Silicone keypads and keypad buttons
Keypads made of silicone are mainly used in access control systems, security and fire alarm systems, telecommunications equipment, household devices, and various control systems.
Some typical button construction for silicone keypads
- Keypads with different hardness of keypad and buttons
- Keypads assembled by using special holes with low force
- Keypad with LED (square button with a window for LED, LED on a PCB, etc.)
- Keypad with limited key stroke
- Keypads with resistance to low temperatures (operating range is -60 … + 250 ° С)
- Keypads and panels with backlit
- Epoxy-coated keypads
- Flat keypads
- Metallic coated keypads
- Laser engraved keypads
- Keypads with multiple base colors
- Keypads with metal membranes
- Keypad buttons
Mechanical and electrical characteristics of silicone rubber for keypads
| Temperature for use, ° С (Please note that the indicated temperature ranges are the maximum, and please specify the range you require in request) | from -60 to +250 |
| Specific gravity | 1,16 |
| Tensile strength, kg / cm sq | 90 |
| Tear strength, kgf / cm | 13 |
| Compression set,% | 10 |
| Elongation at break,% | 350 |
| Volume resistivity, Ohm / cm | 8-1014 |
| Contact resistance for rubber contacts | no more than 100 Ohm |
| Contact resistance for applied coating (printing) | not more than 500 Ohm |
| Maximum permissible power of making or breaking contacts (direct current) | 1W |
| Contact bounce | less than 15ms |
| Insulation breakdown, kV / mm | 20 |
| Colour | all possible |
| Dielectric constant | 4.2 (50 Hz) |
| Dielectric tangent, % | 13 (50 Hz) |