Building Panel Balancing Layer to Reduce Binder Bleeding
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Solution Overview
Problem
Existing building panels, particularly wood-based laminate flooring, face issues with discolouration and inferior connections due to the 'waterfall' effect of binders, leading to increased waste and reduced durability.
Innovation Solution
The design incorporates a balancing layer within the extension of the core, aligning its edges with the core edges to minimize binder bleeding and improve connection, reducing discolouration and enhancing the panel's structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the balancing layer extends beyond the core edges, then the wood veneer coverage is improved, but binder bleeding causes discolouration and inferior connection
Solution Approach 1:
The patent applies different properties to different regions of the balancing layer. The central region (within core extension) uses standard binder composition, while the edge regions (beyond core extension) use modified binder with reduced bleeding propensity or different chemical composition to prevent discolouration while maintaining adhesion where needed.
Solution Approach 2:
The patent pre-treats the balancing layer edges before assembly by applying a sealant or modified binder to the edges that will contact the core. This preliminary action prevents binder bleeding during the pressing and curing processes, eliminating discolouration before it occurs.
2Strength
If binder is applied generously to ensure adhesion, then connection strength is improved, but binder bleeding increases causing discolouration
Solution Approach 1:
The patent modifies binder parameters including viscosity, molecular weight, and chemical composition to reduce bleeding while maintaining adhesion. The binder is formulated with specific rheological properties that prevent excessive flow during pressing, and chemical additives that reduce migration to the veneer surface.
Solution Approach 2:
The patent introduces an intermediary layer or barrier between the binder and the wood veneer surface. This could be a release agent, barrier coating, or intermediate adhesive layer that allows strong bonding to occur while preventing the binder from directly contacting and discolouring the veneer.
3Manufacturing precision
If the balancing layer is positioned within the core extension, then binder bleeding is reduced, but the veneer coverage area is limited
Solution Approach 1:
The patent addresses the coverage limitation by transitioning to multi-dimensional solutions. This includes using veneer拼接 techniques that extend coverage beyond the core edges in controlled ways, or creating layered veneer configurations that provide both edge coverage and surface coverage without requiring the balancing layer to extend beyond the core.
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 configuration reduces discolouration and improves the connection between the wood veneer and core, minimizing waste and increasing the panel's durability and production efficiency.
Implementation Method 1
a first sub-layer arranged on the top surface of the balancing layer, the first sub-layer comprising a first binder
Data Source
AI summary
A building panel including a balancing layer, the balancing layer including a first wood veneer having a grain direction, a first sub-layer is arranged on a top surface of the balancing layer, the first sub-layer including a first binder, a core arranged on the first sub-layer, a surface layer arranged on the core, the surface layer, wherein a top surface of the surface layer is adapted to be a visible surface of the building panel when installed, wherein an extension of the balancing layer in a direction parallel to the grain direction of the first wood veneer is equal or less than an extension of the core in the direction parallel to the grain direction of the first wood veneer, and wherein the balancing layer is arranged within the extension of the core in the direction parallel to the grain direction of the first wood veneer.