摘要:
A magnetic recording medium is described, comprising a support and a magnetic layer disposed thereon, said magnetic layer containing as its binder component a combination of at least one member of each of the following groups of compounds (1) to (3) that has been exposed to electron beams:(1) vinyl chloride type resin, vinyl acetate type resin, vinyl chloride-vinyl acetate type resin, each containing from 5.times.10.sup.-5 to 2.times.10.sup.-3 equivalents of --CO.sub.2 H groups per gram of copolymer, and nitrocellulose resin;(2) urethane resins and urethane-acrylate oligomers; and(3) compounds containing an isocyanurate ring and at least two groups selected from acryloyl and methacryloyl groups.
摘要:
The present invention relates to a magnetic recording medium prepared by the process comprising (1) coating a magnetic coating composition mainly containing ferromagnetic particles and a binder on a support and (2) irradiating the resulting support with electron beams, wherein the binder contains a compound represented by the following formula, ##STR1## wherein A represents a radical of a hydroxy compound containing at least one isocyanurate ring and at least one (meth)acryloyl group; DI represents a radical of an organic diisocyanate compound; B represents a radical of a polyol having at least two hydroxy groups; C represents a radical of a polybasic acid having at least two carboxy groups; m is a number of 1 to 7; and N is a positive number of 7 or less.
摘要:
There is provided a magnetic recording material produced by coating on a support a magnetic coating composition which contains as main components a magnetic powder and a binder, the binder comprising an urethane acrylate synthesized using a polyester polyol having a particular structure, and by irradiating the resulting magnetic coat with electron beams to harden it. The polyester polyol contains polyhydric alcohol component, 50 mole % or more of which is a dihydric alcohol selected from the class (A) described below, and/or polybasic acid component, 50 mole % or more of which is a dibasic acid selected from the class (B) described below. The urethane acrylate is synthesized under such a condition that it may have two or more of (meth)acryloyl groups per molecule. Thus, improvements in electromagnetic properties and in durability are attained.Class (A): Alkyl-substituted aliphatic dihydric alcohols, alicyclic dihydric alcohols, and dihydric alcohols made by addition of alkylene oxides to alicyclic or aromatic dihydric alcohols.Class (B): Alicyclic dicarboxylic acids and aromatic dicarboxylic acids.
摘要:
A vacuum deposition device, wherein an evaporation source 2 and a deposited body 3 are disposed in a vacuum chamber 1 and a space between the evaporation source 2 and the deposited body 3 is surrounded by a tubular body 4 heated at a temperature for vaporizing the substances of the evaporation source so that the substances vaporized from the evaporation source 2 can reach the surface of the deposited body 3 through the inside of the tubular body 4 and then be deposited thereon, and a control member 8 for controllably guiding the movement of the vaporized substances to the deposited body 3 inside the tubular body 4 is installed in the tubular body 4, whereby the distribution of the vaporized substances adhered onto the deposited body can be controlled so that deposition with uniform film thickness can be performed on the deposited body and, as the case may be, the deposition can be performed with an intentionally set film thickness distribution.
摘要:
A power supply for negative impedance discharge loads such as discharge tubes used in gas laser systems, in which the discharge power is supplied not from the voltage source but from the current source through the current transformer so that stabilized and well balanced discharge currents can be supplied to a plurality of discharge loads.
摘要:
A turbine helper drive apparatus has an induction motor coupled to a turbine, and a power converter for power-controlling the motor. Part of the load of the turbine is shared by the motor in accordance with preset power for power control, so that auxiliary drive to compensate for the insufficient capacity of the turbine is performed and cheaper, late-night electric power is effectively utilized.
摘要:
A vacuum deposition device, wherein an evaporation source 2 and a deposited body 3 are disposed in a vacuum chamber 1 and a space between the evaporation source 2 and the deposited body 3 is surrounded by a tubular body 4 heated at a temperature for vaporizing the substances of the evaporation source so that the substances vaporized from the evaporation source 2 can reach the surface of the deposited body 3 through the inside of the tubular body 4 and then be deposited thereon, and a control member 8 for controllably guiding the movement of the vaporized substances to the deposited body 3 inside the tubular body 4 is installed in the tubular body 4, whereby the distribution of the vaporized substances adhered onto the deposited body can be controlled so that deposition with uniform film thickness can be performed on the deposited body and, as the case may be, the deposition can be performed with an intentionally set film thickness distribution.
摘要:
A high-speed data processor capable of processing a special operation instruction such as a sequence operation instruction which is different from a normal execution instruction at high speeds. The high-speed data processor is capable of simultaneously reading and executing a special operation instruction which is a sequence operation instruction, even if an instruction prefetchable CPU is used, so that its data processing speed can be improved. Further, the data processor is also capable of causing the CPU to rapidly return from exceptional processing such as interrupt processing when the special operation is being executed, without making the operation result incorrect nor requiring any large instruction memory.
摘要:
In an overhead-valve type internal combustion engine, a crank chamber is connected in communication with one side portion of a valve actuating mechanism chamber through a breather passage composed of a passage inlet a passage portion, an outlet chamber and a passage outlet communicated to one another in order. The outlet chamber is formed in the space outside the one side portion of the valve actuating mechanism chamber so as to extend long in the direction of side-by-side arrangement of valve stems. The passage outlet is opened long in the direction of side-by-side arrangement of the valve stems in such a manner as to face the valve stems. A portion, on the side of the passage outlet, of the ceiling surface of the valve actuating mechanism chamber is formed as an inclined surface which increases its height dimension as it gets nearer to the side of rocker arms from the side of the passage outlet.