The main feature of this composite material is the low density, is a mechanical properties, set vibration, insulation, fire in one of the multi-functional synthetic materials. At present, it is mainly used in the field of aerospace and shipbuilding. The addition of hollow glass beads to the synthetic foam not only has a porous structure, but also has a low hygroscopicity and a high compressive strength due to the obturator structure of the microbeads.
Composite foams are made of hollow glass microspheres filled with polymer matrix and are often referred to as synthetic foams. The density of the conventional foam is easy to reach 0.01 to 0.10 g / cm3, but there is a drawback that the strength is poor and the chemical foaming process is difficult to control.
