PTFE (polytetrafluoroethylene)ndi polyester (monga PET, PBT, ndi zina zotero) ndi zinthu ziwiri zosiyana kwambiri za polima. Zili ndi kusiyana kwakukulu mu kapangidwe ka mankhwala, makhalidwe a ntchito, ndi malo ogwiritsira ntchito. Izi ndi kufananiza mwatsatanetsatane:
1. Kapangidwe ka mankhwala ndi kapangidwe kake
PTFE (polytetrafluoroethylene)
●Kapangidwe: Kapangidwe kake kamakhala ndi unyolo wa atomu ya kaboni ndi atomu ya fluorine yomwe imadzazidwa mokwanira (-CF).₂-CF₂-), ndipo ndi fluoropolymer.
●Zinthu Zake: Chigwirizano champhamvu kwambiri cha kaboni-fluorine chimapangitsa kuti chikhale chopanda mankhwala ambiri komanso kuti chisamavutike ndi nyengo.
Polyester
●Kapangidwe: Unyolo waukulu uli ndi gulu la ester (-COO-), monga PET (polyethylene terephthalate) ndi PBT (polybutylene terephthalate).
●Zinthu Zake: Chigwirizano cha ester chimachipatsa mphamvu yabwino yamakina komanso kuthekera kochikonza, koma kukhazikika kwake kwa mankhwala ndi kochepa kuposa kwa PTFE.
2. Kuyerekeza magwiridwe antchito
| Makhalidwe | PTFE | Polyester (monga PET) |
| Kukana kutentha | - Kutentha kogwiritsidwa ntchito mosalekeza: -200°C mpaka 260°C | - PET: -40°C mpaka 70°C (nthawi yayitali) |
| Kukhazikika kwa mankhwala | Yolimbana ndi pafupifupi ma acid onse, alkali ndi zosungunulira ("mfumu ya pulasitiki") | Yolimba ku asidi ndi alkali zofooka, imawonongeka mosavuta ndi asidi ndi alkali zamphamvu |
| Koyenenti ya kukangana | Yotsika kwambiri (0.04, yodzipaka yokha mafuta) | Zapamwamba (zikufunika zowonjezera kuti ziwongolere) |
| Mphamvu ya makina | Yotsika, yosavuta kukwera | Zapamwamba (PET nthawi zambiri imagwiritsidwa ntchito mu ulusi ndi mabotolo) |
| Katundu wa Dielectric | Zabwino kwambiri (zotetezera kutentha kwambiri) | Zabwino (koma zimakhudzidwa ndi chinyezi) |
| Kuvuta kwa kukonza | Njira yovuta kusungunula (imafunika kusungunuka) | Ikhoza kubayidwa ndi kutulutsidwa (yosavuta kukonza) |
Minda yogwiritsira ntchito
PTFE: imagwiritsidwa ntchito kwambiri mu ndege, zida zamagetsi, makampani opanga mankhwala, kukonza chakudya, zamankhwala ndi zina, nthawi zambiri imagwiritsidwa ntchito popanga zisindikizo, mabearing, zokutira, zinthu zotetezera kutentha, ndi zina zotero.
Polyester: imagwiritsidwa ntchito kwambiri mu ulusi wa nsalu, mabotolo apulasitiki, mafilimu, mapulasitiki aukadaulo ndi zina
Malingaliro Olakwika Ofala
Chophimba chosamata: PTFE (Teflon) imagwiritsidwa ntchito kwambiri m'mapani osamata, pomwe polyester silingathe kupirira kuphika kotentha kwambiri.
Ulusi: Ulusi wa polyester (monga polyester) ndi zinthu zazikulu zopangira zovala, ndipoUlusi wa PTFEamagwiritsidwa ntchito pazinthu zapadera zokha (monga zovala zoteteza mankhwala)
Kodi PTFE imagwiritsidwa ntchito bwanji mumakampani ogulitsa chakudya?
PTFE (polytetrafluoroethylene) imagwiritsidwa ntchito m'makampani azakudya, makamaka chifukwa cha kukhazikika kwake kwa mankhwala, kukana kutentha kwambiri, kusamata komanso kukana pang'ono. Izi ndi zomwe PTFE imagwiritsa ntchito kwambiri m'makampani azakudya:
1. Kuphimba zida zopangira chakudya
Chophimba cha PTFE chimagwiritsidwa ntchito kwambiri pokonza ndi kukonza pamwamba pa zida zopangira chakudya. Kusamamatira kwake kungalepheretse chakudya kumamatira pamwamba pa zidazo panthawi yokonza, motero kumachepetsa njira yoyeretsera ndikuwonjezera magwiridwe antchito opangira. Mwachitsanzo, mu zida monga uvuni, zotenthetsera, ndi zosakaniza, chophimba cha PTFE chingatsimikizire kuti chakudya sichimamatira panthawi yokonza chakudya kutentha kwambiri pomwe chikusunga umphumphu ndi khalidwe la chakudya.
2. Malamba onyamula katundu ndi malamba onyamula katundu
Malamba otumizira ndi malamba otumizira okhala ndi PTFE nthawi zambiri amagwiritsidwa ntchito popanga chakudya chopangidwa mochuluka, monga kuphika ndi kunyamula mazira, nyama yankhumba, masoseji, nkhuku, ndi ma hamburger. Kuchepa kwa kukangana ndi kutentha kwambiri kwa zinthuzi kumathandiza kuti zigwire ntchito bwino m'malo otentha kwambiri popanda kuipitsa chakudya.
3. Mapaipi apamwamba a chakudya
Mapaipi a PTFE amagwiritsidwa ntchito kwambiri ponyamula chakudya ndi zakumwa, kuphatikizapo vinyo, mowa, mkaka, madzi a manyuchi ndi zokometsera. Kusagwira ntchito kwake kwa mankhwala kumatsimikizira kuti sikukhudza ubwino wa zinthu zomwe zaperekedwa pa kutentha kwa -60.°C mpaka 260°C, ndipo sichimayambitsa mtundu uliwonse, kukoma kapena fungo lililonse. Kuphatikiza apo, mapaipi a PTFE amakwaniritsa miyezo ya FDA kuti atsimikizire kuti chakudya chili bwino.
4. Zisindikizo ndi ma gasket
Zisindikizo ndi ma gasket a PTFE amagwiritsidwa ntchito polumikiza mapaipi, ma valve ndi zida zosinthira chakudya. Zitha kukana dzimbiri kuchokera ku mankhwala osiyanasiyana pomwe zimakhalabe zokhazikika m'malo otentha kwambiri. Zisindikizo zimenezi zimatha kuteteza chakudya kuti chisadetsedwe panthawi yokonza zinthu komanso zimathandiza kuti kuyeretsa ndi kukonza zida zikhale zosavuta.
5. Zipangizo zopangira chakudya
PTFE imagwiritsidwanso ntchito popanga zinthu zophikira chakudya, monga zophikira pan zosamatira, zophikira mapepala ophikira, ndi zina zotero. Zinthu zimenezi zimaonetsetsa kuti chakudya sichimamatira panthawi yophikira ndi kuphika, komanso kusunga ukhondo ndi chitetezo cha chakudya.
6. Ntchito zina
PTFE ingagwiritsidwenso ntchito m'magiya, mabearing bushings ndi zida zapulasitiki zopangira chakudya, zomwe zingathandize kuti zida zisawonongeke komanso kuti zisawonongeke komanso kuti zisawonongeke, komanso kuchepetsa ndalama zokonzera.
Zinthu zofunika kuziganizira pa chitetezo
Ngakhale PTFE ili ndi zinthu zambiri zabwino, muyenerabe kusamala za chitetezo chake mukamagwiritsa ntchito mumakampani ogulitsa chakudya. PTFE ikhoza kutulutsa mpweya woipa pang'ono kutentha kwambiri, kotero ndikofunikira kuwongolera kutentha komwe kumagwiritsidwa ntchito ndikupewa kutentha kwambiri kwa nthawi yayitali. Kuphatikiza apo, ndikofunikira kusankha zida za PTFE zomwe zikugwirizana ndi zofunikira zoyenera.
Nthawi yotumizira: Marichi-26-2025