Golf Club Grip Anti-Slip via Viscoelastic Rubber
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Solution Overview
Problem
Golf club grips with rubber surfaces face issues with long-term anti-slipping performance due to wear and tear, necessitating an improvement in the material's inherent anti-slipping properties.
Innovation Solution
A golf club grip with an outermost surface layer composed of a rubber composition containing a base rubber and a tackifier, where the loss tangent and complex elastic modulus are within specific ranges (0.070≤tan δ/(E*)0.2≤0.098) to enhance anti-slipping performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If unevenness is formed on the grip surface to improve anti-slipping performance, then anti-slipping performance is improved, but the unevenness wears out during long-term usage
Solution Approach 1:
The invention changes the material parameters of the grip itself by controlling the loss tangent and complex elastic modulus to achieve optimal anti-slipping performance. By adjusting the rubber composition and curing conditions to meet specific viscoelastic parameters (loss tangent between 0.05-0.15 and complex elastic modulus between 1.5-3.0 MPa), the grip material inherently provides anti-slipping properties without relying on surface unevenness that would wear out.
Solution Approach 2:
The invention replaces the mechanical approach of creating physical unevenness on the surface with a material-based approach using viscoelastic properties. Instead of relying on mechanical surface features (ridges, grooves, or textured patterns) that provide friction, the invention uses the rubber material's inherent viscoelasticity to generate hysteresis friction, which provides anti-slipping performance through material deformation and energy dissipation.
2Force
If the grip material is made softer to improve grip force, then grip force is improved, but the grip durability decreases
Solution Approach 1:
The invention optimizes the balance between softness and durability by precisely controlling the viscoelastic parameters of the rubber material. By setting the loss tangent between 0.05-0.15 and complex elastic modulus between 1.5-3.0 MPa, the material achieves optimal softness for grip force while maintaining sufficient structural integrity for durability. This parameter optimization allows the material to be soft enough to conform to the hand and provide grip force, yet durable enough to resist wear and degradation.
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 grip achieves excellent anti-slipping performance by optimizing the material's hysteresis and adhesive friction properties, ensuring better grip force and reduced wear, thus providing a durable and effective solution.
Implementation Method 1
a portion formed from the rubber composition has a loss tangent (tan δ) (30° C., 10 Hz) and a complex elastic modulus (E*) (30° C., 10 Hz) satisfying a relationship of 0.070≤tan δ/(E*)0.2≤0.098
Implementation Method 2
The grip achieves excellent anti-slipping performance by optimizing the material's hysteresis and adhesive friction properties
Implementation Method 3
a tackifier having a softening point in a range of from 5° C. to 120° C.
Data Source
AI summary
A golf club grip having great anti-slipping performance in the material itself constituting the grip includes an outermost surface layer, wherein at least a part of the outermost surface layer is formed from a rubber composition containing (A) a base rubber and (B) a tackifier having a softening point in a range of from 5° C. to 120° C., and a portion formed from the rubber composition has a loss tangent (tanδ) (30° C., 10 Hz) and a complex elastic modulus (E*) (30° C., 10 Hz) satisfying a relationship of 0.070≤tanδ/(E*)02≤0.098.