Lubricated Rugged Container for Viscous Fluid Discharge
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Solution Overview
Problem
Existing container designs with rugged inner surfaces for improved slipping properties face challenges in maintaining uniform lubricating liquid layers, leading to variations in slipping performance and increased production costs due to complex post-processing requirements.
Innovation Solution
A container body with an inner surface featuring small ruggedness and an excessive amount of immiscible lubricating liquid, forming a liquid pool at the upper end face when upright, which enhances slipping properties without requiring complex post-processing, and allows for simple spraying of the lubricating liquid to ensure uniform coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a finely rugged surface is formed on the container inner surface to improve non-adhesiveness, then the slipping property to aqueous content is improved, but moisture condensation occurs at dents causing deterioration in slipping property over time
Solution Approach 1:
A lubricating liquid layer is introduced as an intermediary substance between the finely rugged surface and the content. This liquid layer fills the dents and protrusions on the rugged surface, preventing moisture condensation from directly contacting and filling the surface features. The lubricating liquid maintains stable slipping properties by creating a consistent interface that does not deteriorate over time, thus resolving the contradiction between initial slipping improvement and long-term durability.
2Reliability
If ruggedness with small pitch and large height is formed to hold liquid by capillary phenomenon, then slipping property is improved, but the formation process becomes extremely complicated and production cost increases
Solution Approach 1:
The invention extracts the liquid holding function from the complex capillary ruggedness structure and transfers it to a simpler lubricating liquid layer applied on a relatively simple rugged surface. Instead of requiring extremely fine pitch and large height features to hold liquid through capillary action, the patent uses a lubricating liquid that naturally forms a stable layer on the rugged surface, thereby achieving the same slipping improvement effect with much simpler manufacturing processes.
Solution Approach 2:
The invention changes the approach from creating extreme geometric parameters (very small pitch, very large height) to using moderate ruggedness parameters combined with a lubricating liquid. By changing the state from relying on extreme capillary geometry to using a liquid-coated surface, the patent achieves comparable or superior slipping properties with dramatically reduced process complexity.
3Reliability
If a thin liquid layer is formed to wet the inner surface, then slipping property is improved, but the liquid layer thickness becomes non-uniform and slipping performance varies
Solution Approach 1:
The invention applies an excessive amount of lubricating liquid to the rugged surface, allowing the liquid to flow down and form a liquid pool at the periphery of the upper end face. This excessive application ensures that the ruggedness is completely coated and that sufficient liquid remains on the surface to maintain uniform slipping properties, overcoming the problem of non-uniform thin layer formation.
4Reliability
If excessive amount of lubricating liquid is applied to ensure complete coating of ruggedness, then slipping property is stabilized, but liquid wastage increases
Solution Approach 1:
The invention utilizes the vertical dimension by allowing lubricating liquid to flow down from the upper portions of the container and form a liquid pool at the periphery of the upper end face. This dimensional approach creates a reservoir of lubricating liquid that continuously replenishes the coating on the rugged surface, ensuring stable slipping properties while managing the total liquid usage more efficiently than uniform thick coating would require.
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 provides stable and improved slipping properties by forming a liquid pool that aids in the discharge of viscous contents, reducing the risk of lubricating liquid wastage and maintaining performance over time, while simplifying the production process and avoiding thickness variations.
Implementation Method 1
a coating layer of a lubricating liquid for improving slipping property to the fluid content is formed
Implementation Method 2
The ruggedness is formed as fine protrusions having a height of not less than 0.7 μm, the fine protrusions have a pitch greater than the height
Implementation Method 3
an excessive amount of the lubricating liquid for forming a coating layer means a sufficient amount such that the lubricating liquid flows down to form a liquid pool at a periphery of an upper end face of the fluid content contained in the container body in a state of being held upright
Data Source
Figure 1(A)~1(C)
Figure 2
AI summary
A package including a container body 1 containing a fluid content 3 with leaving a head space 7, wherein the container body 1 has an inner surface 1a on which ruggedness is formed entirely, the inner surface 1a with the ruggedness of the container body 1 is coated with a lubricating liquid 30 immiscible with the fluid content 3, and the lubricating liquid 30 is present as a coating layer interposed between the inner surface 1a and the fluid content 3, and the lubricating liquid 30 for forming the coating layer forms a liquid pool 31 at a periphery of an upper end face of the fluid content 3 contained in the container body 1 in a state of being held upright.