摘要:
A method of manufacturing acrylic fibers free from delustering in boiling water, comprises the steps of forming a spinning solution by dissolving in a solvent of acetone, acetonitrile, dimethylformamide and mixtures thereof, (a) a copolymer consisting of (1) 30 - 80% acrylonitril and (2) 70 - 20% vinyl chloride or vinylidenechloride, or (b) a tripolymer consisting of (1), (2) and (3) 3.0% or less by weight of ethylenically unsaturated monomer having hydrophilic groups, and adding one or more compound selected from the group of (1) homopolymer or copolymer of glycidyl methacrylate and (2) specific organic tin compounds, and spinning said spinning solution into a first bath consisting of 60% or less said organic solvent-water and leading said yarn in a 2nd bath consisting of 61 - 85% said organic solvent-water and then in a 3rd and more bath consisting of less than 60% said organic solvent-water and drying, drawing out and annealing said yarn by ordinary methods.
摘要:
Compounds having the formula ##EQU1## wherein R is alkyl group having 6 to 22 carbon atoms, M is H, Li, Na, K or NH.sub.4 and n is an integer of 2 to 4, inclusive. The compound is useful as polymerizable emulsifying agent, and enables to improve properties of produced polymer and to provide a modacrylic fiber superior in heat stability and fastness to light. The aqueous emulsion polymerization of .alpha.,.beta.-ethylenically unsaturated monomer by the use of the polymerizable anionic emulsifying agent is capable of preventing a discharge of an environmental pollutant.
摘要:
Provided is a pulse modulation circuit capable of generating a pulse modulation signal with a steep rise and a desired pulse width at a desired timing not depending on a transmission signal sequence. In this circuit, a control signal generation unit (110) generates a first control signal if transmission data (S11) is “1” and a second control signal if the transmission data (S11) is “0.” The control signal generation unit (110) controls an oscillator (1200) of an intermittently operating circuit (120) to be at an oscillation state for outputting a desired first oscillation signal while the first control signal is turned ON and controls the oscillator (1200) to be at an idling state for outputting a second oscillation signal having a lower amplitude than the first oscillation signal while the second control signal is turned ON.
摘要:
The object of the present invention is to provide a technique for accurately transmitting information, wherein optical signals are the medium of information, between circuit boards.A holding member 10 taught in the present specification holds a plurality of circuit boards 20 with a predetermined distance therebetween, and provides an optical communication path between the circuit boards 20. The holding member 10 comprises a body 15 and an optical waveguide 12 that penetrates the body 15. The holding member 10 further comprises a light receiving portion 50 and a light emitting portion 40. By means of the holding member 10, an optical signal emitted at one circuit board 20 and received at an other circuit board 20 travels along the optical waveguide 12 of the holding member 10.
摘要:
Provided is a pulse modulation circuit capable of generating a pulse modulation signal with a steep rise and a desired pulse width at a desired timing not depending on a transmission signal sequence. In this circuit, a control signal generation unit (110) generates a first control signal if transmission data (S11) is “1” and a second control signal if the transmission data (S11) is “0.” The control signal generation unit (110) controls an oscillator (1200) of an intermittently operating circuit (120) to be at an oscillation state for outputting a desired first oscillation signal while the first control signal is turned ON and controls the oscillator (1200) to be at an idling state for outputting a second oscillation signal having a lower amplitude than the first oscillation signal while the second control signal is turned ON.
摘要:
A motor controller includes: an estimated temperature calculating section that calculates and stores an estimated temperature of a motor, and a control section that can perform a drive control of the motor only when this estimated temperature is not larger than a predetermined value. When the motor is stopped, a second temperature gradient while the temperature of the motor decreases from a stop-time temperature to a predetermined first set temperature is stored in correspondence to the stop-time temperature. The first temperature gradient corresponding to the estimated temperature at a time when the motor is stopped is calculated by using the first temperature gradient storing means, if the estimated temperature stored in the estimated temperature storing means when the motor is stopped is larger than the first set temperature. The estimated temperature stored in the estimated temperature storing means is updated according to a lapse of a stopping time of the motor by using the first temperature gradient calculated by the first temperature gradient calculating means.
摘要:
In the optical fiber collimator according to the invention, a transparent block having a refractive index that is substantially the same as the refractive indices of the lens and optical fiber is disposed between the lens and ferrule so that the block contacts the lens, ferrule, and optical fiber. The thickness of the block in the direction of beam transmission is set to be the same as the distance to the focal point from the end surface of the lens that is determined by the diameter and refractive index of the lens and the refractive index of the block.
摘要:
A motor controller is provided with: an estimated temperature calculating means that calculates an estimated temperature of a motor; and a control unit that can perform a driving control of the motor only when the estimated temperature is not larger than a predetermined value. A mode switching means switches the control unit and the estimated temperature calculating means between in a normal operation mode in which they can drive the motor and in a sleep mode in which electric power consumption thereof is smaller than in the normal operation mode in accordance with a predetermined condition while the motor is stationary. An activating means activates the estimated temperature calculating means in the sleep mode for a predetermined active time every time a predetermined sleep time is elapsed.
摘要:
A design support system comprising a digital document related module for storing a digital document used for a design operation, a geometry data related module for storing geometry data designed during the design operation, and a reference relationship related module for generating reference relationship information (a digital document that includes a reference relationship to geometry data, or geometry data that include a reference relationship to a digital document) that is established between a specific digital document and specific geometry data. To display the reference relationship from the digital document to the geometry data, the digital document related module calls up and displays the digital document, while adding and displaying information to the digital document concerning a link to the reference target geometry data.
摘要:
When a conventional semiconductor container opening/closing apparatus opens a lid of a semiconductor container, foreign particles enter into the container from outside through a gap between the container and a wall surface of the container opening/closing apparatus and adhere to a wafer in the container. A method is provided to reduce the number of foreign particles adhering to the wafer by preventing foreign particles from entering into the container at the time of opening the container by the opening/closing apparatus. To achieve this, a velocity-differential pressure ratio obtained by dividing the maximum velocity at the time of opening the lid of the container in a vertical direction to an opening of the container, by the differential pressure between the inside pressure and the outside pressure of said semiconductor manufacturing apparatus, is set to be 0.06 ((m/s) Pa) or less.