Spinneret plate with e.g. trilobal or multi-arm bores for fleece manufacture has rows of bores with differing orientation from one row to the next

摘要

One row (2) has bores with differing orientation from those of the next row (7). There are two or more types of bore (3). The plate is divided into two regions (11, 12). In the first and second regions, two or more rows have similar bores. Bores are rotated through 180 degrees between the two regions. The regions are separated by a gap (14). The gap is no less than the spacing between two rows of similar bores. Plates are made up adjacently into a spinning pack, with various types, sizes and orientations of bores. These are used in a machine manufacturing spun fleece by polymer extrusion, assisted by gas cooling. An Independent claim is included for the corresponding method of cooling and/or stretching molten polymer material, when spinning fleece material.