Electrostatic Toner VOC Reduction via Stripping
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Solution Overview
Problem
Conventional electrophotographic toner production methods using chemical processes result in higher residual volatile organic compounds (VOCs), leading to machine contamination, odor issues, and reduced system lifespan, particularly in high-speed printing environments.
Innovation Solution
Development of an electrostatic latent image developing toner with specific VOC component ratios, where surface area values for 1-butanol, ethylbenzene, styrene, butyl propionate, cumene, benzaldehyde, and propylbenzene are controlled using gas chromatography and multivariate analysis to minimize odor levels, achieved through a stripping process during toner production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If chemical production methods (emulsion polymerization aggregation or suspension polymerization) are used to produce toner at temperatures no higher than 100°C, then manufacturing precision of toner particle size and structure is improved, but quantity of residual volatile organic compounds increases
Solution Approach 1:
The patent applies parameter changes by carefully controlling the composition ratios of monomers (styrene 30-70 wt%, butyl acrylate 10-40 wt%, methyl methacrylate 5-20 wt%) and additives in the toner formulation. By adjusting these chemical parameters and their proportions, the toner achieves desired particle properties while minimizing VOC emissions through optimized polymerization reactions.
Solution Approach 2:
The patent uses composite materials by creating a multi-component toner system comprising polymer particles formed from multiple monomers (styrene, butyl acrylate, methyl methacrylate), colorants, and functional additives. This composite structure allows optimization of both particle formation precision and VOC reduction, as each component contributes specific properties to the overall toner performance.
2Object-generated harmful factors
If conventional mix-and-grind methods are used with melt mixing at high temperatures of at least 100°C, then quantity of residual volatile organic compounds is reduced, but manufacturing precision of toner particle size and structure deteriorates
Solution Approach 1:
The patent applies preliminary action by performing emulsion polymerization or suspension polymerization to form pre-formed polymer particles with controlled size and structure before final toner assembly. This preliminary particle formation step occurs at lower temperatures (≤100°C) and establishes the fundamental particle characteristics, avoiding the need for high-temperature melt mixing that would compromise particle precision.
3Productivity
If high-speed electrophotographic systems operating at high temperatures are used, then productivity is improved, but machine contamination and system lifespan are reduced due to VOC contamination
Solution Approach 1:
The patent converts the potential harm of VOC generation into a benefit by selecting monomers and additives that, when polymerized, create a toner matrix that actually suppresses VOC emissions during operation. The polymerization process transforms volatile monomers into a stable polymer structure that minimizes subsequent VOC release, allowing high-speed operation without contamination problems.
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
Significantly reduces unpleasant odors and machine contamination by limiting VOC emissions, improving the operating environment and extending system lifespan.
Implementation Method 1
gas chromatographic analysis of the volatile gas components generated upon heating the toner
Implementation Method 2
the volatile gas components generated upon heating the toner
Data Source
AI summary
A method of producing an electrostatic latent image developing toner includes: preparing a resin particle dispersion by polymerizing, in a water-based solvent, a polymerizable monomer that comprises a polymerizable monomer comprising a vinyl-based double bond; extracting a liquid from the resin particle dispersion by heating; mixing the distilled resin particle dispersion with a colorant particle dispersion prepared by dispersing a colorant; and aggregating the resin particles, the pigment particles and a release agent particles to form aggregate particles, and then conducting heating to fuse the aggregate particles.