Koj tuaj yeem qhia tau li cas yog tias cov khoom siv biodegradable?Peb qhov ntsuas yuav tsum tau saib ntawm: tus txheeb ze degradation tus nqi, cov khoom kawg thiab cov ntsiab lus hnyav hlau.Ib tug ntawm lawv tsis ua raws li cov qauv, yog li nws tsis txawm technically biodegradable.
Tam sim no, muaj ob lub ntsiab ntawm pseudo-degraded plastics: lub tswv yim hloov pauv thiab residue tom qab decomposition.Qhov laj thawj tseem ceeb ntawm kev tsim cov khoom cuav degradable ntau yog tias txoj cai txwv cov yas tau ua rau muaj kev loj hlob tsis tu ncua ntawm kev thov hauv tsev rau cov yas degradable.Tam sim no, "txheej txheem yas" tsuas yog txwv tsis pub tag nrho ntawm cov straws yas, thiab cov peev txheej hauv tsev tuaj yeem raug them.Nyob rau hauv lub neej yav tom ntej, cov ntaub ntawv degradable yuav maj mam dov tawm thiab siv rau tag nrho cov khoom noj khoom haus, thiab kev sib raug zoo ntawm cov khoom siv thiab kev xav tau yuav tsum tau maj mam sib txuam, tab sis cov qauv thiab kev saib xyuas tsis muaj.Ua ke nrog tus nqi siab ntawm cov khoom siv degradable tiag tiag, kev lag luam tau tsav los ntawm kev txaus siab, cov neeg siv khoom muaj peev xwm txheeb xyuas tsis muaj zog, ua rau muaj qhov tsis zoo degradation.
1. Lub tswv yim ntawm cov yas tsis-degradable yog hloov
Cov tsoos plastics thiab ntau yam degradation additives los yog biobased plastics tau sib xyaw ua ke, thiab lub tswv yim ntawm "cov khoom noj khoom haus" thiab "cov khoom tiv thaiv ib puag ncig" raug hloov.Qhov tseeb degradation tus nqi yog tsawg kawg, uas tsis tau raws li qhov yuav tsum tau ntawm cov khoom degradable thiab biochemical qauv.
Wu Yufeng, tus xibfwb ntawm lub koom haum ntawm Kev Lag Luam Kev Lag Luam ntawm Beijing University of Technology, tau hais hauv kev xam phaj nrog Kev Noj Qab Haus Huv Txhua Hnub tias "qib zaub mov" tsuas yog lub teb chaws tus qauv rau kev nyab xeeb ntawm cov khoom siv raw, tsis yog daim ntawv pov thawj ib puag ncig."Thaum peb tham txog 'biodegradable plastics,' peb txhais tau tias cov yas uas, nyob rau hauv tej yam kev mob, nws thiaj li tawg tag rau hauv carbon dioxide los yog methane, dej thiab lwm yam biomass.Qhov tseeb, txawm li cas los xij, ntau lub npe hu ua 'biodegradable plastics' yog cov khoom siv sib xyaw ua ke uas sib xyaw cov khoom siv nrog ntau yam degradation additives lossis biobased plastics.Tsis tas li ntawd, qee cov khoom siv yas txawm siv cov khoom siv yas tsis-degradable, xws li polyethylene, ntxiv oxidation degradation agent, photodegradation agent, thov 'degradable', ostentatizing kev lag luam, cuam tshuam kev lag luam. "
2. Residue tom qab decomposition
Ntxiv ib qho kev faib ua feem ntawm cov hmoov txhuv nplej siab, los ntawm lub cev cov khoom ntawm cov hmoov txhuv nplej siab biodegradable, PE, PP, PVC, thiab lwm yam decomposed tsis tsuas yog absorbed los ntawm ib puag ncig, tab sis vim tsis pom ntawm qhov muag liab qab yuav nyob twj ywm hauv ib puag ncig. , tsis tsuas yog ua rau cov yas rov ua dua tshiab thiab ntxuav, tawg ntawm cov yas rau hauv yuav ua rau muaj kev phom sij ntau dua rau ib puag ncig.
Piv txwv li, D2W thiab D2W1 yog oxidized biodegradation additives.Cov hnab yas ua los ntawm PE-D2W thiab (PE-HD)-D2W1 yog cov hnab yas oxidized biodegradation, hais tias Liu Jun, tus thawj coj ntawm Shanghai Institute of Quality Supervision thiab Inspection Technology thiab xibfwb-theem senior engineer, hauv kev xam phaj nrog Beijing. Xov xwm.Nws suav nrog GB / T 20197-2006 kev faib tawm ntawm cov yas degradable.Tab sis cov txheej txheem ntawm degrading xws li plastics yog tias cov loj loj tau me me thiab cov me me tawg, tig mus rau hauv cov microplastics tsis pom.
Post lub sij hawm: Nov-23-2022