High-strength PTFE high-temperature npuag yog ib tug composite ntawm high-tenacity fiberglass thiab PTFE txheej. Cov ntawv thov tseem ceeb nthuav dav kev lag luam (khoom noj khoom haus, textile drying, PCB thauj), kev tiv thaiv vuam (tshav kub-sealer npog, spatter shields), demolding thiab kub xovxwm tsim (rubber molding, PV lamination), hluav taws xob rwb thaiv tsev (motor slot liners, cable wraps), architectural membranes (chaw ntau ntau lub tsev, 30+ xyoo corrosive lub neej), aerospace (pam cua sov), thiab kev siv tshwj xeeb (laser txiav, 3D luam ntawv).

Kev ziab yog ib kauj ruam tseem ceeb hauv PTFE high-temperature fabric production. Cov teeb meem feem ntau muaj xws li: tawg (hloov sai heev, tawv nqaij tawv), txheej tsiv teb tsaws (cov khoom txav mus rau saum npoo, tsis muaj zog hauv daim ntawv cog lus), pinholes / hlwv (cuam tshuam cua lossis chav), 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-ring). Cov kev daws teeb meem suav nrog kev tswj kom qhuav cov ntaub ntawv, qhov cua kom 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 muaj teeb meem. Cov additives tseem ceeb muaj xws li: cov khoom ntub dej (txo qhov nro, txhim kho kev nkag mus), cov 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 (tiv thaiv pinholes), thiab humectants (kom qhuav qeeb). Kev xaiv nyob ntawm substrate thiab kev ua tau zoo.

Nthuav fiberglass ntaub (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, siab 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.

Ua ntej ziab ntawm fiberglass ntaub yog qhov tseem ceeb rau PTFE txheej tom ntej, resin impregnation, lossis lamination. Peb txoj kev kho tseem ceeb: tshem tawm cov dej noo ntawm 105-120 ° C (10-30 min nyob ntawm qhov hnyav), dewaxing / thermal tu ntawm 300-450 ° C (LOI <0.1%, zam> 500 ° C), thiab preheating ntawm 60-100 ° C ua ntej txheej. Tswj qhov kub ntawm qhov sib xws (± 5 ° C), yuam kom dehumidification, thiab tiv thaiv cov ntaub qhwv silane hauv qab 110 ° C. Khaws cov ntaub qhuav rau hauv lub hnab ntim khoom lossis chav qhuav (<30 ° C, <40% RH).

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 tus neeg sawv cev (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 cov kev khiav hauj lwm ib txwm 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 ntawv thov 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 li kev tiv thaiv corrosion: tshuaj inertness (resists aqua regia, muaj zog alkalis, cov kuab tshuaj), qhov kub ntawm ntau yam (-70 ° C txog 260 ° C tas mus li, 350 ° C ncov), qhov ntev stability (<0.5% elongation), tiv thaiv kom tsis txhob ntog (nruab nrab) . Siv nyob rau hauv cov kav dej tshuaj, desulfurization yees, pickling tanks, thiab khoom noj khoom haus/pharma. FDA qib muaj.