Paper Maker Fabric Binder Thread Binding Pattern
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Solution Overview
Problem
Paper maker fabrics with intrinsic binder threads often result in an uneven machine side due to numerous binding points, leading to recesses or dimples, which negatively impact paper fiber retention and sheet quality, causing markings and potential delamination.
Innovation Solution
The binder threads bind with at least two adjacent second threads on the machine side while releasing only one first thread at binding points, maintaining a continuous weave pattern on the paper side, reducing sheet markings, and enhancing fiber support and dewatering homogeneity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If binder threads bind with only one second thread at each binding point, then the weave pattern on the paper side remains continuous, but the connection strength between layers is insufficient
Solution Approach 1:
The binder thread is divided into multiple binding points along its length, where at each binding point it binds with multiple adjacent second threads (at least two) rather than a single thread. This segmentation distributes the binding function across multiple locations and threads, maintaining weave continuity while achieving sufficient connection strength through cumulative binding effects.
Solution Approach 2:
Different portions of the binder thread perform different functions: at binding points, the thread binds with multiple adjacent second threads to provide strong local connection, while between binding points it maintains the continuous weave pattern on the paper side. This local differentiation allows the same thread to simultaneously achieve both weave continuity and layer connection strength.
2Strength
If binder threads bind with multiple adjacent second threads at each binding point, then layer connection strength is improved, but the machine side becomes uneven with recesses or dimples
Solution Approach 1:
The binder thread binds with at least two adjacent second threads at each binding point, which is more than the traditional single-thread binding. This excessive binding action provides redundant connection strength and ensures secure layer attachment while the distributed binding points prevent excessive local deformation that would cause visible dimples.
Solution Approach 2:
The binding configuration allows flexibility in the binder thread's path and tension distribution. By binding with multiple adjacent second threads, the system can dynamically adjust to variations in fabric tension and machine side surface irregularities, maintaining connection strength while accommodating surface uniformity requirements.
3Stability of the object's composition
If numerous binding points are used to ensure strong layer connection, then layer stability is improved, but paper fiber retention and sheet quality deteriorate due to surface irregularities
Solution Approach 1:
The connection between layers is segmented into multiple discrete binding points distributed along the fabric. At each binding point, the binder thread binds with multiple adjacent second threads, providing stable local connection. The segmentation allows the fabric to maintain overall layer stability while minimizing the impact of individual binding points on the paper side surface uniformity.
Data Source
AI summary
A fabric having a first woven fabric layer forming a paper side and made of first threads, and a second woven fabric layer made of second threads, the two woven fabric layers being connected by binder threads belonging to the first woven fabric layer such that at binding points the respective binder thread binds with one first thread on the paper side, then changes to the second woven fabric layer and binds with at least two second threads and then returns to the first woven fabric layer again and binds with a first thread on the paper side, wherein at binding points only one first thread is not bound by the said binder thread.