Viscoelastic Acoustic Interlayer for Sound and Moisture Management
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Solution Overview
Problem
There is a need for a breathable acoustic interlayer that can effectively reduce unwanted sound and vibration in construction, particularly between common walls and subfloors, while also serving as a moisture barrier and improving sound transmission and impact insulation.
Innovation Solution
The acoustic interlayer consists of a sandwich structure with a viscoelastic membrane layer sandwiched between two carrier layers, which can be made of various materials such as polyethylene, nonwoven, paper, or metal foil, and includes a non-skid surface treatment, allowing for breathability and attachment to construction materials like sheetrock or plywood to enhance sound insulation and moisture management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a traditional acoustic interlayer is used to reduce sound transmission, then sound insulation is improved, but breathability and moisture barrier function deteriorate
Solution Approach 1:
The patent applies local quality by creating a viscoelastic membrane with specific local properties (damping characteristics) that are optimized for acoustic performance, while the overall membrane structure maintains breathability through its configuration and attachment method. The viscoelastic layer is positioned specifically to address sound transmission issues without compromising the breathable nature of the interlayer.
Solution Approach 2:
The patent uses composite materials by combining a viscoelastic membrane layer with carrier layers (such as polyethylene, nonwoven, paper, or metal foil) to create an acoustic interlayer that achieves both sound insulation and breathability. This composite structure allows the viscoelastic layer to provide acoustic damping while the carrier layers maintain structural integrity and moisture barrier properties.
2Object-affected harmful factors
If a viscoelastic membrane layer is added to improve acoustic performance, then sound transmission and vibration are reduced, but device complexity increases
Solution Approach 1:
The patent merges the acoustic interlayer with existing construction materials by attaching the viscoelastic membrane to carrier layers that can be integrated with sheetrock, plywood, or other building materials. This merging approach reduces device complexity by combining multiple functions (acoustic damping, moisture barrier, structural support) into a single integrated component rather than requiring separate elements.
Solution Approach 2:
The patent achieves multi-functionality by designing the acoustic interlayer to simultaneously provide sound transmission class improvement, impact insulation class enhancement, moisture barrier protection, and structural attachment capability. The viscoelastic membrane with carrier layers serves multiple purposes, reducing the need for additional separate components and thereby reducing overall device complexity.
3Adaptability or versatility
If the interlayer is designed to be breathable for moisture management, then moisture barrier function is improved, but sound insulation effectiveness deteriorates
Solution Approach 1:
The patent applies local quality by positioning the viscoelastic membrane layer specifically to address acoustic issues, while the carrier layers and attachment system maintain the breathable moisture barrier function. The viscoelastic layer is configured to provide acoustic damping without creating a seal that would compromise breathability, allowing local acoustic treatment without global compromise to moisture management.
Solution Approach 2:
The patent uses composite materials to achieve both breathability and sound insulation by combining viscoelastic damping materials with breathable carrier layers (polyethylene, nonwoven, paper, or metal foil). This composite structure allows the material to provide acoustic performance while maintaining the moisture vapor transmission properties needed for breathability.
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 effectively reduces sound transmission and structure-borne vibrations, improves impact insulation, and acts as a breathable moisture barrier, enhancing the overall acoustic performance and durability of building structures.
Implementation Method 1
a viscoelastic membrane layer 14
Implementation Method 2
The acoustic interlayer can be used to help keep unwanted sound or vibration from entering the interior of the building
Data Source
AI summary
An acoustic interlayer that includes a viscoelastic membrane layer, and at least one carrier material. The acoustic interlayer is easily installed at a location between two constraining layers, such as flooring, sheetrock, or the like.