Shrink-Formed Medical Package With Blunt Corners
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Solution Overview
Problem
Conventional medical packages face challenges in maintaining structural integrity and sterility during storage and handling due to excess material at corners and creases, which can lead to tears, deformation, and contamination.
Innovation Solution
The method involves using a shrink-formable composition for the package precursor, where a heated medium is directed to selectively shrink specific regions, such as corners or areas with folds, to create blunt or rounded surfaces, reducing excess material and stress points, while maintaining a sterilization window for gas permeability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional packaging material is used without selective shrinking, then the package is simple to manufacture, but the package has poor structural integrity due to excess material at corners and creases causing tears and deformation
Solution Approach 1:
The patent applies selective heat shrinking to specific regions (corners and creases) of the package rather than the entire package. This local treatment modifies the material properties only where needed to eliminate excess material and prevent tears, while leaving other regions unchanged. The nozzle system targets specific zones with heated medium to create localized shrinkage that enhances structural integrity without requiring complete package restructuring.
Solution Approach 2:
The selective heat shrinking process is performed before final package assembly and sterilization. By pre-treating the package precursor to eliminate excess material at corners and creases, the package is prepared in advance to resist tears and deformation during subsequent handling, sterilization, and storage processes, preventing structural failures before they occur.
2Reliability
If excess material is left at corners and creases, then the package is easier to seal, but the package is prone to tears, deformation, and contamination
Solution Approach 1:
The patent selectively removes excess material only at critical locations (corners and creases) where tears and contamination risks are highest, while maintaining sufficient material at sealing regions to ensure easy and reliable seal formation. This localized approach preserves sealing ease while eliminating reliability risks at vulnerable points.
3Strength
If the package is fully shrunk uniformly, then the package has better structural integrity, but the package cannot accommodate sterilization windows and complex shapes
Solution Approach 1:
The patent applies heat shrinking selectively to specific regions (corners and creases) rather than uniformly to the entire package. This localized shrinkage eliminates excess material at vulnerable points to improve structural integrity, while leaving regions containing sterilization windows and complex shape features unchanged, thereby maintaining adaptability and versatility.
4Manufacturing precision
If non-selective heat treatment is applied, then the process is simpler to control, but the package experiences uniform shrinking that creates deformation and stress points
Solution Approach 1:
The patent uses a nozzle system that directs heated medium to specific regions (corners and creases) of the package precursor. This selective application of heat allows precise control over which areas shrink, preventing uniform deformation and stress points while maintaining relatively simple heating equipment compared to complex multi-zone heating systems.
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 approach enhances the package's integrity and sterility by reducing the risk of tears and contamination, allowing for more efficient sterilization and cost-effective packaging with improved storage density.
Implementation Method 1
directing a flow of heated medium from a nozzle toward at least one region of the package precursor to cause the at least one region to shrink faster than an adjacent region
Data Source
AI summary
An example technique of forming a package includes retaining a package precursor in a support. The package precursor includes a shrink-formable composition and defines an interior volume configured to enclose a component, such as a medical supply. The package may be formed by at least directing a flow of heated medium from a nozzle toward at least one region of the package precursor to cause the at least one region to shrink faster than an adjacent region of the package precursor. In some examples, an example system for shrink-forming a package includes the support and the nozzle.