Multi-layer bottle

A multi-layer bottle design with an independent inner layer accommodates thermal contraction in plastic bottles, maintaining the outer shape and enhancing usability and aesthetics by managing volume changes without additional material or deformable structures.

CA3107114CActive Publication Date: 2026-07-07PEPSICO INC
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Patent Information

Authority / Receiving Office
CA · CA
Patent Type
Patents
Current Assignee / Owner
PEPSICO INC
Filing Date
2019-07-29
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing plastic beverage bottles designed for hot-fill processes deform or require additional material to accommodate thermal contraction, leading to negative pressure and irregular surfaces that affect usability and aesthetics.

Method used

A multi-layer bottle construction where an inner layer moves independently from an outer layer to accommodate volume changes during thermal contraction, maintaining the outer shape and allowing for thin walls without ribs or panels, using techniques like controlled delamination and gas introduction to manage the space between layers.

Benefits of technology

The solution maintains the bottle's exterior shape and improves squeezability and aesthetics while reducing material usage and avoiding negative pressure, providing insulation and a smoother user experience.

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Abstract

A multi-layer beverage container made is disclosed. An outer layer encloses an inner layer that is configured to shrink or flex to accommodate volume changes of a beverage inside the beverage container caused by a change in temperature of the beverage in the sealed beverage container. The inner layer is not attached to the outer layer through the majority of the beverage container, with attachment zones being located at selected areas of the outer layer. There is a space between the inner layer and the outer layer. A gas introduction system is provided in the space to maintain a desired gas pressure in the space. The set gas pressure allows outer layer to be designed without the need to resist deformation caused by reduced pressure due to changing volumes of the beverage.
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