Abstract: The present invention relates to a carbon fiber prepreg. The carbon fiber prepreg of the present invention is characterized in that a carbon fiber bundle comprising a plurality of continuous carbon filaments and having a hook drop value of 10 cm or more as the degree of fiber entanglement is impregnated with a base resin mainly composed of a thermosetting resin, and that particles of 150 .mu.m or less in particle size made of a thermoplastic resin account for 20 wt % or less based on the weight of the entire prepreg and distributed at a higher concentration in the surface zone than in the inside. The carbon fiber prepreg of the present invention is good in tackiness and less changing in tackiness with the lapse of time, and can form a composite with an excellent compression interlaminar shear strength (CILS) at high temperature after moisture absorption while maintaining good impact resistance.

Abstract: A method for storing a polyester film for a magnetic recording medium, characterized in that a polyester film for a magnetic recording medium with a surface roughness Ra of 6 nm or less on the surface A on one side is stored substantially in a storing atmosphere having a storing temperature kept in a range from 10.degree. C. to 35.degree. C. The polyester film stored according to this storing method is used as a base film for producing magnetic tapes.

Abstract: Titanium killed steel sheets which are not troubled by nozzle clogging while they are produced in a continuous casting process, have few surface defects caused by cluster-type inclusions, and are highly rust resistant, and are formed from a melt of titanium killed steel that contains any one or two of Ca and metals REM in an amount of not smaller than 0.0005% by weight, and wherein the steel contains major oxide inclusions of any one or two of CaO and REM oxides in an amount of from about 5 to 50% by weight, Ti oxides in an amount of not larger than about 90% by weight, and Al.sub.2 O.sub.3 in an amount of not larger than about 70% by weight.

Abstract: The present invention provides a ferritic stainless steel plate improved in the deep drawability and the anti-ridging property at deep drawing work and the production technique thereof. The practical construction of the present invention is a ferritic stainless steel plate containing from 0.001 to 0.015 wt. % C, not more than 1.0 wt. % Si, not more than 1.0 wt. % Mn, not more than 0.05 wt. % P, not more than 0.010 wt. % S, from 8 to 30 wt. % Cr, not more than 0.08 wt. % Al, from 0.005 to 0.015 wt. % N, not more than 0.0080 wt. % O, not more than 0.25 wt. % Ti with Ti/N.gtoreq.12, and from 0.05 to 0.10 wt. % (Nb+V) with V/Nb being from 2 to 5, and, if necessary, further containing one or more kinds selected from not more than 2.0 wt. % Mo, not more than 1.0 wt. % Ni, and not more than 1.0 wt. % Cu together with one or more kinds selected from from 0.0005 to 0.0030 wt. % B, from 0.0007 to 0.0030 wt. % Ca and from 0.0005 to 0.0030 wt. % Mg.

Abstract: An earthquake resistant structure for mounting on a base having a limited available surface has an upper bearing and a lower bearing compactly arranged, one with a convex surface and the other with a concave surface, in contact with each other to transmit load between a bridge and a supporting pier, for example, the bearings being slidable relative to each other; a pin is provided for fixing the upper and lower bearings and an extraction preventing member prevents the bearings from separating from each other; a seal member is disposed between the upper bearing and the lower bearing; and a dust prevention and anti-corrosion cover are provided to assure long-time use.

Abstract: Grain-oriented electrical steel sheet having excellent magnetic characteristics in which shearing angles of grain directions [001] of secondary recrystallized grains from a rolling direction have an average value of about 4.degree. or less, wherein the area % of secondary recrystallized grains having a length of about 60 mm or more in the rolling-orthogonal direction is about 85% or more; with respect to recrystallized micro grains, the area % of crystal grains having a grain diameter of 2 to 20 mm is about 0.2% or more and about 10% or less; and the average value of angles formed with the steel sheet surface by grain directions [001] is about 1.5.degree. or more and about 5.0.degree. or less; in a grain-oriented electrical steel sheet of a high magnetic flux density (B.sub.8 .gtoreq.1.96 T) low iron loss is achieved without providing magnetic domain-refining treatment, very low iron loss value by forming grooves on the steel sheet surface, smoothening the steel sheet surface or a combination thereof.

Abstract: A transparent gas barrier biaxially oriented polypropylene film, comprising a base layer mainly composed of a polypropylene polymer, a polyolefin resin layer of 30 to 85 J/g in the heat of fusion formed at least on one side of the base layer, and an imperfectly oxidized alumina layer formed on the polyolefin resin layer, wherein the aluminum metal concentration in the internal portion of the imperfectly oxidized alumina layer is higher than that in the surface of the layer and that in the interface with the polyolefin resin layer, and the aluminum metal content of the imperfectly oxidized alumina layer is kept in a range of 10 to 200% nm. It is a transparent metallized gas barrier biaxially oriented polypropylene film excellent in moisture and oxygen barrier properties and also excellent in the gas barrier properties after elongation.

Abstract: Provided is a non-processed plate for waterless lithographic printing plates, which comprises a photosensitive layer, an ink-repellent layer and a protective layer as laminated in that order on a support and in which the photosensitive layer contains a polymerizable compound as obtained by reacting a glycidyl ether of a polyalcohol, such as hexitol or pentitol, with acrylic acid and/or methacrylic acid. The plate has good image reproducibility and good storage stability. Processing the plate gives waterless lithographic printing plates having good printing durability.

Abstract: Optically active materials of tricyclic compounds, for example, cyclopenta [b] benzofuran derivatives represented by the following formula: ##STR1## wherein R.sub.1, R.sub.2, Y and Z independently represent hydrogen, halogen, an alkyl group, or an aryl group; and n represents 0 to 4, are directly produced by adding an optically active alcohol, amine and/or metal salt thereof.

Abstract: A fiber reinforced thermoplastic resin sheet which has no warpage, higher fiber orientation or randomized fiber orientation, manufactured by supplying a dispersion containing reinforcing fibers and a thermoplastic resin from an inlet onto a moving endless mesh belt and by continuously forming a web in the shape of a sheet while subjecting the dispersion to suction and filtration, is disclosed. The method and apparatus of manufacturing the same by means of controlling the speed ratio and the distribution of the suction amount of the aqueous medium are also disclosed.

Abstract: In a grain oriented electrical steel sheet used for cores of transformers and generators, a high alignment degree of grain orientations reduces iron loss, by precipitating very fine AlN or/and BN and providing strong inhibiting effect against the growth of the primary recrystallized grains, providing radically improved texture and grain structure in the steel.

Abstract: The object of the present invention is to provide carbon fibers with high tensile strength as a resin impregnated strand even if the single filaments constituting the carbon fibers are thick. The carbon fibers of the present invention consisting of a plurality of single filaments are characterized by satisfying the following relation:.sigma..gtoreq.11.1-0.75dwhere .sigma. is the tensile strength of the carbon fibers as a resin impregnated strand (in GPa) and d is the average diameter of the single filaments (in .mu.m). The carbon fibers can be preferably used as a material for forming energy-related apparatuses such as CNG tanks, fly wheels, wind mills and turbine blades, a material for reinforcing structural members of roads, bridge piers, etc., and also a material for forming or reinforcing architectural members such as timber and curtain walls.

Abstract: The present invention provides an aromatic polyamide film wherein a heat-shrinkage in the TD direction at 220.degree. C. is of 0.2 to 8% under a load of 80 kg/cm.sup.2, and wherein an average ten-point roughness Rz of the surface that is opposite to a surface for providing a magnetic layer is 10 to 200 nm; and a magnetic recording medium, wherein a magnetic layer is provided on a surface of the film. Since the heat-shrinkage at a high temperature and the properties of the surface of the film are within the confines of the present invention, there is obtained a magnetic recording medium having a high degree of flatness with small curls, and a high recording density by using the film.

Abstract: The present invention provides a method and apparatus, in which a reinforcing fiber bundle consisting of a plurality of paralleled single fibers is or a plurality of mutually paralleled reinforcing fiber bundles respectively consisting of a plurality of paralleled single fibers are driven to run through a plurality of rolls while being bent to open the fiber, and in which the opened reinforcing fiber bundle is impregnated with resin to produce a prepreg, comprising vibrating at least one of the rolls in the axial direction of the roll, to open the reinforcing fiber bundle(s), pressing the reinforcing fiber bundle(s) to the peripheral surface of a roll located immediately downstream of the vibrating roll without vibrating the roll, and bringing the opened reinforcing fiber bundle(s) into contact with the peripheral surface of the non-vibrating roll with a contact length of not less than twice the contact length of the reinforcing fiber bundle(s) on the vibrating roll, for retaining the opened state of the rein

Abstract: High-quality high-speed steel roll which is markedly excellent in abrasion resistance and free of carbide segregation even in the case of production by centrifugal casting of economical benefit; it comprises an outer layer containing, by all weight ratios, C; 2.4-2.9%, Si; not more than 1%, Mn; not more than 1%, Cr; 12-18%, Mo; 3-9%, V; 3-8% and Nb; 0.5-4%, and meeting with the following equations (1) and (2) at one time,0.27.gtoreq.Mo (%)/Cr (%).ltoreq.0.7 (1)C (%)+0.2.multidot.Cr (%).ltoreq.6.2 (2)the outer layer further containing as the balance Fe and unavoidable impurities.

Abstract: Biaxially oriented polypropylene film excellent in heat resistance and long-term dielectric properties at high temperatures, reduced insulation defects, and excellent impregnation of insulating oil into the clearance between film layers and swelling resistance when immersed in the insulating oil; in a capacitor having excellent heat resistance, dielectric properties, corona resistance, long-term thermal durability and electric current resistance, with the polypropylene film serving as dielectric; the film is a biaxially oriented polypropylene film characterized by 98 to 99.5% isotacticity, 99% or more in isotactic pentad fraction, 30 ppm or less in ash content and 0.01 to 0.4 .mu.m in center line average surface roughnesses on both sides.

Abstract: A polyester film, comprising a non-liquid crystal polyester (A) and a copolyester (B) containing mesogen groups in the main chain to form a phase separated structure in the non-liquid crystal polyester (A), and the dispersed domains of the copolyester (B), having forms to satisfy the following formulae (1) and (2):0.02<(I/J)<50 (1)K<1/2.times.S[I, J] (2)where I, J and K are form indicators expressing the average form of the plurality of domains existing in the film: I is the average length of the dispersed domains of the copolyester (B) in the machine direction of the film; J, that in the transverse direction; and K, that in the normal direction: and S is a function for selecting the shorter value of the lengths I and J; if I>J, S[I, J] means J, and if I<J, S[I, J] means I. If the copolyester (B) has such geometrical forms, the polyester film obtained is excellent in rigidity, high toughness, heat shrinkage, clarity, surface properties, long-time thermostability, electric properties, etc.

Abstract: Method for producing highly purified silicon for use in solar cells by a single solidification purification, pouring silicon into a mold and gradually fractionally solidifying it while solidifying the liquid surface, followed by purifying the solidified silicon by zone melting or continuous casting using an electromagnetic mold, or by zone melting in combination with continuous casting, and optionally causing directional solidification to concentrate impurities, leaching and recycling.

Abstract: The method for dyeing a polyamide fabric of the present invention comprises the step of dyeing a polyamide fabric having structural variations in the longitudinal direction of the fibers, by a dye liquor containing an anionic reactive dye and regulated at pH 3.about.8. The dyed product of the present invention is a dyed polyamide fabric obtained by said dyeing method. Furthermore, the dyed product of the present invention is obtained as a grandrelle tone dyed product by dyeing a polyamide fabric having structural variations in the longitudinal direction of the fibers by a reactive dye, and being 4th or higher grade in the wash fastness specified in JIS L-0844.The present invention can provide a method for dyeing a polyamide fabric in a clear high grade grandrelle tone and to have excellent wash fastness, and also a grandrelle tone dyed product.

Abstract: An improved surgical suction/irrigation probe assembly is provided. The unique suction/irrigation probe assembly comprises a handpiece configured to accept a source of irrigation fluid and a source of vacuum or suction. Further, the handpiece provides a means for a surgeon to select either irrigation fluid or suction. Moreover, the handpiece has an outlet region capable of accepting a rotatable adaptor. The assembly further comprises a rotatable adaptor which is capable of being placed into engagement with the outlet region of the handpiece. Further, a shaft and fitting assembly is provided which is snapped into the rotatable adaptor and which shaft is utilized to supply either irrigation fluid or suction to a surgical site.