Conductive Composite Paste for Flexible, Leak-Resistant Conductivity
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Solution Overview
Problem
Conductive composites face challenges in achieving sufficient conductivity without rigidity, leakage of metal from the polymer matrix, and limited operating temperature range, making them unsuitable for various applications.
Innovation Solution
A conductive composite comprising a polymer, a low melting conductor (melting below 60°C) and a compatibilizing agent, often in the form of a paste, which provides conductivity without rigidity and enhances viscosity to prevent leakage, allowing for elastomeric properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional blending methods are used to create conductive master batches, then processing is simplified, but the polymer and conductor remain poorly compatible resulting in non-uniform distribution and aggregation
Solution Approach 1:
The patent employs a compatibilizing agent as an intermediary substance between the polymer and conductor. This compatibilizer has affinity for both materials, acting as a mediator that improves interfacial adhesion and promotes uniform distribution of the conductor within the polymer matrix, thereby resolving the compatibility issue without requiring complex processing equipment
Solution Approach 2:
The invention creates a ternary composite system consisting of polymer, conductor, and compatibilizing agent. This composite approach leverages the synergistic effects of multiple materials to achieve both good distribution uniformity and maintained processability, transforming the binary incompatible system into a compatible tri-component composite
2Ease of manufacture
If conductive master batches are prepared in advance, then downstream processing is simplified, but the multi-step process increases overall manufacturing complexity and cost
Solution Approach 1:
The patent merges the compatibilization function into the existing master batch preparation process by incorporating the compatibilizing agent during the same extrusion step. This consolidation eliminates the need for separate compatibilization steps while maintaining the benefits of pre-prepared conductive master batches, thereby reducing overall process complexity
3Reliability
If high concentrations of conductor are used to achieve desired conductivity, then conductive properties improve, but viscosity increases and processability deteriorates
Solution Approach 1:
The compatibilizing agent acts as a lubricating intermediary between conductor particles and polymer chains, reducing interfacial friction and preventing agglomeration even at high conductor concentrations. This allows the formulation to maintain low viscosity and good processability while achieving the desired conductive properties through higher filler loading
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 composite achieves high electrical conductivity with elastomeric properties, suitable for applications requiring flexibility and wide temperature ranges, while preventing conductor leakage and maintaining conductivity over time.
Implementation Method 1
conductive composites comprising a polymer, a conductor selected from metals and metal alloys
Data Source
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AI summary
Disclosed are conductive composites comprising a polymer, a conductor selected from metals and metal alloys, a compatibilizing agent, and an optional thickening agent.