... foam board, adhesives, printed circuit board substrate, RTM, bowling, fan blades, emulsion explosives, golf, sealant, pipeline insulation materials, artificial marble, ... , but also improve the production efficiency by 15% -20%. A superior substitute of resin Hollow glass microspheres occupy ... density The density of hollow glass microspheres is usually 0.20 ~ 0.60g/cm3, and the density of mineral ...