POSS-Modified Polyimide Transfer Belt for High-Resolution Imaging
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Solution Overview
Problem
Existing intermediate transfer members in electrostatographic printing face issues with incomplete toner transfer due to charge exchange, leading to low resolution and image deterioration, and are sensitive to humidity and temperature, affecting resistivity and mechanical strength.
Innovation Solution
Development of intermediate transfer members with a polyhedral silsesquioxane modified polyimide layer, where the silsesquioxane is chemically bonded to the polyimide, providing improved resistivity stability and mechanical properties, and eliminating the need for labor-intensive puzzle cut seams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional intermediate transfer members are used, then manufacturing is simpler, but toner transfer is incomplete due to charge exchange, leading to low resolution and image deterioration
Solution Approach 1:
The patent employs a composite material structure consisting of a polyimide base polymer combined with polyhedral silsesquoxane (POSS) molecules. The POSS molecules are chemically grafted to the polyimide chains, creating a hybrid material that exhibits both the mechanical properties of polyimide and the electrical resistance stability of silsesquoxane. This composite structure prevents charge exchange with toner particles, ensuring complete toner transfer and high-resolution imaging while maintaining structural integrity.
2Reliability
If conventional intermediate transfer members are used, then device complexity is lower, but the members are sensitive to humidity and temperature, affecting resistivity and mechanical strength
Solution Approach 1:
The patent employs a composite material structure consisting of a polyimide base polymer combined with polyhedral silsesquoxane (POSS) molecules. The POSS molecules are chemically grafted to the polyimide chains, creating a hybrid material that exhibits both the mechanical properties of polyimide and the electrical resistance stability of silsesquoxane. This composite structure prevents charge exchange with toner particles, ensuring complete toner transfer and high-resolution imaging while maintaining structural integrity.
Solution Approach 2:
The patent modifies the molecular structure parameters of the polyimide by incorporating POSS groups with specific cage structures and siloxane bonds. These structural parameter changes result in material properties that are insensitive to environmental variations in humidity and temperature, maintaining stable resistivity and mechanical strength across different operating conditions.
3Reliability
If polyhedral silsesquioxane modified polyimide is used, then resistivity stability and mechanical properties are improved, but manufacturing process becomes more complex
Solution Approach 1:
The patent incorporates POSS molecules into the polyimide matrix during the polymerization or curing process, before the final product formation. This preliminary incorporation ensures uniform distribution and chemical bonding of POSS to polyimide chains, creating a homogeneous modified structure that delivers consistent dimensional stability and resistivity performance without requiring complex post-processing steps.
Solution Approach 2:
The patent employs a composite material structure consisting of a polyimide base polymer combined with polyhedral silsesquoxane (POSS) molecules. The POSS molecules are chemically grafted to the polyimide chains, creating a hybrid material that exhibits both the mechanical properties of polyimide and the electrical resistance stability of silsesquoxane. This composite structure prevents charge exchange with toner particles, ensuring complete toner transfer and high-resolution imaging while maintaining structural integrity.
4Productivity
If conventional materials are used, then production is faster, but puzzle cut seams are labor-intensive and affect belt continuity
Solution Approach 1:
The patent eliminates the puzzle cut seam joining process by developing a continuous belt manufacturing method. The polyimide-POSS composite material allows for seamless belt construction, removing the need for discrete segment assembly and labor-intensive joining operations, thereby improving production efficiency and belt continuity.
Solution Approach 2:
The patent enables continuous manufacturing of the intermediate transfer belt without interruption for seam joining. The modified polyimide material system allows the belt to be produced as a continuous piece, maintaining uninterrupted production flow and eliminating the discontinuous seam joining operations that previously reduced productivity.
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 solution achieves high transfer efficiency, dimensional stability, and resistance to environmental changes, ensuring complete toner transfer and improved image quality with reduced sensitivity to humidity and temperature.
Implementation Method 1
The POSS amines, POSS alcohols, POSS carboxylic acids, or POSS epoxides react with the carboxylic acid or amine group of the polyamic acid (polyimide precursor) during the imidization, thus chemically bonding or chemically attached to the resulting polyimide
Data Source
AI summary
An intermediate transfer media that includes a single layer of a polyhedral silsesquioxane polyimide, and where the silsesquioxane is attached to the polyimide or a multi layer transfer media that includes a supporting substrate, such as a polyimide, and thereover a polyhedral silsesquioxane modified polyimide, and where the silsesquioxane is attached to the polyimide.