Polyurethane Composite Panel for Container Flooring
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Solution Overview
Problem
Current methods for manufacturing container flooring rely heavily on tropical rainforest hardwoods, leading to environmental concerns and complex processes, failing to adequately address the need for sustainable and cost-effective alternatives that meet durability and strength requirements.
Innovation Solution
A polyurethane composite panel comprising two fiber-reinforced material layers with a penetrating polyurethane layer, obtained from a specific polyurethane system reaction, is used, which simplifies the production process and reduces the reliance on tropical hardwoods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If tropical rainforest high-density hardwood is used for container flooring, then the flooring meets high strength and durability requirements, but it causes environmental damage and resource depletion
Solution Approach 1:
The invention changes the material composition parameters by using polyurethane foam with specific density ranges (200-400 kg/m³) and incorporating fiber reinforcements (glass fiber, carbon fiber, or organic fiber) at controlled concentrations. This transforms the material from natural hardwood to synthetic composite while maintaining mechanical strength and eliminating environmental harm associated with deforestation
Solution Approach 2:
The invention creates a composite material system combining polyurethane foam base material with dispersed fiber reinforcements (glass fiber mesh, carbon fiber, or organic fiber). This composite structure provides the necessary strength, stiffness, and durability for container flooring while using sustainable synthetic materials instead of depleting tropical hardwood resources
2Object-affected harmful factors
If medium-density wood and bamboo are used to replace tropical hardwood, then environmental protection is improved, but the manufacturing process becomes complex requiring 19 to 21 layers of glued sheets
Solution Approach 1:
The invention extracts and eliminates the complex multi-layer plywood lamination process by replacing it with a single-layer polyurethane foam structure. The foam is applied directly to the substrate and cured in one operation, removing the need for assembling 19-21 separate glued layers while maintaining environmental benefits
Solution Approach 2:
The invention changes the manufacturing approach by using chemical foaming processes with specific isocyanate-to-polyol ratios and controlled expansion parameters. This single-step foam application and curing process replaces the complex mechanical assembly of multiple wood layers, significantly simplifying production while maintaining environmental sustainability
3Quantity of substance
If larch wood is used instead of tropical hardwood, then dependency on imported resources is reduced, but domestic native tree species are still consumed requiring complex control measures
Solution Approach 1:
The invention uses synthetic polyurethane foam materials that do not deplete natural forest resources, whether imported or domestic. The foam can be produced from abundant petrochemical feedstocks without requiring long-growth-cycle trees, eliminating consumption of both imported tropical hardwood and domestic larch while maintaining flooring performance
4Object-affected harmful factors
If polyurethane foam is used for container flooring, then environmental sustainability is improved and process is simplified, but the material must achieve high strength and rigidity to meet container requirements
Solution Approach 1:
The invention reinforces the polyurethane foam with dispersed fiber materials including glass fiber mesh, carbon fiber, or organic fiber. These fibers form a reinforcement network within the foam matrix, dramatically increasing tensile strength, compressive strength, and rigidity to meet container flooring requirements while maintaining the environmental sustainability of using synthetic rather than natural wood materials
Solution Approach 2:
The invention optimizes the polyurethane foam density to specific ranges (200-400 kg/m³) and controls the fiber reinforcement concentration and distribution. By adjusting these material parameters, the foam-composite achieves the necessary mechanical strength and load-bearing capacity for container flooring applications while maintaining environmental sustainability
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 polyurethane composite panel achieves high strength, rigidity, and durability, meeting container flooring requirements while minimizing the use of tropical hardwoods and simplifying the manufacturing process, thus enhancing productivity and environmental sustainability.
Implementation Method 1
the polyurethane layer is obtained from the reaction of a polyurethane system comprising: (A) di- and/or polyisocyanate(s) and (B) a polyol component
Data Source
Figure 1~2
AI summary
The present invention provides a polyurethane composite panel for container flooring, method for its preparation and use thereof. The polyurethane composite panel for container flooring comprises two fiber-reinforced material layers and a polyurethane layer, wherein the polyurethane layer is applied between the two fiber-reinforced material layers with the polyurethane penetrating into the fiber-reinforced material layers.