Multi-Layer Golf Ball Cover Using Thermoplastic Non-Acid Polymer
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Solution Overview
Problem
Current golf ball designs with ionomer cover materials tend to have a hard feel, leading to less control and lower initial spin, making it difficult for players to hit them properly, especially with approach shots using irons near the green.
Innovation Solution
A multi-layered golf ball construction using a thermoplastic non-acid polymer/plasticizer composition for the cover layers, specifically a three-layered assembly with an inner cover, intermediate cover, and outer cover, where the thermoplastic material comprises a non-acid polymer and a plasticizer, providing a softer feel and improved spin control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If ionomer cover materials are used, then impact durability and wear-resistance are improved, but the ball feel becomes hard and spin control deteriorates
Solution Approach 1:
The patent uses composite materials by combining ionomer resin with elastomeric polymers in the cover layers. This creates a multi-material construction where the ionomer provides durability and wear-resistance while the elastomeric components provide softness and spin control, resolving the contradiction between hard durability and soft controllability
Solution Approach 2:
The patent applies different material properties to different cover layers. The inner cover layer uses ionomer resin for durability, while the outer cover layer incorporates elastomeric polymers for softness and spin control. This local differentiation allows each layer to optimize its function, balancing durability and controllability
2Strength
If ionomer cover materials are used, then toughness is improved, but the ball feel becomes hard and player control deteriorates
Solution Approach 1:
The cover construction combines ionomer resin (providing toughness) with elastomeric polymers (providing soft feel and control). This composite approach allows the ball to maintain structural integrity while providing a softer feel that enhances player control during approach shots
Solution Approach 2:
Different cover layers use different material compositions: the inner layer emphasizes toughness with ionomer, while the outer layer emphasizes softness and control with elastomeric polymers. This local quality differentiation resolves the contradiction between overall toughness and surface-level player control
Data Source
AI summary
Multi-layered golf balls containing a three-layered cover assembly are provided. For example, a cover assembly having an inner cover, intermediate cover, and outer cover layer may be prepared. At least one of the cover layers is formed from a thermoplastic composition that preferably comprises: a) thermoplastic non-acid polymer, and b) plasticizer. A fatty acid ester such as ethyl oleate is preferably used as the plasticizer. Suitable non-acid polymers include, for example, polyesters, polyamides, polyolefins, and polyurethanes. The cover assembly has good impact durability and helps provide the ball with relatively high resiliency at given compressions.