AASHTO M247 I Reflective Glass Beads

I. Role of Reflective Glass Beads

Reflective glass beads are the core retroreflective material in thermoplastic road marking paint, serving critical functions:

• Nighttime visibility: Reflects vehicle headlights via retroreflection, enhancing line visibility in low-light conditions for thermoplastic road markings.
• Durability: Embedded beads reduce wear, extending the lifespan of thermoplastic road marking paint.
• All-weather safety: Maintains visibility in rain, fog, or extreme weather, reducing accident risks.

II. Reflective Glass Beads Advantages

• High refractive index (1.5): Exceeds standard materials, ensuring superior reflectivity for thermoplastic road marking paint.
• Weather resistance: Withstands -40°C to 200°C, UV rays, acids, and alkalis, ideal for harsh environments.
• Eco-friendly: Complies with AASHTO M247 I, RoHS, and REACH standards, free from heavy metals.
• Easy application: Directly compatible with thermoplastic road marking paint, requiring no additional processes.
• Cost-effective: Low usage (15–30% of paint weight) reduces long-term maintenance costs.

III. Features of Reflective Glass Beads

• Material: High-purity soda-lime glass with 80% sphericity for uniform light reflection.
• Surface treatment: Optional silane coating enhances adhesion to thermoplastic paint.
• Particle size: 150–1180μm (AASHTO M247 I compliant), customizable for highways (e.g., 300–600μm).
• Density: 2.4–2.6 g/cm³ for stable suspension in thermoplastic road marking paint.

IV. Technical Parameters

V. Precautions for Reflective Glass Beads

• Storage: Seal in dry conditions; avoid moisture and corrosive substances.
• Application:
• Mixing ratio: 15–30% with thermoplastic road marking paint (excess causes roughness).
• Temperature: Apply paint at 180–220°C to avoid bead melting.
• Timing: Spread beads before curing (50–70% embedment depth).
• Safety: Workers must wear PPE; dispose of waste as industrial solids.

VI. Summary

Reflective glass beads are essential for thermoplastic road marking paint to achieve all-weather safety and durability. With a refractive index of 1.5, AASHTO M247 I compliance, and 80% sphericity, they ensure high visibility and cost efficiency.

BOLE Road Marking Solutions offers customized reflective glass beads for thermoplastic road marking paint, compliant with global standards.

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