Flexible, high temperature resistant, fluid resistant, abrasion resistant, multilayered wrappable textile sleeve and method of construction thereof
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing circumferentially continuous and wrappable textile sleeves fail to provide adequate protection against high temperatures, abrasion, and fluid ingress for extended periods, particularly for data transmission members like wires and hoses.
Innovation Solution
A multilayered wrappable textile sleeve with a textile outer layer, textile inner layer, and intermediate silicone-based layer, secured by a hook-and-loop closure, using high-temperature resistant yarns like ceramic and oxidized polyacrylonitrile fibers, to maintain protection against high temperatures and abrasion while preventing fluid ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If circumferentially continuous sleeves are used to protect elongate members, then protection against damage is provided, but assembly is challenging due to fixed cavity size and requirement to slip axially over the member
Solution Approach 1:
The continuous circumferential sleeve is divided into multiple discrete segments that can be independently positioned and assembled. These segments are then joined together to form a complete protective barrier, allowing for easier installation while maintaining continuous protection around the elongate member.
Solution Approach 2:
Instead of assembling the sleeve in a single axial direction by slipping it over the member, the invention uses multiple segments that can be assembled in a circumferential dimension. This allows the protective barrier to be constructed by joining segments around the member rather than sliding a single piece axially onto it.
2Reliability
If conventional textile sleeves are used, then basic protection is provided, but they fail to provide adequate protection against high temperatures, fluid ingress, and abrasion during extended fire exposure
Solution Approach 1:
The sleeve employs a composite structure with multiple distinct layers, each made from materials optimized for specific protective functions. The outer layer uses abrasion-resistant material, the intermediate layer uses fluid-resistant material, and the inner layer uses heat-resistant material, creating a composite protective system that addresses multiple hazards simultaneously.
Solution Approach 2:
Different layers of the sleeve are assigned different material properties tailored to specific protective needs. The outer layer is optimized for abrasion resistance, the intermediate layer for fluid resistance, and the inner layer for thermal protection. This local differentiation of material qualities allows each layer to perform its specific protective function effectively.
3Reliability
If the sleeve wall is made thicker to improve protection, then resistance to high temperature and abrasion improves, but flexibility and ease of wrapping deteriorates
Solution Approach 1:
The thick protective barrier is divided into multiple thinner layers, each contributing to the overall protection. This segmentation maintains flexibility because each individual layer remains thin and flexible, while collectively they provide the equivalent protection of a single thick layer. The segmented structure can also be wrapped more easily around irregular shapes.
Solution Approach 2:
The use of composite layered structure allows achieving high protection levels with thinner overall wall thickness. Each layer is optimized for specific protection needs, and the combination of multiple specialized layers provides superior protection compared to a single thick layer, while maintaining flexibility and wrapability.
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 sleeve effectively limits internal temperatures to 200°C or less for 2 hours at 1100°C exposure and 140°C for 850°C exposure, providing continuous protection against thermal and environmental damage.
Implementation Method 1
The multilayered wall can be formed to provide an internal temperature within a cavity bounded by the wall of about 200° C. or less when exposed to a flame of about 1100° C. for up to 2 hours
Implementation Method 2
The closure member can be provided as a hook-and-loop type fastener, with hooks being fixed along one of the opposite edges and loops being fixed along the other of the opposite edges
Data Source
AI summary
A wrappable sleeve for routing and protecting an elongate member, against exposure to high temperature, abrasion, fluid ingress, and contamination, has a multilayered wall extending widthwise between opposite edges and extending lengthwise along a longitudinal axis between opposite ends. The wall includes a textile outer layer, a textile inner layer, and an intermediate layer sandwiched between the outer layer and the inner layer. The intermediate layer includes a textile intermediate layer facing the textile inner layer and a silicone-based layer facing the textile outer layer.