Container Tightness Testing by Thermal Liquid Immersion
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Solution Overview
Problem
Existing methods for determining container tightness, such as dye solution and gas transfer tests, require vacuum chambers and often fail to provide reliable indications for extended storage periods, especially in pharmaceutical applications like mRNA vaccines.
Innovation Solution
A method involving exposing a container to an ambient liquid at a different temperature for a predetermined period, then assessing tightness based on the amount of liquid or initial content that crosses the container's boundaries, using microscopy and spectroscopy for detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vacuum chamber methods are used for tightness testing, then container integrity can be assessed, but device complexity and cost increase
Solution Approach 1:
The patent extracts the essential function of tightness testing from the complex vacuum chamber system. Instead of requiring a vacuum chamber, the method uses a simple liquid immersion setup where the container is placed in a liquid reservoir and observed for leakage. This extraction maintains the core assessment capability while eliminating the complex vacuum generation and maintenance systems.
Solution Approach 2:
The patent replaces the mechanical vacuum chamber system with a simpler liquid-based detection system. Instead of using mechanical vacuum pumps and pressure control systems, the method relies on liquid penetration through leaks under ambient pressure conditions, substituting complex mechanical systems with a more straightforward liquid immersion approach.
2Reliability
If conventional tightness tests are used, then testing can be performed, but reliability for extended storage scenarios is insufficient
Solution Approach 1:
The patent changes the testing parameters to match extended storage conditions. Instead of using standard vacuum chamber protocols, the method implements liquid immersion at ambient pressure, which better simulates real-world storage conditions. This parameter change enables the test to reliably indicate tightness for extended storage scenarios, including pharmaceutical applications like mRNA vaccines.
3Difficulty of detecting and measuring
If dye solution immersion is used, then leakage detection is possible, but vacuum chamber requirements increase device complexity
Solution Approach 1:
The patent extracts the leakage detection function from the vacuum chamber system. By using liquid immersion under ambient pressure, the method maintains the ability to detect leaks through dye solution penetration without requiring vacuum chamber infrastructure. The detection mechanism remains effective while the supporting equipment is dramatically simplified.
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
Provides a reliable and efficient way to determine container tightness without vacuum chambers, suitable for extended storage scenarios, ensuring container integrity and sterility.
Implementation Method 1
exposing the container to an ambient liquid during a first predetermined period of time, where during the first predetermined period of time the ambient liquid has a second temperature different from the first temperature
Data Source
AI summary
A method of determining a tightness of a container includes: providing a container having an initial content at a first temperature, the container including a container body and at least one closure device applied to the container body; exposing the container to an ambient liquid during a first predetermined period of time, where during the first predetermined period of time the ambient liquid has a second temperature different from the first temperature; and after the first predetermined period of time has lapsed, determining a tightness of the container based on an amount of the ambient liquid and/or an amount of the initial content of the container having passed across a boundary of the container.