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.

Saa akwankyerɛ yi ka PTFE teapɔn a ɛyɛ hyew a ɛkorɔn a wɔpaw ma injection molding demolding ne anti-stick applications ho. Ɔhyew a egyina paw so: ≤260°C ma plastic ahorow a wɔde di dwuma wɔ ɔkwan a ɛkɔ akyiri so (silicone PSA teyp a ɛyɛ gyinapɛn, 0.13-0.18mm); 260-300°C ma mfiridwuma mu plastic a ɛyɛ hyew te sɛ PC, PA66, POM (silicone adhesive a ɛyɛ hyew kɛse, 0.18-0.25mm); 300-400°C ma PEEK, LCP, PPS a ɛbɛn mmirikatufo a wɔyɛ hyew (adhesive tape di nkogu; fa PTFE ntama a adhesive nnim anaa PFA film di dwuma). Nneɛma a egyina paw: tacky nneɛma hia high-release pure PTFE surfaces; ahwehwɛ / mineral ahyɛ nneɛma ma hwehwɛ heavy-duty 0.25mm + wear-resistant tape; nneɛma a wɔde ka ho a ɛporɔw hwehwɛ ade a wɔde nkata so a nnuru ntumi nkɔ mu ne substrate a ɛyɛ den; static-sensitive applications hia anti-static tuntum PTFE teapɔn.

Wɔnam PTFE a ɛtwetwe ntama a ɛyɛ hyew kɛse so na ɛyɛ denam PTFE a wɔde kata fiberglass ntama a ahoɔden kɛse wom so, na ɛma ahoɔden a ɛtwetwe, ɔhyew a ɛko tia, nea ɛnkyere so, nnuru a ɛko tia, ne friction a ɛba fam. Nneɛma atitiriw a wɔde di dwuma ne: mfiridwuma mu nneɛma a wɔde fa nneɛma mu (ɔhyew a wɔde kyekyere nneɛma, aduan a wɔde to, ntama a wɔde dry, krataa/film a wɔde hyɛ); composite molding release ntama ne ɔhyew press cushion liners; welding ntama a ɛbɔ ho ban ne jackets a wɔde siw ɔhyew ano; anyinam ahoɔden motor ne transformer insulation; bearing ahorow a ɛtwetwe ne nea wɔde gyina nsu afiri mu; nnuru a wɔde yiyi mu ne valve a wɔde siw ano wɔ mmeae a asɛe. Ahoɔden a ɛkorɔn a ɛtwetwe no hwɛ hu sɛ ɛbɛtra hɔ akyɛ wɔ nhyɛso, tetew, flexing mpɛn pii, ne ɔhyew a ɛkorɔn mfiridwuma mu nhyɛso wɔ saa dwumadie ahodoɔ a emu yɛ duru yi mu.

Wɔ sintering mu no, PTFE asinasin a ɛwɔ fiberglass ntama so no nwene boro 327°C, na ɛsɛe mfitiase folded-chain lamellae ne nneɛma nketenkete ahye ma ɛyɛ amorphous melt. Sɛ ɛyɛ nwini a, PTFE san yɛ ahwehwɛ a ɛyɛ spherulites a ɛyɛ radially oriented lamellae, a crystallinity yɛ 50–70%. Onwini dodow na ɛkyerɛ sɛnea ahwehwɛ no yɛ pɛ: onwini a ɛyɛ brɛoo no ma ahwehwɛ a ɛkorɔn, spherulites akɛse, ɛyɛ den kɛse; sɛ wodum ntɛmntɛm a, ɛma spherulites a ɛyɛ fɛ na ɛma wotumi yɛ nsakrae yiye.

Wɔde fiberglass ntama a wɔde PTFE akata so di dwuma kɛse wɔ rɔba a wɔde yɛ adwuma mu esiane sɛ ɛko tia ɔhyew, ɛnyɛ nea ɛbata ho, na ɛnyɛ den pii nti. Nneɛma atitiriw a wɔde di dwuma ne: release liners a wɔde yɛ plate/vacuum vulcanization ne tae molding; conveyor belts a ɛnyɛ nea ɛbata ho a wɔde yɛ owiyammo a wɔabue, kalenda, ne nhama a ɛma onwini; ntama a wɔde hyɛ mu ma wɔde rɔba a wɔawie fã bi sie; silicone ne fluoroubber a wɔde di dwuma titiriw; ne fononoo trays a wɔde yɛ post-curing. Mfaso a ɛwɔ so no bi ne sɛ wobeyi nkuku a ɛbata ho no afi hɔ, wɔbɛtew nnuru a wɔde gyae nneɛma a wɔde di dwuma so, wɔasiw roller wrapping ano, na wɔhwɛ hu sɛ wɔbɛpopa nkuku no yiye.

Sintering a ɛba fam no ma PTFE ntumi nsɛe, na ɛde micro-pores, adhesion a enye, n’afã a ɛyɛ mmerɛw, mfiri ahoɔden a ɛba fam, ne nufusu hwɛbea ba. Ɔhyew a ɛboro so no sɛe PTFE, na ɛma pinholes, bubbles, brittleness, kɔla kɔkɔɔ kosi tuntum, ne wusiw a awuduru wom ba. Wɔn baanu nyinaa sɛe compactness, non-stick adwumayɛ, flexibility, insulation, ne dimensional stability. Nea eye sen biara 370–400°C ma wonya semi-transparent, smooth, tan coating. Aniwa so nhwehwɛmu: matte fitaa = under-sintered; yellow/brittle = nea wɔayɛ no boro so. (nkyerɛwde 296) .