Girazi rine kugadzikana kwemakemikari kwakanyanya. Semudziyo wechikafu nechinwiwa girazi, zviri mukati hazvizosvibiswa. Sechishongo kana zvinodiwa zvezuva nezuva, hutano hwemushandisi hauzokuvadzwa.
(Mumakore achangopfuura, zvakaonekwa kuti bisphenol A inonaya kana mabhodhoro epurasitiki achipisa pa110 ° C, uye bisphenol A (BPA) inovhiringidza kuvharirwa kwevanhu uye ine kukanganisa kwakanyanya kuvacheche.
Muna Gumiguru 2008, Canada yakarambidza kutengeswa kwemabhodhoro ebisphenol A. Muna March 2009, EU yakarambidza kugadzirwa kwemabhodhoro epurasitiki ane bisphenol A; mabhodhoro epurasitiki anoshandiswa muzvinwiwa zvinodhaka nezvinwiwa (sezvinwiwa zvesoda) zvakare anonaya nyore bisphenol A, uye doro nebisphenol A zvinodyidzana kugadzira zvinhu zvine chepfu. Inoshandiswa mukugadzirwa kwechinwiwa Mushure memidziyo yepurasitiki nemapombi epurasitiki, mapurasitiki anokuvadza akaonekwa muwaini.
Antimony mune catalyst yemabhodhoro emvura epurasitiki ichaora mumvura yemukati. Iyo yakareba nguva yekuchengetera mabhodhoro emvura epurasitiki, iyo yakawanda antimony inoburitswa, uye kunaya kweantimony muhafu yegore. Huwandu huchapetwa kaviri, uye tsvakiridzo yakaratidza kuti antimony inokuvadza kumuviri wemunhu.
Kushandisa polyester (PET) mvura yemubhodhoro, nekufamba kwenguva, inogonawo kukonzera macarcinogens akadai seDEHA (adipic acid diester kana kushandurwa se ethylhexylamine) kunayisa. Naizvozvo, iyo US Food and Drug Administration (FDA) yakaona kuti girazi kurongedza kwakachengeteka.
Izvo zvinofanirwa kucherechedzwa kuti soda-lime girasi inodzivirira mvura, acid-resistant uye alkali-resistant.Naizvozvo, soda-lime mabhodhoro egirazi ane alkali mhinduro achanyungudika. Semuenzaniso, mamwe makambani anoshandisa soda-lime girazi sebhodhoro rejekiseni re sodium bicarbonate kuderedza mari. Izvo hazvina kukodzera kubudisa maflakes, uye mishonga yemishonga inofanira kushandisa girasi rekurapa rinokwanisa maererano nemitemo yenyika kana pharmacopoeia mitemo.
Nguva yekutumira: Zvita-12-2019