Nrog rau kev ua raws li qhov yuav tsum tau cais cov khib nyiab hauv ob xyoos dhau los, cov ntaub ntawv biodegradable tau maj mam dhau los ua lub tswv yim kub. Dab tsi yog cov khoom siv biodegradable, thiab nws siv nyob rau hauv qhov twg? Peb yuav paub qhov txawv ntawm cov khoom no li cas?
Txoj kev loj hlob ntawm cov hnab yas ntim rau hauv cov kev taw qhia ntsuab yog ze ze rau tib neeg' kev txhawj xeeb txog kev tiv thaiv ib puag ncig. Txij li xyoo 1970, ntau lub tebchaws tau pib tsim cov hnab yas ntsuab.
Txij li cov ntaub ntawv polyolefin feem ntau yog ua los ntawm PE thiab PP tsis tuaj yeem decomposed hauv lub sijhawm luv luv, cov kws tshawb fawb thaum kawg tau tsim cov ntaub ntawv polyester uas tuaj yeem decomposed los ntawm cov kab mob los ntawm kev tshawb fawb, nrog rau qee cov khoom siv txuas ntxiv (xws li straw, Bagasse, pob kws hmoov nplej, thiab lwm yam) tau muab rho tawm los ntawm cov khoom siv ntsuab hluavtaws los tsim cov hnab yas ntsuab biodegradable tiag tiag.
Lub hnab ntim biodegradable yuav tsum ua tau raws li peb yam kev mob: ua ntej, nws yuav tsum tau degradable kiag li, thiab cov khoom yog carbon dioxide thiab dej; thib ob, nyob rau hauv cov xwm txheej ntawm kev lag luam composting, nws yuav tsum tau degraded tag nrho nyob rau hauv 180 hnub; thib peb, tom qab degradation, nws tsis tsim muaj toxicity. Tsis muaj kev cuam tshuam rau ib puag ncig.
Cov ntaub ntawv biodegradable tau siv dav hauv cov hnab ntim khoom tsim. Hom hnab ntim no tuaj yeem ua tiav hauv cov nroj tsuag composting thiab hloov mus rau hauv cov organic chiv hauv 30-45 hnub. Txij li thaum xyoo 1990, cov tebchaws sab hnub poob tau pib siv cov hnab ntim khoom noj khoom haus biodegradable thiab cov hnab ntim khoom noj.
Vim lub sijhawm luv luv ntawm kev siv cov hnab ntim khoom biodegradable hauv Suav teb, ntau cov neeg siv khoom uas xav tau cov hnab ntim khoom customized tsis nkag siab yuav ua li cas txheeb xyuas cov hnab ntim biodegradable. Vim tias lub hnab ntim khoom zoo li no tsis txawv ntawm cov hnab yas zoo li qub, cov qauv tsim tau raug tshaj tawm thoob ntiaj teb: ISO14855, EN13432, ASTM-D6400.
Tam sim no muaj peb qhov tseem ceeb thoob ntiaj teb lees paub cov ntawv pov thawj:" OK Compost"," Seedling" thiab" BPI". Yog li ntawd, yog tias muaj cov hom ntawv pov thawj no, lawv tuaj yeem raug txheeb xyuas tias yog biodegradable ntim hnab.
