Fermented Food Packing Sheet Gas Discharge Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing packaging solutions for fermented foods, such as Kimchi, fail to effectively discharge carbon dioxide gas generated during fermentation, leading to container deformation and do not adequately prevent liquid leakage during transportation.
Innovation Solution
A packing sheet with a layered structure comprising a non-gas-permeable base material with fine bores and a gas-permeable waterproof material, where the layers are partially laminated to create a gap for gas flow while preventing liquid leakage, integrated with a food container featuring a discharge hole and flow grooves for efficient gas release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a non-woven fabric is fused into a foam packing sheet to ensure leakproof sealability, then liquid leakage is prevented, but carbon dioxide gas generated during fermentation cannot be discharged, causing container deformation
Solution Approach 1:
The packing sheet is divided into multiple functional layers: a first layer with gas discharge function (foam material with closed cells) and a second layer with liquid proofing function (non-woven fabric). This segmentation allows each layer to perform its specific function independently, enabling gas to pass through the foam layer while the non-woven fabric layer prevents liquid leakage.
Solution Approach 2:
The invention uses a composite structure combining foam material and non-woven fabric in a laminated configuration. The foam material provides gas permeability through its closed-cell structure, while the non-woven fabric provides liquid barrier properties. This composite material approach resolves the contradiction by integrating materials with complementary properties.
2Object-generated harmful factors
If a gas absorbent is attached to absorb carbon dioxide, then carbon dioxide is removed, but nitrogen or oxygen gas remains in the container, and the gas absorbent cannot function if immersed in Kimchi juice
Solution Approach 1:
Instead of attempting to absorb all gases (including those that cannot be absorbed when immersed in liquid), the invention converts the harmful effect of gas accumulation into a beneficial discharge mechanism. The foam material's closed-cell structure naturally allows gas to escape while maintaining liquid barrier properties, turning the potential problem of gas buildup into an automatic gas venting function.
3Reliability
If the container is sealed tightly to prevent liquid leakage, then liquid leakage is prevented, but gas generated during fermentation causes container expansion and deformation
Solution Approach 1:
The packing sheet applies local quality differentiation by using a foam material with closed-cell structure in specific regions where gas discharge is needed, while maintaining liquid proofing properties in other areas. The laminated structure creates zones with different permeability characteristics, allowing gas to pass through designated pathways while blocking liquid leakage at critical points.
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 solution prevents container expansion and deformation by efficiently discharging gases while maintaining leakproof sealability and preventing liquid leakage during transportation.
Implementation Method 1
a first layer and a second layer, which are configured such that gas flows between one surface and the other surface, are stacked, the packing sheet including: a lamination portion which is formed by partially laminating the first layer and the second layer; and a gap portion which is a region other than a region of the lamination portion and has a space formed between the first layer and the second layer so that the gas flows in the space
Implementation Method 2
a non-gas-permeable base material having a fine bore
Implementation Method 3
a gas-permeable base material... the gas-permeable base material of the second layer may have a waterproof property
Data Source
AI summary
A packing sheet for discharging gas according to an exemplary embodiment of the present invention has a structure in which a first layer and a second layer, which are configured such that gas flows between one surface and the other surface, are stacked, and includes: a lamination portion which is formed by partially laminating the first layer and the second layer; and a gap portion which is a region other than a region of the lamination portion and has a space formed between the first layer and the second layer so that the gas flows in the space. According to the packing sheet for discharging gas, a space, in which gas may flow, is formed by partially laminating the first layer having fine bores and the second layer made of a gas-permeable waterproof material, and as a result, it is possible to prevent a liquid leakage while smoothly discharging the gas created in the container.