公开(公告)号：US20150086919A1

公开(公告)日：2015-03-26

申请号：US14488348

申请日：2014-09-17

Applicant: Konica Minolta, Inc.

Inventor： Naoki YOSHIE ,  Keiichiro HIGASHI

IPC: G03G9/13

CPC classification number: G03G9/132 ,  G03G9/0821 ,  G03G9/09392 ,  G03G9/122

Abstract: A resin in a liquid developer contains 80 mass % or more of a urethane-modified polyester resin. A component derived from a polyester resin contains a constitutional unit derived from an acid component and a constitutional unit derived from an alcohol component. A ratio of a constitutional unit derived from an aliphatic monomer occupied in the constitutional unit derived from the acid component and the constitutional unit derived from the alcohol component is not lower than 90 mass %. Relation of |Tm1−Tm5|≧20° C. (70° C.≦Tm1≦170° C., 60° C.≦Tm5≦120° C.) is satisfied, where Tm1 (° C.) represents a softening temperature T1/2 of toner particles measured with a flow tester under a load of 1 kg and Tm5 (° C.) represents a softening temperature T1/2 of toner particles measured with a flow tester under a load of 5 kg.

Abstract translation: 液体显影剂中的树脂含有80质量％以上的氨基甲酸酯改性聚酯树脂。 衍生自聚酯树脂的组分含有由酸组分衍生的结构单元和衍生自醇组分的结构单元。 来源于酸成分的结构单元中所含的脂肪族单体的结构单元与来自醇成分的结构单元的比例为90质量％以上。 满足| Tm1-Tm5 |≥20℃（70℃＆lt; NlE; Tm1＆nlE; 170℃，60℃＆lt; Tm;＆lt; 120℃）的关系，其中Tm1（℃） 用流量计在1kg负荷和Tm5（℃）下测量的调色剂颗粒的软化温度T1 / 2表示用流动测试仪在5kg负荷下测量的调色剂颗粒的软化温度T1 / 2。