Thermoforming is one of the most widely used processing methods for plastic sheet materials, especially in packaging and consumer product manufacturing. Polyethylene terephthalate materials are well suited for this process due to their controlled softening behavior and stability after forming.
During thermoforming, a PET Sheet is heated to a forming temperature typically between 110°C and 160°C. At this range, the material becomes flexible without losing structural integrity. It can then be shaped using vacuum or pressure forming techniques.
One of the key advantages is consistent wall thickness distribution. Properly controlled forming ensures uniform stretching, reducing weak points in final products. This is especially important for blister packaging and protective trays.
Cooling rate is also critical. PET materials cool relatively quickly, allowing high production speeds in automated forming lines. Once cooled, the material regains rigidity and maintains shape stability.
Shrinkage control is another important parameter. PET typically exhibits low shrinkage rates, often below 0.5–1%, which improves dimensional accuracy in molded parts.
Forming pressure varies depending on application, but vacuum forming systems commonly operate between -0.6 to -0.9 bar. This allows precise shaping of detailed molds.
A PET Sheet also supports post-processing operations such as trimming, drilling, and sealing, making it suitable for multi-step production workflows.
Industries that benefit from thermoformed PET include food packaging, electronics inserts, and protective covers. Its balance of clarity, rigidity, and formability makes it a preferred material for high-volume production.