Racket Grip 3D-Tape Density Gradient Friction
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Solution Overview
Problem
Existing racket grip tapes have reduced liquid absorption capability and surface friction due to ink patterns blocking pores and smooth surfaces, respectively.
Innovation Solution
A method of manufacturing a racket grip 3D-tape by coating a substrate with polyurethane of different densities, creating an uneven surface that enhances friction without compromising liquid absorption, using a multi-step process involving spraying, impregnation, and bake-drying to achieve a visually attractive and functional design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If patterns and logos are printed on the surface of the racket grip tape in inks of different colors, then the racket grip tape becomes visually attractive, but the inks block the liquid-permeable pores and reduce liquid absorption capability
Solution Approach 1:
The patent removes the harmful element (ink printing) entirely and replaces it with an alternative approach (embedding colored particles within the polyurethane foam structure). This extraction of the problematic surface printing method allows the pores to remain open and functional while still achieving visual attractiveness through the colorful foam structure itself.
Solution Approach 2:
The patent introduces colored particles as an intermediary substance embedded within the polyurethane foam matrix. These particles provide visual attractiveness without blocking the pores, as they are integrated into the foam structure rather than applied as surface ink. The colored particles serve as a mediator between the structural foam and the visual appearance requirement.
2Illumination intensity
If the surface of the racket grip tape is made flat and smooth with patterns and logos, then the design is visually appealing, but the surface friction is significantly reduced when contacting sweat or rainwater
Solution Approach 1:
The patent applies curvature to the surface by creating an uneven, three-dimensional foam structure instead of a flat surface. The polyurethane foam's natural cellular structure provides surface irregularities that increase friction when contacting sweat or rainwater, while still allowing the foam to be colored for visual attractiveness. The curved, porous surface topology simultaneously achieves both visual appeal and enhanced grip.
3Stability of the object's composition
If polyurethane coating is applied to the substrate, then the structure is stabilized, but the surface becomes flat and smooth reducing friction
Solution Approach 1:
The patent utilizes porous polyurethane foam material that maintains structural stability through its cellular structure while inherently providing surface irregularities. The foam's porous nature prevents the formation of a smooth, flat surface, thereby maintaining high friction characteristics when contacting sweat or rainwater, even while providing structural stabilization to the grip tape.
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 method results in a racket grip tape with improved surface friction and retained liquid absorption capability, maintaining visual appeal without ink coverage.
Implementation Method 1
coating a substrate with polyurethane of at least two different densities
Implementation Method 2
augment liquid absorption capability thereof
Data Source
AI summary
Provided is a method of manufacturing a racket grip 3D-tape, which entails coating a substrate with polyurethane of at least two different densities. Heavier polyurethane sinks, but lighter polyurethane rises, thereby resulting in unevenness of the surface of the racket grip 3D-tape.