Multi-layer film / sheet manufacturing apparatus, multi-layer film / sheet manufacturing apparatus, and multi-layer film / sheet manufacturing method

摘要

PPROBLEM TO BE SOLVED: To provide a method and an apparatus for manufacture of a multi-layer film sheet having a good uniformity of layers with less unevenness of each layer and giving a high degree of freedom for arrangement of layers. PSOLUTION: The method comprises the supply of a resin flow to a confluence device from the first extruder, supplying one or more resin flows for lamination to the confluence device from another extruder(s), while forming the first cylindrical resin flow in the confluence device, joining the resin flows for lamination with the first resin flow through each annular manifold surrounding one of the first resin flow so as to form a concentric annular laminar flow and guiding the ring laminar flow, directly or after flat collapsing, to a T die arranged on the outlet side of the confluence device to extrude from the T die in the form of a film or a sheet in order to obtain a multi-layer film sheet. PCOPYRIGHT: (C)2007,JPO&INPIT