Polyolefin-Polyamide Damping Material With Structural Rigidity
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Solution Overview
Problem
Existing vibration absorbing materials, such as rubber and synthetic resin composites, either lack mechanical strength or require separate attachment, impairing productivity and complicating integration into structural materials.
Innovation Solution
A vibration absorbing material composed of a polyolefin resin, polyamide resin, and a modified elastomer with reactive groups, forming a continuous and dispersed phase structure, which provides mechanical strength and effective vibration absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rubber material is used as a vibration absorbing material, then vibration absorbing performance is improved, but mechanical strength (rigidity) deteriorates
Solution Approach 1:
The patent uses a composite material system consisting of a polyolefin resin base material and a polyamide resin coating layer. The polyolefin provides mechanical strength and rigidity, while the polyamide layer with elastomer particles provides vibration damping. This composite structure allows the single molded material to simultaneously achieve both structural integrity and vibration absorption without requiring separate rubber attachments.
2Reliability
If vibration absorbing material is attached separately to vibration absorbed material, then vibration absorption is improved, but productivity deteriorates
Solution Approach 1:
The patent merges the vibration absorbing function and the structural material function into a single integrated molded material. The vibration damping layer is formed as an integral part of the structural component through co-molding or coating processes, eliminating the need for separate attachment steps. This integration significantly improves productivity while maintaining effective vibration absorption.
3Weight of moving object
If synthetic resin is used as structural material to reduce weight, then weight is reduced, but vibration absorbing ability deteriorates
Solution Approach 1:
The patent applies local quality modification by adding a specific polyamide resin coating layer containing elastomer particles to the polyolefin structural material. This localized modification of the material composition at the surface layer provides vibration damping properties specifically where needed, while the bulk polyolefin structure maintains its lightweight characteristics. This allows the material to remain lightweight while gaining vibration absorption capability.
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 material exhibits excellent vibration absorption performance in the human audible band without separate attachment, maintaining mechanical strength and rigidity, thus enhancing productivity and integration into structural materials.
Implementation Method 1
a modified elastomer having a reactive group that reacts with the polyamide resin
Implementation Method 2
exhibits excellent vibration absorbing ability by itself as a molding material
Data Source
AI summary
A vibration absorbing material contains a polyolefin resin, a polyamide resin, and a modified elastomer having a reactive group that reacts with the polyamide resin. When the total of the polyolefin resin, the polyamide resin and the modified elastomer is 100% by mass, the proportion of the polyolefin resin is 10% by mass or more and 90% by mass or less, the proportion of the polyamide resin is 3% by mass or more and 85% by mass or less, and the proportion of the modified elastomer is 3% by mass or more and 35% by mass or less. The vibration absorbing material contains a thermoplastic resin including a continuous phase (A) containing the polyolefin resin and a dispersed phase (B) dispersed in the continuous phase (A) and containing the polyamide resin.