ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER
To provide an electrostatic charge image developing toner which offers high initial image density and suppresses image blur in a high-temperature, high-humidity environment, and to provide a method of manufacturing the same.SOLUTION: An electrostatic charge image developing toner and a method of man...
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| creator | KONDO HIDEAKI IWADATE HIDEKI |
| description | To provide an electrostatic charge image developing toner which offers high initial image density and suppresses image blur in a high-temperature, high-humidity environment, and to provide a method of manufacturing the same.SOLUTION: An electrostatic charge image developing toner and a method of manufacturing the same are provided, the electrostatic charge image developing toner comprising toner base particles containing a binder resin and colorant and having a circularity in a range of 0.950 to 0.995, inclusive, and an external additive containing silica particles A and silica particles B having different number average particle diameters, where the silica particles A have a greater number average particle diameter than the silica particles B, a BET specific surface area in a range of 70 m2/g to 150 m2/g, inclusive, and a shape index of 2.0 or greater as expressed as a ratio of the number average particle diameter to a BET equivalent particle diameter, and the silica particles B have a shape index of less than 2.0.SELECTED DRAWING: None
【課題】初期画像濃度が高く、高温高湿下での画像カスレが抑制される、静電荷像現像用トナー及びその製造方法に関すること。【解決手段】結着樹脂及び着色剤を含有する、円形度が0.950以上0.995以下のトナー母粒子と、個数平均粒径の異なるシリカ粒子Ａ及びシリカ粒子Ｂを含有する外添剤とを含有する静電荷像現像用トナーであって、前記シリカ粒子Ａが前記シリカ粒子Ｂよりも個数平均粒径が大きく、前記シリカ粒子ＡのＢＥＴ比表面積が70m2/g以上150m2/g以下、個数平均粒径のＢＥＴ換算粒径に対する比で表される形状指数が2.0以上であり、前記シリカ粒子Ｂの形状指数が2.0未満である、静電荷像現像用トナー及びその製造方法。【選択図】なし |
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【課題】初期画像濃度が高く、高温高湿下での画像カスレが抑制される、静電荷像現像用トナー及びその製造方法に関すること。【解決手段】結着樹脂及び着色剤を含有する、円形度が0.950以上0.995以下のトナー母粒子と、個数平均粒径の異なるシリカ粒子Ａ及びシリカ粒子Ｂを含有する外添剤とを含有する静電荷像現像用トナーであって、前記シリカ粒子Ａが前記シリカ粒子Ｂよりも個数平均粒径が大きく、前記シリカ粒子ＡのＢＥＴ比表面積が70m2/g以上150m2/g以下、個数平均粒径のＢＥＴ換算粒径に対する比で表される形状指数が2.0以上であり、前記シリカ粒子Ｂの形状指数が2.0未満である、静電荷像現像用トナー及びその製造方法。【選択図】なし</description><language>eng ; jpn</language><subject>CINEMATOGRAPHY ; ELECTROGRAPHY ; ELECTROPHOTOGRAPHY ; HOLOGRAPHY ; MAGNETOGRAPHY ; PHOTOGRAPHY ; PHYSICS</subject><creationdate>2024</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20240403&DB=EPODOC&CC=JP&NR=2024046198A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76290</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20240403&DB=EPODOC&CC=JP&NR=2024046198A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>KONDO HIDEAKI</creatorcontrib><creatorcontrib>IWADATE HIDEKI</creatorcontrib><title>ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER</title><description>To provide an electrostatic charge image developing toner which offers high initial image density and suppresses image blur in a high-temperature, high-humidity environment, and to provide a method of manufacturing the same.SOLUTION: An electrostatic charge image developing toner and a method of manufacturing the same are provided, the electrostatic charge image developing toner comprising toner base particles containing a binder resin and colorant and having a circularity in a range of 0.950 to 0.995, inclusive, and an external additive containing silica particles A and silica particles B having different number average particle diameters, where the silica particles A have a greater number average particle diameter than the silica particles B, a BET specific surface area in a range of 70 m2/g to 150 m2/g, inclusive, and a shape index of 2.0 or greater as expressed as a ratio of the number average particle diameter to a BET equivalent particle diameter, and the silica particles B have a shape index of less than 2.0.SELECTED DRAWING: None
【課題】初期画像濃度が高く、高温高湿下での画像カスレが抑制される、静電荷像現像用トナー及びその製造方法に関すること。【解決手段】結着樹脂及び着色剤を含有する、円形度が0.950以上0.995以下のトナー母粒子と、個数平均粒径の異なるシリカ粒子Ａ及びシリカ粒子Ｂを含有する外添剤とを含有する静電荷像現像用トナーであって、前記シリカ粒子Ａが前記シリカ粒子Ｂよりも個数平均粒径が大きく、前記シリカ粒子ＡのＢＥＴ比表面積が70m2/g以上150m2/g以下、個数平均粒径のＢＥＴ換算粒径に対する比で表される形状指数が2.0以上であり、前記シリカ粒子Ｂの形状指数が2.0未満である、静電荷像現像用トナー及びその製造方法。【選択図】なし</description><subject>CINEMATOGRAPHY</subject><subject>ELECTROGRAPHY</subject><subject>ELECTROPHOTOGRAPHY</subject><subject>HOLOGRAPHY</subject><subject>MAGNETOGRAPHY</subject><subject>PHOTOGRAPHY</subject><subject>PHYSICS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2024</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZNB29XF1DgnyDw5xDPF0VnD2cAxyd1Xw9HUEki6uYa4-_gGefu4KIf5-rkE8DKxpiTnFqbxQmptByc01xNlDN7UgPz61uCAxOTUvtSTeK8DIwMjEwMTM0NLC0ZgoRQDACyVm</recordid><startdate>20240403</startdate><enddate>20240403</enddate><creator>KONDO HIDEAKI</creator><creator>IWADATE HIDEKI</creator><scope>EVB</scope></search><sort><creationdate>20240403</creationdate><title>ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER</title><author>KONDO HIDEAKI ; IWADATE HIDEKI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JP2024046198A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; jpn</language><creationdate>2024</creationdate><topic>CINEMATOGRAPHY</topic><topic>ELECTROGRAPHY</topic><topic>ELECTROPHOTOGRAPHY</topic><topic>HOLOGRAPHY</topic><topic>MAGNETOGRAPHY</topic><topic>PHOTOGRAPHY</topic><topic>PHYSICS</topic><toplevel>online_resources</toplevel><creatorcontrib>KONDO HIDEAKI</creatorcontrib><creatorcontrib>IWADATE HIDEKI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>KONDO HIDEAKI</au><au>IWADATE HIDEKI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER</title><date>2024-04-03</date><risdate>2024</risdate><abstract>To provide an electrostatic charge image developing toner which offers high initial image density and suppresses image blur in a high-temperature, high-humidity environment, and to provide a method of manufacturing the same.SOLUTION: An electrostatic charge image developing toner and a method of manufacturing the same are provided, the electrostatic charge image developing toner comprising toner base particles containing a binder resin and colorant and having a circularity in a range of 0.950 to 0.995, inclusive, and an external additive containing silica particles A and silica particles B having different number average particle diameters, where the silica particles A have a greater number average particle diameter than the silica particles B, a BET specific surface area in a range of 70 m2/g to 150 m2/g, inclusive, and a shape index of 2.0 or greater as expressed as a ratio of the number average particle diameter to a BET equivalent particle diameter, and the silica particles B have a shape index of less than 2.0.SELECTED DRAWING: None
【課題】初期画像濃度が高く、高温高湿下での画像カスレが抑制される、静電荷像現像用トナー及びその製造方法に関すること。【解決手段】結着樹脂及び着色剤を含有する、円形度が0.950以上0.995以下のトナー母粒子と、個数平均粒径の異なるシリカ粒子Ａ及びシリカ粒子Ｂを含有する外添剤とを含有する静電荷像現像用トナーであって、前記シリカ粒子Ａが前記シリカ粒子Ｂよりも個数平均粒径が大きく、前記シリカ粒子ＡのＢＥＴ比表面積が70m2/g以上150m2/g以下、個数平均粒径のＢＥＴ換算粒径に対する比で表される形状指数が2.0以上であり、前記シリカ粒子Ｂの形状指数が2.0未満である、静電荷像現像用トナー及びその製造方法。【選択図】なし</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CINEMATOGRAPHY ELECTROGRAPHY ELECTROPHOTOGRAPHY HOLOGRAPHY MAGNETOGRAPHY PHOTOGRAPHY PHYSICS |
| title | ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER |
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