Insulating Paint Cable Coating for Moisture-Sealed Shielding
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Solution Overview
Problem
Existing high-frequency signal cables suffer from moisture ingress at the wrapping interface between the insulating and outer layers, leading to oxidation of the shielding layer and compromised shielding performance.
Innovation Solution
The cable incorporates an insulating paint as the outer layer, which covers the wrapping interface to prevent moisture and air from reaching the shielding layer, thereby preventing oxidation and enhancing moisture-proof performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If spiral winding insulation and outer layer are used, then manufacturing is simplified, but moisture-proof performance deteriorates due to interface gaps
Solution Approach 1:
The patent uses a heat-shrinkable film as the outer layer instead of a spiral-wound outer layer. This film is applied over the spiral-wound insulating layer and then heat-shrunk to form a tight, continuous moisture barrier that eliminates interface gaps while maintaining the manufacturing simplicity of spiral winding for the insulating layer.
Solution Approach 2:
The patent combines spiral-wound insulation with a heat-shrunk film outer layer to create a composite structure. The spiral-wound layer provides mechanical support and insulation, while the heat-shrunk film provides continuous moisture protection, achieving both ease of manufacture and reliable moisture-proof performance.
2Ease of manufacture
If spiral winding structure is used for insulating and outer layers, then manufacturing cost is reduced, but shielding performance deteriorates due to oxidation
Solution Approach 1:
The heat-shrinkable film outer layer forms a continuous protective barrier that prevents moisture and air from reaching the shielding layer, thereby preventing oxidation and maintaining shielding performance while keeping manufacturing costs low through the use of simple spiral winding for the insulating layer.
Solution Approach 2:
The heat-shrinkable film acts as an intermediary protective layer between the external environment and the shielding layer. It mediates by blocking moisture and air pathways that would otherwise reach the shielding layer through spiral winding interface gaps, preventing oxidation without requiring changes to the cost-effective spiral winding structure.
3Reliability
If continuous outer layer is used, then moisture-proof performance is improved, but device complexity increases
Solution Approach 1:
The heat-shrinkable film provides a continuous moisture barrier through a simple application process: the film is placed over the spiral-wound insulating layer and then heat-shrunk. This creates a continuous protective layer without requiring complex multilayer spiral winding structures, thus improving moisture-proof performance while maintaining relatively simple device structure.
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 use of insulating paint as the outer layer significantly improves moisture-proof performance, ensures stable signal transmission, and reduces manufacturing costs while maintaining high-speed data transmission capabilities above 80 GHz.
Implementation Method 1
Moisture and air can easily enter from the wrapping interface and come into contact with the shielding layer, causing oxidation of the shielding layer
Implementation Method 2
the outer layer is an insulating paint... the insulating paint covers the wrapping interface to isolate air and moisture
Data Source
AI summary
A cable includes: a core wire; a shielding layer covering the core wire; an insulating layer covering the shielding layer; and an outer layer covering the insulating layer; wherein the outer layer is an insulating paint.