摘要:
A starting pitch for carbon fibers, obtained by (A) mixing (1) a heavy fraction oil boiling at not lower than 200.degree. C. obtained at the time of steam cracking of petroleum with (2) a hydrogenated oil selected from aromatic hydrocarbons of 2-10 rings in which the nuclei have been hydrogenated and specific fractions boiling at 160.degree.-650.degree. C. and containing such nuclei-hydrogenated hydrocarbons and then (B) heat treating the resulting mixed oil at 370.degree.-480.degree. C. and 2-50 Kg/cm.sup.2.G to obtain the starting pitch for carbon fibers.
摘要翻译:通过(A)混合(1)在石油蒸汽裂解时获得的沸点不低于200℃的重馏分油,(2)氢化油,所述氢化油选自: 其中核被氢化的2-10环,在160-65℃沸腾的特定馏分并含有这些核氢化烃,然后(B)在370-480℃下热处理所得混合油, 2-50kg / cm 2 G.以获得碳纤维的起始间距。
摘要:
Waste water containing finely divided oily materials and solid materials suspended therein can be clarified by (1) forwarding the waste water successively through a plurality of fibrous strata which are arranged along a path of the waste water and each of said strata is composed of a mass of hydrophilic organic polymer fibers compressed in such a manner that the closer the location of a fibrous stratum is to the supply source of the waste water, the greater the gaps on the average are formed between the fibers in the stratum, while allowing the particles of the finely divided oily materials to coarsen and to catch and collect finely divided solid materials into the coarsened particles; (2) after passing through each of the fibrous strata, introducing the waste water into a space in which the coarsened particles are allowed to float and form a separate layer of the oily materials containing the solid materials on the upper surface of the waste water in the space; (3) discharging the oily materials containing the solid materials from each of the separate layers; and (4) delivering the clarified water.
摘要:
A hollow fiber membrane module and potting material can be used for chemical deaeration in a semiconductor production process, in printers, in a liquid crystal sealing process or in a chemical production process. A hollow fiber membrane module 1 includes, as potting material 2, an epoxy resin cured product in which the weight change per unit surface area of a potting material test piece after immersing the test piece in a chemical for 6 months at room temperature is within the range of −20 to +20 mg/cm2, and as housing 4, a polyolefin in which the weight change per unit surface area of a test piece after immersing the test piece in a chemical for 6 months at room temperature is within the range of −20 to +20 mg/cm2, and the total metal content is 300 ppm or less. The module has a long service life when used for chemical treatment without leakage.
摘要翻译:中空纤维膜组件和灌封材料可用于半导体生产工艺,打印机,液晶密封工艺或化学生产过程中的化学脱气。 中空纤维膜组件1包括作为灌封材料2的环氧树脂固化产物,其中在室温下将试验片浸渍在化学品中6个月后,灌封材料试件的每单位表面积的重量变化在 范围为-20〜+20mg / cm 2,作为外壳4,在室温下将试验片浸渍在化学品中6个月后,试样的单位面积重量变化的聚烯烃在 -20〜+ 20mg / cm 2的范围,总金属含量为300ppm以下。 模块使用寿命长,化学处理无泄漏。
摘要:
The invention concerns a gas diffuser constructed and arranged to disperse gas into a aeration vessel of a water treatment assembly from a blower. The gas diffuser includes main pipes, branch pipes extending between the main pipes and containing gas discharge ports, wherein the branch pipes have a smaller cross-sectional area than the cross-sectional area of the main pipes. The gas discharge ports are further sized, constructed and arranged to reduce the possibility or likelihood of sludge from blocking the ports or entering the branch pipes. This object is achieved either by placement of the ports on the bottom sides of the branch pipes or, alternatively, by construction of the ports to include conduit members, themselves having an arrangement of openings or coverings to prevent or reduce the likelihood of sludge from blocking the ports or entering the branch pipes.
摘要:
An image projecting system is disclosed which is provided with a carrier part disposed in an optical path between a light source and an image receiver such as, for example, a screen and a sensitive medium and adapted to be loaded with a microfilm. Inside the image projecting system, masking members for adjusting the range of the optical path are fitted. These masking members rotate around the optical axis of the optical path. Even when an image happens to be photographed aslant in the microfilm, only a stated area of the image is projected on the image receiver.
摘要:
The present invention relates to a reader printer having a plurality of mode selection keys, ten-keys and a character display which displays a message indicating contents of input manipulations to be executed next with the ten keys in accordance with the mode selected by the mode selection keys whereby operating conditions of the reader printer under the selected mode are set by way of operator-to-machine conversation.
摘要:
A method for cleaning separating membranes uses a uniquely formulated detergent. The detergent includes a percarbonate-containing, material, existing in the condition in which hydrogen peroxide is adducted in carbonate and is desirably an alkali metal salt. The percarbonate decomposes the organisms deposited on the membrane surfaces while being environmentally desirable. The detergent preferably also includes at least one bivalent iron salt, which improves the cleaning capability of the percarbonate via the so-called Fenton's reaction in which hydrogen peroxide adducted in the percarbonate reacts with the iron ions to form OH— radicals which have a very high oxidative reactivity. The detergent may also contain other oxidizers, a surfactant, a chelating agent, an acid and a pH regulator. The detergent is dissolved in water prior to use.
摘要:
In a roll film carrier for a reader or a reader printer according to the invention, a first type film cassette and a second type film cassette being different from each other in connection system between a drive source and an enclosing reel within a cartridge can be installed detachably. The roll film carrier comprises a first reel drive shaft to drive an enlosing reel within a first type film cartridge and a second type reel drive shaft to drive an enclosing reel within a second type film cartridge, and selectively connects the reel drive shafts corresponding to type of the cartridge thereby cartridges of different types can be used.
摘要:
A mark detecting apparatus for a micro-roll film including one photoelectric element for detecting marks of different sizes provided on one edge portion of a micro-roll film for respective frames of the film, a pulse generating unit which generates pulses by radial slits formed in a disc adapted to be driven for rotation by contacting the micro-roll film, and a mark size judging circuit which counts the pulses produced from the pulse generating unit during the photoelectric element for the mark is detecting the mark of the film for judging the size of the mark by the counted value.