PTFE ntama a ɛyɛ hyew kɛse (PTFE-coated fiberglass) yɛ premium filter media ma tebea horow a emu yɛ den: flue gas mfutuma a woyi (cement, nwura a wɔhyew, fango boilers kosi 260°C), corrosive nsu filtration (acids, alkalis, ngo), aduan / nnuru sterile filtration, ne HEPA cleanroom filters. Fafa a ɛnyɛ nea ɛbata ho no mma mfutuma ntumi nkɔ mu na ɛma ɛyɛ mmerɛw sɛ wobɛhohoro ho. Membrane-laminated grades nya mframa bɔne a ɛba fam koraa.

PTFE ntama a ɛyɛ hyew kɛse kura anyinam ahoɔden a ɛkyɛn so fi -180°C kosi 260°C: volume resistivity >1013 Ω·cm wɔ 200°C, dielectric daa pintinn wɔ 2.0-2.1. Sɛ ɛboro 260°C a, PTFE yɛ mmerɛw, ɛporɔw boro 327°C, na ɛhwere insulation daa. Wɔ 0°C ase no, insulation no tu mpɔn nanso nea wɔde kata so no bɛyɛ brittle. Tra 260°C mu na ama woatumi ayɛ adwuma a wotumi de ho to so.

Nsuo a ɛyɛ hyew akwansideɛ su a ɛwɔ PTFE adhesive tape no mu no, wɔde katasoɔ sintɔ (micropores, microcracks, fiber wicking) titire na ɛkyerɛ mmom sen PTFE no mu nsuo a ɛyɛ hu. Pure PTFE sini de WVTR a ɛwɔ mfinimfini nkutoo ma. Multi-layer coating ne lamellar fillers (mica, glass flakes) ma labyrinth nkɛntɛnso, na ɛtew vapor transmission so kɛse. Sɛ wopɛ sɛ wode nsɔano a ɛyɛ nwini kɛse di dwuma a, kyerɛ nneɛma a wɔde kata so a ɛyɛ den.

PTFE ntama a ɛyɛ hyew kɛse (PTFE-coated fiberglass) ye ma aduan conveyor belts esiane ne 260°C ɔhyew a ɛko tia, -70°C awɔw a ɛyɛ mmerɛw, ɛnyɛ nea ɛbata soro, ne FDA mmara so. Nneɛma atitiriw a wɔde di dwuma: fononoo a wɔde yɛ paanoo (bisket, paanoo, pizza), nneɛma a wɔde fa nnuan a wɔayam, nhama a ɛma ahwiesa yɛ nwini, akwan a wɔde yɛ nwini, ɔhyew a wɔde siw ano, ne roller wrapping. Ɛtew bere a wɔsɛe no ne bere a wɔde siesie nneɛma so.

PTFE a ɛyɛ hyew a ɛkorɔn adhesive tape no creep resistance wɔ bere tenten daa adesoa ase (titiriw wɔ 200-260°C) no, nneɛma abien na ɛkyerɛ: silicone PSA crosslink density (crosslinking a ɛkorɔn siw nsu a ɛsen) ne substrate type (fiberglass-reinforced PTFE gyina awɔw creep; pure PTFE film creeps). Ade a wɔde nkata so a wɔmfa nhama nkɔ mu no di nkogu ntɛmntɛm wɔ ɔhyew a ano yɛ den mu. Ntama a ɛyɛ den a wɔde nkata so no ma asiane a ɛwɔ hɔ sɛ wɔbɛwea no yɛ kɛse.

Wɔ PTFE ɔhyew a ɛkorɔn teyp a wɔde di dwuma wɔ abrasive sliding friction applications, gyinapɛn non-stick ne ɔhyew a ɛko tia no nnɔɔso. Nneɛma titiriw a wɔde paw: Taber abrasion a ɛyera (<15 mg/1000 cycles), PTFE a wɔde akata so a wɔasesa a wɔahyɛ no ma (carbon/graphite/MoS2), PV anohyeto data, substrate ahoɔden (≥200 N/cm), ne mating surface roughness (Ra 0.2-0.4 μm). Edge ahobammɔ a ɛfata ne bonding a edi mũ ho hia kɛse ma nkwa tenten.

Nneɛma a wɔde wie soro a wɔde gu fiberglass ntama so ansa na wɔde PTFE akata so no ho hia kɛse ma PTFE ntama a etwa to a ɛyɛ hyew kɛse adwumayɛ. Organosilane coupling agents yɛ molecule bridges wɔ inorganic glass fiber ne organic PTFE ntam, na ɛma peel ahoɔden kɔ soro fi <2 N/cm kosi 4-8+ N/cm. Ayaresa a ɛfata nso ma ɔhyew a ɛko tia (260°C+), dielectric adwumayɛ, ne nnuru a ɛko tia no yɛ kɛse. Ntama a wɔansiesie no ma ɛyɛ delamination, bubbling, na ɛtra hɔ bere tiaa.

Warp ne weft density a fiberglass ntama kyerɛ PTFE ntama a ɛyɛ hyew kɛse adwumayɛ. Density a ɛkorɔn ma tensile ahoɔden ne surface smoothness kɔ soro nanso ɛtew tear strength (inverted U-curve), flexibility, ne coating penetration. Density a eye sen biara ma ɛkari pɛ wɔ penetration, tete resistance, flexibility, ne surface finish. Density a ɛba fam fata dynamic bending; density a ɛkorɔn ma non-stick ne insulation.

PTFE substrate no fi awosu mu yɛ nea nkyene a wɔde petepete so (nsu a ɛtwetwe <0.01%). Nanso, teyp adwumayɛ nyinaa gyina adhesive type so: silicone PSA gyina po mu nneɛma a atwa yɛn ho ahyia ano (500-1000h nkyene a wɔde petepete sɔhwɛ ahorow,>80% peel retention); acrylic PSA no di nkogu. Nneɛma a wɔde di dwuma yiye wɔ asase ani, wɔde di dwuma a ɛnyɛ ahurututu, ne silicone sealant a wɔde bɛhyɛ anoano no ho hia kɛse ma ahotoso a ɛbɛtra hɔ bere tenten wɔ mpoano asɛnka agua ne nhyɛmma so.

Calendering – ntama a wɔde PTFE akata so a wɔde mia ahwehwɛ rollers a ɛyɛ hyew ntam wɔ 360-380°C – sesa ɔfasu no nsɛso kɛse, nea ɛma wogyae, sɛnea ɛmma nsu ntumi nkɔ mu, ne mfiridwuma mu adwumayɛ. Ɛtew roughness so fi Ra 0.5-1.0 μm kosi <0.05 μm, ɛto pinholes, ɛma sɛnea ɛko tia ɔsɛe no tu mpɔn, nanso ɛtew tetew ahoɔden ne sɛnea ɛyɛ mmerɛw so. Ɛho hia ma release liners ne anyinam ahoɔden insulation.