Patent ID: 7025926

Claim:
A method of extruding a continuous moulding making use of an extrusion solution, comprising: conducting the extrusion solution through an extrusion channel having a predetermined length and a predetermined diameter up to an extrusion-channel opening; extruding the extrusion solution through the extrusion-channel opening so as to form an extruded continuous moulding; conducting the extruded continuous moulding through an air gap having a predetermined air-gap height; accelerating the continuous moulding in the air gap; wherein: the continuous moulding, is accelerated to a controlled value of a _ = 10 δ · [ 1 β ] 0.3 averaged essentially over the air-gap height (H), wherein β is the ratio of the length (L) to the diameter (D) of the extrusion channel and wherein the value of the control parameter δ is at least 0.3.