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High Density Polyethylene (HDPE) vs Polycarbonate (PC) for Thermoformed Sanitary Ware and Acrylic Trays: Which Sheet Wins in home appliance?

2026-10-02 Plastic News 0 views

High Density Polyethylene (HDPE) and Polycarbonate (PC) are the two most quoted sheet materials for thermoformed sanitary ware and acrylic trays in home appliance projects. Both run well on standard thermoforming equipment, but they differ in clarity, toughness and sealing.

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 thermoformed sanitary ware and acrylic 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 custom shapes and drain positions; bathtub and shower tray sizes; reinforced with fibreglass backing. Materials most often specified are Polycarbonate, Polymethyl Methacrylate, High Density Polyethylene, Acrylonitrile Butadiene Styrene, and the choice between them changes stiffness, temperature resistance, chemical behaviour and price.

In the home appliance sector the decision is usually driven by deep draw capability and chemical resistance to insulation foam, with surface quality as a secondary requirement. Typical end uses include refrigerator liners, control panel surrounds, freezer interiors.

Key Material Properties

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

MaterialDensityTensile strengthService temperature
High Density Polyethylene0.94-0.97 g/cm³20-32 MPa-50°C to 80°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

High Density Polyethylene is frequently the default selection here: HDPE combines toughness with chemical inertness, which is why it dominates pipe and tank markets.

High Density Polyethylene Compared With Polycarbonate

High Density Polyethylene grades offer high impact strength even at low temperature, while Polycarbonate brings outstanding impact strength (250x glass). For home appliance service the difference shows up in UV stability and in the long term behaviour under load.

  • High Density Polyethylene: HDPE combines toughness with chemical inertness, which is why it dominates pipe and tank markets.
  • Polycarbonate: PC replaces glass where impact safety matters, but it needs a hard coat for abrasion resistance.

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

Common Grades and Variants

  • Polycarbonate based: outstanding impact strength (250x glass)
  • High Density Polyethylene based: high impact strength even at low temperature
  • Polymethyl Methacrylate based: up to 92% light transmission
  • Acrylonitrile Butadiene Styrene based: high impact toughness

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.

  • Thick gauge forming
  • Cnc trimming
  • Vacuum forming
  • Polishing

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 Thermoformed sanitary ware and acrylic trays Correctly

These are the criteria that actually predict whether the part will perform in service.

  1. confirm the Standard for baths or shower trays in your market
  2. validate the drain area with a load test
  3. confirm the reinforcement method and thickness
  4. check crazing resistance with a stress test
  5. specify surface protection film

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 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 thermoformed sanitary ware and acrylic trays in High Density Polyethylene?

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.

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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