What does «espuma alveolada» mean in Spanish?

Foam that due to its shape and material is a good thermal and acoustic insulator, and resistant to shocks and jolts. It is also used as decorative.

Examples of use in Spanish: "esta espuma alveolada sirve de aislamiento de golpes la máquina".

"la espuma alveolada tipo cáscara de huevo de poliuretano sirve como aislante acústico".