摘要:
It is a toner for optical fixing which contains a binder resin, a colorant, and an infrared light absorbent, and the infrared light absorbent has a coloring opacity of 20 or less, and of phthalocyanine compound and/or naphthalocyanine compound.
摘要:
In a color toner for forming an image, comprising at least a binder resin and a colorant, light-absorbing fine composite particles comprising core particles and at least two coating layers having different refractive indexes laminated on the surface of the core particles or other IR-absorbing compounds such as an azulene compound having a specific structure are used as an infrared absorbing compound. The color toner is used in an electrophotographic color image forming apparatus using a photofixing system for fixing a toner image.
摘要:
A toner for electrophotography fulfilling both the fixability and the void resistance at high level, and forms a high-quality image. The toner for electrophotography contains: a binder resin; and a wax component which contains: a first wax having an endothermic peak in a temperature region of 60 to 90° C., the endothermic peak occurring in the temperature-rising stage of a DSC curve determined by a differential scanning calorimeter, and having a molecular weight distribution (weight-average molecular weight (Mw)/number-average molecular weight (Mn)) of 1.5 or less, and substantially not containing a component having 500 Mw or less; and at least any of a second wax having an endothermic peak in a temperature region of 100 to 150° C. and the molecular weight distribution of 5 to 20; and a third wax having an endothermic peak in a temperature region of 150 to 170° C. and the molecular weight distribution of 1.1 or more.
摘要:
A color image forming apparatus forms a color image on a recording medium by using a toner including a binding resin, a coloring agent and infrared ray absorbent, and a light source for causing the toner to melt. The light source has a plurality of light emission peaks having wavelengths of &lgr;1, &lgr;2, &lgr;3, . . . , &lgr;n in a range of 500 nm through 3000 nm. Setting is made such that the following relationship is satisfied: |&lgr;1−&Lgr;1
摘要:
In an imaging color toner employing a photofixing system, a binder resin, which contains, as a principal component, a polyester resin obtained by mixing a first polyester resin having a softening point Tsp of not lower than 120° C. and lower than 170° C. with a second polyester resin having a softening point Tsp of not lower than 80° C. and lower than 110° C. in a weight ratio of 80:20 to 20:80, is used. The color toner is used in an electrophotographic process and other imaging processes.
摘要:
A color toner for electrophotography, preferably used as a flash fixing toner which can be processed at a high speed, and exhibit excellent fixing property, high image resolution (image reproducibility) when fixed, and color reproducibility by color overlapping, and having a preferable color tone, with which a multi-color image can be formed. The color toner for electrophotography is used for the extreme bottom layer of a multi-color image comprised of laminating at least two types of toners that are selected from black toner, magenta toner, yellow toner, and cyan toner, and contains a coloring agent and an infrared ray absorbent, the color toner for electrophotography has a contrast ratio in the range of 35% to 95%.
摘要:
A developing device for electrophotographic image has a developing mechanism having a developer carrier for carrying a developer along a preset circulating route including a developing area and a developer restricting element for restricting the developer on the developer carrier, and a developer supply mechanism having a storing unit. The storing unit is filled with a start-up developer in the vicinity of the developer carrier and a replenishing developer remoter than the start-up developer from the developer carrier. The start-up developer and the replenishing developer have different grain sizes or grain size distributions. Further, a developing method for electrophotograhic image has the steps of using the start-up developer at an initial state of use of the developing mechanism, and using the replenishing developer differed in grain size or grain size distribution from the start-up developer after an end of the initial state of use of the developing mechanism.
摘要:
A developing device for electrophotographic image has a developing mechanism having a developer carrier for carrying a developer along a preset circulating route including a developing area and a developer restricting element for restricting the developer on the developer carrier, and a developer supply mechanism having a storing unit. The storing unit is filled with a start-up developer in the vicinity of the developer carrier and a replenishing developer remoter than the start-up developer from the developer carrier. The start-up developer and the replenishing developer have different grain sizes or grain size distributions. Further, a developing method for electrophotograhic image has the steps of using the start-up developer at an initial state of use of the developing mechanism, and using the replenishing developer differed in grain size or grain size distribution from the start-up developer after an end of the initial state of use of the developing mechanism.
摘要:
An image forming device is provided which can prolong the service life of a fixing roll and provide a good anti-offset property, an image having high surface smoothness and good printing properties. A fixer for electrophotography, wherein an electrostatic latent image is developed, comprises a fluororesin-coated fixing roll (2, 9) for fixing a toner and a mechanism (5, 12, 12a, 12b) for coating a fluorosilicone polymer as a release agent onto the surface of the fixing roll.
摘要:
A color toner for electrophotography having excellent fixability and void resistance is capable of forming a high-quality image. The color toner for electrophotography comprises a binder resin and is a magenta toner, and used in combination with at least any of yellow toner and cyan toner. The storage modulus (G′100) (100° C.) of the binder resin is (1/1.1) to (1/10) times the storage modulus (G′100) (100° C.) of a binder resin contained in the yellow toner and the cyan toner. In addition, the color toner for electrophotography comprises a binder resin, C.I. pigment Violet 19, and an infrared absorbent. The color toner is a magenta toner used in combination with at least any of an yellow toner and a cyan toner. The content of the infrared absorbent in the magenta toner is higher than the content of an infrared absorbent in the yellow toner and the cyan toner.