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US 2003/0165761 A1Published application
Toner containing specific external additive for full color-copying machine and fixing method of the same
AssigneeMinolta Co., Ltd.
InventorsTakeshi Arai, Masahiro Anno, Chikara Tsutsui, Minoru Nakamura, Yoshitaka Sekiguchi
Life of this patent
Estimating the term…
Abstract
The present invention relates to toners for full color image-forming machine with specific external additives (kind, BET specific surface area etc.) added externally in combination to toner particles prepared by a wet granulation method, and a fixing method suitable for the toner.
Claims20
A toner for a full-color image-forming machine, comprising:
- toner particles comprising at least a binder resin and a colorant;
- and
- an external additive, contained at a content of 2.1-5.5 parts by weight on the basis of 100 parts by weight of the toner particles;
- the toner having BET specific surface area of 2.0-4.0 m2/g.
1 more element
A toner-fixing method, the toner comprising
- toner particles comprising at least a binder resin and a colorant;
- and
- an external additive, contained at a content of 2.1-5.5 parts by weight on the basis of 100 parts by weight of the toner particles;
- and
- having BET specific surface area of 2.0-4.0 m2/g;
- in which a recording medium with toner images formed thereon is passed through a press-contact portion between
- a heating member constituted of a surface layer of fluorine-containing resin and an elastic material layer and
- a pressure member or a pressure heat-applying member, that is made in press-contact with the heating member.
5 more elements
A toner for a full-color image-forming machine, comprising:
- toner particles, comprising at least a binder resin and a colorant, and having a volume mean particle size of 3-7 μm;
- and
- an external additive, comprising
- first inorganic fine particles that are surface-treated by a hydrophobizing agent to have a BET specific surface area of 150 to 300 m2/g after surface treatment,
- second inorganic fine particles that are surface-treated by a hydrophobizing agent to have a BET specific surface area of 30 to 100 m2/g after surface treatment, and
- third inorganic fine particles having a BET specific surface area of 3 to 20 m2/g, and a total specific surface area of the external additive being set to 200 to 530 m2/g with respect to 100 parts by weight of the toner particles.
3 more elements
A toner for a nonmagnetic monocomponent developer used in a full-color image-forming machine, comprising:
- toner particles, comprising at least a binder resin and a colorant, and having a volume mean particle size of 3-7 μm;
- and
- an external additive, comprising
- first inorganic fine particles that are surface-treated by a hydrophobizing agent to have a BET specific surface area of 150 to 300 m2/g after surface treatment,
- second inorganic fine particles that are surface-treated by a hydrophobizing agent to have a BET specific surface area of 30 to 100 m2/g after surface treatment, and
- third inorganic fine particles having a BET specific surface area of 3 to 20 m2/g, and a total specific surface area of the external additive being set to 200 to 530 m2/g with respect to 100 parts by weight of the toner particles.
3 more elements
A toner-fixing method, the toner comprising
- toner particles, comprising at least a binder resin and a colorant, and having a volume mean particle size of 3-7 μm;
- and
- an external additive, comprising
- first inorganic fine particles that are surface-treated by a hydrophobizing agent to have a BET specific surface area of 150 to 300 m2/g after surface treatment,
- second inorganic fine particles that are surface-treated by a hydrophobizing agent to have a BET specific surface area of 30 to 100 m2/g after surface treatment, and
- third inorganic fine particles having a BET specific surface area of 3 to 20 m2/g, and a total specific surface area of the external additive being set to200 to 530 m2/g with respect to 100 parts by weight of the toner particles
- in which a recording medium with toner images formed thereon is passed through a press-contact portion between
- a heating member constituted of a surface layer of fluorine-containing resin and an elastic material layer and
- a pressure member or a pressure heat-applying member, that is made in press-contact with the heating member.
6 more elements
Dependencies are inferred from the claim text.