MULTILAYERED SHRINK FILM

PROBLEM TO BE SOLVED: To provide a multilayered shrink film in which a degree of shrinkage at normal temperature is controlled, and a degree of heat shrinkage (shrink ratio) is enhanced, and further feeling is good. SOLUTION: The film includes at least each one layer of a saponified ethylene-vinylester-based copolymer (A) layer having a structural unit expressed by general formula (1), and polyamide-based resin (B) layer containing a structural unit in which carbon numbers between amide bonds are 10-20. In a structural unit expressed by the general formula (1), R1-R6are each hydrogen atom or monovalent organic group, and may be same or different with each other. Especially, all of R1-R6are preferably hydrogen atoms from a point of copolymerization reactivity and industrial handleability of monomers in a production stage. However, at least a part of R1-R6may be organic groups, within the limits where a resin characteristic is not considerably damaged. As the organic group, a C1-4 alkyl group, e.g., methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, is preferable. X is preferably a single bond from a point of heat stability during production, a point of structural stability under a high temperature-acidity condition, a point of not excessively reducing crystallinity of EVOH, or the like. Wherein, that X is a single bond means that X per se is a bond. COPYRIGHT: (C)2010,JPO&INPIT