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PS / HIPS Face Seal Blister Packaging Specifications for electronics and electrical: Gauge and Tolerances

2026-10-02 Plastic News 0 views

Specification sheets for face seal blister packaging are full of abbreviations. This guide translates sheet gauge, cavity layout and trim tolerance into decisions you can make.

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 sheet gauge 0.20 to 0.60 mm; transparent, frosted and coloured; cavity depth up to 60 mm. Materials most often specified are Recycled PET, Polystyrene, Polyethylene Terephthalate, Polyvinyl Chloride, and the choice between them changes stiffness, temperature resistance, chemical behaviour and price.

In the electronics and electrical sector the decision is usually driven by ESD protection and dimensional accuracy, with cleanliness as a secondary requirement. Typical end uses include component trays, battery packs, accessory blisters.

Key Material Properties

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

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

Polystyrene is frequently the default selection here: HIPS is the default thermoforming sheet for food packaging and appliance liners.

Dimensions, Grades and Tolerances

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

  • transparent, frosted and coloured
  • single and multi cavity layouts
  • sheet gauge 0.20 to 0.60 mm
  • flange width 6 to 12 mm
  • cavity depth up to 60 mm

When you read a supplier quotation, check that the dimension, the resin grade, the colour reference and the tolerance class are all stated. A quotation that only gives a price per piece is not comparable between suppliers.

Common Grades and Variants

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

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.

  • Heat sealing
  • Vacuum forming
  • Die cutting
  • Pressure 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 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. check the corner radius against the sheet gauge
  4. leave a flat flange for heat sealing
  5. confirm the sealing coating matches the card

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 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 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.

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 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.

Conclusion

If you are planning a new electronics and electrical 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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