The molecular structure of PET plastic is highly symmetrical and has a certain crystal orientation ability, so it has high film-forming properties. PET has good optical properties and weather resistance, and amorphous PET has good optical transparency. In addition, PET has excellent wear resistance, friction, dimensional stability and electrical insulation. Bottles made of PET have high strength, good transparency, non-toxic, anti-permeability, light weight, high production efficiency, etc., so they have been widely used.
In the plastic classification, the code name of PET is No. 1, which has a wide range of functions: it can be spun into polyester fiber, that is, polyester. The secondary recycling of PET bottles for general food packaging can be used for this purpose, so PET plastic bottles have good environmental protection. It can be made into film for the substrate, insulating film, product packaging, etc. of audio, video, movie film, etc.; as a plastic, it can be blown into various bottles, such as cola bottles, mineral water bottles, etc.
The molecular chain structure of PBT and PET is similar, and most of the properties are the same. PBT has lower check here strength and stiffness, but has better resistance to impact, and its glass transition temperature is also lower. Both PET and PBT are sensitive to hot water over 60 °C. It is suitable for use as food processing blades, vacuum cleaner components, electric fans, hair dryer shells, coffee utensils, electrical component switches, motor shells, fuse boxes, computer keyboard keys, etc., industrial radiator grilles, body panels , Wheel covers, door and window parts, etc.