Two-Layer Industrial Fabric Warp Binding Design
Solution Overview
Problem
Existing industrial fabrics, particularly papermaking wires, face challenges in simultaneously achieving wear resistance, surface property, rigidity, running stability, and water drainage properties, which are essential for maintaining quality and longevity in severe environments.
Innovation Solution
A two-layer industrial fabric design featuring warp binding yarns with alternating designs on the upper and lower surfaces, where the warp binding yarns form pairs that cooperate to create distinct surface designs, including bilaterally symmetrical and mirror-image patterns, to enhance binding strength and prevent wire marks, while allowing for long crimp formation and zigzag arrangements that improve wear resistance and rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a large-diameter yarn is used as the lower side weft to increase wear resistance, then wear resistance is improved, but the lower side weft becomes unpliable and warps protrude and wear away
Solution Approach 1:
The patent applies different yarn diameters to different locations in the fabric structure. Small-diameter yarns are used for the lower side weft where pliability is needed, while large-diameter yarns are used for the upper side weft where wear resistance is prioritized. This local differentiation allows each region to have optimized properties without compromising the other.
Solution Approach 2:
The patent transitions from a single-layer fabric to a two-layer fabric structure with warp binding yarns. This dimensional change creates separate upper and lower surfaces that can have different yarn configurations, allowing the lower side to use small-diameter pliable yarns while the upper side uses large-diameter wear-resistant yarns.
2Productivity
If a short weft crimp design is used corresponding to two lower side warps, then water drainage property is improved, but wear resistance deteriorates
Solution Approach 1:
The patent creates a two-layer fabric structure that separates the functions of water drainage and wear resistance into different layers. The upper layer can have short crimp designs optimized for water drainage, while the lower layer uses long crimp designs optimized for wear resistance, eliminating the need to compromise either property in a single layer.
Solution Approach 2:
Different crimp lengths are applied to different regions of the fabric. The upper side fabric can have short crimps for efficient water drainage, while the lower side fabric has long crimps for enhanced wear resistance. Each region's crimp length is locally optimized for its specific functional requirements.
3Manufacturing precision
If the fabric structure is simplified to use warp binding yarns only, then surface property is improved, but the ability to achieve multiple properties simultaneously deteriorates
Solution Approach 1:
The patent introduces a two-layer structure with upper and lower sides that can have different yarn configurations, crimp lengths, and weave patterns. This dimensional expansion allows the fabric to simultaneously achieve excellent surface property from the upper layer while the lower layer provides wear resistance, rigidity, and other mechanical properties.
Solution Approach 2:
The two-layer fabric structure with warp binding yarns serves multiple functions simultaneously: the upper layer provides excellent surface property for paper quality, the lower layer provides wear resistance and rigidity for long-term running, and the intermediate binding layer provides binding strength. Each layer is optimized for its specific function while working together as a unified structure.
Data Source
AI summary
An industrial two-layer fabric includes pairs of warps obtained by stacking an upper side warp to be woven with an upper side weft and a lower side warp to be woven with a lower side weft and having, as at least one of the pairs. A pair of binding warps includes warp binding yarns to be woven with both an upper side weft and a lower side weft constitutes a portion of an upper side surface design and a portion of a lower side surface design. In a lower side surface warp design formed by the weaving of a warp binding yarn and a lower side warp with a lower side weft, two or three designs are different from each other, and a weft passes over two warps adjacent to each other and then passes under a plurality of warps to form a long crimp on the lower side surface.