Niaj hnub no, cia peb tham txog straws uas muaj feem xyuam nrog peb lub neej. Straws kuj tau siv ntau dua hauv kev lag luam khoom noj.
Cov ntaub ntawv hauv online qhia tau hais tias xyoo 2019, kev siv cov straws yas ntau tshaj 46 billion, ib tus neeg noj tau tshaj 30, thiab tag nrho cov kev siv yog li ntawm 50,000 txog 100,000 tons. Cov straws yas tsoos no tsis yog degradable, vim lawv siv ib zaug, lawv tuaj yeem muab pov tseg ncaj qha tom qab siv. txhua yam cuam tshuam.
Straws yog qhov tseem ceeb hauv kev noj zaub mov, tshwj tsis yog tib neeg hloov lawv txoj kev ua neej, xws li: hloov txoj kev haus dej rau cov dej haus tsis muaj straws; siv cov tsis siv quav ciab xws li cov tshuab nqus tsev, uas zoo li yuav kim dua; thiab siv cov straws reusable, xws li stainless hlau straws thiab iav straws, nws zoo li tsis yooj yim. Tom qab ntawd, txoj hauv kev zoo dua tam sim no yuav yog siv cov straws uas muaj peev xwm degradable, xws li biodegradable yas straws, ntawv straws, starch straws, thiab lwm yam.
Vim li no, pib txij thaum kawg ntawm 2020, kuv lub teb chaws txoj kev lag luam catering tau txwv tsis pub siv cov straws yas thiab hloov cov straws uas tsis yog degradable nrog cov straws degradable. Yog li, tam sim no cov khoom siv raw rau kev tsim cov straws yog cov ntaub ntawv polymer, uas yog cov khoom siv degradable.
Cov khoom siv degradable PLA rau kev ua straws muaj qhov zoo ntawm kev degradable kiag li. PLA muaj biodegradability zoo, thiab nws degrades los tsim CO2 thiab H2O, uas tsis muaj kuab paug ib puag ncig thiab muaj peev xwm ua tau raws li cov kev xav tau ntawm industrial composting. Cov txheej txheem ntau lawm yog yooj yim thiab lub voj voog ntau lawm yog luv. Cov straw extruded ntawm qhov kub thiab txias tau zoo thermal stability thiab hnyav kuj. Lub gloss, pob tshab thiab kev xav ntawm cov khoom tuaj yeem hloov cov khoom siv roj av, thiab txhua qhov ntsuas lub cev thiab tshuaj lom neeg ntawm cov khoom tuaj yeem ua tau raws li cov cai ntawm cov khoom noj hauv zos. Yog li ntawd, nws yog dav siv thiab muaj peev xwm ua tau raws li qhov xav tau ntawm cov dej haus feem ntau hauv kev ua lag luam tam sim no.
PLA straws muaj cov dej noo zoo thiab huab cua nruj, thiab ruaj khov ntawm chav tsev kub, tab sis yuav cia li degrade thaum qhov kub siab tshaj 45 ° C los yog nyob rau hauv qhov kev txiav txim ntawm oxygen enrichment thiab microorganisms. Kev saib xyuas tshwj xeeb yuav tsum tau them rau qhov kub thiab txias thaum lub sijhawm thauj khoom thiab khaws cia. Lub sij hawm ntev kub tuaj yeem ua rau deformation ntawm PLA straws.
Kuj tseem muaj ib daim ntawv straw peb muaj. Daim ntawv straw yog tsim los ntawm ib puag ncig tus phooj ywg raw ntoo pulp ntawv. Nyob rau hauv cov txheej txheem molding, nws yog ib qho tsim nyog yuav tsum tau them sai sai rau yam xws li tshuab ceev thiab cov kua nplaum. , thiab kho txoj kab uas hla ntawm straw los ntawm qhov loj ntawm mandrel. Tag nrho cov txheej txheem ntawm cov ntawv straws yog qhov yooj yim thiab yooj yim rau kev tsim khoom loj.
Txawm li cas los xij, tus nqi ntawm cov ntawv straws yog siab, thiab qhov kev paub yuav tsum tau ua kom zoo dua. Cov ntawv ua raws li cov zaub mov thiab cov nplaum yuav tsum tau siv. Yog tias nws yog daim ntawv straw nrog cov qauv, cov khoom noj khoom haus ntawm tus cwj mem yuav tsum tau ua raws li qhov yuav tsum tau ua, vim tias lawv txhua tus yuav tsum muaj kev sib cuag ncaj qha nrog cov khoom noj, thiab cov khoom noj khoom haus zoo yuav tsum tau lav. Nyob rau tib lub sijhawm, nws yuav tsum haum rau ntau yam dej qab zib hauv khw. Ntau daim ntawv straws ua raun thiab gel thaum raug dej kub los yog dej qab ntsev. Cov no yog cov teeb meem peb yuav tsum tau xyuam xim rau.
Lub neej ntsuab ua rau muaj kev lag luam ntsuab. Ntxiv rau cov straws uas tau hais los saum toj no, raws li "kev txwv txiav yas", ntau thiab ntau cov neeg siv khoom thiab cov lag luam tau pib nyiam cov straws ntsuab, thiab kuv ntseeg tias yuav muaj lwm txoj hauv kev. Ntsuab, ib puag ncig tus phooj ywg thiab kev lag luam straw khoom yuav tawm tsam "cua".
Puas yog degradable straws yog cov lus teb zoo tshaj?
Lub hom phiaj tseem ceeb ntawm kev txwv txiav yas yog qhov tsis ntseeg los txhawb cov khoom lag luam zoo ib puag ncig los ntawm kev txwv thiab txwv tsis pub tsim khoom, muag thiab siv cov khoom yas, thaum kawg txhawb nqa tus qauv tshiab ntawm kev rov ua dua tshiab, thiab txo cov khoom pov tseg yas hauv qhov chaw pov tseg.
Nrog cov straws yas degradable, puas tsis tas yuav txhawj xeeb txog kev ua qias tuaj thiab kev siv tsis tau?
Tsis yog, cov khoom siv raw ntawm cov yas degradable yog cov pob kws thiab lwm cov qoob loo zaub mov, thiab kev siv tsis tswj yuav ua rau cov khoom noj khoom haus pov tseg. Tsis tas li ntawd, kev nyab xeeb ntawm cov khoom yas degradable yog tsis siab dua li cov khoom siv yas. Ntau lub hnab yas degradable yooj yim tawg thiab tsis ruaj khov. Vim li no, qee cov neeg tsim khoom yuav ntxiv ntau yam khoom ntxiv, thiab cov additives no yuav muaj kev cuam tshuam tshiab rau ib puag ncig.
Tom qab kev faib cov khib nyiab pov tseg, cov khib nyiab zoo li cas yog cov yas degradable?
Hauv cov teb chaws Europe thiab Asmeskas, nws tuaj yeem raug faib ua "cov khib nyiab pov tseg", lossis tso cai pov tseg ua ke nrog cov khoom noj pov tseg, yog tias muaj kev cais cais thiab sib sau ua ke tom qab kawg. Hauv cov txheej txheem kev faib tawm los ntawm ntau lub nroog hauv kuv lub tebchaws, nws tsis tuaj yeem rov ua dua.
Post lub sij hawm: Feb-21-2022