Hollow glass microspheres

3M Performance Additives (St. Paul, Minn.) has introduced what it says are the world's first hollow glass microspheres capable of withstanding injection molding and extrusion pressures of 30,000 psi/206.84 MPa. Dubbed iM30K, the microspheres are billed as an alternative to conventional additives/fillers, such as glass

3M Performance Additives (St. Paul, Minn.) has introduced what it says are the world's first hollow glass microspheres capable of withstanding injection molding and extrusion pressures of 30,000 psi/206.84 MPa. Dubbed iM30K, the microspheres are billed as an alternative to conventional additives/fillers, such as glass fiber, calcium carbonate and talc. The new additives are 40 percent stronger than 3M's previous high-strength glass microspheres and, at 17 microns, are approximately half their size.