Chophimba cha polima kapena polytetrafluoroethylene pa chophikira chimapanga malo osasunthika.Kupezeka kwa zaka zopitilira 60, polima imathandiza kupewa mazira ndi zikondamoyo kuti zisamamatire mu skillet.Tsoka ilo, zokutira za polima zimachoka zikakandidwa ndi ziwiya zakukhitchini zokhala ndi m'mphepete mwa mikwingwirima kapena ziwiya zopukutira.Chodetsa nkhawa china ndi perfluorooctanoic acid kapena PFOA, mankhwala omwe amagwiritsidwa ntchito ngati polima.Zakhala zikugwirizana ndi khansa mu nyama za labu.Komabe, zophikira zopangidwa ndi polima zimaonedwa kuti ndizotetezeka kugwiritsa ntchito, ngakhale zitakandwa.
Zakhala zikudziwika kwa zaka zambiri kuti kuwonekera kwa anthu ku PFOA kumakhala kotsika kwambiri pansi pamikhalidwe yokhazikika yogwiritsa ntchito zophika zopanda ndodo.Lipoti lomwe langotulutsidwa kumene ndi munthu wina wodalirika, Consumer Reports, latsimikiziranso kuti chiwopsezo chogwiritsa ntchito poto wopanda ndodo ndi chochepa kwambiri, ndikuchepera."Consumer Reports adayesa mapoto osagwira ntchito kuchokera kwa opanga osiyanasiyana kuti ayese chitetezo cha mapoto atsopano ndi ogwiritsidwa ntchito pa kutentha kwa 204 C (400 F) ndipo adapeza kuti kutulutsa kwa PFOA kunali kochepa.“Mlingo wapamwamba kwambiri unali wocheperapo kuŵirikiza nthaŵi 100 kuposa milingo imene kafukufuku wa zinyama akusonyeza kuti n’njodetsa nkhaŵa ndi kudwala PFOA mosalekeza,” inatero magaziniyo m’kope lake la June."Ndi mapani okalamba, mpweya umakhala wovuta kuyeza."Health Canada yanena kuti zokutira zopanda ndodo ndizotetezeka kuti zigwiritsidwe ntchito pa kutentha pansi pa 350 C (662 F).Koma, bungwe la federal linanena kuti kutentha kwakukulu, utsi wokwiyitsa kapena wakupha ukhoza kutulutsidwa. "
Mfundo zoyenera kuziganizira:
Ngati mumaphika pa kutentha kuposa 500 F, mafuta ophikira ndi mafuta ophikira ali pa, kapena mwina afika posachedwa, "pang'onopang'ono."Chifukwa chake, mukupanga chiwopsezo chamoto wamafuta komanso mukuwononga zakudya ndi mafuta, motero mumatulutsa utsi ndi nthunzi zomwe zitha kukhala zowopsa ku thanzi lanu ndi la chiweto chanu, posatengera mtundu wanji.pansimukugwiritsa!
Mankhwala ngati a PFOA amawonjezedwa motsika kwambiri ku ma polima opangidwa ndi fluoro-polymer kuti athandizire ufa wa polima wosamata kumamatira, mugawo lofananira, mpaka apondedwe, kuponyera, kapena zopota zaposachedwa, "kuwotcha" kosamata. kumaliza polima.Munthawi yophika iyi yopangira zophikira, zotsalira zotsalira za PFOA zokhala ngati emulsifiers zimathamangitsidwa kupita ku makina opangira utsi kuchokera kumavuni opangira kutentha kwambiri.Ndiko komwe kumafunikira zowongolera mpweya kuti muchepetse kukhudzidwa kwa ntchito.
Kuchulukirachulukira kwa zinthu za PFOA ndi PFOA m'mitundu yambiri yotentha yamagazi padziko lonse lapansi sikungachitike chifukwa cha zophika.Sikuti anthu onse ali ndi mwayi wopeza zophikira zopanda ndodo!Tiyenera kuyang'ana ku PFOA ina monga momwe zimagwiritsidwira ntchito kumapeto kuti tidziwe komwe kuwonekera kwakukulu kwa nyama kukuchokera.
Nthawi yotumiza: Apr-26-2017