Recycled TPO Building Materials Through Heat Compression
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Solution Overview
Problem
Existing thermoplastic roofing membranes (TPO) are discarded after their lifespan, contributing to landfill pollution and have high Global Warming Potential (GWP), necessitating a recycling system that reduces environmental impact and maintains industry supply chains.
Innovation Solution
Recycling TPO membranes into building materials like insulation facers and coverboards by shredding, granulating, and compressing them with additives such as PET fibers and biofillers, and using induction welding for assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If TPO roofing membranes are discarded after their lifespan, then landfill pollution increases, but the simplicity of disposal is maintained
Solution Approach 1:
The patent implements a recycling system that recovers TPO roofing membranes after their service life. The process collects used TPO, shreds it into granules, and reformulates it into new building materials such as insulation facers and coverboards. This transforms the linear dispose-and-waste model into a circular economy approach, preventing TPO from entering landfills while maintaining economic value through material recovery and reuse.
2Ease of manufacture
If conventional cover boards are manufactured, then building materials are produced, but Global Warming Potential increases
Solution Approach 1:
The patent creates composite building materials by combining shredded TPO granules with binding agents and potentially other recycled or sustainable materials. This composite approach produces coverboards and insulation facers with reduced Global Warming Potential compared to conventional virgin material production, while maintaining the necessary structural and functional properties for building applications.
3Loss of substance
If TPO is recycled into building materials, then landfill waste is minimized, but the recycling process complexity increases
Solution Approach 1:
The recycling process is segmented into distinct operational stages: collection of used TPO membranes, shredding into granules, formulation with binding agents, molding into specific building material shapes, and curing. This segmentation allows each step to be optimized independently and facilitates integration with existing manufacturing equipment and processes, reducing overall system complexity despite the multi-step nature of recycling.
4Ease of manufacture
If recycled TPO is used in the same industry, then supply chains are simplified, but application versatility is limited
Solution Approach 1:
The patent demonstrates that recycled TPO granules can be formulated into multiple types of building materials including insulation facers, coverboards, and potentially other construction products. By adjusting formulation ratios, adding different binding agents, and varying molding parameters, the same recycled TPO feedstock can produce materials suitable for different building applications, thereby expanding versatility while maintaining supply chain simplicity within the roofing and construction industry.
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
Minimizes landfill waste, reduces GWP, and provides superior mechanical properties and assembly efficiency, while maintaining the materials within the roofing industry.
Implementation Method 1
heating and compressing the shredded or granulated or pulverized thermoplastic material to form a rigid building material
Implementation Method 2
heating and compressing the shredded or granulated or pulverized thermoplastic material to form a rigid building material
Implementation Method 3
using induction welding for assembly
Data Source
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AI summary
A method of forming a building material by: supplying a shredded or granulated thermoplastic material having post-industrial or post-consumer use thermoplastic material; and then heating and compressing the shredded or granulated thermoplastic material to form a rigid building material.