Electrostatic Developer Resin Coating for Transfer and Cleaning
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Solution Overview
Problem
Electrostatic latent image developers with silicone oil-treated inorganic particles face challenges in maintaining transferability to transfer members with concavities and convexities while ensuring cleaning properties and charge stability over time.
Innovation Solution
An electrostatic latent image developer comprising toner base particles and a carrier with silicone oil-treated silica and titanium oxide as external additives, where the titanium oxide is present in a trace amount and the carrier has a resin coating layer formed from an alicyclic (meth)acrylic acid ester, optimizing the distribution and adhesion of silica particles for improved transferability and cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silicone oil-treated inorganic particles are used in toner, then cleaning property is improved, but transferability to transfer member having concavities and convexities is decreased
Solution Approach 1:
The patent changes the chemical composition parameters of the resin coating layer by incorporating a specific alicyclic (meth)acrylic acid ester unit, which modifies the surface properties to balance cleaning effectiveness with transferability to complex surfaces
Solution Approach 2:
The patent uses a composite structure combining silicone oil-treated inorganic particles with a specially formulated resin coating layer containing alicyclic (meth)acrylic acid ester, creating a multi-component system that achieves both cleaning property and transferability
2Manufacturing precision
If silicone oil is contained in toner to improve transferability, then transferability is improved, but charge stability deteriorates
Solution Approach 1:
The patent controls the concentration and type of silicone oil in combination with the alicyclic (meth)acrylic acid ester resin, optimizing the balance between transferability and charge stability by adjusting compositional parameters
Solution Approach 2:
The resin coating layer acts as an intermediary between the silicone oil-treated particles and the toner matrix, mediating the interaction to maintain charge stability while preserving transferability benefits
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 enhances transferability to complex surfaces, maintains cleaning efficiency, and stabilizes charge, preventing silica aggregation and uneven distribution, thus reducing defects in image transfer and extending the lifespan of imaging components.
Implementation Method 1
a carrier, wherein the external additive contains silicone oil-treated silica and titanium oxide
Implementation Method 2
silicone oil exhibits sufficient hydrophobicity and has low surface energy. Thus, when silicone oil is contained in a toner, excellent transferability can be imparted to the toner
Implementation Method 3
the resin coating layer has a constituent unit formed from an alicyclic (meth)acrylic acid ester
Data Source
AI summary
The disclosure concerns an electrostatic latent image developer including: a toner having toner base particles and an external additive; and a carrier, wherein the external additive contains silicone oil-treated silica and titanium oxide, Net intensity of titanium (Ti) in the toner to be measured by X-ray fluorescence analysis is 0.5 to 5 kcps, the carrier has a resin coating layer coating core material particles, and the resin coating layer has a constituent unit formed from an alicyclic (meth)acrylic acid ester.