China Road Marking Glass Beads - High-Quality Reflective Materials from Reliable Suppliers and Factory
The following chemical composition values are typical reference ranges for soda-lime road marking glass beads. Actual values may vary slightly according to raw materials, production batch, customer standard, and customized grade. WANCHENG MINERAL can provide batch inspection documents according to customer requirements.
| Chemical Component | Typical Range | Function |
|---|---|---|
| SiO₂ | 65-75% | Main glass network former |
| Na₂O | 10-18% | Improves melting and glass formation |
| CaO | 5-12% | Improves hardness and stability |
| MgO | 0-5% | Improves durability |
| Al₂O₃ | 0-5% | Improves chemical stability |
| K₂O | 0-3% | Auxiliary flux component |
| Fe₂O₃ | ≤ 0.5% | Controlled for appearance and transparency |
Frequently Asked Questions
Silicon Dioxide (SiO₂) is the main constituent, typically accounting for 65% to 75% of the total composition. It functions as the primary network former, determining the fundamental strength, structural integrity, and optical quality of the beads.
Fe₂O₃ is tightly controlled because excessive iron content causes discoloration (yellow or greenish tint) in the glass, which severely reduces light transparency and retro-reflectivity on road markings.
Calcium Oxide (CaO) and Magnesium Oxide (MgO) enhance physical hardness, chemical resistance, and weather durability, preventing the glass beads from easily wearing out or degrading under harsh traffic and climate conditions.
Yes, formulations can be tailored to meet diverse international road authority standards (such as EN 1423/1424, AASHTO M247, or specific customer requirements) depending on production batch and grade requirements.
Yes, WANCHENG MINERAL provides comprehensive batch inspection documents and Certificates of Analysis (COA) to guarantee chemical compliance, particle sizing, and quality assurance.
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