Peelable Lid Frangible Seal for Airtight Container Freshness
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Solution Overview
Problem
Existing packaging technologies lack efficient methods for producing containers with easily peelable lids that maintain product freshness and integrity, particularly in beverage pods and similar containers.
Innovation Solution
A method for manufacturing a container with a peelable lid featuring a frangible seal, utilizing a container body with a polymer-lined rim, a cavity, and a lid sealed to the rim, accompanied by a pull tab for easy removal, employing heat and pressure sealing techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lid is sealed tightly to the container rim to maintain product freshness, then the seal integrity is improved, but the ease of peeling the lid deteriorates
Solution Approach 1:
The sealing system is divided into two distinct segments: a frangible seal layer that breaks easily for opening and a polymer lining that provides durable sealing. The frangible seal is positioned between the lid and the polymer lining, allowing it to fracture during peeling while the polymer lining maintains the seal integrity with the container rim.
Solution Approach 2:
Different regions of the sealing structure have different properties: the frangible seal has low strength to allow easy breaking, while the polymer lining has high adhesion strength to maintain seal integrity. The pull tab is positioned at a specific location to concentrate breaking force on the frangible seal region rather than the entire seal area.
2Ease of operation
If a frangible seal is added to enable easy peeling, then the ease of operation is improved, but the device complexity worsens
Solution Approach 1:
The frangible seal and polymer lining are combined into a single integrated sealing structure. The frangible seal is applied directly over the polymer lining on the container rim, creating a unified sealing system that provides both easy opening and durable sealing without requiring separate mechanisms.
Solution Approach 2:
The frangible seal is designed as a disposable, single-use component that is intentionally weak and meant to be broken during opening. This low-cost, short-living element enables easy opening while the more durable polymer lining maintains the seal integrity for the product's storage period.
3Reliability
If heat and pressure sealing techniques are used to create an airtight seal, then the seal integrity is improved, but the manufacturing complexity worsens
Solution Approach 1:
The sealing process replaces complex mechanical sealing systems with a simpler thermal process. Heat and pressure are applied to melt and bond the polymer lining to the container rim, creating an airtight seal through thermal fusion rather than mechanical fastening, which simplifies the overall manufacturing equipment required.
Solution Approach 2:
The sealing process utilizes the phase transition of the polymer material from solid to molten state during heating, then back to solid upon cooling. This phase change allows the polymer to flow and bond with the container rim under heat and pressure, creating a strong airtight seal that simplifies the manufacturing process compared to mechanical sealing methods.
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
The method enables the production of containers with airtight, easily peelable lids that preserve content freshness and facilitate user-friendly opening, suitable for various materials and shapes, including beverage pods and other containers.
Implementation Method 1
employing heat and pressure sealing techniques
Data Source
AI summary
A container body with a peelable lid having a frangible seal including a container body made of an opening having a rim with a polymer lining, a cavity, a body wall, and a closed end. The container body also includes a lid sealed to the rim of the open end of the container body; and a pull tab.