Recycled Plastic Core Cover Board for Moisture Resistance
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Solution Overview
Problem
Existing roofing systems for flat or low-slope roofs face challenges in providing adequate water resistance, as common cover boards absorb water in the event of leaks and deteriorate, compromising the insulation and waterproofing membrane.
Innovation Solution
A cover board with a core made from recycled materials, including a concentration of plastic greater in specific regions, formed by shredding and heating composite materials like beverage cartons and trash bags, which acts as a binder without additional chemicals, providing a moisture-resistant and mold-resistant solution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If common cover boards (gypsum, fiberboard, dense ISO insulation) are used, then the roofing system provides basic structural support, but the cover boards absorb water in the event of leaks and deteriorate
Solution Approach 1:
The cover board uses a composite material consisting of recycled plastic materials combined with other recycled materials (such as paper, cardboard, or fabric) to create a water-resistant core that does not absorb moisture like traditional gypsum or fiberboard materials
Solution Approach 2:
The patent changes the material composition parameters by using recycled plastic materials as the primary component, which fundamentally alters the material's interaction with water from absorbent to repellent, thereby improving water resistance
2Reliability
If recycled plastic materials are used in the cover board, then water resistance is improved, but the manufacturing process requires heating and compressing shredded composite material
Solution Approach 1:
The manufacturing process utilizes the phase transition of recycled plastic materials from solid to molten state through heating, allowing the materials to be compressed and formed into the cover board structure, then cooling to set the final form
Solution Approach 2:
The patent changes physical parameters (temperature and pressure) during manufacturing to transform shredded composite materials into a dense, water-resistant cover board structure
3Ease of operation
If conventional cover boards are used, then installation is straightforward, but they deteriorate upon water exposure and compromise the insulation
Solution Approach 1:
The use of recycled plastic materials in composite form creates a durable cover board that resists water degradation, extending the service life of the roofing system while maintaining ease of installation similar to conventional cover boards
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 recycled plastic core cover board offers enhanced water resistance and durability, preventing moisture absorption and deterioration, while eliminating the need for hazardous chemicals and volatile organic compounds, thus improving the overall roofing system's performance.
Implementation Method 1
heating the shredded composite material
Implementation Method 2
The melted plastic material acts as a binder
Implementation Method 3
compressing the shredded composite material to form the cover board
Data Source
AI summary
A cover board for use in a roofing system includes a core formed from recycled material. The core has a first major surface and a second major surface and the recycled material includes a plastic material. At least one region of the core has a concentration of plastic greater than a concentration of plastic within a remainder of the core.