Polyester Toner Fog Suppression via Polyhydroxyamine
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Solution Overview
Problem
Existing toners for electrophotography face challenges in suppressing fog formation during high-speed printing, particularly due to toner adherence to the photoreceptor drum and printed materials, which affects image quality.
Innovation Solution
A toner formulation incorporating a polyester resin moiety obtained through polycondensation of an alcohol component, a carboxylic acid component, and a polyhydroxyamine compound, specifically enhancing the interaction between the amine group and polyester to improve fog suppression capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-speed printing is performed, then productivity is improved, but toner adherence to photoreceptor drum and printed matter increases causing fog
Solution Approach 1:
The invention changes the chemical composition parameters of the binder resin by incorporating polyhydroxyamine compounds with specific structural features (formula 1) into the polyester resin system. This chemical parameter modification alters the toner's surface properties and charge characteristics, reducing its tendency to adhere to the photoreceptor drum during high-speed printing operations, thereby suppressing fog formation while maintaining productivity
Solution Approach 2:
The invention creates a composite binder resin system combining polyester resin base components with polyhydroxyamine compound additives. This composite material approach integrates the structural properties of polyester with the functional characteristics of polyhydroxyamine, achieving improved fog suppression capability while maintaining the mechanical and thermal properties required for high-speed printing performance
2Ease of manufacture
If conventional binder resin is used, then manufacturing is simple, but fog suppression capability is insufficient
Solution Approach 1:
The invention modifies the chemical composition parameters of the binder resin by incorporating polyhydroxyamine compounds with specific structural features (formula 1) into the polyester resin system. This chemical parameter modification alters the toner's surface properties and charge characteristics, reducing its tendency to adhere to the photoreceptor drum during high-speed printing operations, thereby suppressing fog formation while maintaining productivity
Solution Approach 2:
The polyhydroxyamine compound acts as an intermediary substance within the binder resin system, mediating the interaction between the polyester resin matrix and the toner particles. This intermediary component modifies the surface characteristics and charge distribution, reducing unwanted adhesion to the photoreceptor drum while maintaining manufacturing processability through standard polymerization methods
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 toner exhibits excellent fog suppression and odor reduction, ensuring better image quality and reduced toner adherence during high-speed printing across varying environmental conditions.
Implementation Method 1
a resin A having at least a polyester moiety obtained through polycondensation of an alcohol component, a carboxylic acid component, and a polyhydroxyamine compound
Implementation Method 2
a sharp charge amount distribution is obtained through mutual interaction between the amine group having a positive polarity in the polyhydroxyamine compound and the polyester having a strong negative polarity
Data Source
AI summary
To provide a toner for electrophotography and a binder resin, exhibiting an excellent fog suppression capability. A toner for electrophotography and a binder resin each containing a resin A having at least a polyester moiety obtained through polycondensation of an alcohol component, a carboxylic acid component, and a polyhydroxyamine compound represented by the formula (1) in an amount of 0.01% by mass or more and 5.0% by mass or less based on the total amount of all the monomer components of the resin A.