1. Taw qhia
Polyethylene terephthalate (PET) yog ib qho ntawm lub ntiaj teb no ntau yam thiab dav siv thermoplastics. Raws li cov khoom siv tseem ceeb rau lub raj mis dej haus, ntim khoom noj, thiab cov khoom siv hluavtaws, PET muab cov khoom zoo ntawm lub cev nrog rau kev rov ua dua tshiab. Kab lus no tshuaj xyuas PET cov yam ntxwv tseem ceeb, cov txheej txheem ua, thiab cov ntawv thov sib txawv hauv kev lag luam.
2. Cov khoom siv
Physical & Mechanical Properties
- High Strength-rau-Weight Ratio: Tensile zog ntawm 55-75 MPa
- Clarity:> 90% lub teeb kis tau tus mob (qib crystalline)
- Barrier Properties: Zoo CO₂ / O₂ tsis kam (txhim kho nrog txheej)
- Thermal Resistance: Serviceable mus txog 70 ° C (150 ° F) tas mus li
- Qhov ceev: 1.38-1.40 g / cm³ (amorphous), 1.43 g / cm³ (crystalline)
Tshuaj tiv thaiv
- Zoo heev tiv taus dej, cawv, roj
- Nruab nrab tsis kam mus rau qaug zog acids / bases
- Tsis zoo tiv thaiv kom muaj zog alkalis, qee cov kuab tshuaj
Environmental Profile
- Recycling Code: #1
- Hydrolysis Risk: Degrades ntawm qhov kub thiab txias / pH
- Recyclability: tuaj yeem rov ua dua 7-10 zaug yam tsis muaj khoom loj
3. Cov txheej txheem ua haujlwm
| Txoj kev | Tej kev siv | Cov ntsiab lus tseem ceeb |
|---|---|---|
| Txhaj Stretch Tshuab Moulding | Lub raj mis haus | Biaxial orientation txhim kho lub zog |
| Extrusion | Zaj duab xis, nplooj ntawv | Yuav tsum tau ua kom txias ceev kom pom tseeb |
| Fiber spinning | Textiles (polyester) | High-speed spinning ntawm 280-300 ° C |
| Thermoforming | Cov tais zaub mov | Qhov tseem ceeb ua ntej ziab (≤50 ppm ya raws) |
4. Cov ntawv thov loj
Ntim (73% ntawm lub ntiaj teb xav tau)
- Lub raj mis haus: 500 billion units ib xyoos twg
- Cov thawv ntim khoom noj: Microwavable tais, zaub xam lav clamshells
- Pharmaceutical: Cov hnab ntim quav, lub raj mis tshuaj
Textiles (22% xav tau)
- Polyester Fiber: Khaub ncaws, upholstery
- Technical Textiles: Seatbelts, conveyor siv
- Nonwovens: Geotextiles, filtration media
Kev Siv Tawm Tshiab (5% tab sis loj hlob)
- 3D Printing: Siab zog filaments
- Electronics: Insulating films, capacitor Cheebtsam
- Renewable Energy: Hnub ci vaj huam sib luag backsheets
5. Sustainability Advancements
Recycling Technologies
- Mechanical Recycling (90% ntawm Recycled PET)
- Ntxuav-flake-melt txheej txheem
- Khoom noj khoom haus qib yuav tsum tau ntxuav super
- Tshuaj Recycling
- Glycolysis/depolymerization rau monomers
- Cov txheej txheem enzymatic tshwm sim
Bio-based PET
- 30% cog-derived MEG Cheebtsam
- Coca-Cola's PlantBottle™ technology
- Tus nqi them tam sim no: 20-25%
6. Kev sib piv nrog lwm cov yas
| Khoom | PET | HDPE | PP | PLA |
|---|---|---|---|---|
| Qhov tseeb | Zoo heev | Opaque | Translucent | Zoo |
| Max siv Temp | 70 ° C | 80 ° C | 100 ° C | 55 ° C |
| Oxygen Barrier | Zoo | pluag | Nruab nrab | pluag |
| Recycling Rate | 57% | 30% | 15% | <5% |
7. Yav tom ntej Outlook
PET txuas ntxiv ua tus thawj coj ntim khoom siv ib zaug thaum nthuav dav rau hauv daim ntawv thov ruaj khov los ntawm:
- Txhim kho cov txheej txheem thaiv txheej txheem (SiO₂ txheej, ntau txheej)
- Advanced recycling infrastructure (chemically recycled PET)
- Kev hloov kho kev ua haujlwm (nano-composites, cuam tshuam kev hloov pauv)
Nrog nws qhov tshwj xeeb sib npaug ntawm kev ua tau zoo, kev ua tau zoo thiab rov ua dua tshiab, PET tseem tseem ceeb hauv kev lag luam plastics thoob ntiaj teb thaum hloov mus rau cov qauv tsim khoom.
Post lub sij hawm: Lub Xya hli ntuj-21-2025