Pɛpɛɛpɛ Control of PTFE Coating Thickness wɔ Ntama Production

Sɛ́ obi a ɔyɛ adwumaden a ɔyɛ PTFE ntama a ɛyɛ hyew kɛse no, . Jiangsu Aokai New Materials ma wo nkyerɛkyerɛmu a ɛkɔ akyiri. Wɔ ɔkwan a wɔfa so de PTFE emulsion hyɛ glass fiber ntama (anaasɛ fiber felts/textiles a ɛte saa) mu no, nnyinasosɛm a ɛfa thickness control ho no te sɛ dip-coating kwan a wɔtaa fa so no. Ɔhaw titiriw no wɔ sɛnea nhama a ɛwɔ ase no yɛ porous na ɛnyɛ pɛpɛɛpɛ no. Enti, ade titiriw a ɛwɔ thickness control mu ne sɛ ɛbɛkari pɛ wɔ micro nsu absorption tumi ne macroscopic nhyehyɛe parameters ne pɛpɛɛpɛ a ɛkorɔn.

1. Emulsion Formula: Ɛkyerɛ sɛnea biribiara a wɔde kata so no mu duru bɛyɛ

Solid content ne viscosity : Fa low solid content dispersion (sɛ nhwɛso no 45%) yɛ tratraa a wɔde kata so wɔ bere biara mu na ɛtew asiane a ɛwɔ drying mpaapaemu so. Emulsion viscosity ne ade titiriw a ɛbɛma wɔasesa fluidity ne coating pickup dodow.

2. Impregnation Process: Mfiri a ɛkari pɛ a ɛyɛ nnam

Lifting / Squeezing speed : Ahoɔhare no na esi wet film thickness a ɛnam gravity ne viscous tumi a ɛkari pɛ so hyehyɛe no ho gyinae. Ahoɔhare a ɛkɔ soro no de emulsion pii kɔ na ɛyɛ sini a ɛyɛ nsu a ɛyɛ den.

Impregnation bere ne fiber pretreatment : Hwɛ hu sɛ nhama no ayɛ nsu koraa na akɔ mu. Ansa na wɔde nsuo bɛhyɛ mu no, ɛsɛ sɛ wɔhohoro burrs ne efĩ a ɛwɔ fiber no ani no ho yie na ama wɔatumi akata so pɛpɛɛpɛ na wɔanya ahoɔden a ɛkyɛn so.

Multi-pass coating ne post-treatment : Du botae a ɛyɛ den denam nkakrankakra a wobɛboaboa ano so. Eyi ne ɔkwan titiriw a wɔfa so du ne kɛse a wɔhwehwɛ no ho, a mpɛn pii no wodi kyinhyia a ɛne impregnation pii — drying — sintering akyi . Wɔhyɛ nyansa sɛ wɔbɛkamfo biako-twam a wɔde kata so no mu duru so wɔ 0.01mm ~ 0.08mm mu.

·  Drying : 100 ~ 150°C na yi nsuo koraa.

·  Baking : 280 ~ 290 ° C de yi surfactants fi hɔ. Sɛ wɔma ɛyow na wɔtow no pɛpɛɛpɛ a, ɛbɛma mpaapaemu, ahurututu anaa pinholes aba ade a wɔde kata so no so.

·  Sintering : 360 ~ 390 ° C, kura mu 30 ~ 90 sikani. Sintering ho hia kɛse ma coating forming. Ɔhyew a ɛba fam dodo ma ɛnyɛ nea ɛkata ade ne nhama ntam; ɔhyew a ɛkɔ soro dodo betumi ama resin asɛe.

3. Nneɛma a Atwa Yɛn Ho Ahyia: Nneɛma a ɛho nhia a ɛwɔ nkɛntɛnso

Nsuo a ɛyɛ nwini : Ɛsɛ sɛ wɔhwɛ nsuo a atwa yɛn ho ahyia no so denneennen wɔ 40%–60% RH . Nsu a ɛyɛ nwini a ɛba fam dodo bɛma ne honam ani ayɛ mmerɛw na ɛrenkɔ mu sɛnea ɛsɛ; ɔhyew a ɛkɔ soro dodo betumi ama ayɛ mmerɛw, pinholes ne adhesion so atew.

Adwumayɛbea ahotew : Hwɛ adwumayɛbea ahotew so yiye na amma nneɛma nketenkete a ɛwɔ mframa mu no antɔ nsu a wɔde gu nsu mu no mu anaasɛ ankɔbata sini a ɛyɛ nsu a ɛnyow no ho, na ɛno bɛma nneɛma a ɛwɔ soro no asɛe.

4. Nyansahyɛ ahorow a mfaso wɔ so & Quality Closed-Loop Control

Production akwankyerɛ : Wɔhyɛ nyansa sɛ fa ɔkwan a ɛne sɛ low concentration + multiple impregnation passes no nni dwuma  pɛpɛɛpɛ na wɔadi coating nyinaa thickness so pɛpɛɛpɛ denam impregnation mmere a wɔbɛsesa so. Saa bere yi nyinaa, hyehyɛ akwan a wɔfa so di dwuma ansa na wɔayɛ aduru ne nea wɔyɛ wɔ ayaresa akyi, a ɛyɛ fapem a wɔde kata ade a ɛkorɔn so.

Ɔhaw ahorow : Sɛ coating mu mpaapaemu ba wɔ sintering akyi a, hwɛ sɛ single-pass coating no yɛ den dodo anaasɛ drying ahoɔhare yɛ ntɛmntɛm dodo; sɛ coating adhesion nnɔɔso a, hwɛ fiber no ani ho tew ne sɛnea sintering hyew ne bere a wɔde kura mu.

Quality closed-loop nhyehyɛe : Fa adeyɛ ntease a edi mũ si hɔ:  Adeyɛ parameter control → On-line real-time monitoring → Finished product statistical analysis → Process optimization feedback .
PTFE impregnation yɛ physicochemical adeyɛ a ɛyɛ den a ɛwɔ multi-variable coupling. Stable thickness pɛpɛɛpɛyɛ betumi anya nkutoo denam standardized control nhyehyɛe a wɔbɛkyekyere emulsion formula, process parameters ne nneɛma a atwa yɛn ho ahyia tebea horow, ne matched sɔhwɛ akwan.

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