Polyurethane Flooring Laminate Eliminates PVC Toxicity
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Solution Overview
Problem
Conventional multi-layered laminates used in flooring and transport vehicle applications face challenges with high toxicity and smoke generation upon combustion, dimensional instability, and excessive weight, which are not adequately addressed by existing materials and manufacturing processes.
Innovation Solution
A multi-layered laminate structure comprising a backing layer with thermoset or thermoplastic polymers and reinforcement fibers, a polyurethane-based base layer, and a cap layer, which eliminates PVC to reduce toxicity and smoke, while maintaining aesthetic features and dimensional stability, using roll-forming processing techniques to achieve a lightweight and durable product.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If PVC is used in laminate construction, then durability and abrasion resistance are improved, but toxicity and smoke generation upon combustion increase
Solution Approach 1:
The patent removes PVC entirely from the laminate construction and replaces it with alternative materials such as polyethylene terephthalate (PET) and other polymers that do not contain chlorine, thereby eliminating the source of HCl and toxic fume generation while maintaining the required mechanical properties through material substitution
Solution Approach 2:
The patent employs composite material structures combining multiple polymer layers (PET, polyurethane, acrylic, vinyl) with fibrous reinforcements (glass fiber, organic fiber) to achieve both the mechanical durability previously provided by PVC and the safety requirement of low toxicity and smoke generation upon combustion
2Stability of the object's composition
If laminate weight is increased to ensure rigidity and stability, then structural performance is improved, but dimensional limitations and waste increase
Solution Approach 1:
The patent uses composite construction combining lightweight polymers with strategic fiber reinforcement placements to achieve the required rigidity and dimensional stability without increasing overall weight, allowing for optimized cutting patterns and reduced waste in installation
Solution Approach 2:
The patent applies reinforcement fibers (glass fiber, organic fiber) selectively in specific regions and orientations within the laminate structure where mechanical strength and dimensional stability are most needed, rather than uniformly throughout, thereby minimizing material usage while achieving performance goals
3Ease of manufacture
If laminate is heated and stretched in mechanical lamination process, then layers are bonded together, but permanent distortion occurs along x or y axis
Solution Approach 1:
The patent modifies the thermal and mechanical processing parameters during lamination, using controlled heating and stretching within specific ranges that enable layer bonding while preventing permanent distortion, and incorporates cooling and relaxation steps to maintain dimensional stability
Solution Approach 2:
The use of composite material construction with fiber-reinforced polymer layers provides inherent dimensional stability that resists distortion during the mechanical lamination process, allowing the laminate to withstand heating and stretching without permanent deformation
Data Source
AI summary
The laminate according to the invention is a multiple layer structure and contains predominantly urethane-based polymeric materials in the cap and base layers thereof, with no significant amount of PVC. As such, under combustion conditions, the laminate releases substantially no harmful halogen-based bases, such as HCl or other toxic gases, and exhibits toxicity and smoke generation parameters well below acceptable industry standards.