Puas yog PTFEsafe?

PTFE, tsim los ntawm lub ntiaj teb tshuaj loj heev DuPont nyob rau hauv 1930s, tau los ua ntau lub cim ntawm chav ua noj yooj yim li cling qhwv thiab cov khoom noj processor.

Tab sis PTFE tuaj yeem dhau los ua qhov nplaum nplaum - vim tias cov txheej txheem tsim khoom siv cov tshuaj uas ua rau mob qog noj ntshav, thiab US Environmental Protection Agency (EPA) xav kom siv cov tshuaj no tawm mus.

Cov tshuaj - hu ua perfluorooctanoic acid, los yog PFOA - yog siv los ua cov tebchaw hu ua fluoropolymer, uas yog siv nyob rau hauv lem ua polymer thiab lwm yam khoom xws li roj thiab dej-repellent coatings rau ntaub pua plag, textiles, tawv thiab ntawv.

Nws tau paub tias PFOA muaj ntau nyob rau hauv cov ntshav ntawm cov pej xeem (txawm hais tias nyob rau hauv qis concentrations), qhov twg nws nyob mus txog rau 10 xyoo ua ntej raug tshem tawm.Hauv cov tsiaj kuaj, PFOA tau pom tias ua rau mob qog noj ntshav, lub siab puas tsuaj, kev loj hlob tsis zoo, kev tiv thaiv kab mob thiab kev tuag.Tsis muaj pov thawj ncaj qha tias nws muaj kev phom sij rau tib neeg.

EPA tau nug DuPont, thiab xya lwm lub tuam txhab uas siv PFOA hauv cov txheej txheem tsim khoom, kom tshem tawm nws siv.DuPont tau pom zoo ua cov kauj ruam kom paub tseeb tias los ntawm xyoo 2015, cov tshuaj yuav tsis raug tso tawm rau hauv ib puag ncig los ntawm nws cov chaw tsim khoom, txawm hais tias nws tsis tau pom zoo txwv tsis pub siv, lossis kom tsis txhob ua cov polymer.Qhov teeb meem rau Dupont yog, raws li nws sawv tam sim no, nws tsis tuaj yeem ua polymer yam tsis muaj cov tshuaj no, txawm hais tias nws tab tom nrhiav kev hloov.

Qhov tseeb, muaj qee qhov qhia tias lub tuam txhab tau paub qee lub sijhawm tias PFOA txaus ntshai, tab sis khaws cia siv nws.

Xyoo 2004, DuPont tau them US $ 300 lab raws li kev sib hais hauv tsev hais plaub rau thaj tsam 50,000 tus neeg nyob ze uas nyob ze nws West Virginia cov nroj tsuag thiab leej twg coj cov chav kawm tawm tsam lub tuam txhab, thov tias nws yog lub luag haujlwm rau paug cov khoom siv dej hauv zos nrog PFOA, ua rau kev yug me nyuam thiab lwm yam teeb meem kev noj qab haus huv.Lub tuam txhab txiav txim tsis lees txais kev lav phib xaub.

Ua raws li qhov no, xyoo 2005, EPA tau nplua nyiaj DuPont tag nrho US $ 16.5 lab tom qab pom tias lub tuam txhab tau paub ntau tshaj ob xyoo lawm tias PFOA muaj teeb meem, thiab nyob ntsiag to txog nws.

Kuv puas yuav tsum pov kuv lub lauj kaub uas tsis yog nplaum?

Thaum nws los txog rau cov khoom tsis-stick lawv tus kheej ho, DuPont hais tias tsis muaj kev pheej hmoo rau cov neeg siv khoom.PFOA, hais tias lub tuam txhab, tau siv rau hauv cov txheej txheem tsim khoom tab sis raug tsav tawm thaum lub sijhawm txheej txheem.Tsis muaj PFOA sab laug nyob rau hauv qhov chaw uas tsis yog-stick hauv cov khoom kawg.

EPA pom zoo.'Lub sijhawm tam sim no, EPA tsis ntseeg tias muaj ib qho laj thawj rau cov neeg siv khoom txwv tsis pub siv cov neeg siv khoom lossis cov khoom lag luam cuam tshuam nrog PFOA', hais tias EPA lub vev xaib.

Txawm li cas los xij, cov lauj kaub uas tsis yog nplaum tuaj yeem tso cov co toxins.Thaum kub kub polymer paub tias muab cov dej cawv ntawm 15 hom tshuaj lom thiab cov pa roj, suav nrog trifluoroacetic acid (TFA) thiab phosgene.Cov tshuaj no paub tias muaj tshuaj lom rau cov noog.Thiab hauv tib neeg lawv mob taub hau, ua daus no, mob nraub qaum, thiab kub taub hau - ib yam mob hu ua 'polymer flu'.

DuPont lees paub qhov no, tab sis nws hais tias nyob rau hauv tib neeg tus mob yog thim rov qab, thiab nyob rau hauv txhua rooj plaub nws tsuas yog tshwm sim ntawm kub kub, tsis yog thaum lub sij hawm ua noj ua haus.

Qhov no ib yam nkaus thiab lees paub kev txawj ntse ntawm cov neeg siv khoom;Hauv Australia, piv txwv li, nyob rau lub Kaum Ib Hlis 2004 'txoj kev sim' ntawm cov khoom tsis yog-stick frypans, Australian Consumers' Association tau hais tias:

'Nws muaj tseeb tias cov tshuaj xws li trifluoroacetic acid (TFA) tuaj yeem muab tawm los ntawm qee cov txheej txheem ntawm qhov kub siab heev.Tab sis nws tsis zoo li yuav tshwm sim thaum ua noj ua haus ib txwm… Kev tshawb fawb tsis tau qhia tias muaj kev phom sij ntev ntawm TFA rau tib neeg.Nyob rau theem no tsis muaj pov thawj tias kev ua noj tsis yog nplaum ua rau muaj kev nyab xeeb.'

Kwv yees li 80 feem pua ​​​​ntawm cov khoom siv hauv chav ua noj uas tsis yog-stick rau muag hauv Australia siv cov khoom siv polymer - tus so yog tsim los ntawm lwm cov tuam txhab tshuaj siv cov txheej txheem zoo sib xws uas cuam tshuam nrog PFOA.Tsis muaj cov chaw tsim khoom polymer hauv Australia.

Tab sis Pawg Neeg Ua Haujlwm Ib Cheeb Tsam (EWG), ib pab pawg neeg siv khoom ywj pheej hauv Teb Chaws Asmeskas tsis tau txais txiaj ntsig, tawm tsam qhov no.Nws hais tias polymer pib deteriorate tom qab qhov kub ntawm cookware nce mus txog 260 ° C (500 ° F), thiab pib decompose ntau tshaj 350 ° C (660 ° F).Ua noj cov rog, roj thiab butter yuav pib scorch thiab haus luam yeeb ntawm li 200 ° C (392 ° F), thiab nqaij feem ntau yog kib ntawm 200-230 ° C (400-450 ° F), tab sis cov kub kub hauv lub lauj kaub tuaj yeem yooj yim. tshaj qhov kub no.

Off-gassing tuaj yeem tshwm sim thaum lub lauj kaub polymer tso tseg tsis muaj neeg saib xyuas.Ib lub lauj kaub polymer tuaj yeem ncav cuag 383 ° C (721 ° F) hauv tsuas yog tsib feeb rhuab ntawm cov pa, hluav taws xob qhov cub, hais tias EWG.

Cov neeg siv khoom txiav txim siab?

Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias tsis muaj cov khoom lag luam polymer tau rov qab los hauv Asmeskas, Australia lossis lwm qhov chaw.Raws li kev tswj hwm lub cev muaj kev txhawj xeeb, lawv muaj kev nyab xeeb - tsuav koj tsis txhob cia lawv kub dhau.

Tab sis qhov kev tshawb pom tias cov tshuaj lom neeg hauv cov txheej txheem tsim khoom tau raug txheeb xyuas tias ua rau mob qog noj ntshav, lees paub los ntawm lub tuam txhab - nrog rau lub tuam txhab 'kev nyuaj' nrog EPA yav dhau los - yuav muaj txiaj ntsig.

Qhov teeb meem rau cov tuam txhab xws li DuPont yog, cov neeg siv khoom raug nplua ntxiv rau cov khoom lag luam hauv khw uas pom tias muaj cov lus nug txog lawv txoj kev nyab xeeb, txawm tias cov tuam txhab lees paub tias lawv muaj kev nyab xeeb, txawm tias lawv yog cov neeg siv khoom ib zaug.Xav txog cov luam yeeb, khoom noj ceev, thiab qab zib-ua kom zoo noj tshais cereals.