Golf Ball Resin Composition for Balancing Resilience and Shot Feeling
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Solution Overview
Problem
Conventional golf ball resin compositions face challenges in balancing shot feeling and resilience, as increasing stiffness to enhance resilience often compromises shot feeling, and vice versa.
Innovation Solution
A golf ball resin composition with specific bending stiffness and hardness ranges, combined with a thermoplastic resin and carbonaceous filler, where the thermoplastic resin includes metal ion-neutralized copolymers and the carbonaceous filler has polar functional groups, to maintain resilience while improving shot feeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the stiffness of the constituent member is increased to increase resilience, then resilience is improved, but shot feeling is lowered
Solution Approach 1:
The patent applies parameter changes by precisely controlling the bending stiffness within a specific range (300-24,000 kgf/cm² at 3°-12° bending angle) and the bending stiffness ratio (M3-12/M24-30) between 0.20-2.00. This quantitative parameter optimization allows the cover material to achieve both high resilience and excellent shot feeling, resolving the contradiction between these two properties.
Solution Approach 2:
The patent uses composite materials by combining thermoplastic resin with carbonaceous filler (such as carbon nanotubes or graphite particles) to create a cover material that exhibits both high resilience and good shot feeling. The composite structure allows the material to maintain flexibility while providing the necessary stiffness for energy conversion, thus achieving both improved resilience and maintained shot feeling.
2Reliability
If a filler such as organic short fiber, metal or clay mineral is blended into the constituent member to improve golf ball performance, then resilience is enhanced, but shot feeling is compromised
Solution Approach 1:
The patent specifies precise parameters for the carbonaceous filler including particle size (0.1-10 μm), aspect ratio (2-1000), and content (0.1-50 parts by mass per 100 parts by mass of thermoplastic resin). These controlled parameters ensure that the filler enhances resilience while maintaining shot feeling, avoiding the compromise seen in conventional fillers.
Solution Approach 2:
The patent applies local quality by ensuring uniform dispersion of carbonaceous filler particles throughout the thermoplastic resin matrix. This localized distribution of filler at the micro-scale (0.1-10 μm) allows different regions of the cover material to exhibit appropriate properties - stiff enough for resilience but flexible enough for shot feeling - thereby resolving the contradiction.
Data Source
AI summary
An object of the present invention is to provide a golf ball exhibiting an excellent shot feeling and resilience, and a constituent material thereof. The present invention provides a golf ball resin composition having a bending stiffness (M3-12) ranging from 300 kgf/cm2 to 24,000 kgf/cm2 at a bending angle from 3° to 12°, a ratio (M3-12/M24-30) of the bending stiffness (M3-12) at the bending angle from 3° to 12° to a bending stiffness (M24-30) at a bending angle from 24° to 30° ranging from 0.20 to 2.00, and a slab hardness ranging from 30 to 65 in Shore D hardness.