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3M™ Glass Bubbles K20HS are hollow microspheres made of soda-lime borosilicate glass with a true density of 0.20 g/cm³ and an isostatic crush strength of 750 psi / 52 bar.
The K20HS Glass Bubbles can be compounded in a variety of thermoset polymers to reduce the density of the composite. These composites can be incorporated into deep sea syntatctic foam for buoyancy modules to improve the uplift properties of a system at minimal foam volumes. They offer good strength-to density ratio, making them suitable for a variety of applications: buoyancy, coatings, adhesives, sealants, and thermoset resins systems.
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FINE POWDER PASTE EXTRUSION RESIN DESIGNED FOR HIGH QUALITY TUBING AND WIRE & CABLE INSULATION
3M™ Glass Bubbles XLD3000 are hollow glass spheres with a typical density of 0.23 g/cc and an isostatic crush strength of 3,000 psi.
3M™ Glass Bubbles K42HS have a density of 0.42 g/cc and an isostatic crush strength of 7,500 psi.