Patent ID: 11890793
Assignee: BASF SE
Field: Other special machines (Mechanical engineering)
Classification: CPC B  F  Y | IPC B  F

Claim 15:
16. The process according to claim 1, wherein the foam has been produced from an extruded foam produced in a process comprising the following steps:
I) providing a polymer melt in an extruder,
II) introducing at least one blowing agent into the polymer melt provided in step I) to obtain a foamable polymer melt,
III) extruding the foamable polymer melt obtained in step II) from the extruder through at least one die aperture into an area at lower pressure, with expansion of the foamable polymer melt to obtain an expanded foam,
IV) calibrating the expanded foam from step III) by conducting the expanded foam through a shaping tool to obtain the extruded foam, and
V) optional material-removing processing of the extruded foam obtained in step IV),
wherein
i) the polymer melt provided in step I) optionally comprises at least one additive, or
ii) at least one additive is optionally added during step II) to the polymer melt or between step II) and step III) to the foamable polymer melt, or
iii) at least one additive is optionally applied during step III) to the expanded foam and/or during step IV) to the expanded foam, or
iv) at least one layer (S2) is optionally applied to the extruded foam during or directly after step IV), or
at least one carrier layer (TS) is optionally applied to the extruded foam during or directly after step IV).