Not all PET plastics are transparent. Transparent PET is difficult to make. PET is a highly crystalline polymer with a milky white or pre yellow color, and its surface is smooth and shiny. Good creep resistance, fatigue resistance, friction resistance, and dimensional stability, with low wear and high hardness, possessing the maximum toughness among thermoplastic materials; Good electrical insulation performance, less affected by temperature, but poor corona resistance. Non toxic, weather resistant, stable against chemicals, low water absorption, resistant to weak acids and organic solvents, but not resistant to hot water immersion or alkali.

PET resin has a high glass transition temperature, slow crystallization rate, long molding cycle, long molding cycle, high molding shrinkage rate, poor dimensional stability, brittle crystallization molding, and low heat resistance.

In addition to the properties of PBT, there are also the following characteristics:

1. The bending strength is 200MPa, the elastic modulus reaches 4000MPa, and the creep and fatigue resistance are also good. The surface hardness is high, and the mechanical properties are similar to those of thermosetting plastics;

2. Due to the fact that the price of ethylene glycol used in the production of PET is almost half cheaper than that of butanediol used in the production of PBT, PET resin and reinforced PET are the lowest priced engineering plastics with high cost-effectiveness.

3. The thermal deformation temperature and long-term use temperature are the highest among thermoplastic general engineering plastics;

4. PET release film stay immerse in a soldering bath at 250 ℃ for 10 seconds, with almost no deformation or discoloration, making it particularly suitable for preparing electronic and electrical parts for soldering.