Low-Adhesion Closure Material for Spill-Reducing Drainage
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Solution Overview
Problem
Existing closures for containers suffer from liquid adherence, leading to spillage and residue formation, which complicates re-closure and results in loss of liquid.
Innovation Solution
A closure formed from a polymer and a compound, such as a surfactant or lubricant, that reduces the surface energy and coefficient of adhesion, allowing liquids like coffee creamer, lactose, or water to drain back into the container, minimizing spillage and residue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional polymer closure is used, then the closure provides basic sealing function, but liquid adheres to the closure causing spillage and residue formation
Solution Approach 1:
The patent modifies the surface energy parameters of the closure material by incorporating compounds that lower surface energy. This parameter change causes liquids to bead up and drain back into the container rather than adhering to the closure surface, thereby reducing spillage and residue formation while maintaining the sealing function.
Solution Approach 2:
The patent creates a composite material system by combining conventional polymer with surface-active compounds (surfactants, lubricants, or wax-based compounds). This composite approach maintains the structural integrity and sealing properties of the polymer while adding liquid-repelling properties through the compound, resolving the contradiction between basic sealing and liquid drainage.
2Reliability
If the closure material has high surface energy, then liquid adheres strongly to the closure, but this causes spillage when the closure is opened
Solution Approach 1:
The patent changes the surface energy parameter of the closure material by adding compounds that lower surface energy. This modification reduces the harmful adhesion effect while maintaining adequate sealing through the base polymer structure, thereby eliminating residue formation without compromising closure reliability.
3Device complexity
If a polymer-only closure is used, then the closure is simple in composition, but liquid adheres to the closure surface
Solution Approach 1:
The patent develops a composite material formulation by combining polymer with small amounts of surface-active compounds. This composite approach maintains relative simplicity in closure composition and manufacturing while dramatically improving liquid drainage performance, as the compounds are incorporated during the molding process rather than requiring separate application steps.
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 closure effectively reduces liquid adherence and spillage by enhancing the drainage of liquids, maintaining container closure integrity and reducing residue formation.
Implementation Method 1
the first compound lowers a surface energy of a first liquid interfacing with the closure compared to a surface energy of the first liquid interfacing with only the polymer
Implementation Method 2
the first compound lowers a coefficient of adhesion between a first liquid and the closure compared to a coefficient of adhesion of the first liquid interfacing with only the polymer
Data Source
AI summary
A closure including a base and a cap that pivot with respect to each other. The closure includes a material that lowers the amount of spilled liquids retained on the closure, such as via adding a compound within the closure and/or adding a coating to one or more surfaces of the closure, thereby reducing an amount of liquid that is retained on the closure after a use.