EXPANCEL^® microspheres are small spherical plastic particles. The microspheres consist of a polymer shell encapsulating a gas. When the gas inside the shell is heated, it increases its pressure and the thermoplastic shell softens, resulting in a dramatic increase in the volume of the microspheres. When fully expanded, the volume of the microspheres increases more than 40 times.

EXPANCEL^® product range includes both unexpanded and expanded microspheres. Unexpanded microspheres are used as blowing agents in many areas such as printing inks, thermoplastics, paper & boards, nonwoven & many more.

The expanded microspheres are used as lightweight fillers in various applications such as cultured marble, body fillers, polyurethanes, paint, thermosetting materials, cable jelly and many more.

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Short animated demonstration
illustrating what happens when EXPANCEL^® microspheres are heated.