TONER
To provide a toner having excellent low-temperature fixability, maintainability and crushability (productivity).SOLUTION: A toner contains at least a binder resin, a colorant and a release agent. The binder resin is at least three kinds of polyester-based resins composed of: a low molecular weight r...
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Main Author | |
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Format | Patent |
Language | English Japanese |
Published |
15.12.2022
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Subjects | |
Online Access | Get full text |
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Summary: | To provide a toner having excellent low-temperature fixability, maintainability and crushability (productivity).SOLUTION: A toner contains at least a binder resin, a colorant and a release agent. The binder resin is at least three kinds of polyester-based resins composed of: a low molecular weight resin A having a molecular weight distribution of 75% or more within a mass molecular weight range of 1×103 to 1×104, and a viscosity of 1×105 Pa s or less at 80°C when measured with a flow tester; a medium molecular weight resin B having a molecular weight distribution of 20% or more within a mass molecular weight range of 1×104 to 1×105, and a main peak within a mass molecular weight range of 1×103 to 1×104; and a high molecular weight resin C having a molecular weight distribution of 5% or more in a mass molecular weight range of 1×105 or more.SELECTED DRAWING: None
【課題】良好な低温定着性、保存性および粉砕性(生産性)を有するトナーを提供することを課題とする。【解決手段】結着樹脂、着色剤および離型剤を少なくとも含み、前記結着樹脂が、分子量分布で質量分子量1×103~1×104の範囲に75%以上分布しかつフローテスター測定時に80℃のとき1×105Pa・s以下の粘度を有する低分子量の樹脂A、分子量分布で質量分子量1×104~1×105の範囲に20%以上分布しかつ質量分子量1×103~1×104の範囲にメインピークを有する中分子量の樹脂B、および分子量分布で質量分子量1×105以上に5%以上分布を有する高分子量の樹脂Cからなる少なくとも3種のポリエステル系樹脂であることを特徴とするトナーにより、上記の課題を解決する。【選択図】なし |
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Bibliography: | Application Number: JP20210093789 |