Electrostatic image developing toner

The toner formulation with copper particles and an alkyl perchlorate salt of an organic amine addresses the challenge of achieving antibacterial properties and fogging suppression, maintaining charge stability and performance.

JP2025102130APending Publication Date: 2025-07-08KAO CORP
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Patent Information

Application Number
JP2023219385
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-12-26
Publication Date
2025-07-08

AI Technical Summary

Technical Problem

Existing electrostatic charge image developing toners face challenges in achieving both antibacterial properties and fogging suppression, as incorporating large amounts of antibacterial materials like metals or quaternary ammonium salts can affect conductivity and chargeability, leading to decreased performance.

Method used

The toner formulation includes copper particles and an alkyl perchlorate salt of an organic amine, with specific mass ratios, to provide antibacterial properties while maintaining charge stability and preventing fogging.

Benefits of technology

The toner effectively balances antibacterial efficacy with fogging suppression, ensuring both properties are achieved without significant impact on chargeability.

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Abstract

To provide an electrostatic image developing toner that offers a superior antibacterial property and suppresses fogging.SOLUTION: An electrostatic image developing toner is provided, containing a binder resin, copper particles, and an alkyl perchlorate salt of an organic amine, where the content of the copper particles is 0.5 to 6.5 pts.mass, inclusive, per 100 pts.mass of the binder resin, and the content of the alkyl perchlorate salt of the organic amine is 0.25 to 1.5 pts.mass, inclusive, per 100 pts.mass of the binder resin.SELECTED DRAWING: None
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Citation Information

Patent Citations

  • Dry toner for image forming device

    JP1996314179A

  • Transparent toner, coating method using the toner, image body, and electrophotographic image forming device

    JP2003241414A

  • Electrophotographic toner containing antimicrobial agent

    JP2004093784A