"Renewable" thiab "recyclable" yog ob qho tseem ceeb tab sis feem ntau tsis meej pem lub ntsiab lus hauv kev tiv thaiv ib puag ncig. Thaum nws los txog rau PU tawv, ib puag ncig txoj hauv kev thiab lub neej voj voog yog txawv kiag li.
Txhawm rau kom ua tiav, Kev Tsim Kho Tshiab tau tsom mus rau "cov khoom siv raw" - qhov twg nws los ntawm thiab seb nws puas tuaj yeem ntxiv ntxiv ntxiv. Recyclable tsom mus rau "cov khoom kawg ntawm lub neej" - seb nws puas tuaj yeem rov ua dua tshiab rau hauv cov ntaub ntawv raw tom qab pov tseg.Tam sim no peb yuav nkag mus rau hauv kev nthuav dav ntxiv txog qhov sib txawv ntawm ob lub tswv yim no thaum lawv siv rau PU tawv.
1. Rov ua dua PU tawv (bio-based PU tawv).
• Nws yog dab tsi?
'Bio-raws li PU tawv' yog lub ntsiab lus tseeb dua rau cov tawv PU txuas ntxiv. Nws tsis tau txhais hais tias tag nrho cov khoom yog tsim los ntawm cov khoom siv roj ntsha. Hloov chaw, nws hais txog qhov tseeb tias qee yam ntawm cov khoom siv tshuaj siv los tsim cov polyurethane los ntawm biomass tauj dua tshiab dua li cov roj av tsis muaj dua tshiab.
• Yuav ua li cas ' tauj dua tshiab' ua tiav?
Piv txwv li, cov suab thaj los ntawm cov nroj tsuag xws li pob kws los yog qab zib yog fermented siv technology los tsim bio-based chemical intermediates, xws li propylene glycol. Tom qab ntawd cov intermediates yog synthesized rau hauv polyurethane. Qhov tshwm sim PU tawv muaj qee qhov kev faib ua feem ntawm 'bio-based carbon'. Qhov feem pua ntawm qhov sib txawv: cov khoom lag luam hauv khw muaj li ntawm 20% txog 60% bio-based cov ntsiab lus, nyob ntawm cov ntawv pov thawj tshwj xeeb.
2. Recyclable PU tawv
• Nws yog dab tsi?
Recyclable PU tawv yog hais txog PU cov ntaub ntawv uas tuaj yeem rov qab los ntawm lub cev lossis tshuaj siv tom qab muab pov tseg thiab rov siv dua los tsim cov khoom tshiab.
• “Recyclability” ua tiav li cas?
Lub cev rov ua dua tshiab: PU cov khib nyiab yog crushed thiab hauv av rau hauv cov hmoov, ces sib tov ua muab tub lim rau hauv PU tshiab los yog lwm yam ntaub ntawv. Txawm li cas los xij, qhov no feem ntau degrades cov khoom siv thiab suav tias yog kev rov ua dua tshiab.
Kev Siv Tshuaj Siv Tshuaj: Los ntawm kev siv tshuaj lom neeg depolymerization, PU cov saw ntev molecules tau tawg rau hauv cov khoom qub lossis cov tshuaj tshiab xws li polyols. Cov tshuaj no tuaj yeem siv tau zoo li cov ntaub ntawv nkauj xwb los tsim cov khoom zoo PU. Qhov no sawv cev rau ib daim ntawv zoo dua ntawm kev kaw-voj rov ua dua tshiab.
Kev sib raug zoo ntawm ob: Tsis sib koom ua ke, tuaj yeem ua ke
Cov khoom siv zoo tshaj plaws hauv eco-phooj ywg muaj ob qho tib si "sib txuas ntxiv" thiab "rov ua dua tshiab" cov yam ntxwv. Qhov tseeb, thev naus laus zis tau nce mus rau qhov kev coj ua no.
Scenario 1: Ib txwm siv (tsis yog rov ua dua tshiab) Tsis tau rov ua dua tshiab
Tsim los siv roj av-raws li raw khoom tab sis engineered rau chemical recycling. Qhov no piav qhia txog lub xeev tam sim no ntawm ntau "cov tawv PU rov ua dua tshiab."
Scenario 2: Rov qab ua dua tab sis tsis rov ua dua
Ua los ntawm cov khoom siv bio-raws li raw khoom, tab sis cov qauv tsim khoom ua rau cov khoom siv rov ua haujlwm nyuaj. Piv txwv li, nws ruaj khov rau lwm cov ntaub ntawv, ua rau kev sib cais nyuaj.
Scenario 3: Rov ua dua thiab rov ua dua tshiab (Ideal State)
Ua los ntawm bio-raws li raw cov ntaub ntawv thiab tsim kom yooj yim recycling. Piv txwv li, ib qho khoom siv thermoplastic PU ua los ntawm bio-based feedstocks txo cov pob txha siv thaum nkag mus rau hauv lub voj voog rov qab tom qab pov tseg. Qhov no sawv cev rau qhov tseeb "Cradle rau Cradle" paradigm.
Summary and Selection Recommendations:
Thaum koj xaiv, koj tuaj yeem txiav txim siab raws li koj qhov kev nyiam ib puag ncig:
Yog tias koj muaj kev txhawj xeeb ntau ntxiv txog kev txo cov roj fossil siv thiab cov pa hluav taws xob hauv tsev cog khoom, koj yuav tsum tsom mus rau "txuas ntxiv / bio-based PU tawv" thiab xyuas nws cov ntaub ntawv pov thawj bio-based.
Yog tias koj txhawj xeeb txog kev cuam tshuam ib puag ncig thaum kawg ntawm cov khoom lag luam lub neej thiab tsis txhob muab pov tseg, koj yuav tsum xaiv "PU tawv" thiab nkag siab txog nws txoj hauv kev rov ua dua tshiab thiab ua tau.
Qhov kev xaiv zoo tshaj plaws yog nrhiav cov khoom lag luam uas muab ob qho tib si bio-based cov ntsiab lus thiab cov txheej txheem rov ua dua tshiab, txawm tias cov kev xaiv no tseem tsis tshua muaj nyob hauv kev ua lag luam tam sim no.
Vam tias, qhov kev piav qhia no yuav pab koj kom paub qhov txawv ntawm ob lub ntsiab lus tseem ceeb no.
Post lub sij hawm: Oct-31-2025
