Nyob rau hauv lub neej niaj hnub no sai sai -paced, haus dej haushaus ntawv khobtau dhau los ua qhov tsim nyog. Nrog rau kev paub txog ib puag ncig thiab cov cai nruj dua, kev xaiv ntawm cov khoom siv khob haus dej tsis yog tsuas yog cuam tshuam rau kev ua tau zoo tab sis kuj cuam tshuam rau lub tuam txhab kev txhim kho kom ruaj khov. PET (polyethylene terephthalate) thiab PP (polypropylene), raws li cov khoom siv yas haus cov ntawv khob, txhua tus muaj lawv qhov zoo hauv cov dej txias thiab kub. Txoj kev tshawb no sib piv lawv los ntawm plaub qhov tseem ceeb: cov khoom siv, cov nqi tsim khoom, kev siv hauv kev lag luam, thiab kev ua haujlwm ib puag ncig, muab kev tshawb fawb rau cov tuam txhab xaiv cov khoom lag luam, kev txiav txim siab peev, thiab kev npaj tswv yim.
I. Kev txheeb xyuas cov khoom vaj khoom tsev sib piv
Qhov sib txawv ntawm cov khoom siv ntawm PET thiab PP ncaj qha txiav txim siab lawv daim ntawv thov scenarios. Qhov sib txawv tseem ceeb yog nyob rau hauv qhov kub thiab txias adaptability, zoo li, kev ua tau zoo, ceev, thiab mechanical barrier zog.
1.1 Temperature Adaptability: Complementarity ntawm Kub thiab txias Resistance
Hais txog kev tiv thaiv tshav kub, PET muaj qhov melting point ntawm 250-260 degree, tab sis nws cov iav hloov pauv kub tsuas yog 70-80 degree, txwv nws qhov kub ntawm kev siv kom qis dua 60-70 degree. Tshaj qhov kub no tuaj yeem yooj yim ua rau deformation lossis tso tawm cov khoom tsis zoo, ua rau nws tsuas yog tsim nyog rau cov dej txias thiab chav dej kub. PP muaj qhov melting point ntawm 160-170 degree, qis dua tus tsiaj, tab sis nws qhov kub thiab txias siv tau mus txog 110-120 degree, thiab nws tuaj yeem tiv taus lub sijhawm luv luv ntawm 150 degree. Nws yuav tsis deform nyob rau hauv ib qho kev quab yuam sab nraud, ua rau nws yog qhov kev xaiv tseem ceeb rau kev ntim dej kub.
Hais txog kev ua haujlwm txias, PET ua tau zoo heev, tiv taus qhov kub tsis tshua muaj siab ntawm -70℃thiab tswj kev ruaj khov txawm tias nyob hauv qhov chaw khov, ua rau nws tsim nyog rau kev xa khoom txias. Txawm li cas los xij, nws lub zog qis qis qis dua 0 degree, thiab nws qhov cuam tshuam lub zog poob los ntawm 40% -50% ntawm -20 degree, nrog lub brittleness kub ntawm -40℃rau -50 degree. PP muaj qhov tsis muaj zog tiv thaiv txias, nrog lub iav hloov pauv kub ntawm -13 txog -1 degree. Nws lub zog cuam tshuam ntawm 0℃tsuas yog ib nrab ntawm 20 degree, thiab nws maj mam ua rau qis dua 20 degree. Unmodified homopolymer PP muaj kev txwv tsis pub siv nyob rau hauv qhov chaw qis qis.
1.2 Cov tsos thiab lub cev muaj zog: Kev lag luam -tawm ntawm Transparency thiab Lightweighting
Transparency yog qhov tseem ceeb cuam tshuam rau kev txiav txim siab ntawm cov neeg siv khoom. PET muaj iav - theem pob tshab thiab gloss, qhia meej meej qhia cov xim dej haus thiab thaiv cov kab hluav taws xob ultraviolet, ua rau nws tsim nyog rau ntim cov xwm txheej uas xav tau kev pom zoo. PP feem ntau yog translucent los yog opaque. Txawm hais tias qhov no tuaj yeem txhim kho nrog cov tshuaj tiv thaiv- cov tshuaj tiv thaiv, nws tsis tuaj yeem ncav cuag qib PET. Nws cov tsos yog dawb thiab waxy, tab sis nws rigidity thiab qaug zog kuj zoo heev; hinges tuaj yeem tiv taus ntau dua 70 lab folds, ua rau nws haum rau flip- sab saum toj lossis ntim ntim tsim.
Qhov sib txawv ntawm qhov sib txawv ua rau tus nqi thiab kev siv tau zoo: PET muaj qhov ceev ntawm 1.31-1.38 g / cm³, thaum PP muaj qhov ntom ntawm 0.90-0.91 g / cm³, ua rau nws yog ib qho ntawm cov yas qis tshaj plaws. Nrog tib qhov hnyav ntawm cov khoom siv raw, PP tuaj yeem tsim ntau cov khoom ntawm tib lub ntim, thiab covhaus ntawv khobyog sib dua, txo cov nqi tsev thiab kev siv hluav taws xob thauj mus los, uas yog qhov tseem ceeb tshwj xeeb rau kev thauj mus los loj los ntawm cov khw muag khoom loj.
ntshiab lub thawv noj su
pov tseg tog phaj
kev cai ntawv khob
Clamshell Cov Khoom Noj Khoom Haus
1.3 Mechanical thiab Barrier Properties: Qhov txawv ntawm Rigidity, Toughness, thiab Preservation Capacity
Hais txog cov khoom siv kho tshuab, PET muaj cov txiaj ntsig tseem ceeb, nrog lub zog tensile ntawm 140-160 MPa, lub zog flexural ntawm 70-100 MPa, thiab cov qib toughness ntawm cov thermoplastics sab saum toj. Nws kuj pom zoo heev qaug zog tiv thaiv, abrasion tsis kam, thiab seem stability. PP muaj cov khoom siv qis dua me ntsis, nrog lub zog tensile ntawm 30.0-39.0 MPa thiab flexural zog ntawm 42.0-56.0 MPa, tab sis nws elongation ntawm tawg yog 200-400%, deb tshaj PET's 50-150%, thiab nws muaj zog zog thiab tsis kam mus deformation. Nyob rau hauv chav tsev kub, PET muaj kev cuam tshuam lub zog ntawm 3-5 kJ / m², thaum PP ua tau zoo. Txawm li cas los xij, PP qhov kev cuam tshuam kev ua tau zoo poob qis ntawm qhov kub thiab txias.
Cov khoom pov thawj txiav txim siab lub neej txee dej haus: PET muaj cov dej vapor kis tus nqi ntawm<1g/(m²·24h) and an oxygen transmission rate of <5cm³/(m²·24h·0.1MPa), making its oxygen barrier capacity three times that of PP. It is suitable for carbonated beverages, juices, and other products requiring long-term preservation. PP has a water vapor transmission rate of <2g/(m²·24h) but an oxygen transmission rate exceeding 100cm³/(m²·24h·0.1MPa), requiring EVOH lamination or aluminum foil to improve barrier properties, making it more suitable for short-term hot beverages.
1.4 Chemical Stability: Food Safety and Environmental Tolerance
Ob qho tib si yog cov khoom siv tiv thaiv zaub mov zoo. PP nthuav tawm cov tshuaj lom neeg ruaj khov zoo, tiv taus cov kua qaub, alkalis, roj, thiab cov kuab tshuaj organic feem ntau tshwj tsis yog cov concentrated sulfuric acid thiab nitric acid. Nws siab - qhov kub thiab txias ua rau nws tsuas yog cov yas pom zoo rau kev siv microwave. PET tiv taus cov kua qaub tsis muaj zog thiab cov kuab tshuaj organic tab sis tsis yog rau cov dej kub immersion thiab muaj zog alkalis. Nws tuaj yeem hydrolyze nyob rau hauv qhov kub thiab txias, tab sis tseem muaj kev nyab xeeb thiab ruaj khov ntawm chav tsev kub, ua rau nws haum rau cov dej haus thiab ntim khoom noj.
II. Kev Ntsuas Tus Nqi Ntau Lawm
Cov nqi tsim khoom yog txiav txim siab los ntawm cov khoom siv raw, kev ua, kev siv hluav taws xob, thiab kev lag luam ntawm nplai. PP muaj qhov txiaj ntsig zoo ntawm tus nqi tag nrho, thaum PET qhia tau tias muaj peev xwm rau kev sib faib cov nqi hauv cov khoom loj -.
2.1 Raw Material Prices
Raws li 2025 cov ntaub ntawv ua lag luam, tus nqi ntau ntawm PET raw khoom yog 5812-11000 yuan / ton, nrog lub raj mis- qib chips ntawm 6300-6400 yuan / tuj thiab zaub mov qib granules ntawm 6500-8500 yuan / ton. Tus nqi lag luam thoob ntiaj teb hauv North America thaum Lub Rau Hli yog kwv yees li 8000 yuan / ton, qhia tag nrho kev ruaj ntseg nrog kev hloov pauv me ntsis vim cov nqi roj thoob ntiaj teb.
PP muaj tus nqi sib tw ntau dua. Virgin PP yog tus nqi ntawm 7800-9200 yuan/ton, thaum siv PP tsuas yog 4000-6000 yuan/ton. Tus nqi hloov pauv tseem ceeb rau qib fiber ntau PP yog 7020-7200 yuan / ton, nrog tus nqi nruab nrab txhua xyoo nyob rau sab hnub tuaj Tuam Tshoj ntawm 7144 yuan / ton, txo qis dua 5% piv rau xyoo tas los. Thaum kawg ntawm Lub Kaum Hli, qhov chaw tus nqi qis li 6585 yuan / tuj, qhia txog kev poob qis, thiab tus nqi kom zoo dua ntxiv mus.
2.2 Cov nqi ua haujlwm thiab cov nqi hluav taws xob
Hais txog cov khoom siv thiab cov nqi pwm, cov cuab yeej txhaj tshuaj molding (tsim nyog rau cov ntawv khob haus cov duab) raug nqi ntau pua txhiab txog lab yuan, thaum pwm raug nqi ntau txhiab mus rau lab yuan. Tshuab moulding khoom raug nqi kaum tawm txhiab mus rau ntau pua txhiab yuan, thaum pwm tsuas raug nqi ob peb txhiab mus rau kaum txhiab yuan. PET yog ua tiav los ntawm tshuab molding, uas yog 25% ntau npaum li PP. PP txheej txheem kub yog 220-280 degree, qis dua PET's 280 degree, thiab tsis tas yuav tsum tau ua ntej ziab, ua rau qis zog noj, uas tuaj yeem cuam tshuam qee qhov kev ua haujlwm tsis zoo.
Tus nqi sib txawv ntawm ib khob ntawv haus yog qhov tseem ceeb: 500ml PET haus khob ntawv tus nqi kwv yees li 0.18 yuan, thaum lub khob haus PP tsuas yog 0.1 yuan. The core reason is that PP has lower density, lower raw material costs, and lower processing energy consumption. Hauv tshuab molding cov txheej txheem uas cov khoom siv raw cov nqi suav txog 50% -70%, tus nqi ntawm PP raw cov ntaub ntawv yog 8500-12500 yuan / tuj, qis dua PET's 9500-14000 yuan / tuj.
2.3 Economies of Scale
PET ntau lawm nthuav tawm qhov kev lag luam tseem ceeb ntawm nplai. Thaum lub tshuab ua tiav cov kab ntau lawm yuav tsum tau pib nqis peev ntawm kaum tawm lab yuan, tus nqi depreciation ib lub raj mis tuaj yeem txo los ntawm 90% thaum cov khoom tsim tawm txhua xyoo nce los ntawm 100 lab mus rau 1 billion units. Tuam Tshoj, raws li lub ntiaj teb no tus loj tshaj plaws PET lub raj mis tsim, yuav suav rau 36.2% ntawm lub ntiaj teb no muaj peev xwm nyob rau hauv 2024, nrog Zhejiang, Guangdong, thiab Jiangsu xeev pab txhawb tshaj 52% ntawm lub peev xwm. Qhov kev lag luam kev lag luam no ntxiv txo cov nqi. Thaum PP kuj tseem nyiam kev yuav khoom ntau, nws cov cuab yeej siv peev txheej qis dua, ua rau muaj kev lag luam me me ntawm qhov ntsuas.
III. Kev Tshawb Fawb Kev Ua Lag Luam
PET thiab PP tau tsim kev lag luam faib raws li lawv cov khoom sib txawv. PET dominates lub lag luam dej txias, thaum PP monopolizes lub lag luam kub dej haus. Cov kev nyiam hauv cheeb tsam thiab ib puag ncig kev nyiam ua rau kev hloov pauv ntawm cov qauv kev lag luam.
3.1 Core Application Scenarios
PET dej txiashaus ntawv khobfeem ntau yog siv los ntim cov tshuaj yej tshiab, kas fes, dej haus carbonated, kua txiv hmab txiv ntoo, thiab khoom noj siv mis. Hauv xyoo 2023, Suav cov yas yas txias haus cov khob khob ua lag luam tau txog 21.8 billion yuan, ib xyoos - ntawm - xyoo nce ntawm 9.7%, nrog rau cov tuam txhab tsim khoom lag luam suav txog 58% ntawm kev lag luam. Mixue Ice Cream tau yuav ntau dua 3.65 billion tus dej txias haus khob khob hauv xyoo 2024, suav txog 41.1% ntawm cov khw muag khoom noj khoom haus. Nws cov pob tshab siab thiab cov khoom thaiv muaj peev xwm tuaj yeem nthuav tawm cov kev ntxhib los mos ntawm cov dej haus, ua kom lub neej ntev, thiab ua tau raws li cov kev xav tau ntawm cov saw hlau txias.
PP lub khob haus dej haus cawv yog siv rau hauv kas fes chains, tshuaj yej khw, thiab rau ntim cov dej qab zib thiab khoom noj khoom haus. Portable kas fes haus ntawv khob hauv qab 500ml tus account rau 65% ntawm tag nrho cov muag khoom. Kev lag luam catering txhua xyoo xav tau yog kwv yees li 4.2 billion units, nrog rau cov khoom noj ceev thiab tshuaj yej cov lag luam suav txog 54% ntawm kev siv. Nws lub siab -kub tsis kam ua rau nws haum rau kas fes haus saum 80℃thiab tshuaj yej haus ntawm 60-80 degree, thiab nws kuj yog poob-resistant thiab rov siv tau, ua rau nws haum rau ob qho tib si hauv tsev thiab chaw ua haujlwm.
3.2 Kev Tshaj Tawm Kev Lag Luam thiab Kev nyiam hauv cheeb tsam
Nyob rau hauv lub ntiaj teb no txias haus khob khob ua lag luam, PE / PET cov ntaub ntawv account rau 58.2%, thiab PET thiab PP ua ke account rau 65.3% ntawm cov yas haus khob khob lag luam. Hauv xyoo 2024, cov khob haus dej yas ntim rau 52.7% ntawm Suav lag luam, nrog PP suav txog 52%, ua raws li PET; qhov sib koom ntawm biodegradable haus khob khob tau nce mus rau 18.9%, thiab PLA txoj kev loj hlob mus txog 37%, xav tias yuav tshaj 15% hauv 2026. Lub ntiaj teb PET haus khob khob lag luam yuav tsum tshaj US $ 10 nphom hauv 2025, nrog kev loj hlob ntawm 8% hauv Suav teb; qhov sib faib ntawm PP kas fes haus khob khob yuav tsum nce los ntawm 35% mus rau 40%.
Qhov sib txawv hauv cheeb tsam tseem ceeb muaj nyob: European thiab Asmeskas kev lag luam nyiam pob tshab khob khob ua los ntawm cov khoom siv rov ua dua tshiab (rPET), hais txog cov khoom lag luam; Asia- cheeb tsam Pacific yog cov neeg siv khoom lag luam loj tshaj plaws rau PET, nrog rau Tuam Tshoj, Is Nrias teb, thiab Cov Neeg Esxias Sab Qab Teb Sab Hnub Tuaj ua kom muaj kev loj hlob, thiab cov neeg tau txais kev pab hluas xav tau kom npaj tau- rau- haus dej tshuaj yej; Cov neeg Esxias sab hnub tuaj yog tus nqi -sensitive, qhia txog tus nqi kom zoo dua ntawm PP; Tuam Tshoj sab hnub tuaj thiab sab qab teb hauv Suav teb ua rau qhov kev thov rau cov khob haus dej txias, suav txog 31.5% thiab 24.8% feem, zoo ib yam nrog cov qauv ntawm cov saw hlau.
3.3 Txoj Kev Loj Hlob
Kev tiv thaiv ib puag ncig tau dhau los ua qhov tseem ceeb. Los ntawm 2025, tus nqi nkag ntawm bio-raws li cov ntaub ntawv hauv cov ntim dej txias yuav tsum ncav cuag 28%, PLA tus nqi hwm tus nqi zog yuav nce, thiab PET tus nqi tuaj yeem txo los ntawm 19% los ntawm kev rov ua dua. Kev siv cov khoom siv rov ua dua yog nrawm dua; Hauv xyoo 2024, lub khob haus dej txias nrog ntau dua lossis sib npaug li 30% rov ua dua tus tsiaj PET suav txog 42% ntawm kev ua lag luam, thiab "Kev Npaj Ua Haujlwm rau Kev Tswj Cov Plastics" xav kom cov ntsiab lus ntawm PET lub raj mis rov ua dua tsis pub tsawg dua 30% los ntawm 2025. Hais txog kev tsim kho tshiab, tshuaj lom neeg cov khoom siv rov ua dua tshiab {1} thiab kev ua kom zoo dua qub. kev hloov khoom dua tshiab yog tsav kev thov rau customized thiab siab-qhov kawg ntim, tau txais txiaj ntsig siab- zoo PET haus khob ntawv.
IV. Environmental Performance Comparison Analysis
Kev ua tau zoo ib puag ncig tsom rau kev rov ua dua tshiab, muaj peev xwm degradation, cuam tshuam rau lub neej, thiab txoj cai sib haum. PET muaj qhov zoo dua qub vim nws qhov zoo -tsim tsim cov txheej txheem rov ua dua tshiab, thaum PP ntsib cov khoom siv rov ua dua tshiab tab sis muaj peev xwm ua tau zoo.
4.1 Recycling Performance
PET tus nqi rov ua dua nyob deb tshaj li ntawm PP. Lub ntiaj teb qhov nruab nrab rov ua dua tus nqi yog 58%, nrog Tuam Tshoj tshaj 65%, thiab Tebchaws Europe thiab Tebchaws Meskas nyob ib ncig ntawm 50%. Nws muaj cov cai rov ua dua ntawm "1," zoo- tsim cov txheej txheem tsim kho, thiab cov khoom siv rov ua dua tuaj yeem siv rau lub raj mis, textiles, thiab lwm yam, nrog rau qee yam khoom uas muaj 30-50% cov ntaub ntawv rov ua dua tshiab. Tuam Tshoj tus PET yas rov ntim ntim tau kwv yees kom ncav cuag 16.5 lab tons los ntawm 2025, suav txog 36.7% ntawm tag nrho cov pov tseg yas rov ua dua tshiab.
PP tus nqi rov ua dua yog tsawg dua 10%, nrog rau cov lej rov ua dua ntawm "5." Nws raug kev txom nyem los ntawm kev sib xyaw ua paug hnyav, cov nqi txheeb xyuas siab, thiab tsis muaj zog rov ua dua tshiab. Cov khoom siv rov ua dua feem ntau yog siv rau cov khoom siv tsheb thiab cov thawv ntim khoom. Txawm hais tias yooj yim rau kev rov ua dua tshiab, kev sau tsis txaus thiab cov chaw ua haujlwm txwv tsis pub nws nce qib, thiab kev txhim kho yav tom ntej rau cov txheej txheem sorting yog xav tau.
4.2 Kev puas tsuaj thiab lub neej voj voog cuam tshuam
Tsis yog PET lossis PP yog biodegradable. PET molecules yog nruj nreem ntim thiab crystalline heev, yuav tsum tau 450 xyoo kom tiav degradation nyob rau hauv marine ib puag ncig. PP molecular chains yog nonpolar thiab ntom, ua rau lawv nyuaj rau cov kab mob kom decompose, nrog ntuj degradation noj ntau pua xyoo. Tsuas yog cov kab mob * Ideonella sakaiensis * tuaj yeem tso cov enzymes kom decompose PET, tab sis qhov no yog deb ntawm kev siv tswv yim.
Kev ntsuas lub neej qhia tau hais tias qhov kev puas tsuaj ib puag ncig ntawm cov khoom siv PET rov ua dua yog 34.5 mpt, nrog rau tib neeg kev noj qab haus huv cuam tshuam txog 91.3%. Virgin PET tso tawm 2.39 tons ntawm CO₂ / tuj, thaum cov khoom siv rov qab txo qhov no mus rau 1.15 tons, txo 50%, thiab txuag 75% ntawm lub zog. PP ntau lawm muaj kev siv zog ntau dua thiab cov pa roj carbon emissions, tab sis nws cov yam ntxwv sib zog tuaj yeem cuam tshuam qee qhov kev cuam tshuam ib puag ncig thaum thauj.
4.3 Txoj Cai thiab Txoj Cai Lij Choj
Txoj cai tau nce zuj zus. Tuam Tshoj yuav tsum tau txo 18% kev siv hluav taws xob rau PET ntau lawm los ntawm 2025, kev lag luam cov dej khib nyiab rov qab siv dua li 90%, thiab daim ntawv thov tus nqi ntawm cov khoom siv PET tau nce mus txog 30%, nce mus rau 45% los ntawm 2030. Ntau tshaj 60 lub teb chaws thoob ntiaj teb tau muab cov ntaub ntawv yas rov ua dua tshiab rau hauv lawv cov kev cai, nrog rau 20% EU tus nqi reccling.
Nyob rau hauv cov nqe lus ntawm kev txhim kho kom ruaj khov, PET, tso siab rau cov cuab yeej siv tshuaj lom neeg, ua tiav cov khoom siv rov ua dua tshiab ntawm 95.4%, ua kom nws cov txiaj ntsig zoo. PP yuav tsum kov yeej kev sau thiab txheeb cov fwj; chemical recycling thiab ua ke mechanical -chemical recycling technologies tab tom txhim kho. Kev nce ntawm bio-raws li cov ntaub ntawv nthuav tawm cov teeb meem, tab sis PET tus nqi kom zoo dua hauv kev rov ua dua tshiab thiab PP lub teeb yuag muaj peev xwm tseem muaj kev sib tw, ua rau kev lag luam ncig ib qho kev loj hlob tseem ceeb.
Los ntawm kev sib piv thoob plaws plaub qhov loj me, PET thiab PP nthuav tawm qhov sib txawv: PET, nrog nws cov pob tshab siab, cov khoom thaiv zoo heev, thiab qhov zoo tsis zoo -kub tsis kam, yog tsim rau cov dej txias, thiab nws cov txheej txheem rov ua dua tau zoo- tsim; PP, nrog rau nws qhov siab - qhov kub thiab txias tsis kam, tus nqi qis, thiab lub teeb yuag, ua rau cov dej kub, tab sis nws cov khoom siv rov ua dua tsis txaus. Hais txog cov nqi tsim khoom, tus nqi ib khob ntawv khob ntawm PP tsuas yog 55% ntawm PET, ua kom pom qhov zoo ntawm cov khoom siv raw thiab kev siv zog. Hauv kev lag luam kev lag luam, ob qho tib si muaj kev faib tawm ntawm kev ua haujlwm ntawm cov dej kub thiab dej txias, thiab ib puag ncig zoo sib xws yog tsav kev sib tw ntawm cov khoom siv rov ua dua tshiab thiab biodegradable.
Cov lus pom zoo ntawm txoj cai: Cov tuam txhab haus dej haus yuav tsum xaiv cov khoom siv raws li cov khoom lag luam: PET rau cov dej haus txias thiab PP rau cov dej kub; Cov tuam txhab sib txawv tuaj yeem siv ua ke. Cov tub ua lag luam yuav tsum tau them nyiaj rau PET kev lag luam rov ua dua tshiab thiab lub teeb pom kev zoo ntawm PP, thiab nqis peev hauv bio-cov khoom siv thev naus laus zis. Cov neeg tsim cai lij choj yuav tsum txhim kho PET cov txheej txheem rov ua dua tshiab, txhawb nqa PP rov ua dua tshiab thev naus laus zis tshawb fawb thiab txhim kho, thiab txhawb kev sib txawv ntawm ib puag ncig cov cai. Nyob rau hauv lub neej yav tom ntej, PET yuav tsum tau nce tus nqi ntxiv ntawm cov khoom siv rov ua dua tshiab, thiab PP yuav tsum tau tsim kom muaj kev rov ua dua tshiab. Ob leeg yuav tsum tau hloov mus rau ib puag ncig cov cai los ntawm kev siv thev naus laus zis kom ua tiav txoj kev loj hlob ruaj khov.
