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Design Guide for PS / HIPS Anti-static and Conductive Component Trays 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.

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 anti-static and conductive component trays 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 gauge 0.40 to 1.20 mm; carbon filled black grades; permanent and topical antistat. Materials most often specified are Polystyrene, Acrylonitrile Butadiene Styrene, Polyethylene Terephthalate, Polycarbonate, 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 device inserts, connector carriers, battery packs.

Key Material Properties

Typical values for a general purpose grade are listed below; filled, stabilised and speciality compounds will differ.

MaterialDensityTensile strengthService temperature
Polypropylene0.90-0.91 g/cm³25-40 MPa-10°C to 100°C
Polycarbonate1.20 g/cm³55-70 MPa-40°C to 120°C
Acrylonitrile Butadiene Styrene1.04-1.06 g/cm³30-50 MPa-20°C to 80°C

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

Design Rules for Thermoformed Parts

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

  • Leave a flat sealing flange of at least 6 mm when the pack has to be heat sealed or lidded.
  • Keep the draw ratio moderate: deep cavities thin the sheet and force you to start with a thicker gauge.
  • Design uniform wall thickness by avoiding abrupt depth changes in the same cavity.
  • Make corner radii at least equal to the sheet thickness; sharp corners are where holes start.
  • 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

  • Acrylonitrile Butadiene Styrene based: high impact toughness
  • Polycarbonate based: outstanding impact strength (250x glass)
  • 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.

  • Pressure forming
  • Thermoforming with conductive compound
  • Printing
  • Resistivity testing

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 Anti-static and conductive component trays Correctly

Use this checklist when comparing two or three supplier quotations.

  1. confirm permanent versus topical antistat
  2. confirm cleanliness requirements for cleanroom use
  3. re-test resistivity after cleaning and ageing
  4. check dimensional stability at process temperature
  5. specify surface and volume resistivity separately

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

Frequently Asked Questions

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 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.

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.

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.

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.

Conclusion

Our team supplies anti-static and conductive component trays to electronics and electrical customers worldwide, with samples, material certificates and full inspection reports available before mass production.

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