Dry Powder Surface Layer for Wear-Resistant Building Panels
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Solution Overview
Problem
Conventional methods for producing pale or intensely colored wear-resistant surface layers for building panels, such as laminate flooring, face limitations due to the natural resins in wood fibers, which affect color uniformity and require high pigment loadings that can lead to pigment bleed and increased costs.
Innovation Solution
A dry powder layer comprising refined fibers, binder, and wear-resistant particles, such as aluminum oxide, is applied to a carrier and cured with heat and pressure to create a cost-effective, wear-resistant surface layer with improved processability and stain resistance, allowing for thicker layers and enhanced durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high pigment loading is used to achieve pale or intense colors, then color intensity is improved, but pigment bleed and manufacturing costs increase
Solution Approach 1:
A sizing agent is applied as an intermediary layer between the decorative paper and the overlay. This sizing agent prevents pigment from the decorative paper from bleeding into the overlay during the lamination process, thereby maintaining color intensity without requiring excessive pigment loading.
Solution Approach 2:
The decorative paper is pre-treated with a sizing agent before lamination with the overlay. This preliminary action of applying the sizing agent ensures that pigment remains confined to the decorative paper layer, preventing bleed into the overlay during subsequent processing.
2Strength
If natural resins are present in wood fibers, then fiber strength is maintained, but color uniformity deteriorates
Solution Approach 1:
The sizing agent acts as an intermediary barrier that prevents interaction between the natural resins in wood fibers and the pigment, thereby maintaining color uniformity while preserving the structural integrity and strength of the wood fibers.
3Strength
If transparent overlay with aluminium oxide particles is used, then wear resistance is improved, but transparency is reduced
Solution Approach 1:
The overlay is designed with local quality variations: it contains aluminium oxide particles concentrated in specific regions to provide wear resistance, while maintaining sufficient transparency in areas where visibility of the decorative layer is desired. The particle distribution and size are optimized to balance these competing requirements.
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 enables the production of pale and colorful wear-resistant surface layers with improved durability and processability, reducing costs and pigment-related issues while maintaining high wear resistance and aesthetic qualities.
Implementation Method 1
cured with heat and pressure to create a cost-effective, wear-resistant surface layer
Implementation Method 2
A dry powder layer comprising refined fibers, binder, and wear-resistant particles, such as aluminum oxide
Data Source
AI summary
A building panel including a carrier, and a surface layer arranged on the carrier, wherein the surface layer includes a mix of refined fibres and a resin, wherein the weight ratio of resin to refined fibres is higher than about 120%, wherein the surface layer is applied as a dry powder layer.