PBAT (Polybutyleneadipate-co-terephthalate)
PBAT is a terpolymer of 1,4-butanediol, adipic acid and terephthalic acid. Thanks to the benzene ring structure, the tear strength of PBAT is 120% of that of polyethylene, and the impact strength is 130% of that of polyethylene. The above properties are necessary for the production of high-performance membranes. PBAT is currently the main raw material for biodegradable plastic membranes. It is predicted that by 2024, the production capacity of biodegradable plastics will grow to 1.33 million tons, an increase of approximately 13.6%
■ Properties:
★PBAT, is a aliphatic-aromatic copolyester based on the monomers 1,4-butanediol, adipic acid and terephthalic acid.
★Be easily molded and thermoformed.
★One of the few compostable polymers.
★Blended with PLA as bags has similar strength, stiffness, printability, processability on blown film compared with conventional plastic bag(i.e. PP/PE).
■ Applications:
• PBAT decomposable plastic is mainly used in plastic bags/packaging materials/mulch.
• Commodity container
• Food packaging
• Translucent food container
• Zipper bag
• Cold drink cup
• Agricultural mulch
■ Comparison of properties for PLA, PBAT and PBS
◆ Biodegradability: PBSA>PBS>PBAT>PLA
◆ Heat Resistance: PBS>PBSA>PLA>PBAT
◆ Tear Strength: PBAT>PBSA>PBS>PLA
◆ Flexibility: PBAT>PBSA>PBS>PLA