Hot-fillable plastic container

Abstract

Plastic container comprises a container body having a bottom portion, a sidewall portion and an upper portion, with a chamber defined therein. The bottom portion includes a support surface and a variable dynamic base portion extending inward from the support surface configured to deflect in response to a pressure differential between the chamber and an exterior of the container body. The sidewall portion includes a lower circumferential groove ring and an upper circumferential groove ring, wherein the lower circumferential groove ring has a width W1 and depth D1 in side view, and an outer radius R1 in plan view, the ratio of the width W1 to the outer radius R1 ranges between 0.07 to 0.22, and the ratio of the depth D1 to the outer radius R1 ranges between 0.04 to 0.18. The upper circumferential groove ring has a width W2 and depth D2 in side view, and an outer radius R2 in plan view, the ratio of the width W2 to the outer radius R2 ranges between 0.07 to 0.22, and the ratio of the depth D2 to the outer radius R2 ranges between 0.04 to 0.18. The base portion comprises an inner support wall extending upwardly from the support surface, wherein an upper section of the inner support wall extends inwardly at an angle of between about 15 degrees to about 85 degrees relative to the reference plane.

What is claimed is: 
     
         1 . A hot fillable plastic container comprising:
 a container body blow molded from a preform comprising at least 25% PCR and having a bottom portion, a sidewall portion and an upper portion;   the bottom portion including a support surface and a variable dynamic base portion extending inward from the support surface configured to deflect in response to a pressure differential between the chamber and an exterior of the container body;   the container body having a chamber defined therein, the container body further comprising a finish portion extending from the upper portion and defining a mouth in fluid communication with the chamber;   the sidewall portion including a lower circumferential groove ring and an upper circumferential groove ring, wherein the lower circumferential groove ring has a width W 1  and depth D 1  in side view, and an outer radius R 1  in plan view, the ratio of the width W 1  to the outer radius R 1  ranges between 0.07 to 0.22, and the ratio of the depth D 1  to the outer radius R 1  ranges between 0.04 to 0.18;   wherein the upper circumferential groove ring has a width W 2  and depth D 2  in side view, and an outer radius R 2  in plan view, the ratio of the width W 2  to the outer radius R 2  ranges between 0.07 to 0.22, and the ratio of the depth D 2  to the outer radius R 2  ranges between 0.04 to 0.18; and;   the base comprising:
 a support surface defining a horizontal reference plane; 
 a sidewall having a plurality of horizontally displaced annular ribs; 
 an inner support wall extending upwardly from the support surface, 
   wherein an upper section of the inner support wall extends inwardly at an angle of between about 15 degrees to about 85 degrees relative to the reference plane;
 a first radiused portion extending radially inward toward the central longitudinal axis from the inner support wall and concave relative to the reference plane; 
 a second radiused portion extending radially inward toward the longitudinal axis from the first radiused portion and convex relative to the reference plane; 
 an intermediate surface extending radially inward toward the longitudinal axis from the second radiused portion, wherein the intermediate surface comprises an intermediate radiused portion concave relative to the reference plane; a third radiused portion extending radially inward toward the longitudinal axis from the intermediate surface and convex relative to the reference plane; and 
 a central portion disposed proximate the third radiused portion. 
   
     
     
         2 . A hot fillable plastic container comprising:
 a container body blow molded from a preform comprising at least 25% PCR and having a bottom portion, a sidewall portion and an upper portion;   the bottom portion including a support surface and a variable dynamic base portion extending inward from the support surface configured to deflect in response to a pressure differential between the chamber and an exterior of the container body;   the container body having a chamber defined therein, the container body further comprising a finish portion extending from the upper portion and defining a mouth in fluid communication with the chamber;   the sidewall portion including a plurality of circumferential groove rings, wherein at least one circumferential groove ring has a width W 3  and depth D 3  in side view, and an inside radius R 3  in plan view, the ratio of the width W 3  to the inside radius R 3  ranges between about 0.15 to about 0.46, and the ratio of the depth D 3  to the inside radius R 3  ranges between about 0.10 to about 0.3; and,   the base comprising:
 a support surface defining a horizontal reference plane; 
 a sidewall having a plurality of horizontally displaced annular ribs; 
 an inner support wall extending upwardly from the support surface, 
   wherein an upper section of the inner support wall extends inwardly at an angle of between about 15 degrees to about 85 degrees relative to the reference plane;
 a first radiused portion extending radially inward toward the central longitudinal axis from the inner support wall and concave relative to the reference plane; 
 a second radiused portion extending radially inward toward the longitudinal axis from the first radiused portion and convex relative to the reference plane; 
 an intermediate surface extending radially inward toward the longitudinal axis from the second radiused portion, wherein the intermediate surface comprises an intermediate radiused portion concave relative to the reference plane; 
 a third radiused portion extending radially inward toward the longitudinal axis from the intermediate surface and convex relative to the reference plane; and, 
 a central portion disposed proximate the third radiused portion.