Polyurethane Pavers with Shock Absorption and Natural Aesthetics
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Solution Overview
Problem
Current artificial pavers lack aesthetically pleasing natural irregularity and effective shock absorption, making them costly and unsafe for surfaces, particularly for older adults who are prone to falls, which can lead to injuries and increased risk of further falls due to reduced mobility.
Innovation Solution
The development of artificial pavers made from a two-component polyurethane material that is softer than stone or concrete, with higher shock absorption properties, which can be molded into various shapes and designs to mimic natural or manufactured pavers, and includes a method of pouring and curing the polyurethane in minutes at room temperature, allowing for efficient production and installation without adhesives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If artificial pavers are made from traditional materials (concrete, stone, brick), then they provide durability and structural strength, but they lack shock absorption properties and can cause injuries during falls
Solution Approach 1:
The patent uses composite materials combining polyurethane resin with rubber particles or foam materials to create pavers that simultaneously provide structural strength and shock absorption. The composite structure allows the material to maintain durability while reducing impact forces during falls, directly resolving the contradiction between strength and shock absorption.
Solution Approach 2:
The patent modifies the physical and chemical parameters of the paver material by incorporating rubber particles (5-50% by weight) or foam structures into the polyurethane matrix. This parameter change transforms the material from rigid and shock-prone to flexible and shock-absorbing, while maintaining sufficient structural integrity for load-bearing applications.
2Ease of manufacture
If natural paving objects are used to achieve aesthetic natural irregularity, then the appearance is aesthetically pleasing, but the work is labor intensive and expensive requiring skilled stonemasons
Solution Approach 1:
The patent uses mold technology to copy the appearance characteristics of natural stone, including irregular shapes, textures, and patterns. By creating molds from natural stone samples and using them to form artificial pavers, the invention replicates the aesthetic qualities of natural materials without requiring skilled stonemasons, significantly reducing labor costs while maintaining visual appeal.
Solution Approach 2:
The patent controls the degree of irregularity through mold design parameters, allowing adjustment between completely regular and highly irregular shapes. This parameter control enables mass production of pavers with natural-looking variations without the labor-intensive hand-crafting required for traditional natural stone installation.
3Shape
If artificial pavers are made to mimic natural stone appearance, then aesthetic appeal is improved, but shock absorption performance deteriorates
Solution Approach 1:
The patent applies local quality by differentiating between the surface layer and the bulk material. The surface layer is designed to mimic natural stone appearance with appropriate textures and colors, while the bulk material incorporates rubber particles or foam structures for shock absorption. This local differentiation allows simultaneous achievement of aesthetic appeal and safety performance.
Solution Approach 2:
The composite structure allows the surface to maintain stone-like appearance while the internal matrix provides shock absorption. The polyurethane-rubber composite can be formulated to have a rigid, stone-like surface layer for aesthetics and a more flexible internal structure for impact absorption, resolving the contradiction between appearance and safety.
4Object-affected harmful factors
If pavers are made softer to improve shock absorption, then safety during falls is improved, but load-bearing capacity and durability may deteriorate
Solution Approach 1:
The patent optimizes the concentration of rubber particles (5-50% by weight) or foam content to achieve the right balance between softness and strength. At lower concentrations (5-20%), the material maintains high load-bearing capacity while providing shock absorption. At higher concentrations (20-50%), shock absorption is maximized for safety-critical applications. This parameter optimization resolves the contradiction between softness and strength.
Solution Approach 2:
The composite structure of polyurethane resin with rubber reinforcement provides both flexibility for shock absorption and structural integrity for load-bearing. The rubber particles act as both shock-absorbing elements and reinforcement agents, preventing the material from becoming too soft while still providing impact protection. This composite approach simultaneously achieves safety and durability.
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 two-component polyurethane artificial pavers provide enhanced safety through improved shock absorption and aesthetic appeal, reducing the risk of injury from falls while being cost-effective and easy to manufacture and install, suitable for various surface types and designs.
Implementation Method 1
The two-component polyurethane material may be formulated to characterize the artificial paver to be softer than a stone or concrete paving object and to exhibit higher shock absorbing properties than the stone or concrete paving object
Data Source
AI summary
An artificial paver comprises a physical member adapted to have a structure shape of a paver and located on the top surface of a paving area. The physical member may be made of a two-component polyurethane material, and the two-component material may be formulated to characterize the artificial paver to be softer than a stone or concrete paving object and to exhibit higher shock absorbing properties than the stone or concrete paving object. A method for manufacturing the artificial paver is also contemplated. The method may comprise pouring the two-component polyurethane material into molds, allowing the two-component polyurethane material in the molds to cure, demolding the cured two-component polyurethane material, and applying an UV stable polyurethane and slip-resistant coating to a surface of the demolded two-component polyurethane material.