CNT Polymer Intermediate Layer for Fuser Thermal Stability
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Solution Overview
Problem
In electrophotographic fusers, the high baking temperatures required for fluoroplastics can cause degradation of silicone rubber layers, leading to non-uniform film formation and defects, as silicone rubber degrades at temperatures below those needed for fluoroplastics to form films effectively.
Innovation Solution
A fuser member with an intermediate layer composed of carbon nanotubes dispersed in a polymer matrix is used, which is applied between the silicone rubber layer and the fluoropolymer surface layer, providing thermal stability and mechanical robustness to protect the underlying layers during high-temperature processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high baking temperatures (over 300°C) are used to form fluoroplastic films, then film formation is effective, but silicone rubber layer degrades
Solution Approach 1:
The fuser member is segmented into multiple functional layers: a resilient silicone rubber layer, an intermediate layer with carbon nanotube-polymer composite, and a fluoroplastic surface release layer. This segmentation allows each layer to be optimized for its specific function and temperature tolerance.
Solution Approach 2:
The intermediate layer containing carbon nanotubes dispersed in a polymer matrix serves as a thermal mediator between the silicone rubber layer and the fluoroplastic surface release layer. It protects the temperature-sensitive silicone rubber from direct exposure to high baking temperatures while enabling effective film formation of the fluoroplastic layer.
2Manufacturing precision
If high baking temperatures are used for fluoroplastics, then uniform film formation is achieved, but film defects occur due to silicone rubber degradation
Solution Approach 1:
The intermediate layer acts as a protective intermediary that shields the silicone rubber layer from high temperatures during fluoroplastic film formation. This prevents degradation-related defects while maintaining uniform film quality.
Solution Approach 2:
The intermediate layer uses a composite material consisting of carbon nanotubes dispersed in a polymer matrix. This composite provides both thermal stability and mechanical robustness, enabling the layer to withstand high temperatures without degrading the underlying silicone rubber.
3Strength
If primer layers are added to facilitate adhesion between silicone rubber and surface release layer, then adhesion is improved, but device complexity increases
Solution Approach 1:
The intermediate layer combines multiple functions into a single integrated structure: it provides thermal protection, mechanical robustness, and adhesion promotion between the silicone rubber layer and the fluoroplastic surface release layer. This merging eliminates the need for separate primer layers while maintaining or improving adhesion.
Solution Approach 2:
The intermediate layer serves multiple functions simultaneously: thermal barrier, mechanical support, and adhesion promoter. This multi-functionality reduces the overall complexity of the fuser member structure compared to using separate specialized layers for each function.
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 intermediate layer enables the fuser member to withstand temperatures of 250°C or higher without defects, ensuring uniform film quality and improved adhesion between layers, thus enhancing thermal stability and mechanical robustness.
Implementation Method 1
The intermediate layer of the fuser member can include a plurality of carbon nanotubes dispersed in a polymer matrix to protect the underlying resilient layer
Implementation Method 2
a composite dispersion that include a plurality of carbon nanotubes and a polymer can be formed and then deposited and cured on a resilient layer
Data Source
AI summary
Exemplary embodiments provide a fuser member containing an intermediate layer and methods for forming the intermediate layer and the fuser member. In one embodiment, the fuser member can include a substrate, a resilient layer, a surface layer and an intermediate layer disposed between the resilient layer (e.g., a silicone rubber layer) and the surface layer (e.g., a fluoroplastic of PFA or PTEE). The intermediate layer can include a CNT/polymer composite containing a plurality of carbon nanotubes in a polymer matrix. The surface layer and the fuser member can thus be treated at a temperature of about 250° C. or higher.