Kab lus no suav nrog cov ntawv thov ntawm Teflon high-temperature daim ntaub (PTFE-coated fiberglass npuag) hauv aerospace teb. Cov ntaub ntawv tseem ceeb: Kev tsim cov khoom siv sib xyaw - tso tawm daim ntaub / zaj duab xis hauv autoclave molding, txheej txheej cais, kub-kub conveyor siv rau prepreg ntau lawm; Lub cav thiab kev tiv thaiv kev kub siab - thermal rwb thaiv tsev pam, firewall cladding, hloov tau yooj yim-kub sib txuas; Hluav taws xob rwb thaiv tsev thiab hlau hlua tiv thaiv - cable wrapping nyob rau hauv engine compartments thiab tsaws iav bays; Lub dav hlau sab hauv thiab kev tiv thaiv hluav taws - cov ntaub thaiv hluav taws / cov pa taws teeb meem raws li FST cov qauv, thermal / acoustic rwb thaiv tsev pam cladding; Qhov chaw thiab aerospace daim ntaub ntawv - ntau txheej rwb thaiv tsev (MLI) cov rooj sib txoos, tiv thaiv khaub thuas-weld lubrication liners rau lub hnub ci vaj huam sib luag xa tawm mechanisms thiab kav hlau txais xov hinges, thermal tswj ntaub.

Kab lus no piav qhia yuav ua li cas PTFE txheej daim ntawv cog lus rau fiberglass ntaub substrate hauv Teflon high-temperature ntaub. Kev sib txuas ncaj qha tshuaj tsis tuaj yeem ua tsis tau vim PTFE's ultra-low nto zog. Bonding yog tiav los ntawm: Mechanical interlocking (lub cev sib txuas) - PTFE emulsion penetrates fiber ntau thiab grips fiber bundles tom qab sintering; Silane coupling tus neeg saib xyuas pretreatment - tsim choj molecular ntawm inorganic iav fibers thiab organic primer; Tshuaj primer hloov txheej txheej - siv PAI, PPS, PES los yog PEEK resins nrog PTFE micropowder, thov tom qab kev kho mob coupling los tsim robust kev hloov txheej; Kub-melt nplaum zaj duab xis lamination - FEP los yog PFA films (melting point 260-310 ° C) daim ntawv cog lus ua ntej tsim PTFE zaj duab xis rau ntaub; Gradient qauv ntawm ntau yam impregnation thiab sintering cycles - dilute thawj dhau nrog binder / coupling tus neeg saib xyuas nkag mus tob rau hauv fibers, ua raws li cov ntshiab PTFE impregnations, tsim compositional gradient los ntawm fiberglass mus rau ntshiab PTFE.

Kab lus no hais txog yuav ua li cas microporous qauv tsim ntawm breathable Teflon (PTFE) high-temperature daim kab xev sib npaug huab cua permeability nrog rwb thaiv tsev thiab tsis-stick zog. Cov teeb meem tseem ceeb: huab cua permeability yuav tsum tau qhib qhov pores, thaum lub rwb thaiv tsev xav tau ceev thiab tsis-stick yuav tsum tau du nto. Cov tswv yim tsim kev sib npaug: tswj qhov nruab nrab qhov pore txoj kab uas hla (0.1-2μm, qhov zoo tshaj <0.5μm) kom tiv thaiv yaj nkag mus thiab tswj qhov hluav taws xob tawg; tswj porosity ntawm 50-70% (≈60% pom) ua tiav Gurley 20-100s / 100cc thiab dielectric zog ≥2kV rau 0.13mm zaj duab xis; txais yuav high-tortuosity 3D network pore qauv (τ≈2.5-4) txhawm rau txhawm rau ncaj qha los ntawm kev tso tawm; tsim asymmetric gradient pore qauv nrog ntom ntom ntawm daim tawv nqaij txheej (1-5μm) rau tsis-stick / rwb thaiv tsev thiab ntxeem tau sab hauv rau breathability; siv super-oleophobic / hydrophobic nto tom qab kev kho mob yam tsis muaj pore blockage.

Cov kab lus no nthuav tawm qhov zoo ntawm PTFE cov ntaub ntawv kub-kub raws li qhov kub-kub lim xov xwm. Rau lub zog tseem ceeb: Qhov kub thiab txias tsis tu ncua (nruam 260 ° C, ncov ~ 300 ° C), tshaj PPS (190 ° C) thiab aramid (200 ° C); Cov tshuaj inertness heev tiv thaiv cov kua qaub, alkalis, cov kuab tshuaj thiab oxidants, hydrolysis-resistant, outperforming aramid thiab P84 nyob rau hauv corrosive flue gas; Superior plua plav tu kev ua tau zoo nrog ultra-low nto zog ua kom yooj yim plua plav ncuav mog qab zib tshem tawm thiab ua kom tsis muaj zog poob; Kev pom zoo heev nrog qhov ntau thiab tsawg ntawm 0.1-3μm capturing tshaj 99.99% ntawm PM2.5 hais; Non-flammable nrog LOI saum toj 95%, nrog rau kev xaiv los tiv thaiv zoo li qub; Cov neeg kho tshuab siab zog los ntawm fiberglass reinforcement, nrog ntshiab PTFE fiber media muab kev yooj yim thiab> 4 xyoo kev pab cuam lub neej. Muab piv rau PPS, aramid, Nomex, P84 thiab fiberglass lim xov xwm thoob plaws qhov kub, tshuaj tiv thaiv, hydrolysis tsis kam thiab kev ua haujlwm huv.

Kab lus no muab cov kev daws teeb meem rau kev tiv thaiv cov nplaum nplaum thiab cov nplaum nplaum thaum siv PTFE daim kab xev kub kub los tiv thaiv PCB cov ntiv tes kub thaum lub sij hawm SMT sib dhos. Hauv paus ua rau kev tsom xam: residue tshwm sim los ntawm kev sib koom ua ke tsis ua haujlwm lossis kev hloov pauv ntawm lub ntsej muag; los ntshav tshwm sim los ntawm viscosity poob thiab nplaum nplaum nyob rau hauv reflow tshav kub. Cov txheej txheem tseem ceeb yog xaiv cov kab xev kom zoo: silicone PSA nrog lub sijhawm luv luv ≥300 ° C, nruam ≥260 ° C, tag nrho cov tuab 0.08-0.13mm nrog nyias cov nplaum nplaum nplaum nplaum, thiab cov ntawv pov thawj los tiv thaiv los ntshav / residue-dawb. Kev tswj 6-kauj ruam: ua ntej lamination tu nrog IPA; xoom-tension lamination nrog kev khiav tawm ntawm huab cua; optimized reflow kub profile nrog maj mam cua sov (<2 ° C / s); txias peeling hauv qab 50 ° C ntawm 180 ° kaum; ua tam sim ntawd hauv 24 teev thiab siv ib zaug xwb; tsis ua hauj lwm tuav nrog IPA so thiab 40-50x magnifier tshuaj xyuas. Rau ob-sided PCBs, hloov nrog daim kab xev tshiab ua ntej ua haujlwm thib ob.

Kab lus no muab cov lus qhia txog kev tiv thaiv wrinkles ntawm PTFE high-temperature daim ntaub thaum sintering. Wrinkles yog tsim los ntawm qhov tsis sib xws ntawm thermal shrinkage thiab kev ntxhov siab tsis sib xws. Cov kev daws teeb meem suav nrog kev ua haujlwm puv ntoob: cov khoom siv raw khoom substrate tswj (ua tiav dewaxing / cua sov teeb tsa kom tshem tawm cov kev ntxhov siab sab hauv); impregnation thiab ziab (ntau txheej nyias, maj mam kub gradient, nquag tsav rollers); sintering furnace tswj (1-3% overfeed rau thermal shrinkage pub, kaw-voj micro-tension tswj, transverse kub uniformity nyob rau hauv ± 5 ° C, gradient preheating-sintering-txias nkhaus, cua-flotation furnaces raws li kev daws teeb meem, curved spreader rollers); cua txias thiab teeb tsa (muab maj mam txias, tswj kev sib kis kom txog thaum qis dua 100 ° C, tag nrho txias ua ntej winding); Kev tshuaj xyuas online nrog kev tshuaj xyuas lub teeb muaj zog thiab infrared scanning.

Kab lus no tshuaj xyuas seb cov xuab zeb blasting lossis matt tiav kev kho mob cuam tshuam rau cov qauv saum npoo ntawm PTFE cov ntaub ntawv kub. Cov kev hloov pauv tshwm sim nyob rau hauv peb qhov loj me: Microscopic morphology hloov los ntawm daim iav zoo li lub ntsej muag zoo li ntxhib ntxhib ntxhib ntxhib ntxhib ntxhib los mos nrog cov txiaj ntsig Ra / Rz nce ntxiv, tsim 3D mechanical anchoring qauv rau kev sib txuas tom qab. Txheej kev ncaj ncees ntsib kev pheej hmoo: PTFE txheej thinning, muaj peev xwm raug ntawm fiberglass substrate (ua rau poob ntawm cov khoom tsis-stick, noo noo nkag mus, thiab txo cov neeg kho tshuab lub zog), ntxiv rau microcracks thiab khib nyiab tiam.

Kab lus no qhia txog cov txheej txheem ua tiav rau impregnating fiberglass ntaub nrog PTFE emulsion. Xya cov kauj ruam tseem ceeb: ① Pretreatment (dewaxing / desizing) ntawm 350-400 ° C kom tshem tawm cov khoom siv textile sizing; ② Emulsion formulation nrog 40-55% khoom cov ntsiab lus thiab surfactants rau txhim kho wetting; ③ Impregnation ntawm dip-squeeze txoj kev los yog kws kho hniav txheej txheej; ④ Qhuav ntawm 100-150 ° C kom maj mam evaporate dej thiab tsim PTFE zaj duab xis qhuav; ⑤ Sintering ntawm 360-390 ° C (txog 400 ° C) kom yaj PTFE hais rau hauv zaj duab xis tas mus li; ⑥ Ntau lub voj voog impregnation-qhuav-sintering rov ua dua 2-4 zaug kom ncav cuag lub hom phiaj tuab thiab cov ntsiab lus resin (45-65%); ⑦ Kev kho mob tom qab suav nrog kev kho mob corona, ntug trimming, winding thiab kev soj ntsuam zoo. Cov ntsiab lus tseem ceeb tswj: ua kom tiav dewaxing, puv emulsion ntub dej, maj mam ziab, meej sintering kub, thiab zoo ib yam txheej ceev. Cov khoom lag luam ua haujlwm ntau zaus tooj liab-clad laminates, high-temperature conveyor siv thiab architectural membrane cov ntaub ntawv.

Tsab ntawv xov xwm no suav nrog cov ntsuas kev ua haujlwm tseem ceeb rau PTFE cov kab xev kub kub siv hauv lub tshuab nqus tsev, lub tshuab nqus tsev kho cua sov thiab cov chaw zoo sib xws. Cov kev cai tseem ceeb sib txawv heev ntawm kev siv huab cua: kev tawm tsam yog qhov tseem ceeb tshaj plaws (TML≤1%, CVCM≤0.1%; aerospace / optical qib yuav tsum TML≤0.5%, CVCM≤0.01%); Qhov kub thiab txias yuav tsum tau kuaj xyuas rau ob qho tib si PTFE substrate (260 ° C) thiab nplaum txheej; tshwj xeeb purified low-outgassing silicone PSA yuav tsum tau tiv thaiv siloxane paug; high-temperature tuav lub zog tiv thaiv creep thiab ntug lifting; huv si xav tsis muaj fiber ntau los thiab cov ntsiab lus ionic tsawg; anti-static daim kab xev (nto resistivity 10⁶-10⁹ Ω / sq) tiv thaiv ESD kev puas tsuaj; plasma kuj yuav tsum raug soj ntsuam rau cov txheej txheem sputtering / PECVD; thermal shrinkage qis dua 2% ua kom cov npog qhov tseeb.

Kab lus no qhia txog cov kuab tshuaj organic uas PTFE cov ntaub ntawv kub kub tuaj yeem tiv taus. PTFE-coated fiberglass ntaub nthuav tawm tshwj xeeb tshuaj inertness, tiv taus ze li ntawm tag nrho cov organic solvents nyob rau hauv ib txwm ua hauj lwm tej yam kev mob yam tsis muaj dissolution, o los yog tshuaj tiv thaiv. Cov hom kev zam muaj xws li: cawv (methanol, ethanol, isopropanol), ketones (acetone, MEK, cyclohexanone), esters (ethyl acetate, butyl acetate), hydrocarbons (gasoline, toluene, xylene, hexane), halogenated hydrocarbons (dichlorochloromethane, carbon dichloromethane), ether, THF), organic acids (glacial acetic acid, formic acid), amines thiab amides (triethylamine, DMF), phenols, thiab lwm yam xws li carbon disulfide, pyridine, silicone roj thiab nres kua.