Silicone Conductive Keypad is also called Electrically Conductive Printing Silicone Rubber keypad and Transfer Printing Electric Conduction Keypad, which choose conductivity ink instead of black carbon pills as silicone rubber keypad’s electroconductive point.
Why choose electrically conductive ink printing as the keypad contact dome?
Keypad electrically conductive zone is irregular, or O-ring /Rectangular Shaped for backlight.
Mostly silicone keypad choose black carbon pills to electric conduction.
However, some keypad conductive zones is irregular, specially about laser etched keypad and silkscreen silicone rubber keypad for Led backlight / backlit switch effects.
Product Specifications
| Hardness | 30-80 Shore A |
| Logo | Printed/debossed/embossed |
| Special | UV/chemical resistance,waterproof |
Product Pictures
Save production cost
Placed many quantity or many types of black carbon pills to produce elastomeric keypad which will affect the production efficiency.
If choose transfer conductive printing, workers just place elastomeric silicone rubber materials to produce keyboard that will save production time. Electrically Conductive Ink Printing can coat many types keypad contact zones at a time, and also that is auto-complete printing.
Disadvantages
Electrically conductive printing ink Keypad, which contact resistance is mostly higher than black carbon pill.
Black Carbon Pill Keypad contact resistance which is easy to control below 100 OHMS, some can up to 0-50 OHMS.
Electric conductive printing Keypad contact resistance, mostly is about 150 OHMS, and possibly up to 200 OHMS.
If need electric conductive printing ink keypad’s control contact resistance, not only need use more conductive materials as printing ink, but also need make precision assistant tooling and also improve the printing in electric conductive coated layer
Black Carbon Pill keypad is more strong and durable.
After a long time use, elastomeric keypad’s electrically conductive ink will removing, and also keypad contact resistance will getting higher.
If need improving the lifespan of transfer conductive printing keypad, one is use qualified electric conductive ink, and make sure conductive coating ink is dry enough after drying.
