摘要:
A kerosene composition is provided containing, in relation to the total composition, at least 99% by weight of n-paraffins and iso-paraffins, having the properties indicated by the following formulae: 6.0° C.≦FBP(end point)−95% distillation point≦11.0° C.; (A) 240° C.≦FBP≦270° C.; (B) 150° C.≦IBP(initial distillation point)≦165° C. (C)
摘要:
A fuel composition for diesel engines comprising: (1) up to 80% volume of one or more intermediate fractions selected from the group consisting of a straight-run ‘kerosene fraction, a straight-run light oil fraction, a cracked light oil fraction, a cracked kerosene fraction and hydrodesulphurised products of these; and (2) at least 20% volume of gas-to-liquid product, wherein, in a test of oxidation stability in accordance with the EN14112 test, the time until a change of electrical conductivity occurs at a liquid temperature of 150° C. is at least four hours.
摘要:
A lens array sheet, a transparent screen using the same, and a rear-projection display device are provided in which it is possible to control a perspective angle for the image in both a horizontal direction and a vertical direction without causing a problem in that a gain of a light is reduced by an optical absorption and an S/N ratio is reduced by an increased white dispersion. First lens and second lens arrays are formed by disposing a plurality of half-cylindrical lenses in parallel on a common plane such that longitudinal directions of the cylindrical lenses should be orthogonal to each other. A unified lens array layer and a shading layer in which a section through which a light does not transmit is formed on a focal plane of the lens array layer form a lens array sheet. Furthermore, fresnel lenses are combined so as to form a transparent screen.
摘要:
A kerosene composition is provided containing, in relation to the total composition, at least 99% by weight of n-paraffins and iso-paraffins, having the properties indicated by the following formulae: 6.0° C.≦FBP(end point)−95% distillation point≦11.0° C.; (A) 240° C.≦FBP≦270° C.; (B) 150° C.≦IBP(initial distillation point)
摘要:
A liquid crystal rear-projection TV screen has a double-side lens sheet and horizontal lenticular sheet. A vertical lenticular portion is disposed on the rear side of the double-side lens sheet, and Fresnel lens is disposed on the front side. A horizontal lenticular portion is disposed on the rear side of the horizontal lenticular sheet, and a light-shielding layer and protective resin substrate are disposed on the front side. The resin substrate of the double-side lens sheet has a low transmittance, and the resin substrates of the horizontal lenticular sheet have high transmittances. The observer recognizes an image on the double-side lens sheet arranged behind the light-shielding layer.
摘要:
A stirring device for molten metals such as aluminum. The device involves a mechanism which inserts and dips a nozzle-shaped stirring tube into a melting furnace through an insertion hole opened in the side wall of the furnace and stirs the molten metal using the stirring tube to repeatedly suck up and blow down the molten metal.The first claimed mechanism consists of the insertion hole opened through the sidewall at an angle and an external unit having a tilting and inserting mechanism to tilt the stirring tube and insert it into the insertion hole. The second claimed mechanism consists of a transportable structure which has a transferrable base provided with a support frame to mount the stirring tube connected to the tilting mechanism, a positioning mechanism to allow axial movement of the stirring tube, and other necessary operating units.
摘要:
An apparatus for treating a molten metal to a high quality by means of applying gas treating and filtration consecutively in a simple compact treating vessel. The vessel is divided into two parts, i.e., fluxing and filtration compartments, by a vertical partition wall having a molten metal passage therein integrally formed with the vessel, and a vacant space is left above the top of the partition wall and the ceiling of the vessel of sealed box type for allowing communication of the upper space above the bath level in both compartments. In two chambers formed in the fluxing compartment divided by a pair of dividers a respective gas treating device including a graphite pipe supplying treating gas and a rotor body to stir the molten metal is inserted from above. In the filtration compartment a plurality of tube filters are disposed for separating suspended particles before flowing the passed clean molten metal out of the vessel, and a gas burner of variable flame is mounted in the ceiling for heating the molten metal, and further a gas blowing means is disposed in the bottom thereof for blowing discrete bubbles of a gas upwards. A chimney is disposed in the ceiling of the fluxing compartment for discharging exhaust gases upwards.
摘要:
Monofluorobenzene is prepared in a good yield by reacting cyclopentadiene or its dimer of the formula: ##STR1## with fluorohalomethane of the formula:CHFX.sub.2wherein Xs are, same or different, halogen atoms in the presence of a phase transfer catalyst and an acid acceptor.
摘要:
Because an O-ring of synthetic resin is pyrolyzed in the atmosphere at a high temperature of 150° C. or more, the airtightness cannot be maintained. In an outside air shut-off container according to the present invention, an inert gas is supplied between an O-ring, which hermetically seals a process chamber and a cover member, and the outside air while a gas passage formed between the O-ring and the outside air is covered with a sealing cover. Additionally, an aluminum oxide layer is formed on a contact surface of the O-ring to increase the pyrolysis temperature of the O-ring.
摘要:
The present invention provides a method for producing a high-quality nonconductive or semi-conductive seamless (jointless) tubular polyimide film in a simple, efficient, and economical manner, and the like. More specifically, the invention relates to an electrically non-conductive or electrically semi-conductive seamless tubular polyimide film comprising polyimide having at least two aromatic tetracarboxylic acid derivatives comprising 15 to 55 mol % of asymmetric aromatic tetracarboxylic acid component and 85 to 45 mol % of symmetric aromatic tetracarboxylic acid component and at least one aromatic diamine component, in which, as required, a specific amount of carbon black is dispersed, and relates to a method for producing the same.