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US 2003/0073019 A1Published application
Binder resin containing polyhydroxyalkanoate, toner containing the binder resin, and image-forming method and image-forming apparatus which make use of the toner
AssigneeCanon Kabushiki Kaisha
InventorsTetsuya Yano, Etsuko Sugawa, Takeshi Imamura, Takashi Kenmoku
Life of this patent
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Abstract
A polyhydroxyalkanoate (PHA) comprised of two kinds of units, a 3-hydroxybutyrate (3HB) unit and a 3-hydroxyhexanoate (3HHx) unit is used as a binder resin. This provides a binder resin which is biodegradable and can more highly contribute to the conservation of natural environment.
Claims11
A binder resin for toners which comprises a polyhydroxyalkanoate having at least two kinds of units, a 3-hydroxybutyrate (3HB) unit represented by the following formula (1) and a 3-hydroxyhexanoate (3HHx) unit represented by the following formula (2)
- 3
A toner comprising a binder resin, wherein
- said binder resin comprises a polyhydroxyalkanoate having at least two kinds of units, a 3-hydroxybutyrate (3HB) unit represented by the following formula (1) and a 3-hydroxyhexanoate (3HHx) unit represented by the following formula (2):
- 5
An image-forming method comprising the steps of:
- a charging step of applying a voltage to a charging member from its outside to charge an electrostatic-latent-image-bearing member electrostatically;
- a latent-image-forming step of forming an electrostatic latent image on the electrostatic-latent-image-bearing member thus charged;
- a developing step of developing the electrostatic latent image by the use of a toner for developing electrostatic latent images, to form a toner image on the electrostatic-latent-image-bearing member;
- a transfer step of transferring to a recording medium the toner image formed on the electrostatic-latent-image-bearing member;
- and
- a fixing step of fixing by heat the toner image held on the recording medium;
- wherein said toner comprises a binder resin, and the binder resin comprises a polyhydroxyalkanoate having at least two kinds of units, a 3-hydroxybutyrate (3HB) unit represented by the following formula (1) and a 3-hydroxyhexanoate (3HHx) unit represented by the following formula (2):
- 6
5 more elements
An image-forming method comprising the steps of:
- a charging step of applying a voltage to a charging member from its outside to charge an electrostatic-latent-image-bearing member electrostatically;
- a latent-image-forming step of forming an electrostatic latent image on the electrostatic-latent-image-bearing member thus charged;
- a developing step of developing the electrostatic latent image by the use of a toner for developing electrostatic latent images, to form a toner image on the electrostatic-latent-image-bearing member;
- a first transfer step of transferring to an intermediate transfer member the toner image formed on the electrostatic-latent-image-bearing member;
- a second transfer step of transferring to a recording medium the toner image held on the intermediate transfer member;
- and
- a fixing step of fixing by heat the toner image held on the recording medium;
- wherein said toner comprises a binder resin, and the binder resin comprises a polyhydroxyalkanoate having at least two kinds of units, a 3-hydroxybutyrate (3HB) unit represented by the following formula (1) and a 3-hydroxyhexanoate (3HHx) unit represented by the following formula (2):
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6 more elements
An image-forming apparatus comprising:
- charging means for applying a voltage to a charging member from its outside to charge an electrostatic-latent-image-bearing member electrostatically;
- latent-image-forming means for forming an electrostatic latent image on the electrostatic-latent-image-bearing member thus charged;
- developing means for developing the electrostatic latent image by the use of a toner for developing electrostatic latent images, to form a toner image on the electrostatic-latent-image-bearing member;
- transfer means for transferring to a recording medium the toner image formed on the electrostatic-latent-image-bearing member;
- and
- fixing means for fixing by heat the toner image held on the recording medium;
- wherein said toner comprises a binder resin, and the binder resin comprises a polyhydroxyalkanoate having at least two kinds of units, a 3-hydroxybutyrate (3HB) unit represented by the following formula (1) and a 3-hydroxyhexanoate (3HHx) unit represented by the following formula (2):
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5 more elements
An image-forming apparatus comprising:
- charging means for applying a voltage to a charging member from its outside to charge an electrostatic-latent-image-bearing member electrostatically;
- latent-image-forming means for forming an electrostatic latent image on the electrostatic-latent-image-bearing member thus charged;
- developing means for developing the electrostatic latent image by the use of a toner for developing electrostatic latent images, to form a toner image on the electrostatic-latent-image-bearing member;
- first transfer means for transferring to an intermediate transfer member the toner image formed on the electrostatic-latent-image-bearing member;
- second transfer means for transferring to a recording medium the toner image held on the intermediate transfer member;
- and
- fixing means for fixing by heat the toner image held on the recording medium;
- wherein said toner comprises a binder resin, and the binder resin comprises a polyhydroxyalkanoate having at least two kinds of units, a 3-hydroxybutyrate (3HB) unit represented by the following formula (1) and a 3-hydroxyhexanoate (3HHx) unit represented by the following formula (2):
- 9
6 more elements
Dependencies are inferred from the claim text.