Golf Ball Surface Minute Projections Stain Resistance
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Solution Overview
Problem
Golf balls face challenges in achieving high spin rates on long iron shots while maintaining stain resistance and washability, as existing technologies either fail to effectively remove dirt without manual effort or compromise aerodynamic performance.
Innovation Solution
A golf ball design featuring a core and cover with minute projections on its surface, where the exposed portions have specific height and area ratios, reducing lift force and enhancing stain resistance and washability without a paint layer, thereby achieving a balance in flight distance and cleanliness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the golf ball has a smooth surface, then aerodynamic performance is improved, but stain resistance deteriorates
Solution Approach 1:
The patent applies local quality by creating minute projections only in specific regions (dimple bottoms) rather than uniformly across the entire surface. This localized structuring allows the ball to maintain smooth aerodynamic surfaces while having stain-resistant zones where projections prevent mud adhesion and facilitate dirt removal.
Solution Approach 2:
The minute projections create a micro-structured surface that functions similarly to porous materials by providing air pockets and irregular surfaces that reduce mud adhesion. The projections with heights of 0.5-50 μm create a textured surface that repels contaminants while maintaining overall surface smoothness for aerodynamic performance.
2Speed
If the golf ball has large roughness, then aerodynamic characteristic is enhanced, but spin rate deteriorates
Solution Approach 1:
The patent applies local quality by creating minute projections only in specific regions (dimple bottoms) rather than uniformly across the entire surface. This localized structuring allows the ball to maintain smooth aerodynamic surfaces while having stain-resistant zones where projections prevent mud adhesion and facilitate dirt removal.
Solution Approach 2:
The patent applies parameter changes by precisely controlling the dimensions of minute projections (heights of 0.5-50 μm, diameter ratios of 5-50 μm, area ratios of 1-20%) to achieve the desired balance between aerodynamic performance and spin rate. These specific parameter ranges optimize both flight characteristics and rotational stability.
3Object-affected harmful factors
If the golf ball has minute projections with large area ratio, then stain resistance is improved, but aerodynamic performance deteriorates
Solution Approach 1:
The patent applies local quality by creating minute projections only in specific regions (dimple bottoms) rather than uniformly across the entire surface. This localized structuring allows the ball to maintain smooth aerodynamic surfaces while having stain-resistant zones where projections prevent mud adhesion and facilitate dirt removal.
Solution Approach 2:
The patent applies parameter changes by precisely controlling the dimensions of minute projections (heights of 0.5-50 μm, diameter ratios of 5-50 μm, area ratios of 1-20%) to achieve the desired balance between aerodynamic performance and spin rate. These specific parameter ranges optimize both flight characteristics and rotational stability.
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 golf ball achieves a large flight distance on long iron shots with excellent stain resistance and washability, maintaining a high spin rate without excessive lift, and preventing mud adhesion and easy dirt removal.
Implementation Method 1
The dimples disturb the air flow around the golf ball during flight to cause turbulent flow separation. This phenomenon is referred to as 'turbulization'.
Implementation Method 2
Due to the turbulization, separation points of the air from the golf ball shift backward leading to a reduction of drag.
Implementation Method 3
The surface of the golf ball has an arithmetic average height Sa of not less than 0.5 μm and not greater than 30 μm. An average value Hav of heights H of the exposed portions is not less than 0.5 μm and not greater than 50 μm.
Data Source
AI summary
A golf ball has a plurality of dimples 12 and a land 14 on a surface thereof. The golf ball further has a large number of minute projections 18 formed on surfaces of the dimples 12 and the land 14. The minute projections 18 are exposed on the surface of the golf ball. The surface of the golf ball has an arithmetic average height Sa of not less than 0.5 μm and not greater than 30 μm. The surface of the golf ball has a maximum height Sz of not less than 5 μm and not greater than 200 μm.