Silk-printing Dustproof Tactile Dome Switch Poly With 3M9448
A membrane switch consists of various layers laminated together. The layers of a basic membrane switch construction include: a membrane overlay, spacer, printer circuit, rear adhesive, and tail filler. Depending on the environment and requirements of the application into which the membrane switch plugs into, the construction can vary. For example, if shielding is necessary, a two-circuit membrane switch design would be a better construction choice.
Material
1.Polyester: is used for both circuit layers and overlay layers. High temp and corrosion resistant, the flexibility and mechanism are good as well as high reliability. It is mostly suitable used in products where the application environment are atrocious or products are emboss required.
2.Polycarbonate:is usually used for overlays. It has more competitive price than PET so mostly used in products that styles improved frequently, such as microwave oven and toys , etc
| Material | PET(polyester),PC(polycarbonate) |
| Dimension | CorelDraw, Adobe Illustrator AI or EPS, AutoCAD Dwg or DXF |
| Color | Pantone and RALcolor matching system. |
| Rear Adhesive | 3M467,3M468,3M9448 ect |
| Features | 1)with metal dome, |
| 2)Key:embossed or flat | |
| 3)screen printing | |
| 4)with clear or transparent window | |
| 5)glossy surface or matte surface | |
| 6)Standard Tolerances:+/- 0.10inch(+/-0.25mm) |
Parameters:
Electrical
Operating Voltage: 0-35 V DC.
Operating Current: 100 MA Max.
Operating Contact Resistance: Less than 100 OHMS typical
Contact Bounce: Less than 5 Milliseconds typical.
Conductors: Printed silver conductive inks or carbon blend.
RFI and ESD Shielding: Available in most configurations.
Mechanical
Life Expectancy: 1,000,000 actuations per switch position
Actuation Force: 6-24 ounces, Range depending on customer specification.
Switch Travel: .005" to .030" typical.
Overall Thickness: .020" to .050" typical.
Environmental
Storage Temperature: -40 C (-40 F) to +70 C (158 F).
Storage Altitude: Sea level to 35,000 feet.
Operating Temperature and Altitude: -30 C (-30 F) to +75 C (170 F). Can be
designed to operate in most environments.
Humidity: No delamination after 24 hours at 80 C and 90%RH.
