Foamed Polymer Cable Separator for Heat Dissipation and Fire Safety
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Solution Overview
Problem
There is a need for communication cables that can transmit both data and electrical power while minimizing cross-talk, heat management, and meeting stringent flame retardancy and low smoke generation requirements for plenum and riser areas in buildings, as per NFPA and European standards.
Innovation Solution
The development of a communications cable with a support separator providing multiple channels for transmission media, using foamed or solid polymeric materials for insulation and jacketing, which can carry at least 10 watts of electrical power, and includes optical fibers, with a jacket that facilitates efficient heat dissipation and reduces flammable material content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If foamed polymeric materials are used for insulation and jacketing, then flammable material content is reduced and heat dissipation is improved, but manufacturing complexity increases due to foamable composition requirements
Solution Approach 1:
The patent employs foamed polymeric materials with cellular structures to reduce flammable material content and improve heat dissipation. The foamable composition creates a porous structure that inherently reduces fuel load while enhancing thermal management through the cellular architecture.
Solution Approach 2:
The patent uses composite polymeric compositions that combine foamable polymers with flame retardant additives and heat dissipation agents. These composite materials integrate multiple functions (flame resistance, heat management, structural integrity) into a single material system.
2Adaptability or versatility
If multiple transmission media are integrated in a single cable, then cable versatility is improved, but cross-talk between channels increases
Solution Approach 1:
The patent divides the cable into distinct channels separated by support separators, with each channel accommodating different transmission media (optical fibers, electrical conductors). This segmentation physically isolates signals to prevent cross-talk while maintaining cable integration.
Solution Approach 2:
The patent applies different material properties to different regions of the cable - foamed materials in specific channels for thermal management, different insulation materials for electrical vs. optical channels, and targeted flame retardant concentrations in high-risk areas.
3Volume of moving object
If cable diameter is reduced for compact design, then installation ease is improved, but heat dissipation capability deteriorates
Solution Approach 1:
The foamed polymeric materials provide thermal management within a compact volume. The cellular structure of the foam creates internal surface area for heat exchange while maintaining small overall cable dimensions, enabling effective heat dissipation despite reduced size.
Solution Approach 2:
The patent moves heat dissipation from a radial function (requiring large cable diameter) to a volumetric function through the three-dimensional cellular structure of the foam. Heat can dissipate through the internal pore network, enabling compact cable design with adequate thermal management.
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 cable achieves efficient heat management, compact design, and compliance with stringent fire and smoke standards, ensuring reliable data and power transmission with reduced cross-talk and flammability.
Implementation Method 1
The separator, the insulation of the transmission media and/or the cable's jacket are formed of foamed polymers so as to facilitate the dissipation of heat generated in the cable
Implementation Method 2
facilitate the dissipation of heat generated in the cable
Implementation Method 3
The separator, the insulation of the transmission media and/or the cable's jacket are formed of foamed polymers
Data Source
AI summary
In one aspect, the present invention relates to a communications cable, which comprises a support separator providing a plurality of channels for receiving transmission media, said support separator comprising a first polymeric material, at least one optical fiber disposed in one of said channels, at least an electrical conductor capable of carrying at least about 10 watts of electrical power disposed in another one of said channels, an insulation at least partially covering said electrical conductor, a jacket surrounding said support separator and said transmission media, said jacket comprising a second polymeric material. In some embodiments, the first and second polymeric materials can be the same material, and in other embodiments, they can be different materials.