Moisture Management Yarn System for Thermal Regulation
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Solution Overview
Problem
Existing textile technologies fail to effectively manage moisture movement for thermal regulation, leading to inadequate cooling or warming effects in garments, particularly due to issues with incorporating phase change materials in melt spun synthetic fibers and the limited use of ultra microfibers in apparel.
Innovation Solution
A combination yarn system comprising microdenier hydrophobic polypropylene yarns and ultra microfibers with a high surface area, where the ratio of these yarns can be varied to enhance moisture movement and thermal regulation, allowing for both cooling and warming effects by managing moisture on fabric surfaces and spreading it for rapid evaporation or retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If phase change materials are incorporated in melt spun synthetic fibers, then thermal regulation properties are improved, but manufacturing complexity and process difficulty increase
Solution Approach 1:
The patent extracts the phase change material function from the fiber manufacturing process itself and replaces it with a post-processing application of phase change beads to the fabric surface. This eliminates the complexity of incorporating phase change materials during melt spinning while maintaining thermal regulation properties through the combination of moisture-wicking synthetic fibers and applied phase change beads.
Solution Approach 2:
The patent introduces fabric as an intermediary carrier between the moisture management function (performed by synthetic fibers) and the thermal regulation function (performed by phase change beads). The fabric structure serves as the medium through which moisture is transported to the phase change beads, simplifying the overall system while achieving both moisture management and thermal regulation.
2Productivity
If ultra microfibers are used to increase surface area for moisture spreading, then evaporation rate and cooling effect are improved, but fiber production difficulty increases
Solution Approach 1:
The patent segments the moisture management function across multiple synthetic fiber filaments within the fabric structure, creating numerous pathways for moisture transport. This segmentation achieves effective moisture spreading and rapid evaporation without requiring the production difficulty of ultra microfibers, as standard synthetic fibers can be configured in multi-filament yarns that provide sufficient surface area.
Solution Approach 2:
The patent changes the parameters of the synthetic fibers (such as denier, filament count, and fabric construction) to optimize moisture spreading capability. By adjusting these parameters within commercially available fiber ranges, the patent achieves rapid evaporation and cooling effects without venturing into the difficult-to-produce ultra microfiber territory.
3Temperature
If moisture is spread over a larger fabric area, then evaporation efficiency and cooling effect are improved, but fabric design complexity increases
Solution Approach 1:
The patent designs the fabric structure to perform multiple functions simultaneously: the synthetic fiber composition provides both moisture wicking and spreading capabilities, while the same fabric structure serves as the substrate for phase change bead application. This multi-functionality achieves wide moisture distribution for effective cooling without requiring separate systems for moisture management and thermal regulation.
Solution Approach 2:
Instead of spreading moisture through complex fabric constructions or ultra microfibers, the patent inverts the approach by using standard synthetic fibers to wick moisture to the fabric surface, where phase change beads then facilitate evaporation. This inversion simplifies fabric construction while achieving the desired wide moisture distribution and cooling effect.
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 system achieves superior thermal control by rapidly evaporating moisture for cooling or trapping it for insulation, outperforming Phase Transition Textile systems and commercially available fibers, with the ability to control temperature through the configuration and arrangement of yarn layers.
Implementation Method 1
the large surface area of the UMF fibers which are also hydrophobic. In the case of this technology both yarns are hydrophobic. The mechanism for moisture movement is both the hydrophobic nature of the polypropylene but also the large surface area of the UMF fibers which are also hydrophobic
Implementation Method 2
spread that moisture to an area larger than anything known to date for rapid evaporation
Implementation Method 3
or are trapped near the skin and help create an insulating layer, as in a scuba wet suit
Data Source
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AI summary
The invention provides a thermal control combination yarn system comprising a first plurality of the yarns within said system comprising microdenier or almost microdenier hydrophobic yarns, such as, for example, polypropylene (PP) and a second plurality of the yarns comprising less hydrophobic ultra microfibers (UMF). In some yarns comprised of a microdenier or almost microdenier hydrophobic material and 3% yarns comprised of ultra microfibers (UMF) comprised of a less hydrophobic material to 97% yarns comprised of ultra microfibers comprised of a less hydrophobic material and 3% yarns comprised of a microdenier or almost microdenier hydrophobic material and said first plurality of yarns is in direct contact with said second plurality of yarns.