- DP302 is one of the broadest and highest-functional diaphragm sheet in the world.
- It's possible to use stably over a long duration because of excellent durability against EVA gas which causes hardening and break of diaphragm sheet.
- Item Number DP302
- Material / Color Synthetic rubber / Black
- Dimension
| Thickness (mm) | WidthMain Functions (mm) | Length (mm) |
| 3 | < 3,000 | < 6,000 |
* We can produce other dimensions according to your request.
Please contact us about details.
Physical properties
| Hardness | Tensile strength |
Elongation | 100% Tensile stress |
Tear strength | |
| Unit | Type A | MPa | % | MPa | N/mm |
| Measured value |
62 | 12.1 | 550 | 1.4 | 30 |
* Above data are measured values and not guaranteed specifications.
◼ Lifetime of Diaphragm
PV diaphragm module hardens its surface by the influence of release gas from sealing medium (EVA) after repetitive use and results in crack or break after losing elasticity.
As showing in left figure, surface hardness is becoming 80 or more (displayed in yellow) around the broken part by exposing release gas.
If we bend this part, it cracks easily. But it does not crack at the hardness of less than 80 (displayed in dark blue).
We can say that 80 of surface hardness will become a criterion of lifetime of diaphragm sheet.
◼ Evaluation test of EVA resistance.
We repeat this process and measures surface hardness after a number of processing.
It shows the life-time becomes longer.
