Paper and Foil Combination Bag Venting for Heat and Texture Control
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Solution Overview
Problem
Existing food packaging solutions fail to maintain the temperature and quality of heated food over extended periods, leading to drying out, texture degradation, and potential food waste due to inadequate heat and moisture management.
Innovation Solution
A food package with strategically positioned perforations that allow controlled heat and moisture release, maintaining food temperature and texture by preventing excessive steam buildup while minimizing weight loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the food package is completely sealed to maintain temperature, then heat retention is improved, but moisture buildup causes texture degradation and drying out
Solution Approach 1:
The package incorporates a perforated lid with multiple small holes that allow controlled moisture vapor transmission while maintaining thermal retention. The porous structure enables selective passage of water vapor molecules while blocking larger food particles and liquid fats, resolving the contradiction between heat retention and moisture management.
Solution Approach 2:
The lid features non-uniform perforation distribution with different hole densities in different regions. The perforations are strategically positioned to allow moisture escape from steam-prone areas while maintaining structural integrity and heat retention in other zones, addressing the local moisture buildup problem without compromising overall temperature maintenance.
2Stability of the object's composition
If perforations are added to allow moisture escape, then food texture is maintained, but heat loss increases and temperature drops
Solution Approach 1:
The perforated lid acts as a selective barrier that allows small water vapor molecules to pass through while blocking larger heat conduction pathways. The controlled porosity enables moisture transmission with minimal thermal impact, maintaining both texture quality and temperature.
Solution Approach 2:
The lid design optimizes perforation parameters including hole diameter (0.5-2mm), hole density (10-50 holes per 100cm²), and hole distribution pattern to achieve the optimal balance between moisture vapor transmission rate and thermal insulation performance.
3Stability of the object's composition
If larger perforations are used to improve moisture release, then texture maintenance is enhanced, but leakage of fat and melted foodstuff increases
Solution Approach 1:
The lid employs a fine perforation structure with small hole diameters (0.5-2mm) that create a physical barrier against liquid fats and melted foodstuff while allowing water vapor molecules to pass through. The pore size is carefully selected to be larger than vapor molecules but smaller than liquid droplets, preventing substance loss.
Solution Approach 2:
The non-uniform perforation distribution places smaller holes in regions prone to liquid accumulation while maintaining adequate ventilation in steam-prone areas, selectively managing different types of moisture release needs.
4Stability of the object's composition
If multiple perforations are added to enhance ventilation, then moisture management is improved, but structural integrity of the lid weakens
Solution Approach 1:
The lid design concentrates perforations in specific regions away from high-stress areas such as the lid rim and folding sections. The perforation-free zones maintain structural strength while perforated zones provide ventilation, locally optimizing both strength and moisture release functions.
Solution Approach 2:
The lid structure is divided into perforated and non-perforated zones, with the perforated portion occupying only 10-30% of the total lid area. This segmentation maintains overall structural integrity while providing sufficient ventilation through the distributed perforations.
Data Source
AI summary
A food package may include a plurality of perforations. The plurality of perforations can be sized, shaped, and/or positioned on the food package so the food package is configured to maintain a temperature of foodstuff in the food package above a predetermined temperature for a predetermined period of time. The plurality of perforations can be sized and/or shaped so the foodstuff loses less than a predetermined weight after the predetermined period of time.