Toner and production method thereof, image forming apparatus...

G - Physics – 03 – G

Patent

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G03G 9/08 (2006.01) G03G 9/087 (2006.01)

Patent

CA 2576105

The object of the invention is to provide a toner enabling excellent transferring properties, cleanability, and fixability, and forming a high- precision image without substantially degraded image quality even after printed on a number of sheets of paper. The invention also provides the toner- production method, an image forming apparatus, an image forming method, and a process cartridge. To this end, the present invention provides a toner which comprises toner-base particles containing a binder resin and a filler, and inorganic fine particles, in which the filler is included in a filler-layer in the vicinity of surfaces of the toner-base particles, the number average particle diameter of the primary particles of the inorganic fine particles is 90nm to 300nm, and the average circularity of the toner is 0.95.

L~invention porte sur un toner aux excellentes propriétés de transfert, de nettoyabilité et de fixabilité, et formant une image de grande précision sans compromettre sensiblement la qualité d~image même après impression d~un certain nombre de feuilles de papier. L~invention porte également sur un procédé de fabrication de toner, un appareil de formation d~image, un procédé de formation d~image et une cartouche de procédé. A cette fin, la présente invention porte sur un toner comprenant des particules à base de toner contenant une résine de liant et une matière de remplissage, et de fines particules inorganiques, où la matière de remplissage est incluse dans une couche de matière de remplissage au voisinage des surfaces des particules à base de toner, le diamètre particulaire moyen en nombre des particules primaires des fines particules inorganiques est compris entre 90nm et 300nm, et la circularité moyenne du toner est de 0,95.

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