Txij li thaum lub caij nplooj zeeg ntawm yas, nws tau siv dav hauv txhua yam ntawm tib neeg lub neej, coj kev yooj yim rau tib neeg ntau lawm thiab lub neej. Txawm li cas los xij, thaum nws yooj yim, nws cov kev siv thiab pov tseg thiab pov tseg kom nce cov pa phem ib puag ncig, suav nrog cov dej qias neeg xws li xws li dej hiav txwv, ua liaj ua teb, thiab dej hiav txwv.
Polyethylene (PE) yog ib tug dav siv cov tshuaj yas thiab ib qho kev xaiv loj rau biodegradable cov ntaub ntawv.
PE muaj zoo crystallinity, dej vapor teeb meem thiab huab cua kuj, thiab cov khoom no tuaj yeem sib txuas tau zoo li "P yam ntxwv".
Hauv cov txheej txheem ntawm kev nrhiav kom daws tau cov ntaub ntawv zoo nkauj "
Cov khoom ntawm biodegradable cov ntaub ntawv ua tau raws li kev cai nyob rau lub sijhawm cia, thiab tom qab siv, lawv tuaj yeem ua rau ib puag ncig uas tsis muaj mob rau ib puag ncig.
Cov ntaub ntawv biodegradable muaj cov yam ntxwv sib txawv thiab muaj lawv tus kheej zoo thiab qhov tsis zoo. Ntawm lawv, PLA thiab PBat muaj cov qib siab ntawm kev lag luam, thiab lawv cov peev txheej ntau lawm nyob hauv txoj haujlwm tseem ceeb hauv kev ua lag luam. Nyob rau hauv kev txhawb nqa cov kev txwv roj hmab yas, cov khoom lag luam biodegradable siv tau kub heev, thiab cov tuam txhab yas yas loj tau nthuav lawv ntau lawm. Tam sim no, lub ntiaj teb txhua xyoo ntau lawm muaj peev xwm ntau tshaj 400,000 tons, thiab nws yuav tsum tau tshaj 3 lab tons hauv peb lub xyoos tom ntej no. Rau ib qho xwm txheej, qhov no qhia tau tias cov ntaub ntawv pla thiab pbat yog biodegradable cov ntaub ntawv nrog cov kev lees paub tseem ceeb hauv kev ua lag luam.
PBS nyob rau hauv biodegradable cov ntaub ntawv kuj yog cov khoom siv nrog cov txiaj ntsig siab ntawm kev lees paub, kev siv ntau dua, thiab ntau dua cov thev naus laus zis.
Lub peev xwm ntau lawm thiab cov kev cia siab nce ntxiv hauv cov khoom muaj ntau yam nyob rau yav tom ntej xws li Phha, yuav muaj me me, thiab lawv feem ntau siv hauv kev lag luam teb. Qhov laj thawj tseem ceeb yog tias cov ntaub ntawv biodegradable tseem nyob rau hauv thaum ntxov, thev naus laus zis dhau lawm, thiab tam sim no tsis muaj peev xwm sib tw nrog PLA thiab PBat.
Cov ntaub ntawv biodegradable muaj cov yam ntxwv sib txawv thiab muaj lawv tus kheej zoo thiab qhov tsis zoo. Txawm hais tias lawv tsis tag nrho muaj "PE yam ntxwv", qhov tseeb, xws li PLA thiab PBS, uas muaj ESTERSE. Bonded PE, tus ester sib khi hauv nws cov molecular chart muab nws biodegradability, thiab aliphaatic saw muab nws "P yam ntxwv".
Cov khoom siv melting thiab cov neeg kho cua sov, cuam tshuam cov nqi, thiab tus nqi ntawm PBAT thiab PBS tuaj yeem npog cov ntawv thov ntawm PE hauv kev lag luam khoom siv pov tseg.
Cov qib kev lag luam ntawm PLA thiab PBAT yog qhov tseem ceeb, thiab nws tseem yog qhov kev taw qhia ntawm kev loj hlob ntawm kuv lub tebchaws. PLA thiab PBAT muaj cov yam ntxwv sib txawv. Sta yog ib qho nyuaj yas, thiab pbat yog cov yas muag muag. Pla nrog neeg pluag yeeb yaj kiab ua yeeb yaj kiab yog feem ntau sib xyaw nrog lub pbat nrog cov yeeb yaj kiab zoo, uas tuaj yeem txhim kho cov yeeb yaj kiab uas tsis muaj kev ua kom nws cov khoom siv roj lom. unradadability. Yog li ntawd, nws tsis yog tsis muaj exaggeration los hais tias pla thiab pbat tau dhau los ua cov ntaub ntawv ntawm cov khoom siv tsis tau.
Lub Sijhawm Post: Feb-26-2022