These beads are coated with a special coating materials, during the manufacture of the glass beads, which will improve the characteristics of moisture-proof and adhesion of glass bead. In the way, the life cycle of the glass beads can be prolonged and this enhances the beads reflectivity in a rainy night. These beads are usually used in white or yellow line-construction of highway.
The glass bead can be produced based on the standard of countries or areas, such as EN1423/1424, AASHTO M247, BS6088, JIS R3301 and KS L2521 etc.
Dual Coated Glass Beads,Dual Coated Glass Beads Roadmarking,Reflective Dual Coated Glass Beads,Dual Coated Glass Beads Traffic Paint CHIYE GLASS BEAD (HEBEI) CO., LTD , https://www.chiyeglassbeads.com
Characteristics of raw materials:
1. Colorless and transparent, the light transmittance is 90%---92%, strong toughness, more than 10 times larger than silicon glass.
2. Excellent optical, wicking, processability and weather resistance.
3. Dissolved in organic solvents such as carbon tetrachloride, benzene, toluene dichloroethane, chloroform and acetone.
4. It has high transparency and brightness, good heat resistance, and is tough, hard and rigid. The heat distortion temperature is 80 °C and the bending strength is 110Mpa.
5. Density 1.14 - 1.20g / cc, deformation temperature 76 - 116 ° C, molding shrinkage 0.2 - 0.8%.
6. Linear expansion coefficient 0.00005—0.00009/°C, heat distortion temperature 68--69°C (74--107°C) 
Brief description of the properties of acrylic (PMMA) plastic materials