Decorative Panel Coating Relief for Natural Look and Feel

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Solution Overview

Problem

Existing decorative panels, particularly those based on synthetic materials, often have a synthetic look and feel, lacking a natural appearance and tactile quality.

Innovation Solution

Incorporating a randomized relief on the top coating, defined by a curing process, which comprises a plurality of peaks and valleys with specific dimensions, providing a less glossy and softer surface texture.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If a smooth top coating surface is used, then the panel has a glossy appearance and easier manufacturing, but the panel has a synthetic look and feel lacking natural appearance

Engineering Contradiction:
Improvesurface textureVSAvoidmanufacturing complexity
Core Design Contradiction:
ShapeVSEase of manufacture

Solution Approach 1:

The patent applies parameter changes by modifying the surface topology of the top coating through UV curing processes that create randomized relief patterns. The surface is transformed from a smooth state to one with controlled peaks and valleys at specific dimensional ranges (1-25 μm peak-to-peak distance, 0.5-2.5 μm amplitude), changing the physical parameters to achieve a natural appearance while maintaining manufacturing efficiency through automated curing processes.

Inventive Principle:
Principle #35Parameter changes

2Illumination intensity

If matting agents are added to reduce gloss, then the panel has a less glossy appearance, but the panel composition becomes more complex and durability may be compromised

Engineering Contradiction:
Improvegloss levelVSAvoidcoating composition complexity
Core Design Contradiction:
Illumination intensityVSDevice complexity

Solution Approach 1:

The patent replaces the chemical approach (adding matting agents) with a physical approach (creating surface relief through UV curing). Instead of modifying the coating composition with additives, the solution uses photopolymerization processes to create a three-dimensional randomized relief structure that naturally reduces gloss through light scattering, eliminating the need for matting agents and their associated complexity.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Shape

If a randomized relief is created on the top coating, then the panel has a more natural look and feel, but the manufacturing process becomes more complex

Engineering Contradiction:
Improvesurface realismVSAvoidcuring process complexity
Core Design Contradiction:
ShapeVSDevice complexity

Solution Approach 1:

The patent applies self-service by designing a UV curing process that automatically generates randomized relief patterns without requiring external intervention or complex control systems. The photopolymerization process inherently creates the desired surface topology through controlled curing conditions, allowing the system to self-organize into the target structure and eliminating the need for additional post-processing or complex manufacturing equipment.

Inventive Principle:
Principle #25Self-service

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 randomized relief enhances the panels' natural appearance and feel, offering a higher quality look and improved walking comfort without the need for matting agents, while maintaining durability and wear resistance.

Implementation Method 1

the relief may be completely defined by a curing process

Methodology Applied
Scientific EffectCuring process: Photopolymerisation

Data Source

PatentEP4400326B1Decorative panel and method for manufacturing decorative panels
Publication Date: 2026.02.04 UNILIN BVBA
  • EP4400326B1 patent drawingFigure 1~3
  • EP4400326B1 patent drawingFigure 4~5
  • EP4400326B1 patent drawingFigure 6

AI summary

Decorative panel comprising a substrate (2), a top layer (3) and a top coating (4), wherein said top layer is located between said substrate and said top coating, and wherein the uppermost surface of said top coating comprises a randomized relief (5).