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Engineered Syntactic Systems(ESS)
Microsphere Syntactic Foam:
Microsphere syntactic foam is comprised solely of resin and hollow glass microspheres. These spheres have an average diameter of between 10 and 100 microns, giving the syntactic a solid white appearance to the naked eye. Typically provided in block form, this isotropic material is available in a range of densities and is formulated to meet depth and buoyancy requirements down to 10 000 meters.
Blocks may be bonded to form larger structures or machined to a final shape. Machined surfaces are smooth and do not require an additional coating to prevent water absorption at depth, but are often skinned or coated for visibility or to protect the surface from impact.
Macrosphere Syntactic Foam:
Macrosphere syntactic foam integrates larger fiber-reinforced spheres (average diameter of 0.1875 inches or 5mm) into the syntactic structure, thereby attaining lower densities in certain applications. Ideally suited for fabrication of larger standard sizes and custom structures, Macrosphere syntactic foam generally equates to lower cost buoyancy for a given depth. Macrosphere foams are available in standard off-the-shelf sheets and near-net-shape or finished geometries.
Like the Microsphere syntactic foam, Macrosphere blocks may also be bonded to form larger geometries or machined to a final shape. Machined surfaces have exposed cut macrospheres, but the systems are designed to resist water ingression, even with direct exposure. However, many customers fill and skin these surfaces to form a smooth outer shell.