Pressure Relief Protrusion for Microwave Food Container
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Microwaveable meal boxes often experience pressure buildup during heating, leading to potential food splashing and safety hazards if the sealing film is not intentionally opened or cut, causing food to burst and create cleaning and safety issues.
Innovation Solution
A container design with a pressure relief structure, featuring a pressure relief protrusion and a pseudo-adhesive region formed between the protrusion and the sealing film, allowing steam to escape without fully opening the container, and an alternative design with a convex strip and groove to reduce adhesion and facilitate steam release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing film is used to isolate the food inside from the ambient environment, then the food preservation is improved, but the pressure buildup during heating causes food to burst and splash
Solution Approach 1:
The patent incorporates a pre-designed pressure relief protrusion structure on the peripheral plane of the container. This structure creates a predetermined weak point in the sealing film attachment before heating occurs. When pressure builds up during microwave heating, the sealing film naturally detaches at this pre-prepared location, allowing steam to escape without requiring any user action to puncture or open the seal, thus preventing food bursting while maintaining preservation during storage
Solution Approach 2:
The pressure relief protrusion acts as an intermediary element between the sealed container and the external environment. It provides a controlled interface where the sealing film can selectively detach under pressure conditions. This intermediary structure mediates the conflict between maintaining a tight seal for preservation and allowing pressure release during heating, enabling the sealing film to transition from a fully sealed state to a pressure-relief state automatically
2Reliability
If the sealing film is completely sealed to prevent contamination, then the food safety is improved, but the steam cannot escape during heating causing potential bursting
Solution Approach 1:
The container is manufactured with a pressure relief protrusion that creates a predetermined detachment point on the peripheral plane. This preliminary structural feature ensures that when the container is subjected to microwave heating, the sealing film will naturally detach at this specific location due to the concentrated stress, providing a controlled pressure relief path that prevents uncontrolled bursting and food loss
Solution Approach 2:
The patent converts the potentially harmful effect of pressure buildup during heating into a beneficial controlled release mechanism. The pressure relief protrusion is designed to create a localized weak point that intentionally allows the sealing film to detach under pressure, transforming the harmful pressure accumulation into a controlled steam escape path that prevents food bursting and maintains food safety
3Ease of manufacture
If the sealing film is attached flat to the peripheral plane for easy manufacturing, then the manufacturing simplicity is improved, but the adhesion is too strong preventing steam escape
Solution Approach 1:
The patent introduces a pressure relief protrusion with a curved surface on the peripheral plane of the container. This curvature creates a geometric discontinuity that prevents the sealing film from maintaining uniform contact. The curved surface reduces the effective adhesion area and creates a natural detachment point, allowing steam to escape during heating while still maintaining sufficient seal integrity during storage and handling
4Reliability
If no pressure relief structure is provided to maintain seal integrity, then the sealing reliability is improved, but excessive pressure causes food to burst and splash during heating
Solution Approach 1:
The container incorporates a pre-designed pressure relief protrusion structure during manufacturing. This preliminary feature creates a predetermined weak point in the sealing film attachment before the container is sealed or used. When pressure builds up during microwave heating, the sealing film naturally detaches at this pre-prepared location, providing a controlled pressure relief path that prevents food bursting and splashing while maintaining seal integrity during storage
Solution Approach 2:
The pressure relief protrusion serves as an intermediary structure between the sealed container interior and the external environment. It provides a controlled interface where the sealing film can selectively detach under pressure conditions. This intermediary element maintains seal integrity during normal handling and storage while enabling controlled pressure release during heating, preventing harmful food bursting and splashing
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 container effectively manages pressure buildup by allowing steam to escape through the pseudo-adhesive region or convex strip and groove configurations, preventing food from bursting and ensuring safe and clean heating.
Implementation Method 1
the attachment between the sealing film and the curved surface is relatively poorer. Thus, when the sealing film is attached to the container, a pseudo-adhesive region (a region with relatively weak adhesion of the sealing film) will be formed on and/or around the pressure relief protrusion
Data Source
AI summary
A container for food to be heated includes a bottom surface, a sidewall, a peripheral portion, and a pressure relief protrusion. The peripheral portion includes a peripheral plane, an inner edge, an outer edge, and a pressure relief region. The pressure relief region is on the peripheral plane. The pressure relief protrusion is in the pressure relief region, and the pressure relief protrusion contacts the inner edge. The pressure relief protrusion includes a pressure relief curved surface, and the pressure relief curved surface is connected to the peripheral plane. When the peripheral plane contacts a sealing film, the pressure relief curved surface also contacts the sealing film and forms a gap between the sealing film and the junction between the pressure relief curved surface and the peripheral plane. A box having the container is also provided.