Eli nqaku libandakanya izalathisi zokusebenza 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 (i-120-180 ° C) kudala uthungelwano oluxineneyo olunqamlezileyo 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 kweqondo lokushisa kwakhona kususa i-volatiles ephantsi ye-molecular ngaphambi kokunikezelwa, ukuthintela ukugquma kunye nokungcoliswa kweoli ye-silicone ngexesha lokufudumeza kokuqala.

Esi sikhokelo sigubungela 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 ye-high-temp, 0.18-0.25mm); I-300-400 ° C ye-PEEK, i-LCP, i-PPS kufuphi nabagijimi abashushu (i-adhesive tape iyasilela; sebenzisa i-adhesive-free PTFE ilaphu 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 ezimileyo-ezinovakalelo 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.

Iteyiphu ye-PTFE yombhobho wekhemikhali / isitya sokuchasa umhlwa, ukungagugi, kunye nokhuseleko lokutywina lufuna i-substrate ehambelanayo, inkqubo yokuncamathelisa, kunye nemidiya yekhemikhali. I-Silicone PSA inconywa kwi-200-260 ° C kunye ne-acids / alkalis; I-acrylic PSA ixhathisa izinyibilikisi eziphilayo kodwa inciphisa ubushushu ukuya ku-≤150°C. Kwi-HF, ukubilisa >80% alkali, okanye i-chlorine trifluoride, sebenzisa i-PTFE-kuphela i-lining (ayikho i-organic adhesive). Okubalulekileyo: i-adhesive lelona khonkco libuthathaka, hayi i-PTFE ngokwayo.

I-PTFE tape yokubamba amandla aphuculwe ngokutyabeka kunye nokunyanga inkqubo yokwandisa. Ukwambathisa: umaleko primer (0.5-2μm silane primer kuthintela adhesive peeling), ukuncamathelisa ubukhulu 30-60μm (elona lifanelekileyo ukubamba amandla), vacuum defoaming, kunye 5-10μm filtration. Ukunyanga: ukufudumeza okuhamba ngamanyathelo (80-100 ° C ukususwa kwe-solvent → 120-140 ° C ukubunjwa → 150-220 ° C i-crosslinking enzulu), i-post-curing (40-60 ° C ye-24-48h yokuphumla uxinzelelo), kunye ne-low-tension conveyance ukukhusela uxinzelelo lwangaphakathi kwi-substrate shrinkage. I-primer ibalulekile kumandla asezantsi e-PTFE.

Iteyiphu ye-PTFE yobushushu obuphezulu isebenza njengesixhobo esibalulekileyo kwimveliso ye-semiconductor, hayi injongo esetyenziswayo ngokubanzi. Izicelo eziphambili: ukukhuselwa kwenqanaba le-wafer (i-plasma etching masking, i-CMP yokukhusela ngasemva, i-CVD / PVD masking), iinkqubo zokupakisha (ukulungiswa kwe-wire bonding, imaski ye-soldering ye-PCBs), kunye nokugcinwa kwezixhobo (i-anti-static roller wrapping, ukuphawula indawo yokucoca). Iimfuno ze-Ultra-clean: i-halogens ephantsi (ikhusela i-bond pad corrosion), i-siloxanes ephantsi (<500 ppm, inqanda ukubunjwa kwe-particle ye-insulating), i-ion yensimbi ephantsi (<1 ppm nganye), i-ISO Class 4 yokucoceka kwe-slitting / ukupakisha, i-10⁶ -10⁹ Ω ukukhutshwa kwendawo ye-TV ephantsi.

Iteyiphu yobushushu obuphezulu be-PTFE yonyango idibanisa i-biocompatible substrate ye-PTFE kunye ne-adhesive ye-silicone ephiliswe ngeplatinam. Iimpawu eziphambili: I-ISO 10993 ehambelanayo (ayikho i-cytotoxicity, i-sensitization, okanye irritation), imelana ne-sterilization ephindaphindiweyo (i-steam / EO / gamma), i-260 ° C yokumelana nokushisa. Amanyathelo okhuseleko abalulekileyo: ungadluli kwi-260 ° C (umsi oyityhefu ongaphezu kwe-300 ° C), i-gamma irradiation inokubangela u-embrittlement, uqinisekise iindlela zokuvala inzala, kwaye ucele amaxwebhu okuthobela ngokupheleleyo (iingxelo ze-ISO 10993, i-MSDS, idatha yokuguga). Ayilogazi elithe ngqo okanye ukusetyenziswa kofakelo ngaphandle kokuba kuqinisekiswe ngokuthe ngqo.

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.

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.