摘要:
A nitrile group-containing highly saturated copolymer rubber which is a product obtained by hydrogenating the conjugated diene portion of an unsaturated nitrile-conjugated diene copolymer. The highly saturated copolymer rubber has an alkylthio group having 12 to 16 carbon atoms, which include at least three tertiary carbon atoms, and having a sulfur atom which is directly bound to at least one of the tertiary carbon atom, and the highly saturated copolymer rubber further has a Mooney viscosity of 15 to 200 and an iodine value not larger than 80. The highly saturated copolymer rubber is produced copolymerizing an unsaturated nitrile, a conjugated diene and an optional copolymerizable monomer by using as a molecular weight modifier an alkylthiol compound having 12 to 16 carbon atoms, which include at least three tertiary carbon atoms, and having a sulfur atom which is directly bound to at least one of the tertiary carbon atoms; and then, hydrogenating the thus-obtained copolymer. The highly saturated copolymer rubber exhibits a high-rate vulcanizability when vulcanized with a sulfur-containing vulcanizer.
摘要:
A composite comprised of a nitrile group-containing highly saturated copolymer rubber and a fibrous material, which copolymer rubber is a product obtained by hydrogenating the conjugated diene portion of an unsaturated nitrile-conjugated diene copolymer. The highly saturated copolymer rubber has an alkylthio group having 12 to 16 carbon atoms, which include at least three tertiary carbon atoms, and having a sulfur atom which is directly bound to at least one of the tertiary carbon atoms; and the copolymer rubber further has a Mooney viscosity of 15 to 200 and an iodine value not larger than 80. This composite is useful for a belt.
摘要:
An adhesive composition comprised of (A) a latex of 100 wt. parts of a carboxyl group-containing highly saturated nitrile-conjugated diene copolymer rubber, (B) 5-30 wt. parts of a resorcinol-formaldehyde resin, and (C) 2-10 wt. parts of an aromatic epoxy resin. A composite comprised of a nitrile group-containing highly saturated copolymer rubber and a fibrous material, which has been treated with the adhesive composition. This composite is useful for belts.
摘要:
A reinforcing fiber for a rubber product that has excellent heat resistance, water resistance and resistance to flex fatigue without undergoing a complicated production process and a treatment agent therefore. This treatment agent comprises a rubber latex, a resorcin-formaldehyde water-soluble condensate and triazine thiol.
摘要:
An adhesive composition comprised of (A) a latex of a self-crosslinking, carboxyl group-containing highly saturated nitrile-conjugated diene copolymer rubber containing 0.3-10 wt. % of self-crosslinking monomer units, and (B) a resorcinol-formaldehyde resin. A composite comprised of a fibrous material, which has been treated with the adhesive composition, and a nitrile group-containing highly saturated copolymer rubber. This composite is useful for belts.
摘要:
Apparatus for controlling the speed of advancement of a magnetic tape in a video tape recordor (VTR) of the type including a rotary magnetic head assembly for recording and reproducing an information signal with respect to a plurality of record tracks extending obliquely on a magnetic tape, comprises a recording section including a control signal generator which generates a control signal, a pilot signal generator which generates a pilot signal having a predetermined frequency, an AM modulator which amplitude modulates the pilot signal by the control signal to produce a superimposed or amplitude-modulated signal which is recorded in a control track on the magnetic tape by a fixed magnetic head; and a reproducing section including the fixed magnetic head for reproducing the superimposed signal recorded in the control track on the magnetic tape, a limiter circuit for detecting the pilot signal from the reproduced superimposed signal, an FM detector for detecting a frequency fluctuated component of the detected pilot signal, an envelope detector for reproducing or detecting the control signal from the reporduced superimposed signal, and a servo circuit for controlling a drive motor for the magnetic tape in response to the detected control signal and the detected frequency fluctuated component of the pilot signal so that wow and flutter in the detected control signal are eliminated or substantially reduced by the detected frequency fluctuated component of the pilot signal, and a constant speed of advancement of the magnetic tape is achieved.
摘要:
A device detects a quantity of waste liquid without using a special sensor by subtracting total use of liquid from total consumption of liquid and regarding the differential as the quantity of waste liquid. The device includes a first unit for accumulating liquid consumption for a period from the start of using a liquid container up to the present to obtain and store total consumption, a second unit for accumulating liquid quantity used for the operation by the operation unit for the period to obtain and store total use, a third unit for subtracting the total use from the total consumption to obtain the waste liquid quantity, a fourth unit for comparing the obtained waste liquid quantity with a predetermined upper limit on waste liquid quantity, and a fifth unit for informing that the waste liquid quantity exceeds the upper limit.
摘要:
In a liquid-discharging apparatus, the work volume of a cleaning roller of a liquid-discharging head and the work volume of a waste-liquid receiver of a head cap are displayed. A dot array or a dot is formed by discharging a predetermined liquid from a plurality of liquid-discharging nozzles provided on a nozzle surface of the liquid-discharging head. The liquid-discharging apparatus includes a roller-wiping-count storage unit for storing the accumulated work volume of the cleaning roller during a period from the beginning of use to the present time, an idle-discharging-count storage unit for storing the accumulated work volume of the waste-liquid receiver during the period, and an information output unit that receives the work volumes from the storage units, and that outputs both of or the higher one of the work volumes.
摘要:
A communication system for video information apparatus for carrying out a communication between a video information apparatus and a peripheral apparatus arranged so that a communication is repeatedly carried out at a period synchronized with a signal of a vertical period having a constant phase relation relative to a vertical synchronizing signal.
摘要:
According to the present invention, after a predetermined voltage is applied to a coil in a state in which the inside of an electric compressor is filled with dielectric liquid and the coil of a motor is immersed in the dielectric liquid, in a first test process, a test product in which a current value when a first predetermined time T1 elapses I1 is less than or equal to a first reference current value is determined as an acceptable product, in a second test process, among the test products in which the current value is greater than the first reference current value in the first test process, a test product in which a current value I2 when a second predetermined time T2 longer than the first predetermined time elapses is less than or equal to a second reference current value is determined as an acceptable product, a test product in which the current value is greater than the second reference current value is determined as a disqualified product, and the first reference current value is a predictive reference current value that allows a test product which is to be determined as a disqualified product in the second test process to be determined as a disqualified product in the first test process, and allows some test products which are to be determined as an acceptable product in the second test process to be determined as a disqualified product in the first test process.