Silicone Coffee Machine Keypad
Backlight/laser etching Keypad
1). General purpose silicone in transparent or translucent or milky for molding the blank.
2). Spray painting by the machine in multi-color layers.
Basic colors: White and Black.
White is for the graphics backlight.
Black is for the keypad light leak proof.
3). Laser etching for all graphics on the keytop for a backlight effect.
4). Light box inspection in a dark room for the graphics backlight and the keypad light leak proof.
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 175 grams load guaranteed!
c). Plus Uv-Proof material on the above a) or b) to stop the white graphics becoming yellowish for the outdoor application(Marine, GPS, Military…).
HIGHTLIGHTS:
The following silicones are not suitable for a backlight keypad
a). Fluorosilicone(FSR).
Due to some of the physical colors are light yellow or white, but some FSR rubbers are translucent for backlight.
b). Flame retardant silicone(UL-94V0 grade)
Due to the material color is off-white, not clear.
To improve the key cycle life, no broken for the web, a high tear silicone can be added into the molding recipe.
LED with Bi-Color(Multi-Color) used for the same graphic with different backlighting color.
Application:
For the coffee machine.