Multilayered plastic container having excellent drop impact resistance

Abstract

A multilayered plastic container comprising, in at least a side wall portion of the container, an inner layer and an outer layer of a polyester resin, and an intermediate barrier layer of a barrier resin, wherein the lower end of the intermediate barrier layer in the radial direction of the container is positioned on the grounding portion of the container bottom portion or outside of the grounding portion of the container bottom portion in the radial direction of the container, featuring very excellent barrier property and drop impact resistance despite of its decreased thickness and weight.

1 . A multilayered plastic container comprising, in at least a side wall portion of the container, an inner layer and an outer layer of a polyester resin, and an intermediate barrier layer of a barrier resin, wherein the lower end of said intermediate barrier layer in the radial direction of the container is positioned on the grounding portion of the container bottom portion or outside of the grounding portion of the container bottom portion in the radial direction of the container. 
     
     
         2 . The multilayered plastic container according to  claim 1 , wherein the container is a pressure-resistant container for containing a content that has a spontaneous pressure. 
     
     
         3 . The multilayered plastic container according to  claim 1 , wherein said container bottom portion includes feet having grounding portions and valleys that are alternately formed. 
     
     
         4 . The multilayered plastic container according to  claim 3 , wherein the lower end of said intermediate barrier layer in the axial direction of the container is positioned at a central portion between said grounding portion and the uppermost end of the valley or higher than the central portion. 
     
     
         5 . The multilayered plastic container according to  claim 1 , wherein the inner layer and the outer layer are formed of a polyethylene terephthalate, and the intermediate barrier layer is formed of a mixture of the polyethylene terephthalate and the barrier resin. 
     
     
         6 . The multilayered plastic container according to  claim 5 , wherein said barrier resin contains a clay.