Wood Panel Microstructure for Soft Haptics
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Solution Overview
Problem
Existing wood-based panels for furniture and flooring lack a soft, tactile surface while maintaining cost-effectiveness and durability, as they often suffer from tension issues due to impregnated paper shrinkage and require extensive material coverage for decor and protection.
Innovation Solution
A wood-based panel with a partial, irregularly distributed microstructure surface layer created using a gravure printing process, where a paint-like material application covers 10-50% of the surface, forming elevations with a peak-to-valley height of 2-30 μm, mimicking a soft surface and incorporating abrasion-resistant particles for enhanced durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If impregnated paper is pressed onto panel surfaces to apply decor, then the desired decorative appearance is achieved, but the panels bend due to tension generated by paper shrinkage
Solution Approach 1:
The patent removes the impregnated paper layer entirely and replaces it with direct liquid coating application. This extracts the harmful shrinkage tension source while maintaining the decorative function through liquid paint applications that cure without generating significant tension.
Solution Approach 2:
The patent changes the physical state of the coating material from solid impregnated paper to liquid coating agents. This parameter change allows the coating to be applied uniformly without the shrinkage constraints of paper, eliminating the bending problem while achieving the desired decorative effect.
2Ease of manufacture
If liquid coating agents are applied to fiberboards with decor printing, then the production process is simplified, but the surface lacks soft haptic characteristics
Solution Approach 1:
The patent applies coating agents with spatially varying application quantities to create localized microstructures on the surface. This local quality variation produces soft haptic characteristics in specific areas while maintaining the overall simplicity of the liquid coating process.
Solution Approach 2:
The patent transitions from two-dimensional flat coating to three-dimensional microstructured surfaces by creating peak-to-valley height variations. This dimensional change adds haptic softness to the otherwise simple liquid coating process.
3Reliability
If full surface coverage with coating material is applied, then complete protection and uniform appearance are achieved, but production costs increase
Solution Approach 1:
The patent applies coating material partially rather than covering the entire surface uniformly. The coating is concentrated in specific patterns with 10-50% surface coverage, providing sufficient protection and aesthetic effect while reducing material consumption and production costs.
4Reliability
If multiple layers of paint with different properties are applied, then favorable wear properties are achieved, but the production process becomes more complex
Solution Approach 1:
The patent applies different coating agents with varying properties to different local areas of the surface. This local differentiation achieves comprehensive wear protection and aesthetic requirements without requiring multiple sequential coating layers, simplifying the overall process.
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 method produces panels with a soft, haptic impression akin to oiled solid wood, reducing production costs and enhancing abrasion resistance, while maintaining the appearance of real wood through a three-dimensional pore structure aligned with wood grain, effectively addressing the need for a cost-effective, durable, and aesthetically pleasing solution.
Implementation Method 1
a paint-like material application is printed onto the surface layer
Implementation Method 2
forming a microstructure which has a peak-to-valley height in the range from 2 μm to 30 μm
Implementation Method 3
after curing forms a microstructure
Data Source
Figure 2A~2C
Figure 3~5
AI summary
The component has a material layer (2) partially covering a surface layer i.e. transparent smooth sealing layer, and forming a microstructure that has surface roughness in a range of 6.5 to 15 micrometers according to DIN 4768. The material layer covers 10 to 50 percent of a surface of the surface layer, where regions defined by the material layer are irregularly limited and are arranged on the surface layer in an irregularly distributed manner. A pore structure formed from paint is applied on the material layer. An independent claim is also included for a method for producing a wooden composite component.