Multilayered container
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsSenzo Shimizu, Mitsuyasu Nagano, Tsutomu Ishizeki, Yoshiaki Momose
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Abstract
A multilayered container comprising a wall portion consisting of thermoplastic gas barrier resin (resin B) layers and thermoplastic resin (resin A) layers, with the terminal portion of the mouth opening being of a thermoplastic resin (resin A), said wall portion being a multilayered structure formed by alternately laminating the resin A layers and the resin B layers in such a manner that there are at least two resin B layers, with the proviso that there is one more of the resin A layer than the number of the resin B layers, said structure having been biaxially oriented.
Claims1
A multilayered container wherein the terminal portion of the mouth opening is a single-layered structure of polyethylene terephthalate (resin A), and the wall portion is a five-layered structure composed of two layers of a m-xylylene group-containing polyamide resin (resin B) and three layers of resin A in which the middle layer and the innermost and outermost layers are formed of resin A and the two intermediate layers between the middle layer and the innermost and outermost layers are formed of resin B, said container being formed by biaxially stretching a parison obtained by sequentially injection-molding two resins A and B, the thickness of the wall portion ranging from 200 to 500 microns, and the ratios of the thicknesses of the innermost and outermost layers, middle layer and intermediate layers being in the ranges of 50-70:30-50:3-20.
Dependencies are inferred from the claim text.