Silicone Properties
Typical Physical Properties of Silicone Rubber
| CSI
Keyboards |
Conductive
Rubber |
Insulative
Rubber |
|
70 |
45 |
55 |
70 |
| Hardness,
Shore A |
60-70 |
50 |
55 |
70 |
| Tensile,
p.s.i. |
650 |
950 |
1000 |
1000 |
| Elongation,
% |
100 |
300 |
300 |
450 |
| Tear
Strength, p.p.i. (DieB) |
- |
140 |
150 |
225 |
| Volume
Resistivity, ohm-cm |
8 |
- |
- |
- |
Tolerances
Overall size and dimensions after shrinkage
|
<.400"
(10.16 mm) |
+/-.004"
(.1016 mm) |
|
.401"
- .800"
(10.16 mm - 20.32 mm) |
+/-.006"
(.1524 mm) |
|
.801"
- 1.20"
(20.34 mm - 30.48 mm) |
+/-.008"
(.2032 mm) |
|
1.201"
- 1.60"
(30.50 mm - 40.64 mm) |
+/-.010"
(.254 mm) |
|
1.601"
- 2.00"
(40.66 mm - 50.8 mm) |
+/-.012
(.3048 mm) |
|
>2.001"
+
(50.82 mm) |
+/-.6% |
|
