PTFE tape reusability ixhomekeke kwizinto ezine: ukwakhiwa kwencamathelisa (high crosslink density, low abicah migration, microphase structure for repositionable tack), substrate anchoring (ukusebenza komphezulu + primer ukuthintela ugqithiso oluncamathelayo olupheleleyo), umva wokwaleka (ukukhulula umaleko ukukhusela incatho ngexesha lokukhulula), kunye nokuphatha ngokufanelekileyo (i-adhesive ecocekileyo yokuncamathela, ukunqanda i-adhesive echanekileyo, i-adhesive echanekileyo). Izinto ezincamathelayo ezihlanjwayo ezihlanjwa ngamanzi zinokuphinda zifumane i>90% tack emva kokucoca.

Ilaphu le-Fiberglass ukucutheka kwe-thermal ngoyena nobangela wokungazinzi kwetape ye-PTFE. Kubushushu be-PTFE sintering (360-400 ° C), uxinzelelo lokulukwa olushiyekileyo luyakhululwa. Ukuba ayinqandwa, ilaphu liyancipha; ukuba unqandekile, uxinzelelo olufihliweyo luvalelwe, lubangela ukuncipha kamva ngexesha lokunyathela (150-200 ° C) kunye nokushisa kokuphela kokusetyenziswa. Isisombululo: sebenzisa i-fiberglass esele ifakwe ngaphambili kunye ne-<0.5% shrinkage kwi-400 ° C, ukuphelisa uxinzelelo olushiyekileyo ngaphambi kokugubungela.

Iteyiphu ye-PTFE yobushushu obubanzi ifuna i-silicone ye-PSA egcina ukunamathela ukusuka ku-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, 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 esivalekileyo), kunye nemingxuma (ukujiya okanye ungcoliseko). Ukucotha kakhulu → ukujiya, imiphetho eshinyeneyo, kunye nokumanzisa kwi-PTFE yamandla asezantsi. Esona sicwangciso sifanelekileyo: ukucotha kokuqala ukuguquguquka komgangatho kunye nokuphunyuka kweqamza, emva koko ukoma okukhawulezileyo ukuze kubunjwe. 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.

I-PTFE i-tape ephezulu yokushisa egcinwe phantsi kweemeko ezichaziweyo (10-25 ° C, 40-70% RH, kude ne-UV / uxinzelelo olunzima) inobomi beshelufu obuqhelekileyo beenyanga ezi-3-6 (amabakala e-premium ukuya kwiinyanga ezili-12). Imilinganiselo ephambili yokuthotywa: amandla e-peel kufuneka angawi phantsi kwe-70% yexabiso lokuqala; akukho ntsalela yokubambelela emva kokususwa kobushushu obuphezulu; akukho carbonization okanye ukuqhekeka kwiqondo lobushushu rated. Iitshekhi ezikhawulezayo: imvakalelo yokukhulula ngesandla, uvavanyo lwentsalela ye-260 ° C, kunye novavanyo lokuncipha kwe-lamination.

I-PTFE tape eqengqelekayo inokuphuhlisa i-interlayer adhesion (i-blocking) kunye nokudluliselwa kwe-adhesive ngexesha lokugcinwa kwexesha elide. Iimbangela: ifilimu ye-PTFE imemori elastiki kunye ne-silicone ye-PSA ikhwela phantsi koxinzelelo / ubushushu. Uthintelo: ukuxinezeleka kokuqina okujikajikayo (okuqinileyo ngaphandle, ukukhululeka kwangaphakathi) ngexesha lokwenziwa kwemveliso, kunye nokukhululwa kwetyabeka kwicala elingancamathiseliyo. Gcina kwi -15 ° C ukuya ku-40 ° C, 30-70% RH, ngokuthe tye kwii-racks, ujikeleze i-rolls ngekota. Kumabanga ancamathelayo ashinyeneyo, yongeza iphepha lokukhulula phakathi kweeleya.

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 xa inamadyungudyungu, ityheli, okanye igugile.