3M™ Glass Bubbles S32 have a density of 0.32 g/cc and an isostatic crush strength of 2000 psi. The S Series glass bubbles have smaller particle sizes than the K Series.
The thermal conductivity of 3M S32 glass bubbles is approximately 0.10 W·m-1·K-1 at 70°F (21°C). This low thermal conductivity contribution to syntactic foam pipe coatings makes S32 glass bubbles an ideal additive in insulation coatings for pipelines and production risers. The 2000 psi test strength of S32 glass bubbles means they can survive both the rigorous demands of processing and the Full Text . . .
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