What is the difference between PET, APET, PETE and PETG?

However, due to its high glass transition temperature, low crystallization rate, difficult processing and molding, high molding temperature, long production cycle and poor impact resistance. Therefore, it is necessary to improve its processing performance through reinforcement, filling, blending and other methods. The use of PET can be divided into fiber (70% of the consumption of synthetic fiber in the early stage) and non-fiber. The latter includes well-known packaging materials (food and beverage containers, vacuum packaging, etc.), insulating materials, tape base, film and photographic film, etc. The so-called copolymerization modification is to introduce the third or even the fourth component in addition to the two main components of terephthalic acid (PTA) and ethylene glycol (EG) to participate in the copolymerization, in order to make it form an asymmetric molecular structure and form an amorphous PET copolymer. For example, the PET copolymer prepared by copolymerization modification with binary carboxylic acid is called APET. Compared with PET, the low temperature toughness (impact resistance and tear resistance) and heat resistance of APET are improved.