US 2010/0140280 A1 · Bottle made from bioresin

Abstract

A method of making a bottle whereby a polylactic acid preform is stretch blow molded into a biodegradable bioresin bottle. An injection molded polylactic acid or polylactide preform having a finish, a transition portion, a body portion, and a closed end cap portion for making a blow molded biodegradable bioresin bottle having a substantially circular cross-section and a substantially elliptical cross-section. A biodegradable bioresin bottle having both substantially circular and substantially elliptical cross-sectional shapes. Hoop stiffness and bottle geometry are utilized to control the bottle shape resulting from deformation caused by vacuum creation as water vapor permeates outwardly through the bottle walls.

Claims21

Dependent claims

A bottle made from bioresin comprising:

a neck having a finish with an opening therein;
a shoulder adjacent said neck;
a base capable of supporting the bottle upright;
and
a main body between said shoulder and said base, said main body having a first portion that is substantially circular in cross section, the substantially circular cross section having a diameter, and a second portion that is substantially elliptical in cross section at a predetermined location, the substantially elliptical cross section of the second portion having a major axis and a minor axis, and the hoop stiffness of the first portion being greater than the hoop stiffness of the second portion such that when a vacuum is created inside the bottle the second portion deforms inwardly to decrease the length of the minor axis and outwardly to increase the length of the major axis.

2 more elements

Dependencies are inferred from the claim text.

Bottle made from bioresin

Life of this patent

Bottle made from bioresin

Life of this patent

Abstract

Claims21