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1. (WO2018079129) TONER FOR ELECTROSTATIC LATENT IMAGE DEVELOPMENT

Pub. No.:    WO/2018/079129    International Application No.:    PCT/JP2017/033476
Publication Date: Fri May 04 01:59:59 CEST 2018 International Filing Date: Sat Sep 16 01:59:59 CEST 2017
IPC: G03G 9/08
G03G 9/087
Applicants: KYOCERA DOCUMENT SOLUTIONS INC.
京セラドキュメントソリューションズ株式会社
Inventors: OKITA Masaki
大喜多 正希
UEMURA Hiroki
上村 裕輝
Title: TONER FOR ELECTROSTATIC LATENT IMAGE DEVELOPMENT
Abstract:
In the present invention, the core of toner particles contains: a crystalline polyester resin (polymer of alcohol/carboxylic acid/styrene monomer/acrylate monomer) having an SP value ((cal/cm3)1/2) of 10-11; an amorphous polyester resin; and a carnauba wax. The shell layer of the toner particles includes a resin film which is mainly composed of an aggregate of resin particles having a glass transition point of 50-100oC (number average degree of circularity: 0.55-0.75). The Ru dyeing rate of the toner particles in a state without external additives is 50-80%. The peak light absorbance intensity near a wave number of 701 cm-1 is 0.0100-0.0250. The surface adsorption force (FA: covered region, FB: exposed region) satisfies "0nN < FA," "50nN ≤ FB ≤ 70nN," and "35nN ≤ FB - FA ≤ 65nN."