| 摘要 |
The invention relates to a method for determining at least one layer property of a layer to be determined, in particular of a foam layer (16), in an extrusion process, wherein a feed material (7) is at least partially foamed and an extrusion product (2) having the foam layer (16) is output, comprising at least the following steps: a) irradiating the extrusion product (2) with electromagnetic radiation (S), b) performing an electromagnetic measurement at least of radiation (R) that has passed through the foam layer (16), c) measuring at least one feed rate or feed amount of the feed material (7), and d) determining at least one material property of the layer (16) to be determined from the measured feed amount (z) and the electromagnetic measurement. |
