Tsab ntawv xov xwm 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. Core conflict: air permeability requires open pores, while insulation demands density and non-stick requires smooth surfaces. Cov tswv yim tsim kev sib npaug: tswj qhov nruab nrab 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.

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 lom neeg tsis txaus ntseeg tawm tsam cov kua qaub, alkalis, cov kuab tshuaj thiab oxidants, hydrolysis-resistant, outperforming aramid thiab P84 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 kev poob siab; Kev pom zoo heev nrog qhov pore qhov ntau thiab tsawg 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; Lub zog txhua yam los ntawm fiberglass reinforcement, nrog ntshiab PTFE fiber ntau tshaj tawm 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 tsis kam, hydrolysis tsis kam thiab kev ua haujlwm huv.

Cov kab lus no muab cov kev daws teeb meem rau kev tiv thaiv cov nplaum nplaum thiab cov nplaum nplaum thaum siv PTFE high-temperature daim kab xev los tiv thaiv PCB kub ntiv tes 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 sij hawm luv luv ≥300 ° C, nruam ≥260 ° C, tag nrho cov thickness 0.08-0.13mm nrog nyias high-cohesion nplaum txheej, thiab tiv thaiv los ntshav / residue-dawb ntawv pov thawj. 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 zoo li ntxhib gully kev ntxhib los mos nrog nce Ra / Rz qhov tseem ceeb, 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 atmospheric: outgassing 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 monoxide), 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.

Kab lus no hais txog qhov yuav tsum tau ua kom txias thaum lub sij hawm PTFE high-temperature fabric sintering. Tom qab sintering ntawm 380-400 ° C, cov ntaub yuav tsum ceev nrooj dhau ntawm 310-315 ° C crystallization-sensitive cheeb tsam. Kev pom zoo kom txias yog tsawg kawg yog 30-50 ° C / min (cov ntaub nyias nyias tuaj yeem ua tiav 100-200 ° C / min ntawm cua txias). Kev ua kom txias sai sai (quenching) ua rau qis crystallinity (45-50%), yielding mos, tawv coatings nrog du nto, muaj zog adhesion, zoo heev uas tsis yog-stick kev ua tau zoo, thiab kuj rau delamination thiab cracking. Kev ua kom txias qeeb (lub qhov cub txias) ua rau muaj cov crystallinity siab (60-70%), ua rau cov tawv tawv tawv, tawv tawv, ua rau shrinkage, tev thiab microcracks.

Kab lus no piv rau chav kub thiab kub kub kom loj hlob ntawm silicone siab-rhiab nplaum nplaum rau PTFE daim kab xev. Kub-kub maturation (120-180 ° C) tsim dense crosslinked tes hauj lwm nrog muaj zog cohesive zog, tiv thaiv cov nplaum residue tom qab tev. Nws tsim cov tshuaj anchoring bonds nrog PTFE substrates ntawm primer co-curing, tshem tawm delamination txaus ntshai. High-temperature maturation kuj tshem tawm cov tsis tshua muaj molecular volatiles ua ntej xa khoom, tiv thaiv bubbling thiab silicone roj paug thaum thawj cua sov.