Electrostatic Carrier with Nitrogen Acrylate Resin for Image Density
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In electrophotography, electrostatic charge image developing carriers face challenges in maintaining consistent image density due to variations in temperature and humidity, leading to uneven toner charge and fluidity issues, especially when transitioning from high-temperature high-humidity to low-temperature low-humidity environments.
Innovation Solution
An electrostatic charge image developing carrier with core particles having a BET specific surface area of 0.05 to 0.10 m2/g, coated with a nitrogen-containing (meth)acrylate resin, which enhances charge stability and fluidity, preventing image density unevenness across different environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional carriers are used in electrophotography, then image development can be performed, but image density becomes uneven when environmental conditions (temperature and humidity) change
Solution Approach 1:
The patent applies parameter changes by carefully controlling the BET specific surface area of core particles within a specific range (0.03 to 0.15 m2/g) and selecting resins with specific glass transition temperatures. These parameter optimizations ensure that the carrier maintains stable charge properties and fluidity across varying environmental conditions, preventing image density unevenness
Solution Approach 2:
The patent uses composite materials by combining core particles with specific surface area characteristics and resin coating layers with controlled glass transition temperatures. This composite structure creates a carrier that maintains consistent performance across different temperature and humidity conditions, resolving the contradiction between reliability and environmental adaptability
2Manufacturing precision
If toner and carrier are mixed for development, then electrostatic charge image can be formed, but toner charge becomes uneven due to friction charging variations
Solution Approach 1:
The patent applies parameter changes by optimizing the BET specific surface area of core particles to a specific range (0.03 to 0.15 m2/g). This parameter control reduces excessive friction charging variations during toner-carrier mixing, leading to more uniform toner charge distribution and preventing image density unevenness
3Ease of operation
If carrier fluidity is increased for better mixing, then toner distribution improves, but charge stability decreases
Solution Approach 1:
The patent applies parameter changes by selecting resins with specific glass transition temperatures and controlling the BET specific surface area of core particles. These parameter optimizations balance carrier fluidity for good mixing with charge stability, ensuring consistent performance without excessive fluidity that would compromise charge stability
Solution Approach 2:
The patent applies local quality by creating a resin coating layer with specific properties (glass transition temperature control) on the core particle surface. This localized resin layer provides the necessary fluidity enhancement while maintaining charge stability in the bulk carrier material
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 carrier maintains consistent toner charge and fluidity, preventing image density unevenness even when environmental conditions change, ensuring high-quality image formation in various humidity and temperature settings.
Implementation Method 1
a toner and a carrier are mixed and are frictionally charged to apply a positive or negative charge to the toner
Implementation Method 2
the core particle has a BET specific surface area of from 0.05 m2/g to 0.10 m2/g
Data Source
AI summary
An electrostatic charge image developing carrier contains a core particle and a resin coat layer on a surface of the core particle, wherein the core particle has a BET specific surface area of from 0.05 m2/g to 0.10 m2/g, and the resin coat layer contains a nitrogen-containing (meth)acrylate resin.