Bituminous Adhesive Bonding for Lightweight Solar Modules
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Solution Overview
Problem
Conventional photovoltaic modules are too heavy for certain roofs, and existing adhesives like butyl type glues have inconsistent adhesion on bitumen membranes, making it difficult to efficiently fix lightweight photovoltaic modules on bituminous waterproofing membranes.
Innovation Solution
A bituminous bonding binder comprising 0.1 to 5% organogel additives, such as hydrazide derivatives or sebacic acid, is used to enhance the adhesion and resistance to tearing and takeoff of photovoltaic modules on bituminous waterproofing membranes, with a softening temperature above 80°C and improved creep resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If butyl adhesive is used to bond photovoltaic modules to bitumen membranes, then bonding is achieved, but adhesion is variable and expensive
Solution Approach 1:
The patent modifies the bitumen adhesive composition by adding specific additives (polymer emulsion and coupling agent) to change its bonding parameters, achieving consistent adhesion to bitumen membranes without requiring surface preparation
Solution Approach 2:
The patent introduces a coupling agent as an intermediary substance that mediates the bonding between the bitumen adhesive and the photovoltaic module, ensuring consistent adhesion regardless of bitumen composition variations
2Power
If conventional photovoltaic modules are installed, then power generation is achieved, but roof load capacity is exceeded
Solution Approach 1:
The patent employs flexible thin-film photovoltaic modules that can be laminated directly onto the roof surface, achieving power generation while minimizing weight and structural load requirements
Solution Approach 2:
The patent replaces heavy mechanical mounting systems with a chemical bonding system using modified bitumen adhesive, eliminating the need for rigid support structures and reducing overall system weight
3Weight of moving object
If lightweight photovoltaic modules are used, then roof load requirements are met, but bonding reliability on bitumen membranes is insufficient
Solution Approach 1:
The patent modifies the adhesive parameters by incorporating polymer emulsion and coupling agents into the bitumen formulation, enhancing bonding strength to reliably support even lightweight photovoltaic modules
Solution Approach 2:
The patent creates a composite adhesive material combining bitumen with polymer emulsion and coupling agents, achieving superior bonding properties that ensure reliability for lightweight module installation
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 solution provides strong and durable bonding with increased adhesion and resistance to high temperatures, reducing the overall quantity of additives needed and lowering application temperatures, thus reducing costs and energy consumption while maintaining bonding performance.
Implementation Method 1
the bituminous bonding binder comprises from 0.1 to 5% by weight of at least one organo-freezing additive
Implementation Method 2
the establishment of one or more of these interactions will be favoured by the architecture of the organogelator molecules. The establishment of one or more of these interactions includes, in particular, hydrogen bonding
Implementation Method 3
improved resistance to pull-out and peel-off... with improved resistance to pull-out and peel-off... resistance to high temperatures
Data Source
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Figure 2
AI summary
The present application relates to the use of a bituminous adhesive binder comprising at least one organogelator additive, for attaching photovoltaic modules, in particular lightweight modules.