Abstract: Laminated ceramic devices useful as an actuator or other device responsive to electrostrictive effects or photoelectric effects are manufactured by a method which includes the steps of forming an internal electrode on each of a plurality of unbaked ceramic sheets. Each of the internal electrodes is provided with a notched area for defining a so-called future space. A plurality of the unbaked ceramic sheets is assembled to form a laminate whereby the notched areas defining the future spaces are alternately located on two different sides of the laminate with the alternate notched areas being vertically aligned. The assembled plurality of ceramic sheets is then fired and the internal electrodes baked to thereby definitively form spaces defined by the notched areas which define the so-called future or void spaces. The resulting formed spaces are thereby alternatively located on different sides of the laminate.

Abstract: In accordance with the present invention, there is provided a process for preparing thermoplastic elastomer laminates which comprises placing a thermoplastic elastomer foamable sheet in an unexpanded state containing a polyolefin resin, an ethylene/.alpha.-olefin copolymer rubber and a foaming agent onto the back of a thermoplastic elastomer sheet containing a polyolefin resin and an ethylene/.alpha.-olefin copolymer rubber, heat fusion bonding both sheets to each other, and heating the resulting laminated sheet to expand the thermoplastic elastomer sheet containing the foaming agent.

Abstract: A bag for packaging heavy materials, exhibiting excellent strength, content packaging performance, stacking performance on the pallets, and anti-collapsing performance. The bag is made of a multi-layer laminated film which comprises an outermost layer of a polyethylene film containing an inorganic filler in an amount of from 20 to 80% by weight and an innermost layer of a polyethylene film containing an inorganic filler in an amount of from 10 to 40% by weight, the outermost layer having on the surface thereof a coefficient of static friction of not smaller than 0.5 (ASTM D 1894), a coefficient of dynamic friction of not larger than 0.5 (ASTM D 1894) and a gloss of not larger than 50% (JIS Z 8741, at a measuring angle of 60.degree.), and the content of the inorganic filler in the innermost layer being from 1/2 to 1/6 of the content of the inorganic filler in the outermost layer.

Abstract: Disclosed is an ethylene-.alpha.-olefin-nonconjugated polyene random copolymer which is a random copolymer of (a) ethylene, (b) an .alpha.-olefin of 3 or more carbon atoms and (c) a nonconjugated polyene, and has such properties that (i) the copolymer contains (a) units derived from ethylene and (b) units derived from the .alpha.-olefin of 3 or more carbon atoms in a molar ratio of 40/60 to 95/5 ((a)/(b)), (ii) the iodine value is in the range of 1 to 50, (iii) the intrinsic viscosity (.eta.), as measured in decahydronaphthalene at 135.degree. C., is in the range of 0.1 to 8.0 dl/g, and (iv) the ratio g.eta.* of the intrinsic viscosity (.eta.) of the copolymer defined above to the intrinsic viscosity (.eta.).sub.blank of a linear ethylene-propylene copolymer having the same weight-average molecular weight as the ethylene-.alpha.-olefin-nonconjugated polyene random copolymer and having an ethylene content of 70% by mol, (.eta.)/(.eta.).sub.blank, is in the range of 0.2 to 0.

Abstract: The present invention provides an optical mirror and an optical device in which the mirror is capable of reflecting a light beam having a plurality of wavelengths with the phase matching condition required for nonlinear optical materials being satisfied, so that a decrease in efficiency due to the phase difference does not generate even if harmonic generation, optical mixing or the like is performed, thereby improving conversion efficiency. The optical mirror includes a plurality of reflection films, e.g., multilayer films 2 and 3, formed on one surface of a transparent substrate, each of which films corresponds to each wavelength of a light beam having a plurality of wavelengths to reflect selectively one of said plurality of wavelengths, wherein a phase difference adjusting layer 4 is formed between the two reflection films 2 and 3, reflecting light beams having different wavelengths.

Abstract: In accordance with the present invention, there is provided a method for the preparation of an ethylene polymer composition having a density of 0.86-0.94 g/cm.sup.3 and an intrinsic viscosity [.eta.] of 1-6 dl/g using an olefin polymerization catalyst composed of a transition metal compound containing a ligand having a cycloalkadienyl skeleton and an organoaluminium oxy-compound, and there is also provided a method for the preparation of an ethylene polymer composition having density of 0.87-0.93 g/cm3 and an intrinsic viscosity [.eta.] of 0.5-6 dl/g.

Abstract: Disclosed is a drying hopper comprising, disposed in its lower position, a cone portion having diameters gradually decreasing toward a lower end thereof, in which a high temperature gas is injected toward powder descending in the cone portion to thereby dry the powder, wherein said drying hopper comprises a cone portion 11 having a slant, circular wall, said cone portion 11 having a plurality of vertically spaced rows of nozzles 20, formed through the circular wall, disposed at predetermined intervals in a circumferential direction of the circular wall; a plurality of vertically spaced ring-like shells 21 fluidtightly attached to an external surface of the circular wall of the cone portion 11 with interstices therebetween in positions such that said plurality of rows of nozzles 20 are respectively, at gas inlets thereof, covered by said plurality of ring-like shells 21; and a plurality of gas feed pipes 22 respectively connected to said plurality of ring-like shells 21 in communicating relationship.

Abstract: An opening end face of a frame is closed by a transparent thin film, a vent is formed in the frame, and a filter having a filtration area larger than the sectional area of the vent is mounted to the frame to cover the vent. The filtration area of the filter is an effective area that allows the passage of gas in the filter. Then, the filter is mounted to the frame so that there is a certain space between the frame and the filter. In the conventional device, since the filter is directly mounted to the frame without space between the filter and the frame, the filtration area of the filter is substantially the same as the sectional area of the vent. In case of mounting the filter apart from the frame, however, the filtration area of the filter can be lager than the sectional area of the vent so that the quantity of gas flow is greater than that of the conventional one. Therefore, its adaptability to the changes in atmospheric pressure and in temperature is also improved.

Abstract: A process for the preparation of polyolefin which comprises polymerizing or copolymerizing olefin in the presence of a catalyst for olefin polymerization comprising (A) a metallocene compound of a transition metal selected from the Group IVB of the periodic table, and (B) an organoaluminum oxy-compound; wherein the organoaluminum oxy-compound (B) is added to the polymerization system in the form of a slurry in an aliphatic hydrocarbon or alicyclic hydrocarbon, and the polymerization is carried out in the presence of the aliphatic hydrocarbon diluent or an alicyclic hydrocarbon diluent having a boiling point below 100.degree. C.

Abstract: Disclosed are a polypropylene resin composition comprising a crystalline polypropylene having a high stereoregularity and a terpene resin and a petroleum resin each having no polar group; a polypropylene stretched film formed from the polypropylene resin composition; and a polypropylene multi-layer stretched film having a base layer formed from the polypropylene resin composition and a surface layer formed from a polypropylene type polymer. The polypropylene stretched film and a polypropylene multi-layer stretched film have excellent water-vapor barrier properties and transparency, and a high Young's modulus.

Abstract: It is contemplated by the present invention to produce a high quality aromatic carboxylic acid by a liquid phase oxidation of an alkylbenzene by contacting it with a molecular oxygen-containing gas in a solvent containing a lower aliphatic carboxylic acid, under exclusion of any acceleration of decomposition of the solvent molecules and danger of explosion accident.

Abstract: Olefin thermoplastic elastomers which comprise a partially crosslinked thermoplastic elastomer comprising a crystalline polyolefin resin (A), a block copolymer (B) which is composed of a polymer block of styrene or its derivative and a specific isoprene polymer block, and an olefin rubber (C), and thermoplastic elastomer laminates, having a substrate formed from a specific olefin thermoplastic elastomer or a crystalline polyolefin resin and a skin layer formed from the above-mentioned olefin thermoplastic elastomer, which are excellent in mechanical strength, heat resistance, heat aging resistance, weathering resistance and scratch resistance have been provided by the present invention.

Abstract: An ethylene copolymer composition comprising an ethylene/.alpha.-olefin copolymer [A-I] which has a density, a melt flow rate (MFR), an amount of a n-decane-soluble portion in the specific ranges and whose melt tension (MT) at 190.degree. C. and MFR satisfy the relation MT>2.2.times.MFR.sup.-0.84 and one (co)polymer selected from the group consisting of [B-1] a low-density polyethylene obtained by high-pressure radical polymerization, [B-2] a crystalline polyolefin and [B-3] an olefin type elastomer. Also disclosed is an ethylene copolymer composition comprising an ethylene/.alpha.-olefin copolymer composition and the low-density polyethylene [B-1] obtained by high-pressure radical polymerization, said ethylene/.alpha.-olefin copolymer composition comprising ethylene/.alpha.-olefin copolymers [A-2] and [A-3] both having physical properties similar to those of the above ethylene/.alpha.-olefin copolymer [A-1] and having intrinsic viscosities different from each other.

Abstract: The polypropylene composition of the present invention comprises polypropylene and a rubber component, and has the following characteristics that(i) the melt flow rate (MFR: 230.degree. C., 2.16 kg load), as measured in accordance with ASTM D1238, is not less than 8 g/10 min,(ii) the flexural modulus (FM), as measured in accordance with ASTM D790, is not less than 20,000 kg/cm.sup.2,(iii) the Izod impact strength (IZ), as measured in accordance with ASTM D256, is not less than 20 kg.cm/cm,(iv) the heat deflection temperature (HDT), as measured in accordance with ASTM D648, is not lower than 135.degree. C.

Abstract: The liquid crystal light modulation device of the present invention comprising a liquid crystal element consisting of one of plural liquid crystal cells and a voltage signal input means electrically connected with the liquid crystal element, wherein each liquid crystal cell contains a chiral smectic liquid crystal material layer and when a voltage signal is input to the liquid crystal element, the polarization direction of a light transmitted by the liquid crystal element is changed by approx. 90.degree. as compared with the state where the voltage signal is not input to the liquid crystal element enables a change of a light path and an open-close (on-off) operation of a light path at a high speed (optical switching time: not longer than 1 msec).

Abstract: The cycloolefin resin compositions of the present invention comprise:[A] cycloolefin resin selected from (a-1) a cycloolefin random copolymer having recurring units derived from a cycloolefin of a specific structure, (a-2) a ring opening (co)polymer of the cycloolefin, (a-3) a hydrogenation product of the ring opening (co)polymer and (a-4) a graft-modified product of the random copolymer (a-1), the ring opening (co)polymer (a-2) and the hydrogenation product thereof (a-3);[B] at least one of (b-1) an unmodified elastomer, (b-2) a modified elastomer, (b-3) an unmodified crystalline polyolefin and (b-4) a modified crystalline polyolefin; and[C] a polyamide resin. Molded products formed from these cycloolefin resin compositions are excellent particularly in resistance to greases.

Abstract: As improved process for producing an olefin polymer or copolymer by using a novel catalyst composition composed of (A) a titanium catalyst component containing magnesium, titanium, halogen and an ester specified in claim 1, as an electron donor, (B) an organoaluminum compound and (C) a heterocyclic compound or a ketone specified in claim 1, as a third component. The combination parameter of the ester in (A) and the (C) component is new, and the process can give a highly stereospecific olefin polymer or copolymer in high yields.

Abstract: A non-aqueous electrolytic solutions which has self-distinguishing property, low reactivity to metal lithium and high withstand voltage is provided. The non-aqueous electrolytic solutions of the first invention comprise, as electrolyte, lithium salt preferably LiPF.sub.6 and, as solvent, phosphoric acid esters of the following general formula [1]; ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3, which may be the same or different, represent an alkyl group or an alkyl group substituted by one or more halogen atoms and at least one of R.sup.1, R.sup.2, and R.sup.3 represents an alkyl group substituted by one or more halogen atoms. The non-aqueous electrolytic solutions of the second invention comprise, as solvents for electrolyte, trimethyl phosphate, one or more linear carbonates represented by the following general formula [3]; ##STR2## (wherein R.sup.6 represents methyl or ethyl group and R.sup.

Abstract: In a process for thermally cracking a low-quality feed stock containing a considerable proportion of heavy fractions such as high-boiling fractions, and evaporation residual oil, and a system used therefor, in which the low-quality feed stock is withdrawn from the preheater of the thermal cracking furnace to separate and remove a required proportion of said heavy fractions and thereafter returned to subject the feed stock to further preheating and thermal cracking. The low-quality feed stock thermally cracked has a predetermined proportion of the heavy fractions removed, and coking in the thermal cracking system at various lines is avoided from occurring.

Abstract: Disclosed are a polypropylene resin composition comprising a crystalline polypropylene having a high stereoregularity and a terpene resin and a petroleum resin each having no polar group; a polypropylene stretched film formed from the polypropylene resin composition; and a polypropylene multi-layer stretched film having a base layer formed from the polypropylene resin composition and surface layer formed from a polypropylene type polymer. The polypropylene stretched film and a polypropylene multi-layer stretched film have excellent water-vapor barrier properties and transparency, and a high Young's modulus.