Nyob rau hauv xyoo tsis ntev los no, lub ntiaj teb no tseem ceeb rau sustainability tau txuas mus rau hauv lub ntim kev lag luam. Cov yeeb yaj kiab yas qub, xws li PET (Polyethylene Terephthalate), tau ua tiav ntev vim lawv cov kav ntev thiab ntau yam. Txawm li cas los xij, kev txhawj xeeb txog lawv qhov kev cuam tshuam ib puag ncig tau ua rau muaj kev txaus siab raubiodegradable zaj duab xisLwm txoj hauv kev zoo li Cellophane thiab PLA (Polylactic Acid). Tsab ntawv xov xwm no nthuav tawm cov kev sib piv zoo ntawm cov yeeb yaj kiab biodegradable thiab cov yeeb yaj kiab PET ib txwm, tsom mus rau lawv cov muaj pes tsawg leeg, kev cuam tshuam ib puag ncig, kev ua tau zoo, thiab cov nqi.
Cov khoom siv thiab qhov chaw
Tsob Ntoo PET Zaj Duab Xis
PET yog cov khoom siv hluavtaws ua los ntawm cov polymerization ntawm ethylene glycol thiab terephthalic acid, ob qho tib si yog muab los ntawm cov roj crude. Raws li cov khoom siv uas tso siab rau tag nrho cov fossil fuels uas tsis tuaj yeem txuas ntxiv dua tshiab, nws cov khoom tsim tau siv zog heev thiab pab txhawb rau cov pa roj carbon emissions thoob ntiaj teb.
Biodegradable Zaj duab xis
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✅ Cellophane zaj duab xis:Cellophane zaj duab xisyog biopolymer zaj duab xis ua los ntawm regenerated cellulose, feem ntau yog los ntawm ntoo pulp. Cov khoom siv no yog tsim los siv cov khoom siv txuas ntxiv dua tshiab xws li ntoo lossis xyoob, uas ua rau nws qhov profile ruaj khov. Cov txheej txheem tsim khoom suav nrog kev sib cais cellulose hauv cov tshuaj alkali thiab carbon disulfide los tsim cov tshuaj viscose. Cov tshuaj no ces extruded los ntawm ib tug nyias slit thiab regenerated rau hauv ib zaj duab xis. Txawm hais tias txoj kev no yog siv zog nruab nrab thiab ib txwm muaj kev siv tshuaj lom neeg, cov txheej txheem tsim khoom tshiab tau tsim los txo cov kev cuam tshuam ib puag ncig thiab txhim kho tag nrho kev ruaj ntseg ntawm cellophane ntau lawm.
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✅PLA zaj duab xis:PLA zaj duab xis(Polylactic Acid) yog ib qho thermoplastic biopolymer muab los ntawm lactic acid, uas tau los ntawm cov khoom siv txuas ntxiv dua tshiab xws li pob kws hmoov txhuv nplej siab lossis qab zib. Cov khoom siv no tau lees paub tias yog lwm txoj hauv kev rau cov khoom siv niaj hnub vim nws tso siab rau cov khoom noj ua liaj ua teb es tsis yog fossil fuels. Kev tsim cov PLA suav nrog cov fermentation ntawm cov nroj tsuag cov suab thaj los tsim cov lactic acid, uas yog tom qab ntawd polymerized los ua biopolymer. Cov txheej txheem no siv cov roj fossil tsawg dua piv rau kev tsim cov roj av-raws li plastics, ua rau PLA yog ib qho kev xaiv zoo rau ib puag ncig.
Environmental Impact
Biodegradability
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Cellophane: Tag nrho biodegradable thiab compostable nyob rau hauv tsev los yog industrial composting tej yam kev mob, feem ntau degrading nyob rau hauv 30-90 hnub.
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PLA: Biodegradable nyob rau hauv industrial composting tej yam kev mob (≥58 ° C thiab high humidity), feem ntau nyob rau hauv 12-24 lub lis piam. Tsis biodegradable nyob rau hauv marine los yog ib puag ncig ntuj.
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PET: Tsis biodegradable. tuaj yeem nyob hauv ib puag ncig rau 400-500 xyoo, ua rau muaj kuab paug rau cov yas mus ntev.
Carbon Footprint
- Cellophane: Lub neej voj voog emissions muaj li ntawm 2.5 txog 3.5 kg CO₂ ib kg ntawm zaj duab xis, nyob ntawm txoj kev tsim khoom.
- PLA: Ua tau kwv yees li 1.3 txog 1.8 kg CO₂ ib kg ntawm zaj duab xis, txo qis dua li cov yas yas.
- PET: Feem ntau emissions muaj li ntawm 2.8 mus rau 4.0 kg CO₂ ib kg ntawm zaj duab xis vim fossil roj siv thiab siab zog noj.
Rov ua dua
- Cellophane: Technically recyclable, tab sis feem ntau composted vim nws biodegradability.
- PLA: Rov ua dua tshiab hauv cov chaw tshwj xeeb, txawm hais tias kev tsim kho hauv ntiaj teb tiag tiag txwv. Feem ntau PLA xaus rau hauv qhov chaw pov tseg lossis kev tua hluav taws.
- PET: Siv dav dav thiab lees txais hauv cov kev pabcuam hauv nroog. Txawm li cas los xij, cov nqi rov qab thoob ntiaj teb tseem qis (~ 20-30%), tsuas yog 26% ntawm PET lub raj mis rov ua dua hauv Asmeskas (2022).
Kev ua tau zoo thiab khoom
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Flexibility thiab muaj zog
Cellophane
Cellophane nthuav tawm qhov ua tau zoo thiab tsim kua muag tsis zoo, ua rau nws tsim nyog rau kev ntim cov ntawv thov uas xav tau qhov sib npaug ntawm cov qauv kev ntseeg siab thiab yooj yim ntawm kev qhib. Nws lub zog tensile feem ntau yog los ntawm100-150 MPa, nyob ntawm cov txheej txheem tsim khoom thiab seb nws puas yog coated rau kev txhim kho cov khoom thaiv. Thaum tsis muaj zog li PET, cellophane lub peev xwm los khoov yam tsis muaj kev tawg thiab nws lub ntuj xav ua rau nws zoo tagnrho rau qhwv cov khoom hnyav thiab muag zoo li cov khoom ci thiab khoom qab zib.
PLA (Polylactic Acid)
PLA muab lub zog zoo txhua yam, nrog lub zog tensile feem ntau ntawm50-70 MPa, uas yog piv rau qee cov khoom siv yas. Txawm li cas los xij, nwsbrittlenessyog qhov teeb meem tseem ceeb - nyob rau hauv kev ntxhov siab lossis qhov kub thiab txias, PLA tuaj yeem tawg lossis tawg, ua rau nws tsis haum rau cov ntawv thov uas yuav tsum muaj kev cuam tshuam loj. Cov khoom siv ntxiv thiab sib xyaw nrog lwm cov polymers tuaj yeem txhim kho PLA lub zog, tab sis qhov no yuav cuam tshuam rau nws cov compostability.
PET (Polyethylene Terephthalate)
PET yog dav saib rau nws cov khoom siv kho tshuab zoo heev. Nws muaj lub zog tensile siab-xws li50 mus rau 150 MPa, nyob ntawm tej yam xws li qib, thickness, thiab cov txheej txheem ua (xws li, biaxial orientation). PET kev sib xyaw ua ke ntawm kev ua kom yooj yim, ua haujlwm ntev, thiab tiv thaiv kev sib tsoo thiab tsim kua muag ua rau nws nyiam cov khoom siv rau lub raj mis haus, tais, thiab ntim khoom ua haujlwm siab. Nws ua tau zoo thoob plaws qhov kub thiab txias, tswj kev ncaj ncees thaum muaj kev ntxhov siab thiab thaum thauj.
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Barrier Properties
Cellophane
Cellophane muajnruab nrab barrier zogtiv thaiv gases thiab ya raws. Nwsoxygen kis tus nqi (OTR)feem ntau yog nyob ntawm500-1200 cm³ / m² / hnub, uas tsim nyog rau cov khoom lag luam luv luv xws li cov khoom tshiab lossis cov khoom ci. Thaum coated (piv txwv li, nrog PVDC los yog nitrocellulose), nws txoj kev ua haujlwm tsis zoo tuaj yeem txhim kho. Txawm hais tias nws yog permeable ntau dua li PET lossis txawm tias PLA, cellophane lub ntuj ua pa tuaj yeem ua tau zoo rau cov khoom uas xav tau qee qhov kev hloov pauv dej.
PLA
PLA zaj duab xis muajzoo noo noo tsis kam tshaj cellophanetab sis muajsiab dua oxygen permeabilitytshaj PET. Nws OTR feem ntau poob ntawm100-200 cm³ / m² / hnub, nyob ntawm zaj duab xis thickness thiab crystallinity. Txawm hais tias tsis zoo rau kev siv cov pa oxygen (xws li cov dej haus carbonated), PLA ua tau zoo rau ntim cov txiv hmab txiv ntoo tshiab, zaub, thiab zaub mov qhuav. Cov txheej txheem PLA tshiab tau tsim los txhim kho kev ua tau zoo hauv cov ntawv thov ntau dua.
PET
PET muabsuperior barrier zoghla lub rooj tsavxwm. Nrog OTR tsawg li tsawg1-15 cm³ / m² / hnub, nws yog tshwj xeeb tshaj yog zoo ntawm kev thaiv cov pa oxygen thiab noo noo, ua rau nws zoo tagnrho rau cov khoom noj thiab dej ntim ntim uas lub txee lub neej ntev yog qhov tseem ceeb. PET lub peev xwm barrier kuj pab tswj cov khoom tsw, carbonation, thiab freshness, uas yog vim li cas nws dominates lub raj mis dej haus sector.
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Pob tshab
Tag nrho peb cov khoom -Cellophane, PLA, thiab PET—kevzoo heev optical clarity, ua rau lawv haum rau ntim khoom qhov twgkev nthuav qhia pomyog qhov tseem ceeb.
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Cellophanemuaj lub ntsej muag glossy thiab lub ntuj xav, feem ntau txhim kho kev nkag siab ntawm cov kws ua haujlwm lossis cov khoom siv hauv eco.
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PLAyog pob tshab heev thiab muab ib tug du, glossy tiav, zoo ib yam li PET, uas txaus siab rau cov hom uas muaj nuj nqis rau kev nthuav qhia pom kev zoo thiab kev ruaj khov.
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PETtseem yog cov qauv kev lag luam rau kev pom tseeb, tshwj xeeb tshaj yog nyob rau hauv cov ntawv thov xws li cov fwj dej thiab cov thawv ntim khoom noj kom pom tseeb, qhov kev pom tseeb yog qhov tseem ceeb rau kev nthuav tawm cov khoom zoo.
Kev siv tswv yim
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Ntim Cov Khoom Noj
Cellophane: Feem ntau siv rau cov khoom tshiab, cov khoom bakery rau khoom plig, xws licellophane hnab khoom plig, thiab confectionery vim breathability thiab biodegradability.
PLA: Kev siv ntau ntxiv hauv cov thawv clamshell, tsim cov yeeb yaj kiab, thiab ntim cov khoom noj siv mis vim nws qhov tseeb thiab kev ua kom zoo, xws liPLA zaj duab xis.
PET: Cov txheej txheem kev lag luam rau lub raj mis haus, cov tais ntim khoom noj khov, thiab ntau lub thawv, khoom plig rau nws lub zog thiab kev ua haujlwm tsis zoo.
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Kev siv tshuab
Cellophane: Pom muaj nyob rau hauv daim ntawv thov tshwj xeeb xws li luam yeeb qhwv, ntim tshuaj blister, thiab khoom plig qhwv.
PLA: Siv nyob rau hauv kev kho mob ntim, ua liaj ua teb zaj duab xis, thiab nce nyob rau hauv 3D printing filaments.
PET: Kev siv dav hauv cov khoom ntim khoom, cov khoom siv tsheb, thiab cov khoom siv hluav taws xob vim nws lub zog thiab tshuaj lom neeg.
Kev xaiv ntawm cov kev xaiv biodegradable xws li Cellophane thiab PLA lossis cov yeeb yaj kiab PET ib txwm nyob ntawm ntau yam xws li ib puag ncig ua ntej, kev xav tau kev ua haujlwm, thiab kev txwv nyiaj txiag. Thaum PET tseem tseem ceeb vim tus nqi qis thiab cov khoom zoo heev, lub nra ntawm ib puag ncig thiab kev xav ntawm cov neeg siv khoom tau tsav kev hloov mus rau cov yeeb yaj kiab biodegradable. Cellophane thiab PLA muab cov txiaj ntsig zoo ntawm ecological thiab tuaj yeem txhim kho cov duab zoo nkauj, tshwj xeeb tshaj yog hauv kev lag luam eco-conscious. Rau cov tuam txhab uas tab tom nrhiav kom nyob ua ntej ntawm cov qauv kev ruaj ntseg, kev nqis peev hauv cov kev xaiv no tuaj yeem yog ob qho tib si lub luag haujlwm thiab kev tawm tswv yim.
Yam khoom
Post lub sij hawm: Jun-03-2025