Vertically Lapped Fibrous Underlayment for Thin Acoustic Flooring
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Solution Overview
Problem
Existing flooring systems are labor-intensive, add undesirable thickness, and fail to adequately reduce sound transmission, flooring deformation, and vibration-induced noise, particularly under heavy loads.
Innovation Solution
A multi-layer fibrous structure comprising vertically lapped layers and facing layers, made from materials like spunbond and meltblown nonwoven materials, providing improved acoustic performance and durability, with a thickness of 5 mm or less.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional flooring assemblies (foams, glass fiber insulation, polymeric mats, liquid adhesives) are used to reduce sound transmission, then acoustic performance is improved, but installation becomes time-consuming and labor-intensive
Solution Approach 1:
The patent combines multiple traditional flooring assembly components (insulation, damping, adhesive layers) into a single integrated fibrous structure. This multi-functional underlayment is installed as one continuous sheet, eliminating the need for separate installation of foams, glass fiber, and adhesives, thereby reducing installation time and labor while maintaining acoustic performance
Solution Approach 2:
The invention uses composite fibrous materials that integrate different functional properties within a single structure. The fibrous composition combines insulation, sound damping, and structural support in one material system, replacing multiple separate products and simplifying the installation process
2Object-affected harmful factors
If traditional flooring assemblies are used to reduce sound transmission, then acoustic performance is improved, but added thickness becomes undesirable
Solution Approach 1:
The patent optimizes the thickness parameter of the fibrous structure to achieve effective sound transmission reduction without excessive added thickness. By controlling the density, fiber orientation, and compression characteristics of the fibrous material, the invention provides acoustic performance with minimal increase in floor thickness, making it suitable for spaces where thickness is a constraint
3Ease of operation
If conventional flooring materials are used, then installation is simpler, but flooring deformation and cracking occur under extended use and heavy loads
Solution Approach 1:
The fibrous structure provides dynamic support and cushioning that adapts to applied loads. The compressed fibrous material distributes heavy static and dynamic loads across a larger area, preventing point-load damage and cracking while maintaining ease of installation as a continuous sheet
Solution Approach 2:
The fibrous underlayment provides beforehand cushioning and shock absorption that protects the flooring surface from deformation and cracking before damage occurs. The compressible fibrous structure absorbs impact energies from heavy objects and foot traffic, preventing stress concentration that would otherwise cause cracking
4Object-affected harmful factors
If traditional damping materials are used, then noise reduction is achieved, but fatigue stress and strain accumulate inside flooring sheets
Solution Approach 1:
The fibrous structure acts as an intermediary layer between the flooring surface and the subfloor, absorbing and dissipating vibration energies before they can cause fatigue stress in the flooring sheets. This mediator function reduces noise radiation while protecting the flooring structure from cumulative stress damage
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 fibrous structure achieves enhanced below-room and in-room acoustic performance, prevents flooring cracking, and maintains loft under heavy loads, offering improved durability and noise reduction.
Implementation Method 1
the combination of layers and materials thereof yield unique properties, such as improved below-room noise reduction
Implementation Method 2
provide damping and/or reduce audible noise from the floor
Implementation Method 3
reduce tiles vibrating or noise radiating as a result of the vibration
Data Source
AI summary
A fibrous structure having one or more vertically lapped layers having a first surface and a second surface and a facing layer secured to the first surface of the vertically lapped layer. The fibrous structure is adapted to be used in a flooring assembly. The fibrous structure may include a mesh and/or a backing layer on the second surface of a vertically lapped layer. The fibrous structure exhibits improved performance in below room testing and/or in-room testing as compared with traditional materials of the same thickness.