Metal-Crosslinked Toner for Offset Resistance and Color Reproducibility
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Solution Overview
Problem
Conventional toner methods fail to achieve sufficient offset resistance and color reproducibility.
Innovation Solution
A toner comprising a binding resin and a metal crosslinking agent that forms metal crosslinking with the binding resin, with a measurement curve of storage elastic modulus G′ having a maximum value in a range of 100° C. or more.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods (introducing crystalline resin or adjusting molar ratio) are used to improve offset resistance, then offset resistance is improved, but color reproducibility becomes insufficient
Solution Approach 1:
The invention changes the physical-chemical parameters of the binding resin by controlling its glass transition temperature (Tg) to be 40°C or higher and storage elastic modulus G′ at 50°C to be 100 Pa or higher. This parameter optimization allows the toner to achieve both excellent offset resistance and color reproducibility, resolving the contradiction between these two properties that plagues conventional methods.
Solution Approach 2:
The invention uses a composite binding resin system that combines specific resin components with controlled molecular structure and composition. By creating a composite material with optimized Tg and G′ properties, the toner achieves simultaneous improvement in offset resistance and color reproducibility, overcoming the limitations of single-resin approaches.
2Temperature
If crystalline resin is introduced into binding resin to improve low-temperature fixing property, then low-temperature fixing is improved, but offset resistance and color reproducibility become insufficient
Solution Approach 1:
Instead of relying on crystalline resin introduction, the invention optimizes the glass transition temperature (Tg) to 40°C or higher and storage elastic modulus G′ at 50°C to 100 Pa or higher. This parameter optimization achieves low-temperature fixing capability while simultaneously maintaining excellent offset resistance and color reproducibility.
3Reliability
If polyester resin composition is adjusted to improve hot offset performance, then hot offset performance is improved, but color reproducibility becomes insufficient
Solution Approach 1:
The invention optimizes the storage elastic modulus G′ at 50°C to be 100 Pa or higher and controls the glass transition temperature Tg to be 40°C or higher. These parameter changes achieve excellent hot offset performance while simultaneously ensuring superior color reproducibility, resolving the contradiction that limits conventional polyester resin adjustments.
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 offset resistance and color reproducibility.
Implementation Method 1
a metal crosslinking agent that forms metal crosslinking with the binding resin
Implementation Method 2
a measurement curve of a storage elastic modulus G′ in a dynamic viscoelasticity measurement has a maximum value in a range of 100° C. or more
Data Source
AI summary
A toner includes a binding resin; and a metal crosslinking agent that forms a metal crosslinking with the binding resin. A measurement curve of a storage elastic modulus G′ in a dynamic viscoelasticity measurement has a maximum value in a range of 100° C. or more.