Multilayered Structure Liquid Diffusion Prevention Layer
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Solution Overview
Problem
Existing multilayered structures with a liquid layer on the surface experience a decline in slipping properties over time due to liquid diffusion, leading to a loss of surface properties.
Innovation Solution
A multilayered structure is designed with a liquid diffusion prevention layer on the underlying layer to suppress liquid diffusion, maintaining a covering ratio of not more than 40% over extended periods, using a resin with a density of at least 1.00 g/cm3 and a glass transition temperature of 35°C or higher, or a metal foil, glass, or ceramics, and an underlying layer with a density of not more than 1.0 g/cm3, along with a liquid diffusion adjusting layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a liquid layer is formed on the surface of a plastic container to improve slipping properties, then the contents can be discharged quickly without adhering to the inner wall surface, but the slipping properties and surface characteristics are lost after several days due to liquid diffusion
Solution Approach 1:
The container is divided into multiple functional layers: an inner layer that provides slipping properties, an intermediate layer that controls liquid diffusion, and an outer layer for structural integrity. This segmentation allows each layer to perform its specific function independently, solving the contradiction between providing slipping properties and maintaining them over time.
Solution Approach 2:
An intermediate layer is introduced between the inner liquid-containing layer and the outer structural layer. This intermediate layer acts as a mediator that controls the diffusion of liquid from the inner layer, preventing excessive diffusion while maintaining the slipping properties. The intermediate layer thus resolves the contradiction by mediating the interaction between the liquid and the container structure.
2Stability of the object's composition
If the inner layer is made permeable to allow liquid distribution, then the liquid layer can be maintained, but excessive diffusion causes loss of surface properties over time
Solution Approach 1:
Different regions of the container wall are given different permeability characteristics. The inner layer has controlled permeability to maintain liquid distribution, while the intermediate layer has restricted permeability to prevent excessive diffusion. This local differentiation of properties allows the system to maintain both liquid layer stability and slipping properties.
Solution Approach 2:
The permeability parameter of the container layers is carefully controlled and adjusted. The intermediate layer is designed with specific permeability characteristics that allow it to restrict liquid diffusion while still permitting sufficient liquid distribution in the inner layer. By changing and optimizing the permeability parameter, both liquid layer stability and slipping properties are maintained.
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 structure effectively maintains surface properties for extended periods, preventing liquid diffusion and ensuring stability of the liquid layer, which enhances the slipping properties and prevents adhesion of substances, maintaining effectiveness for the shelf life of products.
Implementation Method 1
a liquid diffusion prevention layer is provided on a lower side of the underlying layer to suppress or block a diffusion of a liquid that forms the liquid layer
Data Source
AI summary
A multilayered structure having a liquid layer (5) on a surface of a plastic underlying layer (3), wherein a liquid diffusion prevention layer (1) is provided on the lower side of the underlying layer (3) to suppress or block a diffusion of a liquid that forms the liquid layer (5), and a covering ratio F of the liquid layer (5) is maintained to be not less than 0.5. With this structure, the surface properties of the liquid layer (5) can be stably maintained over long periods of time.