U.S. P&G Corporation began PHA research and development as early as 1980. In recent years, PHA has been successfully developed as a new type of biodegradable plastic. It is composed of two different comonomer: 3-hydroxybutyrate and The long-chain branched (3- 20 C) 3-hydroxy fatty acid esters, trade name "Nodax", have good biodegradability and anaerobic biodegradability compared with other biodegradable plastics. Hot alkali liquor digestibility, room temperature hydrolysis stability, good oxygen and taste barrier properties and extensive compatibility with other materials. Nodax can be processed into films, fibers, nonwovens and foams. The main obstacle to widespread market access today is the high cost.

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