PET (Polyethylene Teraftalat)
PET raw material is an ideal material for packaging gas beverage bottles. These bottles are manufactured by injection – stretch – blow molding processes. In addition to this application, this raw material is preferred especially in the production of heat resistant plastic containers. Compared to other plastics, PET has much better gas barrier properties.
PET has the perfect feature, such as being completely amorphous or highly crystalline. If it is rapidly cooled when it is melted, it solidifies in amorphous state. If the cooling is carried out slowly, it will become crystalline. If it is heated to crystallization temperature, it hardens and takes a matte white color. Crystal PET melts at about 255 oC.
Areas Used in Rigid Plastic Packaging
- Soda bottles
- Water bottles
- Carbonated, gas-free beverage bottles
- Alcoholic beverage bottles
- Energy drink bottles
- Jars for products such as peanut butter
- Olive oil, oil bottles
- Shampoo bottles, soap bottles
- Shower gel bottles
- Drug bottles, mouth fluid bottles
- Detergent bottles
- PET plate
Oriented PET injection — stretch (stretching) — amorphous preform in the blowing molding process is stretched to both width and longitudinal. In this case, the “double axis” consists of stretched or orientated PET. Due to this properties of the process, PET’s resistance to carbonated beverages increases.
APET (Amorph PET)
Amorphous PET is a preferred raw material in the production of transparent plastic containers. Since there is no crystallization, the final product is quite clear. It can be processed by thermoform (heat forming) process.
CPET (Crystal PET)
The crystalized PET (CPET) is a plastic that can be used in the production of containers that can enter the traditional kitchen oven. This feature is given to the material during the thermoform process. During the traditional thermoform process, a process called “heat fixing” is applied. The plastic sheet, made of CPET, is quickly cooled to prevent crystallization. The sheet is then reheated and shaped by the known thermoform method. As a result of this process, the product becomes a structure based on white and heat. This new product can withstand temperatures rising to 2200 C.