Functionalized Thermoplastic Membrane Roofing Adhesion
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Solution Overview
Problem
Existing thermoplastic membrane roofing systems for flat or low-sloped roofs require a fleece backing for secure adhesion, which complicates installation and increases costs.
Innovation Solution
A thermoplastic membrane roofing system that uses a functionalized thermoplastic polymer in contact with an adhesive containing silicon-containing hydrolyzable terminal groups, allowing direct adhesion to the roof substrate without a fleece backing, forming a chemical bond between the membrane and the adhesive.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fleece backing is used to secure the membrane to the substrate, then adhesion is achieved, but installation complexity and cost increase
Solution Approach 1:
The patent removes the fleece backing layer from the membrane structure, extracting the element that caused installation complexity while preserving the essential adhesion function through direct chemical bonding between the membrane and adhesive
Solution Approach 2:
The mechanical interlocking provided by the fleece backing is replaced with a chemical bonding mechanism, where functional groups on the membrane surface form chemical bonds with the adhesive, eliminating the need for mechanical attachment structures
2Reliability
If a fleece backing is used to secure the membrane to the substrate, then adhesion is achieved, but material cost increases
Solution Approach 1:
The fleece backing material is completely removed from the system, eliminating the associated material costs while maintaining adhesion through the chemical bonding mechanism between the membrane and adhesive
Solution Approach 2:
The adhesion function previously provided by the separate fleece backing is merged directly into the membrane-adhesive interface, where the membrane surface itself provides the bonding capability through its functional groups
3Reliability
If a functionalized thermoplastic polymer is used in direct contact with adhesive, then chemical bond is formed, but manufacturing complexity increases
Solution Approach 1:
The membrane material is modified by incorporating functional groups (such as carboxyl, hydroxyl, or amine groups) into the thermoplastic polymer structure, changing the chemical parameters of the material to enable direct bonding with the adhesive without requiring additional layers or treatments
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
This solution simplifies the installation process and reduces costs by eliminating the need for a fleece backing while maintaining the mechanical and flame-resistant properties of the membrane, ensuring secure adhesion and compliance with wind uplift standards.
Implementation Method 1
an adhesive securing the membrane to the substrate, where the adhesive includes a cured residue of a polymer having a silicon-containing hydrolyzable terminal group
Data Source
Figure 1~2
Figure 3
AI summary
An adhered roofing system comprising a roof substrate, a thermoplastic membrane including at least one layer that includes a functionalized thermoplastic polymer, and an adhesive securing the membrane to the substrate, where the adhesive includes a cured residue of a polymer having a silicon-containing hydrolyzable terminal group.