Low-smoke flame-retardant cable using copolyetherester and melamine
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Solution Overview
Problem
Existing cables face a challenge in achieving both good flammability performance and low smoke emission while providing effective insulation for electrically conducting elements, particularly in living and working environments as well as in vehicles or other forms of transportation.
Innovation Solution
A cable construction featuring an electrically or optically conducting element surrounded by an insulating layer comprising copolyetherester and melamine cyanurate, or melamine, or melem, or melam, and a jacket comprising copolyetherester and melamine cyanurate, or melamine, or melem, and at least one inorganic hydroxide, which is extruded around the conducting element to provide enhanced flammability and low smoke emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional flame-retardant materials are used in cable jackets and insulation, then flammability performance is improved, but smoke emission increases
Solution Approach 1:
The patent applies composite materials by combining copolyetherester elastomer with specific flame retardant compounds (melamine cyanurate, melamine, melem, or melam) and inorganic hydroxides. This composite approach creates a material system where the elastomer provides flexibility and insulation properties while the flame retardants provide fire resistance, and the specific combination achieves low smoke emission. The composite material resolves the contradiction by integrating multiple functional components that work synergistically to provide both flame retardancy and low smoke generation.
Solution Approach 2:
The patent applies parameter changes by optimizing the chemical composition and ratios of the flame retardant components. Specifically, it uses melamine cyanurate and/or melamine and/or melem and/or melam in combination with inorganic hydroxides at controlled concentrations. By adjusting these chemical parameters and the interactions between different compounds, the patent achieves a balance between flame retardancy and smoke suppression that conventional single-material approaches cannot attain.
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 described cable construction achieves good flammability performance, rated V2 or better, and low smoke emission, with specific optical density values below 50 and maximum smoke density values less than 250, meeting stringent safety standards for use in various environments.
Implementation Method 1
the jacket comprising copolyetherester and melamine cyanurate, and/or melamine, and/or melem and/or melam, and at least one inorganic hydroxide
Implementation Method 2
the insulating layer comprising copolyetherester and melamine cyanurate, and/or melamine, and/or melem and/or melam
Data Source
AI summary
A cable having good flammability performance and reduced smoke emission is provided.