Flat Shortcut Fiber for Uniform Liquid Dispersion
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Solution Overview
Problem
Existing technologies face challenges in achieving uniform dispersion of shortcut fibers in fiber dispersed liquids, especially under high-speed stirring conditions, due to entanglement and agglutination issues.
Innovation Solution
The development of a shortcut fiber with a high cross-sectional flatness, average minor axis length of 2,000 nm or less, and a variation in minor axis length of 10% or more, which limits bending direction and inhibits entanglement, even at high speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fiber length is reduced to less than 1 mm to achieve uniform dispersion, then dispersibility is improved, but fiber strength and structural integrity deteriorate
Solution Approach 1:
The fiber is segmented into a bundle of multiple ultrafine filaments (each 1-10 micrometers in diameter) rather than a single thick fiber. This segmentation allows the fiber bundle to maintain overall structural integrity while individual filaments remain short enough for uniform dispersion, resolving the contradiction between dispersibility and strength.
Solution Approach 2:
The fiber is constructed as a composite structure with a core component providing mechanical strength and an outer sheath component providing flexibility and dispersibility. This composite architecture enables the fiber to maintain strength despite reduced length, while the sheath facilitates uniform dispersion in the liquid medium.
2Quantity of substance
If fiber diameter is reduced to enhance specific surface area effects, then adsorption capacity is improved, but fiber flexibility and entanglement tendency worsen
Solution Approach 1:
The fiber is divided into multiple ultrafine filaments (1-10 micrometers diameter) arranged in a bundle. This segmentation dramatically increases the total specific surface area for enhanced adsorption capacity, while the bundled structure prevents individual filaments from excessive bending and entanglement.
Solution Approach 2:
The fiber diameter parameter is optimized to 1-10 micrometers, which is sufficiently small to provide high specific surface area for adsorption, yet large enough to maintain structural stability and reduce entanglement. This parameter change resolves the contradiction between adsorption capacity and entanglement resistance.
3Ease of operation
If high-speed stirring is applied to achieve uniform dispersion, then dispersibility is improved, but fiber damage and energy consumption worsen
Solution Approach 1:
The fiber is pre-processed into a bundle of ultrafine filaments with controlled diameter (1-10 micrometers) and appropriate aspect ratio before dispersion. This preliminary structural preparation enables the fiber to disperse uniformly under milder stirring conditions, reducing the need for high-speed stirring and thereby lowering energy consumption while avoiding fiber damage.
4Manufacturing precision
If fiber length is reduced to inhibit entanglement, then uniform dispersion is improved, but fiber functionality and reinforcement effect worsen
Solution Approach 1:
The fiber is segmented into a bundle of multiple ultrafine filaments (1-10 micrometers diameter) with controlled length. This segmentation enables uniform dispersion by reducing individual filament length, while the collective bundle structure maintains sufficient reinforcement effect when incorporated into composite materials.
Solution Approach 2:
The fiber employs a composite architecture where the core component provides reinforcement strength and the outer sheath component facilitates uniform dispersion. This composite structure allows the fiber to achieve both uniform dispersion and effective reinforcement functionality simultaneously.
Data Source
Figure 1~3
Figure 4
Figure 5(a)~5(b)
AI summary
Provided is a shortcut fiber that has a flatness, which is a value obtained by dividing a major axis length of a fiber cross section by a minor axis length of the fiber cross section, of 5 or more, and an average minor axis length of 2,000 nm or less. The present invention relates to a shortcut fiber exhibiting excellent dispersibility in a liquid medium, and provides a shortcut fiber suitable for obtaining a uniform fiber dispersed liquid without entanglement and the like of the shortcut fiber even in a wide range of stirring conditions.