PTFE high-temperature fabric (PTFE-coated fiberglass) is a premium filter media for a extreme conditions: flue gas dust kubvisa (simende, tsvina yekupisa, marasha boilers kusvika 260 ° C), corrosive liquid filtration (acids, alkalis, oils), chikafu/mishonga inosvibisa filtration, uye HEPA cleanroom filters. Isiri-tsvimbo inodzivirira guruva caking uye inobvumira kuchenesa nyore. Membrane-laminated mamakisi anowana ultra-low emissions.

PTFE high-temperature jira rinochengetedza yakanakisa magetsi ekudzivirira kubva -180°C kusvika 260°C: volume resistivity >10¹³ Ω·cm pa200°C, dielectric inogara yakagadzikana pa2.0-2.1. Pamusoro pe260 ° C, PTFE inopfava, inoora pamusoro pe327 ° C, ichirasikirwa nekudzivirira zvachose. Pazasi pe 0°C, kuvharisa kunovandudza asi kupfeka kunoita brittle. Gara mukati me260 ° C kuitira kushanda kwakavimbika.

Musoro wekupedzisa maajenti akaiswa kune jira refiberglass pamberi pePTFE coating yakakosha kune yekupedzisira PTFE yakakwirira-tembiricha machira kuita. Organosilane coupling agents inogadzira mabhiriji mamorekuru pakati peinorganic glass fiber uye organic PTFE, inowedzera masvuura simba kubva pa<2 N/cm kusvika 4-8+ N/cm. Kurapa kwakakodzera kunowedzerawo kupisa kupisa (260 ° C +), dielectric performance, uye makemikari kuramba. Mucheka usina kurapwa unotungamira kune delamination, kutubukira, uye hupenyu hupfupi hwesevhisi.

Fiberglass weave pattern - plain, twill, kana satin - inonyanya kukanganisa PTFE high-temperature machira emhando. Satin weave inopa simba repamusoro rekubvarura (2-3x plain) uye kuchinjika, yakanakira kupeta. Plain weave inopa yakanakisa dimensional kugadzikana uye peel adhesion, inokodzera static application. Twill inoenzanisa zvivakwa zvese zvekushandisa zvakajairika.

Coating uniformity yePTFE high-temperature jira inotarirwa nezvinhu zvina: coating formulation (particle size 0.15-0.35 μm, viscosity, solid content), coating & sintering process (blade coating inosarudzwa kuti ifanane), substrate quality (weave pattern, pre-treatment), uye nzvimbo yekugadzira (20-25% R <60). Dip + blade yakasanganiswa maitiro anoyera kupinda uye kutsetseka kwepamusoro.

Kuchenesa uye kugadzirisa kwakakodzera kunowedzera hupenyu hwePTFE high-temperature jira. Kuchenesa mushure mekushandisa uye mushure mekutonhora. Shandisa mabhurashi akapfava, simbi dzisina divi, kana doro kuitira tsvina. Usamboshandisa yakasimba asidhi/alkalis, bleach, kana metal scrapers. Yenguva dzose silicone mafuta lubrication inoderedza kupfeka. Tevedzera nhungamiro idzi kudzivirira kukuvadzwa kwejasi.

PTFE high-temperature jira uye silicone jira zvese zvinoshandisa fiberglass jira sechigadziko asi chinosiyana mukupfeka zvinhu (PTFE resin vs silicone rubber). PTFE inokunda mukusanamatira, kupfeka kuramba, uye makemikari kuramba kusvika 260°C. Silicone jira rinopa kuchinjika kwepamusoro, kuvharwa kwemagetsi, uye kudzivirira moto (kusvika 230 ° C). Sarudza zvichibva pane zvaunokoshesa.

PTFE high-temperature jira inopa yakasarudzika kemikari kuramba, inoshingirira maasidhi akasimba, alkalis, organic solvents, uye magasi anoparadza. Ichi chinyorwa chinodonongodza zvinhu zvayo zvinoramba, zvisingakwanisi (simbi yakanyungudutswa yealkali, yakasimba fluorinating agents), uye zvinhu zvakakosha senge tembiricha, kutarisisa, uye kushushikana kwemagetsi.

PTFE impregnation haina kugumira kune fiberglass jira. Ichi chinyorwa chinosuma 7 mamwe ma substrates - aramid, carbon fiber, PBI, porous simbi, graphite, asbestos (pased out), uye ceramic fillers - ine maitiro avo maitiro, zvakanakira, zvisingakwanisi, uye zvakakosha mashandisirwo.

Ichi chinyorwa chinotsanangura kuti sei alkali-isina fiberglass jira riri iro rinofarirwa substrate yePTFE yakakwirira-tembiricha jira. Inovhara kemikari kusungirirwa kuburikidza ne silane coupling agents uye akakosha emuviri zvimiro senge kugadzikana kwemafuta, kugadzikana kwedimensional, uye kuramba kwecorrosion - kuve nechokwadi chekuita kwenguva refu munzvimbo dzakaoma.