PBAT, the Chinese name is polybutylene terephthalate adipate. According to the source of biodegradable plastics, it can be divided into bio based biodegradable materials and petrochemical based biodegradable materials. PBAT belongs to petrochemical based biodegradable plastics. It is one of the most active biodegradable materials in the research of biodegradable plastics and one of the best biodegradable materials in the market.
PBAT is a kind of polyester. Polyester = diacid + diol. Polyester also includes PBS, PBSA and PBT.
PBAT is prepared by direct esterification or transesterification with 1,4-butanediol (BDO), adipic acid (AA), terephthalic acid (PTA) or ethylene terephthalate (DMT) as raw materials.
* Basic performance
- PBAT is a semi crystalline polymer
-Crystallization temperature：usually around 110 ℃
-Melting point： about 130 ℃
-Density：between 1.18g/ml and 1.3g/ml
-Crystallinity of PBAT: about 30%
-Shore hardness: above 85
** Applications of PBAT
PBAT material can be biodegradable and composted, so the use of PBAT can resist white pollution. The biodegradable garbage bag produced by PBAT is the membrane material used by the biological composting garbage center to recover biological waste, which is mainly used in: fully degradable packaging film; Fully degradable packaging bag, including shopping bag, continuous roll garbage bag, pet feces bag, electronic product packaging bag, food packaging bag, plastic film, etc.
Driven by environmental protection policies, biodegradable plastics such as PLA, PBAT, PHA, PCL and PBS are ushering in new opportunities for market development in the fields of disposable tableware, packaging, agriculture, automobile, medical treatment and textile. There will also be a new round of innovation in the modified materials of biodegradable plastics and related additives, such as link extension, anti hydrolysis agent, toughening agent, nucleating agent and antibacterial agent.
