Shape-Memory Active Yarn Textiles for Adjustable Compression
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Solution Overview
Problem
Conventional compression garments suffer from issues such as limited usability, inability to accommodate changes in patient needs over time, and require complex mechanisms for resizing, leading to discomfort and non-compliance, especially in medical applications.
Innovation Solution
Development of multifunctional active yarns and textiles that utilize torque-unbalanced active yarns within 2D textile structures to achieve tunable displacement, force, and stiffness through varying filament properties, knitting patterns, and structural elastic instability, enabling garments that can adapt to body position and activity levels without external power sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional compression garments use fixed levels of compression in elastic materials, then compression function is provided, but donning/doffing becomes difficult and patient compliance is compromised
Solution Approach 1:
The patent applies dynamics by making the compression level adjustable rather than fixed. The garment can transition between different compression states through active mechanisms (such as inflatable chambers or shape-memory materials) allowing the user to don the garment easily in a relaxed state and then activate compression only when needed, resolving the contradiction between providing compression force and ease of donning/doffing
Solution Approach 2:
The patent changes the parameter of compression level from a fixed value to a variable parameter that can be adjusted. By using active materials or mechanisms that allow dynamic adjustment of compression intensity, the garment can provide high compression when needed while maintaining ease of put on and take off, directly addressing the technical contradiction
2Force
If conventional compression garments use undersized design, then compression pressure is applied to body, but adaptability to changes in patient needs over time is limited
Solution Approach 1:
The patent makes the compression garment dynamic by enabling adjustment of compression levels over time. Patients can modify the compression intensity according to their changing medical needs, weight fluctuations, or activity levels, transforming a static undersized garment into an adaptive system that maintains effectiveness throughout the treatment period
Solution Approach 2:
The patent creates a multi-functional garment that can serve multiple compression levels and adapt to different body types and needs. The active mechanisms allow the same garment to provide varying degrees of compression for different patients or for the same patient at different stages of treatment, enhancing universality and adaptability
3Adaptability or versatility
If conventional compression garments use adjustable mechanisms such as lacing, buckles, hook and loop tape, or straps, then resizing is possible, but device complexity increases and comfort is reduced
Solution Approach 1:
The patent merges the resizing function directly into the fabric structure itself rather than adding separate adjustable mechanisms. By incorporating active materials or integrated adjustment systems within the textile construction, the garment achieves adaptability without the complexity and discomfort of external lacing, buckles, or straps
Solution Approach 2:
The patent enables the garment to adjust its own compression levels through active mechanisms that respond to user input or environmental conditions. This self-adjusting capability eliminates the need for complex manual adjustment systems like lacing or buckles, reducing overall device complexity while maintaining adaptability
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 provides garments with enhanced actuation capabilities, improved fit, and comfort by allowing dynamic adjustment of compression levels, reducing donning difficulties, and increasing patient compliance through programmable, multi-axial actuation and variable recruitment behaviors.
Implementation Method 1
The textile can include filaments or fibers made of active materials, such as shape memory materials that undergo a phase transformation between a martensite state and an austenite state in response to a change in temperature
Implementation Method 2
The textile can exhibit tunable displacement, force, and stiffness through varying filament properties, knitting patterns, and structural elastic instability
Data Source
AI summary
Yarns incorporating filaments of shape memory materials are described herein that enable the creation of fabrics, garments, and other materials with tunable force absorption or exertion capabilities, as well as creating complex shapes and structures upon actuation. Systems and methods described herein enable selective buckling, recruitment, compression, and other desirable phenomena by actuating fibers in knitted patterns, whether used as isolated filaments or in twisted yarns.