Preform and its production manner for the multilayer light-gage container and production manner null of the multilayer light-gage container which uses that

摘要

PURPOSE: To constitute the above manufacture so that a multi-layer-structure preform of at least three layers and a multi-layer-structure vessel whose layer thicknesses each are free from disorder can be manufactured inexpensively, furthermore the preform is made to extend easily even if a material hard to extend is contained. ;CONSTITUTION: This is a preform which is molded into a multi-layer thin vessel by a method wherein the preform is extended by being molding-processed and the preform for the multi-layer thin vessel which is formed by laminating injected resin layers 2, 3 to a sheet material 1 containing a resin layer having a specific function by injection molding and the injected resin layers 2, 3 are laminated on both surfaces of the sheet material 1.;COPYRIGHT: (C)1993,JPO&Japio