Sand Blasting glass beads are used in cleaning the surface of all kind of metal products.
The glass beads made of the soda-lime silica glass has the good chemical stability, certain mechanical intensity and hardness, so it used as polishing and grinding material .Do not pollute the processing metal.,accelerate the cleaning up, make the processing material to restore originally clean, smooth.
Glass bead for sand blasting media 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.
Chemical Name & 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% | |
Physical 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 | Hardness DPH Load 50kg:540kg/mm2 | |||
Specific Heat Average 0.18kcal/mhoC | Dielectric Strength 4,500kv/cm | |||
Dielectric Constant 7.2(1MC at 20oC) | Expansion Coefficient 8.5*10-6 | |||
Grades/Sizes of glass bead for sand blasting media
Type | Mesh | Diameter(um) |
30# | 20-40 | 850-425 |
60# | 40-60 | 425-250 |
80# | 60-100 | 250-150 |
100# | 80-140 | 180-100 |
120# | 100-140 | 150-100 |
150# | 100-200 | 150-70 |
180# | 140-200 | 100-70 |
220# | 140-270 | 100-50 |
280# | 200-325 | 70-45 |
320# | <325 | <44 |
