Foam panel
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Solution Overview
Problem
Conventional panels, such as those made from chipboard and high-density fiberboards, are sensitive to water, lack mechanical strength, and are heavy, making them unsuitable for applications requiring high durability and workability, especially in flooring where they are prone to abrasion and not cost-effective.
Innovation Solution
A foam panel with a polyurethane foam backing and a multi-layer composite sheet comprising a core layer and decorative layer, where the foam carrier has a flexural strength greater than 2.0 MPa, providing improved water resistance, reduced weight, and enhanced mechanical properties, along with excellent workability and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional substrates like chipboard or high-density fiberboard are used, then the panel structure is simple and easy to manufacture, but the panels exhibit high sensitivity to water, high weight, and insufficient mechanical strength
Solution Approach 1:
The patent employs a composite structure combining polyurethane foam core with high-density fiberboard layers. The foam provides lightweight properties and water resistance, while the HDF layers contribute mechanical strength and structural integrity. This composite approach resolves the contradiction by integrating materials with complementary properties rather than relying on a single substrate material.
Solution Approach 2:
Different regions of the panel are assigned different materials optimized for their specific functions: the foam core handles water resistance and weight reduction, while the HDF surface layers provide abrasion resistance and structural support. This local differentiation allows each material to excel at its designated property without compromising overall panel performance.
2Strength
If conventional substrates like chipboard or high-density fiberboard are used, then the panel structure is simple and easy to manufacture, but the panels lack mechanical strength and are prone to abrasion
Solution Approach 1:
The combination of foam core with HDF layers creates a structurally superior panel that achieves high mechanical strength and abrasion resistance. The HDF layers provide a hard, durable surface while the foam core adds structural rigidity. This composite construction resolves the strength-manufacturability contradiction by using layered materials that enhance performance without requiring complex manufacturing processes.
3Ease of operation
If wood-based substrates are used, then the panel is easy to work with and install, but the panel swells by 8% or more when exposed to water, making it not water-resistant
Solution Approach 1:
The foam core material is specifically selected for its hydrophobic properties and dimensional stability when exposed to moisture. By placing this water-resistant material in the core region that would otherwise be susceptible to swelling, the patent protects the panel structure from water damage while maintaining the workability of the outer wood-based layers for installation.
4Strength
If high-density fiberboard is used to improve mechanical properties, then the panel achieves higher strength, but the density increases to 850-950 kg/m3, making it heavier and more expensive
Solution Approach 1:
High-density fiberboard is applied only as thin surface layers (typically 2-4 mm) where mechanical strength and abrasion resistance are most needed. The bulk of the panel volume consists of lightweight foam material. This localized use of dense material provides necessary structural properties at the surface while the foam core maintains overall panel lightness, resolving the strength-weight contradiction.
Solution Approach 2:
The composite construction combines the high strength-to-weight ratio advantages of both materials: HDF provides a hard, durable surface with high mechanical properties, while the foam core contributes structural rigidity with minimal weight. This composite approach achieves the mechanical strength of dense materials without the corresponding weight penalty throughout the entire panel volume.
Data Source
AI summary
Disclosed is a foam panel comprising a support and at least one multilayer composite board that adheres to the support. The multilayer composite board has a) a core layer and b) a decorative layer. The support comprises a polyurethane foam that has a bending strength (DIN EN 12089) exceeding 2.0 MPa.