Welex Inc.'s custom nine-extruder, five-layer sheet extrusion system makes multicolored striped sheet for thermoformed yogurt cups.
The Blue Bell, Pa.-based company built the line for a leading European custom sheet extruder, which it did not identify. The nine extruders can be configured to provide virtually unlimited multiple stripe and layer combinations, Welex said.
The system produces sheet up to 60 inches wide, with a thickness range of 0.02-0.06 inch, at a rate of 3,000 pounds per hour. The nine extruders have screw diameters of 2½ and 3½ inches.
The five-layer sheet construction includes a crystal polystyrene gloss layer, a fully configurable five-color stripe layer, a white layer, a scrap-foam layer and a white-bottom layer. The scrap-foam layer is made using a proprietary gas-blown foam process.
The system also can run polypropylene with no equipment changes.