Brief Introduction of Expandable Microsphere The color of the expandable microspheres is white. Its average particle size is 10-30 μ m. Its average density is about 1100 kg / m 3 . It has a thermoplastic shell comprising a low boiling liquid hydrocarbon. When the thermoplastic shell is softened at elevated temperatures, the increased pressure of the hydrocarbon will cause the microspheres to expand 40 to 100 times. When the internal pressure of the microsphere, the shell tension and the external pressure reach equilibrium, the microspheres no longer expand. Expandable microspheres have become the world's lightest application because the density of expanded microspheres is less than 30 kg / m3 (0.03 g / cm3). Characteristics of Expandable Microsphere The first feature is cost savings. In thermoplastic materials such as PR, PP, PVC, PET, TPR, TPU, TPV, PA and paper/paperboard, expandable microspheres can be used as lightweight fillers and blowing agents. Expandable mic...
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