Industrial Fabric Binding Yarn Structure for Hydration Mark Reduction
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Solution Overview
Problem
Industrial fabrics face challenges in achieving excellent surface smoothness and filtering ability while preventing the formation of hydration marks, particularly diagonal marks, due to concave portions on the fabric surface that affect paper production.
Innovation Solution
The industrial fabric incorporates a structure with concave binding yarns that pull down the upper surface side warps or wefts and convex binding yarns that push up the upper surface side warps or wefts, balancing the forces to prevent the formation of diagonal concave portions, thereby reducing hydration marks and enhancing surface smoothness and filtering ability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If binding yarns are used to bind the fabric forming a plurality of layers, then the fabric structure is stabilized, but the tension caused by the binding yarns creates concave portions on the upper surface that deteriorate hydration property and form hydration marks
Solution Approach 1:
The patent applies local quality by making the binding yarns have different configurations in different regions. Specifically, the binding yarns are designed to form knuckles at different positions and with different frequencies along the fabric length, creating localized variations in surface topology that prevent systematic hydration mark formation while maintaining overall structural stability.
Solution Approach 2:
The patent employs asymmetry by arranging binding yarns in a non-uniform pattern where knuckles are not evenly distributed. The binding yarns create asymmetric surface profiles with varying knuckle positions and depths, which disrupts the regular diagonal pattern of hydration marks that would otherwise form due to uniform tension distribution.
2Strength
If the density of warps is increased to enhance fabric strength, then the fabric rigidity is improved, but the hydration property deteriorates at high density areas
Solution Approach 1:
The patent segments the fabric structure into distinct regions with different warp densities. By creating zones of varying thread spacing, the fabric maintains high rigidity in areas requiring strength while preserving adequate hydration properties in other regions, preventing uniform deterioration across the entire fabric surface.
3Stability of the object's composition
If binding ratio is enhanced by increasing the number of binding yarns, then the fabric structure is more stable, but portions where hydration property deteriorates are equally aligned forming line patterns that create hydration marks
Solution Approach 1:
The patent introduces asymmetry in the binding yarn arrangement by varying the positions and spacing of knuckles along the binding yarns. This asymmetric configuration ensures that even with multiple binding yarns for enhanced stability, the hydration property deterioration areas are not equally aligned, thereby preventing the formation of linear hydration mark patterns.
Data Source
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AI summary
The object of the present invention is to provide an industrial fabric which exhibits an excellent surface smoothness and an excellent filtering ability, while at the same time reduces the generation of the hydration mark. The industrial fabric of the present invention including at least one upper surface side fabric constituted by upper surface side warps and upper surface side wefts and at least one lower surface side fabric constituted by lower surface side warps and lower surface side wefts, said at least one upper surface side fabric comprising at least one concave binding yarn for pulling down including a portion where a single knuckle is formed and at least one convex binding yarn for pushing up located to be adjacent to said at least one concave binding yarn for pulling down, and said at least one convex binding yarn for pushing up passes under at least one or more said upper surface side warps or said upper surface side wefts woven with a portion where a single knuckle of said at least one concave binding yarn for pulling down is formed and includes at least two or more knuckles which are formed by passing over another upper surface side warp or another upper surface side weft located adjacent to said upper surface side warps or said upper surface side wefts.