Packaging Bag Partitioning for Infectious Substance Hermeticity
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Solution Overview
Problem
Secondary packaging plastic bags for infectious substances fail to maintain hermeticity at elevated internal pressures due to temperature variations, leading to unreliable containment and handling challenges.
Innovation Solution
A packaging bag design featuring partitioning materials on the inner surfaces of the front and back surfaces, forming pocket portions that maintain contact and distribute increased internal pressure, preventing the opening of the loading-and-unloading port, and using a three-layer structure with a nylon core and polyethylene layers for enhanced sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a plastic bag is used for secondary packaging of infectious substances, then ease of operation and handling is improved, but reliability of containment deteriorates when internal pressure reaches 95 kPa or higher
Solution Approach 1:
The plastic bag is divided into multiple sealed compartments by partition walls, creating separate packaging spaces. This segmentation allows the bag to maintain hermeticity in each compartment even when internal pressure reaches 95 kPa or higher, while still providing ease of operation for handling and loading/unloading through the opening on one side.
2Reliability
If the plastic bag is made entirely hermetic with no opening, then reliability of containment is improved, but ease of operation for loading and unloading deteriorates
Solution Approach 1:
The bag structure is segmented with a dedicated opening on one side that allows access for loading and unloading operations. The partition walls create sealed compartments that maintain hermeticity, while the opening provides ease of operation without compromising the overall containment reliability when properly closed.
3Reliability
If partitioning materials are added to distribute internal pressure, then reliability of containment is improved, but device complexity increases
Solution Approach 1:
Partition walls are incorporated into the plastic bag structure to divide it into multiple sealed compartments. These partitions distribute internal pressure across multiple surfaces, maintaining hermeticity at pressures up to 95 kPa. The partitioning is integrated into the bag design rather than adding separate components, thereby limiting the increase in device complexity.
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
Ensures safe transportation of infectious substances by maintaining hermeticity even at pressures up to 95 kPa and facilitates easy handling and loading/unloading due to an enlarged opening on one side, enhancing the reliability and workability of the packaging.
Implementation Method 1
partitioning materials having a required size and formed of a plastic sheet or film being disposed respectively on inner surfaces of the front surface material and the back surface material on the side of upper ends thereof, the partitioning materials being attached respectively to the front surface material and the back surface material by heat-sealing the upper end edge portion and the both side edge portions to form pocket portions; a sealing material to be attached with an adhesive device to the back surface material on the outside of an upper end portion thereof so as to prevent the opening from opening, wherein a surface contact between the partitioning materials is maintained when an internal pressure in the packaging bag is increased, and the corresponding internal pressure is received by any one of the pocket portions
Implementation Method 2
the partitioning materials being attached respectively to the front surface material and the back surface material by heat-sealing the upper end edge portion and the both side edge portions
Implementation Method 3
a sealing material to be attached with an adhesive device to the back surface material on the outside of an upper end portion thereof so as to prevent the opening from opening
Data Source
AI summary
A packaging bag for secondary packaging which allows safety transport of infectious substances is provided. Front and back surface materials are placed on top of another and formed into a bag member by heat-sealing both side edge and bottom edge portions continuously. Partitioning materials formed of a plastic sheet or film having a required size are disposed on inner surfaces of the upper ends of the front and back surface materials and attached to the front and back surface materials by heat-sealing both side edge and bottom edge portions except for an upper end edge portion to form pocket portions. A sealing material is stuck to the back surface material on the outside of the upper end portion thereof so as not to be opened. The internal pressure is received by one of the pocket portions when the internal pressure in the packaging bag is increased.