PTFE high-temperature fabric insulating gaskets combine high dielectric zog (ruaj khov nyob rau hauv cov av noo), -70 ° C mus rau 260 ° C kub ntau yam, universal tshuaj tsis kam (tshwj tsis yog molten alkali hlau), non-stick deg (tiv thaiv creepage), anti-creep (fiberglass reinforcement vs. ntshiab PTFE), siab tensile zog μ0. V-0 nplaim taws ntsuas. Piv nrog rau mica, roj hmab, thiab ntshiab PTFE gaskets, PTFE daim ntaub muaj superior saj zawg zog, processability, thiab ntev mus ntev stability. Zoo tagnrho rau transformers, lub cev muaj zog rwb thaiv tsev, tshuaj flange sealing, thiab semiconductor khoom.

PTFE daim ntaub flatness thaum sintering yuav tsum nruj nro, kub, thiab tswj tswj. Cov txheej txheem tseem ceeb: stenter tshuab (pin daim hlau tuav dav, tiv thaiv weft shrinkage), gradient kub profile (slow cua sov → 380-400 ° C tuav → qeeb txias hauv qab 310 ° C ua ntej tso nro), pre-shrunk substrate (tshem weaving kev nyuaj siab ua ntej txheej), thiab uniform txheej thickness (tiv thaiv sib txawv melting). Steter restraint yuav tsum tau khaws cia kom txog thaum txias hauv qab ntawm PTFE crystallization point (kwv yees li 310 ° C) los tiv thaiv warpage.

PTFE high-temperature daim ntaub yog tsim los ntawm ib leeg-dip impregnation (ib qho dhau: ceev, tsis tshua muaj nqi, txheej nyias, ntxhib nto nrog pinholes) los yog ntau-dip impregnation (2-3+ dhau: du, ntom, tsis muaj pinhole-dawb txheej, PTFE cov ntsiab lus 50-70%, kev ua tau zoo dua, tus nqi siab dua). Ib leeg-dip suits qib qis gaskets, ib ntus mats, thiab cov ntaub ntawv breathable. Multi-dip yog yuav tsum tau rau cov zaub mov-qib ntawv ci, tsis-stick conveyor siv, high-frequency Circuit Court substrates, tshuaj liners, thiab architectural daim nyias nyias.

PTFE high-temperature fabric deg kho mob lov tshuaj inertness rau kev sib txuas / luam ntawv. Plaub txoj kev: tshuaj etching (sodium-naphthalene, nto zog 20 → 40-50 dyn / cm, ruaj khov txheej tsaus, micro-porous qauv), plasma kev kho mob (nano-roughening, functional pab pawg grafting, luv luv lub qhov rais), corona kho (thin-zaj duab xis, ceev decay, txwv qhov tob), thiab laser patternization (pre-precision carbonization). Txhua txoj kev siv lub cev roughen thiab chemically qhia cov pawg polar (C = O, -OH, -COOH) kom ua kom cov nplaum nplaum.

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 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.

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.