Raw khoom purity yog lub hauv paus tseem ceeb ntawm PTFE high-temperature ntaub zoo. Cov impurities (cov pib residual, surfactants, hlau ions, contaminated sizing agents) ua rau ntxov ntxov thermal degradation (npua, blistering saum toj no 260 ° C), uneven non-stick nto (adhesion anchor ntsiab lus), txo hluav taws xob rwb thaiv tsev (dielectric poob, qis dua tawg voltage), tsis muaj zog mechanical zog (kev nyuaj siab concentration, / tawg). Cov ntaub ntawv purity siab kom ntseeg tau tias FDA ua raws, lub neej ntev, ua haujlwm siab PTFE daim ntaub.

PTFE-coated fiberglass ntaub sintering yuav tsum tau tuav lub sij hawm ntawm 370-400 ° C. Nruam rauv: 30-90s (nyias) mus rau 3-5+ min (thick). Batch furnaces: 5-15 feeb. Under-sintering ua rau opaque, ntxhib txheej uas tev; over-sintering ua rau yellowing, brittleness, thiab tshuaj fluoride gas tso tawm. Cov txheej txheem optimization: siv cov ntsuas kub ntawm lub cub tawg, ua qhov kev tshuaj xyuas qhov muag (semi-pob tshab, hloov tau), thiab ua cov ntawv rub tawm. Nco ntsoov xyuas kom tag nrho-thickness kub uniformity.

PTFE high-temperature npuag yuav tsum tau ceev faj tuav kom muaj kev nyab xeeb thiab siv tau ntev. Cov lus ceeb toom tseem ceeb: tsis txhob siab tshaj 260 ° C (siab dua 320 ° C tso pa tawm cov pa phem), tsis txhob muaj cov pa phem (ntxuav txheej, nthuav tawm fiberglass), tsis muaj kev ntxuav (steel wool puas tsis-stick nto), cia thermal expansion clearance (tiv thaiv tearing), thiab hloov thaum blistered los yog tev. Khaws dov, kom deb ntawm UV. Hnav cov hnab looj tes tiv thaiv tshav kub thaum tuav.

PTFE high-temperature npuag muaj ib coefficient ntawm thermal expansion (CTE) ntawm 30-60 ppm / ° C (warp / weft) - siab tshaj fiberglass ib leeg tab sis deb qis dua ntshiab PTFE (100-200 ppm / ° C). PTFE raug hloov pauv sai sai (1-2%) ntawm 19 ° C thiab 30 ° C theem hloov. Txhawm rau kom tsis txhob buckling, tearing, thiab delamination: tsim clearances dawb expansion, tsis txhob tensioning los ntawm theem hloov kub, siv tsis siv neeg tensioners ntawm conveyor siv, thiab siv anti-buckling overlap tsim. Kev tshuaj xyuas tsis tu ncua rau cov dej txias yog qhov tseem ceeb.

PTFE high-temperature fabric baking mats muaj plaub qhov txiaj ntsig tseem ceeb: kev ua haujlwm tsis zoo (tsis muaj roj lossis hmoov nplej, cov khoom noj qab zib tso tawm kom huv), qhov kub ntau (-70 ° C txog 260 ° C, muaj kev nyab xeeb rau qhov cub rau lub freezer), rov siv dua (txhiab ntau lub voj voog, yooj yim los ntxuav), thiab txawm tias kub kub (tiv thaiv kub hnyiab, sib npaug xim av). Khoom noj khoom haus-qib FDA raws, lawv outlast daim ntawv parchment thiab outperform silicone mats nrog zoo dua tshav kub hloov thiab finer nto zoo nkauj.

PTFE high-temperature npuag yog qhov tseem ceeb hauv kev lag luam tsoos tsho interlining. Cov ntawv thov tseem ceeb: seamless endless conveyor siv rau cov tshuab fusing tas li (tiv thaiv kub yaj nplaum nplaum, tsis muaj wrinkle conveying), non-stick cover thiab padding daim ntaub rau tiaj tshav kub presses (tiv thaiv platens los ntawm nplaum kab mob), conveyor siv rau dot paste / hmoov txheej kab (txheej txheem dotsing ntswj thaum lub sij hawm kev sib cuag nrog hlau) qauv nias. Thickness ranges ntawm 0.13mm (lub teeb padding) mus rau 0.55mm (hnyav-duty conveyor txoj siv sia).

Anti-static PTFE npuag yog ua tiav los ntawm ob txoj hauv kev tseem ceeb: txheej doping (sib xyaw ua cov khoom siv xws li cov pa roj carbon dub rau hauv PTFE emulsion, tsim lub network percolation ntawm qhov tseem ceeb) thiab substrate weaving (embedding conductive fibers rau hauv fiberglass daim ntaub). Surface resistivity yog tswj ntawm 10⁵–10⁹ Ω. Lub hauv paus ntsiab lus: tsim ib txoj hauv kev uas tso cov nqi hluav taws xob zoo li qub tam sim, tiv thaiv kev puas tsuaj. Grounding yog qhov yuav tsum tau ua kom muaj txiaj ntsig zoo.

PTFE high-temperature npuag (PTFE-coated fiberglass) muaj cov tshuaj tiv thaiv tshwj xeeb, tiv taus cov kua qaub (xws li aqua regia), muaj zog alkalis (hauv chav sov), cov kuab tshuaj organic, thiab cov tshuaj oxidizing. Kev zam: molten alkali hlau thiab high-temperature halogen compounds tua PTFE. Txheej kev puas tsuaj nthuav tawm fiberglass rau hydrofluoric acid thiab kub concentrated alkalis. Qhov kub siab tshaj 260 ° C txo qhov tsis kam. Rau feem ntau cov tshuaj ib puag ncig, PTFE ntaub tseem ruaj khov thiab txhim khu kev qha.

Kev ziab yog ib kauj ruam tseem ceeb hauv PTFE high-temperature fabric production. Cov teeb meem tshwm sim muaj xws li: tawg (hnyav qhuav, tawv nqaij tawv), txheej tsiv teb tsaws (cov khoom txav mus rau saum npoo, tsis muaj zog sab hauv daim ntawv cog lus), pinholes / hlwv (cua hauv huab cua lossis chav dej), cov pob dawb thiab chalking (surfactant migration lossis tsis tiav fusion), yellowing / coking (overheating ntawm additives), delamination (shrinkage theem), ntau tshaj qhov kev nyuab siab. shrinkage), nto qhuav tab sis sab hauv ntub dej (skinning ntxiab ya raws), thiab tuab npoo (cov nyhuv kas fes). Cov kev daws teeb meem suav nrog kev tswj kom qhuav profiles, kom qhov cua zoo, thiab substrate pretreatment.

PTFE emulsion impregnation ntawm fiberglass ntaub yuav tsum muaj ntau yam auxiliaries kom ua tiav cov txheej txheej, muaj zog adhesion, thiab qhov chaw tsis raug. Cov additives tseem ceeb muaj xws li: cov khoom ntub dej (txo qhov nro, txhim kho kev nkag mus), thickeners (tswj viscosity thiab txheej hnyav), pH regulators (stabilize emulsion ntawm pH 9-10), silane coupling agents (txhim adhesion rau iav), film-forming aids (PFA / FEP), kev ua haujlwm tsis zoo (PFA / FEP), kev ua haujlwm tsis zoo (tiv thaiv pinholes), thiab humectants (qhib kom qhuav). Kev xaiv nyob ntawm substrate thiab kev ua tau zoo.