Fiber Assembly with Release-Treated Support Sheet
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Solution Overview
Problem
Existing methods for producing fiber assemblies with small line widths suffer from fiber fraying and entanglement when cut into individual pieces, due to the weak adhesive force required to separate the fibers from the support sheet.
Innovation Solution
A fiber assembly is created with a support sheet subjected to a release treatment, featuring a warp yarn group and a weft yarn group with specific line widths and spacings, forming high and low fiber density regions. This pattern allows for controlled cutting to prevent entanglement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fibers with small line width (φ4 μm or less) are used to achieve high arrangement precision, then manufacturing precision is improved, but the fibers become prone to fraying and entanglement when cut into individual pieces
Solution Approach 1:
The support sheet is designed with spatially varying adhesive force distribution. High adhesive force regions are positioned at the ends of fiber groups to prevent fraying during cutting, while low adhesive force regions are positioned at the center to enable clean separation. This local differentiation of adhesive properties allows thin fibers to be handled without entanglement while maintaining arrangement precision.
Solution Approach 2:
The support sheet is divided into multiple regions with different adhesive characteristics: first regions with high adhesive force at the ends, and second regions with low adhesive force at the center. This segmentation allows different cutting behaviors in different areas, preventing overall fiber entanglement by controlling the separation process zone by zone.
2Stability of the object's composition
If strong adhesive force is used to hold fibers on the support sheet, then fiber arrangement stability is improved, but cut fibers become likely to be loosened and entangled when peeled off
Solution Approach 1:
The adhesive force of the support sheet is made non-uniform, with high adhesive force in first regions at the ends and low adhesive force in second regions at the center. This allows the fiber arrangement to be stable during handling and cutting, while enabling clean separation during peeling without entanglement.
Solution Approach 2:
The support sheet structure is segmented into high-adhesive end regions and low-adhesive center regions. During cutting, the high adhesive force at the ends prevents fiber loosening, while the low adhesive force at the center allows controlled separation. During peeling, the low adhesive force regions enable clean detachment without entanglement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The sparse-and-dense pattern in the fiber assembly enables controlled cutting, reducing the likelihood of entanglement in the high-density regions, thus improving the practical usability of the cut fibers.
Implementation Method 1
on a main surface of a support sheet subjected to a release treatment
Implementation Method 2
heating the support sheet, on which the first layer and the second layer are spun, at a temperature equal to or higher than a melting point of the polymer material
Data Source
AI summary
A fiber assembly includes a support sheet, a warp yarn group in which warp yarns including a polymer material are arranged, and a weft yarn group in which weft yarns including a polymer material are arranged. A surface of the support sheet has been subjected to a release treatment. The warp yarn group and the weft yarn group are on the surface of the support sheet. The warp yarn group and the weft yarn group define contact portion regions and non-contact portion regions. In each of the contact portion regions, one of the warp yarns is integrated with one of the weft yarns. Each of the warp yarns and the weft yarns has a line width of 1 μm to 10 μm, inclusive. One of the contact portion regions has a fiber density which is higher than a fiber density of one of the non-contact portion regions.