Thin Veneer Floor Panel Structure for Impact and Moisture Resistance
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Solution Overview
Problem
Veneer parquet panels are susceptible to impact, scratches, and moisture penetration due to their insufficient mechanical properties, and existing methods for enhancing the top layer with thermosetting resin can lead to delamination.
Innovation Solution
A floor panel design with a high-density substrate and a thin wood veneer layer bonded by a thermosetting resin, combined with a transparent or translucent surface material, and optionally a backing layer, to enhance impact resistance and moisture protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a thin wood veneer layer (less than 2mm) is used for veneer parquet, then the panel achieves a more refined appearance and reduced thickness, but the panel becomes susceptible to impact, scratches, and moisture penetration due to insufficient mechanical properties
Solution Approach 1:
The patent applies composite materials by combining a thin wood veneer layer with a high-density substrate (HDF or MDF with density >750 kg/m³) and an intermediate resin layer. This composite structure allows the thin veneer to maintain its aesthetic advantages while the high-density substrate provides the necessary mechanical strength and impact resistance that the thin veneer alone cannot provide.
Solution Approach 2:
The patent applies local quality by creating a layered structure where each layer has specific local properties: the thin veneer provides aesthetic surface quality, the intermediate resin layer provides adhesive strength and flexibility, and the high-density substrate provides mechanical strength and impact resistance. This local differentiation of material properties throughout the panel thickness resolves the contradiction between thin veneer and impact resistance.
2Strength
If a high-density substrate (density >750 kg/m³) is used, then the panel achieves improved impact resistance and mechanical properties, but the panel weight increases
Solution Approach 1:
The patent applies parameter changes by optimizing the substrate density parameter to be greater than 750 kg/m³ (preferably 800-900 kg/m³ for HDF). This specific density range provides sufficient mechanical strength and impact resistance while avoiding excessive weight increase. The intermediate resin layer also contributes by providing adhesive strength that allows effective stress transfer, reducing the need for excessive substrate thickness or density.
Solution Approach 2:
The composite structure distributes mechanical loads across multiple layers, allowing the use of a moderately dense substrate rather than an extremely dense one. The intermediate resin layer and thin veneer contribute to the overall mechanical performance, enabling weight optimization while maintaining impact resistance.
3Strength
If an intermediate resin layer is used to bond the veneer to the substrate, then the panel achieves improved adhesion and impact resistance, but the manufacturing process becomes more complex
Solution Approach 1:
The patent applies the intermediary principle by introducing a resin layer (preferably polyurethane resin or melamine resin) between the wood veneer and the high-density substrate. This intermediate layer acts as a mediator that provides strong adhesion between the two materials, distributes mechanical stresses, and prevents direct contact that could cause delamination. The resin layer's flexibility helps absorb impact forces, improving overall panel durability.
Solution Approach 2:
The patent applies parameter changes by selecting resin layers with specific thickness parameters (typically 0.1-0.5mm) and specific material properties (flexibility, adhesive strength). These optimized parameters allow the resin layer to provide sufficient adhesion and impact resistance while minimizing the added complexity and thickness. The standardized parameter ranges facilitate streamlined manufacturing processes.
4Strength
If the veneer layer is pressed onto the substrate with high pressure, then the panel achieves improved bonding strength, but the veneer may delaminate from the substrate
Solution Approach 1:
The intermediate resin layer serves as a stress-distributing intermediary that prevents concentration of localized pressures during the bonding process. This distributed pressure application prevents veneer delamination while still achieving strong bonding. The resin's viscoelastic properties allow it to accommodate pressure variations without causing damage to the thin veneer layer.
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 design provides improved impact resistance, sound absorption, and moisture resistance, while maintaining a durable and visually appealing surface.
Implementation Method 1
said decorative layer is provided on the substrate by means of a layer on the basis of thermosetting resin situated between the substrate and the decorative layer
Implementation Method 2
The underlying substrate with high density unabatedly functions as a buffer for impression deformations or perforations exerted on the thin veneer
Implementation Method 3
on its upper side it still can be treated further, for example, for exerting an influence on the appearance thereof and/or for improving the surface quality thereof
Data Source
AI summary
A floor panel has a substrate and a decorative layer of wood veneer provided thereon having a thickness of 1 millimeter or less. The substrate has an average density of more than 750 kilograms per cubic meter. The floor panel is rectangular and oblong and comprises a pair of opposite short edges and a pair of opposite long edges. The floor panel, on at least said two opposite long edges, is provided with coupling means allowing that two of such floor panels can be coupled to each other in a vertical direction perpendicular to the plane of the coupled panels and in a horizontal direction in this plane and perpendicular to the respective edge. The wood veneer and/or the substrate immediately underneath the wood veneer is treated at least at the short edges with a fluoro copolymer or a polymeric methylene diphenyl diisocyanate.