High Reflective Glass Beads are produced by a brand-new "glass melting granulation method" process, which is to melt specially prepared optical materials into glass liquid, and then pump the glass liquid into glass rods according to the required particle size of the glass beads, and then perform high-temperature cutting and granulation. , The glass beads produced by this process are excellent in roundness, purity, transparency, uniformity, coating layer and other aspects. The marking line constructed with this glass bead has a retroreflective coefficient compared with the traditional marking line. Significantly improved (up to ≥500mcd/lux/m2) and has a certain rainy night visibility, becoming a veritable all-weather marking.
Product Features
1. Colorless, transparent or light blue pure particles, without obvious bubbles and impurities.
2. Uniform spherical individual, good fluidity and easy construction.
3. The distribution of grains is accurate and adjustable, which can meet the requirements of different standards and specifications.
4. Stable chemical composition and good weather resistance.
5. The rounding rate is more than 95%, and the retroreflective performance is extremely excellent.
6. The test retroreflective coefficient under laboratory conditions requires more than 600mcd to be allowed to leave the factory
7. With continuous reflection function in dry and wet state
8. It can be firmly combined with various coatings, and has excellent anti-fouling and drainage performance.
9. Continuous industrial production, stable and reliable product quality.
Chemical Composition：
|
SiO2 |
71-74 |
|
Al2O3 |
≤1.8 |
|
CaO |
6-10 |
|
MgO |
3-5 |
|
Na2O |
12-15 |
|
K2O |
≤1 |
|
Fe2O3 |
≤0.3 |
|
SO3 |
≤0.3 |
Physical Property：
|
Density |
2.4- 2.6 g/cm3 |
|
Bulk Density |
1.50 - 1.60 g/cm3 |
|
Refractive index |
1.50 - 1.52 |
|
Roundness（%） |
≥98 |
|
Soften point |
720-730℃ |
|
annealing temperature |
550℃ |
|
thermal expansivity |
9-10Χ10-6/℃ (0-350℃) |
|
Hardness（Mohs） |
5.5-6.5 |
