| 摘要 |
A spinneret plate is described with a plurality of apertures through which a molten thermoplastic material may be extruded for the production of self-crimping thermoplastic filaments. On the face of the spinneret plate against which the molten thermoplastic material is urged in the extrusion process, the apertures (1) have a shape with an incomplete periphery, such as a "C" shape or swastika shape, and the shape of the apertures (2) on the face of the spinneret plate at which the extruded material reports is of complete periphery, for example circular or square apertures. The entrainment of air as the thermoplastic material is extruded creates a void (4) internally of the filament which collapses as said material reports from the apertures of the spinneret plate and is immediately cooled. This causes the fibres to self-crimp which is of great advantage - current machinery to induce crimp is expensive and cumbersome. |
