Lenticular Micro-Lens Sheet Gets Much Bigger

A system to make lenticular acrylic sheet for billboard advertising, which started up in China in April, is believed to be the first lenticular line for a large display application.

A system to make lenticular acrylic sheet for billboard advertising, which started up in China in April, is believed to be the first lenticular line for a large display application. Micro Lens Technology Inc., Matthews, N.C., developed the lens geometry—the size and spacing of lens ridges—which are determined by the intended distance of the viewer from the sheet. Finely ridged lenticular sheet for holograms on greeting cards and point-of-purchase displays, which are seen from a few inches or feet away, might have 30 to 60 lenses per inch. Billboard sheets, to be seen from hundreds of feet away, have 10 lenses/in. The sheet line was built by PTi Processing Technologies Inc., Aurora, Ill., with a 5-in., 32:1, 300-hp extruder, screen changer, gear pump, and static mixer. The sheet is precisely trimmed with a digitally controlled, traveling circular saw from the Sakas Div. of Nutter Machine in Hebron, Ohio, and is masked with film in-line to protect the ridges.