Saa asɛm yi ka sɛnea microporous structure design of breathable Teflon (PTFE) high-temperature tape kari pɛ wɔ mframa a ɛkɔ mu ne insulation ne non-stick su ahorow ho. Core ntawntawdi: mframa a ɛtumi fa mu no hwehwɛ sɛ ntini a ɛbue, bere a insulation hwehwɛ sɛ ɛyɛ den na nea ɛnkyere so hwehwɛ sɛ ɛwɔ soro a ɛyɛ torotoro. Nsusuwii akwan a ɛkari pɛ: hwɛ sɛnea wɔkyekyem pɛpɛɛpɛ a, pore diameter (0.1-2μm, sɛnea ɛbɛyɛ yiye no <0.5μm) so na wɔasiw melt penetration ano na wɔakura breakdown voltage mu; control porosity wɔ 50-70% (≈60% optimal) a wonya Gurley 20-100s/100cc ne dielectric ahoɔden ≥2kV ma 0.13mm film; fa 3D network pore nhyehyɛe a ɛyɛ tortuosity kɛse (τ≈2.5-4) tom de siw nsu a ɛkɔ tẽẽ no ano; yɛ asymmetric gradient pore nhyehyɛe a dense surface skin layer (1-5μm) ma non-stick/insulation ne porous mu ma breathability; fa super-oleophobic / hydrophobic soro akyi ayaresa a enni pore blockage.

Saa asɛm yi de mfaso a ɛwɔ PTFE ntama a ɛyɛ hyew kɛse so sɛ nneɛma a wɔde yiyi nneɛma a ɛyɛ hyew kɛse so. Ahoɔden atitiriw asia: Ɔhyew a ɛda nsow a ɛko tia (260°C a ɛkɔ so, ne sorokɔ ~300°C), ɛboro PPS (190°C) ne aramid (200°C); Nnuru a ɛnyɛ adwuma koraa a ɛko tia acid, alkalis, solvents ne oxidants, hydrolysis-resistant, ɛyɛ adwuma sen aramid ne P84 wɔ corrosive flue gas mu; Mfutuma ho tew adwumayɛ a ɛkorɔn a ɛwɔ soro ahoɔden a ɛba fam koraa a ɛma wotumi yi mfutuma keeki a ɛyɛ mmerɛw na nhyɛso a ɛba fam a ɛkɔ so daa; Filtration efficiency a ɛkyɛn so a pore akɛseɛ 0.1-3μm kyere bɛboro 99.99% PM2.5 asinasin; Ɛnyɛ ogya a LOI boro 95%, a anti-static options wɔ hɔ; Mfiri ahoɔden a ɛkorɔn a efi fiberglass ahoɔden mu, a PTFE fiber media kronkron a ɛde nsakrae ne >mfe 4 ɔsom nkwa ma. Wɔde toto ho yiye tia PPS, aramid, Nomex, P84 ne fiberglass filter media wɔ ɔhyew, nnuru a ɛko tia, hydrolysis a ɛko tia ne ahotew adwumayɛ mu.

Saa asɛm yi de ano aduru a wɔahyehyɛ a wɔde besiw adhesive nkae ne adhesive mogya ano bere a wɔde PTFE a ɛyɛ hyew kɛse teyp redi dwuma de abɔ PCB sika kɔkɔɔ nsateaa ho ban bere a wɔreyɛ SMT nhyiam no ma. Ntini a ɛde ba nhwehwɛmu: nkae no ba fi huammɔdi a ɛka bom anaasɛ ntamgyinafo a wɔde kɔ baabi foforo mu; mogya fi viscosity drop ne adhesive overflow wɔ reflow ɔhyew ase. Core ano aduru ne tape paw a ɛfata: silicone PSA a bere tiaa mu peak ≥300 ° C, kɔ so ≥260 ° C, ne nyinaa thickness 0.08-0.13mm ne tratraa high-cohesion adhesive layers, ne anti-mogya / nkae-free adansedi. Anamɔn asia nhyehyɛe a wɔde di dwuma: pre-lamination ahotew a wɔde IPA; zero-tension lamination a mframa a ɛkɔ nipadua no mu nyinaa; optimized reflow ɔhyew profile a ɔhyew brɛoo (<2 ° C / s); awɔw mu a wɔde yiyi ne ho wɔ 50°C ase wɔ 180° anim; wɔyɛ ho adwuma ntɛm ara wɔ nnɔnhwerew 24 ntam na wɔde di dwuma pɛnkoro pɛ; huammɔdi ho dwumadie a wɔde IPA popa ne 40-50x magnifier nhwehwɛmu. Sɛ wopɛ PCB a ɛwɔ afã abien a, fa teyp foforo si ananmu ansa na woayɛ ɔfã a ɛto so abien ho adwuma.

Saa asɛm yi de akwankyerɛ a wɔahyehyɛ ma wɔ sɛnea wobesiw nwi a ɛbɛba PTFE ntama a ɛyɛ hyew kɛse so bere a wɔreyɛ sintering no ho. Nea ɛde nwi a ɛyɛ nwininwini ba titiriw ne ɔhyew a ɛtwetwe a ɛnyɛ pɛpɛɛpɛ ne adwennwen a ɛnkɔ so pɛpɛɛpɛ. Ano aduru kata adwumayɛ kwan a edi mũ so: raw material substrate control (dewaxing/ɔhyew nhyehyɛe a edi mũ de yi emu nhyɛso fi hɔ); impregnation ne drying (nneɛma a ɛyɛ tratraa pii a wɔde kata so, ɔhyew a ɛkɔ soro brɛoo, active drive rollers); sintering fononoo sohwɛ (1-3% overfeed ma ɔhyew shrinkage allowance, closed-loop micro-tension control, transverse ɔhyew biakoyɛ wɔ ±5 ° C, gradient preheating-sintering-cooling curve, mframa-flotation fononoo sɛ ano aduru a eye sen biara, curved spreader rollers onwini ne nhyehyɛe (nwini a ɛyɛ brɛoo nkakrankakra, kɔ so trɛw kosi sɛ ɛbɛba fam 100°C, onwini a edi mũ ansa na woabɔ); intanɛt so hwɛ a wɔde hann a emu yɛ den hwɛ ne infrared scanning.

Saa asɛm yi hwehwɛ sɛnea sandblasting anaa matt finishing treatment nya PTFE ntama a ɛyɛ hyew kɛse no ani nhyehyɛe so nkɛntɛnso. Nsakrae ba wɔ afã abiɛsa: Microscopic morphology dan fi ahwehwɛ a ɛte sɛ ahwehwɛ a ɛyɛ torotoro so kɔ gully texture a ɛyɛ mmerɛw a Ra/Rz gyinapɛn ahorow kɔ soro kɛse, na ɛma 3D mfiri anchoring nhyehyɛe ahorow ma nkitahodi a edi hɔ. Coating integrity hyia asiane ahorow: PTFE layer thinning, fiberglass substrate a ebetumi ada adi (a ɛde nneɛma a ɛnyɛ nnam a ɛyera, nsu a ɛkɔ mu, ne mfiri ahoɔden a ɛso tew), ne microcracks ne debris awo ntoatoaso.

Saa asɛm yi de mfitiaseɛ kwan a edi mũ a wɔfa so de PTFE emulsion hyɛ fiberglass ntama mu no ba. Anamɔn atitiriw ason: 1 Pretreatment (dewaxing/desizing) wɔ 350-400°C de yi nneɛma a ɛma ntama yɛ kɛse fi hɔ; 2 Emulsion formulation a 40-55% solid content ne surfactants ma nsuo a ɛkɔ anim; 3 Impregnation denam dip-squeeze kwan anaa oduruyɛfo blade coating so; 4 Wɔma ɛyow wɔ 100-150°C ma nsuo no yɛ brɛoo na ɛyɛ PTFE film a ɛyɛ dry; 5 Sintering wɔ 360-390°C (ɛkɔ 400°C) de nwene PTFE asinasin no ma ɛbɛyɛ film a ɛkɔ so; 6 Multi-cycle impregnation-drying-sintering a wɔsan yɛ no mpɛn 2-4 sɛnea ɛbɛyɛ a wobedu botae no mu duru ne resin a ɛwɔ mu (45-65%); 7 Ayaresa akyi a corona ayaresa, anoano trimming, winding ne quality inspection ka ho. Core control points: dewaxing koraa, emulsion wetting a edi mũ, nkakrankakra drying, sintering hyew pɛpɛɛpɛ, ne coating density a ɛkɔ so daa. Nneɛma a wɔyɛ no som laminates a wɔde kɔbere adura ho a ɛyɛ frequency a ɛkorɔn, conveyor belts a ɛyɛ hyew kɛse ne adansi membrane nneɛma.

Saa asɛm yi ka adwumayɛ ho nsɛnkyerɛnne titiriw ma PTFE ɔhyew a ɛkorɔn teapɔn a wɔde di dwuma wɔ vacuum coating, vacuum ɔhyew ayaresa ne mmeae a ɛtete saa ho asɛm. Ahwehwɛdeɛ titire no yɛ soronko kɛseɛ wɔ wim dwumadie ho: mframa a wɔde fi adi no ho hia paa (TML≤1%, CVCM≤0.1%; ahunmu/aniwa mu grades hwehwɛ TML≤0.5%, CVCM≤0.01%); ɛsɛ sɛ wɔhwɛ sɛ ɔhyew a ɛko tia no yɛ nokware ma PTFE substrate (260°C) ne adhesive layer nyinaa; silicone PSA a wɔatew ho titiriw a ɛnyɛ mframa a ɛmma mframa nkɔ mu ho hia na wɔasiw siloxane efĩ ano; tumi a ɛkura ɔhyew a ɛkɔ soro no siw creep ne edge lifting ano; ahotew nhwehwɛ sɛ wɔhwie nhama a wɔde gu mu na ion a ɛwɔ mu no sua; anti-static tape (surface resistivity 106-109 Ω/sq) siw ESD a wɔsɛe no ano; ɛsɛ sɛ wɔsɔ plasma a ɛko tia no hwɛ ma sputtering/PECVD akwan horow no; thermal shrinkage a ɛba fam 2% hwɛ hu sɛ masking no yɛ pɛpɛɛpɛ.

Saa asɛm yi de organic solvents a PTFE ntama a ɛyɛ hyew kɛse tumi gyina ano no ba. PTFE-coated fiberglass ntama da nnuru soronko a ɛnyɛ adwuma adi, ɛkame ayɛ sɛ ɛko tia organic solvents a wɔtaa de di dwuma nyinaa wɔ adwumayɛ tebea a ɛfata mu a entumi nsɛe, ɛho ahonhon anaa nnuru a ɛyɛ adwuma. Nneɛma a wotumi gyina ano no bi ne: nsa (methanol, ethanol, isopropanol), ketones (acetone, MEK, cyclohexanone), esters (ethyl acetate, butyl acetate), hydrocarbons (petrol, toluene, xylene, hexane), hydrocarbons a halogen wom (dichloromethane, chloroform, carbon tetrachloride), ethers (diethyl ether, THF), organic acid (glacial acetic acid, formic acid), amines ne amides (triethylamine, DMF), phenols, ne afoforo te sɛ carbon disulfide, pyridine, silicone ngo ne breki nsu.

Saa asɛm yi ka onwini dodow a wɔhwehwɛ bere a PTFE ntama a ɛyɛ hyew kɛse sintering no ho asɛm. Sɛ wɔde sintering wɔ 380-400°C wie a, ɛsɛ sɛ ntama no fa ntɛmntɛm fa 310-315°C crystallization-sensitive beae no. Anyɛ yiye koraa no, onwini dodow a wɔkamfo kyerɛ ne 30-50°C/min (ntama a ɛyɛ tratraa betumi anya 100-200°C/min denam mframa a ɛma onwini so). Nnwini a ɛba ntɛmntɛm (dum) ma ahwehwɛ a ɛba fam (45-50%), ɛma nkataho a ɛyɛ mmerɛw na ɛyɛ den a ɛwɔ soro a ɛyɛ torotoro, ɛbata ho denneennen, ɛyɛ adwuma yiye a ɛnyɛ nea ɛbata ho, na ɛko tia delamination ne mpaapaemu. Onwini a ɛyɛ brɛoo (fononoo mu onwini) ma ahwehwɛ a ɛkɔ soro (60-70%), na ɛde nkataso a ɛyɛ den, ɛyɛ mmerɛw a ɛyɛ mmerɛw sɛ ɛbɛtwetwe, ayɛ peeling ne microcracks ba.

Saa asɛm yi de dan mu hyew ne ɔhyew a ɛkorɔn nyin a silicone nhyɛso-te nka adhesive ma PTFE tape toto ho. Ɔhyew a ɛkɔ soro a ɛnyin (120-180°C) ma nhama a ɛyɛ den a ɛwɔ crosslinked a ahoɔden a ɛyɛ den a ɛka bom yɛ adwuma, na esiw nkae a ɛbata ho bere a wɔapete awie no ano. Ɛnam primer co-curing so na ɛyɛ nnuru a ɛde anchoring bonds ne PTFE substrates, na eyi delamination asiane ahorow fi hɔ. Ɔhyew a ɛkɔ soro a ɛma ɛyɛ kɛse nso yi nneɛma a ɛyɛ hyew a ɛwɔ molecule a ɛba fam no fi hɔ ansa na wɔde ama, na esiw bubbling ne silicone ngo a ɛde efĩ ba bere a edi kan a wɔde hyew no no ano.