Ndi Mankhwala Ati Angawononge Nsalu Ya PTFE Yotentha Kwambiri?

PTFE ndi yotchuka chifukwa cha kusagwira bwino kwa mankhwala - nthawi zambiri amatchedwa 'King of Plastics.' Imatsutsa pafupifupi ma asidi onse, alkalis, ndi zosungunulira kutentha. Komabe, 'pafupifupi zonse' si 'zonse.' Pazifukwa zovuta kwambiri - kutentha kwambiri, kusungunuka kwambiri, kapena kusungunuka - mankhwala ena amatha kuwononga PTFE. Ndipo ngakhale PTFE ikapulumuka, gawo lapansi la fiberglass litha kukhala pachiwopsezo ngati zokutira zili ndi zolakwika.

Kumvetsetsa zolephera izi ndikofunikira pakusankha nsalu za PTFE m'malo ovuta kwambiri.

Aokai PTFE yayesa nsalu zokutira PTFE motsutsana ndi mankhwala aukali. Bukuli likufotokoza zomwe zimawononga PTFE mwachindunji, zomwe zimawononga gawo lapansi la fiberglass, ndi momwe mungapewere zolephera.

Momwe Corrosion Imachitikira - Njira ziwiri

Nsalu ya PTFE yotentha kwambiri imakhala ndi magawo awiri: chophimba cha PTFE (chochepa, chosamangirira, chopanga mankhwala) ndi gawo lapansi la fiberglass (limapereka mphamvu koma limakhala pachiwopsezo cha mankhwala ena). Kuwonongeka kumachitika m'njira ziwiri:

1. Kukokoloka kwachindunji kwa zokutira za PTFE

Izi zimachitika pokhapokha pamikhalidwe yovuta kwambiri - kutentha kwakukulu, kusungunuka kwakukulu, kapena kusungunuka. Pa kutentha kwa chipinda, PTFE imakhala yotetezedwa kuti iwononge mankhwala.

2. Kuwonongeka kwa gawo lapansi la fiberglass kudzera muzopindika zokutira

Mankhwala amalowa m'miyendo, zokanda, kapena ming'alu yaying'ono mu zokutira za PTFE ndikuukira ulusi wagalasi. PTFE yokha ikhoza kuwoneka bwino, koma nsaluyo imataya mphamvu zamakina ndipo imatha kung'ambika mosavuta. Iyi ndi njira yolephereka wamba pamene zokutira zawonongeka.

Mankhwala Omwe Amawukira Mwachindunji PTFE Coating

Zinthu izi zimachita ndi PTFE yokha, koma pokhapokha pakakhala zovuta kwambiri.

1. Zitsulo zosungunuka za alkali - zodziwika kwambiri

Sodium yosungunuka (Na), potaziyamu (K), ndi lithiamu (Li) imachotsa maatomu a fluorine kuchokera ku PTFE, kuchititsa carbonization, black discoloration, and powdering of the material surface. Njira ya sodium-naphthalene yomwe imagwiritsidwa ntchito pa PTFE etching imagwira ntchito pa mfundo iyi.

• Zotsatira: Kuwononga kwathunthu kwa PTFE kapangidwe.

• Zoyenera: Kukhudzana kulikonse ndi zitsulo zosungunuka za alkali (pamwamba pa malo osungunuka, mwachitsanzo, Na pa 98°C).

• Malangizo: Pewani kwathunthu. Gwiritsani ntchito filimu yoyera ya PTFE pokhapokha ngati kuli kofunikira, ndipo ngakhale mosamala.

2. Mphamvu za fluorinating pa kutentha kwakukulu

Zinthu izi zimatha kuwolanso PTFE pa kutentha kwakukulu:

• Mpweya wa fluorine (F₂): Umapangitsa dzimbiri pang'onopang'ono pa kutentha kwambiri komanso kupanikizika.

• Interhalogen fluorides: Mankhwala osokoneza bongo kwambiri monga chlorine trifluoride (ClF₃) ndi bromine pentafluoride (BrF₅) angayambitse kukhudzidwa kwakukulu kapena kuyaka kwa PTFE pa kutentha kwakukulu.

• Ma fluoride amphamvu oxidizing: Mwachitsanzo, xenon difluoride (XeF₂).

Malangizo: Sungani nsalu za PTFE kutali ndi mankhwalawa, makamaka pa kutentha kokwera.

3. Ma alkali amphamvu amasungunuka pa kutentha kwambiri

Sodium hydroxide (NaOH) yosungunuka ndi potaziyamu hydroxide (KOH) imawononga pang'onopang'ono PTFE pamwamba pa 300 ° C, zomwe zimapangitsa kuti hydrophobicity ndi gloss iwonongeke. Pansi pa 300 ° C, PTFE imatsutsa bwino alkalis. Pa kutentha kwa chipinda, palibe zotsatira.

4. Zowonongeka zazitsulo zazitsulo pa kutentha kwakukulu

Magnesium ufa (Mg), aluminiyamu ufa (Al), ndi zipangizo zofanana zimagwira mwamphamvu ndi PTFE pa kutentha kwakukulu, kupanga zitsulo za fluoride ndi carbon. Awa ndiye maziko a nyimbo za pyrotechnic ndi incendiary zomwe zili ndi PTFE.

Mankhwala Omwe Amayambitsa Fiberglass Substrate Kupyolera mu Zowonongeka Zopaka

Mankhwalawa samachita ndi PTFE, koma ngati zokutira za PTFE zili ndi nsonga, zokanda, kapena m'mphepete, zimalowa ndikuwononga fiberglass.

1. Hydrofluoric acid (HF) - yoopsa kwambiri

Hydrofluoric acid imawononga kwambiri fiberglass. Imachita mwachangu ndi silicon dioxide (gawo lalikulu lagalasi) kupanga mpweya wa silicon tetrafluoride, kusungunula ulusi wagalasi.

• PTFE yokha imatsutsa HF mwangwiro - PTFE imagwiritsidwa ntchito pazida zogwirira ntchito za HF.

• Komabe, PTFE- TACHIMATA nsalu SI otetezeka kwa HF pokhapokha zokutira ali mwamtheradi pinhole-free (komwe ndi kovuta kwambiri kutsimikizira). Chilema chilichonse chimalola HF kuti ilowe mu fiberglass, ndikupangitsa kulephera kwansalu mwachangu.

• Malangizo: Pantchito ya HF, gwiritsani ntchito filimu yoyera ya PTFE (yopanda fiberglass reinforcement) kapena liner ya PTFE yokhala ndi mapini otsimikizika aziro.

2. Ma alkali okhazikika pa kutentha kwambiri

Kutentha kwambiri kwa sodium hydroxide (NaOH) kumatha kuwononga magalasi a fiberglass chifukwa cha ❖ kuyanika. Kutentha kwachipinda, kusungunuka kwa alkali ndi kotetezeka.

3. Phosphoric acid wokhazikika pa kutentha kwambiri

Kulumikizana kwanthawi yayitali ndi asidi wa phosphoric wotentha kumayambitsa dzimbiri ku fiberglass. Apanso, PTFE palokha imakana, koma zopindika zokutira ndizofooka.

Zikumbutso Zofunika za Chemical Service

1. Zolephera zambiri zimakhala chifukwa cha kuvala kwa makina kapena ukalamba wotentha, osati kuukira kwa mankhwala

M'mafakitale omwe amagwiritsa ntchito (zomera zamakina, kukonza chakudya, ndi zina zambiri), nsalu ya PTFE imalephera chifukwa cha abrasion, kung'ambika, kapena kuwonongeka kwa kutentha nthawi yayitali isanayambe dzimbiri. The chemical inertness ya PTFE ndi yeniyeni komanso yodalirika pafupifupi mankhwala onse wamba mpaka 260°C.

2. Ngati muyenera kuthana ndi mankhwala aukali, ntchito koyera PTFE filimu

Pogwiritsa ntchito zitsulo zosungunuka za alkali, HF yotentha kwambiri, kapena ma fluorinating amphamvu, galasi la fiberglass la PTFE ndilosavomerezeka . M'malo mwake, gwiritsani ntchito:

• Filimu yoyera ya PTFE (yopukutira kapena kuponyedwa) yopanda fiberglass kulimbitsa

• zazitsulo zokhala ndi PTFE Zida

• PFA kapena FEP (ma fluoropolymer ena omwe ali ndi kukana kofanana koma makina osiyanasiyana)

3. Yesani nthawi zonse musanagwiritse ntchito mokwanira

Ngati kugwiritsa ntchito kwanu kukukhudza mankhwala omwe sanatchulidwe kuti 'otetezeka' m'matchati ofananira, yesani kuyenderana ndi zinthu m'mikhalidwe yeniyeni yogwirira ntchito (kutentha, kukhazikika, nthawi). Aokai PTFE ikhoza kupereka zitsanzo zoyesera kuti zitsimikizidwe.

Chidule - Chemical Compatibility Quick Reference

Aokai PTFE imapereka chitsogozo chogwirizana ndi mankhwala ndipo imatha kupangira chinthu choyenera - PTFE-nsalu yokutidwa ndi ntchito zambiri, kapena filimu yoyera ya PTFE yogwiritsira ntchito mankhwala osokoneza bongo. Lumikizanani nafe ndi mankhwala anu enieni, kutentha, ndi nthawi yowonekera.

Zomwe zili pamwambazi zimaperekedwa ndi Malingaliro a kampani Jiangsu Aokai New Materials Technology Co., Ltd.

Ngati mukufuna kudziwa zambiri zatsatanetsatane, mawonekedwe ogwiritsira ntchito ndi mayankho makonda pazogulitsa zathu zonse, kuphatikiza nsalu zotentha kwambiri za PTFE, matepi apamwamba kwambiri a PTFE, malamba a mesh a PTFE, malamba omangira makina opanda msoko, nsalu imodzi ya PTFE, nsalu zotchinga kutentha kwambiri, ndi malamba osagwira magalasi apamwamba, chonde malamba osamva magalasi apamwamba

• Bambo Guo: +86 18944819998

• Bambo Liu: + 86 13705266308

Nthawi zonse timatsatira malingaliro a ukatswiri ndi kukhulupirika, ndipo tadzipereka kukupatsirani mayankho amodzi ndi ntchito zoganizira.