Wannan labarin ya ƙunshi aikace-aikace na Teflon high-zazzabi zane (PTFE-rufi fiberglass masana'anta) a cikin sararin samaniya filin. Maɓallin aikace-aikacen yanki: masana'antar kayan haɗin gwiwa - sakin zane / fim a cikin gyare-gyaren autoclave, keɓewa yadudduka, bel mai ɗaukar zafi mai zafi don samar da prepreg; Injin da kariyar zafin jiki mai zafi - barguna masu rufewa na thermal, bangon bangon wuta, haɗin haɗin zafi mai sassauƙa; Rufin wutar lantarki da kariyar kayan aikin waya - nade na USB a cikin ɗakunan injin da wuraren saukar da kaya; Abubuwan ciki na jirgin sama da kariya ta wuta - labulen wuta / shingen hayaki da ke saduwa da ka'idodin FST, thermal / aoustic insulation bargo; Aikace-aikacen sararin samaniya da sararin samaniya - majalisu masu dumbin yawa (MLI), layukan lubrication na anti-sanyi-weld don hanyoyin jigilar hasken rana da hinges na eriya, zane mai sarrafa zafi.

Wannan labarin ya bayyana yadda PTFE shafi shaidu zuwa fiberglass masana'anta substrate a Teflon high-zazzabi zane. Haɗin sinadarai kai tsaye ba zai yiwu ba saboda PTFE's ultra-low surface energy. Ana samun haɗin kai ta hanyar: Haɗin kai na injiniya (haɗin kai na jiki) - PTFE emulsion yana shiga raƙuman fiber kuma yana riƙe da daure fiber bayan sintering; Silane hadawa wakili pretreatment - Forms kwayoyin gada tsakanin inorganic gilashin zaruruwa da Organic primer; Layer canji na kemikal - ta amfani da PAI, PPS, PES ko PEEK resins tare da micropowder PTFE, ana amfani da shi bayan haɗin haɗin gwiwa don ƙirƙirar madaurin canji mai ƙarfi; Hot-narke m fim lamination - FEP ko PFA fina-finan (narkewar batu 260-310 ° C) bond pre-kafa PTFE fina-finan zuwa masana'anta; Tsarin gradient ta hanyar haɓakawa da yawa da hawan hawan igiyar ruwa - tsarma izinin farko tare da wakili mai ɗaure / haɗawa yana shiga zurfi cikin zaruruwa, biye da ƙarancin PTFE mai tsabta, ƙirƙirar gradient daga fiberglass zuwa PTFE mai tsabta.

Wannan labarin yana magana ne akan yadda ƙirar ƙirar ƙirar ƙirar Teflon mai zafi (PTFE) mai zafi mai zafi yana daidaita yanayin iska tare da rufi da kaddarorin da ba na sanda ba. Rikici mai mahimmanci: iyawar iska yana buƙatar buɗaɗɗen pores, yayin da rufi yana buƙatar yawa kuma rashin sanda yana buƙatar filaye masu santsi. Madaidaitan dabarun ƙira: sarrafa matsakaicin diamita na pore (0.1-2μm, daidaitaccen <0.5μm) don hana narkewar shiga da kuma kula da ƙarancin wutar lantarki; sarrafa porosity a 50-70% (≈60% mafi kyau duka) cimma Gurley 20-100s / 100cc da ƙarfin dielectric ≥2kV don fim ɗin 0.13mm; Ɗauki tsarin pore na cibiyar sadarwar 3D mai girma-tortuosity (τ≈2.5-4) don murkushe tashoshi masu fitarwa kai tsaye; gina asymmetric gradient pore tsarin tare da m surface fata Layer (1-5μm) ga maras sanda / rufi da porous ciki don breathability; shafa super-oleophobic/hydrophobic saman bayan jiyya ba tare da toshewar pore ba.

Wannan labarin yana gabatar da fa'idodin PTFE high-zazzabi zane a matsayin babban zafin jiki tace kafofin watsa labarai. Ƙarfin maɓalli shida: Fitaccen juriya na zafin jiki (ci gaba da 260 ° C, kololuwa ~ 300 ° C), wuce PPS (190 ° C) da aramid (200 ° C); Matsanancin rashin ƙarfi na sinadarai a kan acid, alkalis, kaushi da oxidants, hydrolysis-resistant, outperforming aramid da P84 a cikin lalata flue gas; Mafi kyawun aikin tsaftace ƙura tare da ƙarancin ƙarancin ƙarfi na saman ƙasa wanda ke ba da damar kawar da kek ɗin ƙura mai sauƙi da ci gaba da raguwar matsa lamba; Kyakkyawan ingancin tacewa tare da girman pore 0.1-3μm yana ɗaukar sama da 99.99% na abubuwan PM2.5; Rashin ƙonewa tare da LOI sama da 95%, tare da zaɓuɓɓukan anti-a tsaye akwai; Babban ƙarfin injiniya daga ƙarfafa fiberglass, tare da tsararren PTFE fiber kafofin watsa labarai yana ba da sassauci da> 4 shekara sabis rayuwa. Kwatanta da kyau da PPS, aramid, Nomex, P84 da fiberglass tace kafofin watsa labarai a cikin zafin jiki, juriya na sinadarai, juriya na hydrolysis da aikin tsaftacewa.

Wannan labarin yana ba da mafita na tsari don hana ragowar mannewa da zubar da jini lokacin amfani da tef mai zafi mai zafi na PTFE don kare yatsun gwal na PCB yayin taron SMT. Tushen bincike na tushen: ragowar yana faruwa daga gazawar haɗin gwiwa ko canja wuri na fuska; zubar jini yana fitowa daga digon danko da mannewa ambaliya karkashin zafi mai sake kwarara. Maganin mahimmanci shine zaɓin tef ɗin da ya dace: silicone PSA tare da ɗan gajeren lokaci ganiya ≥300 ° C, ci gaba da ≥260 ° C, jimlar kauri 0.08-0.13mm tare da bakin ciki high-cohesion m yadudduka, da anti-jini / saura-free takardar shaida. Gudanar da matakai shida: tsaftacewa na farko tare da IPA; lamination na sifili tare da cikakken fitar da iska; ingantaccen bayanin yanayin sake kwarara tare da dumama mai laushi (<2°C/s); bawon sanyi a ƙasa 50 ° C a kusurwar 180 °; aiki nan da nan a cikin sa'o'i 24 da amfani guda ɗaya kawai; sarrafa gazawar tare da gogewar IPA da duban girman girman 40-50x. Don PCBs masu gefe biyu, maye gurbin da sabon tef kafin sarrafa gefe na biyu.

Wannan labarin yana ba da jagorar tsari akan hana wrinkles akan zane mai zafin jiki na PTFE yayin sintering. Wrinkles suna haifar da asali ta hanyar raguwar yanayin zafi mara daidaituwa da rashin daidaituwa. Magani yana rufe cikakken aikin aiki: sarrafa kayan albarkatun ƙasa (cikakken dewaxing / saitin zafi don kawar da damuwa na ciki); impregnation da bushewa (mafi yawa na bakin ciki coatings, m zafin jiki gradient, m drive rollers); sintering tanderu iko (1-3% overfeed don thermal shrinkage izni, rufaffiyar-madauki micro-tension iko, transverse zafin jiki uniformity tsakanin ± 5 ° C, gradient preheating-sintering-sanyi kwana, iska-flotation tanderu a matsayin mafi kyau duka bayani, lankwasa yada rollers); sanyaya da saitin (hannun hankali sannu a hankali, kula da yadawa har zuwa kasa da 100 ° C, cikakken sanyaya kafin iska); saka idanu akan layi tare da duban haske mai ƙarfi da sikanin infrared.

Wannan labarin yana nazarin yadda yashi ko matt gama jiyya ke shafar tsarin saman PTFE babban zane mai zafin jiki. Canje-canje na faruwa a cikin girma uku: Ƙwararren ilimin halittar ɗan adam yana canzawa daga santsin madubi-kamar zuwa ruɓaɓɓen rubutun gully tare da haɓaka ƙimar Ra/Rz sosai, ƙirƙirar ƙirar injina na 3D don haɗin kai na gaba. Mutuncin rufa yana fuskantar haɗari: PTFE Layer thinning, yuwuwar fallasa na fiberglass substrate (wanda ke haifar da asarar kadarorin da ba na sanda ba, shigar danshi, da rage ƙarfin injina), da microcracks da tarkace.

Wannan labarin ya gabatar da cikakken asali tsari don impregnating fiberglass masana'anta da PTFE emulsion. Matakai bakwai masu mahimmanci: ① Pretreatment (dewaxing / dewaxing) a 350-400 ° C don cire ma'aunin ma'auni; ② Tsarin emulsion tare da 40-55% m abun ciki da surfactants don inganta wetting; ③ Ciwon ciki ta hanyar tsoma-matsi ko murfin ruwa na likita; ④ Drying a 100-150 ° C don cire ruwa a hankali kuma ya samar da fim din PTFE bushe; ⑤ Sintering a 360-390 ° C (har zuwa 400 ° C) don narke sassan PTFE a cikin fim mai ci gaba; ⑥ Multi-cycle impregnation-bushewa-sintering maimaita sau 2-4 don isa manufa kauri da guduro abun ciki (45-65%); ⑦ Bayan jiyya ciki har da maganin korona, gyaran fuska, iska da dubawa mai inganci. Mahimman abubuwan sarrafawa: cikakken dewaxing, cikakken emulsion wetting, bushewa a hankali, madaidaicin zafin jiki, da daidaiton sutura. Kayayyakin suna hidimar laminati masu ɗaure da tagulla, bel masu zafi mai zafi da kayan membrane na gine-gine.

Wannan labarin ya ƙunshi mahimmin alamomin aiki don tef ɗin PTFE mai zafi da aka yi amfani da shi a cikin suturar iska, jiyya mai zafi da makamantansu. Mabuɗin buƙatun sun bambanta da yawa daga amfani da yanayi: fitar da iskar 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 gabatar da kaushi na halitta wanda PTFE babban zafin jiki na zane zai iya jurewa. PTFE-rubutun fiberglass masana'anta yana baje kolin inertness na musamman na sinadarai, yana tsayayya da kusan duk abubuwan kaushi na yau da kullun a ƙarƙashin yanayin aiki na yau da kullun ba tare da narke, kumburi ko halayen sinadaran ba. Abubuwan da za a iya jurewa sun haɗa da: alcohols (methanol, ethanol, isopropanol), ketones (acetone, MEK, cyclohexanone), esters (ethyl acetate, butyl acetate), hydrocarbons (man fetur, toluene, xylene, hexane), halogenated hydrocarbons (dichloromethane, chloroformin), Organic acid tetras (chloroformin), carbon ethers acid tetras, chloroform, carbon ethers ethers. (glacial acetic acid, formic acid), amines da amides (triethylamine, DMF), phenols, da sauransu kamar carbon disulfide, pyridine, silicone man da birki ruwa.