Process for the production of relief images

Details Process for the production of relief images Process for the production of relief images

1986-10-02

1988-04-12

Sever, Frank

Plastic and nonmetallic article shaping or treating: processes

With printing or coating of workpiece

Applying indicia or design

264134, 264153, 264293, 264321, C04B 4100

Patent

active

047373296

ABSTRACT:
A process for the production of relief images, especially of postcards, greeting cards or the like, wherein a relief is embossed into a polystyrene foam substrate by pressing a heated embossing die against the substrate. A pictorial and/or graphic illustration is applied to the substrate on at least one side thereof, preferably by screen printing. The illustration can be on paper which is applied to the foam sheet. The embossing die is heated to a temperature between 100.degree. and 130.degree. C., preferably 110.degree.-120.degree. C., and is applied agianst the foam with a pressure of at least 0.5 kg/cm.sup.2 while flatly supporting the foam sheet from the opposite side. The foam sheet has a thickness of 1-3 mm, preferably 1.5-2.0 mm. The substrate can be coated with a clear varnish after the imprinting step and before the embossing step. After the embossing step, the relief thus produced can be separated from a larger portion of the plastic foam sheet. This separation can be effected by a blade having the same temperature as the embossing die used for the embossing step.

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