摘要:
Provided is a magnetic toner which exhibits a high degree of blackness and high tinting strength, and in which scraping of a toner carrying member surface by the magnetic toner is not caused, and image defects such as fogging and tailing are suppressed. A magnetic toner comprising a magnetic toner particle that contains a binder resin and a magnetic iron oxide particle, wherein, the number-average particle diameter of the magnetic iron oxide particle ranges from 0.05 µm to 0.15 µm, and a relationship between the number-average particle diameter (µm) of the magnetic iron oxide particle and the specific surface area (m 2 /g) of the magnetic iron oxide particle satisfies Expression (1) below.
摘要:
A toner of the present invention comprises at least a binder resin comprising as a main component a polyester resin, a wax, and a colorant, in which in case of measuring a wettability of the toner with respect to a mixed solvent of methanol and water in terms of an optical transimittance at an optical wavelength of 780 nm, a methanol concentration of the mixed solvent is in a range of 45 to 65% by volume when an optical transmittance is 80% and 10%, respectively; a melt index (MI) is of 0.1 to 10 g/10 min at a temperature of 125°C and a load of 5 kg; the toner comparises a resin component insoluble to tetrahydrofuran (THF insoluble component) in an amount of 5 to 40% by mass based on a mass of the binder resin; and the toner comprises a THF soluble component having a main peak in a molecular weight region of 3, 000 to 20, 000, and has a proportion of a component having a molecular weight of 10, 000 or less in the THF soluble component is 50% by mass or more, according to a chromatogram of the THF soluble component measured by gel permeation chromatography. According to the toner of the present invention, it is possible to control lowering of an image density after leaving under a high temperature and high humidity environment, and a decline in the image density due to a charge-rise phenomenon upon low rate printing. Further, the toner has excellent fixing property and high temperature offset characteristic, and occurring of the end-offset is controlled.
摘要:
To provide a toner including at least a binder resin and magnetic iron oxide, in which the magnetic iron oxide contains 0.1 to 2.0% by mass of Si with respect to the magnetic iron oxide and 0.1 to 4.0% by mass of Zn with respect to the magnetic iron oxide, a concentration of Si atoms is 12.50 to 17.50%, a concentration of Fe atoms is 70.00 to 85.00%, and a concentration of Zn atoms is 1.00 to 7.00% on an outermost surface of the magnetic iron oxide, measured by an X-ray photoelectron spectroscopy (XPS), and a Zn/Si ratio being 0.05 to 0.5, a Fe/Si ratio being 3.00 to 7.00, and a Fe/Zn ratio is 10.00 to 70.00 on an outermost surface of the magnetic iron oxide. As a result, a magnetic toner in which the rising of the toner charge amount is rapid, the degradation of image quality and reduction in image density are not caused even after a long-term use, and which is excellent in environmental stability can be obtained.
摘要:
Hydrophobic inorganic fine particles characterized by being a mixture of at least small-particle-diameter inorganic fine particles having an average primary particle diameter of 5 to 25 nm and having a maximum peak particle diameter of 20 nm or less and large-particle-diameter inorganic fine particles having an average primary particle diameter which is 1.5 to 100 times the average primary particle diameter of the small-particle-diameter inorganic fine particles; the mixture being a mixture having been treated in the same treating tank to subject both the small-particle-diameter inorganic fine particles and large-particle-diameter inorganic fine particles simultaneously to hydrophobic treatment.
摘要:
Electrochemical corrosion of a reflective layer provided in a scintillator panel is prevented. The scintillator panel includes a conductive base member for supporting a wavelength converter layer and a reflective layer for emitting light converted by a phosphor layer to the outside, in which an insulating layer is formed between the conductive base member and the reflective layer. Alternatively, the above problem is solved by a scintillator panel in which the full circumference including the base member surface side of the reflective layer, the wavelength converter layer side of the reflective layer, and end surfaces of the reflective layer is covered with an insulating layer or a protective film for the reflective layer and a radiation imaging device using such a scintillator panel.
摘要:
An optical recording medium includes an integrated circuit (IC) module whose exposed surface is masked so as not to be visually recognized. The optical recording medium can be efficiently manufactured without degrading the essential function thereof. The optical recording medium includes a transparent substrate, an optical recording layer and a protective layer provided in this sequence. The IC module is buried in the optical recording medium so that one surface of the IC module is exposed on the protective layer. The optical recording medium also includes a hardened surface layer, transparent to a light beam for reproducing information recorded in the optical recording layer, or for reproducing information recorded in the optical recording layer and recording information in the optical recording layer, provided on a surface of the transparent substrate where the light beam is projected, and a masking layer provided in a region behind the IC module on the external surface of the hardened surface layer.
摘要:
An electrophotographic toner is composed of at least a binder resin, a colorant, and a wax. The binder resin (a) comprises a polyester resin, a vinyl resin and a hybrid resin component comprising a polyester unit and a vinyl polymer unit, (b) has a THF (tetrahydrofuran)-soluble content (W1) of 50 - 85 wt. % and a THF-insoluble content (W2) of 5 - 50 wt. %, an ethyl acetate-soluble content (W3) of 40 - 98 wt. % and an ethyl acetate-insoluble content (W4) of 2 - 60 wt. %, a chloroform-soluble content (W5) of 55 - 90 wt. % and a chloroform-insoluble content (W6) of 10 - 45 wt. %, respectively after 10 hours of Soxhlet extraction with respective solvents, giving a ratio W4/S6 of 1.1 - 4.0, and contains a THF-soluble content providing a GPC (gel permeation chromatography) chromatogram exhibiting a main peak in a molecular weight range of 4000 - 9000, including 35.0 - 65.0 % (A1) of a component haing molecular weights in a range of 500 to below 1x10 4 , 25.0 - 45.0 % (A2) of a component having molecular weights in a range of 1x10 4 to below 1x10 5 and 10.0 - 30.0 % (A3) of a component having molecular weights of at least 1x10 5 giving a ratio A1/A2 of 1.05 - 2.00. The binder resin shows good dispersibility of wax and colorant.
摘要:
A highly reliable hybrid card and a recording/reproducing apparatus to be used with such a hybrid card are provided. An information recording medium has a size of a credit card and comprises a transparent substrate (111), an optical recording layer (113), an IC chip (103) and an antenna coil (107) for an information exchanging operation of at least either recording information on the IC chip (103) or reproducing information stored in the IC chip (103) without bringing the IC chip (103) and the information recording/reproducing apparatus into direct mutual contact. The transparent substrate (111), the optical recording layer (113) and the antenna coil (107) are arranged in the above listed order.