Two-Layer Fabric Warp Binding for Papermaking Wire Surface Quality
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Solution Overview
Problem
Industrial fabrics, particularly papermaking wires, face challenges in achieving excellent surface properties, dehydration efficiency, rigidity, and wear resistance while minimizing wire marks and ensuring long-term performance under severe conditions.
Innovation Solution
A two-layer fabric design featuring an upper surface layer with a warp binding yarn that forms a uniform knuckle pattern, combined with a lower surface layer, enhances breathability and water drainage by allowing diagonal spaces and using warp binding yarns as both binding and surface-forming elements, eliminating the need for additional binding yarns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If two warp binding yarns form a pair and pull an upper surface side weft to the lower side, then binding strength is improved, but a depressed portion forms on the upper side surface causing wire marks on paper
Solution Approach 1:
The invention divides the binding function into three separate warp binding yarns instead of using two yarns that pull together. Each of the three yarns independently binds the upper surface side weft to the lower surface side weft, distributing the binding force and eliminating the concentrated pull that causes depressed portions and wire marks on the fabric surface.
2Strength
If warp binding yarns cross each other adjacently, then binding function is enhanced, but internal space is blocked causing insufficient dehydration
Solution Approach 1:
The invention positions the three warp binding yarns at specific locations within the fabric structure rather than having them cross adjacently. This localized arrangement maintains binding function while preserving internal spaces necessary for water drainage, allowing the fabric to maintain both strength and dehydration efficiency.
3Strength
If additional binding yarns are used to enhance binding strength, then binding function is improved, but fabric design is destroyed and surface property deteriorates
Solution Approach 1:
The three warp binding yarns serve multiple functions simultaneously: they bind the upper surface side weft to the lower surface side weft, form part of the warp design on the upper side surface, and contribute to the overall fabric structure. This multi-functionality eliminates the need for separate binding yarns that would破坏 the fabric design and surface properties.
Data Source
AI summary
In an industrial two-layer fabric, one upper surface side warp and three warp binding yarns are disposed adjacent to each other. Each of the three warp binding yarns appears on the upper side surface in turn and passes over different one or two successive upper surface side wefts. At least one upper surface side weft exists between knuckles formed on the upper side surface by the three warp binding yarns. Adjacent to the upper surface side warp, these three warp binding yarns get together to form on the upper side surface a design which is the same design formed by an upper surface side warp.