TONER FOR ELECTROSTATIC LATENT IMAGE DEVELOPMENT

• Main Authors: HIRANO SHIRO, HARUKI HIDEHITO, FURUKAWA JUNICHI, FUJISAKI TATSUYA, ONISHI JUNYA
• Format: Patent
• Language: English; Japanese
• Published: 13.10.2016
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

PROBLEM TO BE SOLVED: To provide a toner for electrostatic latent image development that enables stable continuous printing where a variation in difference in glossiness is less between the front and rear faces of a single sheet and between sheets at low temperature.SOLUTION: A toner for electrostatic latent image development of the present invention contains toner particles formed at least of a colorant, a binder resin, a mold release agent, and a crystalline polyester resin, where the binder resin contains a styrene acrylic resin; the value of storage elastic modulus G', the difference (X) between the maximum value and minimum value of the storage elastic modulus G', and the difference (Y) between the maximum value and minimum value of loss elastic modulus G" within a range from 140 to 180°C each satisfy the following conditional expressions: conditional expression (1): 1.0×10≤G'≤1.0×10; conditional expression (2): 0≤X≤3.0×10; conditional expression (3): 0≤Y≤6.0×10.SELECTED DRAWING: None 【課題】本発明の課題は、低温で、同一用紙での表裏及び用紙間での光沢度差のバラつきが少ない安定した連続プリントが行える静電潜像現像用トナーを提供することである。【解決手段】本発明の静電潜像現像用トナーは、少なくとも着色剤、結着樹脂、離型剤及び結晶性ポリエステル樹脂からなるトナー粒子を含有する静電潜像現像用トナーであって、前記結着樹脂が、スチレン・アクリル樹脂を含有し、１４０〜１８０℃の範囲内における、貯蔵弾性率Ｇ′の値、前記貯蔵弾性率Ｇ′の最高値及び最低値の差（Ｘ）、並びに損失弾性率Ｇ″の最高値及び最低値の差（Ｙ）が、それぞれ下記の条件式を満たすことを特徴とする。条件式（１）：１．０×１０２≦Ｇ′≦１．０×１０３条件式（２）：０≦Ｘ≦３．０×１０２条件式（３）：０≦Ｙ≦６．０×１０２【選択図】なし