Saa mfiridwuma ho nsɛm tiawa a efi Jiangsu Aokai hɔ yi hwehwɛ sɛnea sintering hyew a ɛba fam anaasɛ ɛkɔ soro dodo sɛe PTFE ntama a ɛyɛ hyew kɛse no mu. Sintering a ɛba fam no ma nneɛma nketenkete no ntumi nsɛe, na ɛde micro-pores, coating-substrate bonding a ɛyɛ mmerɛw, nneɛma a ɛyɛ mmerɛw, mfiri ahoɔden a enye, ne nufusu a ɛnyɛ nea ɛda adi. Ɔhyew a ɛboro so ma PTFE hyew sɛe, na ɛma pinholes, bubbles, brittleness, kɔla sesa kɔkɔɔ kɔ tuntum, na ɛma wusiw a awuduru wom fi mu ba. Nneɛma abien no nyinaa a ɛtra so sɛe compactness, non-stick adwumayɛ, flexibility, insulation, ne dimensional stability.

PTFE ntama a ɛyɛ hyew kɛse a ɛbɔ ho ban gaskets ka dielectric ahoɔden a ɛkorɔn (egyina hɔ pintinn wɔ nsu a ɛyɛ nwini ase), -70°C kosi 260°C ɔhyew a ɛkɔ soro, amansan nnuru a ɛko tia (gye alkali dade a wɔabɔ), a ɛnyɛ nea ɛbata soro (siw creepage ano), anti-creep (fiberglass reinforcement vs. pure PTFE), ahoɔden a ɛkorɔn a ɛtwetwe, friction a ɛba fam bom (μ=0.05-0.1), ne V-0 ogyaframa dodow. Sɛ wɔde toto mica, rɔba, ne PTFE gaskets a ɛho tew ho a, PTFE ntama ma wotumi yɛ nsakrae a ɛkorɔn, wotumi yɛ ho adwuma, na ɛma ɛyɛ den bere tenten. Ɛyɛ papa ma transformers, motor insulation, nnuru flange sealing, ne semiconductor mfiri.

PTFE ntama a ɛyɛ tratraa bere a wɔreyɛ sintering no hwehwɛ sɛ wɔhyɛ nhyɛso, ɔhyew, ne anohyeto so pɛpɛɛpɛ. Akwan titiriw: stenter afiri (pin mprɛte hwɛ ntrɛwmu so, siw weft shrinkage ano), gradient temperature profile (ɔhyew a ɛyɛ brɛoo → 380-400°C kura → onwini a ɛyɛ brɛoo wɔ 310°C ase ansa na wɔayi nhyɛso), substrate a wɔadi kan atwitwa (yi nwene nhyɛso ansa na wɔde akata so), ne ade a wɔde kata so no mu duru a ɛyɛ pɛ (ɛsiw nsonsonoe a ɛbɛbɔ ano). Ɛsɛ sɛ wɔhwɛ stenter anohyeto so kosi sɛ ɛbɛyɛ nwini wɔ PTFE crystallization point (bɛyɛ 310°C) ase na amma ɔko no ankɔ.

Coating uniformity bere a PTFE emulsion impregnation fiberglass ntama ne nkwa kwan a product su. Nneɛma a wɔde kata so a ɛnyɛ pɛpɛɛpɛ de ba: nea entumi nkɔ so (ɛbata mmeae a ɛyɛ tratraa), mfiridwuma mu mmerɛwyɛ (adwennwen a ɛwɔ mu, ɛtetew), anyinam ahoɔden a entumi nnyina (breakdown voltage kɔ fam kodu 1/10), nnuru a ɛkɔ mu (pinhole corrosion), dimensional issues (warpage), ne processing sintɔ (belt wandering, thickness variation). Uniform coating hwehwɛ sɛ wɔhwɛ emulsion viscosity, solid content, ntama tension, squeeze gaps, ne multi-zone drying / sintering profiles so pɛpɛɛpɛ.

PTFE ntama a ɛyɛ hyew kɛse no fa nhyehyɛe mu nsakrae anan mu bere a ɔhyew kɔ soro no: ɛba fam 260°C – micro-cracking brɛoo ne residual additive volatilization; wɔ 327°C (melting point) – ahwehwɛ-kɔ-amorphous nsakrae, ade a wɔde kata so no yɛ mmerɛw, delaminates fi fiberglass; 400-500°C – PTFE depolymerizes (yi mframa a awuduru wom fi mu), ade a wɔde kata so no yera; ɛboro 500°C – fiberglass yɛ mmerɛw (840°C softening point) na ɛhwere nhyehyɛe no mudi mu kura. Tra ase 260°C kɔ so, kwati >300°C peaks na ama woayɛ adwuma a ahobammɔ wom.

PTFE ntama a ɛyɛ hyew kɛse no nam so yɛ biako-dip impregnation (baako twa: ntɛmntɛm, ɛho ka sua, teateaa coating, rough surface with pinholes) anaasɛ multi-dip impregnation (2-3 + twa: torotoro, dense, pinhole-free coating, PTFE content 50-70%, premium adwumayɛ, ɛho ka a ɛkorɔn). Single-dip fata gaskets a ɛba fam, bere tiaa mu mats, ne nneɛma a ɛma ahome. Multi-dip ho hia ma aduan-grade baking sheets, non-stick conveyor belts, high-frequency circuit substrates, nnuru liners, ne adansi membranes.

PTFE a ɛkorɔn-ɔhyew ntama ani ayaresa bubu nnuru inertness ma bonding / tintim. Akwan anan: nnuru etching (sodium-naphthalene, soro ahoɔden 20→40-50 dyn / cm, daa esum layer, micro-porous nhyehyɛe), plasma ayaresa (nano-roughening, dwumadi kuw grafting, tiawa active window), corona ayaresa (thin-film, ntɛmntɛm porɔw, anohyeto bun), ne laser ayaresa (precision micro-patterning, controlled carbonization). Akwan nyinaa honam fam roughen na nnuru de polar akuw (C=O, -OH, -COOH) ba na ama adhesive bonding atumi.

Raw material ahotew ne fapem titiriw a ɛma PTFE ntama a ɛyɛ hyew kɛse no yɛ papa. Efĩ (residual initiators, surfactants, metal ions, sizing agents a efĩ wom) ma ɔhyew sɛe ntɛm (bubbles, blistering above 260°C), a ɛnyɛ pɛpɛɛpɛ a ɛnyɛ nea ɛbata so (adhesion anchor points), anyinam ahoɔden a wɔde siw ano a ɛso tew (dielectric loss, lower breakdown voltage), mfiri ahoɔden a ɛyɛ mmerɛw (stress concentration, cracking), ne kɔla a ɛyɛ kɔkɔɔ/kɔla a ɛsakra. Nneɛma a wɔde yɛ nneɛma a ɛho tew kɛse hwɛ hu sɛ PTFE ntama a ɛne FDA hyia, ɛtra hɔ kyɛ, ɛyɛ adwuma yiye.

PTFE-coated fiberglass ntama sintering hwehwɛ bere pɔtee a wɔde kura mu wɔ 370-400°C. Fononoo a ɛkɔ so: 30-90s (tenten) kosi 3-5+ min (a ɛyɛ den). Fononoo a wɔde yɛ batch: simma 5-15. Under-sintering ma opaque, rough coatings a ɛpopae; sɛ wɔma ɛyɛ hyew boro so a, ɛma ɛyɛ kɔkɔɔ, ɛyɛ mmerɛw, na ɛma fluoride mframa a awuduru wom fi mu. Adeyɛ a wɔyɛ no yiye: fa fononoo mu hyew trackers di dwuma, yɛ nhwehwɛmu a wɔde aniwa hu (semi-transparent, flexible), na yɛ teyp twetwe sɔhwɛ ahorow. Bere nyinaa hwɛ hu sɛ ɔhyew a ne kɛse nyinaa yɛ pɛ.

PTFE ntama a ɛyɛ hyew kɛse hwehwɛ sɛ wɔde ahwɛyiye di ho dwuma na ama wɔahwɛ ahu sɛ ahobammɔ ne nkwa tenten. Ahwɛyiye atitiriw: ntra 260°C da (ɛboro 320°C ma wusiw a awuduru wom fi mu), kwati sɛ ɛbɛbɔ akuturuku a ano yɛ nnam (ɛpaapae ade a wɔde kata so, ɛma fiberglass da adi), nsiesie abrasive biara nni hɔ (dade aboa nhoma sɛe baabi a ɛnyɛ den), sie baabi a ɛhɔ yɛ hyew a ɛtrɛw (ɛmma ɛntetew), na fa foforo si ananmu bere a ɛyɛ akisikuru anaasɛ ɛho ayɛ kurukuruwa no. Store rolled, akyirikyiri fi UV. Hyɛ nsateaa a ɛmma ɔhyew nkɔ mu bere a woredi ho dwuma no.