Polyethylene Terephthalate (PET) is the most widely recycled plastic in the world. PET features excellent mechanical, optical, and electrical properties.
PET has high dimensional stability, low shrinkage on heating, good chemical resistance, and very good electrical insulation. PET is a transparent and strong, tough, and stiff polymer with both excellent gas and moisture barrier properties.
However, PET does need to be dried before processing in order to minimize hydrolysis, or the degradation due to the presence of moisture. This material can be utilized in several different manufacturing processes including, injection molding, blow molding, injection blow molding, and injection stretch blow molding. This give PET the versatility to be used in a wide variety of applications.
The two main uses for PET resin in fiber-type applications, and pop-bottle applications.