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Design Guide for PVC Slide Blister and Sleeve Packaging in electronics and electrical: 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.

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 slide blister and sleeve 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 hanging hole options; printed card sleeves; sleeve and tray combinations. Materials most often specified are Polystyrene, Recycled PET, Polyvinyl Chloride, Polyethylene Terephthalate, 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 connector carriers, accessory blisters, battery packs.

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
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

Apply these points before the tool is cut; after that every change costs tooling and time.

  • Use a draft angle of at least 3 degrees per side so the part releases without vacuum locks.
  • Keep the draw ratio moderate: deep cavities thin the sheet and force you to start with a thicker gauge.
  • Confirm the trim method early: steel rule die, CNC router or press tool each have different tolerances.
  • 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.
  • 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

  • Polyethylene Terephthalate based: excellent barrier to CO2 and moisture
  • Polystyrene based: rigid and glossy
  • Polyvinyl Chloride based: inherently flame retardant
  • 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

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

  • Assembly
  • Sleeve forming
  • Vacuum forming
  • Printing

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 Slide blister and sleeve packaging Correctly

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

  1. check the fit tolerance between sleeve and blister
  2. avoid over-tight fits that split the sleeve
  3. confirm the sleeve board grade and coating
  4. validate hanging strength for retail
  5. test the pack after vibration and drop

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.

Can you produce slide blister and sleeve 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.

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.

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.

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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