| 摘要 |
<p>762,921. Fabrics composed of adhesivelyunited threads. MINNESOTA MINING & MANUFACTURING CO. Oct. 7, 1954 [Oct. 7, 1953], No. 28975/54. Class 140. A non-woven decorative picot ribbon comprises a flat filament layer formed of a large number of continuous lineally aligned viscose rayon filaments to which is bonded a superimposed open mesh layer formed of continuous lineally directed sinuous cellulose acetate monofibres mutually offset and fused together at their crossing-points to form a network with a lineally repetitive pattern with loops extending beyond the sides of the filament layer to provide the ribbon with pearl edges. The lineallyaligned viscose filaments are of hair-like fineness and are much finer than the mono-fibres of the open-mesh layer. They may extend uniformly across the width of the filament layer or constitute two or more separate stripes. They may be present in the form of twisted yarns or in the form of tows that are spread out. They may be coated with a water-resistant organic-polymer binder sizing, such as a vinyl resin, which may be included in a dye bath and the filaments simultaneously dyed and coated. The superimposed open-mesh layer is preferably contageously bonded to the flat filament layer. A large number of viscose-rayon continuous filaments forming a tow 1, are drawn over and under a series of smoothing bars 2, then pass between two teeth of the positioning rake 3 and then over the coating roll 4 which clips into the bath 5 which contains dye and sizing resin dissolved in a volatile solvent. The filament strip is then drawn under positioning bar 8 where it meets the upper surface of the endless carrier belt 9 as it passes over supporting roll 10. A vertical spinneret head 14 is mounted above the carrier belt and is fed with a viscous cellulose acetate solution through a tube 15. The spinneret extruder, which has five holes uniformly spaced in a straight line parallel to the direction of motion of the carrier belt, is reciprocated transversely of the belt. The freshly formed ribbon 16 passes on the carrier belt through drying oven 11 and at 17 it is drawn towards a wind-up roll (not shown). Different structural designs can be achieved by varying the relative speeds of the spinneret and the carrier belt, the mode of reciprocation of the spinneret, the number and arrangement of the extrusion holes, the distance of the spinneret above the belt and the viscosity of the extrude solution.</p> |
