Sterilization Bag Venting Structure for Microwave Pressure Relief
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Solution Overview
Problem
Conventional sealed bags fail to withstand internal pressure during microwave heating due to insufficient sealing integrity, leading to potential bursting and liquid leakage, necessitating manual openings which are inconvenient and incomplete in preventing leakage.
Innovation Solution
A high-temperature sterilization bag with a venting function, featuring a U-shaped or heat-resistant material with a venting portion and a filling port, allowing steam discharge without manual openings, and optionally a perforation for easy tearing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealed bag is used during microwave heating, then the packaging integrity is maintained, but the internal pressure causes the bag to burst
Solution Approach 1:
The bag is segmented into a sealed containing space and a venting portion, where the venting portion provides a controlled opening for pressure relief while the main containing space remains sealed for packaging integrity
Solution Approach 2:
The venting portion acts as an intermediary element that allows steam to escape from the sealed containing space, preventing pressure buildup that would otherwise cause the bag to burst while maintaining the sealed nature of the main packaging
2Strength
If a manual opening is made in the sealed bag before heating, then the pressure buildup is prevented, but liquid leakage occurs during heating
Solution Approach 1:
The venting portion serves as a controlled intermediary passage that allows steam to escape while the hydrophobic coating prevents liquid from leaking through the same opening
Solution Approach 2:
The venting portion utilizes a hydrophobic porous coating that allows vapor passage while blocking liquid, enabling pressure relief without liquid leakage
3Reliability
If no venting structure is provided, then the sealing is complete, but the bag cannot withstand internal pressure during heating
Solution Approach 1:
The bag structure is segmented into a sealed containing space and a venting portion, allowing the majority of the bag to remain sealed while a small portion provides pressure relief functionality
Solution Approach 2:
The venting portion is extracted from the main sealed structure, providing a dedicated pressure relief pathway that is separated from the primary containment function
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
Prevents bag explosion and ensures complete steam discharge, maintaining structural integrity and safety during microwave heating without manual venting, while facilitating easy filling and content retrieval.
Implementation Method 1
The main body is formed of a high-temperature resistant material
Implementation Method 2
steam thereby generated is able to be smoothly discharged from the venting portion
Data Source
AI summary
A high-temperature sterilization bag with venting function includes a main body formed of heat-resistant material and having a containing space, with a filling port disposed on one end for filling object therethrough, and at least a U-shaped venting portion disposed on a lateral side of the main body. The venting portion has at least three fifths of its volume arranged in the containing space. During heating process, steam is discharged through the venting portion without the need of tearing an opening on the high-temperature sterilization bag, thereby preventing burst due to excessive internal pressure.