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Handling, Storage and Service Life of rPET Thermoformed Food Trays in logistics and warehousing

2026-10-02 Plastic News 0 views

Correct handling and storage protect the performance of thermoformed food trays from the factory to the packing line. This guide covers stacking, climate, static and inspection.

Everything here can be checked on a real sample before you commit to a production order.

Product Overview

This category covers a family of products rather than a single item. In practice a buyer defines thermoformed food trays by three things: the base resin, the format or dimension, and the performance or certification level it has to meet. Typical options in this category include MAP and vacuum lidding options; gauge 0.30 to 1.20 mm; 1 to 8 compartment layouts. Materials most often specified are Polyethylene Terephthalate, Polypropylene, Polylactic Acid, Polystyrene, and the choice between them changes stiffness, temperature resistance, chemical behaviour and price.

In the logistics and warehousing sector the decision is usually driven by stackability and returnability, with traceability as a secondary requirement. Typical end uses include dunnage trays, returnable trays, bakey distribution crates.

Key Material Properties

Typical values for a general purpose grade are listed below; filled, stabilised and speciality compounds will differ.

MaterialDensityTensile strengthService temperature
Polypropylene0.90-0.91 g/cm³25-40 MPa-10°C to 100°C
Polylactic Acid1.24 g/cm³50-60 MPaup to 55°C (HDT)
Polyethylene Terephthalate1.35-1.40 g/cm³50-70 MPa-40°C to 70°C

Recycled PET is frequently the default selection here: Food-grade rPET requires a recognised recycling process plus solid-state polycondensation.

Installation and Care

Build these steps into your standard work instruction.

  1. Re-check torque or alignment after the first month of service.
  2. Acclimatise the material at the installation temperature for at least 24 hours.
  3. Use fixings that allow for thermal expansion; do not clamp rigidly.
  4. Clean with mild detergent and a soft cloth; avoid solvents unless the data sheet allows them.
  5. Inspect every part on arrival and record the batch number.

Outdoor service life depends mainly on the UV stabiliser package and the colour.

Common Grades and Variants

  • Polypropylene based: lowest density among commodity plastics
  • Polyethylene Terephthalate based: excellent barrier to CO2 and moisture
  • Polystyrene based: rigid and glossy
  • Polylactic Acid based: bio-based and industrially compostable

Beyond the base resin, most suppliers offer UV stabilised, food contact, flame retardant, anti-static and recycled content versions of the same product. Ask which additive package is included, because it is often the difference between a part that lasts three years and one that lasts ten.

Processing and Finishing Options

Each step below has its own control points, and skipping one of them is where most defects start.

  • Sheet extrusion
  • Die cutting
  • Thermoforming
  • Plug assist forming

Secondary operations such as printing, welding, machining and assembly are often cheaper to do in the same factory, and they reduce the risk of mismatch between components.

How to Specify Thermoformed food trays Correctly

Use this checklist when comparing two or three supplier quotations.

  1. check the seal integrity at the packing line speed
  2. confirm the recycled content is food grade
  3. specify top load for stacked pallets
  4. confirm the migration test for the actual food type
  5. validate freezer performance if the product is frozen

Send this list to your supplier with the drawing and you will receive comparable quotations from every factory you contact.

Frequently Asked Questions

Do you offer samples?

Yes. Standard samples are normally free of charge and shipped within three working days; custom samples are charged at cost and credited against the first production order.

Can you produce thermoformed food trays in Recycled PET?

Yes. {mat1} is one of our regular materials for this item, and we can supply virgin, modified and certified grades with full traceability. Material certificates and test reports are issued per batch.

What is the minimum order quantity for thermoformed food trays?

For standard sizes and colours the minimum is usually one pallet or one production run; for custom tooling the economic minimum depends on the tooling cost amortised over the expected volume. Send us your annual volume and we will calculate the break even point.

What packing and shipping options are available?

Standard packing is export cartons on fumigation-free pallets, with custom labelling, barcode and retail packing available. We also handle consolidated containers and door to door delivery.

How long does tooling and sampling take?

A new tool typically takes 25 to 45 days depending on cavity count and complexity, followed by T1 samples within one week. Existing tools can usually start production within 10 to 15 days of order confirmation.

Conclusion

Share your specification and quantity with us and we will recommend the most cost effective material, tooling route and packing method for your market.

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