TONER AND IMAGE FORMING METHOD

PROBLEM TO BE SOLVED: To provide a toner that has high fluidity while suppressing contamination of members during a long-term use.SOLUTION: There is provided a toner containing toner particles having a core-shell structure that contains polyester resin A in a shell part, and inorganic fine particles...

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Main Authors HOTTA YOJIRO, MIZUGUCHI TAKUYA, KENMOKU TAKASHI, UNNO TOMOHIRO, NOJI SHINTARO, GYE DAE SI
Format Patent
LanguageEnglish
Japanese
Published 08.08.2016
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To provide a toner that has high fluidity while suppressing contamination of members during a long-term use.SOLUTION: There is provided a toner containing toner particles having a core-shell structure that contains polyester resin A in a shell part, and inorganic fine particles A, where the polyester resin A contains an isosorbide unit represented by the formula (1) in an amount of 0.10 mol% or more and 20.00 mol% or less; the content of the polyester resin A is 1.0 part by mass or more and 20.0 parts by mass or less based on 100.0 parts by mass of a binder resin; the inorganic fine particles A has an average value of density measured with a scanning electron microscope (SEM) of 0.40 or more and 0.80 or less.SELECTED DRAWING: None 【課題】長期使用時の部材汚染を抑制しつつ、高い流動性を有するトナーを提供する。【解決手段】シェル部にポリエステル樹脂Ａを含有するコアシェル構造のトナー粒子及び無機微粒子Ａを含有するトナーであって、前記ポリエステル樹脂Ａは、式（１）で示されるイソソルビドユニットを０．１０ｍｏｌ％以上、２０．００ｍｏｌ％以下含有し、前記ポリエステル樹脂Ａの含有量が、結着樹脂１００．０質量部に対して、１．０質量部以上２０．０質量部以下であり、前記無機微粒子Ａは、走査型電子顕微鏡（ＳＥＭ）により観察される稠密度の平均値が０．４０以上０．８０以下であることを特徴とするトナー。【選択図】なし
Bibliography:Application Number: JP20150016037