Saa asɛm yi ka sɛnea wɔde coating machine line ahoɔhare ne oven tenten hyia de hwɛ hu sɛ organosilicone adhesive du botae curing degree ma high-temperature PTFE tape. Core matching nnyinasosɛm: bere a wɔde tra hɔ nyinaa t_total = fononoo tenten a etu mpɔn L ÷ line ahoɔhare v ɛnsɛ sɛ ɛba fam sen bere a wɔhwehwɛ sɛ wɔde sa yare a ɛba fam koraa. Nya ayaresa su denam DSC anaa adhesive ayaresa sɔhwɛ ahorow a ɛde 'ɔhyew — ayaresa bere a ɛba fam' abusuabɔ si hɔ. Equivalent cumulative cure model: kyekyɛ fononoo mu yɛ no zones, bu ti=Li/v ne tcure(Ti), hwɛ hu sɛ ∑(ti/tcure(Ti)) ≥1. Nkontaabu nhyehyɛe: hyehyɛ ɔhyew mmeae a ne tenten yɛ Li ne ɔhyew Ti; set line speed v, bu zone biara tena bere ne ntoboa ratio; san yɛ bio kosi sɛ ne nyinaa bɛyɛ ≥1 (wɔkamfo kyerɛ ahobammɔ kwan 1.1-1.2).

Saa asɛm yi ka akwan a wɔfa so hwɛ PTFE a wɔde kata Teflon ntama a ɛyɛ hyew kɛse so no ahwehwɛ so ho asɛm. Cooling rate regulation yɛ tẽẽ na etu mpɔn sen biara: Nwini a ɛba ntɛmntɛm (quenching) denam mframa a ɛyɛ nwini ntama, onwini rollers anaa nsu tank so — molecule nkɔnsɔnkɔnsɔn no yɛ nwini ansa na wɔayɛ nhyehyɛe a wɔahyɛ, na ɛyɛ ahwehwɛ nketenkete a ɛnyɛ pɛ; coating yɛ mmerɛw, ɛyɛ den a optimized non-stick adwumayɛ, kakra tew hardness / wear resistance. Slow cooling (annealing) via ɔhyew a wɔkora so ɔfã wɔ 10-50 ° C / h anaasɛ fononoo onwini — molecule nkɔnsɔnkɔnsɔn nhyehyɛe koraa yɛ spherulites akɛse a edi mũ; coating wɔ hardness a ɛkorɔn, ɛda nsow wear resistance, stable dimensions, tew flexibility ne nkɔanim brittleness.

Saa asɛm yi ka Teflon ntama a ɛyɛ hyew kɛse a wɔde gu fononoo a mframa a ɛyɛ hyew di akɔneaba mu ho asɛm. Feasibility: wɔde di dwuma sɛ non-stick cushion wɔ mesh belts anaa trays bere a fononoo hyew ≤260 ° C (low-ɔhyew drying, binder yiyi, slurry curing) — tu mpɔn demolding ne picking efficiency. Wɔabara koraa wɔ ɔhyew a ɛwɔ mfinimfini/ɛkɔ soro (300-950°C) — PTFE porɔw ma awuduru HF ne perfluoroisobutylene fi mu ba, ɛma nnwinnade no sɛe na ɛde awuduru a edi awu ba. Ahobammɔ nnyinasosɛm: sɛ fononoo mu hyew mu nna hɔ anaasɛ wontumi nhyɛ bɔ sɛ ɛbɛba fam sen 260°C a, mfa nni dwuma. Nneɛma titiriw: ɔsom a ɛkɔ so -70°C kosi 260°C, bere tiaa mu 300°C; a ɛnyɛ nea ɛbata ho ne nnuru a ɛnyɛ adwuma a ɛtra so; anyinam ahoɔden a wɔde siw anyinam ahoɔden ano a eye kyɛn so; friction a ɛba fam (~ 0.04); fiberglass nnyinaso ma ahoɔden a ɛkorɔn a ɛtwetwe.

Saa asɛm yi de nsonsonoe a ɛda infrared radiation heating ne hot-air circulation heating curing akwan horow ntam toto crosslinked structure uniformity of silicone adhesive layers ho. Ɔhyew a wɔde kɔ baabi foforo: mframa a ɛyɛ hyew de ne ho to convection-conduction a ɔhyew a ɛkɔ soro brɛoo, ɔhyew mu nsonsonoe ketewaa bi a ɛwɔ mu/akyi so; IR wɔ bun a ɛhyɛn mu a anohyeto wom a ɛwɔ soro a ɛtwetwe denneennen (micrometer du kosi ɔhaha pii) a ɛma ɛyɛ sorokɔ-kɔ-mfinimfini a ɛyɛ toro. Nkɛntɛnso a ɛwɔ crosslink biakoyɛ so: mframa a ɛyɛ hyew ma wotumi yɛ synchronous curing wɔ mu ne akyi a crosslink density yɛ pɛ; IR ma soro layer yɛ ntɛmntɛm dense 'skin film' a esiw ɔhyew a ɛkɔ ne emu nkɔnsɔnkɔnsɔn kankan, ma crosslink density so tew fi soro kɔ mu.

Saa asɛm yi ka nsonsonoe a ɛda PTFE emulsions a wɔyɛ denam suspension polymerization vs dispersion polymerization ntam. Nkyerɛkyerɛmu: suspension polymerization ntumi nyɛ PTFE emulsion tẽẽ; nokware PTFE emulsion fi dispersion polymerization nkutoo mu. 'Suspension-kwan emulsion' yɛ nokwarem no nsu suspension a asase suspension-polymerized resin micropowders. Dispersion polymerization (primary emulsion): spherical particles (0.1-0.3μm, teateaa nkyekyɛmu), stabilized denam perfluorinated surfactants, molecule mu duru a ɛkorɔn yiye (>94% crystallinity), fibrillation a emu yɛ den, hwehwɛ 380 ° C sintering na ayɛ kɔ so tough film.

Saa asɛm yi ka sɛnea wɔde peroxide crosslinking agents (BPO ne DCP) a ɛporɔw hyew ne ne fã nkwa nna bɛyɛ pɛ ne curing process window a wɔde yɛ Teflon tape no ho. Core data: BPO — 1-simma fã nkwa wɔ ~ 131 ° C, 1-hr wɔ ~ 92 ° C, 10-hr wɔ ~ 72 ° C; DCP — 1-min wɔ ~ 171 ° C, 1-hr wɔ ~ 135 ° C, 10-hr wɔ ~ 115 ° C. Nteaseɛ a ɛne ne ho hyia: adhesive hia 97-99% crosslinking = 5-7 fã-nkwa; bere a wɔde sa yare = 5-7 × nkwa fã wɔ ɔhyew a wɔde asi wɔn ani so no mu. Back-bu ɔhyew fi production line residence bere anaasɛ back-bu bere fi maximum a wɔma ho kwan.

Saa asɛm yi kata typical line ahoɔhare range ma PTFE high-temperature ntama impregnation production line. Ahoɔhare a wɔtaa de di dwuma: 2-15 m/min, adwumayɛ kwan a ɛyɛ den 3-8 m/min, ntama a ɛyɛ tratraa/ahoɔhare kɛse nhama a ɛkɔ 10-15 m/min. Anohyeto ahorow a efi nsu a wɔde hyɛ mu no mu: ɛsɛ sɛ wɔde PTFE emulsion hyɛ ntama mu ma koraa kɔ fiber bundle mu — ahoɔhare a ɛkɔ soro dodo ma nsu nhyɛ mu yiye, resin kɔm ne nhama a ɛyɛ dry; emulsion viscosity, solids concentration, fabric weave density nyinaa tew penetration rate so, na ɛhwehwɛ sɛ wɔde ahoɔhare yɛ brɛoo ma ntama a ɛyɛ den/dense. Coating passes: passes pii (2-6+) a ɛho hia ma dense defect-free coating; first pass slower for anchoring, akyiri yi passes betumi akɔ soro kakra.

Saa asɛm yi de nsonsonoe a ɛda infrared radiation heating ne hot-air circulation heating ntam toto crosslinked structure uniformity of silicone adhesive layer ho. Ɔhyew a wɔde kɔ baabi foforo: mframa a ɛyɛ hyew yɛ convection-conduction, ɛyɛ brɛoo na ɛkɔ so, na ɛma ɔhyew a ɛkɔ soro a ɛkɔ fam; IR yɛ radiation-absorption a ɛwɔ soro absorption a emu yɛ den (micrometers kosi millimeters) a ɛma ɛyɛ mmepɔwmmepɔw soro-kɔ-mfinimfini gradient. Nkɛntɛnso a ɛwɔ crosslink density kyekyɛ so: mframa a ɛyɛ hyew ma emu ne akyi afã horow no tumi hyɛn vulcanization temperature range mu ɛkame ayɛ sɛ bere koro mu, na ɛma crosslink density a ɛyɛ pɛ wɔ thickness no mu; IR ma ɔfasu a ɛwɔ soro no sa ntɛm ara a ɛyɛ honam ani a ɛyɛ den a esiw ɔhyew a ɛkɔ baabi foforo kwan, na ɛde sharp gradient of crosslink density so tew fi soro kɔ mu ba.

Saa asɛm yi ka silica a ɛwɔ mu ne sɛnea wɔde di dwuma wɔ silica ahwehwɛ nhama a ɛdɔɔso ntama mu ho asɛm. Silica content specification: core indicator ne SiO2 ≥96% (gyinabea 96-98%, premium grades >99% denam acid leaching ne sintering, bɛn quartz fiber kronkron). Nneɛma a wɔyɛ: E-glass ntama no fa acid a ɛyɛ hyew mu ma ɛpete nneɛma a ɛnyɛ silica (boron oxide, sodium oxide), na ɛma ɛyɛ nnompe a silica pii wom a ɛwɔ abon, afei wɔde sintered ma ɛyɛ den. Mfaso titiriw: ɔsom adwuma a ɛkɔ so wɔ 900°C wɔ wim tebea a ɛyɛ hyew mu, bere tiaa mu boro 1200°C, beae a ɛyɛ mmerɛw a ɛbɛn 1700°C; nnuru a ɛgyina pintinn tia acid/alkali dodow no ara gye HF ne phosphoric acid a ɛyɛ hyew; dielectric constant a ɛba fam ne insulation a ɛyɛ den wɔ ɔhyew a ɛkɔ soro mu.

Saa asɛm yi kyerɛkyerɛ Teflon ntama a ɛyɛ hyew kɛse no microstructural su ahorow mu. Substrate nnompe: glass fiber weaving texture wɔ plain/twill weaves a porosity a ɛkorɔn (micron-scale pores wɔ fiber bundles mu ne wɔ warp-weft nodes) a ɛma baabi ma PTFE impregnation. Coating morphology: full impregnation encapsulation a ɛyɛ 'reinforced concrete' nhyehyɛe a ahwehwɛ nhama reyɛ den phase, PTFE yɛ matrix a ɛkɔ so; surface nodular microstructure of nodules (particles) a fibrils fɛfɛ a ɛba bere a wɔreyɛ sintering no abɔ mu; honam ani a ɛyɛ den a ɛkɔ so (a ne kɛse yɛ micron pii kosi du du) a ɛyɛ PTFE kronkron sɛ akwanside titiriw a ɛmma nnuru ntumi nyɛ adwuma, nneɛma a ɛnyɛ nea ɛbata ho, ne anyinam ahoɔden a wɔde siw ano.