Crystalline Resin Toner With Modulus-Controlled Organic Silicon Particles
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Solution Overview
Problem
Existing toners using crystalline resins as a main component face issues with external additive burial, leading to decreased transferability over time, despite achieving low-temperature fusibility and heat-resistant preservability.
Innovation Solution
A toner formulation with a binder resin containing a crystalline resin and organic silicon polymer particles, where the Young's modulus ratio (TE and SiE) is controlled within specific ranges (800≤TE≤2500 and 1.5≤SiE/TE≤10.0) to prevent additive burial, enhancing both low-temperature fusibility and transferability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a crystalline resin is used as the main component of the binder resin to achieve low-temperature fusibility, then fusibility is improved, but transferability decreases due to external additive burial
Solution Approach 1:
The invention changes the physical parameter of the external additive by selecting organic silicon polymer particles with a specific Young's modulus range (0.1 to 1.0 GPa) that matches the crystalline resin matrix. This parameter matching prevents the additive from being buried during prolonged image output, thereby maintaining transferability while preserving low-temperature fusibility through the crystalline resin structure.
Solution Approach 2:
The invention creates a composite material system combining crystalline resin (for low-temperature fusibility) with organic silicon polymer particles (for maintained transferability). The composite structure allows the crystalline resin to provide sharp melting properties while the specifically selected organic silicon polymer particles resist burial, thus achieving both low-temperature fusibility and sustained transferability simultaneously.
2Strength
If the Young's modulus of the external additive is too low relative to the toner particle, then the additive is easily buried, but if it is too high, then fusibility is compromised
Solution Approach 1:
The invention optimizes the Young's modulus parameter of the external additive to fall within a specific range (0.1 to 1.0 GPa) that is lower than the toner particle's Young's modulus (1.5 to 10.0 times lower). This parameter optimization ensures the additive remains resistant to burial during prolonged use while maintaining compatibility with the crystalline resin's low-temperature fusibility characteristics.
Data Source
AI summary
Provided is a toner comprising: a toner particle containing a binder resin; and an organic silicon polymer particle on a surface of the toner particle, wherein the binder resin contains a crystalline resin, and when the toner particle is pelletized and a Young's modulus of the toner measured in a micro compression test at 25° C. is represented by TE (MPa) and when one organic silicon polymer particle is separated from the toner and a Young's modulus of the one organic silicon polymer particle measured in a micro compression test at 25° C. is represented by SiE (MPa), TE and SiE satisfies 800≤TE≤2500 and 1.5≤SiE/TE≤10.0.