Abstract: A silicon carbide material in the form of fibers, sheets or three-dimensionally structured articles useful as a reinforcing material and heat-insulating material, is produced by reacting an activated porous carbon material in the form of, for example, fibers, sheets or three-dimensionally structured articles, and having a specific surface area of 100 to 2500 m.sup.2 /g, with silicon monoxide gas at a temperature of 800.degree. C. to 2000.degree. C. and then heat-treating the resultant silicon carbide material in a non-oxidative gas atmosphere containing nitrogen and substantially no oxygen at a temperature of 800.degree. C. to 2000.degree. C.

Abstract: A thermosensitive recording material having a high whiteness and capable of forming clear colored images with an excellent resistance to oil and plasticizers is provided with a thermosensitive colored image-forming layer formed on a substrate sheet and comprising a substantially colorless dye precursor, a binder and a color-developing agent comprising at least one aromatic compound among the formulae (II), (III) and (IV): ##STR1## wherein X is an oxygen or sulfur atom, A represents a multivalent group, E represents a multivalent group having at least one aromatic cyclic group, and n represents an integer of 2 or more.

Abstract: A heat-sensitive recording material comprises a recording layer containing a colorless or light-colored basic dye and a developing agent on a support. The recording layer further contains a polyethylene having a melting point not lower than 60.degree. C., which is obtained as an emulsion not comprising a surfactant.The heat-sensitive recording material may be prepared by coating on a support an aqueous coating composition, which contains a colorless or light-colored basic dye and a developing agent together with a polyethylene emulsion comprising a polyethylene having a melting point not lower than 60.degree. C. but no surfactant (e.g. emulsifier), to form a recording layer.

Abstract: In an apparatus and method for controlling the position of a rotor in a truncated conical feeder for feeding a feed comprising a lignocellulose material and an alkaline cooking liquor to a pulping digester; the position of the rotor in the feeder is detected by a rotor position detector; and a signal indicating the detected position is input to a control device; the rotor is moved at a distance of 0.03 to 0.4 mm every 0.3 to 4 days by driving an electric motor and moving a shaft of the rotor in response to a signal, when the rotor is moved a predetermined distance, and the rotor-moving motor is stopped by a signal input from the control device.

Abstract: A support sheet for a photographic printing sheet having enhanced anti-fogging and anti-yellowing properties comprises a pulp paper substrate sheet, a front coating layer formed on a front surface of the substrate sheet and comprising a cured resinous material produced from electron beam-curable unsaturated organic compound by an electron beam irradiation thereto and mixed with a white pigment, and a back coating layer formed on a back surface of the substrate sheet and comprising a film-forming synthetic resinous material, in which a magnesium compound is contained, as an anti-fogging agent, in the substrate sheet and/or the front coating layer.

Abstract: The present invention provides a heat sensitive recording material comprising a substrate and a recording layer thereon incorporating a colorless or light-colored basic dye and a color acceptor, the recording material being characterized in that, the basic dye comprises at least one black-forming fluoran derivative and at least one phenothiazine derivative such as 3,7-bis(dimethylaminophenyl)-10-benzoylphenothiazine in an amount of 5 to 100 wt. % based on the fluoran derivative, and the color acceptor comprises a diphenyl sulfone derivative such as 3,3'-diallyl-4,4'-dihydroxydiphenyl sulfone.

Abstract: The present invention provides a thermofixable photosensitive recording material comprising a substrate and a recording layer formed thereon in which a pyrazolone derivative represented by the formula (1 ) shown in the specification and functions as a color former, and a hydroquinone derivative and an acidic substance which function as a color forming auxiliary agent or fixing auxiliary agent are dissolved mutually therein.Further, a binder can be added as required to the recording layer, thereby four components are dissolved mutually therein.

Abstract: A hot melt ink thermal transfer recording sheet, capable of recording clear continuous tone hot melt ink images thereon, is formed by coating a multi-layered substrate comprising a plurality of mono- or di-axially oriented thermoplastic resin film with an ink-receiving layer including a mixture of a modified polyvinyl alcohol containing silanol groups and having a polymerization degree of 1000 to 2000 with fine amorphous silica having an oil absorption of 200 to 300 ml/100 g (JIS K5101) and an average particle size of 0.5 to 4.0 .mu.m determined by the Coulter Counter method.

Abstract: Disclosed is a heat-sensitive recording paper comprising (a) a support made of glassine paper, (b) a resin layer formed on one side or both sides of the support, and (c) a heat-sensitive recording layer containing a leuco dye and a color developing material which develops a color on contact with the leuco dye,the resin layer being formed by coating one side or both sides of the support with an organic solvent coating composition prepared by dissolving a resin in an organic solvent, followed by drying, andthe heat-sensitive recording layer being formed on the resin layer or on the side of the support not having the resin layer thereon,wherein the organic solvent coating composition may further contain a pigment in an amount of about 3 to about 25% by weight based on the amount of the resin.

Abstract: A method of measuring the dielectric constant of a sheet-like material is disclosed, the method using a cavity resonator having a transverse slit formed in the intermediate region thereof between the opposite ends for disposing a sample sheet perpendicularly to the direction of the length thereof. The dielectric constant is measured as a function of the difference f.sub.1r -f.sub.r2 between the microwave resonant frequency f.sub.1r of the cavity resonator obtained when the sample is not inserted in the transverse slit and the microwave resonant frequency f.sub.r2 of the cavity resonator obtained when it is inserted in said transverse slit. The resonant frequency f.sub.2r (.beta.) is calculated in the state in which the sample sheet in said transverse slit is rotated through a given angle .beta. with respect to said longitudinal axis from the predetermined angle designated by 0.degree., from the formula approximating the resonance curve in the cavity resonator.

Abstract: A cylindrical composite paperboard cushion core for winding a sheet material therearound without forming undesirable stepwise marks thereon, comprises a cylindrical paperboard substrate and a cushion layer formed on the cylindrical paperboard substrate from an expanded paper sheet having a density of 0.1 to 0.4 g/cm.sup.3, the expanded paper sheet being formed by forming an unexpended paper sheet containing therein a plurality of expansible microcapsules each having a volatile liquid core contained in a thermoplastic resin shell and capable of starting an expansion at a temperature of 80.degree. C. to 200.degree. C., and heating the unexpanded paper sheet at the expansion-starting temperature of the microcapsules or higher, to cause the paper sheet to be expanded.

Abstract: Disclosed is an adhesive sheet comprising a base sheet, an undercoat layer formed on the base sheet, a release agent layer formed on the undercoat layer, an adhesive layer formed on the release agent layer and a face stock disposed on the adhesive layer, wherein the undercoat layer comprises (a) a copolymer obtained by emulsion-copolymerizing at least one hydroxyl group-containing (meth)acrylic ester with at least one of other monomers copolymerizable therewith and (b) a pigment.

Abstract: A hot melt ink-thermal transfer recording material having a high speed hot melt ink-receiving property and a satisfactory offset printing applicability and being capable of recording clear images with a high durability and useful as a bar code-recording medium, includes an ink-receiving layer formed on a substrate and containing a polyurethane ionomer and a rosin component.

Abstract: An electrophotographic lithograph printing plate material having excellent anti-toner fogging property and dimensional stability has an intermediate layer formed between a front surface of a substrate and a photoconductive layer and including a mixture of a polymeric binder, a specific dispersing agent comprising a member selected from a polyisoprenesulfonic acid and carboxylic acid-modified polyisoprenesulfonic acids, and pigment particles and electroconductive whiskers uniformly dispersed in the binder by the aid of the specific dispersing agent.

Abstract: A printing sheet of the type which is used in a thermal transfer system, the printing sheet comprising a support and a dye receiving layer formed thereon, the dye receiving layer including a polymer containing isocyanate group, the polymer having polysiloxane unit and urea unit. The isocyanate group-containing polymer is selected from a reaction product between a multifunctional polyisocyanate compound and amino-modified silicone, or a reaction product between a multifunctional polyisocyanate compound and alcohol-modified silicone or carboxyl-modified silicone and an amine compound or water. According to the present invention, both the writing characteristic and anti-sebaceous characteristic on an image surface are improved simultaneously while basic characteristics such as printing sheet sensitivity, image preservative stability, and so on, are satisfied.

Abstract: A part for projecting a measuring light beam onto a sample and a light receiving part are arranged on the same side of a sample surface so that the measuring light beam is concentric with the light receiving part, the measuring light beam which is converted to a linearly polarized light beam through a polarizing element is projected to the sample so that the measuring light beam outgoing from the sample to the projecting side is received and detected through the same polarizing element. A plurality of sets of polarizing elements and light receiving parts are set so that the polarizing elements have different polarization directions, to calculate retardation from transmitted light intensity levels as obtained.

Abstract: A thermosensitive recording material having an enhanced color-developing property and a high persistency of the resultant colored images formed thereon, is provided with a thermosensitive colored image-forming layer formed on a substrate sheet and comprising a substantially colorless dye precursor and a color developing agent comprising at least one aromatic compound of the formulae (I) and (II): ##STR1## wherein X and Y are an oxygen or sulfur atom, R.sup.1 is an alkyl, cycloalkyl, alkenyl or alkynyl group or a hetero atom-containing alkyl, cycloalkyl or alkenyl group having at least one hetero atom included in a backbone group thereof, R.sup.2 is an aryl or aralkyl group or a substituted aralkyl group having at least one hetero atom substituent, R.sup.3 is an unsubstituted aralkyl group or substituted aralkyl group having at least one hetero atom substituted in an aliphatic hydrocarbon group thereof, and R.sup.

Abstract: A heat-sensitive recording material is prepared by forming a heat-sensitive recording layer on a synthetic paper having a laminated structure. The synthetic paper has a front surface having a smoothness (in accordance with JIS P-8119) of not less than 2000 seconds on which the heat-sensitive recording layer is provided, and a back surface having a smoothness of not more than 1000 seconds, and has an opacity (in accordance with JIS P-8138) of not higher than 40%. The heat-sensitive recording material is superior in recording runnability and recording quality, and gives recorded materials useful as a second original for diazo print.

Abstract: A thermosensitive recording material having a high thermosensitivity and useful for recording thereon colored images having high storage persistency, comprises a thermosensitive colored image-forming layer formed on a surface of a substrate sheet and comprising a colorless dye precursor; a color-developing aromatic compound having, per molecule thereof, at least one arylsulfonylureido group of the formula (I): ##STR1## wherein R.sup.1 =aromatic group unsubstituted or substituted with at least one of lower alkyl and lower alkoxyl group and hologen atoms; a sensitizing aromatic amide compound of the formula (II): ##STR2## wherein Ar.sup.1, Ar.sup.2 =non-substituted phenyl or naphthyl group or substituted phenyl or naphthyl group with 1 to 3 substituent selected from aryl, aryloxy, aralkyl, alkyl, alkoxyl, trihalogenomethyl, nitro and alkylamino groups and halogen atoms; and a binder.

Abstract: A new variety, called `Golden Oji`, of `Dawn Redwood` is valuable for landscape ornamental. The new variety has beautiful golden leaves genetically, so exhibits very lovely figure from spring to fall. The growth rate is slightly slower than that of a normal `Dawn Redwood`. The new variety becomes better in full sunlight or partial shade. The leaf color is extremely distinctive, that is bright yellow especially under strong sunlight. The new variety can be reproduced on a commercial scale by cutting or grafting.