Golf Ball Cover Composite for Resilience and Shot Feeling
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Solution Overview
Problem
Existing golf ball technologies face challenges in achieving good shot feeling and durability while maintaining resilience, especially when using hard cover materials.
Innovation Solution
A golf ball design featuring a spherical core with a cover composed of one or more layers, where at least one cover layer includes a base resin and a member selected from polyrotaxane, polyethylene oxide, polypropylene oxide, polycaprolactone, or liquid polymer, with specific surface roughness and peak curvature criteria (Sa×Spc≥100) to ensure effective stress dispersion and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a hard cover material (ionomer resin with high Shore D hardness) is used to improve resilience and flight distance, then the golf ball travels greater distance, but the shot feeling deteriorates
Solution Approach 1:
The patent uses a composite material system combining ionomer resin base material with dispersed additive particles (organic or inorganic). This composite structure allows the cover to maintain high resilience from the ionomer resin while the dispersed additives create microstructural features that improve shot feeling by moderating the impact characteristics and stress distribution during ball-surface interaction.
Solution Approach 2:
The patent applies local quality by dispersing additive particles throughout the ionomer resin matrix, creating localized regions with different mechanical properties. These dispersed particles create micro-heterogeneity in the cover structure that modifies stress distribution and impact response locally, improving shot feeling while preserving overall resilience.
2Use of energy by moving object
If a hard cover material is used to improve resilience, then the golf ball maintains high rebound performance, but durability deteriorates
Solution Approach 1:
The composite material system of ionomer resin with dispersed additive particles creates a multi-phase structure that combines the resilience benefits of hard ionomer with the durability enhancement from the dispersed additives. The additive particles act as reinforcement elements that improve wear resistance and structural integrity while maintaining the elastic rebound properties of the ionomer matrix.
Solution Approach 2:
The patent modifies the physical and chemical parameters of the ionomer resin by incorporating additives that change the material's mechanical properties. The dispersed particles alter stress distribution, crack propagation behavior, and wear characteristics, thereby improving durability without significantly compromising the resilience provided by the ionomer base material.
3Use of energy by moving object
If ionomer resin is used to improve resilience and flight distance, then the golf ball achieves greater performance, but shot feeling deteriorates
Solution Approach 1:
The patent creates a composite material where ionomer resin serves as the resilient base matrix and dispersed additive particles (organic or inorganic) create microstructural features that improve shot feeling. The interaction between the ionomer matrix and dispersed particles modifies impact characteristics, creating a more favorable shot feeling while preserving the high resilience needed for distance performance.
Data Source
AI summary
An object of the present disclosure is to provide a golf ball having good shot feeling and excellent durability and not having lowered resilience even if a hard cover material is used. The present disclosure provides a golf ball comprising a spherical core, and a cover disposed outside the spherical core and composed of one or more layers, wherein at least one cover layer contains (A) a base resin, and (B) at least one member selected from the group consisting of a polyrotaxane, a polyethylene oxide, a polypropylene oxide, a polycaprolactone and a liquid polymer, and Sa×Spc≥100 wherein Sa (μm) is an arithmetic mean roughness of a surface of a cut plane of the cover, and Spc (mm−1) is an arithmetic mean curvature of a summit of the surface of the cut plane of the cover.