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Polyvinyl Chloride (PVC) vs Polyethylene Terephthalate (PET) for Face Seal Blister Packaging: Which Sheet Wins in hardware and tools?

2026-10-02 Plastic News 0 views

Polyvinyl Chloride (PVC) and Polyethylene Terephthalate (PET) are the two most quoted sheet materials for face seal blister packaging in hardware and tools projects. Both run well on standard thermoforming equipment, but they differ in clarity, toughness and sealing.

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 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; flange width 6 to 12 mm; transparent, frosted and coloured. Materials most often specified are Polyvinyl Chloride, Recycled PET, Polystyrene, Polyethylene Terephthalate, and the choice between them changes stiffness, temperature resistance, chemical behaviour and price.

In the hardware and tools sector the decision is usually driven by puncture resistance and hanging strength, with visibility as a secondary requirement. Typical end uses include fixing packs, hand tool clamshells, garden tool 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
Polyethylene Terephthalate1.35-1.40 g/cm³50-70 MPa-40°C to 70°C
Recycled PET1.35-1.40 g/cm³45-65 MPa-40°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.

Polyvinyl Chloride Compared With Polyethylene Terephthalate

Polyvinyl Chloride grades offer inherently flame retardant, while Polyethylene Terephthalate brings excellent barrier to CO2 and moisture. For hardware and tools service the difference shows up in creep and in the long term behaviour under load.

  • Polyvinyl Chloride: PVC can be formulated from rigid pipe compound to soft medical grade by changing plasticiser content.
  • Polyethylene Terephthalate: High IV PET resin is the reason a 1.5 L bottle can be light yet hold carbonation pressure.

The practical decision usually comes down to the service environment: temperature, chemical exposure and expected lifetime.

Common Grades and Variants

  • Recycled PET based: lower carbon footprint than virgin resin
  • Polystyrene based: rigid and glossy
  • 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

Processing method drives both cost and performance, so it should be fixed early in the design.

  • Die cutting
  • Heat sealing
  • Sheet extrusion
  • Vacuum 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

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

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

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 tolerance can be achieved?

Standard production tolerance follows the relevant ISO or DIN tolerance class for the process; tighter tolerances are possible after machining or grinding, but they add cost. Define the tolerance only on the functional dimensions.

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.

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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