| 摘要 |
A co-extrusion product with a predetermined cross-section and preselected outer shape consists of at least two streams or layers of material of different colours which form at least one pattern and whose axis extends in a substantially parallel direction to the direction of extrusion. The co-extrusion product is characterised in that at least one inner partial stream (3, 4, 5) changes the form of its cross-section in the direction of extrusion (7). Also disclosed is a process for producing a co-extrusion product and a device for carrying out the process. |
