Conductive Resin Composites with Monosized Shaped Particles
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Solution Overview
Problem
Existing electrically conductive articles with wide size distributions of spherical particles are not optimally utilized for electrical conductivity and have suboptimal long-term electrical and adhesive performance due to inefficient particle loading and size constraints.
Innovation Solution
The use of monosized, precision-shaped particles with intersecting surfaces at specific angles distributed within a resin to form a composite, where each particle's height is aligned within the composite's thickness, enhancing electrical conductivity and adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If coated sphere shaped particles with wide particle size distribution are used, then the material can be easily manufactured, but most particles are not optimally utilized for electrical conductivity and long term electrical and adhesive performance is not maximized
Solution Approach 1:
The patent changes the particle size parameter from a wide distribution to a monosized distribution with specific size ranges (e.g., 10-20 μm, 20-30 μm). This parameter change ensures optimal particle utilization for electrical conductivity while maintaining manufacturing feasibility through controlled synthesis processes.
Solution Approach 2:
The patent applies local quality by giving particles specific geometric shapes (squares, triangles, hexagons, octagons) with defined internal angles (45°, 60°, 90°, 120°, 135°) rather than uniform spherical shapes. This localized geometric optimization enhances electrical conductivity pathways while maintaining ease of manufacture through standardized molding processes.
2Ease of manufacture
If coated sphere shaped particles with wide particle size distribution are used, then the material can be easily manufactured, but long term adhesive performance is not maximized
Solution Approach 1:
The patent changes the particle size parameter to a narrow monosized distribution with specific size ranges. This parameter change improves long-term adhesive performance by ensuring uniform stress distribution and optimal contact area, while standardized geometric shapes maintain ease of manufacture through consistent molding processes.
Solution Approach 2:
The patent applies local quality by designing particles with specific geometric features (sharp corners, defined edges, internal angles) that enhance mechanical interlocking and adhesion. These localized geometric optimizations improve adhesive performance while standardized shapes maintain manufacturing simplicity.
3Reliability
If higher filler loading level is used to improve electrical conductivity, then electrical performance improves, but particle utilization efficiency decreases and manufacturing complexity increases
Solution Approach 1:
The patent changes the particle size parameter to a narrow monosized distribution with optimized size ranges. This parameter change improves particle utilization efficiency, allowing lower filler loading levels (reducing manufacturing complexity) while maintaining or enhancing electrical conductivity through optimized particle packing and contact pathways.
Solution Approach 2:
The patent applies local quality by using geometric shapes with specific internal angles (45°, 60°, 90°, 120°, 135°) that enhance electrical contact efficiency. This localized geometric optimization improves conductivity at lower filler loadings, reducing manufacturing complexity compared to using higher loadings of spherical particles.
Data Source
AI summary
Electrically conductive articles are provided, including a composite including (a) a resin, and (b) electrically conductive shaped particles distributed in the resin, the particles having a monosized distribution. Each particle has a shape including at least a first surface and a second surface intersecting the first surface at an angle a between about 5 degrees and about 150 degrees. The composite has a thickness and often each of the electrically conductive shaped particles distributed in the resin is oriented within the resin such that the particle does not extend beyond the thickness of the composite. A method for making an electrically conductive article is also provided, including (a) providing electrically conductive shaped particles having a monosized distribution, and (b) distributing the particles into a resin to form a composite.