Wood Floor Panel Edge Strength via Post-Crosslinking
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Solution Overview
Problem
Existing methods for manufacturing wood-based floor panels struggle to reduce material thickness while maintaining strength, particularly in the edge areas where profiles are connected, which affects the ease of production, handling, and moisture resistance.
Innovation Solution
The use of a post-crosslinking substance is applied to the edge areas of wood-based panels, increasing their strength and water resistance by chemically reacting with the panel components, such as polyurethane prepolymers, isocyanate, or epoxy resins, to enhance the transverse tensile strength and reduce bulk density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the material thickness of the wood-based panel is reduced, then the ease of transport and handling is improved, but the strength of the profiles to absorb loads deteriorates
Solution Approach 1:
The patent applies local quality by treating only the edge areas of the wood-based panel with post-crosslinking substances, while the inner area maintains lower density. This creates localized high-strength zones in the edge areas where profiles are introduced, allowing the overall panel thickness and weight to be reduced while maintaining profile strength where needed.
Solution Approach 2:
The patent uses composite materials by combining wood-based panel material with post-crosslinking substances (such as polyurethane prepolymers, isocyanates, or epoxy resins) in the edge areas. This creates a composite structure where the post-crosslinked edge areas provide enhanced strength to support profiles, while the lower-density inner areas reduce overall weight.
2Quantity of substance
If the bulk density of the wood-based panel is reduced, then the ease of transport and handling is improved, but the strength of the edge area deteriorates
Solution Approach 1:
The patent implements local quality by creating a density gradient within the panel: the inner area has reduced bulk density for weight reduction, while the edge areas are treated with post-crosslinking substances to maintain high strength. This spatial differentiation allows simultaneous optimization of both weight and strength properties in different regions.
Solution Approach 2:
The patent applies parameter changes by modifying the chemical and physical parameters of the edge areas through post-crosslinking. The post-crosslinking substances alter the molecular structure and bonding in the edge areas, increasing strength without significantly affecting the bulk density of the overall panel.
3Strength
If aluminum strips are embedded in the profiles, then the strength to absorb joining forces is improved, but the complexity of production increases
Solution Approach 1:
The patent extracts the aluminum strips from the profile structure and replaces them with post-crosslinked edge areas of the wood-based panel itself. The edge areas are treated with post-crosslinking substances during panel production, creating integrated high-strength zones that eliminate the need for separate aluminum reinforcement elements and their associated embedding processes.
Solution Approach 2:
The patent merges the profile-strengthening function with the panel structure by creating post-crosslinked edge areas that are integral to the panel. This combines what were previously separate components (panel and aluminum strips) into a unified structure, simplifying production by eliminating the aluminum embedding step.
4Object-affected harmful factors
If impregnating agents are applied to edges, then the resistance to moisture penetration is improved, but the bulk density cannot be reduced and production remains complex
Solution Approach 1:
The patent applies parameter changes by using post-crosslinking substances that simultaneously achieve multiple objectives: they create water repellency through chemical crosslinking and significantly reduce bulk density by replacing heavy aluminum strips and traditional impregnating agents with lighter molecular structures in the edge areas.
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
This approach allows for the production of lighter, easier-to-handle floor panels with improved mechanical strength and reduced moisture absorption, enabling faster and more cost-effective manufacturing while maintaining the integrity of click connections.
Implementation Method 1
the edge area is stabilized with a post-crosslinking substance over the full thickness of the wood-based panel
Implementation Method 2
the post-crosslinking substance polymerizes or reacts with components of the wood-based panel, for example with wood chips
Implementation Method 3
the post-crosslinking substance, which increases the strength of the edge area, generally also has a water-repellent effect, so that swelling in the edge area is avoided
Data Source
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AI summary
The timber material plates (10.1,10.2) have a circular boundary area and an internal area surrounded by the boundary area. The firmness of the boundary area is increased in relation to the internal area. A cross linked substance is made from an isocyanate polymer, a polyurethane polymer or an epoxy resin. The boundary area is stabilized for the increase of the firmness over a full thickness expansion (D) of the timber material plate with the cross linked substance. Independent claims are included for the following: (1) a floor panel with a connecting profile; and (2) a method for manufacturing a timber material plate.