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Design Guide for PVC Face Seal Blister Packaging in toys and games: 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 face seal blister packaging 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 single and multi cavity layouts; sheet gauge 0.20 to 0.60 mm; transparent, frosted and coloured. Materials most often specified are Polyvinyl Chloride, Recycled PET, Polyethylene Terephthalate, Polystyrene, and the choice between them changes stiffness, temperature resistance, chemical behaviour and price.

In the toys and games sector the decision is usually driven by child safety and presentation, with durability as a secondary requirement. Typical end uses include action figure blisters, model kit trays, game inserts.

Key Material Properties

The table below summarises the values that usually decide the material choice.

MaterialDensityTensile strengthService temperature
Polyvinyl Chloride1.38-1.45 g/cm³40-55 MPa-10°C to 60°C
Polystyrene1.04-1.06 g/cm³30-50 MPa-20°C to 70°C
Polypropylene0.90-0.91 g/cm³25-40 MPa-10°C to 100°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.

  • Confirm the trim method early: steel rule die, CNC router or press tool each have different tolerances.
  • Make corner radii at least equal to the sheet thickness; sharp corners are where holes start.
  • Design uniform wall thickness by avoiding abrupt depth changes in the same cavity.
  • Leave a flat sealing flange of at least 6 mm when the pack has to be heat sealed or lidded.
  • Use a draft angle of at least 3 degrees per side so the part releases without vacuum locks.
  • 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

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

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.

  • Die cutting
  • Heat sealing
  • Vacuum forming
  • Sheet extrusion

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 Face seal blister packaging Correctly

These are the criteria that actually predict whether the part will perform in service.

  1. ask for a drop test on the finished pack
  2. verify recycled content documentation if rPET is used
  3. leave a flat flange for heat sealing
  4. confirm the sealing coating matches the card
  5. check the corner radius against the sheet gauge

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

Frequently Asked Questions

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 face seal blister packaging 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.

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.

Which certifications can you provide?

We can provide ISO 9001 quality system documentation, material certificates, RoHS and REACH statements, and where applicable food contact, flame retardancy or drinking water approvals. Tell us your target market and we will match the document set.

What is the minimum order quantity for face seal blister packaging?

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.

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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