3M™ Glass Bubbles K42HS are high-strength polymer additives made from a water-resistant and chemically stable soda-lime borosilicate glass. These hollow glass microspheres can be used as a low-density filler material that is ideal for plastic and rubber parts created from injection moulding, extrusion processes, and/or other vigorous processing equipment.
3M™ Glass Bubbles can help to reduce weight; reduce noise, vibration and harmonics; reduce thermal expansion; and contribute to cost savings. They are used in a variety of applications in diverse markets, including automotive, construction materials, electronics, marine and paints and coatings.
Appearance (Unaided Eye) | White Powder |
Composition | Soda-lime Borosilicate Glass |
Crush Strength (Imperial) | 7500 psi (90% Minimum Fractional Survival) |
Crush Strength (Metric) | 51.71 MPa (90% Minimum Fractional Survival) |
Shape | Thin-walled Hollow Spheres |
Typical Density | 0.42 g/cm³ |
Typical Median Particle Diameter | 22 µm |