摘要:
A toner for developing an electrostatic image has colorant-containing resin particles and amorphous fine titanium oxide particles comprising primary particles having an average particle diameter of from 1 m.mu. to 200 m.mu..
摘要:
A toner for developing an electrostatic image has colored resin particles-(A) containing a coloring agent or a magnetic powder, and a powdery additive. The powdery additive has organic resin particles-(B) having peaks respectively in a region of particles diameters of 20 m.mu. to 200 m.mu. and a region of particle diameters of 300 m.mu. to 800 m.mu. in their particle size distribution, and the larger-diameters particles included in the region of particle diameters of 300 m.mu. to 800 m.mu. being contained in an amount of from 2% by weight to 20% by weight.
摘要:
In an electrophotographic endless belt having a resin layer formed of a resin composition containing a polyamide, the resin composition further contains a copolymer obtained by copolymerization of an olefin and an oxygen-containing heterocyclic compound, a curve (T-log10 η curve) showing the relationship between temperature T (° C.) and common logarithm log10 η of melt viscosity η (Pa·s), of the resin composition has, in the range of log10 η of from log10 1,000 to log10 8,000, a gently inclined region the inclination Δ log10 η/ΔT of which is from −0.02 to 0, and the gently inclined region has a temperature range of 10° C. or more, and the resin layer has a thickness the maximum thickness of which is 115% or less of the average value of the thickness of the resin layer and the minimum thickness of which is 85% or more of the average value of the thickness of the resin layer. Also disclosed is a process for producing the above electrophotographic endless belt.
摘要:
An electrophotographic endless belt containing a polyamide resin, carbon black and a filler, characterized in that the polyamide resin is at least one resin selected from the group consisting of polyamide 610, polyamide 612, polyamide 11 and polyamide 12, the filler is at least one filler selected from the group consisting of an oxide, a hydroxide, a carbonate and a silicate, and weight (A) of the polyamide resin and total weight (B) of the carbon black and the filler is in a ratio (A:B) of from 90:10 to 50:50. Also disclosed are an electrophotographic apparatus having the electrophotographic endless belt, and a process for producing the electrophotographic endless belt.
摘要:
An intermediate transfer member suitable for full-color image formation by electrophotography is formed by an elastic base layer and a fibrous core member embedded with the base layer. The core member is formed of fibers which are disposed within the base layer at a spacing between adjacent fibers of 50-3000 &mgr;m. As a result, the intermediate transfer member is reinforced to exhibit improved superposed transfer performance free from color deviation while retaining good transfer performance.
摘要:
A transfer belt having a long service life and an image forming apparatus provided with the belt are provided. A serpentine motion preventing member (6b,) provided on at least one side portion of an inner circumferential surface of an endless belt body (6a, 61a) on which a toner image formed on an image bearing member is transferred on an outer circumference and retained by a retainer groove (R1) formed on a roller serpentine motion preventing member (6b, 61b) away from the belt body (6a, 61a). Accordingly, damage to the belt body (6a, 61a) is prevented.
摘要:
This invention relates to an image forming apparatus comprises an image bearing member for bearing a toner image, an intermediate transfer member for allowing the toner image on the image bearing member to undergo electrostatic primary transfer thereto at the position of primary transfer and then enabling the toner image deposited thereon to undergo secondary transfer to a transfer material, and a charging member for charging a residual toner remaining on the intermediate transfer member after the second transfer of the toner image on the intermediate transfer member to a transfer material and consequently causing the residual toner charged by the charging member to be transferred at the position of primary transfer to the image bearing member. Wherein the sum of the surface roughness, Rz, of the intermediate transfer member and that of the charging member is not less than 1 .mu.m and not more than 50 .mu.m.
摘要:
An electrophotographic endless belt containing a polyamide resin, carbon black and a filler, characterized in that the polyamide resin is at least one resin selected from the group consisting of polyamide 610, polyamide 612, polyamide 11 and polyamide 12, the filler is at least one filler selected from the group consisting of an oxide, a hydroxide, a carbonate and a silicate, and weight (A) of the polyamide resin and total weight (B) of the carbon black and the filler is in a ratio (A:B) of from 90:10 to 50:50. Also disclosed are an electrophotographic apparatus having the electrophotographic endless belt, and a process for producing the electrophotographic endless belt.
摘要:
A process cartridge integrally supports an electrophotographic photosensitive member, an intermediate transfer belt, primary transferer for transferring a toner image primarily from the member to the belt, a charge provider for providing the toner on the 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 belt to the member at a contact zone to clean the belt, and an electrophotographic-photosensitive-member cleaner. The cartridge is dividable into an electrophotographic photosensitive member unit and an intermediate transfer belt unit and has a joining unit which joins the two units. The peripheral length and average thickness of the belt and the diameter of at least one of rollers over and around which the belt is placed satisfy specific conditions.
摘要:
A process for producing an endless belt includes melt-extruding an extrusion material into a cylinder by means of an extruder, where the extrusion material has a tensile break strength of 400 kgf/cm2 or above and a breaking extension of from 3.0% to 250%, and where the extrusion material is extruded in an extrusion ratio of from 1.05 to 2.80 while a gas is blown into the inside of the melt-extruded cylindrical product.
摘要翻译:用于生产环形带的方法包括通过挤出机将挤出材料熔融挤出到圆筒中,其中挤出材料的拉伸断裂强度为400kgf / cm 2以上,断裂伸长率为3.0%〜250% ,并且当挤出材料以1.05至2.80的挤出比挤出时,同时将气体吹入熔融挤出的圆柱形产品的内部。