Foams are generated by forming gas bubbles in a liquid base which then begins to set over a short period of time, and the properties of the liquid and gas determines the final foam structure.
The distinction between Closed Cell and Open Cell Foam
- Closed cell foam – the bubbles are completely encompassed within the liquid and when it sets, the gases are entirely fixed within each individual bubble, creating a structure that is impervious.
- Open cell foam – the bubbles burst during the foaming process to create and interconnection cellular network. This gives rise to softer and breathable foams.
- Semi-Open Cell foam – this is created by physically bursting the closed cells to create a more open cell product which is softer and easier to compress.