Golf Ball Rubber Composition for Low Resilience Without Softening
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Solution Overview
Problem
Golf balls designed for restricted flight distances in space-limited driving ranges tend to become excessively soft when resilience is lowered, compromising their hardness.
Innovation Solution
A golf ball composition comprising a cured product of a rubber mixture containing natural rubber as the base rubber, with a controlled grafting ratio of a co-crosslinking agent ranging from 40 to 80 mass%, adjusting the hardness and resilience through specific ratios of natural and synthetic rubbers, and amounts of graft and non-graft polymers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the resilience of a golf ball is lowered to suit narrow driving ranges, then the golf ball can be used in space-limited environments, but the golf ball becomes excessively soft
Solution Approach 1:
The patent changes the chemical composition parameters of the rubber material by incorporating specific ratios of natural rubber (30-70 parts), synthetic rubber (10-50 parts), and co-crosslinking agents (5-20 parts) to achieve the desired balance between resilience and hardness. This compositional parameter adjustment allows the golf ball to maintain adequate hardness while reducing resilience for use in narrow driving ranges.
Solution Approach 2:
The patent uses a composite rubber material system combining multiple rubber types (natural rubber, synthetic rubber) with co-crosslinking agents and crosslinking initiators. This composite material approach enables independent optimization of different properties: natural rubber provides resilience reduction, while the crosslinking system maintains structural hardness, resolving the contradiction between these two properties.
2Productivity
If the resilience of a golf ball is lowered, then the flight distance is restricted for practice purposes, but the golf ball becomes excessively soft
Solution Approach 1:
The patent adjusts the chemical composition parameters, specifically controlling the content of co-crosslinking agents (5-20 parts per 100 parts base rubber) and crosslinking initiators (1-5 parts) to achieve the optimal balance between restricted flight distance (lowered resilience) and maintained hardness, enabling effective practice in restricted areas without compromising ball integrity.
Solution Approach 2:
The patent employs a composite rubber material system that combines natural rubber (for resilience control), synthetic rubber (for structural support), and co-crosslinking agents. This composite structure enables the golf ball to achieve restricted flight distance through lowered resilience while maintaining adequate hardness through the synergistic interaction of multiple material components.
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 maintains appropriate hardness while lowering resilience, enhancing performance in space-limited driving ranges.
Implementation Method 1
a cured product of a rubber composition containing (a) a base rubber, (b) a co-crosslinking agent and (c) a crosslinking initiator, (a) the base rubber contains (a1) a natural rubber, a grafting ratio of (b) the co-crosslinking agent in the cured product of the rubber composition ranges from 40 mass % to 80 mass %
Implementation Method 2
a cured product of a rubber composition containing (a) a base rubber, (b) a co-crosslinking agent and (c) a crosslinking initiator
Data Source
AI summary
An object of the present disclosure is to provide a golf ball having lowered resilience while maintaining the hardness of the golf ball. The present disclosure provides a golf ball comprising a constituent member, wherein at least a part of the constituent member is formed from a cured product of a rubber composition containing (a) a base rubber, (b) a co-crosslinking agent and (c) a crosslinking initiator, (a) the base rubber contains (a1) a natural rubber and a grafting ratio of (b) the co-crosslinking agent in the cured product of the rubber composition ranges from 40 mass % to 80 mass %.