Hallow Glass Bubbles

The glass hollow microspheres are used as fillers in composites, in particular in SMC / BMC compounds and in some epoxy resins.

Also called glass bubbles, are typically used as alternatives to conventional fillers and additives such as silica, calcium carbonate, talc, and clay.

Low density microspheres are lightweight and strong, which allows formulators and manufacturers to reduce the density and dramatically decrease the weight while improving dimensional stability and impact strength of the finished products.

Hollow microspheres can have half or quarter of the weight and proportionally more volume compared to solid fillers and significantly reduce the weight of the final product without compromising the physical strength and integrity.

It can be used in paint and coatings, rubber, plastics, FRP, artificial stone, putty and other products as filler and weight-reducing agent.  Because of its high compressive properties, it can be used to produce high-strength, low-density cement slurry and low-density drilling fluid in oil and gas extraction industry.

The addition is normally about 10-20% of the total weight.
Adding methods are proposed as follows:

The hollow glass microspheres are proposed to add at the last step, and dispersed with low-speed, low shearing force mixing equipment. Due to its good liquidity, small friction, so it will easily dispersed into mixture to completely keep wet within a short time. Through slightly extending mixing time can achieve uniform dispersion. Hollow glass microspheres are inert and non-toxic. Due to its light weight, attention should be specially paid when adding.

We recommend adding the microspheres by step, that is, the addition quantity is 1/2 of the  remaining beads each time. It can well avoid the microspheres floating into the air and make it disperse even more completely.