Golf Club Grip Inner Layer Collapse Resistance
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Solution Overview
Problem
Multiple layered golf club grips, particularly those with a foamed inner layer, are prone to collapse and degradation due to ozone exposure.
Innovation Solution
A golf club grip design featuring a cylindrical inner layer formed from an acrylonitrile-butadiene based rubber composition with a maximum torque value of 0.5 N·m or more, providing enhanced stability and weather resistance, and a cylindrical outer layer for improved durability and abrasion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a foamed inner layer is used in a multiple layered golf club grip, then weight reduction and comfort are improved, but the grip becomes prone to collapse and ozone degradation
Solution Approach 1:
The patent changes the chemical composition parameters of the inner layer by specifying acrylonitrile-butadiene based rubber with a maximum torque value of 0.5 N·m or more in the vulcanization curve. This parameter change transforms the inner layer from a conventional foamed structure prone to collapse into a resilient material that maintains structural integrity while providing weight reduction and comfort benefits.
Solution Approach 2:
The patent employs composite material strategy by combining acrylonitrile-butadiene based rubber with specific torque characteristics with an outer layer having higher density. This composite structure creates a multi-layered grip where the inner layer provides lightweight comfort and the outer layer provides structural support and ozone resistance, resolving the contradiction between weight reduction and reliability.
2Ease of operation
If the inner layer density is reduced for comfort, then ease of operation is improved, but the inner layer becomes more susceptible to collapse
Solution Approach 1:
The patent applies parameter changes by specifying the maximum torque value of 0.5 N·m or more in the vulcanization curve, which fundamentally alters the mechanical properties of the inner layer. This enables the inner layer to maintain low density for comfort while the modified rubber composition provides inherent structural stability and resistance to collapse.
Solution Approach 2:
The patent implements local quality by creating different density and composition characteristics in different layers. The inner layer has lower density optimized for comfort with specific rubber composition, while the outer layer has higher density for structural support. This local differentiation allows each layer to optimize its function without compromising the other.
3Ease of manufacture
If conventional rubber composition is used in the inner layer, then ease of manufacture is improved, but weather resistance and collapse resistance are insufficient
Solution Approach 1:
The patent specifies precise parameter changes by defining the maximum torque value of 0.5 N·m or more in the vulcanization curve at 165°C. This quantitative parameter specification provides clear manufacturing guidance while achieving superior weather resistance and collapse resistance, balancing ease of manufacture with enhanced reliability.
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 grip is resistant to collapse and maintains performance in varying weather conditions, ensuring a stable and durable golfing experience.
Implementation Method 1
the inner layer rubber composition has a maximum torque value of 0.5 N·m or more in a vulcanization curve measured at a temperature of 165° C. and an amplitude angle of one degree
Data Source
AI summary
An object of the present disclosure is to provide a golf club grip comprising an inner layer that is hard to collapse and has excellent weather resistance. The present disclosure provides a golf club grip comprising a cylindrical portion having a cylindrical inner layer and a cylindrical outer layer provided outside the cylindrical inner layer, wherein the cylindrical inner layer is formed from an inner layer rubber composition containing an acrylonitrile-butadiene based rubber as (A1) a base rubber, and the inner layer rubber composition has a maximum torque value of 0.5 Nm or more in a vulcanization curve measured at a temperature of 165° C. and an amplitude angle of one degree.