Patterned Polymer Resin Damping Layer for Wall Noise Control

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Solution Overview

Problem

Traditional methods for noise control in construction, such as resilient members and viscoelastic materials, are cumbersome, expensive, and have limited effectiveness, particularly in high-rise urban settings where noise reduction is critical.

Innovation Solution

An acoustic damping article featuring a polymer resin with specific thickness and shear modulus, applied in a patterned interlayer configuration between rigid panels, which reduces interlayer stiffness and enhances modal damping factors, allowing for efficient noise reduction with a short drying time.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If traditional resilient members are used for noise control, then noise reduction is achieved, but installation becomes difficult and cost increases

Engineering Contradiction:

Improvenoise reductionVSAvoidinstallation difficulty

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The damping layer is divided into multiple discrete adhesive strips arranged in a pattern rather than continuous coverage. This segmentation simplifies installation by reducing material handling complexity while maintaining effective noise reduction through strategic placement at key stress points between panels.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The adhesive strips are positioned at specific locations where damping is most needed, such as areas of high stress concentration or vibration between rigid panels. This localized approach provides effective noise control where required without the complexity of universal coverage, optimizing both performance and ease of installation.

Inventive Principle:

Principle #3Local quality

2Object-affected harmful factors

If thick insulative members are used for noise control, then noise reduction is limited, but installation complexity and construction steps increase

Engineering Contradiction:

Improvenoise reduction effectivenessVSAvoidinstallation complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The thin adhesive damping strips serve as a simple, easily replaceable damping solution that provides effective noise reduction without the complexity of thick insulative members. These strips can be quickly installed and removed if needed, simplifying construction processes while achieving the required acoustic performance.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Reliability

If viscoelastic material is laminated between panels for modal damping, then damping factor improves, but drying time increases and material cost increases

Engineering Contradiction:

Improvemodal damping factorVSAvoiddrying time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The invention changes the physical parameters of the damping material by using thin adhesive strips with specific shear modulus properties rather than thick viscoelastic layers. This parameter change maintains effective modal damping while dramatically reducing drying time and material cost through the optimized thickness and composition of the adhesive strips.

Inventive Principle:

Principle #35Parameter changes

4Reliability

If viscoelastic material is laminated between panels for modal damping, then damping factor improves, but material cost increases

Engineering Contradiction:

Improvemodal damping factorVSAvoidmaterial cost

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

Instead of applying viscoelastic material across the entire panel surface, the invention uses partial coverage with strategically positioned adhesive strips. This partial action provides sufficient modal damping for effective noise control while significantly reducing the quantity of material required, thereby lowering overall cost.

Inventive Principle:

Principle #16Partial or excessive action

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 provides effective noise reduction with improved modal damping factors and reduced installation complexity and costs, suitable for high-rise urban settings.

Implementation Method 1

a polymer resin with a thickness of at least 10 microns and a shear modulus of not greater than 100 MPa at 1000 Hz and at room temperature

Methodology Applied

Scientific EffectViscoelastic damping: Viscoelasticity

Implementation Method 2

enhances modal damping factors

Methodology Applied

Scientific EffectModal damping: Damping

Data Source

PatentUS9033102B2Optimized pattern of a damping layer for wall, floor, and ceiling constructions

Publication Date: 2015.05.19 SAINT GOBAIN PERFORMANCE PLASTICS CHAINEUX SA

AI summary

An acoustic damping article includes a substrate, wherein the substrate has a surface area S. The acoustic composition further includes a polymer resin. The polymer resin coats partially the surface area with a set of areas. The ratio of the coated areas over the surface area S is less than 1 and the polymer resin coverage is not greater than about 500 g/m2.