Flame Retardant Panel With Functionalized Polymer Tie Layers
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Solution Overview
Problem
Current flame retardant panels for building and construction applications face challenges in achieving high flame retardancy while maintaining mechanical properties and processing ease, as high amounts of additives like aluminum trihydrate lead to brittleness and increased production costs, making conventional manufacturing processes difficult and costly.
Innovation Solution
A flame retardant panel structure comprising external metal layers, functionalized polymer tie layers, and a core layer of glass fibers, which allows for comparable flame retardancy to high-demanding standards like DIN 4102 Class A2 while being manufactured at reasonable costs using conventional processes such as extrusion or calendering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high amounts of flame retardant additives (up to 90 wt-%) are incorporated into the thermoplastic polymer composition, then flame retardancy is improved, but mechanical properties deteriorate (plastic becomes brittle, loses elasticity)
Solution Approach 1:
The patent introduces a polyolefin graft copolymer as a mediator between the thermoplastic polymer and flame retardant additives. This graft copolymer contains both polyolefin chains (compatible with the thermoplastic matrix) and polar groups (compatible with the inorganic flame retardant additives like ATH), enabling effective dispersion at lower additive concentrations while maintaining mechanical integrity.
Solution Approach 2:
The patent changes the chemical parameter of the polymer matrix by introducing a polyolefin graft copolymer with specific functional groups. This modification allows the system to achieve effective flame retardancy at reduced additive concentrations (avoiding the 90 wt-% extreme), thereby preserving the mechanical properties of the final composite material.
2Reliability
If high amounts of flame retardant additives are incorporated into the thermoplastic polymer composition, then flame retardancy is improved, but processing characteristics deteriorate (cannot be processed by conventional means such as extrusion or calendering)
Solution Approach 1:
The polyolefin graft copolymer acts as a processing intermediary that improves the compatibility and dispersion of flame retardant additives within the thermoplastic matrix. This mediator reduces agglomeration and improves melt flow characteristics, enabling conventional processing methods like extrusion and calendering to function effectively even with significant flame retardant content.
3Reliability
If high amounts of expensive flame retardant additives such as aluminum trihydrate are used, then flame retardancy is improved, but production costs increase
Solution Approach 1:
The polyolefin graft copolymer mediator enhances the efficiency of flame retardant additive utilization. By improving dispersion and interfacial compatibility, less additive is required to achieve the same level of flame protection, thereby reducing the quantity of expensive materials needed and lowering overall production costs.
4Reliability
If high amounts of flame retardant additives are used, then flame retardancy is improved, but manufacturing complexity and investment cost increase
Solution Approach 1:
The polyolefin graft copolymer simplifies the manufacturing process by enabling effective flame retardancy at moderate additive concentrations that are compatible with conventional processing equipment and methods. This eliminates the need for specialized high-pressure or high-temperature equipment that would be required for processing compositions with extremely high additive loads (90 wt-%), thereby reducing manufacturing complexity and investment costs.
Data Source
AI summary
A flame retardant panel structure comprises at least one external metal layer, one or more tie layers comprising one or more functionalized polymers, and a core layer made of a fabric made of glass fibers. The flame retardant panel structure shows comparable flame retardancy properties while being manufactured at reasonable costs with conventional processes such as for example extrusion or calendering. The flame retardant panel structures can be used in applications where flame retardancy and/or fire protection is needed, such as for example in building and construction applications, automotive or railways applications, medical equipments and luggage.