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Hollow Glass Microspheres (HGMS) are near perfect engineered spherical bubbles of thin walled glass, that are approximately 50 microns in size, with a really low density of between 0.1-0.4 g/cc. The glass type is amorphous and can come low purity or high purity grades.
Hollow glass microspheres are typically used as a functional filler due to their light weight and strength properties.
Trelleborg applied technologies produce a premium grade of HGMS, called Eccospheres®, a high purity 99% Silica, chemically stable material, with increased functionality when compared to standard commodity grade HGMS.
Eccospheres® have been engineered to meet the demanding strength, weight and electrical specifications of our customers. With a near perfect spherical shape, to the naked eye they resemble a fine, white, free-flowing powder.
Eccosphere® HGMS material properties
Low dielectric properties
Low impact on viscosities
Option for custom modifications – moisture, density, particle size and coating
Inert internal gas that is non-resin corrupting
Long shelf life
Stable up to 900OC
The engineered glass spheres can be incorporated into a wide range of polymer and resin systems
Customized via surface treatments, material chemistry selection, density specifications, or particle size distribution
Tailored to meet demanding strength, weight and electrical specifications for customers in a variety of markets
General light weighting for aerospace compounds
Dielectric materials for signal transparent coatings, circuit boards, potting’s
Thermally and acoustically insulating coatings
An alternative to conventional fillers and additives such as silica, calcium carbonate, talc, and clay in low dielectric or thermally insulating applications