Tef ɗin PTFE don bututun sinadari / jigila anti-lalata, mara sanda, da kariyar rufewa yana buƙatar madaidaicin ma'auni, tsarin mannewa, da kafofin watsa labarai na sinadarai. Silicone PSA ana bada shawarar don 200-260 ° C tare da acid / alkalis; acrylic PSA yana tsayayya da kaushi na halitta amma yana iyakance zafin jiki zuwa ≤150°C. Don HF, tafasa> 80% alkali, ko chlorine trifluoride, yi amfani da rufin PTFE-kawai (babu mannen kwayoyin halitta). Mahimmanci: m shine hanyar haɗi mafi rauni, ba PTFE kanta ba.

PTFE tef rike ikon da aka inganta via shafi da kuma curing tsari ingantawa. Rufe: Layer na farko (0.5-2μm silane primer yana hana kwasfa mai ɗaure), kauri mai maɗaukaki 30-60μm (mafi dacewa don riƙe da iko), ɓarna ɓarna, da tacewa 5-10μm. Curing: stepwise dumama (80-100 ° C sauran ƙarfi cire → 120-140 ° C siffata → 150-220 ° C zurfin crosslinking), post-curing (40-60 ° C for 24-48h don shakata danniya), da kuma low-tashin isarwa don hana ciki danniya daga substrate shrinkage. Fim ɗin yana da mahimmanci don ƙarancin ƙarfin saman PTFE.

Tef mai zafin jiki na PTFE yana aiki azaman abu mai mahimmanci a masana'antar semiconductor, ba kayan amfani na gaba ɗaya ba. Maɓallin aikace-aikacen: Kariyar matakin matakin wafer (masking plasma etching masking, CMP backside kariya, CVD/PVD masking), aiwatar da marufi (daidaitawar haɗin waya, abin rufe fuska don PCBs), da kiyaye kayan aiki (nadi-tsaye na nadi, alamar tsabtatawa). Ultra-tsabta bukatun: low halogens (hana bond kushin lalata), low siloxanes (<500 ppm, hana insulating barbashi samuwar), low karfe ions (<1 ppm kowane), ISO Class 4 cleanroom slitting / marufi, 10⁶-10⁹ Ω surface resistivity, da kuma low TVOC watsi.

Babban tef ɗin PTFE mai zafin jiki na likitanci yana haɗa nau'in PTFE mai dacewa tare da mannen silicone da aka warkar da platinum. Babban fasali: TS EN ISO 10993 mai yarda (babu cytotoxicity, hankali, ko haushi), yana jure maimaita haifuwa (turi / EO / gamma), juriya na zafi 260 ° C. Mahimman taka tsantsan: kar a wuce 260°C ( hayaki mai guba sama da 300°C), iskar gamma na iya haifar da ɓarna, inganta hanyoyin haifuwa, da buƙatar cikakkun takaddun yarda (rahotanni na ISO 10993, MSDS, bayanan tsufa). Ba don amfani da jini kai tsaye ko dasawa ba sai in an inganta shi ta musamman.

PTFE tef reusability ya dogara da dalilai hudu: m tsari (high crosslink yawa, low silicone hijirarsa, microphase tsarin for repositionable tack), substrate anchoring (surface kunnawa + firamare don hana cikakken m canja wurin), backside shafi (saki Layer don kare m a lokacin unwinding), da kuma dacewa handling (tsaftace-tsaftacewa m surface). Abubuwan adhesives da za a iya wanke ruwa na iya murmurewa> 90% tack bayan tsaftacewa.

Ƙunƙashin zafin jiki na fiberglass shine babban dalilin rashin kwanciyar hankali na tef na PTFE. A PTFE sintering yanayin zafi (360-400 ° C), saura danniya saƙa da aka saki. Idan ba a tsare ba, masana'anta suna raguwa; idan an kame, damuwa na ɓoye yana kulle a ciki, yana haifar da raguwa daga baya yayin maganin manne (150-200°C) da dumama amfani ta ƙarshe. Magani: yi amfani da fiberglass da aka saita pre-zafi tare da <0.5% raguwa a 400 ° C, kawar da ragowar damuwa kafin sutura.

Tef ɗin PTFE mai faɗin zafin jiki yana buƙatar PSA silicone wanda ke kiyaye mannewa daga -70°C zuwa 260°C. Maɓallin ƙira mai mahimmanci: Layer na tsaka-tsakin tsaka-tsaki (hana delamination), microstructure na tsibirin teku (MQ resin tsibiran + polysiloxane ci gaba da lokaci), gradient crosslinking (high-density Layer Layer for creep juriya, low-density m Layer for low-temp tack), da zafi-stabilized fillers (cerium oxide for oxide for oxide). ɓangarorin siloxane da aka gyaggyara Phenyl suna hana ƙarancin zafin jiki, yana ba da damar sassauci a ƙasa -100°C.

Tsarin fuskar ƙarshen yanke na tef ɗin zafin zafin jiki na PTFE kai tsaye yana shafar manne da ɗagawa a lokacin aikace-aikacen. Rarrashin tsagawa (rauni mara kyau, kusurwa mara kyau) yana haifar da filaments na manne, yana ɓatar da gefen gefen gefe, kuma yana fallasa burbushin fiberglass - yana haifar da zub da jini, haɗin gwiwa mai rauni, da ɗagawa ƙarƙashin zafi ko tashin hankali. Fuskokin ƙarshen da ba bisa ka'ida ba (wavy, protruding) suna haifar da rarrabawar matsatsi mara daidaituwa, tuƙi mai raɗaɗi yayin ajiya. Maƙasudin ƙarshen fuska yana da santsi, ƙwanƙwasa, kuma ba tare da lalacewa ba - yana aiki azaman hatimi wanda ke kulle manne kuma yana tabbatar da cikakken haɗin kai.

A lokacin PTFE tef shafi, da sauran ƙarfi volatilization kudi na silicone matsa lamba-m m ne m tsari siga. Sauri da yawa → Fatar jiki, rashin daidaituwa, raƙuman raƙuman ruwa (maganin tarko), da raƙuman ruwa (magudanar ruwa ko gurɓatawa). Jinkirin → sagging, kauri gefuna, da dewetting a kan ƙananan-makamashi PTFE. Kyakkyawan dabara: jinkirin jujjuyawar farko don daidaitawa da kumfa kumfa, sannan hanzarta bushewa don siffata. Yi amfani da gauraye masu kaushi (toluene/xylene + bushewa da sauri) da zafin jiki na gradient (ƙananan → matsakaici → high).

Tef mai zafin jiki na PTFE yana asarar mannewa bayan amfani da shi akai-akai saboda gurɓatar ƙasa (ƙura, man silicone), gazawar haɗin gwiwa (raguwa), ko haɗin haɗin ƙasa mai rauni. Magani: high-crosslink silicone PSA (ƙananan ƙaura, daidaitaccen matsewa / ikon riƙewa), jiyya na farko a kan madaidaicin PTFE, goyan bayan fiberglass mai yawa, da kulawa mai kyau (tsaftace saman, kwasfa mai sanyi, kusurwar 180°). Gwajin ƙididdiga yana tabbatar da haɓakawa.