摘要:
An electrophotographic endless belt which contains a polyamide resin and an additive A comprising at least one selected from the group consisting of copper(I) iodide, potassium iodide, copper(I) chloride and potassium chloride, and has a volume resistivity of from 1×106 to 1×1014 Ωcm. Also disclosed are a process for producing the electrophotographic endless belt and an electrophotographic apparatus having the electrophotographic endless belt.
摘要:
An electrophotographic endless belt has a beltlike substrate and a meandering-preventive member attached to the inner peripheral surface of the beltlike substrate via a pressure-sensitive adhesive, double-coated tape. The pressure-sensitive adhesive, double-coated tape is a pressure-sensitive adhesive, double-coated tape having i) a reinforcing base material and ii) pressure-sensitive adhesive layers on both sides of the reinforcing base material. The reinforcing base material has a thickness of from 25 μm or more to 200 μm or less, and the pressure-sensitive adhesive layers on both sides each have a thickness of 200 μm or less and at least one of the pressure-sensitive adhesive layers has a thickness of from more than 100 μm to 200 μm or less, and the meandering-preventive member has a hardness of from 15° or more to 70° or less. Also disclosed are a process cartridge and an electrophotographic apparatus which have the electrophotographic endless belt as an intermediate transfer belt.
摘要:
In an electrophotographic endless belt having a beltlike substrate, a meandering-preventive member and a position detection member, the meandering-preventive member is disposed on the inner-periphery side of one end portion of the beltlike substrate, the position detection member is disposed on the outer-periphery side of the other end portion of the beltlike substrate, and the meandering-preventive member and the position detection member are 200 mm to 250 mm away from each other in the width direction of the electrophotographic endless belt. The beltlike substrate contains a thermoplastic resin as a binder resin, and the beltlike substrate has a 25 μm×25 μm surface total current value of from 300 nA to 2,000 nA at the time of application of 100 V as measured by SPM.
摘要:
An endless belt for electrophotography is disclosed which is obtainable continuously by melt extrusion from a circular die. The endless belt has a layer containing a thermoplastic resin having a diphenyl sulfone structure represented by the following Formula (1) Also disclosed are a process for producing the endless belt and an image forming apparatus having the endless belt.
摘要:
A process cartridge integrally supports therein a cylindrical latent-image-bearing member on which a toner image is formed and an intermediate transfer belt to which the toner image is primarily transferred and from which it is secondarily transported to a transfer medium. To prevent the latent-image-bearing member from being unwantedly triboelectrically charged during transportation, the cartridge satisfies any of requirements that A) the latent-image-bearing member has a surface potential Vt of −200 V≦Vt≦200 V when the intermediate transfer belt and the latent-image-bearing member are rubbed with each other, B) a spacer member is provided between the intermediate transfer belt and the latent-image-bearing member, and the latent-image-bearing member has a surface potential Vt of −200 V≦Vt≦200 V when the former and the latter are rubbed with each other, and C) the cartridge has a device for lowering contact pressure of the intermediate transfer belt against the latent-image-bearing member.
摘要:
A process cartridge detachably mountable on the main body of an electrophotographic apparatus, integrally supports a photosensitive drum for bearing toner images, and an intermediate transferring belt having a contact part with the photosensitive drum. The moisture amount of the intermediate transferring belt at 23° C./50% RH is less than 1% by weight and the sum of the surface roughness Ra of the photosensitive drum and the surface roughness Ra of the intermediate transferring belt is less than 0.8 &mgr;m. The present invention also provides an electrophotographic apparatus having the process cartridge and an image forming method using the electrophotographic apparatus.
摘要:
A process cartridge detachably mountable to the electrophotographic apparatus main body, integrally including an electrophotographic photosensitive member to carry a toner image; an intermediate transfer belt having a contact part with the photosensitive member; primary transfer member to primarily transfer the toner image from the photosensitive member to the intermediate transfer belt; and electric charge member to give electric charges in polarity opposite to the polarity of the toner at the time of the primary transfer to the toner on the intermediate transfer belt to return the toner on the intermediate transfer belt to the photosensitive member at the contact part to clean the intermediate transfer belt, wherein the intermediate transfer belt has an average glossiness of 30 to 90; glossiness deviation within 10; average film thickness of 40 to 200 &mgr;m; and film thickness unevenness within ±20% relative to the average film thickness. Also, an electrophotographic apparatus having the process cartridge and an image forming method using the electrophotographic apparatus are disclosed.
摘要:
A process cartridge is disclosed integrally supporting an electrophotographic photosensitive member, an intermediate transfer belt, a primary-transfer member for transferring a toner image primarily from the electrophotographic photosensitive member to the intermediate transfer belt and a charge-providing member for providing the toner on the intermediate transfer belt with electric charges having a polarity reverse to the polarity the toner has at the time of the primary transfer and returning the toner on the intermediate transfer belt to the electrophotographic photosensitive member at the contact zone to clean the intermediate transfer belt. The intermediate transfer belt has a modulus of elasticity of from 500 MPa to 4,000 MPa at elongation from 0.5% to 0.6% in the peripheral direction, a breaking extension of from 5% to 850% in the peripheral direction and a surface roughness Ra of 1 &mgr;m or less.
摘要:
An image performing apparatus and method for forming an image using a first image holding member and an intermediate transfer member for holding by primary transfer a toner image formed on the first image holder and for retransferring by secondary transfer the transferred toner image onto a second image holding member, wherein a contact angle between a surface layer of an intermediate transfer member and water is 50° to 120° and transfer-promoting particles are loaded onto the surface layer.
摘要:
An image forming apparatus and method includes a first image-bearing member, a latent image-forming device for forming an electrostatic latent image on the first image-bearing member, developer for developing the electrostatic latent image with a toner to form a toner image, an intermediate transfer member for receiving the toner image by primary transfer and transferring the toner image onto a second image-bearing member by secondary transfer, a charging member for charging a residual toner remaining on the intermediate transfer member after the secondary transfer, and a recovery member for recovering the charged residual toner at a recovery position by voltage application. The intermediate transfer member exhibits a charging characteristic such that it has a surface potential of at most 500 volts as an absolute value at the recovery position. The intermediate transfer member having such a charging characteristic is effective in suppressing an occurrence of electric discharge at the recovery position of the residual toner to provide an excellent cleaning performance.