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).

Fiberglass npuag thermal shrinkage yog thawj qhov ua rau PTFE daim kab xev seem tsis ruaj khov. Ntawm PTFE sintering kub (360-400 ° C), residual weaving stress yog tso tawm. Yog tias tsis muaj kev txwv, cov ntaub shrinks; Yog tias txwv tsis pub, kev ntxhov siab latent raug kaw, ua rau tom qab shrinkage thaum lub sij hawm kho (150-200 ° C) thiab siv cua sov kawg. Kev daws: siv pre-heat-set fiberglass nrog <0.5% shrinkage ntawm 400 ° C, tshem tawm cov residual kev nyuaj siab ua ntej txheej.

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.

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 haujlwm yuav tsum tau ua.

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.

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 kub ceev ceev, piv txwv 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.

PTFE high-temperature npuag (PTFE-coated fiberglass) muaj plaub qhov txiaj ntsig zoo raws li kev tiv thaiv corrosion hauv ob sab phlu: tshuaj inertness (resists aqua regia, muaj zog alkalis, cov kuab tshuaj), qhov kub ntau (-70 ° C txog 260 ° C tas mus li, 350 ° C ncov), qhov ntev stability (<0.5% non-staining), elongation thiab stains. Siv nyob rau hauv cov kav dej tshuaj, desulfurization yees, pickling tank, thiab khoom noj khoom haus/pharma. FDA qib muaj.