Knit Tubular Sleeve With Dual-Layer Thermal And Abrasion Protection
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Solution Overview
Problem
Heat-resistant yarns used in tubular sleeves for protecting elongate members are susceptible to damage from abrasion and impact, reducing the useful life of the sleeves.
Innovation Solution
A dual-layer knit sleeve construction with a heat-resistant inner wall and an impact-resistant outer wall, where the outer wall is coated with materials like silicone or Teflon for enhanced protection, and the inner wall prevents heat from radiating outward to protect the outer wall from degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat-resistant yarns are used to construct tubular sleeves for thermal protection, then thermal barrier effectiveness is improved, but susceptibility to damage from abrasion and impact increases
Solution Approach 1:
The patent applies composite materials by constructing the sleeve with multiple layers of different materials: an inner heat-resistant layer (silica, fiberglass, ceramic, basalt, aramid or carbon yarns) for thermal protection and an outer abrasion-resistant layer (polyester, nylon, polypropylene, or polyethylene yarns) for mechanical protection. This composite structure allows each layer to perform its specialized function, resolving the contradiction between thermal effectiveness and damage resistance
Solution Approach 2:
The patent segments the sleeve into distinct functional layers: an inner heat-resistant layer and an outer abrasion-resistant layer. This segmentation allows each layer to be optimized for its specific purpose without compromising the other, enabling the heat-resistant yarns to focus on thermal protection while the outer layer handles mechanical protection
2Temperature
If a single-layer heat-resistant sleeve is used, then thermal protection is provided, but useful life is diminished due to damage from abrasion and impact
Solution Approach 1:
The patent uses composite materials with an inner heat-resistant layer and an outer abrasion-resistant layer, where the outer layer protects the inner thermal protection layer from mechanical damage, thereby extending the useful life of the sleeve while maintaining thermal protection
Solution Approach 2:
The outer abrasion-resistant layer serves as a protective buffer that absorbs mechanical damage from abrasion and impact before it can reach the inner heat-resistant layer, providing beforehand cushioning that extends the service life of the thermal protection system
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 dual-layer design provides optimal thermal protection and durability, extending the lifespan of the sleeves by preventing heat radiation and damage from abrasion and impact, while maintaining the effectiveness of the heat-resistant inner wall and impact-resistant outer wall.
Implementation Method 1
the inner wall prevents heat from radiating outwardly, thereby preventing degradation to the yarn forming the outer wall
Implementation Method 2
coated with an impact and/or abrasion resistant material to provide enhanced protection to the inner wall against damage from impact and/or abrasion
Data Source
AI summary
A knit sleeve for providing thermal protection about an elongate member contained therein and method of construction thereof is provided. The sleeve includes a knit inner wall with opposite edges extending lengthwise between opposite ends and a circumferentially continuous tubular outer wall knit integrally with the inner wall. The outer wall bounds a central cavity that extends lengthwise along a central axis between open opposite ends of the outer wall. The opposite edges of the inner wall are substantially parallel to the central axis and are wrappable toward one another to form the inner wall as being tubular. The circumferentially continuous tubular outer wall is configured to be everted about the wrapped inner wall to circumferentially surround and protect the inner wall from abrasion and provide the sleeve with a dual layer wall.