LAMINATED RESIN MOLDED BODY HAVING WAVILY FOLDED SECTIONAL STRUCTURE AND MANUFACTURE THEREOF

摘要

PROBLEM TO BE SOLVED: To obtain a laminated resin film having small Young's modulus and large extension ratio by a method wherein this film is produced by pinching an intermediate laminated resin layer having a wavily folded sectional structure between skin resin layers. SOLUTION: By executing a heat shrinkage treatment by holding a laminated resin molded body having heat shrinkable skin resin layers I and II at the temperature higher than the softening temperature of the resins I and II, a laminated resin molded body 100A, to the intermediate laminated resin layer of which wavily folded sectional structure is given selectively, is produced. Thus, by applying an extension treatment to the laminated resin molded body, the skin resin layers I and II of which are made of an elastomer, to the direction parallel or normal to its axis so as to release stress, the laminated resin molded body 100A, to the intermediate laminated resin layer I of which a wavily folded sectional structure is given selectively. By producing the above-mentioned structure, a laminated resin film excellent in breaking strength can be obtained.