Modified Resin Golf Ball Impact Resilience
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Solution Overview
Problem
Current resins used in golf balls and other molded articles lack optimal impact resilience coefficient, hardness, and flexural stiffness, which are crucial for performance and durability.
Innovation Solution
A modified ethylene/unsaturated carboxylic acid copolymer is developed by incorporating at least one guanidine compound, such as guanidine derivatives or salts, with a specific melt flow rate and molar ratio of guanidino groups to carboxyl groups, enhancing the resin's mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional resins are used for molded articles and golf balls, then manufacturing is simple and cost-effective, but impact resilience coefficient, hardness, and flexural stiffness are insufficient
Solution Approach 1:
The patent uses composite materials by combining ethylene/unsaturated carboxylic acid copolymer with guanidine compounds to achieve superior mechanical properties. The specific composition (copolymer with 10-30 mass% unsaturated carboxylic acid units and guanidine compound at 0.05-0.8 molar ratio) creates a material that simultaneously provides high impact resilience coefficient, hardness, and flexural stiffness, resolving the contradiction between performance and complexity.
Solution Approach 2:
The patent applies parameter changes by precisely controlling the melt flow rate of the ethylene/unsaturated carboxylic acid copolymer (20-600 g/10 minutes) and the molar ratio of guanidino groups to carboxyl groups (0.05-0.8). These parameter optimizations enable the resin to achieve excellent mechanical properties while maintaining ease of molding, thus improving impact resilience without significantly increasing complexity.
2Strength
If conventional resins are used for molded articles and golf balls, then manufacturing is simple and cost-effective, but hardness and flexural stiffness are insufficient
Solution Approach 1:
The patent employs composite materials by formulating a resin composition containing ethylene/unsaturated carboxylic acid copolymer and guanidine compounds. This composite structure provides enhanced hardness and flexural stiffness through the synergistic interaction between the copolymer matrix and guanidine compound, achieving superior mechanical properties while maintaining manageable manufacturing complexity.
Solution Approach 2:
The patent optimizes parameters by controlling the content of unsaturated carboxylic acid constituent units (10-30 mass%) and the guanidine compound addition ratio (0.05-0.8 molar ratio of guanidino groups to carboxyl groups). These parameter adjustments enable the resin to achieve high hardness and flexural stiffness while keeping the composition within practical manufacturing ranges.
3Strength
If conventional resins are used for molded articles and golf balls, then manufacturing is simple and cost-effective, but flexural stiffness is insufficient
Solution Approach 1:
The patent utilizes composite materials by combining ethylene/unsaturated carboxylic acid copolymer with guanidine compounds to achieve high flexural stiffness. The specific formulation (copolymer with controlled unsaturated carboxylic acid content and optimized guanidine compound ratio) creates a rigid yet tough material structure, improving flexural stiffness without excessive manufacturing complexity.
Solution Approach 2:
The patent applies parameter changes by optimizing the melt flow rate of the copolymer (20-600 g/10 minutes) and the molar ratio of guanidine compound to copolymer (0.05-0.8). These parameter controls enable the resin to achieve high flexural stiffness while maintaining processability, thus resolving the contradiction between performance enhancement and manufacturing simplicity.
Data Source
AI summary
The present invention is a modified resin for a molded article obtained by modifying an ethylene/unsaturated carboxylic acid copolymer with guanidine carbonate, wherein a melt flow rate of the ethylene/unsaturated carboxylic acid copolymer is 20 (g/10 minutes) or more and 600 (g/10 minutes) or less.