Shielded Cable Coating With Functionalized Fillers for Crack Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional shielded cables with fluoropolymer insulating coatings face challenges in balancing heat dissipation and mechanical stress resistance, as the addition of heat-dissipating fillers can lead to cracking due to poor interaction and reduced mechanical resistance.
Innovation Solution
A shielded cable design featuring an insulating coating composed of an acid-modified fluoropolymer with heat-dissipating fillers, such as boron nitride, that have functional groups like NH2 and OH on their surface, providing improved adhesion and mechanical strength while maintaining heat dissipation properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat-dissipating fillers are mixed with fluoropolymer to increase heat dissipation property, then heat dissipation property is improved, but resistance to mechanical stress is reduced
Solution Approach 1:
The invention changes the surface parameters of the filler particles by introducing functional groups (NH2 and/or OH groups) through surface treatment. This modification alters the chemical properties of the filler surface, enabling better interaction with the fluoropolymer matrix and resolving the mechanical strength degradation caused by filler addition while maintaining heat dissipation capabilities
Solution Approach 2:
The invention creates a composite material system consisting of fluoropolymer base resin combined with heat-dissipating fillers that have been surface-modified with specific functional groups. This composite structure leverages the thermal conductivity of fillers while the surface functional groups ensure strong interfacial bonding, achieving both heat dissipation and mechanical integrity
2Temperature
If heat-dissipating fillers are mixed with fluoropolymer, then heat dissipation property is improved, but cracks occur at the interface between fluoropolymer and fillers during deformation
Solution Approach 1:
The invention modifies the surface chemical parameters of fillers by introducing NH2 and/or OH functional groups, which change the interfacial interaction characteristics between filler and fluoropolymer. This prevents crack formation at the interface during deformation while preserving the heat dissipation function of the filler particles
Solution Approach 2:
The functional groups (NH2 and OH groups) on the filler surface act as intermediaries that facilitate bonding between the inorganic filler particles and the organic fluoropolymer matrix. These intermediary groups create a transition zone at the interface that prevents stress concentration and crack initiation
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 achieves excellent heat dissipation and mechanical stress resistance, suitable for applications like endoscope cables and thin personal computers, by enhancing the bonding between the fluoropolymer and fillers, reducing crack formation under deformation.
Implementation Method 1
heat-dissipating insulating material with high thermal conductivity which is formed of a mixture of vinyl chloride and one or more of silica, alumina, magnesium oxide, boron nitride, and beryllium oxide
Implementation Method 2
an insulating coating which comprises a base resin which contains an acid-modified fluoropolymer, and a heat-dissipating filler which is included in the base resin, the heat-dissipating filler being electrically insulating and having at least one functional group of NH2 group and OH group on its surface
Data Source
AI summary
A shielded cable includes at least one electric wire or cable, a shield being provided around the at least one electric wire or cable and including a plurality of wires comprising a metal material, an insulating coating being provided around the shield in direct- and plane-contact with the plurality of wires. The insulating coating includes a base resin composed of acid-modified fluoropolymer, and a heat-dissipating filler included in the base resin. The heat-dissipating filler is electrically insulating and has at least one functional group of NH2 group and OH group on its surface.