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Moulding Services

Silicone Rubber Keypads

Rubbertech have been manufacturing silicone rubber keypads for over 25 years. Our keypads can be found in test instruments, chip and pin devices, hospital call alarms, fire alarm panels and many more electronic control systems.

Rubber keypads

Rubber keypads are produced in silicone rubber by means of compression moulding, this process allows us to mould the angled web areas that control the tactile feel of the buttons and also incorporate conductive carbon contacts into the finished moulding. Moulding the keypads in silicone means we can cater easily for specific material characteristics that are required, such as:

  • Conductive silicone keypads
  • High Temperature Keypads
  • Multi coloured keypads (colour matched to pantone references)
  • UL Flame Retardant Keypads
  • FDA approved silicone keypads
  • Medical Grade silicone keypads
  • Anti-bacterial silicone keypads
  • Luminescent
  • Translucent(Used for backlit keypads)

The most important feature of any keypad is how it operates and feels. There are several methods available:

  • Carbon Pills – Keypads can be designed to have specific operating force and button travel. Often keypad force is between 100 and 300g with the travel between 0.8 mm and 2.0 mm. These keypads would then have carbon pills to create the switch between the keypad and the PCB.
  • Metal Domes Layer – Keypads can be designed and supplied with a tactile metal dome layer assembled. This generally means a short operating travel but a strong positive “click” feel and sound as the keypad actuates the metal dome switch. As the keypad has minimal button movement the number of operations the keypad will achieve would be very high. The dome layers come assembled to the keypad with a peel off adhesive layer for easy customer assembly.
  • Polydome Layer - Keypads can be designed and supplied with a tactile polydome layer assembled. This generally means a short operating travel but a good “click” feel as the keypad actuates the polydome switch. As the keypad has minimal button movement the number of operations the keypad will achieve would be very high. The dome layers come assembled to the keypad with a peel off adhesive layer for easy customer assembly.
    • We can also supply keypads assembled to a flexible printed circuit board with connector tail ready for customer to assemble. These assemblies can be supplied with leds for backlighting and with adhesive peel off layers for easy customer assembly.

Keypad printing and finishing options

After moulding the silicone rubber keypads can be finished in several different ways to add further value to the product.

It is extremely important to get the final finish quality of the keypad correct. Rubbertech have been printing keypads for over 25 years and can help advise on the best method to achieve the finish required. There are many options available, such as:

  • Multi colour printing (all print colours can be pantone matched)
  • Spray colour finish
  • Metallic spray finish
  • Negative printing. Often used on translucent keypads to offer backlit effects
  • Laser Etching. Used to create backlit legends

After printing it is important to add a protective finish to ensure any print or coloured spray does not wear after use.

  • Clear matt silicone protective spray coating
  • Clear silicone protective spray coating with anti-bacterial additive
  • Clear matt PU based protective spray coating
  • Epoxy Resin
  • Plastic Caps

We accept 2D and 3D CAD data and only ask that you supply us with the basic model showing overall dimensions and quantities required, we can supply a quotation from this information. Once accepted we will help to refine the design to ensure the keypad offers the correct operating force and travel that our customers require.

Please contact us to discuss your design or requirement further or send us a drawing for quotation.

Silicone Keypads
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