Foamed Polymer Separator for Data Cables
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Solution Overview
Problem
Conventional data communications cable separators made of polyolefins and fluoropolymers have poor smoke and flame-retardant properties, leading to increased smoke emission and flame spread during fires, and adding flame retardants can degrade electrical performance and introduce hazardous halogen gases, while also being structurally weak and heavy.
Innovation Solution
A foamed thermoplastic polymer separator with a glass transition temperature above 160°C, made from halogen-free high-performance polymers like polyetherimide, which provides improved flame resistance, reduced smoke emission, and increased structural integrity without the need for halogen-containing additives, thereby reducing weight and maintaining electrical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional polyolefin and fluoropolymer materials are used for cable separators, then adequate electrical insulation is provided, but smoke and flame-retardant properties are poor
Solution Approach 1:
The patent changes the fundamental material parameter by using halogen-free high-performance polymers with inherently low smoke and flame spread properties, eliminating the need for halogen-containing flame retardants while maintaining electrical insulation performance
Solution Approach 2:
The patent employs composite material construction by combining halogen-free polymer matrices with specific foaming agents and additives to create a foamed separator structure that achieves both fire safety and electrical performance requirements
2Object-affected harmful factors
If flame retardants and smoke suppressants are added to conventional separator materials, then flame spread and smoke emission are reduced, but dielectric constant and dissipative factors increase
Solution Approach 1:
The patent extracts and eliminates halogen-containing flame retardants and smoke suppressants from the separator composition, replacing them with halogen-free high-performance polymers that provide fire safety without the harmful electrical performance side effects
Solution Approach 2:
The patent converts the previously harmful halogen-containing additives into a benefit by completely eliminating them and using inherently fire-safe halogen-free polymers, thereby achieving fire protection without electrical performance degradation
3Object-affected harmful factors
If halogen-containing flame retardants are used, then flame spread is reduced, but hazardous acidic gases are released during combustion
Solution Approach 1:
The patent eliminates halogen-containing flame retardants that produce hazardous acidic gases during combustion, replacing them with halogen-free high-performance polymers that provide flame spread resistance without releasing harmful gases
4Strength
If separators are made solid and dense to ensure mechanical strength, then structural integrity is maintained, but cable weight increases
Solution Approach 1:
The patent employs porous foamed structure of halogen-free high-performance polymers that provide adequate mechanical strength through the foam matrix architecture while significantly reducing material density and cable weight
Solution Approach 2:
The patent uses composite material formulation combining halogen-free polymers with foaming agents to create a lightweight foamed separator that maintains structural integrity through optimized foam cell structure rather than increased material density
5Weight of moving object
If conventional materials are foamed to reduce weight, then cable weight decreases, but mechanical stability and strength are compromised
Solution Approach 1:
The patent changes the material parameter by using halogen-free high-performance polymers with higher inherent strength and thermal stability, enabling greater foam expansion ratios while maintaining mechanical stability that conventional materials cannot achieve
Solution Approach 2:
The patent employs composite material formulation with halogen-free polymers and optimized foaming additives to create a foamed structure with enhanced mechanical properties that maintain stability during cable processing and 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 foamed thermoplastic polymer separator effectively reduces crosstalk, improves flame and smoke resistance, and decreases cable weight while maintaining mechanical stability and electrical performance, meeting federally regulated standards for flame spread and smoke emission without releasing hazardous gases.
Implementation Method 1
Conventional separators are typically made of dielectric materials, such as polyolefin and fluoropolymers, which provide adequate electrical insulation
Implementation Method 2
A foamed material is any material that is in a lightweight cellular form resulting from introduction of gas bubbles during the manufacturing process
Implementation Method 3
wherein the preshaped body is substantially entirely formed of a foamed thermoplastic polymer having a glass transition temperature above 160°C
Data Source
Figure 1
Figure 2A~2B
Figure 2C
AI summary
A cable separator comprising a preshaped article having a longitudinal length, wherein said preshaped article is substantially entirely formed of a foamed polymer material having a glass transition temperature greater than 160°C and being halogen-free is provided. A data communications cable comprising a plurality of conductors and the cable separator of the present invention, wherein said cable separator separates the plurality of conductors is provided. A method of manufacturing a cable comprising the separator of the invention is also provided.