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 Characteristics of reflective glass beads

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Characteristics of reflective glass beads

Reflective glass beads are solid glass spheres with small diameter. They are made of glass powder composed of silicon, sodium and calcium and fired at high temperature. Because of its high roundness, good hardness, strong wear resistance and directional reflection, it has been widely used in the fields of plastic rubber, wear-resistant floor, shot peening, road reflective coating and so on.

Parameters

Appearance clear,round,smooth,without any impurity
SiO2 >67%
CaO >8.0%
MgO >2.5%
Na2O <14%
Al2O3 0.5-2.0
Fe2O3 >0.15
others 2.00%
specific gravity 2.4-2.6g/cm3
bulk density 1.5g/cm3
Mohs hardness 6-7mohs
HRC 48-52
Roundness >90%

Application of reflective glass beads

Reflective glass beads for roads are mainly used in normal temperature and hot-melt ordinary marking operations. They are sprayed on the marking paint. One is used as premixed material to ensure long-term reflection of the marking within the service life, and the other is distributed on the surface during marking construction to achieve reflective effect.

Selection recommendation: fine beads are generally used for double track of old lines, with remarkable effect; coarse beads are generally used for new road marking, with ideal effect; high bright beads are generally used for Expressway marking, with excellent reflective effect.

There are three standards according to the rounding rate: 220 bright glass beads (a, b)

150 selected glass beads (a, b)

Ordinary glass beads (economical)

There are two specifications according to the size of micro beads: a beads: 20-40 mesh (large beads)

B bead: 20-50 mesh (medium bead)


Post time: Sep-06-2021