Ua npuas ncauj ?!
Feem ntau ua npuas ncauj tsis degraded nyob rau hauv ib puag ncig ib puag ncig, ua rau muaj kuab paug heev. Lub caij no, kev pov tseg ntawm cov khoom ua npuas ncauj tau dhau los ua ib qho tseem ceeb ntxiv rau cov tuam ntxhab thiab cov hloov pauv ntawm cov npuas dej. Ua npuas ncauj yog ib qho khoom ntim tab sis lub teeb-hnyav, yog li dab tsi muaj txoj hauv kev los pov tseg cov npuas npuas? Yuav ua li cas daws cov pa phem ntawm qhov qub?
Cov npuas npuas tuaj qhov twg?
Txij hnub uas thawj zaug thaiv ntawm cov npuas dej tau tsim thiab hloov mus rau hauv qhov txiav, cov lus nug ntawm yuav ua li cas nrog cov seem seem muaj
ua on lub siab ntawm npuas kev lag luam kws txawj thiab cov kws tshaj lij.
Cov ua npuas dej seem - lossis cov ua npuas dej txiav tawm - yog cov khoom seem ntawm cov txheej txheem tsim ua npuas dej. Kev ua haujlwm zoo ntawm kev tsim khoom qhia tias lub tshuab hloov ua npuas dej lub hom phiaj yog tsim cov khoom ntau li ntau tau los ntawm ib lub pob ntawm cov khoom siv raw, yog li ntawd txo cov npuas dej seem. Txawm li ntawd los, yuav luag txhua lub pob ntawm cov npuas dej uas tau hloov pauv tsim tsawg kawg yog me me ntawm cov khoom seem.
Cov ua npuas dej uas yoog tau thawj zaug tau tsim thaum Tsov Rog Thoob Ntiaj Teb Zaum Ob rau kev siv ua cov txheej txheej rau dav hlau. Txawm li cas los xij, kev tsim khoom me me, thiab nws tsis yog txog rau xyoo 1950 uas cov tuam txhab tshuaj lom neeg loj xws li DuPont, BASF thiab Dow Chemicals pib tsim toluene diisocyanate thiab polyurethane polyols, uas xav tau los tsim cov ntim loj ntawm polyurethane ua npuas dej thiab melamine ua npuas dej.
Hauv 60 xyoo dhau los, nws tau kwv yees tias qhov no tam sim no suav nrog ntau lab tons ntawm cov khoom siv ua npuas ncauj. Tab sis tus npaus ntawd mus qhov twg? Tej zaum qhov kev xav ntau dua yog tias tib lo lus nug no tuaj yeem siv rau polyethylene, melamine ua npuas ncauj, thiab lwm yam khoom siv kaw, cov khoom tsim tawm kuj ua rau tons ntawm khib nyiab thiab khib nyiab txhua xyoo.
Cov txheej txheem pov tseg ntawm cov npuas npuas
Cov kev xaiv rau cov khib nyiab pov tseg yog nyob ntawm qhov ntom thiab zoo ntawm cov khoom uas tau tsim. Tag nrho ntau zaus, hlawv cov khoom ua npuas ncauj yog suav tias yog txoj hauv kev kom tshem tawm cov khib nyiab.
Flexible foams tuaj yeem hlawv tau yooj yim, tab sis cov txheej txheem no ua rau cov pa phem uas ua rau muaj kev phom sij rau ob tus neeg koom nrog hauv cov txheej txheem thiab ib puag ncig tag nrho. Cov kev txhawj xeeb no tau coj cov tuam txhab ua npuas ncauj thiab cov neeg hloov pauv mus nrhiav txoj hauv kev tshiab los tswj cov khoom ntim ntau ntawm cov npuas npuas uas tau tsim txhua xyoo.
Cov khoom ua npuas ncauj puas tuaj yeem siv dua?
Nrhiav txoj hauv kev tshiab yog qhov zoo dua, thiab haum rau cov kev xav niaj hnub no ntawm kev rov ua dua tag nrho peb cov khoom seem; Tab sis rau hnub tim, tsuas yog siv volumetric rau cov khoom ua npuas ncauj yog reconstituted ua npuas ncauj, txwv tsis pub hu ua chipfoam.
Qhov no yog qhov tseem ceeb ntawm cov txheej txheem ntawm granulating ua npuas ncauj rau hauv me me ntawm ob peb millimeters loj, rov khi lawv rau hauv daim ntawv loj loj, uas yog tom qab ntawd compressed rau ntau qhov ntom. Daim ntawv thov rau chipfoam suav nrog ntim, hauv pem teb lev, lub suab nqus vaj huam sib luag, tab sis qhov tseem ceeb yog siv cov ntaub pua plag hauv qab.
Cov neeg tsim khoom ntawm cov ntaub pua plag hauv qab yog, yog li ntawd, tau tsav los ntawm kev xav tau rau lawv cov nroj tsuag kom tau ntau li ntau tau ua npuas ncauj. Tau ntau xyoo, cov nroj tsuag no tau tsim txoj hauv kev zoo los khaws cov khoom seem los ntawm cov tshuab ua npuas dej thoob ntiaj teb thiab xa rov qab mus rau lawv cov chaw tsim khoom hauv qab. Qhov no ua rau txo qhov ntim ntawm seem seem kom muab pov tseg ntawm lwm txoj hauv kev.
Cov khib nyiab tseem raug xa mus rau qhov chaw pov tseg
Txawm hais tias cov txheej txheem chipfoam siv ntau cov khoom seem, nws feem ntau xav tau cov khoom siv 'virgin'. Qhov no txhais tau hais tias yog cov npuas dej tau laminated rau cov ntaub los yog cov nplaum nplaum, nws feem ntau yog siv tsis tau rau cov ntaub pua plag hauv qab.
Cov teeb meem tib yam siv rau kaw-cell polyethylene ua npuas ncauj. Ntxiv dua thiab, cov khoom seem yog sau los ntawm cov hloov pauv thiab coj rov qab mus rau qhov chaw tsim khoom uas nws tau granulated. Qhov no yog tom qab ntawd siv los tsim cov khoom xws li hauv pem teb lev thiab chaw ua si lev. Txawm li cas los xij, scrap polyethylene ua npuas ncauj uas tau raug rau cov txheej txheem hloov dua siab tshiab tsis tuaj yeem rov ua dua thiab yuav tsum tau muab pov tseg ntawm kev siv lwm txoj hauv kev.
Yog li, yuav ua li cas rau tag nrho cov khib nyiab uas tsis tuaj yeem siv dua? Kuj tseem muaj cov plua plav polyurethane, thaiv cov tawv nqaij thiab lwm yam khoom siv los ntawm cov txheej txheem hloov dua siab tshiab los xav txog. Peb paub tias kev kub hnyiab yog qhov phom sij yog li, qhov tseeb, qhov chaw pov tseg tseem yog qhov kev xaiv uas tseem tshuav.
Ob hom Ecuadorian fungus Pestalotiopsis muaj peev xwm ntawm bio-degrading polyurethane nyob rau hauv aerobic thiab anaerobic tej yam kev mob, xws li cov uas muaj nyob rau hauv qab ntawm landfills. Txawm li cas los xij, cov txheej txheem no yuav siv sij hawm ntau pua xyoo thiab kev tshawb fawb txog niaj hnub no tsis tau txiav txim siab yuav ua li cas txhawm rau txhim kho cov txheej txheem degradation.
Dab tsi ntxiv rau kev lag luam?
Lub sijhawm nws siv rau cov khoom ua npuas ncauj kom degrade tsim ib qho kev sib tw loj rau kev lag luam ua npuas ncauj thiab tseem rau cov neeg siv khoom uas saib xyuas lawv ib puag ncig. Peb pom thiab ntsib ua npuas ncauj txhua hnub, thiab peb qhov kev cia siab ntawm cov khoom siv ntau yam no ua rau nws tsis zoo li tias cov nqi tsim khoom yuav qeeb txhua lub sijhawm sai sai.
