摘要:
Two plastic tubelike members on which an annular protrusion or an annular groove are respectively provided to be used as two constructive block members for assembling valve or joint devices are directly coupled to assemble such devices. Critical dimensional relationships on the coupling end having the annular groove are established wherein a deformation process can be controlled to engage the annular groove with the annular protrusion by a radially widening motion and an axially spring motion in elastic dynamics, while the coupling end having the annular groove is softened by heating to become elastic. High coupling accuracy can be secured with high coupling strength and durability.
摘要:
A developing roller is provided, which is particularly used in an image forming apparatus of a highly durable design and is free from toner leakage even after formation of a predetermined number of images. Opposite end regions (5a) of an outer peripheral surface (5) of a roller body (2) of the developing roller (1) to be respectively kept in sliding contact with seal members each have a friction coefficient μ of not greater than 0.15.
摘要:
The present invention provides a conductive roller whose outermost layer is made of a vulcanized rubber composition. The vulcanized rubber composition contains epichlorohydrin rubber and chloroprene rubber as a rubber component thereof and 0.2 to 5 parts by mass of each of a thiourea-based vulcanizing agent and a vulcanization retarder consisting of N-(cyclohexylthio)phthalimide for 100 parts by mass of the rubber component.
摘要:
The present invention provides a conductive roller whose outermost layer is made of a vulcanized rubber composition. The vulcanized rubber composition contains epichlorohydrin rubber and chloroprene rubber as a rubber component thereof and 0.2 to 5 parts by mass of each of a thiourea-based vulcanizing agent and a vulcanization retarder consisting of N-(cyclohexylthio)phthalimide for 100 parts by mass of the rubber component.
摘要:
A method of producing a conductive belt composed of a base resin containing polybutylene naphthalate resin at not less than 50 mass % nor more than 100 mass % and 1 to 3 mass % of carbon nano-fibers having a DBP oil absorption amount at not less than 150 ml/100 g. The method includes the steps of forming a conductive master batch by mixing the carbon nano-fibers with resin for use in a master batch containing the polybutylene naphthalate resin; mixing the obtained conductive master batch and resin for blending use containing the polybutylene naphthalate resin and not containing the carbon nano-fibers with each other in an unmelted state by setting a mixing mass ratio of the conductive master batch smaller than that of the resin for blending use; and meltingly molding an obtained mixture by an extrusion molder.
摘要:
A laminated seamless belt having at least a base layer and an outer layer. The base layer contains a polyester thermoplastic elastomer as its main component. The base layer has a volume resistivity set to not less than 1.0×106(Ω·cm) nor more than 1.0×1011(Ω·cm). A volume resistivity of the outer layer is set to not less than 1.0×1011(Ω·cm) and not less than 10 times as large as that of the base layer. The base layer and the outer layer are formed by laminated extrusion.
摘要:
Delay distribution in an integrated circuit is calculated while taking into account a correlation of performance between interconnects or elements in the integrated circuit, thereby improving estimation accuracy. Circuit information, performance distribution information of the interconnects or elements in the integrated circuit, and correlation information of performance between the interconnects or elements are input. A vertex is selected for calculation, and a correlation between delay distribution at the selected vertex and delay distribution in a partial circuit including the selected vertex is calculated based on the performance distribution information and the correlation information.
摘要:
The invention provides a functional module model for realizing optimal pipelining. The functional module model includes division line data representing division lines corresponding to positions where pipeline registers can be inserted and delay/area data representing the trade-off relationship between the delay and the area of each division area partitioned by the division lines. By using this functional module model, a pipeline register insertion position is selected among the division lines represented by the division line data, and the delay and the area of each division area are set on the basis of the trade-off relationship represented by the delay/area data. Thus, a pipelined circuit with a minimized area can be synthesized.
摘要:
There is provided a honeycomb structural body with a lower-than-conventional heat capacity and excellent durability. A honeycomb structural body (1) having partition walls composed mainly of cordierite arranged in a honeycomb fashion is provided with fortified section (2) with a higher strength than the general section (19) at one end or both ends (11) in the direction of length of the partition walls (10). The fortified section (2) is given improved strength by having increased density with respect to the general section.
摘要:
Tpresent invention provide a biocompatible polyurethane or oplyurethane urea containing, in the side chain, phosphorylcholine structure represented by the formula (1) ##STR1## wherein R.sup.1 is C.sub.1-20 alkyl, C.sub.6-12 aryl, C.sub.7-20 aralkyl or a group of the formula:R.sup.4 -(A).sub.n -(wherein A is C.sub.2-10 oxyalkylene, and (A).sub.n may be constituted of one kind of oxyalkylene groups or of two or more kinds of oxyalkylene groups linked together in blocks or at random; n is an integer of 1 to 30; and R.sup.4 is C.sub.1-20 alkyl, C.sub.6-12 aryl or C.sub.7-20 aralkyl); and R.sup.2 and R.sup.3 each represent C.sub.1-20 alkyl, C.sub.6-12 aryl or C.sub.7-20 aralkyl and may be the same or different; and an antithrombogenic medical product prepared using the polyurethane or polyurethane urea.