Industrial Fabric Layer Binding for Surface and Air Permeability
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Solution Overview
Problem
Existing industrial fabrics for paper machines face a challenge in maintaining surface properties and air permeability while ensuring adequate binding force, as increasing binding yarns can lead to a decrease in these properties.
Innovation Solution
The industrial fabric is designed with an upper and lower surface side fabric bound by interweaving warps and wefts, where binding warps and wefts are strategically positioned to avoid disrupting the surface texture, with binding warps and wefts not included in the normal weaving pattern, maintaining the integrity of the fabric's structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If binding yarns are increased to enhance bonding force, then binding force is improved, but surface properties and air permeability deteriorate
Solution Approach 1:
The fabric is divided into distinct functional components: binding yarns for bonding force, and surface yarns for maintaining surface properties and air permeability. By segmenting the yarn functions, the patent resolves the contradiction by allowing each component to optimize its specific performance without compromising the other.
Solution Approach 2:
Different regions of the fabric are assigned different yarn configurations. The binding yarns are strategically positioned at specific locations to provide bonding force where needed, while surface yarns are distributed to maintain surface properties and air permeability in critical areas, creating local quality variations that resolve the overall contradiction.
2Strength
If binding yarns are increased to enhance bonding force, then binding force is improved, but air permeability deteriorates
Solution Approach 1:
The fabric structure is segmented into binding yarns and air permeability-maintaining yarns. The binding yarns provide bonding force while the other yarns create pathways for air flow, resolving the contradiction between binding force and air permeability through functional separation.
Solution Approach 2:
The fabric functions as a composite structure combining different yarn types with complementary properties. The binding yarns provide structural bonding while the surface yarns maintain porosity and air permeability, creating a composite material that simultaneously achieves both binding force and air permeability.
Data Source
AI summary
The wefts include: binding wefts that bind the upper surface side fabric and the lower surface side fabric; upper surface side wefts that form a part of the upper surface side fabric; and lower surface side wefts that form a part of the lower surface side fabric. The warps include: binding warps that bind the upper surface side fabric and the lower surface side fabric; upper surface side warps that are interwoven with the upper surface side wefts without being interwoven with the lower surface side wefts so as to form a part of the upper surface side fabric; and lower surface side warps that are interwoven with the lower surface side wefts without being interwoven with the upper surface side wefts so as to form a part of the lower surface side fabric.