摘要:
The present invention relates to a resin composition for protective layer transfer sheets which includes a polyester resin produced by polycondensing a polyhydric alcohol component containing a hydrogenated bisphenol A in an amount of 30 mol % or more and a polycarboxylic acid component containing a benzenedicarboxylic acid in an amount of 50 mol % or more.
摘要:
The present invention relates to a resin for use in a thermal transfer image-receiving sheet which is excellent in dyeability with dyes and releasability of the sheet, a resin dispersion using the resin, and a thermal transfer image-receiving sheet. The resin for a thermal transfer image-receiving sheet is obtained by addition polymerizing and condensation polymerizing (a) raw monomers of a polyester, (b) a raw monomer of an addition polymer-based resin containing at least one compound selected from the group consisting of styrene and styrene derivatives and (c) at least one dually reactive monomer selected from the group consisting of acrylic acid, methacrylic acid and derivatives of these acids, wherein the raw monomers (a) of a polyester include an alcohol component containing 80 mol % or more of an alkyleneoxide adduct of 2,2-bis(4-hydroxyphenyl)propane.
摘要:
A fixing device which can reduce an overshoot of the surface temperature of a main heating section without lengthening a warming-up period of time, an image forming apparatus equipped therewith, and a recording medium on which is recorded the temperature control program are provided. In a standby mode, control is performed to stop an operation of a halogen lamp which is an internal heat source, when a surface temperature of a heating roller reaches a certain temperature lower than a target temperature, or when the operating period of time of the halogen lamp reaches a certain period of time. By so doing, as the heating roller ceases to be heated at a point at which it reaches a temperature lower than the target temperature, it is possible to reduce the overshoot of the surface temperature of the heating roller.
摘要:
An image forming apparatus of the wet fixing method includes a toner image forming section, a intermediate transfer section including an intermediate transfer belt, a fixing fluid applying section that applies a fixing fluid to a toner image on the intermediate transfer belt and swells and/or softens the toner image, a transferring and fixing section, a recording medium feeding section, and a scanner section. The fixing fluid applying section and the transferring and fixing section are placed so that, when the toner image in a swelled and/or softened state on the intermediate transfer belt is transferred and fixed to a recording medium, adhesive force A between toner forming the toner image and the intermediate transfer belt becomes smaller than adhesive force B between the toner and the recording medium.
摘要:
The present invention relates to a resin emulsion being produced by neutralizing a resin binder containing acid group with a basic compound in an aqueous medium wherein the resin binder containing acid group contains a polyester produced from a raw monomer composition containing a trivalent or higher-valent polyhydric alcohol in an amount of 1 to 15 mol %; a process for producing the resin emulsion; and a toner for electrophotography using the resin emulsion. In the resin emulsion of the present invention, a resin is readily emulsified therein even when using a crosslinked polyester as the resin, and the resin emulsion is substantially free from hydrolysis of the resin and can produce a toner having an excellent heat-resistant storage property.
摘要:
A light-emitting gallium nitride-based compound semiconductor device of a double-heterostructure. The double-heterostructure includes a light-emitting layer formed of a low-resistivity In.sub.x Ga.sub.1-x N (0
摘要:
A method of refining molten metal includes the steps of reduced-pressure-refining molten metal in a heated vessel, adding slag-forming agents into the refined molten metal while keeping the molten metal in the vessel, or after pouring the molten metal into another vessel, re-refining the molten metal by heating the molten metal with inert-gas plasma and while stirring the molten metal as occasion demands. Preferably, the refining apparatus includes two adjacent chambers, each chamber isolated from the surrounding atmosphere. The chambers can be connected with, or separated from, each other and each chamber is provided with an exhaust device. One of the chambers is provided with an induction heating refining furnace, and the other chamber is provided with inert gas plasma heater. The apparatus also includes a re-refining vessel which is transferable between the two chambers, and a material feeder for feeding slag-forming agents into the re-refining vessel.
摘要:
An image forming apparatus includes multiple image forming stations, and a controller for executing selectively a multi-color image mode or a monochromatic image forming mode, wherein in the monochromatic image forming mode, a first one of image forming stations which forms the image, and a second one which is upstream of the first image forming station exposes the image bearing members to a first image pattern and a second image pattern, respectively, and the controller determines the second image pattern in accordance with the first image pattern, and effects the exposure to the second image pattern.
摘要:
In a case where a process is carried out with respect to an envelope in a fixing process mode, at least either (i) a set temperature of a fixing roller in a fixing process or (ii) a set temperature of an endless belt in the fixing process which endless belt is provided in an external heating device is changed in accordance with a time period between an end of a warm-up mode and a start of the fixing process mode. This makes it possible to prevent both a wrinkle and inadequate fixing in a fixing process of an envelope carried out by a fixing device of an external heating method.
摘要:
A fixing device of the present invention includes: an external heating belt which is to contact with a surface of a fixing roller so as to heat up the fixing roller; and a cleaning member (a scraper and/or cleaning pad) which is to contact with the external heating belt. The cleaning pad which is impregnated with silicone oil is to contact with a surface of the external heating belt, thereby applying the silicone oil (release agent) to the surface of the external heating belt. This makes it possible to prevent generation of an offset.