Bioplastics
Nyob ntawm cov khoom siv, lub sij hawm nws yuav siv sij hawm rau bioplastics kom tag nrho composted yuav siv sij hawm sib txawv thiab yuav tsum tau composted nyob rau hauv lub lag luam composting chaw, qhov twg siab dua composting kub yuav ua tau tiav, thiab ntawm 90 mus rau 180 hnub.Feem ntau ntawm cov txheej txheem thoob ntiaj teb uas twb muaj lawm xav kom 60% ntawm cov kab mob yuav tsum degraded nyob rau hauv 180 hnub, nrog rau lwm cov qauv uas hu rau resins los yog compostable khoom.Nws tseem yog ib qho tseem ceeb kom paub qhov txawv ntawm degradable thiab biodegradable thiab compostable, vim tias cov ntsiab lus no feem ntau siv sib hloov.
Biodegradable yas
Biodegradable yas yog ib hom yas uas yuav degraded los ntawm tej yam kab mob microorganisms (xws li kab mob, fungi, thiab lwm yam) nyob rau ib lub sij hawm.Nco ntsoov tias tsis muaj kev lav phib xaub tawm "tsis muaj tshuaj lom" residues, lossis lub sijhawm xav tau rau biodegradation.
Kev rov ua dua tshiab kuj tseem ceeb rau ib puag ncig, thiab vim li no peb kuj muaj nplooj ntawv ntawm cov hnab rov ua dua tshiab nrog qee cov ntaub ntawv nthuav dav.
Biodegradable yas
Cov yas degradable muaj xws li txhua hom yas degradable, nrog rau biodegradable thiab compostable plastics.Txawm li cas los xij, cov yas uas tsis yog biodegradable lossis tsis yog compostable feem ntau siv cov ntawv lo "degradable plastics".Cov khoom lag luam feem ntau siv cov ntawv yas biodegradable, uas yuav degrade vim lub cev thiab tshuaj cuam tshuam.Kev ua haujlwm lom neeg tsis yog ib feem tseem ceeb ntawm kev degradation ntawm cov khoom no, los yog cov txheej txheem qeeb dhau los muab cais ua biodegradable lossis compostable.
Hom ntawm cov yas degradable
Starch raws
Qee cov khoom yas degradable yog tsim los ntawm pob kws hmoov txhuv nplej siab.Cov ntaub ntawv no feem ntau yuav tsum muaj ib puag ncig microbial ua ntej lawv degrade, xws li cov khib nyiab lossis cov khib nyiab, qee qhov yuav raug degraded tag nrho hauv ib puag ncig no, thaum lwm tus tsuas yog puncture, thaum cov khoom yas yuav tsis degrade.Cov khoom yas uas tseem tshuav tuaj yeem ua rau cov av, noog thiab lwm yam tsiaj qus thiab nroj tsuag.Txawm hais tias kev siv cov khoom xyaw txuas ntxiv zoo li ntxim nyiam hauv txoj cai, lawv tsis muaj txoj hauv kev zoo tshaj plaws rau kev txhim kho.
Aliphatic
Lwm hom yas degradable siv kuj kim aliphatic polyesters.Zoo ib yam li cov hmoov txhuv nplej siab, lawv nyob ntawm microbial kev ua ntawm compost los yog landfills ua ntej lawv degrade.
Photodegradable
Lawv yuav degrade thaum raug tshav ntuj, tab sis yuav tsis degrade nyob rau hauv qhov chaw pov tseg, dej phwj tuaj, los yog lwm qhov chaw tsaus.
Biodegradable oxygen
Cov khoom saum toj no yog degraded los ntawm cov txheej txheem hydration degradation, tab sis txoj kev siv tau zoo tshaj plaws thiab kev lag luam hauv cov cuab yeej tshiab yog tsim cov yas, thiab cov yas yog degraded los ntawm OXO degradation txheej txheem.Lub tshuab yog raws li kev qhia me me ntawm degrading additives (feem ntau 3%) rau hauv cov txheej txheem tsim khoom, yog li hloov cov khoom ntawm cov yas.Nws tsis yog nyob ntawm cov kab mob microorganisms los rhuav tshem cov yas.Plastics pib degrade tam sim ntawd tom qab kev tsim khoom thiab ceev degradation thaum raug tshav kub, lub teeb los yog siab.Cov txheej txheem no yog irreversible thiab txuas ntxiv mus txog thaum cov khoom raug txo kom tsuas yog carbon dioxide thiab dej.Yog li ntawd, nws yuav tsis tso cov roj av polymer tawg hauv av.
Post lub sij hawm: Apr-07-2021