公开(公告)号：US09964875B2

公开(公告)日：2018-05-08

申请号：US15317014

申请日：2015-07-14

Applicant: S-PRINTING SOLUTION CO., LTD.

Inventor： Se-young Yoon ,  Hae-ree Joo ,  Sung-jun Cho

IPC: G03G9/08 ,  G03G9/107 ,  G03G9/087 ,  G03G9/09

CPC classification number: G03G9/0825 ,  G03G9/0819 ,  G03G9/0821 ,  G03G9/08755 ,  G03G9/08782 ,  G03G9/0904 ,  G03G9/09708 ,  G03G9/09725 ,  G03G9/10 ,  G03G9/1075

Abstract: Disclosed is a toner for developing an electrostatic latent image, the toner comprising a plurality of toner particles, each toner particle includes: a core particle that contains a binding resin, a coloring agent, and a releasing agent; and an external additive attached to the surface of the core particle, wherein the toner has two endothermic peaks in a heat curve, which is obtained at the time of the secondary temperature rise in differential scanning calorimetry of the toner, and a stepped endothermic curve; and first and second melting temperatures, which are determined to be the locations of vertices of the two endothermic peaks, a glass transition temperature, which is determined to be the midpoint of a linear portion of the stepped endothermic curve, and first and second heat of melting, which are determined to be the areas of the two endothermic peaks, satisfy the condition set forth herein.