초록 ▼

What is disclosed is a light-transparent body comprising a first coextruded layer of a first extrudable light-transparent synthetic resin and a second coextruded layer of a second extrudable light-transparent synthetic resin different from said first resin, wherein said first and second coextruded l

What is disclosed is a light-transparent body comprising a first coextruded layer of a first extrudable light-transparent synthetic resin and a second coextruded layer of a second extrudable light-transparent synthetic resin different from said first resin, wherein said first and second coextruded layers are adjacent and wherein at least said first layer contains a dyestuff capable of fluorescing in the visible region and said second, adjacent, layer is free of the dyestuff present in said first layer.

대표청구항 ▼

A light transparent body comprising a first coextruded layer, at most 0.1 millimeter thick, of a first extrudable light-transparent synthetic resin and a second coextruded layer of a second extrudable light-transparent synthetic resin different from said first resin selected from the group consistin

A light transparent body comprising a first coextruded layer, at most 0.1 millimeter thick, of a first extrudable light-transparent synthetic resin and a second coextruded layer of a second extrudable light-transparent synthetic resin different from said first resin selected from the group consisting of a polycarbonate resin, polymethylmethacrylate resin and a synthetic copolymeric resin predominatly comprising methyl methacrylate, said first and second coextruded layers being adjacent, said first layer containing distributed homogeneously therethrough a dyestuff capable of fluorescing in the visible region under ultraviolet radiation, and said second layer being free of the dyestuff present in said first layer, whereby said first layer is detectible and distinguishable from said second layer when under ultraviolet radiation.