Polyethylene terephthalate 1,4-cyclohexanedimethanol ester (PCTG) is an amorphous copolymer ester with outstanding thermoforming properties, excellent toughness, strong weather resistance, good chemical resistance, and stress whitening resistance. Its products are highly transparent and have excellent impact resistance, especially suitable for shaping thick walled transparent products. Its processing and forming performance is excellent, and it can be widely used in markets such as sheet metal, high-performance shrink film, bottles, and special-shaped materials.