"Degradable plastic" yog ib qho kev daws teeb meem tseem ceeb los tswj cov pa phem.
Kev siv cov yas tsis-degradable yog txwv tsis pub. Dab tsi tuaj yeem siv tau? Yuav txo cov pa phem li cas? Cia cov yas degrade? Ua rau nws ib puag ncig tus phooj ywg khoom. Tab sis, biodegradable plastics puas tuaj yeem txo cov pa phem? Yog tias qee cov tshuaj ntxiv ntxiv rau cov yas kom nws degradable, thiab nws tseem yog raws li cov yas, puas yog qhov tsis muaj kuab paug rau ib puag ncig? Ntau tus neeg tsis ntseeg. Qee tus neeg txawm xav tias qhov no tsuas yog qhov tshiab ntawm kev lag luam carnival. Yog li ntawd, muaj ntau cov yas degradable nrog cov khoom tsis zoo thiab cov nqi ntawm lub khw. Qhov no puas yog qhov zoo lossis qhov phem? Nws puas yuav coj ib puag ncig tshiab?
Ua ntej, cia peb nyiam cov yas degradable. Cov yas degradable tau muab faib ua biodegradable plastics, thermal oxidative degradation plastics, photodegradable plastics thiab compostable plastics. Lawv tag nrho cov "degradable", tab sis tus nqi ntawm thermally oxidatively degradable plastics thiab photodegradable plastics yog ob peb zaug sib txawv ntawm cov biodegradable plastics thiab compostable plastics. Oxygen-degradable plastics thiab light-degradable plastics tau hais tias "poob" los ntawm lub ntiaj teb tsuas yog tom qab raug tshav kub lossis lub teeb rau lub sijhawm. Tab sis nws yog tus nqi qis thiab "yooj yim ploj" cov khoom siv hu ua "PM2.5 ntawm kev lag luam plastics." Vim tias ob lub thev naus laus zis degradation no tsuas tuaj yeem degrade plastics rau hauv cov khoom me me, tab sis tsis tuaj yeem ua rau lawv ploj mus. Cov khoom no tsis pom nyob hauv huab cua, av thiab dej vim lawv cov yam ntxwv me me thiab lub teeb. Z yog thaum kawg nqus tau los ntawm cov kab mob.
Txij li thaum Lub Rau Hli 2019, Tebchaws Europe tau txwv tsis pub siv cov khoom siv pov tseg uas ua los ntawm cov khoom siv thermally oxidative degradable, thiab Australia yuav tshem tawm cov yas no hauv 2022.
Hauv Suav teb qhov twg "degradation fever" nyuam qhuav tshwm sim, "pseudo-degradable plastics" zoo li qhov no tseem nyiam coob tus neeg yuav khoom uas xav yuav "cov hnab yas degradable" ntawm tus nqi qis tab sis tsis paub qhov tsis paub. Qhov "Kev Cai Txiav Txim Yas" tshaj tawm xyoo 2020 txwv tsis pub siv "cov hnab yas uas tsis tuaj yeem degradable" thiab tsis qhia meej tias cov hnab yas degradable yuav tsum tau siv. Vim tias cov khoom siv biodegradable siab, thermal oxidative degradation plastics, photodegradable plastics, los yog bio-based hybrid plastics kuj yog cov kev xaiv zoo rau cov cheeb tsam uas tsis tas yuav siv cov khoom siv biodegradable tag nrho. Txawm hais tias cov yas no tsis tuaj yeem degraded tag nrho, tsawg kawg yog ib feem ntawm PE ploj lawm.
Txawm li cas los xij, hauv kev lag luam chaotic, feem ntau nyuaj rau cov neeg siv khoom los txheeb xyuas cov khoom ntawm cov yas degradable. Qhov tseeb, feem ntau cov lag luam tsis paub qhov txawv ntawm cov yas uas muaj degradable tag nrho thiab thermally oxidatively degradable plastics, light-degradable plastics thiab bio-based hybrid plastics. Lawv feem ntau xaiv qhov pheej yig tom kawg, xav tias nws yog qhov degradable tag nrho. Qhov no yog vim li cas ntau tus neeg siv khoom yuav hais tias: "Vim li cas koj chav tsev nqi ntau zaus ntau dua li lwm tus? Raws li cov chaw tsim khoom, nws tsis tuaj yeem ua rau cov neeg siv khoom yuam kev los ntawm kev sau cov qauv nrog 'degradable' ntawm cov khoom zoo li no.
Cov yas degradable zoo tagnrho yuav tsum yog "cov khoom siv biodegradable tag nrho." Tam sim no, cov khoom siv biodegradable feem ntau yog polylactic acid (PLA), uas yog ua los ntawm biomaterials xws li hmoov txhuv nplej siab thiab pob kws. Los ntawm cov txheej txheem xws li av faus, composting, degradation dej tshiab, thiab dej hiav txwv degradation, cov khoom no tuaj yeem degraded tag nrho rau hauv dej thiab carbon dioxide los ntawm cov kab mob uas tsis ua rau lub nra ntxiv rau ib puag ncig.
Hauv cov nroog uas tau siv "kev txwv txiav yas", peb tuaj yeem pom cov hnab yas biodegradable uas tau raws li tus qauv G tshiab. Hauv qab ntawm nws, koj tuaj yeem pom cov cim ntawm "PBAT + PLA" thiab "jj" lossis "taum sprouts". Tam sim no, tsuas yog cov khoom siv biodegradable uas ua tau raws li tus qauv yog cov khoom siv degradable zoo tshaj plaws uas tsis muaj kev cuam tshuam rau ib puag ncig.
Dingli Ntim qhib kev ntim zaub ntsuab rau koj!
Post lub sij hawm: Jan-07-2022