Reflective Glass Beads for road marking&traffic sign,highway safty

Specifications 1.Blasting/grinding/polishing material

2.High quality/reasonable price

3.Good service

4.Many years experiences

1.Description Glass beads abrasive with their hardness and spherical form can remove impurities and metal oxides without damaging the treated surface. Glass does not react chemically with other material so that the micro-beads do not create any corrosion on the treated surfaces with no deposits of foreign substances.   2.Chemical component

ChemicalName &Synonyms	Soda-lime Silicate-Glass
Chemical Family	Silicate glass without free silica
Formula	SiO2	71-73%	Na2O	13-15%
	MgO	3-5%	CaO	8-10%
	Al2O3	0.5-2%	K2O	0.2-0.6%
Phusical Properties
Boiling Point N/A			Vapour Pressure   N/A
Percent Volatile by Volume Nil			Vapour Density N/A
Evaporation Rate N/A			Odour Nil
Refractive Index   1.52			Oil Absorption(ASTM)   17
Solubility in Water Not Soluble			Mohs       6
Absolute Specific Gravity(H2O=1)2.46			Knoop Load 100:515kg/mm2
Absolute Specific Gravity 1.6KG/dm3			Hardess DPH Load 50kg:540kg/mm2
Specific Heat Average 0.18kcal/mh°C			Dielectric Strength 4500kv/cm
Dielectric Constant 7.2(1MC at 20°C)			Exopansion Coefficient 8.5*10-6
Grades/Sizes:
Microns	Mesh	Inches	Sphere Count
590-840	20-36	.0234-.0331	0.65
420-590	30-40	.0165-.0234	0.7
250-420	40-60	.0098-.0165	0.7
177-297	50-80	.0070-.0117	0.8
149-250	60-100	.0059-.0098	0.8
105-210	70-140	.0041-.0083	0.8
74-149	100-200	.0029-.0059	0.9
53-105	140-270	.0021-.0041	0.9
44-88	170-350	.0017-.0035	0.95
30-62	270-500	.0012-.0024	0.95

  Contact person:Susan Wang Tel:0086-371-63691217 Fax:0086-371-63691212