Patent ID: 8097315
Filing Date: 2012-01-17
Classification: B29B,B29C,B29K,B32B,B65D,C08L,Y10T

Abstract:
1. A multilayer container comprising an outermost layer, an innermost layer and at least one intermediate layer interposed between the outermost layer and the innermost layer, wherein the outermost layer and the innermost layer are each mainly made of a thermoplastic polyester resin A produced by polymerizing a dicarboxylic acid component comprising 80 mol % or higher of terephthalic acid with a diol component comprising 80 mol % or higher of ethylene glycol; at least one of the at least one intermediate layer is mainly made of a mixed resin B of a polyamide resin C and a polyamide resin D, said polyamide resin C and said polyamide resin D being in the mixed resin B in amounts in a range of 99.5 to 80 parts by weight of polyamide resin C and in a range of 0.5 to 20 parts by weight of polyamide resin D, for every 100 parts by weight of a total of polyamide resin C and polyamide resin D in the mixed resin B; the mixed resin B further containing cobalt in an amount of 0.01 to 0.1% by weight based on a total weight of the polyamide resin C and the polyamide resin D; the polyamide resin C being produced by polymerizing a diamine component comprising 70 mol % or higher of m-xylylenediamine with a dicarboxylic acid component comprising 70 mol % or higher of adipic acid; the polyamide resin D having a solubility index satisfying the formula (1): wherein Sa is a solubility index of the thermoplastic polyester resin A; Sc is a solubility index of the polyamide resin C, and Sd is a solubility index of the polyamide resin D, each solubility index being calculated by Small method; and the polyamide resin D having a glass transition temperature of 130° C. or lower which is higher than that of the polyamide resin C.