How to Store and Transport PET Packaging Safely

Protect Your PET Bottles and Containers from Heat Damage

Polyethylene Terephthalate (PET) is widely used across personal care, home care, and food and beverage sectors thanks to its durability, lightweight nature, and excellent resistance to moisture and organic materials. It’s also virtually shatterproof and 100% recyclable, making it a favourite for brands prioritising sustainability and safety.

But like all plastics, PET has its limits – and heat sensitivity is one of them. Improper storage or exposure to high temperatures can lead to shrinkage, distortion, and compromised product integrity.

Understanding PET’s Thermal Sensitivity

PET begins to lose its shape and performance when exposed to elevated temperatures for extended periods. The speed and extent of shrinkage depends on factors such as ambient heat, exposure time, and the specific properties of the PET container.

Here’s a breakdown of how PET reacts to different temperature ranges:

• Above 50°C – Visible shrinkage in less than 1 hour

• 42°C to 50°C – Shrinkage may occur within 12 hours

• 35°C to 42°C – Deformation possible in up to 5 days

• 30°C to 35°C – Effects can appear after about 20 days

Best Practices for Shipping & Storing PET Packaging

Whether you’re storing PET packaging in your warehouse or transporting it across the country, these guidelines will help maintain its quality and avoid heat-related damage:

During Transportation

• Plan with Your Logistics Partner
  Always consult with your shipping provider—especially when transporting via container or trailer – to ensure optimal transit conditions.

• Request Direct Delivery
  Where possible, arrange for direct delivery to avoid layovers or delays that can increase exposure to high heat.

• Use Light-Coloured or Ventilated Trailers
  Dark surfaces absorb more heat. Opt for light-coloured trailers or those with ventilation to reduce temperature build-up.

• Unload Immediately on Arrival
  PET products should be offloaded quickly to prevent them sitting in a hot trailer or under direct sunlight.

In Storage

• Avoid Sunlight & Skylights
  Never store PET pallets in direct sunlight. Even filtered light through a skylight can raise temperatures to damaging levels.

• Keep Away from Heat Sources
  Store PET well away from warehouse heaters, boilers, or exhaust vents. Maintain good airflow throughout the space.

• Maintain a Stable Environment
  Keep ambient temperatures below 35°C, especially during warmer months. If necessary, consider climate-controlled storage.

• Avoid Metal Roofing Without Ventilation
  Warehouses with low metal ceilings can trap heat. Ensure adequate insulation or ventilation is in place.

• Follow Stock Rotation Principles
  Use FIFO (First In, First Out) practices and monitor shelf life to ensure product quality throughout its lifespan.

Why It Matters

Following these simple precautions helps:

• 🛡 Maintain packaging integrity and avoid costly rework

• 🌿 Preserve the sustainability profile of recyclable PET

• 📦 Ensure packaging remains fit-for-purpose in every application

• 🧴 Protect product quality – from filling line to end user

By taking care with how PET is handled in your supply chain, you reinforce your brand’s commitment to quality, safety, and compliance – values that consumers notice and trust.