摘要:
The invention provides a polyolefin-based rubber composition capable of giving a vulcanizate having excellent flame retardancy along with high mechanical strengths. The composition comprises: (A) 100 parts by weight of a polyolefin-based synthetic rubber, e.g. EPDM rubber; (B) 1 to 100 parts by weight of an organopolysiloxane; (C) 1 to 100 parts by weight of a bromine-containing flame retardant agent and/or red phosphorus; (D) 5 to 200 parts by weight of aluminum hydroxide and/or magnesium hydroxide; and (E) 0.5 to 20 parts by weight of zinc carbonate and/or manganese carbonate.
摘要:
A method and apparatus for preparing a microscopic specimen by lifting up coverslips in a piled state one by one, comprises a step of means for holding the upper-most coverslip on one spot on its upper surface and pushing the same on another spot on one end portion of its upper surface apart from the holding spot in a longitudinal direction of the coverslip. The holding spot of the coverslip is then lifted and, with a delay time; the pushing spot of the coverslip is lifted so as to bend the coverslip while it is held, within its elastic limit edge of the coverslip is then pushed downwardly to bend the coverslip and cause another coverslip which may be stuck to the bottom of the uppermost coverslip, to drop off. The curvature is then eliminated.
摘要:
A papery product consisting essentially of a fibrous web, at least part of said web being made of a wholly aromatic polyamide fiber having a readily soluble skin layer and a sparingly soluble or insoluble core layer, and pressure and heat being applied to said web. Said product is excellent in its mechanical and heat-resisting properties.
摘要:
An aromatic polyamide fiber having an excellent dyeing property has a core-in-sheath type structure, in which the core portion is insoluble and the sheath portion is soluble in N-methyl-2-pyrrolidone at 35.degree. C.
摘要:
An aromatic polyamide composition which is suitable for producing filaments or fibers having an excellent heat-resisting property and a superior dyeing property, which comprises:(A) 50 to 95% by weight of poly-m-phenylene isophthalamide, and;(B) 5 to 50% by weight of at least one other aromatic polyamide comprising:(1) an amine moiety consisting essentially of (a) 35 to 100 molar % of at least one xylylene diamine and, (b) 0 to 65 molar % of at least one other aromatic diamine, and;(2) an acid moiety consisting essentially of at least one aromatic dicarboxylic acid.
摘要:
A disk-shaped magnet attached to a rotary shaft is circumferentially segmented into a plurality of segments which are magnetized to form driving magnetic poles. A plurality of velocity detecting magnetic poles are also arranged on the disk-shaped magnet concentrically to the driving magnetic poles. The number of the velocity detecting magnetic poles is larger than the number of the driving magnetic poles to increase the frequency of an output signal of a velocity detecting coil which interlinks with the velocity detecting magnetic poles so that a response speed of a velocity control circuit is increased.
摘要:
A disc record player in which a turntable is driven by a motor comprising a rotor magnet having plural magnetic poles arranged separately along the periphery of the turntable, stator coils disposed in the magnetic field of the rotor magnet and Hall-effect elements sequentially coupled magnetically to the poles of the rotor magnet for generating output signals having polarities corresponding to the polarities of the poles of the rotor magnet, and causing the rotor magnet to rotate by supplying the output signals of the Hall-effect elements to the stator coils, wherein a first and a second speed detecting coils for generating signals having phases different from each other are disposed in the magnetic field of the rotor magnet, wherein the output signals of the first and second speed detecting coils respectively turn the gate circuit off and on and when the turntable is to be stopped, the gate circuit is turned on by the output signal of the second speed detecting coil, and wherein the rotation of the turntable is damped by controlling the polarities of the output signals of the Hall-effect elements with the output signal of the gate circuit and thereby causing the stator coils to generate the magnetic flux to rotate the rotor magnet in the reverse direction.
摘要:
A vacuum chamber includes: a vacuum vessel arranged at the backward side, where a wafer of a processing subject is processed inside an internal processing chamber; a transfer chamber arranged at the forward side, where said wafer is transferred at the inside thereof under atmospheric pressure; a cassette stage arranged at the forward of this transfer chamber, where a cassette storing said wafer is mounted; a lock chamber connected with said transfer chamber at the backward of said transfer chamber; a robot arranged inside said transfer chamber, where said wafer is transferred between said cassette and said lock chamber; and an aligning machine for making position of said wafer fit with the predetermined position, wherein the wafer is transferred to said lock chamber, after performing alignment of said wafer on said aligning machine, in the case where displacement amount of position of this wafer is larger than the predetermined value.
摘要:
The present invention provides a process of producing an activated carbon for an electric double layer capacitor, which can produce easily and inexpensively an activated carbon free from fusing of carbon particles during activation and having a small diameter, a uniform particle diameter, and a relatively large specific surface area on a commercial scale. The process comprises the steps of calcining an easily graphitizable carbon material so that the reduction rates of the hydrogen/carbon atomic ratio (H/C) and the volatile components in the carbon material are 4 percent or more and 5 percent or more, respectively after calcination and activating the carbon material thereby producing an activated carbon for an electric double layer capacitor, having an average particle diameter of 0.5 to 7 μm and a BET specific surface area of 1500 to 3000 m2/g.
摘要:
A power supply unit superimposes alternating-current voltage on direct-current voltage and applies it to a motor. As a result, when the motor is rotated, a current containing an alternating-current component flows. Further, the motor includes a capacitor connected in parallel with one phase coil. Owing to this capacitor, the impedance of the motor circuit between brushes is varied according to the rotation of the motor. Variation in impedance appears as variation in the amplitude of the alternating-current component in motor current. A signal processing unit extracts an alternating-current component from the motor current detected by the current detection unit and generates a rotation pulse corresponding to variation in the amplitude. A rotation angle detection unit detects the rotation angle of the motor based on this rotation pulse.