Passive CO2 Barrier Layer Placement in Carbonated Beverage Preforms
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current carbonated PET beverage containers face challenges in extending shelf-life while maintaining quality, with existing solutions involving costly new designs, manufacturing complexities, and recyclability issues, particularly with CO2 gas barriers like Nylon and novel polyesters.
Innovation Solution
A preform configuration for carbonated beverage containers with a passive CO2 barrier layer positioned closer to the inner surface than the outer surface within the PET wall, utilizing materials like Polyglycolic Acid (PGA), Polyethylene Furanoate (PEF), and MXD6, which can be blended with PET, to enhance gas retention and shelf-life without significant modifications to existing machinery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If higher weight or crystallinity is used to extend shelf-life, then gas barrier performance is improved, but manufacturing cost and device complexity increase
Solution Approach 1:
The patent applies composite materials by integrating a passive CO2 barrier layer (made from materials like PGA, PEF, PTF, PNF, PEN, or MXD6) within the PET container wall structure. This multi-layer composite approach provides superior gas barrier performance compared to single-material solutions, extending shelf-life without requiring increased overall container weight or crystallinity.
Solution Approach 2:
The barrier layer is positioned specifically at the inner portion of the container wall, closer to the product side, where CO2 barrier functionality is most needed. This localized quality approach concentrates the barrier function where it provides maximum benefit while maintaining overall container simplicity and ease of manufacturing.
2Reliability
If Nylon (MXD6) is used as a barrier layer, then CO2 gas barrier performance is improved, but bottle clarity deteriorates due to haze
Solution Approach 1:
The patent offers alternative barrier materials (PGA, PEF, PTF, PNF, PEN) with different optical and barrier parameters than traditional Nylon. These materials provide comparable or superior CO2 barrier performance while maintaining bottle clarity and avoiding the haze problem associated with Nylon, thus changing the material parameters to resolve the contradiction.
3Reliability
If novel polyester resins (PGA, PEF, PTF) are used for barrier layers, then gas barrier performance and sustainability are improved, but manufacturing cost increases during early development phase
Solution Approach 1:
The barrier layer constitutes a specific portion (5-40 wt.%) of the overall container wall structure, rather than requiring the entire container to be made from expensive novel materials. This localized application of high-performance materials provides the necessary gas barrier function while reducing overall material cost compared to full-container use of novel resins.
4Duration of action of stationary object
If passive barrier layers are applied to extend shelf-life, then duration of action is improved, but recyclability deteriorates
Solution Approach 1:
The patent uses composite materials consisting of PET base layer combined with thinner passive barrier layers (5-40 wt.% concentration). This composite structure provides extended shelf-life through the barrier function while maintaining the predominance of recyclable PET material, thereby preserving recyclability compared to containers made entirely from non-recyclable multi-layer structures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration improves shelf-life by 50-60% for small-sized containers by optimizing the position and concentration of the barrier layer, achieving a cost-performance balance and maintaining bottle clarity, while being recyclable and lightweight.
Implementation Method 1
A passive CO2 barrier layer is between the inner portion and the outer portion of the base layer. The passive CO2 barrier layer extends along the body portion to the bottom portion, and across the bottom portion.
Data Source
AI summary
A preform configured to form a carbonated beverage container. The preform includes a finish defining an opening. A body portion of the preform extends from the finish. A bottom portion of the preform is at an end of the preform opposite to the finish. A longitudinal axis of the preform extends through an axial center of the bottom portion. A base layer is included with the body portion and the bottom portion. The base layer has an inner portion with an inner surface at a carbonated product side of the preform. An outer portion of the base layer has an outer surface at an outer bottle side of the preform. A passive CO2 barrier layer is between the inner portion and the outer portion of the base layer. The passive CO2 barrier layer extends along the body portion to the bottom portion, and across the bottom portion. The passive CO2 barrier layer is arranged closer to the inner surface than the outer surface to increase the shelf-life of carbonated products.