Constrained-Layer Vibration Damping Material With Built-In Fireproofing
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Solution Overview
Problem
Conventional paint-based vibration damping methods in ships are labor-intensive, prone to poor finishes, and increase room and piping space constraints, while also requiring additional fireproofing treatments.
Innovation Solution
A vibration damper comprising a constrained layer of inorganic material and a resin layer with a controlled organic mass, where the resin layer is adhered to a steel plate, using a chlorine-containing thermoplastic resin and chlorinated paraffin, providing excellent vibration damping and fireproof performance without the need for paint application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coating-type vibration damper is applied by hand painting, then vibration damping performance is achieved, but the working time increases and working cost increases
Solution Approach 1:
The patent replaces the mechanical hand painting process with a spray application system. The vibration damper composition is applied as a spray coating, which significantly reduces the manual labor time and working cost while maintaining the vibration damping performance through controlled deposition of the material.
Solution Approach 2:
The patent changes the application method from manual brushing to spray deposition, which alters the deposition parameters such as coating thickness control, coverage uniformity, and application speed. This parameter change enables faster application while achieving the required vibration damping properties.
2Reliability
If additional fireproof treatment is applied to the vibration damper surface, then fireproof performance is improved, but the device complexity increases
Solution Approach 1:
The patent combines the fireproofing function with the vibration damping composition itself. By incorporating fireproofing agents directly into the vibration damper material, a single layered structure performs both vibration damping and fireproofing functions, eliminating the need for separate fireproof treatment layers and reducing overall structural complexity.
Solution Approach 2:
The vibration damper composition is designed to serve multiple functions simultaneously: it provides vibration damping through its viscoelastic properties and fireproofing through incorporated fire-resistant agents. This multi-functional design eliminates the need for separate treatment steps and simplifies the overall structure.
3Reliability
If paint is applied by hand working, then coating coverage is achieved, but the finish quality becomes poor depending on worker skill
Solution Approach 1:
The patent replaces manual painting with a spray application system that provides consistent, uniform coating deposition. The spray method eliminates the variability introduced by different worker skills and ensures uniform finish quality across all surfaces, while maintaining complete coating coverage.
4Reliability
If the coating film thickness is increased to ensure coverage, then vibration damping performance is improved, but the room space and piping space are decreased
Solution Approach 1:
The patent optimizes the coating thickness parameter to achieve the minimum required thickness for effective vibration damping. By using spray application, the coating can be applied at controlled, thinner layers that are sufficient for performance while minimizing the space occupied, thereby preserving room and piping space.
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 solution achieves superior vibration damping and fireproof performance, simplifying the coating process, improving finish quality, and reducing space constraints, while meeting international fire safety standards without the use of paint.
Implementation Method 1
an organic mass of the resin layer is 0.6 kg/m2 or less
Implementation Method 2
the vibration damper is adhered at the resin layer side thereof to the floor steel plate as an adherend
Implementation Method 3
a vibration damper comprising a constrained layer and a resin layer
Data Source
Figure 1~2
AI summary
The present invention provides a vibration damper comprising a constrained layer and a resin layer, wherein the constrained layer is constituted of an inorganic material, an organic mass of the resin layer is 1.0 kg/m2 or less, and the resin layer is constituted of a resin composition comprising 100 parts by weight of a chlorine-containing thermoplastic resin having a chlorine content of 20 to 70 wt% and a weight average molecular weight of 400,000 or more, and 200 to 1,000 parts by weight of a chlorinated paraffin having an average carbon atom number of 12 to 50 and a degree of chlorination of 30 to 75 wt%.