Qhov sib txawv ntawm cov hnab yas degradable thiab tag nrho cov hnab ntim degradable yog qhov tseem ceeb ntawm txoj kev degradation, lub sijhawm, thiab ib puag ncig ntawm cov khoom siv. Cov hauv qab no yog cov ncauj lus kom ntxaws sib piv:
1. Degradation degree
Cov hnab yas degradable: Cov hnab yas degradable xa mus rau cov hnab yas uas tuaj yeem degraded nyob rau hauv tej yam kev mob (xws li lub teeb, tshav kub, oxygen, thiab lwm yam). Lawv feem ntau ntxiv pro-degradants thaum lub sij hawm tsim khoom, uas tso cai rau cov yas maj mam decompose rau hauv me me nyob rau hauv qhov kev txiav txim ntawm lub teeb los yog kub. Txawm hais tias cov khoom no tau decomposed nyob rau hauv tsos, lawv tsis tau degraded tag nrho rau hauv cov khoom tsis muaj teeb meem, thiab tseem yuav muaj teeb meem nrog microplastics.
Cov hnab ntim khoom degradable tag nrho: Cov hnab ntim khoom degradable yog hais txog cov hnab ntim khoom uas tuaj yeem degraded tag nrho hauv ib puag ncig ntuj, thiab nws thiaj li decompose rau hauv dej, carbon dioxide, thiab biomass. Cov hnab yas no feem ntau yog ua los ntawm cov khoom siv bio-raws li (xws li PLA, PHA, thiab lwm yam), los yog cov cuab yeej tshwj xeeb degradation, uas ua rau lawv tuaj yeem degraded tag nrho hauv lub sijhawm luv dua yam tsis muaj cov khoom uas tsim kev puas tsuaj rau ib puag ncig.
2. Lub sijhawm degradation
Cov hnab yas degradable: Lawv lub sij hawm degradation yuav ntev npaum li lub hli los yog xyoo, nyob ntawm tej yam kev mob. Yog tias tsis muaj lub teeb lossis cua sov txaus, cov hnab yas degradable yuav tsis tuaj yeem degrade zoo thiab tseem tuaj yeem ua rau muaj kuab paug rau ib puag ncig.
Lub hnab ntim khoom degradable tag nrho: Lub hnab ntim tau yooj yim degrade sai sai, feem ntau decomposed tag nrho hauv ob peb lub hlis mus rau ib xyoos, thiab yuav tsis tsim cov pa phem ib puag ncig. Cov khoom zoo li no feem ntau yog tsim los rau degrade nyob rau hauv composting tej yam kev mob.
3. Cov khoom muaj pes tsawg leeg
Cov hnab yas degradable: Feem ntau ntawm lawv yog ua los ntawm cov khoom siv roj av ib txwm muaj (xws li PE, PP) nrog cov kev pab cuam degradation, thiab tseem muaj qee feem ntawm cov khoom tsis-degradable. Lawv tsuas yog decomposed rau hauv cov yas me me thiab tsis tshua ploj ntawm ib puag ncig.
Cov hnab ntim khoom degradable: Feem ntau yog ua los ntawm cov khoom siv txuas ntxiv dua tshiab lossis cov khoom siv bio-based, xws li cov hmoov txhuv nplej siab, PLA (polylactic acid), PHA (polyhydroxyalkanoate), thiab lwm yam. Cov ntaub ntawv no tuaj yeem decomposed tag rau hauv cov khoom tsis zoo los ntawm kev ua ntawm cov kab mob.
4. Kev cuam tshuam rau ib puag ncig
Cov hnab yas degradable: Txawm hais tias lawv tuaj yeem decomposed rau qee qhov, lawv tsis tshem tawm cov pa phem tag nrho, thiab microplastics tseem ua rau muaj kev phom sij rau ib puag ncig thiab kab mob.
Cov hnab ntim khoom degradable tag nrho: Lawv muaj zog ib puag ncig kev ua tau zoo thiab tuaj yeem ua kom tawg tag, txo qhov tsis zoo ntawm cov av, dej thiab cov kab mob, yog li lawv raug suav tias yog ib qho kev xaiv zoo rau ib puag ncig.
5. Scope ntawm daim ntawv thov
Cov hnab yas degradable: Feem ntau yog siv rau cov hnab ntim khoom txhua hnub, hnab khib nyiab, thiab lwm yam. Txawm hais tias lawv muaj kev nyab xeeb ntau dua li cov hnab yas, lawv tsis tau ua tiav qhov zoo tshaj plaws kev tiv thaiv ib puag ncig.
Lub hnab ntim khoom degradable: Feem ntau yog siv rau hauv cov ntim khoom noj, ntim cov thawv ntim, cov tais diav pov tseg thiab lwm yam uas yuav tsum tau muaj kev tiv thaiv ib puag ncig siab dua, tshwj xeeb tshaj yog nyob rau hauv cov cheeb tsam uas xav tau siab rau ntsuab ib puag ncig tiv thaiv cov cai thiab cov cai.
Cov hnab yas degradable yog ib qho kev hloov kho ntawm cov yas yas uas muaj peev xwm degradation ib nrab, tab sis tseem muaj teeb meem ib puag ncig.
Cov hnab ntim khoom degradable tag nrho yog ib qho kev xaiv zoo rau ib puag ncig uas tuaj yeem decomposed tag nrho nyob rau hauv ib puag ncig ntuj thiab txo cov kev cuam tshuam mus sij hawm ntev rau lub ecosystem.
