Propylene Polymer Vibration Control Material High Temperature Resistance
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Solution Overview
Problem
Conventional materials for vibration control, such as those used in structural members and acoustic equipment, face limitations in thermal resistance, mechanical strength at high temperatures, and durability, leading to narrow temperature ranges and reduced effectiveness in preventing vibration and noise.
Innovation Solution
A material comprising a propylene polymer with specific properties, including a melting point of 90°C or below, combined with other polymers and inorganic fillers, providing excellent vibration-damping, sound-insulating, and sound-absorbing properties, along with improved thermal resistance and mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional materials for vibration control (rubber, asphalt, synthetic resin) are used, then vibration damping property is achieved at ordinary temperature, but thermal resistance deteriorates and mechanical strength is lowered at high temperature
Solution Approach 1:
The patent changes the molecular structure parameters of the propylene polymer by controlling the content of constitutional units (a) and (b) within specific ranges (60-100 mol% and 0-40 mol% respectively) and adjusting the melting point to 90°C or below, thereby achieving both vibration damping properties and improved high-temperature resistance
Solution Approach 2:
The patent creates a composite material system by blending propylene polymer with specific polymers having different melting points (one with Tm ≤90°C and another with Tm ≥100°C) in controlled weight ratios, combining the vibration damping properties of the low-melting polymer with the thermal stability of the high-melting polymer
2Reliability
If conventional materials for vibration control are used, then damping property is achieved, but mechanical strength at high temperature is significantly lowered
Solution Approach 1:
The patent combines propylene polymer with polymers having different melting points to create a composite system where the low-melting component (Tm ≤90°C) provides vibration damping while the high-melting component (Tm ≥100°C) maintains mechanical strength at elevated temperatures, achieving both damping property and thermal-mechanical stability
3Reliability
If conventional materials for vibration control are used, then vibration prevention is achieved at ordinary temperature, but weather resistance deteriorates and range of use is limited
Solution Approach 1:
The patent modifies the material parameters by controlling the melting point of the propylene polymer to 90°C or below and adjusting the compositional ratios of constitutional units, thereby expanding the operational temperature range and improving weather resistance while maintaining vibration prevention properties across diverse environmental conditions
Data Source
AI summary
A material for vibration control of the invention includes a propylene polymer (A) containing a constitutional unit (a) derived from propylene in the proportion of 40 to 100 mol % and a constitutional unit (b) derived from α-olefin having 2 to 20 carbon atoms excluding propylene in the proportion of 60 to 0 mol % [provided that the total of (a) and (b) is 100 mol %], and having a melting point measured by DSC of 90° C. or below or no observed melting point, and the material has excellent vibration controllability such as vibration damping property, vibration preventing property, sound insulating property, and sound absorbing property.