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Design Guide for PVC Thermoformed Point of Sale Display Trays in retail and merchandising: Draft, Radii and Draw Ratio

2026-10-02 Plastic News 0 views

Thermoforming rewards designs that respect how a heated sheet stretches. These rules prevent most tooling rework and most thickness complaints.

The notes below come from day to day production and export work with overseas buyers.

Product Overview

This category covers a family of products rather than a single item. In practice a buyer defines thermoformed point of sale display 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 printed graphics and logo embossing; gauge 0.50 to 2.00 mm; stackable for transport. Materials most often specified are Polystyrene, Recycled PET, Polyethylene Terephthalate, Polypropylene, and the choice between them changes stiffness, temperature resistance, chemical behaviour and price.

In the retail and merchandising sector the decision is usually driven by shelf presentation and print quality, with stack strength as a secondary requirement. Typical end uses include shelf trays, counter displays, promotional packs.

Key Material Properties

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

MaterialDensityTensile strengthService temperature
Polyvinyl Chloride1.38-1.45 g/cm³40-55 MPa-10°C to 60°C
Recycled PET1.35-1.40 g/cm³45-65 MPa-40°C to 70°C
Polystyrene1.04-1.06 g/cm³30-50 MPa-20°C to 70°C

Polyvinyl Chloride is frequently the default selection here: PVC can be formulated from rigid pipe compound to soft medical grade by changing plasticiser content.

Design Rules for Thermoformed Parts

Thermoforming rewards designs that respect how the sheet stretches. These rules prevent most tooling rework.

  • Make corner radii at least equal to the sheet thickness; sharp corners are where holes start.
  • Use a draft angle of at least 3 degrees per side so the part releases without vacuum locks.
  • Confirm the trim method early: steel rule die, CNC router or press tool each have different tolerances.
  • Keep the draw ratio moderate: deep cavities thin the sheet and force you to start with a thicker gauge.
  • Leave a flat sealing flange of at least 6 mm when the pack has to be heat sealed or lidded.
  • Avoid undercuts unless the tool has moving sections, which adds cost to every cycle.

Send these rules to your designer together with the sheet gauge and the target cycle time; most tooling modifications come from ignoring draft and corner radii.

Common Grades and Variants

  • Polypropylene based: lowest density among commodity plastics
  • Polystyrene based: rigid and glossy
  • Recycled PET based: lower carbon footprint than virgin resin
  • Polyethylene Terephthalate based: excellent barrier to CO2 and moisture

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

The route below is the one most factories use for this type of part.

  • Printing
  • Assembly
  • Pressure forming
  • Die cutting

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 point of sale display trays Correctly

Use this checklist when comparing two or three supplier quotations.

  1. confirm the display location and lighting conditions
  2. validate print adhesion and abrasion
  3. design for flat packing to cut freight
  4. check stack strength for the loaded display
  5. use one colour reference for the whole campaign

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

Frequently Asked Questions

What is the minimum order quantity for thermoformed point of sale display 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.

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.

How do you control colour consistency?

Colour is controlled with a masterbatch reference approved by the customer, and every production lot is checked against the approved sample under standard lighting before shipment.

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.

Can you produce thermoformed point of sale display trays in Polyvinyl Chloride?

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.

Conclusion

If you are planning a new retail and merchandising project, send us your drawing, annual volume and target properties, and we will come back with a material proposal, a tooling plan and a budget quotation.

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