Power Cable Watertight Layer Using Copper Tape
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Solution Overview
Problem
Existing power cables face issues with weight, corrosion resistance, and adhesion strength, particularly with watertight layers that are prone to peeling due to physical impacts and temperature changes.
Innovation Solution
A power cable design featuring a center conductor, inner and outer semiconducting layers, a metal layer with metal wires, a watertight layer made of lightweight copper tape, an adhesive layer with high density and crystallinity, and an adhesion assisting layer to enhance the peel strength survival rate, ensuring the watertight layer remains adhered to the jacket even under harsh conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If aluminum laminated tape is used as the watertight layer, then corrosion resistance is improved, but the cable weight increases and adhesion strength deteriorates
Solution Approach 1:
The patent changes the material parameter from aluminum to copper, which has different properties: copper provides equivalent or superior corrosion resistance while being lighter in weight and offering better adhesion characteristics for the cable structure
Solution Approach 2:
The patent uses a composite structure with copper tape as the base material for the watertight layer, combining the benefits of copper's corrosion resistance and light weight with the structural requirements of the cable
2Reliability
If lead laminated tape is used as the watertight layer, then corrosion resistance is improved, but the cable weight increases significantly
Solution Approach 1:
The patent changes the material parameter from lead to copper, eliminating the excessive weight problem while maintaining corrosion resistance. Copper's density is significantly lower than lead, achieving the lightweight goal without sacrificing protective functionality
Solution Approach 2:
The patent selects copper as a more practical and sustainable material alternative to lead, which is not only heavier but also subject to environmental restrictions. Copper provides durable corrosion resistance with better environmental compatibility
3Reliability
If conventional watertight layers are used, then moisture protection is provided, but adhesion strength deteriorates under physical impact and temperature change
Solution Approach 1:
The patent employs a composite structure where copper tape is combined with specific adhesive layers that are engineered to maintain strong bonding between the watertight layer and external jacket under varying temperature and physical impact conditions
Solution Approach 2:
The patent modifies the adhesive properties by selecting materials with appropriate glass transition temperatures and bonding characteristics that ensure the watertight layer remains firmly adhered despite external physical impacts and temperature fluctuations
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 design results in a lightweight power cable with improved corrosion resistance and maintained adhesion strength, preventing peeling and extending the cable's lifespan by effectively suppressing moisture permeation and withstanding external impacts and temperature changes.
Implementation Method 1
an adhesive layer, which has a density of 0.93 or greater and a degree of crystallinity of greater than 50%, provided on an outer surface of the watertight layer
Data Source
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AI summary
The present invention relates to a power cable. More particularly, the present invention relates to a power cable which is, when compared to the existing power cables, lightweight and includes a watertight layer which improves a corrosion resistance and is effectively suppressed from being peeled since the interlayer adhesiveness thereof is maintained regardless of an externally physical impact and a temperature change.