公开(公告)号：JP2005121832A

公开(公告)日：2005-05-12

申请号：JP2003355547

申请日：2003-10-15

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： FUJITA SAYAKA ,  KADOI MIKIO ,  UCHINO AKIKO ,  FUKUSHIMA KOUTARO

IPC: G03G9/08 ,  G03G5/047 ,  G03G21/00 ,  G03G21/10

Abstract: PROBLEM TO BE SOLVED: To provide an image forming apparatus which does not cause cleaning failure even when a low melting toner is used, by specifying a range of the surface free energy of an electrophotographic photoreceptor surface. SOLUTION: The photoreceptor 2 which is installed in the image forming apparatus 1 and on which an electrostatic latent image is formed by exposure to light according to image information has the surface free energy (γ) specified to 20 to 35 mN/m. The toner included in a developer 50 housed in a developing device 29 to develop an electrostatic latent image to form a toner image is specified to have 20 to 60°C glass transition temperature (Tg). By specifying γ of the photoreceptor 2 to a preferable range responding to the decrease in Tg of the toner, excessive adhesion strength of the toner to the surface of the photoreceptor 2 can be suppressed although the toner softens at low temperature. Therefore, both of improvement in the cleaning property and formation of a high-quality image can be achieved. COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：提供即使使用低熔点调色剂也不会引起清洁故障的图像形成装置，通过指定电子照相感光体表面的表面自由能的范围。 解决方案：根据图像信息，安装在图像形成装置1中并通过曝光形成静电潜像的感光体2具有指定为20至35mN / m的表面自由能（γ） 。 包含在容纳在显影装置29中以显影静电潜像以形成调色剂图像的显影剂50中的调色剂被指定为具有20至60℃的玻璃化转变温度（Tg）。 通过将感光体2的γ指定为与调色剂的Tg降低相对应的优选范围，尽管调色剂在低温下软化，但是可以抑制调色剂对感光体2的表面的过大的粘合强度。 因此，可以实现清洁性能的提高和高质量图像的形成。 版权所有（C）2005，JPO＆NCIPI

公开(公告)号：JP2007139891A

公开(公告)日：2007-06-07

申请号：JP2005330455

申请日：2005-11-15

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： TAKANO KATSUYA ,  FUJITA SAYAKA

IPC: G03G5/00 ,  B65D65/10 ,  B65D65/42

Abstract: PROBLEM TO BE SOLVED: To provide a packaging material of an electrophotographic photoreceptor arranging a powder-like solid lubricant so as not to be excessively adhered to the electrophotographic photoreceptor.
SOLUTION: A packaging material 1 with a lubricant for the electrophotographic photoreceptor keeps the powder-like solid lubricant 3 adhering only in a prescribed application region 4 on one face of a basic packaging material 2. The application region 4 has a size enough to contact a photosensitive layer of the surface of the electrophotographic photoreceptor neither more nor less. By the configuration, the solid lubricant 3 hardly adheres to the surface region other than the photosensitive layer of the electrophotographic photoreceptor, and as the result, the solid lubricant 3 adhering to the photosensitive layer is not excessive.
COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：提供一种布置粉末状固体润滑剂的电子照相感光体的包装材料，以便不会过多地粘附到电子照相感光体上。 解决方案：具有用于电子照相感光体的润滑剂的包装材料1将粉末状固体润滑剂3仅保持在基本包装材料2的一个面上的规定应用区域4中。施加区域4具有足够的尺寸 与电子照相感光体的表面的感光层接触也不多。 通过该结构，固体润滑剂3几乎不粘附到电子照相感光体的感光层以外的表面区域，结果粘附在感光层上的固体润滑剂3不会过多。 版权所有（C）2007，JPO＆INPIT

公开(公告)号：JP2004144777A

公开(公告)日：2004-05-20

申请号：JP2002306136

申请日：2002-10-21

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： KATO TAKESHI ,  URATA YOSHITAKA ,  NAKATSU KIYOBUMI ,  MATSUMOTO TAKATSURU ,  FUJITA SAYAKA

IPC: G03G9/08 ,  G03G9/10 ,  G03G9/113

Abstract: PROBLEM TO BE SOLVED: To provide a two-component developer having both of sufficient durability and environmental stability and reducing a deterioration in a photoreceptor as much as possible. SOLUTION: In the two-component developer having ≥5 wt.% coating amount in a carrier with respect to the weight of the core material, the toner concentration X wt.% in the developer satisfies 0.35×Ct≤X≤0.70×Ct, wherein Ct=k×ρtr/ρcR, ρt is the specific gravity of the toner, ρc is the specific gravity of the carrier, r is the average particle size of the toner, R is the average particle size of the carrier, and k is a coating coefficient defined by k=2/(3 0.5 )×π×100. COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：提供尽可能多的具有足够的耐久性和环境稳定性以及减少感光体的劣化的双组分显影剂。 解决方案：在相对于芯材重量的载体中具有≥5重量％涂层量的双组分显影剂中，显影剂中调色剂浓度X重量％满足0.35×Ct≤X≤0.70 ×Ct，其中Ct = k×ρtr/ρcR，ρt是调色剂的比重，ρc是载体的比重，r是调色剂的平均粒径，R是载体的平均粒径， k是由k = 2 /（3 0.5 ）×π×100定义的涂层系数。 版权所有（C）2004，JPO

公开(公告)号：JP2004101662A

公开(公告)日：2004-04-02

申请号：JP2002260830

申请日：2002-09-06

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： MATSUMOTO TAKATSURU ,  FUJITA SAYAKA ,  MURAKAMI TOSHIHIKO ,  SAKAI MASAHIRO ,  TENJIKU EIJI

IPC: G03G9/09

Abstract: PROBLEM TO BE SOLVED: To provide a toner which causes little agglomeration or fusion, is excellent in fluidity and transportability and ensures little variation of image quality even in continuous use or long-term use. SOLUTION: In a masterbatch comprising a colorant and a polyester resin, a polyester resin is used which has physical properties within the range defined by straight lines represented by expression 1: Sp=4Tg-110, expression 2: Sp=4Tg-170, expression 3: Sp=90 and expression 4: Sp=120 in coordinates of glass transition temperature (Tg) (x-axis) and softening point (Sp) (y-axis). The toner is prepared by using the resulting masterbatch. COPYRIGHT: (C)2004,JPO

公开(公告)号：JP2005300861A

公开(公告)日：2005-10-27

申请号：JP2004116001

申请日：2004-04-09

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： FUJITA SAYAKA ,  FUKUSHIMA KOUTARO ,  KADOI MIKIO ,  TORIYAMA KOICHI ,  ARIMURA TAKUYA

IPC: G03G9/08 ,  G03G5/04 ,  G03G15/02 ,  G03G21/10

Abstract: PROBLEM TO BE SOLVED: To prevent the occurrence of a flaw and density unevenness in a formed image for a long period by regulating the surface properties of an electrophotographic photoreceptor of an image forming apparatus using an electrostatic charging process of a contactless type.
SOLUTION: In the electrophotographic photoreceptor 1 disposed in the image forming apparatus using the electrostatic charging process of the contactless type, the creep value (C
IT ) when the surface is loaded with an indentation maximum load 30 mN under the environment of a temperature 25°C and relative humidity 50% is specified to ≥2.70% and the Vickers hardness (HV)of the surface is specified to 20,000 to 25,000. Such electrophotographic photoreceptor 1 is highly flexible, is not excessively soft and has the plasticity not to exhibit brittleness and is therefore excellent in printing durability and cleanability and does not give rise to the flaw and density unevenness in the formed image.
COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：通过使用非接触式静电充电方法调节图像形成装置的电子照相感光体的表面性能，防止长时间形成的图像中的缺陷和密度不均匀的发生。 解决方案：在使用非接触式静电充电工艺的图像形成装置中设置的电子照相感光体1中，当表面装载有压痕最大载荷时的蠕变值（℃SB> 在25℃，相对湿度50％的环境下，将30mN规定为≥2.70％，将表面的维氏硬度（HV）规定为20,000〜25,000。 这种电子照相感光体1是高柔性的，不过分柔软并且具有不显示脆性的可塑性，因此印刷耐久性和清洁性优异，并且不会导致形成图像中的缺陷和浓度不均匀。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2005181848A

公开(公告)日：2005-07-07

申请号：JP2003425062

申请日：2003-12-22

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： MATSUMOTO KATSURU ,  MURAKAMI TOSHIHIKO ,  FUJITA SAYAKA ,  TOYODA MITSUHIRO

IPC: G03G9/08 ,  G03G9/087 ,  G03G9/10 ,  G03G9/107 ,  G03G9/113

Abstract: PROBLEM TO BE SOLVED: To provide a developer which has superior low-temperature fixability, offset resistance, and blocking resistance, prevents carrier adhesion and toner scattering and can realize images of high quality which are free of fogging. SOLUTION: The developer contains a toner and a carrier, and the toner contains a binder resin containing amorphous resin and crystalline resin and copolymer particles which are obtained by making monomers containing 99 to 80wt% a radical polymerizable monomer and 1 to 20wt% a sulfonic acid-based monomer polymerized and have 0.01 to 2 μm for the average particle size of primary particles. The volume average grain size thereof is 3 to 10 μm. The carrier has electrical resistivity R(Ωcm) of 12 to 25 in common logarithm value, a first fluidity index of 63 to 75 sec/(50 cm 3 ) and a second fluidity index of 30 to 100 (Oe g)/cm 3 . COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：为了提供具有优异的低温定影性，抗偏移性和抗粘连性的显影剂，防止载体粘附和调色剂飞散，并且可以实现没有起雾的高质量图像。 显影剂含有调色剂和载体，并且调色剂含有含有无定形树脂和结晶性树脂的粘合剂树脂和共聚物颗粒，其通过制备含有99〜80重量％的自由基聚合性单体和1〜20重量％ 磺酸基单体聚合，对于一次粒子的平均粒径为0.01〜2μ​​m。 体积平均粒径为3〜10μm。 载体的电阻率R（Ωcm）为通常的对数值为12〜25，第一流动性指数为63〜75秒/（50cm 3 /秒），第二流动性指数为30〜100（ Oe g）/ cm 3 。 版权所有（C）2005，JPO＆NCIPI

公开(公告)号：JP2005164647A

公开(公告)日：2005-06-23

申请号：JP2003399760

申请日：2003-11-28

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： MATSUMOTO KATSURU ,  MURAKAMI TOSHIHIKO ,  FUJITA SAYAKA ,  TOYODA MITSUHIRO

IPC: G03G9/08 ,  G03G9/087 ,  G03G9/10 ,  G03G9/107 ,  G03G9/113

Abstract: PROBLEM TO BE SOLVED: To provide a developer having excellent low temperature fixing property of toner, offset resistance and blocking resistance, and capable of realizing a high-quality image without fog without causing carrier sticking or toner scattering. SOLUTION: The developer contains the following toner and carrier. The toner contains: a binder resin containing an amorphous resin and a crystalline resin; and copolymer particles obtained by polymerizing monomers containing 99 to 80 wt.% radical polymerizable monomers and 1 to 20 wt.% sulfonic acid-based monomers and having 0.01 to 2 μm average particle size of primary particles. The carrier has the electric resistance R (Ω cm) of 12 to 25 in terms of common logarithm (LogR), 63 to 75 sec/(50×cm 3 ) F1 defined by F1=AD×FR(1), and 30 to 100 Oe×g/cm 3 F2 defined by F2=AD×Hc(2), wherein AD represents apparent density, FR represents fluidity and Hc represents coercive force. COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：提供具有优异的调色剂的低温定影性，耐偏移性和抗粘连性的显影剂，并且能够在不引起载体粘附或调色剂飞散的情况下实现高质量的图像。

解决方案：显影剂含有以下墨粉和载体。 调色剂含有：含有无定形树脂和结晶性树脂的粘合剂树脂; 以及通过使含有99〜80重量％的自由基聚合性单体和1〜20重量％的磺酸系单体并且具有0.01〜2μ​​m平均粒径的一次粒子的单体聚合而得到的共聚物粒子。 载体具有通过F1 = AD×FR定义的通常对数（LogR），63至75秒/（50×cm 3 / SP>）F1的电阻R（Ωcm）为12至25 （1）和由F2 = AD×Hc（2）定义的30至100 Oe×g / cm 3 SP SP，其中AD表示密度，FR表示流动性，Hc表示矫顽力。 版权所有（C）2005，JPO＆NCIPI

公开(公告)号：JP2004334041A

公开(公告)日：2004-11-25

申请号：JP2003132047

申请日：2003-05-09

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： FUJITA SAYAKA ,  MATSUMOTO KATSURU ,  SAKAI MASAHIRO ,  MURAKAMI TOSHIHIKO ,  KATO TAKESHI ,  TENJIKU EIJI

IPC: G03G9/09 ,  G03G9/087

Abstract: PROBLEM TO BE SOLVED: To provide a method for evaluating whether a masterbatch for a toner is good or not, and to provide a good masterbatch for a toner obtained by the evaluation method and a toner. SOLUTION: In the method for evaluating a masterbatch for a toner consisting essentially of a binder resin and a colorant, whether relation satisfying -6≤logRm-logRr is established or not between the volume resistivity Rr (Ωcm) of the binder resin and the volume resistivity Rm (Ωcm) of the masterbatch is ascertained. The masterbatch for a toner establishes relation satisfying -6≤logRm-logRr according to the evaluation method. The toner comprises the masterbatch for a toner and has a volume average particle diameter of ≤7 μm. COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：提供一种用于评估调色剂母料是否良好的方法，以及为通过评估方法获得的调色剂和调色剂提供良好的母料。 解决方案：在用于评估基本上由粘合剂树脂和着色剂组成的调色剂的母料的方法中，在粘合剂树脂的体积电阻率Rr（Ωcm）之间是否建立满足-6≤logRm-logRr的关系 并确定母料的体积电阻率Rm（Ωcm）。 调色剂母料根据评估方法建立满足-6≤logRm-logRr的关系。 调色剂包含用于调色剂的母料，体积平均粒径≤7μm。 版权所有（C）2005，JPO＆NCIPI

公开(公告)号：JP2004157272A

公开(公告)日：2004-06-03

申请号：JP2002321988

申请日：2002-11-06

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： FUJITA SAYAKA ,  MATSUMOTO KATSURU ,  MURAKAMI TOSHIHIKO ,  TENJIKU EIJI

IPC: C08K3/04 ,  G03G9/08 ,  G03G9/087 ,  G03G9/09

CPC classification number: B82Y30/00 ,  C08K3/04 ,  C08K2201/011 ,  G03G9/0821 ,  G03G9/0904 ,  C08L67/02

Abstract: PROBLEM TO BE SOLVED: To provide a carbon black masterbatch for toner capable of achieving high image density even with a small amount of the toner and an electrophotographic toner using the masterbatch. SOLUTION: The masterbatch comprises a polyester resin as a binder resin and carbon black having a primary particle diameter of 10-100 nm as a colorant, 30-60 pts. wt. carbon black is blended, its lightness L* is ≤20, and a reflectance A at 400 nm and a reflectance B at 700 nm are within such ranges as to satisfy relation of the expression 0.5 COPYRIGHT: (C)2004,JPO

公开(公告)号：JP2004138967A

公开(公告)日：2004-05-13

申请号：JP2002305799

申请日：2002-10-21

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： MATSUMOTO TAKATSURU ,  FUJITA SAYAKA ,  MURAKAMI TOSHIHIKO ,  TENJIKU EIJI

IPC: G03G9/08 ,  G03G9/087 ,  G03G9/09

Abstract: PROBLEM TO BE SOLVED: To efficiently produce high-quality toner having sufficient coloring properties by using a kneading method of continuous treatment, where no batch operation of repetition is required. SOLUTION: A manufacturing method of toner includes a first kneading process for fusing and kneading a raw material mixture containing at least a binder resin and colorant; and a second kneading process for diluting and mixing the kneaded object obtained by the first kneading process by at least the same kind of binder resin or a different kind of binder and for fusing and kneading the diluted mixture. Additionally, the kneaded object obtained by the second kneading process is crushed and continuous-type two-roll-type kneading machine is used in the first kneading process. Further, the average residence time (θ) of the kneaded object in the kneading machine meets the following expression and is at least two minutes or more. In this case, the expression is expressed by θ=5π×L×ρ×Δd×(Δd+D)×(1/F)>2. COPYRIGHT: (C)2004,JPO