Eastman Chemical Co., Ltd. first developed polymer nanomaterials for applications requiring PET resin with high barrier properties. The principle is that clay thin layer gas is difficult to infiltrate, nano materials are used, and there is no need to make larger blower equipment. change.

DuPont has developed two barrier processes that are nearly industrialized. First, the PET modification improves the barrier properties by 2 to 3 times. The second barrier process, known as transparent aluminum, is an exterior coating. The barrier properties are improved 30 to 40 times.