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In foam extrusion, process parameters, material properties, and the blowing agent have an influence on the resulting foam properties. For safety and environmental reasons, carbon dioxide (CO2) has gained importance as a physical blowing agent for the production of low‐density polystyrene foam sheets. The sole use of CO2 often leads to corrugation, open cell structures, or surface defects on the foam...
Existing technologies for polyurethane (PU) foaming in discontinuous moulding processes show several disadvantages regarding the achievable foam properties like a limited flexibility of lightweight flexible foams. In contrast, the use of carbon dioxide (CO 2 ) as a physical blowing agent offers advantages regarding its inert properties. But up to now, it was not possible to use CO 2 ...
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