Bitumen Roofing Membrane with Recycled Polymer Reinforcement
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Solution Overview
Problem
There is a need for a more environmentally friendly roofing membrane that reduces the carbon footprint and utilizes sustainable and renewable components while maintaining the properties of a long-lasting roofing membrane.
Innovation Solution
A bitumen roofing membrane with a fiber reinforcement layer that incorporates recycled and traditionally processed modifiers and sourced additives, utilizing asphalt modifiers from non-traditional sources such as post-industrial and post-consumer recycled materials, and featuring a carbon dioxide absorbing property.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional roofing membrane materials are used, then the membrane provides adequate roofing performance, but the carbon footprint is high and environmental friendliness is poor
Solution Approach 1:
The patent changes the material composition parameters by incorporating recycled polymers (1-40% by weight), bio-based polymers (1-40% by weight), and natural fibers (1-40% by weight) into the bitumen matrix. These parameter changes reduce the carbon footprint while maintaining roofing performance through careful selection of material ratios and types.
Solution Approach 2:
The patent creates a composite roofing membrane by combining bitumen with multiple sustainable materials including recycled polymers, bio-based polymers, and natural fibers. This composite structure leverages the complementary properties of each material to achieve both environmental friendliness and reliable roofing performance.
2Object-affected harmful factors
If recycled and renewable materials are incorporated into the roofing membrane, then environmental friendliness improves, but material retention and durability may deteriorate
Solution Approach 1:
The patent optimizes the weight percentages of sustainable materials (1-40% each for recycled polymers, bio-based polymers, and natural fibers) to balance environmental benefits with material retention. This parameter optimization ensures that sustainable materials enhance eco-friendliness without compromising the membrane's durability and composition stability.
Solution Approach 2:
The patent develops a multi-component composite system where bitumen serves as the continuous matrix and sustainable materials are dispersed as reinforcements. This composite architecture allows the bitumen to provide baseline durability while the sustainable materials contribute to environmental performance, achieving both goals simultaneously.
3Object-affected harmful factors
If sustainable modifiers are used instead of traditional petrochemical modifiers, then carbon footprint is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent modifies the composition parameters by replacing traditional petrochemical modifiers with sustainable alternatives (recycled and bio-based polymers) in controlled amounts (1-40% by weight). This parameter change reduces carbon footprint while the moderate incorporation levels minimize manufacturing process complexity.
4Object-affected harmful factors
If natural fibers are incorporated into the bitumen membrane, then renewability improves, but UV and oxidation resistance may worsen
Solution Approach 1:
The patent creates a composite structure where natural fibers are embedded in a bitumen matrix that provides UV and oxidation protection. The bitumen acts as a protective barrier for the natural fibers, preventing direct exposure to degrading environmental factors while the fibers contribute to the membrane's mechanical properties and renewability.
Solution Approach 2:
The bitumen matrix serves multiple functions: it acts as the primary binding material, provides UV and oxidation resistance, and serves as a protective envelope for the natural fibers. This multi-functionality allows the natural fibers to contribute renewability without sacrificing UV and oxidation resistance.
Data Source
AI summary
A bitumen roofing membrane that includes a bitumen compound layer and a fiber reinforcement layer, and optionally a granular top surface layer. The filler and/or the fiber reinforcement includes 0.5-100 wt. % recycled material.