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The PET plastic molecular structure is highly symmetrical and has a certain crystal orientation ability, so it has high film formation and formation. PET plastics have good optical properties and weather resistance, and amorphous PET plastics have good optical transparency. In addition, PET plastics have excellent wear resistance, dimensional stability, and electrical insulation.
PBT and PET molecular chain structure are similar, most of the properties are the same, but the molecular backbone is changed from two methylene groups to four, so the molecules are more supple and the processing performance is better.