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Common Defects in PVC Face Seal Blister Packaging for toys and games and How to Prevent Them

2026-10-02 Plastic News 0 views

Most quality claims on thermoformed parts trace back to a handful of root causes. Learn to recognise them on the drawing, in the tool and on the finished part.

Use it as a working checklist when you write your next enquiry.

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 transparent, frosted and coloured; flange width 6 to 12 mm; single and multi cavity layouts. Materials most often specified are Polystyrene, Polyvinyl Chloride, Recycled PET, Polyethylene Terephthalate, 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, collector windows, 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
Recycled PET1.35-1.40 g/cm³45-65 MPa-40°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.

Failure Modes and Prevention

Each defect below has a root cause that can be removed at the design or tooling stage.

  • corner thinning – usually caused by packing pressure; prevent it by controlling cycle parameters.
  • poor seal to the card – usually caused by tool wear; prevent it by controlling incoming inspection.
  • webbing between cavities – usually caused by melt temperature; prevent it by controlling handling and storage.
  • static dust pickup – usually caused by cooling rate; prevent it by controlling handling and storage.
  • curling after sealing – usually caused by packing pressure; prevent it by controlling incoming inspection.

Common Grades and Variants

  • Polyvinyl Chloride based: inherently flame retardant
  • Polyethylene Terephthalate based: excellent barrier to CO2 and moisture
  • Polypropylene based: lowest density among commodity plastics
  • Polystyrene based: rigid and glossy

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.

  • Vacuum forming
  • Pressure forming
  • Die cutting
  • Heat sealing

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

Work through these points in order and most specification mistakes disappear.

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

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.

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.

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.

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

If you are planning a new toys and games 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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