Single layer type electrophotographic photoconductor and image forming device
An electrophotography, single-layer type technology, applied in the electrical recording process using the charge pattern, the equipment of the electric recording process using the charge pattern, optics, etc., can solve the problems such as easy to generate black spots, and achieve the purpose of inhibiting oxidation degradation, inhibiting The occurrence of whitening, the effect of suppressing whitening
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no. 1 approach
[0031] The first embodiment is a single-layer electrophotographic photoreceptor having a base and a single-layer photosensitive layer disposed on the base, the photosensitive layer containing a charge generating agent, a charge transporting agent, and a first binder resin in the same layer. , used in an image forming device equipped with a cleaning member having a cleaning roller, wherein the first binder resin is a polycarbonate resin with a viscosity average molecular weight in the range of 10,000 to 40,000, and the film thickness of the photosensitive layer is 20 The absolute value of the withstand voltage measured in accordance with JIS C 2110 in the range of ˜45 μm is 6 kV or more.
[0032] Hereinafter, the single-layer electrophotographic photoreceptor according to the first embodiment will be specifically described according to each constituent element.
[0033] 1. Basic composition
[0034] like figure 1 As shown in (a), the electrophotographic photoreceptor of the p...
no. 2 approach
[0177] A second embodiment is an image forming apparatus including the single-layer electrophotographic photoreceptor described as the first embodiment, wherein a charging member, an exposure member, a developing member, A transfer member and a cleaning member are provided, and a member having a cleaning roller (roller cleaning system) is provided as the cleaning member.
[0178] Hereinafter, the image forming apparatus according to the second embodiment will be specifically described for each component.
[0179] 1. Basic composition
[0180] Figure 5 It is a schematic diagram of an example of the tandem image forming apparatus of the present invention.
[0181] The image forming apparatus 1 includes an intermediate transfer belt 11 . Further, on the upper side of the intermediate transfer belt 11, a magenta developing member 7M, a cyan image developing member 7C, a yellow image developing member 7Y, and a black image developing member 7M are respectively arranged along th...
Embodiment 1
[0230] 1. Manufacture of electrophotographic photoreceptor
[0231] (1) Preparation of substrate
[0232] An aluminum substrate with a diameter of 30 mm and a length of 254 mm was prepared.
[0233] (2) Formation of the middle layer
[0234] Using a bead mill, 300 parts by mass of titanium oxide fine particles (manufactured by TAYCA Co., Ltd., SMT-02), 100 parts by mass of copolyamide resin (manufactured by DAICEL-DEGUSSA Co., Ltd., X1010) and 1000 parts by mass of methanol as a solvent and 250 parts by mass of n-butanol were mixed and dispersed for 5 hours, and then filtered through a 5-micrometer filter to prepare a coating liquid for an intermediate layer.
[0235] Next, the pre-prepared substrate (supporting substrate) was dipped into the obtained coating solution for the intermediate layer at a speed of 5 mm / s with one end facing upward, thereby coating the substrate with the coating for the intermediate layer. cloth liquid. Then, this substrate was subjected to a cur...
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