Segmented Synthetic Fiber Sheath for Precise Groove Control
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Solution Overview
Problem
Existing methods for manufacturing synthetic fibers, such as mechanical embossment and conjugate spinning, face challenges in precisely controlling the groove structure and size, leading to unstable fiber formation and limited polymer types, which restricts the achievement of high strength and versatility in textile production.
Innovation Solution
A synthetic fiber design featuring a core and sheath structure with alternating segment and sacrificial portions, where the materials and proportions of these components can be freely modified, allowing for precise control over micro-structures and composition to enhance strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If mechanical embossment is used to produce grooves on fiber surfaces, then a sub-micron structure can be produced, but the groove structure and size cannot be precisely controlled
Solution Approach 1:
The sheath is divided into multiple segment portions and sacrificial portions arranged alternately. This segmentation allows precise control of groove structures by defining specific regions with different functions, where segment portions form the groove walls and sacrificial portions are removed to create controlled grooves
Solution Approach 2:
Sacrificial portions are intentionally designed into the sheath structure and then removed through dissolution or extraction processes. This extraction method enables precise groove formation by removing material from predetermined locations, achieving better structural control compared to mechanical embossment
2Adaptability or versatility
If conjugate spinning is used to manufacture hetero-segmented cross-section fibers, then two polymer filament materials can be combined, but the fiber shape is limited to flat and groove structure cannot be precisely controlled
Solution Approach 1:
Different regions of the sheath are assigned different materials with specific properties. Segment portions use materials compatible with the core for structural integrity, while sacrificial portions use materials that can be selectively removed. This local differentiation enables precise groove control while maintaining material versatility
Solution Approach 2:
The sacrificial portions act as intermediaries during manufacturing - they are temporarily present to define groove locations and dimensions, then removed to create the final groove structure. This intermediary approach enables precise structural control that cannot be achieved through direct molding
3Quantity of substance
If segment component is used to manufacture synthetic fibers with grooves, then multiple grooves can be formed, but groove formation is unstable and tends to break completely
Solution Approach 1:
The sheath structure uses asymmetric material distribution with distinct segment portions and sacrificial portions. This asymmetry creates inherent structural stability where segment portions provide continuous support while sacrificial portions are strategically positioned for removal, preventing complete breakdown during processing
4Manufacturing precision
If bi-component fiber is manufactured with high dissolving rate difference, then grooves can be formed, but the segments have undesirable physical properties
Solution Approach 1:
Instead of relying on extreme dissolving rate differences, the invention controls groove formation by adjusting material compatibility parameters and processing conditions. The segment and sacrificial portions use materials with controlled property differences that enable selective removal while maintaining overall fiber strength and desirable physical properties
Data Source
AI summary
A synthetic fiber including core and sheath is provided. The sheath covers the core and includes a plurality of segment portions and a plurality of sacrificial portions. The plurality of sacrificial portions are connected to the plurality of segment portions, where the plurality of segment portions and the plurality of sacrificial portions are arranged alternately to each other on an outer surface of the core, and the material of the plurality of segment portions is different with that of the plurality of sacrificial portions.