Antimicrobial Copper Yarn with X-Shaped Cross-Section
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Solution Overview
Problem
Existing antimicrobial fabric coatings with metals like copper lose effectiveness over time due to laundering, failing to provide long-term prevention of bacterial growth and odor.
Innovation Solution
Copper-based yarns with water insoluble nanoparticles of electrolytic copper embedded in a polymeric component, spun into fibers with a generally 'X'-shaped cross-section for enhanced antimicrobial and wicking properties, integrated into fabrics through knitting or weaving with synthetic or natural yarns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antimicrobial coatings are applied to fabric, then bacterial growth is inhibited, but the antimicrobial activity is gradually lost over time as the garments are laundered
Solution Approach 1:
Copper nanoparticles are incorporated into the polymer matrix during the fiber spinning process, ensuring antimicrobial protection is built into the fabric structure from the beginning rather than applied as a surface coating that degrades over time
Solution Approach 2:
The invention combines copper nanoparticles with polymer fibers to create a composite material that integrates antimicrobial functionality directly into the fabric structure, providing long-lasting protection that withstands laundering
2Duration of action of stationary object
If copper nanoparticles are embedded in polymer fibers, then sustained antimicrobial protection is achieved, but the manufacturing process becomes more complex
Solution Approach 1:
The invention merges the fiber spinning process with nanoparticle incorporation and polymerization into a single integrated manufacturing step, eliminating the need for separate coating or treatment steps and simplifying production while achieving embedded antimicrobial protection
3Ease of operation
If fibers are spun with X-shaped cross-section, then wicking properties are enhanced, but manufacturing precision requirements increase
Solution Approach 1:
The invention modifies the spinneret hole geometry to produce fibers with an X-shaped cross-section, changing the physical parameter of fiber shape to enhance capillary wicking action while maintaining compatibility with standard spinning processes
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 copper-based yarns provide sustained antibacterial protection, quick drying, and UV protection, maintaining effectiveness after repeated washing and enhancing fabric comfort and durability.
Implementation Method 1
Various metals have been used as antimicrobial agents to inhibit or reduce the ability of bacteria to grow in fabric. In particular, copper and its alloys have been used to enhance antimicrobial properties of fabric used in garments.
Implementation Method 2
The holes of the spinneret are configured to impart a generally 'X'-shaped cross-section to each of the plurality of fibers
Data Source
AI summary
A method of making a yarn is disclosed. A plurality of fibers is obtained by: preparing a slurry of polymer mixed with water insoluble nanoparticles of electrolytic copper, and extruding the slurry through a spinneret that includes a plurality of holes which impart a generally “X”-shaped cross-section to the plurality of fibers. The plurality of fibers are spun together to form the yarn.