Cellular structure of foam
Cellular structure of foam
Depending on the material type or material treatment, the cell structure is open, semi-open or closed.
Closed-cell foams are for example cellular rubber or cross-linked PE foams.
Open-cell foams are normally PUR foams. During subsequent material treatment, such as reticulation, the cell walls are removed through a controlled gas explosion, resulting in open or semi-open cells, e.g. in filter foams.
