Compressive Grippable Elastic Medical Fabric for Durable Hook Closures
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Solution Overview
Problem
Existing compression fabrics for medical devices, such as belts, lack sufficient durability to withstand repeated cycles of hanging and peeling, especially when equipped with hook-and-loop closure systems.
Innovation Solution
An elastic fabric design featuring parallel elastic and non-elastic warp threads, with non-elastic warp threads forming loops for hook attachment, and a specific weave structure that includes polyamide multi-filament gripping warp threads to enhance durability and grip performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional elastic fabrics with minimum tension of 250 cN/cm at 30% elongation are used for medical belts with hook-and-loop closure systems, then the fabric provides sufficient compressive effect and elasticity, but the fabric lacks sufficient durability to withstand numerous cycles of hanging and peeling
Solution Approach 1:
The patent changes the physical and chemical parameters of the fabric by incorporating specific elastane filament counts (933-1860 dtex) and polyamide multi-filament thread specifications (220 dtex, 10-12 monofilaments). These parameter modifications enhance the fabric's mechanical strength and loop durability, allowing it to withstand repeated hook-and-loop attachment cycles while maintaining compressive performance
Solution Approach 2:
The patent creates a composite fabric structure combining elastic warp threads (elastane filaments) with non-elastic gripping warp threads (polyamide multi-filament). This composite construction integrates the compressive elasticity needed for medical application with the mechanical strength required for durable hook attachment, resolving the contradiction between softness and durability
2Ease of operation
If the fabric is designed to be soft against the wearer's skin, then comfort is improved, but the fabric may lack the structural strength for durable hook-and-loop attachment
Solution Approach 1:
The patent applies local quality by differentiating the properties of different warp threads: elastic warp threads provide softness and compressive comfort against the skin, while non-elastic gripping warp threads with specific polyamide multi-filament construction provide localized strength for hook attachment. This spatial differentiation of material properties resolves the contradiction between softness and strength
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 fabric exhibits improved durability and resistance to mechanical wear, maintaining performance through numerous attachment and detachment cycles of hook closure systems, along with enhanced grip and softness against the skin.
Implementation Method 1
elastic warp threads, comprising one or more elastane filaments
Implementation Method 2
non-elastic warp threads, at least one part of which, called gripping warp threads, forms the loops, the at least one part being made up of multi-filament polyamide threads, composed of a twisted end
Data Source
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AI summary
The present invention relates to an elastic fabric for a medical device with a compressive effect, the fabric having a grippable face having loops and capable of being reversibly attached to a closure system with hooks, comprising: - elastic warp threads, comprising one or more elastane filaments, the count of the elastane filaments being between 933 dtex and 1860 dtex, - non-elastic warp threads, at least a portion of which forms the loops and is made up of polyamide multi-filament threads, composed of a twisted end having a count of 220 dtex and comprising between 10 and 12 monofilaments also twisted, the warp threads being parallel to each other and not crossing each other, and - non-elastic weft threads.