Self-Wrapping EMI Shielding Textile Sleeve
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Solution Overview
Problem
Existing multilayer sleeves for protecting wires against environmental and electromagnetic interference are bulky, heavy, and costly, making them unsuitable for applications requiring flexibility and weight restrictions, such as aerospace and aircraft use.
Innovation Solution
A self-wrapping textile sleeve constructed from interlaced heat-settable polymeric yarns and bi-component metallic wires with an aluminum core and copper outer layer, woven in specific directions to form a tubular cavity that provides protection against electromagnetic interference while being lightweight and flexible.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If solid copper wire is used for EMI shielding, then electromagnetic interference protection is improved, but weight increases
Solution Approach 1:
The patent uses a composite structure with aluminum core and copper cladding. The aluminum core provides structural support and partial EMI shielding, while the copper outer layer provides enhanced EMI protection. This composite approach reduces weight compared to solid copper while maintaining effective electromagnetic interference shielding.
Solution Approach 2:
The patent changes the material composition parameter from solid copper to aluminum-copper composite, optimizing the balance between EMI shielding effectiveness and weight. The bi-component yarn structure allows tuning of the aluminum-to-copper ratio to achieve desired performance characteristics.
2Object-affected harmful factors
If multilayer sleeves are used for comprehensive protection, then protection effectiveness is improved, but flexibility deteriorates
Solution Approach 1:
The patent integrates multiple protective functions into a single composite textile structure. The bi-component yarns with aluminum core and copper cladding provide both mechanical strength and EMI shielding in one element, eliminating the need for separate rigid layers while maintaining flexibility.
Solution Approach 2:
The patent uses a flexible textile construction with woven or knitted bi-component yarns that form a conformable sleeve. This flexible structure can be routed through tight spaces and adapts to various shapes while providing comprehensive protection against environmental and electromagnetic conditions.
3Object-affected harmful factors
If solid copper wire is used for EMI shielding, then electromagnetic interference protection is improved, but the sleeve becomes bulky
Solution Approach 1:
The aluminum-copper composite yarn structure achieves effective EMI shielding with reduced material volume. The high conductivity of both aluminum and copper allows for thinner shielding layers compared to solid copper, reducing the overall sleeve volume while maintaining protection effectiveness.
4Object-affected harmful factors
If multiple protective layers are used, then comprehensive protection is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines multiple protective functions into a single integrated textile structure. The bi-component yarns provide both mechanical protection and EMI shielding simultaneously, eliminating the need for separate water-resistant, abrasion-resistant, and EMI-shielding layers, thereby reducing manufacturing complexity and cost.
Solution Approach 2:
The bi-component yarn structure serves multiple functions: the aluminum core provides structural support and partial shielding, while the copper cladding provides enhanced EMI protection and corrosion resistance. This multi-functional material reduces the need for additional specialized layers.
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 offers effective protection against electromagnetic interference, reduced weight, and enhanced flexibility, making it suitable for routing through tight spaces and weight-restricted applications, while maintaining cost-effectiveness.
Implementation Method 1
At least one of the yarns is provided as heat-settable polymeric yarn that is heat-set to bias the wall into a self-wrapping configuration
Implementation Method 2
at least one of the yarns is provided as a bi-component metallic wire having an aluminum core and an outer layer of copper
Data Source
Figure 1~3
AI summary
A self-wrapping, textile sleeve for routing and protecting elongate members from electromagnetic interference and a method of construction thereof is provided. The sleeve has an elongate wall constructed from interlaced yarns. At least one of the yarns is provided as heat-settable polymeric yarn that is heat-set to bias the wall into a self-wrapping configuration about a longitudinal central axis of the sleeve to bring opposite edges into overlapping relation with one another to provide a generally tubular cavity in which the elongate members are received. Further, at least one of the yarns is provided as a bi- component metallic wire having an aluminum core and an outer layer of copper.