Weldable Silicone Adhesive Vibration Damping
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Solution Overview
Problem
Existing weldable adhesives used in metal assemblies often require additional noise and vibration damping treatments, which increase production costs and time, and may not adequately reduce noise or vibration in welded vehicle components.
Innovation Solution
A weldable and vibration damping adhesive composition comprising a silicone-based matrix with electrically conductive or metallic particulates and a crosslinker, which exhibits a composite loss factor greater than 0.10 at specific frequencies, allowing for effective noise and vibration reduction without the need for additional coatings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If weldable adhesives are used to join metal assemblies, then the assembly strength and rigidity are improved, but additional noise and vibration damping treatments are required which increase production costs and time
Solution Approach 1:
The patent combines welding and vibration damping functions into a single adhesive composition. The adhesive contains electrically conductive fillers (for welding) and viscoelastic polymers (for vibration damping) integrated throughout the matrix, eliminating the need for separate damping treatments and reducing production steps
Solution Approach 2:
The adhesive composition performs multiple functions simultaneously: it provides structural bonding strength, enables electrical welding through conductive fillers, and delivers vibration damping through viscoelastic properties. This multi-functional material replaces what would traditionally require multiple separate products and application steps
2Object-affected harmful factors
If additional noise damping coatings are applied to welded components, then noise and vibration reduction is achieved, but capital investment for equipment and production time increase
Solution Approach 1:
The patent extracts the vibration damping function from separate coating applications and integrates it directly into the adhesive formulation. The viscoelastic polymer matrix provides inherent damping capabilities, eliminating the need for additional damping coating equipment and processes
3Device complexity
If traditional adhesives are used without electrically conductive fillers, then the adhesive matrix remains simple, but the adhesive cannot be welded and requires separate welding operations
Solution Approach 1:
The patent creates a composite adhesive material that combines organic polymers (for adhesion), inorganic fillers (for electrical conductivity and welding), and viscoelastic components (for vibration damping). This composite structure enables welding capability while maintaining adhesive performance, eliminating the need for separate welding operations
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 adhesive composition effectively dampens vibration and noise in welded metal assemblies, providing a cost-effective solution that integrates welding and damping capabilities, reducing the need for additional treatments and improving assembly performance.
Implementation Method 1
the adhesive composition also comprises electrically conductive or metallic particulates dispersed in the matrix
Implementation Method 2
the adhesive composition exhibits either a symmetric or asymmetric peak composite loss factor greater than 0.10 at a frequency of 50 Hz and greater than 0.05 at a frequency of 8000 Hz
Implementation Method 3
a silicone-based adhesive matrix including (i) a silicone adhesive and (ii) a MQ resin
Data Source
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Figure 5~5A
AI summary
Weldable adhesive compositions that dampen noise or vibration are described. In addition, various tape products that include the adhesive compositions are described. Also described are various methods of damping noise or vibration by use of the adhesive compositions and tapes. In addition, vibration damping assemblies utilizing the adhesives are described.