Floor Panel Reinforcement Layer for Impact and Acoustic Performance
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Solution Overview
Problem
Existing floor panels suffer from inferior indentation and impact resistance, poor acoustic performance, and visual defects due to dimensional instability caused by differences in thermal and humidity responses between the decorative top layer and the core layer, especially when combined with flexible acoustic layers.
Innovation Solution
A panel with a layered structure comprising a decorative top layer and a core layer of different chemical compositions, featuring a high-strength polymer foam reinforcement layer with a modulus of elasticity above 2MPa, positioned between the top and core layers, which enhances impact resistance and acoustic performance while maintaining dimensional stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a flexible acoustic layer (modulus of elasticity 0.2-1.4MPa) is added to the back of the flooring product to improve sound transmission, then acoustic performance is improved, but the layer becomes subject to dimensional instability stresses when temperature and humidity fluctuate, causing gapping and visual defects
Solution Approach 1:
The patent changes the key parameter of the acoustic layer from low modulus of elasticity (0.2-1.4MPa) to high modulus of elasticity (at least 2MPa). This parameter change transforms the acoustic layer from a flexible material that deforms under dimensional stress to a rigid material that maintains dimensional stability while still providing sound absorption and impact resistance.
Solution Approach 2:
The patent creates a composite structure where a rigid reinforcement layer (high modulus material) is combined with acoustic functionality. The reinforcement layer acts as both a dimensional stabilizer and an acoustic element, integrating multiple functions into a single composite component that prevents gapping while maintaining sound transmission performance.
2Ease of manufacture
If a vinyl top layer is directly glued to the mineral core to simplify construction, then ease of manufacture is improved, but acoustic performance deteriorates to around 17dB Delta Lw
Solution Approach 1:
The patent introduces a reinforcement layer as an intermediary component between the decorative top layer and the core layer. This intermediate layer serves multiple functions: it provides acoustic absorption to improve sound transmission, reinforces the structure to prevent indentation, and maintains dimensional stability. The intermediary layer decouples the direct bonding between top layer and core, allowing each layer to perform its primary function without compromising the other.
3Weight of moving object
If a low density core is used to reduce weight, then weight is reduced, but the flexible top layer becomes unable to resist heavy objects and impacts
Solution Approach 1:
The patent creates a composite structure combining a lightweight core with a rigid reinforcement layer. The core provides low weight while the reinforcement layer provides high strength and impact resistance. The reinforcement layer acts as a protective shield that absorbs and distributes impact forces, preventing the lightweight core from being compressed or damaged by heavy objects.
Solution Approach 2:
The reinforcement layer serves as a pre-positioned protective barrier that absorbs impact energy before it reaches the core layer. By placing this high-strength layer between the top surface and the core, the system provides beforehand cushioning that prevents indentation and damage to the lightweight core structure.
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 absorbs impact, improves sound transmission, and prevents excessive deformation, ensuring the panel remains dimensionally stable and free of visible gaps or defects under temperature and humidity fluctuations.
Implementation Method 1
a reinforcement layer, positioned between the top layer and the core layer, and having a modulus of elasticity of at least 2MPa when tested according to ASTM D412
Implementation Method 2
improves sound transmission
Data Source
AI summary
Panel suitable for assembling a floor covering by interconnecting a plurality of said panels with each other, wherein the panel has a substantially planar top side, and a substantially planar bottom side, at least four substantially linear side edges comprising at least one pair of opposite side edges, the panel having a layered structure which comprises a decorative top layer and a core layer wherein the decorative top layer and the core layer have a different chemical composition, wherein a reinforcement layer is positioned between the top layer and the core layer, and having a modulus of elasticity of at least 2Mpa.