Showing papers by "Mitsubishi published in 1974"

Studies on polymer blend of nylon 6 and polypropylene or nylon 6 and polystyrene using the reaction of polymer

Abstract: In the presence of maleic anhydride-grafted polypropylene, marked dispersibility of the polymer blend of isotactic polypropylene and nylon 6 was obtained. This appeared to be caused by the formation of a certain graft polymer between maleic anhydride in polypropylene and terminal amino groups of nylon 6. The same phenomenon was observed when polystyrene and nylon 6 were blended with styrene–methacrylic acid copolymer as the interpolymer. The existence of such a graft polymer was confirmed by solvent extraction, estimation of the amino group of nylon 6, and identification by differential scanning calorimetry. The physical properties, especially mechanical properties of nylon 6–polypropylene polymer blends, were remarkably improved with increase of maleic anhydride added to the polymer blend. On the other hand, the physical properties those of nylon 6–polystyrene polymer blends were very little improved even in the presence of good dispersibility.

Ultrastructure ofCandida yeasts grown onn-alkanes

Abstract: Catalase activities of the cells growing onn-alkanes of various strains ofCandida yeasts wer markedly higher than those of the cells growing on glucose, ethanol or acetate. In connection with this, electron-microscopical studies revealed abundant appearance of specific microbodies having homogeneous matrix surrounded by single unit membrane in the hydrocarbon-growing cells. Localization of catalase activity in the microbodies, in addition to the mitochondria, was confirmed by cytochemical treatment of the cells with 3,3′-diaminobenzidine reagent.

Drying mechanism of coated film of polymer solution

Abstract: Drying of coated film of polyvinylalcohol (PVA) aqueous solution is studied theoretically and experimentally, focusing on the diffusion process of water and the volumetric shrinkage of film occurring by evaporation of water The diffusion coefficients were measured over the whole range of concentration by three methods, and drying experiments of coated films using hot air were performed Numerical solutions were obtained from a set of transport equations for water using the observed diffusion coefficients and were compared with the experimental results

Minor elements and evolution

Abstract: Minor elements such as molybdenum and iron are essential elements or “bioelements” for microorganisms, plants, and higher animals. However, chromium is not regarded as a bioelement in the same sense. This may be explained by their relative concentrations in the sea water. Molybdenum is the most abundant of the transition elements in sea water. Its participation in different oxido-reductases such as nitrogenase, nitrate reductase, and CO2 reductase of primitive bacteria could be related to its abundance. Good correlation can be found between the biological behaviour of different elements and their concentration in sea water. This suggests the hypothesis that the composition of the present sea water reflects that of the primeval sea water at the time of the evolution of these enzyme systems. A concentration in the sea of about 1~5 nM may be regarded as “critical”. Elements with concentrations in sea water above this critical concentration could influence early evolutionary events, and so became either essential elements or neutral elements; organisms evolved independently of trace elements with concentrations less than the critical concentration.

Inactivation of the ATP-dependent DNase of Escherichia coli After Infection with Double-Stranded DNA Phages

Abstract: The ATP-dependent DNase activity of Escherichia coli disappeared or was markedly reduced after infection with double-stranded DNA phages, T2, T3, T4, T5, T6, T7, lambda, phi80, and P1, but not with the single-stranded DNA phage f1, or the RNA phage Qbeta. This DNase activity was not reduced when chloramphenicol was added prior to phage infection.

Mar-resistant synthetic resin shaped article

Abstract: A synthetic resin shaped article having a mar-resistant polymer surface layer integrated with the polymer body is provided. The mar resistant polymer surface layer consisting essentially of, in polymerized form, (a) 20 to 100 wt.% of a compound having a total of at least three acryloxy and/or metharyloxy groups linked with a straight chain aliphatic hydrocarbon residue having not more than 20 carbon atoms (the hydrocarbon residue may contain at least one ether linkage in the main chain) and (b) 0 to 80 wt.% of at least one copolymerizable mono- or diethylenically unsaturated compound.

Molded articles of plastics having improved surface characteristics and process for producing the same

Abstract: A molded article of plastic having on its surface a cured film of a coating material comprising at least 30% by weight of at least one polyfunctional compound selected from the group consisting of poly-methacryloyloxy compounds having a molecular weight of 250 to 800 and containing at least three methacryloyloxy groups in the molecule and poly-acryloyloxy compounds having a molecular weight of 250 to 800 and containing at least three acryloyloxy groups in the molecule, and optionally 0.01 to 5% by weight of a fluorine-containing surfactant and 0.01 to 5% by weight of a carbonyl compound as photosensitizer has improved surface characteristics, particularly a high surface hardness, a high surface smoothness, high heat resistance, high abrasion resistance and a minimized optical distortion. Said molded article of plastic having improved surface characteristics can be prepared by coating the molded substrate of plastic with said coating material to a thickness of 1 to 50μ and then subjecting the coated article to a light of 2,000 to 8,000 A in an inert atmosphere to cure the coating material.

Non-newtonian fluid flow in an eccentric annulus

Abstract: Non-Newtonian fluid flow in an eccentric annulus was studied for high polymer aqueous solutions of CMC, HEC and MC. The macroscopic relations between the pressure drop and the flow rate were found to be in fairly good agreement with the results obtained by application of the conventional variational principle. Velocity profiles were measured by a hydrogen bubble method in which photographs were taken of the hydrogen bubbles. The authors observed very interesting secondary flows in the eccentric non-Newtonian fluid flow which may be due to the viscoelastic effect of the high polymer aqueous solution. The authors could not observe such secondary flows for non-Newtonian fluids in a concentric annulus or Newtonian fluids in an eccentric annulus. The authors present an equation giving the relation between the flow rate and the pressure drop for the flow of a non-Newtonian fluid in an eccentric annulus in terms of the experimental data for flow in a circular tube.

Process for producing abrasion-resistant cast article

Abstract: An improvement in a process for producing a synthetic resin cast article having an abrasion-resistant polymer surface layer integrated with the polymer body is provided. The improvement is characterized in that the abrasion-resistant polymer surface layer is formed by a two step polymerization procedure; in the first polymerization step, the polymerizable material is covered with a covering body such as a polymer film, closely adhered thereto, and in the second polymerization step, the polymerizable material is exposed to the air.

Stabilized polyphenylene ether resin composition

Abstract: Stabilized polyphenylene ether type resin composition obtained by compounding a polyphenylene ether type resin with one or more of stabilizer-component such as those respectively (a) a high molecular phosphorous ester having at least three phosphorous ester-bondings per molecule, (b) a high molecular phosphorous ester as said above and dicarboxylic acid dihydrazide substitution product, (c) a high molecular phosphorous ester as said above and steric hindered phenols and (d) a high molecular phosphorous ester as said above, steric hindered phenols and dicarboxylic acid dihydrazide substitution product; and, if desired, boron oxide.

Light transmitting filament

Abstract: There is provided a filament of improved light transmission having a sheath-core composite structure formed of a methyl methacrylate polymer core material and a fluorine-containing polymer sheath material. The light transmitting filament is characterized in that the methyl methacrylate polymer core material is prepared by the specific procedure of continuous bulk polymerization and subsequent removal of volatile contents, wherein the polymerization is performed in a continuously and thoroughly stirred reaction vessel at a low catalyst concentration and a relatively high temperature and with improved conversion. The light transmitting filament possesses an absorption coefficient (k) of no greater than 6 × 10- 3 cm- 1.

Apparatus comprising a plurality of chemically treated absorption plates for injurious gases contained in the air

Abstract: Device for removing acidic and injurious gases such as a sulphur dioxide gas and a hydrogen sulfide gas or acid mist from the air comprising a plurality of absorption plates, spacing means positioned for maintaining the absorption plates apart to form a plurality of layers so as to pass air through the space between said layers The absorption plates are hygroscopic and made of a material such as paper, asbestos paper, cloth or unwoven textile which is impregnated with an alkaline substance selected from the hydroxides and carbonates of alkali metals and alkaline earth metals such as potassium, sodium and calcium, and a hygroscopic wetting agent such as glycerine, ethylene glycol and propylene glycol so that the acidic and injurious gases or the acidic mist are neutralized by said alkaline substance The device also comprises a plurality of such absorption plates and interposition plates The interposition plates are interposed in the space between said absorption plates so as to guide two directional flows of air alternately into said space As a further embodiment, the device comprises a plurality of said absorption plates and a heat-exchange element placed on the air-inlet side of said absorption plates The heat-exchange element comprises a plurality of partition plates, and spacing means positioned for maintaining the partition plates apart, to form a plurality of layers so as to guide two directional flows of air alternately into the space between said layers The interposition plates and the partition plates are made of the same material as used in the absorption plates

Heat resistant and wear resistant alloy

Abstract: A heat resistant and wear resistant alloy of the carbide-dispersion and precipitation-hardening type, to be used for cutting tools, etc., has a basic composition consisting, in weight percent based on the total weight of said alloy, of from 10 to 90% dispersed particles composed of one or more kinds of carbides or composite carbides of transition metals from Groups 4a, 5a and 6a and the balance being from 50 to 70% Ni, from 2 to 10% Ti, from 0.5 to 10% Al, and one or more kinds of alloy elements selected from the group consisting of from 1 to 10% Fe, from 1 to 20% Co, and from 1 to 20% Cr, said alloy further containing one or more kinds of alloy elements selected from the group consisting, in weight percent based on the weight of a Ni-base matrix, of no more than 5% Nb, no more than 10% Ta, no more than 20% Mo, no more than 20% W and no more than 5% V.

Process for producing a synthetic resin article having improved resistance to surface abrasion

Abstract: A process for producing a synthetic resin article having an excellent resistance to surface abrasion is described which is characterized by having a synthetic resin surface layer, firmly adhered to the base resin, the synthetic resin surface layer comprising a polymer or copolymer containing at least 40% by weight in polymerized form of at least one compound having a total of at least three acryloxy (CH2 ═CH.CO.0-) and/or methacryloxy (CH2 ═CH(CH3)CO.O-) groups in the molecule. The article is prepared by (1) forming the above synthetic resin layer on the inner surface of a mold and then, charging a monomer for base resin into the mold and polymerizing the monomer, or (2) directly forming the synthetic resin surface layer on the surface of a synthetic resin shaped article.

Light transmitting fibers

Abstract: Light transmitting fibers having core-sheath structure which comprises a polymer mainly composed of methyl methacrylate containing at least 60 mol % of methyl methacrylate as a core component and a vinylidene fluoride-tetrafluoroethylene copolymer containing 60 to 80 mol % of vinylidene fluoride as a sheath component have a high light transmissibility and high bending strength and abrasion resistance.

System for cutting pieces from a traveling strip of sheet material

Abstract: Continuously cast plastic strip has interspaced marks or defects with lengths of unmarked usable strip therebetween. To obtain a maximum possible yield of sheets from such strip, the lengths of the portions between the marks or defects are measured and cut into sheets of two or more different lengths, the cutting being such as to produce the maximum yield of sheets of either or all lengths, singly or in combination, which can be obtained from the length cut. This procedure reduces the loss or waste due to the marks or defects, to a minimum. A special system is provided for this practice and for cutting out the marks or defects between the unmarked strip portions free from defects, with a minimum of loss or waste. Other features are involved.

Flame-resistant resin composition

Abstract: This invention relates to a flame-resistant resin composition improved in arc resistance, comprising polytetramethylene terephthalate, a flame-retardant halogen compound, and sodium antimonate or a sodium antimonate-antimony trioxide mixture containing 40% by weight or more of sodium antimonate, and optionally talc, the amount of the halogen compound being 3 to 50 parts by weight per 100 parts by weight of polytetramethylene terephthalate, the weight ratio of the halogen compound to the total antimony compound being 025 to 6, and the amount of talc being 0 to 60% by weight based on the weight of the composition This composition may also contain a reinforcing filler

Method for manufacturing metal foil- or plastic film-overlaid laminate

Abstract: A method for manufacturing a metal foil- or plastic film-overlaid laminate which comprises completely covering a cleaned press plate with a cleaned metal foil, a cleaned plastic film or both of them in such a manner that the pressing surface of the press plate comes in intimate contact with the face side of said metal foil or plastic film, partially or completely sealing the resulting covering along at least two edges of the press plate, two of the edges being opposite to each other, applying the covered press plate to one or both sides of a laminating base, subjecting the resulting assembly to a laminating apparatus with heating under pressure, taking the assembly out of the laminating apparatus, and thereafter opening the covering to remove the press plate.

Electrolytic drainage treating apparatus

Abstract: An electrolytic drainage treating apparatus is provided to treat a drainage containing a suspension of contaminated compound whereby the suspension is flocculated and removed by aluminum ions or iron ions eluted by electrolysis. The electrolytic drainage treating apparatus is equipped with a high speed electrolyzer comprising an anode and a cathode having a thin gap therebetween through which a drainage is forcibly passed as an electrolytic solution. The anode material such as aluminum and iron is eluted as ions by the electrolysis caused by passing electric current across the gap. The width of the gap between the anode and the cathode is controlled. The high speed electrolyzer is effectively used for various electrolytic treatments.

Heat transferring apparatus

Abstract: A heat transferring or transmitting apparatus characterized by an evaporator containing a semiconductive or heat generating device and being disposed below a condensor unit and connected thereto by two conduits substantially vertically arranged therebetween, such that a coolant gas is passed upwardly through one of the conduits and a coolant liquid is passed downwardly through the other of the conduits, features a resistant element, which may be in the form of a liquid reservoir, disposed in the coolant liquid passage so as to prevent flowing of the coolant gas into and through the coolant liquid passage. The paths of the flowing coolant gas and liquid are thereby kept separate whereby frictional contact therebetween is avoided while circulation is maintained through a phase transition process.

Sequence block display system

Abstract: In a programmable logic controller in which the control sequence for a controlled-objective such as a machine tool is stored in a memory unit, and the controlled-objective is automatically operated in a predetermined sequence according to the control sequence stored in the memory unit; a display system is provided in which a sequence block obtained from the control sequence stored in the memory unit is displayed in the form of a sequence diagram, particularly, a sequence diagram which includes symbols of control elements such as relays. A necessary sequence block is automatically obtained from the control sequence and is displayed. This display system is capable of displaying the states of the control elements, such as the on-off states of relay contacts.

Thermoplastic blended composition comprising polyphenylene ether, aromatic polycarbonate and styrene resin

Abstract: A thermoplastic blended composition comprising 15-80% by weight of polyphenylene ether, 5-60% by weight of a styrene resin and 2-15% by weight of an aromatic polycarbonate. The composition has superior heat resistance, fatigue resistance and processability.

Linear acceleration apparatus with cooling system

Abstract: A stator winding on an acceleration tube is immersed in a vaporizable cooling liquid and cooled through the generation of a vapor from the cooling medium due to heating of the winding. The vapor enters a condenser chamber disposed above the winding to be condensed. The condensate falls on the cooling liquid. To bring the cooling liquid into direct contact with a magnet wire for the winding and to permit the vapor to flow past the wire, the winding can be provided with radial and/or axial passageways for the cooling liquid. Further a cooling coil and partitions can be disposed above the winding in a container to provide a serpentine passageway for the vapor.

Method of decomposing halohydrocarbons

Abstract: Exhaust gas containing a halohydrocarbon having 1 - 10 carbon atoms and molecular oxygen is contacted with chromium oxide or a boehmite supported platinum at an elevated temperature to decompose the halohydrocarbon to carbon dioxide, water, hydrogen halide and free halogen.

Process for producing a sintered article of a titanium alloy

Abstract: A sintered article of a titanium alloy is produced by powder metallurgy techniques, the alloy having uniform structure, and improved mechanical properties, machinability and weldability. The process comprises; partially sintering a powder mixture of (a) at least one selected from the group consisting of powdered titanium and titanium hydride having a particle size of minus 60 mesh and (b) at least one powdered additive selected from the group consisting of powdered Ni, Al, Cu, Sn, Pd, Co, Fe, Cr, Mn, and Si having a particle size of minus 60 mesh, to partially alloy the titanium with one or more additives employed; after furnace cooling the partially sintered mass to room temperature, pulverizing it to powder of minus 60 mesh in particle size to prepare mother alloy powder; mixing (a) the mother alloy powder having a particle size of minus 60 mesh, (b) at least one selected from the group consisting of powdered titanium and titanium hydride having a particle size of minus 60 mesh, and (c), if necessary, at least one additional element selected from the group consisting of powdered V, Mo, Zr and Al-V alloy, which are added for the purpose of avoiding excess formation of a liquid phase during the subsequent sintering; compacting the thus formed powder mixture into a compact having a predetermined shape; and sintering the compact at a temperature ranging from 1000°C to 1500°C in a non-oxidizing and non-nitriding atmosphere for from 30 minutes to 2 hours.

Glass fiber-reinforced polyamide resin molding material

Abstract: A glass fiber-reinforced polyamide resin molding material, comprising a polyamide resin obtained by the condensation reaction of xylylene diamine with at least one member selected from straight-chain aliphatic α,ω-dicarboxylic acids having 6 to 12 carbon atoms and incorporated therein, glass fiber in an amount of 5 to 50% by weight based on the total weight of the polyamide resin and the glass fiber, and a shaped article obtained by molding aforesaid molding material.

Process of producing semiconductor devices

Abstract: Boron is diffused into selected areas of each main face of an N silicon substrate and gallium is diffused into the entire main face to form a P-N junction including deeper portions alternating shallower portion. Selective etching is effected to form grooves in the shallower junction portions for dividing the P-N junction. Both main faces of the substrate except for the grooves are metallized and a passivation layer is applied to each groove. Alternatively, in order to form the P-N junction as above described, gallium is selectively diffused in the substrate followed by a further diffusion of the gallium.