka ngenxa ye-interlayer adhesion (ukuthintela) kunye nokudluliselwa kwe-adhesive ukuya kwicala elinganamatheli. Iingcambu ezibangela: ifilimu ye-PTFE imemori elastiki kunye ne-silicone ye-PSA ikhwela phantsi koxinzelelo kunye nobushushu. Isisombululo: I-gradient winding tension - iqinile kumaleya angaphandle, ikhululekile kumaleko angaphakathi - usebenzisa ulawulo lokuxinezeleka oluvaliweyo. Gcwalisa isambatho sokukhululwa, ukugcinwa okufanelekileyo (15-40 ° C, 30-70% RH), ukubekwa okuthe tye, kunye nokujikeleza kwekota.

Iteyiphu yobushushu obuphezulu be-PTFE esetyenziswa kuqhagamshelwano lokutya kufuneka ihloniphe imida yobushushu obungqongqo: ≤260°C ukusetyenziswa rhoqo (akukho mda wexesha), 260-300 °C ukuya kuthi ga kwimizuzu engama-30 kuphela, kwaye> 300 °C akuvumelekanga. Iteyiphu yeyokufowunelwa ngokungathanga ngqo kuphela (i-tray liners, i-heat sealer covers), hayi ukusonga ukutya ngokuthe ngqo. Ungaze usebenze ngaphandle komthwalo wokutya (ukufudumeza okomileyo). Faka enye indawo ukuba inamadyungudyungu, ityheli, okanye igugile.

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 luhla kwi-50-70%. Iinkqubo ezongeziweyo (i-hydrosilylation) zinika uzinzo olungcono kakhulu kune-peroxide-nyango. Ngenkonzo eqhubekayo ye-200 ° C+, khetha amabanga aphezulu-phenyl anephenyl.

Iiteyiphu ze-PTFE zokuncamathelisa ngoxinzelelo lwe-thermal-sensitive (PSA) kufuneka ziqhube ubushushu ngelixa zihlala zincangathi. Ukongeza izihluzi ziphucula i-thermal conductivity kodwa kulimaza ukunamathela. Ibhalansi efanelekileyo isebenzisa i-spherical coarse particles (njenge-conductive skeleton) edityaniswe ngamasuntswana amahle (ukugcwalisa i-voids), ukugcina ukulayishwa okupheleleyo kwe-filler nje ngaphezu kwe-percolation threshold. Gwema iiflakes kunye nemicu; babulala intambo.

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 ngokusisigxina kwangaphakathi, iiteyipu kufuneka zidlule i-IEC 61215: 1000-2000h ukushisa okumanzi, i-UV, ibhayisikili ye-thermal (-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.