MANUFACTURING METHOD FOR MULTI-LAYERED BODY MANUFACTURING EQUIPMENT FOR SAME AND MULTI-LAYERED BODY

摘要

A method for producing a multiple layered product of the present invention is a method for producing a double layered product comprising at least two molten resins arranged in the longitudinal direction so as to divide the adjacent laminated flow into two parts vertically and divide the divided laminated layers in the opposite direction toward the flow direction, (L flow path) for guiding the molten resin toward the center of the flow direction and rearranging adjacent to each other in the left and right direction to merge the molten resin; (R-flow path) for guiding the divided laminated flows toward the flow direction in a direction opposite to that of the flow direction, then guiding them toward the center of the flow direction, rearranging them adjacent to each other in the left- Step 1 (L flow path) and Step 1 (R flow path) are alternately repeated in this order in at least three steps or more. According to this method, the disappearance of the layers at both end portions is suppressed, the thickness irregularity of the layer or collapse of the longitudinal arrangement is suppressed, and it is possible to manufacture a multilayered structure having more excellent uniformity.