Golf Ball Paint Layer Indentation Depth Control
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Solution Overview
Problem
Existing golf balls with paint layers face challenges in accurately measuring physical properties, leading to insufficient spin performance, feel at impact, and stain resistance due to inadequate measurement methods.
Innovation Solution
A golf ball design with a paint layer having an indentation depth of 300 nm to 3000 nm and a thickness of 5 μm to 50 μm, applied using a polyurethane-based resin composition, which contributes to excellent spin performance, feel at impact, and stain resistance, along with an evaluation method involving cross-sectional measurement of the paint layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the paint layer is made thinner to improve spin performance, then spin performance improves, but measurement accuracy deteriorates because it becomes difficult to directly measure physical properties
Solution Approach 1:
The patent introduces an intermediary measurement approach by measuring the indentation depth of the paint layer indirectly through the cover material's response. Instead of directly measuring the thin paint layer's physical properties, the method uses the cover's deformation characteristics to infer paint layer properties, solving the measurement difficulty caused by the paint layer's thinness while maintaining spin performance optimization
2Measurement precision
If the paint layer thickness is increased to improve measurement accuracy, then measurement accuracy improves, but spin performance deteriorates
Solution Approach 1:
The patent replaces direct mechanical measurement of the paint layer with an indirect measurement system that uses indentation testing on the cover. This substitution allows accurate characterization of the paint layer's effect on spin performance without requiring the paint layer to be thick enough for direct measurement, thus maintaining optimal spin performance while achieving measurement accuracy
3Ease of operation
If the paint layer is made softer to improve feel at impact, then feel at impact improves, but spin performance deteriorates
Solution Approach 1:
The patent optimizes the paint layer's physical parameters, specifically controlling the indentation depth within a precise range (300-3000 nm). This parameter optimization allows the paint layer to provide soft feel at impact while maintaining sufficient hardness to generate adequate spin, resolving the contradiction between comfort and performance
4Reliability
If the paint layer is made harder to improve spin performance, then spin performance improves, but feel at impact deteriorates
Solution Approach 1:
The patent precisely controls the paint layer's indentation depth parameter within the range of 300-3000 nm, creating an optimal balance point. This parameter optimization enables the paint layer to be hard enough to generate good spin performance while remaining soft enough to provide comfortable feel at impact
5Object-affected harmful factors
If the paint layer thickness is increased to improve stain resistance, then stain resistance improves, but spin performance and feel at impact deteriorate
Solution Approach 1:
The patent optimizes the paint layer thickness and indentation depth parameters to fall within specific ranges (indentation depth: 300-3000 nm, thickness: 5-50 μm). This parameter optimization achieves sufficient stain resistance while maintaining the paint layer thin enough to preserve spin performance and feel at impact
Data Source
AI summary
A golf ball 2 includes a main body 4 and a paint layer 6 positioned outside the main body 4. The main body 4 includes a spherical core 8, a mid layer 10 positioned outside the core 8, and a cover 12 positioned outside the mid layer 10. An indentation depth, measured when the paint layer 6 in a cross-section along a plane passing through a central point of the golf ball 2 is pressed by a force of 30 mgf in a direction perpendicular to the cross-section, is not less than 300 nm and not greater than 3000 nm. The paint layer 6 preferably has a thickness of not less than 5 μm and not greater than 50 μm.