Resin Structure with Liquid Layer for Viscous Content Discharge
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Solution Overview
Problem
Current plastic containers with liquid layers on their surfaces face limitations in achieving optimal sliding and non-adhesiveness properties, particularly for viscous substances, due to the instability and limited effectiveness of existing surface modifications.
Innovation Solution
A resin structure with a liquid layer having locally protruded portions, featuring fine protrusions of at least 0.7 μm height and 20-100 protrusions/mm² density, supported by a resin layer with dispersed fine particles, and a liquid diffusion prevention layer to maintain stability and enhance sliding properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a liquid layer is formed on the inner surface of a plastic container to improve sliding property, then the sliding property is improved, but the liquid layer becomes unstable and loses its effect over time
Solution Approach 1:
The liquid is incorporated into the resin composition before forming the container, so that the liquid is already present in the inner surface layer during the molding process. This preliminary incorporation ensures the liquid layer is formed simultaneously with the container structure, preventing subsequent instability or loss of the liquid layer.
Solution Approach 2:
The invention uses a composite material consisting of resin and liquid dispersed within it. This composite structure allows the liquid to be stably maintained within the resin matrix while still providing the desired sliding property on the inner surface of the container.
2Ease of operation
If fine oxide particles are deposited on the inner surface to create a water-repellent film, then non-adhesiveness to aqueous contents is enhanced, but water condenses in the dented portions of the rugged surface
Solution Approach 1:
The invention changes the surface parameters by incorporating liquid into the resin composition, which modifies the surface energy and wetting properties. This parameter change allows the surface to maintain non-adhesiveness while preventing water condensation in surface irregularities, unlike the rigid oxide particle coating.
3Ease of operation
If thermoplastic resin layers with specific chemical compositions and additives are used to improve sliding property, then some improvement is achieved, but limitation is imposed on the kinds of resins and additives that can be used
Solution Approach 1:
The invention changes from relying on specific chemical compositions to using a physical parameter approach - incorporating liquid into the resin composition. This allows the use of various thermoplastic resins (polyethylene, polypropylene, polyester, etc.) without being limited to specific resin types or additives, as the liquid component provides the sliding property regardless of the base resin chemistry.
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 resin structure significantly improves sliding and non-adhesiveness properties by reducing frictional forces and maintaining surface properties over extended periods, allowing for efficient discharge of viscous contents without adhering to the container walls.
Implementation Method 1
The resin structure significantly improves sliding and non-adhesiveness properties by reducing frictional forces
Implementation Method 2
the surface to which the content comes in contact is formed to be finely rugged so as to express water-repelling property (hydrophobic property)
Implementation Method 3
a liquid diffusion prevention layer which prevents migration or diffusion of the liquid
Data Source
AI summary
A resin structure comprising a resin formed body (1) and a liquid layer (3) formed on a surface of the resin formed body (1), the liquid layer (3) having liquid protrusions (3a) that are locally protruded on the surface thereof. The structure exhibits improved properties on the surface of the resin formed body (1), such as improved sliding property and non-adhesiveness to various substances maintaining stability as a result of forming the liquid layer (3).