Glass beads is as an important reflective material in the road marking, can better improve the reflective properties of the road marking coating, thus enhancing the safety and security of night driving, when the car is driving at night, the headlights shine on the road marking with glass beads can use the headlights off line have parallel reflection back, so that the driver can see the direction of advance, improve the safety and security of night driving.
When choosing the glass beads for road marking, we should choose the glass beads with suitable grain size, stable quality, and in line with the project requirements and economic benefits according to the standard and actual situation of different road marking projects. Glass bead appearance selection: according to different road marking construction requirements, try not to use gray, dark opaque glass beads, to choose the white marking glass beads with less impurity content and clear color.
The higher the transparency of the glass beads the less impurities, the less energy loss when the luminous light enters the glass beads. When the vehicle is running on the road, the reflective effect of the marking line is better.
From the perspective of the actual production process of glass beads, the rounding rate of formed glass beads is about 80%-85%, the higher the rounding rate of glass beads, the better the reflective performance at night. The input rate directly affects the return reflection ability of the marking.
In the choice of marking glass beads refractive index, the higher the refractive index of marking glass beads, the better the reflection effect. According to GBT24722-2009 standard, it can be divided into low refractive index (1.50≤RI<1.70), medium refractive index (1.70≤RI<1.90) and high refractive index (RI≥1.90) glass beads.
(1) Epoxy polyester type
Simple processing, solvent-based two-component marking coating, slow curing time, low cost, poor strength, low film thickness, poor anti-fouling properties. Large amount of VOC emission, does not meet the requirements of environmental protection.
High performance, higher price and less application. Its variation: epoxy - polyurethane two-component, etc.
That is, methyl methacrylate (MA) monomer, controlled drying time, good adhesion, processed by MA monomer and PMA mixture.
The product of pre-polymerization in the factory using MA monomer, called polymethyl methacrylate (PMA) resin, no emissions and volatilization, in line with environmental requirements, belongs to environmentally friendly products.
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The Use and Function of Glass Beads