Silicone Keypad for Truck Audio

Silicone Keypad for Truck Audio

Backlight (laser etching) Keypad.

1). General purpose silicone in translucent, milky for molding the rubber blank.

2). Spray painting in multi-color layers(basic, white/black).

3). Laser etching for all graphics for a blacklight effect.

4). Light box inspection in a drak room for the graphics backlight and the keypad light leak.

5). Surface coating for protection.

a). Silicone matte (SM) coating for a comfortable touch feeling.

b). PU matte coating for a good worn/abrasion proof(RCA Tester).

Above 400 continual cycles with 175grams load guaranteed by RCA tester.

c). Adds UV-proof material on the above a) and b) to stop the white graphic becoming yellowish for the outdoor environment(Marine,outdoor, military...).


The following silicones are not suitable for a backlight keypad.

a). Fluorosilicone(FSR), due to the standard FSR color is light yellow or white( There is a transparent FSR on market, but the price is sky).

b). Flame retardant silicone, especially for UL94-V0 grade silicone, due to the color is off-white.

To improve the key cycle life, a high tear silicone can be added into the molding.


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