Cyclodextrin Packaging Coating for Ethylene Inhibition
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Solution Overview
Problem
Current methods for extending the shelf life of produce by inhibiting ethylene production are inefficient, leading to significant food waste and resource loss due to variations in ethylene concentration within storage environments, and existing ethylene inhibitors have limitations in maintaining continuous effectiveness.
Innovation Solution
A cyclodextrin composition is used as a coating on packaging materials, which, when exposed to electromagnetic radiation, forms a polymeric layer that releases a controlled amount of an olefinic inhibitor, such as 1-methylcyclopropene, to maintain consistent ethylene inhibition and extend the shelf life of produce.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If point source release of 1-MCP is used, then initial ethylene inhibition is achieved, but concentration gradient causes non-uniform inhibition and reduced shelf life
Solution Approach 1:
The patent divides the single point source into multiple distributed release points across the packaging surface. Multiple sachets or coating zones release 1-MCP simultaneously from different locations, creating overlapping concentration fields that uniformize the ethylene inhibition across the entire produce surface, eliminating the gradient effect of single-point release.
Solution Approach 2:
The patent transitions from zero-dimensional point source release to two-dimensional surface distribution. By coating 1-MCP-containing composition across the packaging surface area rather than releasing from a single point, the system creates a planar distribution pattern that ensures all produce surfaces are equidistant from release points, achieving concentration uniformity.
2Duration of action of moving object
If continuous exposure to ethylene inhibitor is maintained, then shelf life is extended, but inhibitor diffuses from binding site reducing long-term effectiveness
Solution Approach 1:
The patent applies 1-MCP to the packaging surface in advance before produce is placed inside. The pre-applied composition serves as a reservoir that releases 1-MCP continuously over time, maintaining effective concentrations throughout the storage period without requiring repeated applications or continuous external supply.
Solution Approach 2:
The patent uses the packaging material itself as an intermediary carrier for 1-MCP. The composition is applied to and bonded with the packaging surface, which then acts as a controlled release reservoir. This intermediary system maintains continuous presence of 1-MCP at the produce-packaging interface, ensuring prolonged and consistent ethylene inhibition.
3Reliability
If multiple ethylene inhibitors are applied to ensure coverage, then inhibition effectiveness improves, but device complexity and application difficulty increase
Solution Approach 1:
The patent makes the packaging material multi-functional by integrating ethylene inhibition capability directly into the packaging structure. The packaging serves both its primary containment function and the secondary function of releasing 1-MCP, eliminating the need for separate inhibitor devices or multiple components while achieving comprehensive coverage.
Solution Approach 2:
The patent merges the ethylene inhibitor function with the packaging material itself. By coating 1-MCP-containing composition onto the packaging surface and bonding it through UV or e-beam irradiation, the inhibitor system becomes integrated with the packaging structure, simplifying the overall system while ensuring uniform and continuous ethylene inhibition.
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 solution provides a consistent and prolonged inhibition of ethylene action, reducing food waste and extending the shelf life of produce by maintaining a uniform ethylene concentration within storage environments, thereby improving the efficiency of resource use and reducing postharvest losses.
Implementation Method 1
the composition becomes bonded to the packaging material, or polymerizes to form a polymeric layer or coating on the surface of the packaging material
Implementation Method 2
They often diffuse from the binding site over a period of several hours leading to a longer term reduction in inhibition
Data Source
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AI summary
Cyclodextrin compositions including one or more radiation polymerizable monomers and a cyclodextrin inclusion complex, the cyclodextrin inclusion complex including a cyclodextrin compound and an olefinic inhibitor of an ethylene generation in produce, are coated onto packaging materials and cured. Treated containers and treated package inserts having the cured cyclodextrin compositions are useful in packaging of respiring plant materials.