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Excellent optical properties
TOPAS® possesses optical properties comparable with PMMA and superior heat resistance to PC. Moreover, it possesses excellent dimensional stability due to the fact that it absorbs almost no moisture. These attributes have earned the resin a high evaluation in the optical market sector
| Excellent optical properties |
unit |
TOPAS®5013 |
PC |
PMMA |
| Light transmission* |
% |
91 |
87-89 |
91-92 |
| Refractive Index |
- |
1.53 |
1.59 |
1.49 |
| Abbe number |
- |
58 |
30-31 |
57-58 |
| Birefringence |
nm |
<20 |
<65 |
<20 |
| Stress Optical Constant |
10-12Pa-1 |
-2 to -7 |
66 to 70 |
-4.5 to -4.8 |
| Saturated Water absorption |
% |
0.01 |
0.2 |
0.3 |
*Testing Method: ISO 13468-1
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Water Vapor Barrier Properties
TOPAS® possesses a very high water vapor barrier, and development is underway in the medical and packaging fields.
|
| • |
Safe Material
TOPAS® is a very safe material, and basic grades are registered under the U.S. FDA and U.S. Pharmacopoeia XXIII,Class VI. Interest is therefore growing in the medical / diagnostic device sector.
|
| • |
Electrical properties
TOPAS® exhibits excellent electrical properties at high frequencies, and development of antennae and other electronic device applications is anticipated.
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Characteristics
