| 摘要 |
<p>1467362 Laminates VAN DAALEN PATENTS NV 15 July 1974 [23 July 1973] 31188/74 Headings B5N and B5A A method of making sheet synthetic material, one face of which is printed, comprises the steps of forming by co-extrusion a laminate comprising a first layer of unused plastics material and a second layer of waste material of the same kind and bonding a printed foil to the layer of waste material, the printed foil being of the same materials as the layers. The plastics material may be of polystyrene. The sheet may be deep drawn to form a shaped article, e.g. a cup.</p> |
