TONER AND METHOD FOR PRODUCING TONER

• Main Authors: KOBORI NAOKUNI, KOMATSU NOZOMI, HASHIMOTO TAKESHI, HAMA MASAYUKI, SUGANO ICHIRO, FUJIKAWA HIROYUKI
• Format: Patent
• Language: English; Japanese
• Published: 28.09.2017
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

PROBLEM TO BE SOLVED: To provide a toner which can be adopted to a high-speed development system and is excellent in low-temperature fixability, heat-resistant storage property, hot-offset resistance and development durability.SOLUTION: There is provided a toner having a crystalline polyester resin A, a crystalline polyester resin B and an amorphous polyester resin C, the total of contents of the crystalline polyester resin A and the crystalline polyester resin B is 2 pts.mass or more and 20 pts.mass or less with respect to 100 pts.mass of the amorphous polyester resin C, the crystalline polyester resin A contains crystalline polyester that is obtained by condensation polymerization of a diol component containing aliphatic diol as a main component and a dicarboxylic acid component containing an aliphatic dicarboxylic acid compound as a main component and has 6 to 18 carbon atoms, as a main component, and the crystalline polyester resin B crystalline polyester that is obtained by condensation polymerization of a diol component containing aliphatic diol as a main component and a dicarboxylic acid component containing an aliphatic dicarboxylic acid compound as a main component and has 24 to 60 carbon atoms, as a main component.SELECTED DRAWING: None 【課題】高速現像システムに適応可能な、低温定着性、耐熱保存性、耐ホットオフセット性及び現像耐久性に優れたトナーを提供する。【解決手段】結晶性ポリエステル樹脂Ａ、結晶性ポリエステル樹脂Ｂ、及び非晶性ポリエステル樹脂Ｃを有するトナーであって前記結晶性ポリエステル樹脂Ａ及び前記結晶性ポリエステル樹脂Ｂの含有量の合計が、前記非晶質ポリエステル樹脂Ｃ１００質量部に対し、２質量部以上２０質量部以下であり、前記結晶性ポリエステル樹脂Ａが、脂肪族ジオールを主成分として含むジオール成分と、脂肪族ジカルボン酸化合物を主成分として含むジカルボン酸成分とを縮重合して得られる炭素数６以上１８以下の結晶性ポリエステルを主成分として含有し、前記結晶性ポリエステル樹脂Ｂが、脂肪族ジオールを主成分として含むジオール成分と、脂肪族ジカルボン酸化合物を主成分として含むジカルボン酸成分とを縮重合して得られる炭素数２４以上６０以下の結晶性ポリエステルを主成分として含有する。【選択図】なし