Composite Core Panel With Cavities for Acoustic Flooring Stability
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Solution Overview
Problem
Rigid flooring products, such as SPC, suffer from unsatisfactory acoustic performance despite offering advantages in stability and indentation resistance, while flexible options like WPC provide better sound absorption but lack dimensional stability.
Innovation Solution
A panel design featuring a multilayer core with a rigid upper layer and a flexible lower layer, where the lower layer incorporates a plurality of impressed cavities, enhancing sound absorption and reducing weight without compromising rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a solid core SPC panel is used to achieve high dimensional stability and indentation resistance, then the panel rigidity and stability are improved, but the acoustic performance deteriorates
Solution Approach 1:
The core layer is divided into multiple sub-layers with different densities and acoustic properties. The upper core layer has higher density for stability, while the lower core layer has lower density with cavities for sound absorption, segmenting the monolithic structure into functional zones that simultaneously achieve dimensional stability and acoustic performance
Solution Approach 2:
Different regions of the core layer are assigned different material properties: the upper portion uses high-density material for structural stability and indentation resistance, while the lower portion uses low-density material with cavities for sound absorption, creating local quality variations that resolve the contradiction between rigidity and acoustics
2Strength
If the filler or mineral content is increased to improve rigidity and dimensional stability, then the panel stability is improved, but the acoustic performance worsens
Solution Approach 1:
The core layer is segmented into upper and lower portions with different filler contents. The upper portion contains higher filler/mineral content for rigidity, while the lower portion has reduced filler content to create a softer, more acoustically absorptive layer, resolving the trade-off between strength and acoustic performance
Solution Approach 2:
The filler distribution is made non-uniform across the core layer thickness, with localized high-filler zones providing structural strength and localized low-filler zones providing acoustic absorption, allowing both properties to coexist in different regions
3Object-generated harmful factors
If a low density WPC is used to improve acoustical performance, then the sound absorption is improved, but the dimensional stability deteriorates
Solution Approach 1:
The core structure is segmented into two distinct layers: an upper high-density layer for dimensional stability and a lower low-density layer for acoustic absorption, combining the advantages of both material types in a single integrated structure
Solution Approach 2:
The core layer is constructed as a composite of two materials with contrasting properties - a high-density material for stability and a low-density material for acoustics - creating a composite structure that achieves both dimensional stability and acoustic performance simultaneously
4Stability of the object's composition
If grooves are applied to the back surface to improve stability and flexibility, then the panel flexibility is improved, but the acoustic performance remains insufficient
Solution Approach 1:
Instead of surface grooves, the invention creates a porous/cavitary structure within the lower core layer itself, using three-dimensional cavities that provide superior sound absorption compared to surface-level grooves, while maintaining structural integrity through the distributed cavity design
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 panel achieves improved acoustic performance by absorbing sound energy through the flexible lower layer, reducing noise and echo, while maintaining structural integrity and stability, potentially eliminating the need for additional sound dampening layers.
Implementation Method 1
its acoustic performance is unsatisfactory. Its sound performance underperforms with respect to the more flexible and soft LVT and WPC
Data Source
AI summary
The invention relates to a panel, such as a floor panel, a wall panel or a ceiling panel, in particular a decorative panel and to a method for producing such panel. The panel according to the present invention comprises a core layer comprising a first composite material and a second composite material which have different material characteristics. The panel is further provided with a plurality of cavities.