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 coj ua 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 cov ntaub ntawv, qhov cua kom zoo, thiab substrate pretreatment.

Expanded fiberglass npuag (bulked yarn fabric) txawv hauv paus los ntawm cov pa fiberglass npuag hauv cov qauv xov paj. Los ntawm kev kho cua dav hlau siab, cov iav filaments txuas ntxiv raug sib cais, crimped, thiab fluffed rau hauv voluminous, paj zoo li xov paj. Qhov no tsim cov ntaub thicker, softer nrog superior thermal rwb thaiv tsev (cua khaubncaws sab nraud povtseg), zoo conformability, ntau pom efficiency, thiab txhim kho kua muag / flex kuj - ntawm tus nqi ntawm lub zog tensile zog me ntsis. Siv rau qhov kub kub gaskets, yeeb nkab qhwv, lim hnab, thiab qhov cub seals.

Raw khoom purity yog lub hauv paus ntawm PTFE high-temperature npuag kev ua tau zoo. High-purity PTFE emulsion (tsis muaj hlau ions, tsis tshua muaj-molecular-yuag residues) ua kom cov cua sov tsis kam (tsis yellowing mus txog 260 ° C), ruaj khov tsis-stick, thiab siab dielectric zog. Rau fiberglass, alkali-dawb E-iav (Na₂O <0.8%) tswj lub zog thiab rwb thaiv tsev ntawm qhov kub thiab txias; nruab nrab / siab-alkali iav ua rau degradation. Ua kom tiav kev tshem tawm ntawm cov xov paj sizing tiv thaiv carbonization thiab delamination. Purity ncaj qha cuam tshuam rau lub neej kev pabcuam, kev ua raws li qib zaub mov, thiab kev ntseeg tau ntawm hluav taws xob.

PTFE high-temperature npuag (PTFE-coated fiberglass) yog ze li ntawm chemically inert, tab sis qee yam khoom ua rau corrosion nyob rau hauv tej yam kev mob. PTFE ncaj qha nres tshwm sim nrog molten alkali hlau (sodium, poov tshuaj), muaj zog fluorinating agents (F₂, ClF₃) ntawm qhov kub thiab txias, thiab molten muaj zog alkalis saum 300 ° C. Indirect corrosion tshwm sim thaum hydrofluoric acid (HF), kub concentrated alkalis, los yog kub phosphoric acid nkag mus rau txheej tsis xws luag thiab tua lub fiberglass substrate. Rau kev pabcuam tshuaj lom neeg, siv cov yeeb yaj kiab PTFE ntshiab tsis muaj fiberglass.

PTFE high-temperature npuag (PTFE-coated fiberglass) muaj cov thermal poob siab zoo nyob rau hauv nws qhov kev ua haujlwm ntawm -70 ° C txog 260 ° C. Nws tuaj yeem tiv taus kev kub ceev ceev, xws li txav los ntawm -50 ° C lub freezer mus rau 260 ° C kub xovxwm. Cov qib hwm tseem muaj sia nyob tam sim ntawd txias los ntawm 260 ° C rau hauv dej 10 ° C. Txawm li cas los xij, kev poob siab ntawm cov khoom los ntawm qhov kub siab tshaj 300 ° C (ze PTFE's 327 ° C melting point) yuav ua rau tawg tam sim ntawd thiab delamination. Lub fiberglass substrate muab qhov ntev stability; PTFE txheej yog qhov txwv.

PTFE high-temperature npuag yog dav siv nyob rau hauv kev lag luam tshuaj rau xya daim ntaub ntawv tseem ceeb: flange gaskets thiab cov yeeb nkab hauv ob sab phlu (resists muaj zog acids / alkalis), reactor thiab tank linings (tiv thaiv hlau corrosion, yooj yim tu), lim hnab rau corrosive flue gas (txog 260 ° C), anti-corrosion expansion pob qij txha rau ducts, ducts, molding, thiab hluav taws xob / thermal rwb thaiv tsev qhwv. FDA thiab UL qib muaj.