Cov khob ntawv PLA puas zoo rau ib puag ncig dua li cov khob ntawv PE? Nws tsis yog qhov tseeb!

Hauv peb lub neej, cov khob ntawv pov tseg yog qhov tseem ceeb heev. Txawm hais tias nws yog rau kev txais tos cov txheeb ze, cov phooj ywg thiab cov neeg siv khoom, lossis ua ib txoj hauv kev tshaj tawm, cov khob ntawv no yuav tsum tau siv. Tam sim no, cov khob ntawv pov tseg hauv khw feem ntau yog cov khob ntawv PE coated thiab cov khob ntawv PLA coated. Ob yam khoom no twg zoo dua thiab zoo rau ib puag ncig?

Cov khob ntawv ib txwm siv ib txheej PE txheej rau ntawm qhov chaw ntawm daim ntawv hauv paus kom tau txais kev ua haujlwm zoo tiv thaiv dej thiab roj. Cov khob ntawv PE-coated tsis lwj, tsis rov ua dua, thiab nyuaj rau rov ua dua tshiab. Cov khob ntawv PE-coated ib txwm nyuaj rau rov ua dua tshiab vim tias nws nyuaj rau cais cov zaj duab xis polyethylene ntawm qhov chaw ntawm lub khob ntawv ntawm lub khob ntawv.

Cov khoom siv PLA yog ib hom khoom siv tshiab uas lwj tau. Nws yog ib yam khoom uas rho tawm los ntawm cov hmoov txhuv nplej siab. Tom qab siv, nws tuaj yeem lwj los ntawm cov kab mob me me hauv qhov xwm txheej tshwj xeeb, thiab qhov lwj thaum kawg tuaj yeem tsim cov pa roj carbon dioxide thiab dej.

Cov khob PLA coated feem ntau raug touted ua “tus phooj ywg ib puag ncig” lwm txoj hauv kev rau PE coated khob ntawv, qhov tseeb yog tias PLA yog qhov tseem ceeb yas thiab raug kev txom nyem los ntawm tib yam teeb meem li PE coated khob ntawv. Qhov biodegradability ntawm PLA yuav tsum ua tau raws li ob qho xwm txheej: 50% -60% av noo thiab 50-70 degrees Celsius kub. Nyob rau hauv cov xwm txheej no, nws muaj peev xwm rau cov kab mob me me kom maj mam lwj PLA tom qab ob peb lub hlis lossis ntev dua. Txawm li cas los xij, nws nyuaj rau qhov chaw ib puag ncig kom ncav cuag qhov kub tsim nyog rau kev lwj. Yog tias cov khoom PLA raug pov tseg ntawm qhov xav tau, lawv tsis tuaj yeem lwj tiag tiag. Yuav kom lwj PLA, nws yuav tsum tau ua tiav hauv kev lag luam hauv cov chaw ua composting tshwj xeeb. Qhov tseeb, ob peb lub tebchaws muaj cov chaw lag luam no.

Ntxiv rau, kev tshawb fawb tau qhia tias qhov kev puas tsuaj ntawm PLA yuav luag tsis txawv ntawm cov yas ib txwm muaj hauv dej tshiab thiab dej hiav txwv. Lub Koom Haum European Plastics kuj tau hais tias cov yas uas lwj tau tsis tuaj yeem suav tias yog ib puag ncig zoo dua li cov yas uas tsis lwj ib txwm muaj. Yog tias cov xwm txheej kev puas tsuaj tsis raug ua tiav, yeej tsis muaj qhov sib txawv ntawm “cov yas uas lwj tau” thiab cov yas ib txwm muaj.

Txawm hais tias cov khob ntawv PLA coated tuaj yeem lwj tau, tus nqi ntawm cov khoom siv PLA yog 2-3 npaug ntau dua li PE, thiab cov nqi khoom siv raw siab dua ua rau tus nqi siab dua. Yog li ntawd, cov khob ntawv pov tseg tseem ceeb hauv kev ua lag luam yog cov khob ntawv PE coated.