Wannan labarin ya ƙunshi mahimman alamomin aiki don tef ɗin PTFE mai zafin jiki da aka yi amfani da shi a cikin suturar iska, jiyya mai zafi da makamantansu. Mahimman buƙatun sun bambanta da yawa daga amfani da yanayi: fitar da gas shine mafi mahimmanci (TML≤1%, CVCM≤0.1%; Aerospace/nauyin gani na buƙatar TML≤0.5%, CVCM≤0.01%); Dole ne a tabbatar da juriya na zafin jiki don duka PTFE substrate (260 ° C) da Layer m; Ana buƙatar PSA na silicone mai ƙarancin gas mai tsafta musamman don hana kamuwa da siloxane; Babban zafin jiki mai riƙe da iko yana hana haɓakawa da haɓakawa; tsabta ba ya buƙatar zubar da fiber da ƙananan abun ciki na ionic; tef anti-static (resistance surface 10⁶-10⁹ Ω/sq) yana hana lalacewar ESD; Dole ne a kimanta juriya na plasma don matakan sputtering / PECVD; thermal shrinkage kasa 2% yana tabbatar da daidaiton abin rufe fuska.

Wannan labarin yana kwatanta yanayin ɗaki da zafin jiki mai girma na mannen matsi na silicone don tef ɗin PTFE. Babban zafin jiki balagagge (120-180 ° C) yana haifar da manyan hanyoyin sadarwa masu haɗin gwiwa tare da ƙarfin haɗin kai mai ƙarfi, yana hana ragowar mannewa bayan kwasfa. Yana samar da haɗin haɗin sinadarai tare da PTFE substrates ta hanyar haɗin gwiwa na farko, yana kawar da haɗarin lalata. Babban zafin jiki balagagge kuma yana kawar da ƙananan ƙananan ƙwayoyin cuta kafin bayarwa, yana hana kumburi da gurɓataccen mai na silicone yayin dumama na farko.

Wannan jagorar ya ƙunshi zaɓin tef ɗin zafin zafin jiki na PTFE don gyaran gyare-gyaren allura da aikace-aikacen rigakafin sanda. Zaɓin tushen zafin jiki: ≤260 ° C don robobi na gabaɗaya (daidaitaccen tef ɗin PSA na silicone, 0.13-0.18mm); 260-300 ° C don robobi na injiniya na zafin jiki kamar PC, PA66, POM (manufin silicone mai zafi, 0.18-0.25mm); 300-400°C don PEEK, LCP, PPS kusa da masu gudu masu zafi (tef ɗin mannewa ya gaza; yi amfani da zane na PTFE mara ɗaure ko fim ɗin PFA). Zaɓin tushen kayan abu: kayan tacky suna buƙatar babban-saki mai tsabta PTFE; Gilashin / kayan da aka cika ma'adinai suna buƙatar nauyin nauyin 0.25mm + tef mai jurewa; abubuwan da ke lalata abubuwa suna buƙatar mannen sinadarai mai juriya da maɗauri mai yawa; aikace-aikace masu ƙarfi suna buƙatar tef ɗin PTFE baƙar fata mai-tsaye.

PTFE-rufi fiberglass zane da aka yadu amfani a roba sarrafa domin ta zafi juriya, da mara sanda dukiya, da kuma low gogayya. Maɓalli na aikace-aikacen sun haɗa da: na'urorin saki don faranti / ɓarna vulcanization da gyare-gyaren taya; bel ɗin jigilar da ba na sanda ba don buɗaɗɗen niƙa, kalanda, da layukan sanyaya; zanen interleave don ajiyar roba da aka kammala; na musamman handling na silicone da fluororubber; da tanda don bayan warkewa. Fa'idodin sun haɗa da kawar da mannewa, rage amfani da wakili na saki, hana abin nadi, da tabbatar da rushewar sassauƙa.

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.

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.