Chemical Corrosion Resistance of PTFE High-Temperature Fabric – Nea Ɛgyina ano Ne Nea Ɛntumi Ngyina

Wɔ nnuruyɛbea ahorow, nhama a wɔde anyinam ahoɔden hyɛ mu, ne semiconductor fabs mu no, nnwinnade a wɔde kata so ne nea wɔde fa nneɛma so hyia ntua bere nyinaa fi nnuru a ano yɛ den mu. PTFE ntama a ɛyɛ hyew kɛse (fiberglass ntama a wɔde polytetrafluoroethylene akata so) no mu pɛpɛɛpɛ esiane nnuru a ɛnyɛ adwuma soronko nti. Wɔtaa ka Nanso 'ɛkame ayɛ sɛ amansan' ahoɔden a ɛko tia no nyɛ 'amansan de' – nneɛma kakraa bi a ɛyɛ basabasa betumi atow ahyɛ so, na ɔhyew di dwuma titiriw.

Aokai PTFE asɔ PTFE ntama ahwɛ wɔ nnuru ɔhaha pii ho. Saa akwankyerɛ yi kyerɛkyerɛ nea ɛko tia, nea ɛsɛ sɛ wɔkwati, ne sɛnea ɔhyew ka adwumayɛ mu.

Adwumayɛ ho nsɛm nyinaa – Nnuru a Ɛbɛn Amansan Nnuru a Ɛnyɛ Adwuma

PTFE ntama a ɛyɛ hyew kɛse hoahoa ne ho sɛ ɛyɛ soronko a ɛda nsow a ɛko tia nnuru a ɛporɔw, na ɛka mfiridwuma mu nneɛma a wɔtaa de di dwuma no mu. Saa su titiriw yi fi akyi polytetrafluoroethylene a wɔde kata so, a ɛyɛ carbon-fluorine (CF) nkitahodi a emu yɛ den a ɛko tia nnuru ntua no.

Fiberglass substrate a ɛwɔ aseɛ no nyɛ nnuru a ɛnyɛ adwuma – nanso berɛ dodoɔ a PTFE a wɔde akata so no kɔ so yɛ adwuma no, ntama no yɛ adwuma sɛ adeɛ a ɛkame ayɛ sɛ ɛnyɛ adwuma. Wɔ ɔhyew a wɔde yɛ adwuma daa mu no, PTFE ntama kɔ so gyina hɔ pintinn kɛse wɔ acid a ano yɛ den, alkali a ano yɛ den, nnuru a ɛma nneɛma yɛ hyew, ne nneɛma a ɛma oxidizing dodow no ara ho.

Wide Range of Resistant Media – Nea PTFE Ntama betumi adi ho dwuma

Wɔ ɔhyew a wɔde yɛ adwuma daa mu no, ade no kɔ so gyina hɔ pintinn kɛse wɔ acid a ano yɛ den, alkalis a ano yɛ den, nneɛma a wɔde yɛ nneɛma a nkwa wom, ne nneɛma a ɛma oxidizing dodow no ara ho.

1. Acid a ano yɛ den

Sulfuric acid a wɔahyɛ no den, nitric acid, hydrochloric acid, phosphoric acid, ne aqua regia (nitric ne hydrochloric acid a wɔde afra a ɛma sika kɔkɔɔ tew) – PTFE gyina ne nyinaa ano. Ɔsɛe biara a wobetumi asusuw no mma.

2. Alkali a ɛyɛ den

Sodium hydroxide (NaOH) ne potassium hydroxide (KOH) aduru nni nkɛntɛnso bɔne biara wɔ dan mu hyew mu. Nneɛma a ɛko tia no trɛw kɔ mmeae dodow no ara a alkaline wɔ.

3. Nneɛma a wɔde yɛ nnuru a wɔmfa nnuru nni dwuma wom

PTFE ntumi nkɔ nnuru a wonim no nyinaa mu. Ɛrenhohoro anaasɛ ɛrensɛe bere a ɛde ne ho ahyɛ ketones, nsa, ethers, hydrocarbons, chlorinated solvents, anaa aduru foforo biara mu no.

4. Nneɛma a ɛma oxygen yɛ hyew

Ɛda abodwokyɛre a ɛkyɛn so adi wɔ oxidizers a ano yɛ den te sɛ hydrogen peroxide (H2O2) ne permanganates ho.

5. Agyapade afoforo

• Hydrolysis-resistant – nsuo anaa nsuo a ɛyɛ hyew nnya so nkɛntɛnsoɔ

• Wim tebea a ɛko tia – UV ne abɔnten a wɔde hyɛ mu no ma nneɛma sɛe kakraa bi

• Oil-repellent ne non-stick – ahoɔden a ɛba fam wɔ soro no siw adhesion ano

• Nsuo a wɔtwetwe – wɔ ɔkwan a etu mpɔn so no yɛ zero (<0.01%) .

Nea ɛka ho – Nnuru a Ɛsɛ sɛ Yɛhwɛ Yiye Wɔ Ho

PTFE nyɛ nea ɛko tia wɔ amansan nyinaa mu. Ɛne nnuru kakraa bi a ɛyɛ adwuma kɛse yɛ adwuma wɔ tebea horow a emu yɛ den mu, na ɛhwehwɛ sɛ wɔde adwene si so titiriw bere a wɔrepaw nneɛma no.

Aokai PTFE si so dua sɛ saa nneɛma a wɔayi afi mu yi ho yɛ na nanso ɛho hia sɛ wuhu:

H3: Alkali dadeɛ a ayɛ nwini

Sodium (Na), potassium (K), ne lithium (Li) a ayɛ nwini no bubu carbon-fluorine nkitahodi a ɛwɔ PTFE mu no mu, na ɛde ɔsɛe koraa ba. Eyi ne nnyinasosɛm a ɛwɔ sodium-naphthalene etching akyi ma PTFE soro ayaresa.

H3: Halogen nnuru a ɛyɛ adwuma kɛse wɔ ɔhyew a ɛkɔ soro ne nhyɛso a ɛkɔ soro ase

• Chlorine trifluoride (ClF3) a ɛwɔ nipadua no mu.

• Oxygen difluoride (OF2) a ɛwɔ nipadua no mu.

• Fluorine gas (F2) wɔ ɔhyew ne nhyɛso a ɛkɔ soro mu

Eyinom betumi ne PTFE ayɛ wɔn ade anaasɛ wɔahyew mpo wɔ tebea horow a emu yɛ den mu.

H3: Nwene alkali a ɛyɛ den wɔ ɔhyew a ɛkɔ soro mu

Sodium hydroxide (NaOH) anaa potassium hydroxide (KOH) a wɔanwene a ɛboro bɛyɛ 300°C no sɛe PTFE nkakrankakra. Wɔ dan mu hyew mu no, enni nkɛntɛnso biara.

H3: Nkaeɛ a ɛho hia – coating damage ma fiberglass da adi

Atifi hɔ anohyeto ahorow no fa PTFE a wɔde kata so no nkutoo ho. Sɛ ade a wɔde kata so no ayɛ mmerɛw, asɛe, anaasɛ ɛwɔ pinholes a, fiberglass substrate a ɛwɔ ase no bɛda adi. Fiberglass ntumi nnyina:

• Hydrofluoric acid (HF) – ɛma ahwehwɛ nhama no tew ntɛmntɛm

• Alkali a ɛyɛ hyew a wɔahyɛ no den – tow hyɛ ahwehwɛ so

Eyi nti na ade a wɔde kata so no mudi mu kura a wɔbɛkɔ so akura mu no ho hia kɛse ma nnuruyɛ adwuma no. Wɔ application ahorow a ɛfa HF ho no, susuw PTFE sini a ɛho tew ho mmom.

Nkɛntɛnso a Ɔhyew Nya wɔ Nnuru a Ɛko Tia So

Ɔhyew yɛ adwuma sɛ ade titiriw a ɛkyerɛ nnuru a ɛko tia. Wɔ ne bere tenten som hyew dodow (a mpɛn pii no -70°C kosi 260°C) mu no, ɛkame ayɛ sɛ PTFE nnuru a ɛgyina pintinn no nnya nkɛntɛnso biara.

Nanso, ɔhyew a ɛkɔ so boro 260°C no bɛma:

• Nkakrankakra tew PTFE nnuru a ɛnyɛ adwuma no so

• Ma nneɛma no nyɛ nea nneɛma a ɛtra so a yɛaka ho asɛm wɔ atifi hɔ no betumi asɛe

• Ma ɔhyew a ɛsɛe ade ntɛmntɛm, na ɛma mmerɛwyɛ ahorow ba baabi a nnuru ntua betumi afi ase

Aokai PTFE sɔhwɛ data: Wɔ 250°C a ɛkɔ so de di dwuma mu no, PTFE ntama no kura ne nnuru a ɛko tia no >90% wɔ nnafua 200 akyi. Sɛ ɛyɛ 280°C a, adwumayɛ so tew kɛse wɔ adapɛn kakraa bi mu.

Sɛ wopɛ dwumadie a ɛwɔ ɔhyew a ɛkɔ soro (>260°C) ne nnuru a ɛwɔ mu nyinaa a, hwɛ mfiridwuma ho nsɛm anaa yɛ dwumadie pɔtee ho sɔhwɛ.

Nsɛm a Wɔaboaboa Ano – Bere a Ɛsɛ sɛ Wopaw PTFE Ntama ma Nnuru a Atwa Yɛn Ho Ahyia

Aokai PTFE de ntama a wɔde PTFE akata so ma mmeae a nnuru a atwa yɛn ho ahyia a ɛyɛ den. Wɔ dwumadie a ɛhia sɛ wɔko tia HF anaa nnuru a ɛyɛ nokware kɛseɛ no, yɛhyɛ nyansa sɛ wɔnsɔ nhwɛ wɔ adwumayɛ tebea ankasa mu anaasɛ wɔmfa PTFE sini grades a ɛho tew nni dwuma. Di yɛn ho nkɔmmɔ na fa wo nnuru pɔtee, ɔhyew, ne bere a wode di dwuma no di nkitaho na woanya nyansahyɛ bi.

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