Eli nqaku libandakanya izalathisi zentsebenzo eziphambili ze-PTFE tape yobushushu obuphezulu obusetyenziswa kwi-vacuum coating, unyango lwe-vacuum ubushushu kunye neendawo ezifanayo. Iimfuno eziphambili zihluke kakhulu kusetyenziso lwe-atmospheric: ukuphuma ngaphandle kubaluleke kakhulu (TML≤1%, CVCM≤0.1%; i-aerospace / amabakala okukhanya afuna i-TML≤0.5%, i-CVCM≤0.01%); ukumelana nobushushu kufuneka kuqinisekiswe kuzo zombini i-PTFE substrate (260 ° C) kunye ne-adhesive layer; I-silicone ye-PSA ehlanjululwe ngokukodwa ecocekileyo ephantsi-outgassing iyafuneka ukuthintela ukungcoliseka kwe-siloxane; ubushushu obuphezulu obubambe amandla bunqanda ukukhasa kunye nokuphakanyiswa komphetho; ucoceko alufuni ukuchithwa kwefayibha kunye nomxholo ophantsi we-ionic; i-anti-static tape (i-surface resistivity 10⁶-10⁹ Ω/sq) ikhusela umonakalo we-ESD; Ukuxhathisa kweplasma kufuneka kuhlolwe iinkqubo ze-sputtering / PECVD; i-thermal shrinkage engaphantsi kwe-2% iqinisekisa ukuchaneka kwe-mask.

Eli nqaku lithelekisa ubushushu begumbi kunye nokuvuthwa okuphezulu kwe-silicone ye-adhesive-sensitive adhesive for PTFE tape. Ukuvuthwa kobushushu obuphezulu (120-180 ° C) kudala uthungelwano oluxineneyo oluqhagamshelweyo olunamandla abambeneyo aqinileyo, lukhusela intsalela encamathelayo emva kokuxobuka. Yenza iikhemikhali ze-anchoring bonds kunye ne-PTFE substrates ngokusebenzisa i-primer co-curing, ukuphelisa umngcipheko we-delamination. Ukuvuthwa okuphezulu kobushushu kwakhona kususa i-low-molecular volatiles ngaphambi kokunikezelwa, ukuthintela ukugquma kunye nokungcoliswa kweoli ye-silicone ngexesha lokufudumeza kokuqala.

Esi sikhokelo sibandakanya i-PTFE yokukhetha iteyiphu yobushushu obuphezulu bokubumba isitofu sokubumba kunye nezicelo zokuchasa intonga. Ukukhetha okusekelwe kwiqondo lokushisa: ≤260 ° C kwiiplastiki eziqhelekileyo (i-tape eqhelekileyo ye-silicone ye-PSA, 0.13-0.18mm); I-260-300 ° C kwiiplastiki zobunjineli obuphezulu obuphezulu njenge-PC, i-PA66, i-POM (i-adhesive ye-silicone ephezulu, i-0.18-0.25mm); I-300-400 ° C ye-PEEK, i-LCP, i-PPS kufuphi nabagijimi abashushu (i-adhesive tape iyasilela; sebenzisa ilaphu le-PTFE elingena-adhesive okanye ifilimu ye-PFA). Ukukhetha okusekwe kwizinto eziphathekayo: imathiriyeli ye-tacky ifuna ukukhutshwa okuphezulu okucocekileyo kwe-PTFE imiphezulu; iglasi / izinto zeminerali ezizaliswe zifuna umsebenzi onzima we-0.25mm + i-tape yokunxiba; izongezo ezonakalisayo zifuna ukuncamatheliswa kwekhemikhali kunye nesubstrate eshinyeneyo; izicelo ezingashukumiyo zifuna iteyiphu ye-PTFE echasene nestatic emnyama.

Ilaphu le-fiberglass egqunywe nge-PTFE lisetyenziswa kakhulu ekusetyenzweni kwerabha yokumelana nobushushu, ipropathi engabambekiyo, kunye nokukhuhlana okuphantsi. Izicelo eziphambili zibandakanya: ukukhutshwa kwee-liners ze-plate / vacuum vulcanization kunye nokubumba isondo; amabhanti okuhambisa angengabotshelelwa kwizingqusho ezivulekileyo, iikhalenda, kunye nemigca yokupholisa; ilaphu le-interleave yokugcina irabha egqityiweyo; ukuphathwa okukhethekileyo kwe-silicone kunye ne-fluororubber; kunye neetreyi ze-oveni zokulungisa emva kokunyanga. Izibonelelo zibandakanya ukuphelisa ukunamathela kokungunda, ukunciphisa ukusetyenziswa kwe-ejenti yokukhulula, ukuthintela ukusonga kwe-roller, kunye nokuqinisekisa ukubunjwa okugudileyo.

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 yobushushu obuphezulu eguquguqukayo kwaye inamathele nakwi-70 ° C, ikhusela ukuqhekeka kwe-brittle kunye nokwenza ukuba ukunamathela okuthembekileyo kwizicelo ze-cryogenic.

Ukukhethwa kwephepha lokukhulula okanye i-substrate yefilimu kunye ne-arhente yokukhulula ichaphazela ngokuthe ngqo ukugcinwa kozinzo kunye nokusebenza kwe-peeling ye-PTFE ye-tape ephezulu yokushisa. Eli nqaku lithelekisa i-PET kunye ne-kraft paper substrates kunye ne-silicone vs.