Container Surface Coating for Viscous Product Discharge
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Solution Overview
Problem
Existing container designs fail to effectively discharge viscous substances like mayonnaise and ketchup due to poor slipping properties, which lead to adhesion and incomplete discharge, especially when using materials like plastic or glass containers.
Innovation Solution
A surface structure is created by distributing solid particles of vegetable fat and oil on the inner surface of containers, held by a small amount of edible oil, forming an air layer that enhances slipping properties and sustains them over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a liquid film is formed on the container surface to improve slipping properties, then the slipping property is strikingly improved, but the slipping property does not last long and decreases after long periods of time
Solution Approach 1:
The invention combines solid particles (vegetable fat and oil particles with specific gravity less than water) dispersed in a water-soluble polymer solution to create a composite coating system. This composite structure provides both immediate slipping property improvement and long-term sustainability, as the solid particles remain suspended in the polymer matrix over extended periods
Solution Approach 2:
The invention specifies precise parameter ranges: solid particle concentration (0.1-10 wt%), polymer concentration (0.1-10 wt%), particle size (1-100 μm), and specific gravity (less than water). By optimizing these parameters, the coating maintains stable slipping properties for long durations while preventing particle sedimentation
2Ease of operation
If liquid protuberances are formed on the container surface to improve slipping property, then the slipping property is greatly improved, but the production involves difficulty and surface roughness control is very difficult
Solution Approach 1:
The invention extracts the surface-roughening function from the container substrate and transfers it to a separate applyable coating layer. This allows the slipping property to be achieved through a simple coating process rather than complex substrate modification, significantly easing manufacturing while maintaining effective slipping performance
3Productivity
If the container surface is made smooth to allow viscous substances to flow, then the substances can move, but the substances adhere to the surface and cannot be all recovered
Solution Approach 1:
The dispersed solid particles in the polymer coating create a micro-porous or micro-rough surface structure that reduces adhesion points for viscous substances. This structure allows complete discharge of contents while minimizing residue, achieving both high productivity and low substance loss
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 surface structure allows for quick and complete discharge of viscous substances, minimizing adhesion and maintaining excellent slipping properties even with emulsified products like mayonnaise, ensuring nearly all content is used without residue.
Implementation Method 1
an air layer is present in gaps among the solid particles that are close to the surface of the formed body
Implementation Method 2
the surface exhibits excellent slipping property to viscous water-containing substances and sustains the slipping property
Data Source
AI summary
A structure including a formed body (1) and solid particles (3) distributed on a surface of the formed body (1) by being externally added thereto, wherein the solid particles (3) are held on the surface of the formed body (1) in a form of being covered with a very small amount of an oily liquid (5), and an air layer (7) is present in gaps among the solid particles (3) that are close to the surface of the formed body (1).