Shin PTFE lafiya?

PTFE, wanda giant ɗin DuPont na duniya ya ƙirƙira a cikin 1930s, ya zama alama mai yawa na dacewa da dafa abinci kamar kunsa da injin sarrafa abinci.

Amma PTFE na iya zuwa ga ƙarshe - saboda tsarin kera yana amfani da sinadari da ke iya haifar da cutar kansa, kuma Hukumar Kare Muhalli ta Amurka (EPA) tana son a daina amfani da wannan sinadari.

Ana amfani da sinadaran - wanda ake kira perfluorooctanoic acid, ko PFOA - don yin mahadi da ake kira fluoropolymers, wanda ake amfani da su don yin polymer da sauran samfurori kamar man fetur da ruwa mai hana ruwa a kan kafet, yadi, fata da takarda.

An san cewa PFOA ya yadu a cikin jinin jama'a (ko da yake a cikin ƙananan ƙididdiga), inda ya kasance har zuwa shekaru 10 kafin a kawar da shi.A cikin dabbobin dakin gwaje-gwaje, an nuna PFOA yana haifar da ciwon daji, lalacewar hanta, lahani na girma, lalacewar tsarin rigakafi da mutuwa.Babu wata shaida kai tsaye da ke nuna cutarwa ga mutane.

EPA ta tambayi DuPont, da wasu kamfanoni bakwai da ke amfani da PFOA wajen tafiyar da masana'antu, don kawar da amfani da shi.Kamfanin DuPont ya amince da daukar matakan tabbatar da cewa nan da shekara ta 2015, ba za a fitar da sinadarin a cikin muhalli daga masana'antarsa ​​ba, ko da yake bai amince ya daina amfani da shi ba, ko kuma ya daina yin polymer.Matsalar Dupont ita ce, kamar yadda yake a yanzu, ba zai iya yin polymer ba tare da wannan sinadari ba, ko da yake ya ce yana neman madadin.

Tabbas, akwai wasu alamun da kamfanin ya sani na ɗan lokaci cewa PFOA na da haɗari, amma ya ci gaba da amfani da shi.

A cikin 2004, DuPont ya biya dalar Amurka miliyan 300 a matsayin sulhu na waje ga mazauna kusan 50,000 da ke zaune kusa da shukar ta West Virginia kuma waɗanda suka kawo wani mataki a kan kamfanin, suna mai da'awar gurɓata kayan ruwa na gida tare da PFOA, yana haifar da gurɓataccen ruwa. lahanin haihuwa da sauran hadurran lafiya.Kamfanin ya zauna ba tare da amincewa da alhaki ba.

Bayan haka, a cikin 2005, EPA ta ci tarar DuPont jimlar dalar Amurka miliyan 16.5 bayan gano kamfanin ya san sama da shekaru ashirin cewa PFOA na da illa, kuma ta yi shiru game da shi.

Shin zan jefar da kwanon soya dina mara sanda?

Lokacin da ya zo ga samfuran da ba na sanda ba da kansu, DuPont ya ce babu haɗari ga masu siye.PFOA, in ji kamfanin, ana amfani da shi a cikin tsarin masana'antu amma ana fitar dashi yayin wannan aikin.Babu wani PFOA da ya rage a cikin ƙasa mara sanda a cikin samfurin ƙarshe.

EPA ta yarda.'A halin yanzu, EPA ba ta yarda cewa akwai wani dalili na masu amfani da su daina amfani da duk wani mabukaci ko masana'antu da ke da alaƙa da ke ɗauke da PFOA', in ji gidan yanar gizon EPA.

Duk da haka, kwanon frying ba tare da sanda ba na iya sakin gubobi.A yanayin zafi mai zafi an san polymer yana ba da hadaddiyar giyar nau'ikan 15 na barbashi masu guba da gas, gami da trifluoroacetic acid (TFA) da phosgene.Wadannan sinadarai an san suna da guba ga tsuntsaye.Kuma a cikin mutane suna haifar da ciwon kai, sanyi, ciwon baya, da zazzabi - yanayin da aka sani da 'polymer flu'.

DuPont ya yarda da hakan, amma ya ce a cikin mutane yanayin yana canzawa, kuma a kowane hali yana faruwa ne kawai a yanayin zafi, ba lokacin amfani da abinci na yau da kullum ba.

Wannan kuma ita ce hikimar da aka yarda da ita tsakanin ƙungiyoyin masu amfani;a Ostiraliya, alal misali, a cikin watan Nuwamba 2004 'gwajin hanya' na frypans maras sanda, ƙungiyar masu amfani da Australiya ta ce:

Gaskiya ne cewa ana iya ba da sinadarai irin su trifluoroacetic acid (TFA) ta wasu sutura a yanayin zafi sosai.Amma yana da wuya ya faru a lokacin girki na yau da kullun…Bincike bai nuna illar dogon lokaci na TFA akan mutane ba.A wannan mataki babu wata shaida da ke nuna cewa rashin sandunan dafa abinci yana haifar da haɗari.'

Kimanin kashi 80 cikin 100 na kayan dafa abinci marasa sanda a Ostiraliya suna amfani da polymer - sauran sauran kamfanonin sinadarai ne ke yin su ta hanyar amfani da irin wannan tsari wanda ya shafi PFOA.Babu masana'antun masana'antar polymer a Ostiraliya.

Amma Ƙungiyar Aiki ta Muhalli (EWG), ƙungiyar mabukaci mai zaman kanta ta Amurka, tana jayayya da wannan.Ya ce polymer ya fara lalacewa bayan zafin kayan dafa abinci ya kai kusan 260°C (500°F), kuma ya fara rubewa sama da 350°C (660°F).Dafa abinci mai mai da man shanu za su fara ƙonewa da hayaƙi a kusan 200°C (392°F), kuma yawanci ana soya nama tsakanin 200-230°C (400-450°F), amma wurare masu zafi a cikin kwanon rufi na iya sauƙi. wuce wannan zafin jiki.

Kashe gas na iya faruwa lokacin da aka bar kwanon polymer ba tare da kulawa ba.Kasuwar polymer na iya kaiwa 383°C (721°F) a cikin minti biyar kacal da zafi a kan murhun wuta na al'ada, in ji EWG.

Masu amfani za su yanke shawara?

Yana da mahimmanci a lura cewa babu wani samfurin polymer da aka tuno a cikin Amurka, Ostiraliya ko kuma wani wuri dabam.Dangane da hukumomin da ke kula da su, ba su da lafiya – muddin ba ka bar su su yi zafi ba.

Amma binciken da aka gano cewa wani sinadari a cikin tsarin samar da shi yana haifar da ciwon daji, wanda kamfanin ya yarda - tare da 'matsalolin' kamfanin tare da EPA a baya - yana iya yin tasiri.

Matsalar kamfanoni irin su DuPont ita ce, masu siye suna ƙara ladabtar da kayayyaki a kasuwa waɗanda ake ganin suna da alamar tambaya game da amincin su, duk da tabbacin da kamfani ya yi cewa ba su da aminci, ko da sun kasance kayan masarufi a da.Yi tunanin sigari, abinci mai sauri, da hatsin karin kumallo masu haɓaka sukari.