When transporting, storing PET bottles in hot weather, Spectra Packaging recommends delivering direct without unnecessary delays, using ventilated trailers, not leaving pallets in direct sunlight, storing pallets away from heat sources, windows, skylights

Sample article from our Packaging Industry

July 8, 2022 (press release) –

As we hopefully enjoy a hot summer, it's worth considering the impact a rise in temperatures can have on your Polyethylene terephthalate (PET) bottles.

You can do several things to avoid potential distortion and shrinkage when transporting and storing PET bottles in hot weather or warm environments. 

For example, temperatures of over 30°C can start to affect the walls of the container, causing stress, which can cause distortion and shrinkage, even when the bottle is packed in a box.

PET behaves differently in certain conditions to other polymers such as High-density polyethylene (HDPE). Although the material boasts some fantastic benefits, such as excellent clarity, barrier characteristics and recyclability, it needs to be handled with care during rises in ambient temperature.

Indeed, there have been occurrences where PET bottles have been boxed and stored under metal roofs with minimal airspace, causing significant shrinkage in a matter of hours.

Transporting PET in raised temperatures has its hazards too. However, you can take simple actions to help eliminate potential problems, such as delivering direct without too many unnecessary delays and using adequately ventilated trailers.

Once you’ve transported your PET, it’s essential to store your bottles carefully to minimise further risks. We would always recommend that pallets not be left in direct sunlight when loaded or unloaded and would advise that pallets be stored away from any heat sources, windows, or skylights.

If customers are concerned about how to store their packaging or need further advice, our expert team are on hand to offer the best advice if required on 01986 834190.

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Chelsey Quick
Chelsey Quick
- VP Client Success -

We offer built-to-order packaging industry coverage for our clients. Contact us for a free consultation.

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