摘要:
The present invention aims to provide a polypropylene fiber (PP fiber) excellent in strength, heat resistance, and water-absorption properties, a method of producing the same, and a hydraulic composition, a rope, a sheet-shaped fiber structure, and a composite material with an organic polymer each using the PP fiber. The present invention provides: a PP fiber having a fiber having a fiber strength of 7 cN/dtex or more and having either or both of (i) DSC properties such that the endothermic peak shape by DSC is a single shape having a half width of 10° C. or lower and the melt enthalpy change (AH) is 125 J/ g and (ii) irregular properties such that the single fiber fineness is 0.i to 3 dtex and irregularities are formed on the surface.
摘要:
The present invention aims to provide a polypropylene fiber (PP fiber) excellent in strength, heat resistance, and water-absorption properties, a method of producing the same, and a hydraulic composition, a rope, a sheet-shaped fiber structure, and a composite material with an organic polymer each using the PP fiber. The present invention provides: a PP fiber having a fiber strength of 7 cN/dtex or more and having either or both of (i) DSC properties such that the endothermic peak shape by DSC is a single shape having a half width of 10° C. or lower and the melt enthalpy change (AH) is 125 J/g and (ii) irregular properties such that the single fiber fineness is 0.1 to 3 dtex and irregularities are formed on the surface, the irregularities having an average interval of 6.5 to 20 μm and an average height of 0.35 to 1 μm as a result of alternate presence of a protruded portion having a large diameter and a non-protruded portion having a small diameter along its fiber axis; a method of producing the PP fiber by pre-drawing an undrawn PP fiber having an IPF of 94% or more at 120 to 150° C. at a drawing magnification of 3 to 10 times, and then post-drawing the resultant at 170 to 190° C. and a drawing magnification of 1.2 to 3.0 times under the conditions of a deformation rate of 1.5 to 15 times/min and a draw tension of 1.0 to 2.5 cN/dtex; and a hydraulic composition, a rope, a sheet-shaped fiber structure, and a composite material with an organic polymer each using the PP fiber.
摘要:
In an elastic-wave filter device that includes a band-pass filter and a band-eliminate filter connected to the band-pass filter, insertion loss in a pass band is significantly reduced and attenuation in a stop band is significantly increased. The elastic-wave filter device has a pass band and a stop band at frequencies higher than the pass band. The band-pass filter and the first band-eliminate filter are connected in series between an input terminal and an output terminal. A first parallel-arm resonator of the first band-eliminate filter includes a first resonance frequency in the stop band. A second parallel-arm resonator includes a second resonance frequency in the stop band, the second resonance frequency being higher than the first resonance frequency. An impedance value of the first parallel-arm resonator is larger than an impedance value of the second parallel-arm resonator.
摘要:
Provided are, a converter section (30) which converts a commercial AC voltage (VAC) into a DC voltage (VDC); an inverter section (60) which converts the DC voltage (VDC) into an output AC voltage (VOUT) of a predetermined frequency by a pulse-width modulation system based on an assigned PWM width, and supplies the output AC voltage (VOUT) to a compressor motor (70). Further, an instantaneous DC voltage detecting section (50) detects an instantaneous DC voltage (VDCS); and an arithmetic processing section (100) corrects the PWM width so as to maintain the output AC voltage (VOUT) at a desired value following the variation in the instantaneous DC voltage (VDCS). It is possible to operate a compressor motor (70) in an optimum state of load characteristics and efficiency.
摘要:
An apparatus which secures a heat sink to an electrical component connected to a circuit board, including a first outer cover which engages a portion of the heat sink and a portion of the circuit board. In addition, the first outer cover encloses the electrical component, and the electrical component has at least two pins, a first surface facing the circuit board, and a second surface facing the heat sink. Further, a majority of heat dissipating surfaces of the heat sink are outside a space enclosed by the first outer cover and the circuit board.
摘要:
To provide a simple immunochemical assay of a PIVKA of every kind (PIVKA-VII, -IX, -X, -C, -S or -Z: protein induced by vitamin K absence) corresponding to a vitamin K-dependent protein. It has been confirmed that a PIVKA of every kind can be determined according to the double antibody sandwich method wherein use is made of a solid-supported anti-PIVKA-II monoclonal antibody. There is also disclosed a reagent for determination of a PIVKA of every kind according to the above-mentioned method.