Expandable Insulating Packaging With Air-Gap Thermal Barrier
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Solution Overview
Problem
Conventional thermally insulated containers fail to effectively maintain temperature and provide adequate insulation for hot or cold contents, often leading to heat transfer and discomfort during handling.
Innovation Solution
A thermally activatable insulating packaging system that incorporates a die cut blank coated with a thermally expandable material, which expands in response to temperature changes to create an air gap and enhance insulation, while also providing rigidity and reducing material thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional thermally insulated containers are used, then basic insulation is provided, but heat transfer occurs and handling comfort is insufficient
Solution Approach 1:
The packaging system transitions from a static insulation structure to a dynamic one where the expandable material changes state in response to temperature stimuli. The material remains compact during storage and shipping, then expands automatically when exposed to hot or cold contents, creating an adaptive insulation barrier that adjusts to the thermal conditions of the product being packaged.
Solution Approach 2:
The invention utilizes a material that undergoes parameter changes in response to temperature variations. The expandable material changes its physical state (from compressed to expanded) based on thermal parameters, transforming from a low-volume state during shipping to a high-volume insulating state during product storage and handling, thereby resolving the contradiction between compact storage and effective insulation.
2Loss of energy
If thicker insulating material is used to improve insulation, then temperature maintenance improves, but material usage and storage efficiency deteriorate
Solution Approach 1:
The packaging system employs a nested structure where the expandable insulation material is contained within the packaging container in a compressed state. When activated by temperature exposure, the material expands outward to form the insulation layer, effectively creating an insulating barrier without requiring permanent allocation of space for thick insulation material during shipping and storage.
Solution Approach 2:
The expandable material is pre-positioned within the packaging container in a compressed state, ready to expand when needed. This preliminary placement allows the system to provide thick insulation only when required (when contents are hot or cold), while maintaining a compact form factor during shipping and storage, thereby reducing overall material usage while preserving temperature maintenance capabilities.
3Loss of energy
If expandable material is added to enhance insulation, then thermal performance improves, but device complexity increases
Solution Approach 1:
The packaging system incorporates a self-activating mechanism where the expandable material automatically responds to temperature changes from the contents without requiring external control systems, sensors, or complex actuation mechanisms. The material self-regulates its expansion state based on the thermal conditions, simplifying the overall device architecture while maintaining superior thermal insulation performance.
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 system effectively maintains the temperature of contents by minimizing heat transfer, providing improved insulation and comfort during handling, while allowing for lighter material usage and efficient storage and assembly.
Implementation Method 1
The material may be adapted to be expanded to provide thermal insulation
Implementation Method 2
The system effectively maintains the temperature of contents by minimizing heat transfer
Data Source
AI summary
A method of making a container includes applying an insulating material in an inactive form to form a layer on a first substrate. The applied insulating material includes expandable microspheres. The method further includes joining a second substrate to the first substrate to adhere the first substrate to the second substrate and to create at least a portion of a multi-layer composite having at least one air gap between the first substrate and the second substrate. The method further includes heating the applied insulating material to activate expandable microspheres thereof to form expanded microspheres. The method further includes increasing the thickness of the applied insulating material layer to thereby increase the volume of the air gap between the first substrate and the second substrate of the multi-layer composite by the heating of the applied insulating material. The method further includes forming the multi-layer composite into a container having expanded microspheres.