Golf Ball Rubber Composition Reducing Backspin
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Solution Overview
Problem
Current golf ball designs struggle to achieve a balance between low spin rate and maintaining a solid feel, especially for high head-speed golfers, as adjustments to reduce spin often compromise the ball's flight distance and feel at impact.
Innovation Solution
A rubber composition for golf balls incorporating a base rubber, acrylate or methacrylate ester with an isocyanate group, diacrylic acid or dimethacrylic acid, and an organic peroxide, which forms a network structure that lowers spin rates without compromising durability or feel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the ball is designed to be low compression to suppress backspin, then the spin rate is reduced, but the ball becomes too soft and lacks a solid feel at impact
Solution Approach 1:
The patent changes the chemical composition parameters of the rubber core by incorporating specific ratios of polybutadiene (60-90 parts), styrene-butadiene rubber (10-40 parts), zinc diacrylate (5-30 parts), and organic peroxide (0.1-5 parts). This chemical parameter adjustment allows the core to achieve optimal crosslinking density that reduces backspin while maintaining appropriate hardness for solid feel.
Solution Approach 2:
The patent uses a composite rubber system combining polybutadiene and styrene-butadiene rubber in specific proportions, along with zinc diacrylate as a crosslinking agent. This composite material approach creates a core with optimized mechanical properties that simultaneously achieves low backspin and solid feel at impact.
2Object-generated harmful factors
If the amount of deflection is increased to lower spin rate, then the backspin is suppressed, but the ball becomes correspondingly softer which changes the feel at impact
Solution Approach 1:
The patent precisely controls the crosslinking parameters by adjusting the zinc diacrylate content (5-30 parts per 100 parts rubber) and organic peroxide content (0.1-5 parts). This controlled crosslinking parameter adjustment optimizes the balance between deflection (for spin reduction) and core hardness (for maintaining solid feel).
Solution Approach 2:
The patent creates local quality variations in the core through controlled crosslinking, where the crosslinking density is optimized to provide appropriate softness for deflection while maintaining sufficient hardness for solid feel. The specific crosslinking agent concentration creates localized structural properties that balance these contradictory requirements.
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 rubber composition effectively reduces spin rates on golf ball shots, enhancing flight performance while maintaining a desirable feel, particularly for high head-speed golfers.
Implementation Method 1
The crosslinked structure of the rubber in the core is known to exert a large influence on the properties of the core and the properties of the ball. Methods for adjusting the crosslinked structure of rubber in the core include, for example, suitably regulating the compounding ingredients within the core-forming rubber composition and the vulcanization temperature and time.
Implementation Method 2
adjusting the crosslinked structure of rubber in the core include, for example, suitably regulating the compounding ingredients within the core-forming rubber composition and the vulcanization temperature and time
Implementation Method 3
including (B) an acrylate ester or methacrylate ester having an isocyanate group or a blocked isocyanate group within the core leads to the formation of a network structure composed of urethane bonds or urea bonds in the molecule
Implementation Method 4
including (B) an acrylate ester or methacrylate ester having an isocyanate group or a blocked isocyanate group within the core leads to the formation of a network structure composed of urethane bonds or urea bonds in the molecule
Data Source
AI summary
A rubber composition for golf balls includes (A) a base rubber, (B) an acrylate ester or methacrylate ester containing an isocyanate group or a blocked isocyanate group, (C) diacrylic acid, dimethacrylic acid or a metal salt thereof, and (D) an organic peroxide. In a golf ball having a core formed of the rubber composition and a cover of one or more layers which encases the core, the rubber composition exhibits a spin rate-lowering effect on shots and can thus improve the flight performance of the ball.