Laminations

Abstract

Abstract 1,151,772. Laminates. INTERNATIONAL POLAROID CORP. 29 April, 1966 [29 April, 1965], No. 19034/66. Heading B5N. [Also in Division G2] A laminar structure comprises a generally planar information-bearing surface which comprises a photographic print and which is laminated to a substantially transparent sheet-like element at least a portion of the surface area of which is light polarizing . The information-bearing surface which may also carry lettering may be of paper, wood or metal. Specified lightpolarizing materials are oriented polyvinyl alcohol containing metal, metal complexes, iodine or dichroic dye, partially dehydrated polyvinyl alcohol, oriented cellulose stained with dichroic dye, cellulose acetate containing dichroic crystals, hydrolysed cellulose acetate and glass carrying an oriented dichroic dye. The photograph may be of the silver transfer type supported on polyvinyl alcohol. Bonding may be effected by pressure-sensitive adhesives e.g. butadiene-acrylonitrile copolymers, epoxy based adhesives, cyanoacrylate polymers or a copolymer of methyl vinyl ether with maleic anhydride. A transparent layer e.g. of polyvinyl chloride, blends of polyvinyl chloride with polyvinyl acetate, copolymers of vinyl chloride with vinyl acetate, polystyrene or glass may be bonded to the polarizing element. The laminates may be embossed. In the embodiment of Fig. 5, only a portion 14 of the transparent layer is stained with a dichroic dye.

Inventors

• 👤 Robert L Malster

Bibliographic Details