Abstract: An enclosure of an electronic computing apparatus allows two electronic computing modules, each having a built-in fan, to be mounted in a perpendicular direction, when the two electronic computing modules are inserted, a shutter is at an intermediate position due to an elastic force of pushing a spring cover in a front surface direction, from push rods corresponding to the two electronic computing modules, and when one of the electronic computing modules is removed, the elastic force of pushing the cover from the push rod on the removal is lost, and the shutter moves, around a rotating mechanism, to a side of a housing space on the removal side and shuts off a flow path in the housing space.

Abstract: Provided is a propylene homopolymer or a copolymer of propylene and a 30 wt % or less ?-olefin having 2 or 4 to 8 carbon atoms, having a intrinsic viscosity of more than 20 dl/g, as measured in a tetralin solvent at 135° C.

Abstract: A polypropylene composition made from or containing a first polymer consisting of component (1) made from or containing a propylene homopolymer having an MFR of 80 to 300 and containing 97.5% by weight or more of xylene insolubles (XI), wherein XI of the propylene homopolymer has a Mw/Mn of 4 to 10; and component (2) made from or containing an ethylene/propylene copolymer containing 35 to 50% by weight of an ethylene-derived unit; wherein the polypropylene composition has the following characteristics: 1) the relative proportions of component (2)/[component (1) and component (2)] is more than 30% by weight and not more than 50% by weight, 2) the intrinsic viscosity of xylene solubles (XSIV) of the first polymer is in the range of 1.5 to 4.0 dl/g, and 3) the MFR of the first polymer is in the range of 20 to 100 g/10 min.

Abstract: Provided is a propylene homopolymer or a copolymer of propylene and a 30 wt % or less ?-olefin having 2 or 4 to 8 carbon atoms, having a intrinsic viscosity of more than 20 dl/g, as measured in a tetralin solvent at 135° C.

Abstract: A polypropylene composition made from or containing a polymer made from or containing: (i) component (1) made from or containing a propylene homopolymer having MFR of 100 to 300 (at a temperature of 230° C. under a load of 2.16 k(g) and containing more than 97.5% by weight of xylene insolubles (XI), wherein XI has a Mw/Mn of 4 to 10; (ii) component (2) made from or containing an ethylene/propylene copolymer containing 15 to 50% by weight of an ethylene-derived unit; wherein 1) relative proportions of component (1) and component (2) are, respectively, not less than 50 parts by weight but less than 70 pbw and more than 30 pbw but not more than 50 pbw, 2) intrinsic viscosity of xylene solubles (XSIV) of the polymer is in the range of 1.5 to 4.0 dl/g, 3) MFR of the polymer is in the range of 20 to 100 g/10 min.

Abstract: A polypropylene-based resin composition contains: a component (A1) being a propylene homopolymer or a copolymer of propylene and a 30 wt % or less ?-olefin having 2 or 4 to 8 carbon atoms, having a intrinsic viscosity of more than 20 dl/g, as measured in a tetralin solvent at 135° C.; and a component (A2) being a polymer selected from the group consisting of (A2-1) a propylene homopolymer, (A2-2) a random copolymer of propylene and an ?-olefin having 2 or 4 to 8 carbon atoms, (A2-3) a block copolymer of propylene and an ?-olefin having 2 or 4 to 8 carbon atoms, and a combination of the (A2-1), (A2-2), and (A2-3). The resin composition has a content of the component (A1) of 0.1 to 10 wt % and a content of the component (A2) of 99.9 to 90 wt % based on the total amount of the component (A1) and the component (A2). The component (A2) has a melt flow rate (MFR) (230° C., load: 2.16 kg) of 1 to 500 g/10 min.

Abstract: A polypropylene composition made from or containing a polymer made from or containing: (i) component (1) made from or containing a propylene homopolymer having MFR of 100 to 300 (at a temperature of 230° C. under a load of 2.16 kg) and containing more than 97.5% by weight of xylene insolubles (XI), wherein XI has a Mw/Mn of 4 to 10; (ii) component (2) made from or containing an ethylene/propylene copolymer containing 15 to 50% by weight of an ethylene-derived unit; wherein 1) relative proportions of component (1) and component (2) are, respectively, not less than 50 parts by weight but less than 70 pbw and more than 30 pbw but not more than 50 pbw, 2) intrinsic viscosity of xylene solubles (XSIV) of the polymer is in the range of 1.5 to 4.0 dl/g, 3) MFR of the polymer is in the range of 20 to 100 g/10 min.

Abstract: The purpose of the present invention is to produce an alpha-olefin polymer having excellent production stability utilizing a long-lasting high catalytic activity. Provided is a method for producing an alpha-olefin polymer using a catalyst comprising: (A) a solid catalyst component comprising, as essential components, magnesium, titanium, a halogen and an electron donor compound; (B) an organoaluminum compound; and (C) an electron donor compound, the method comprising: (1) pre-polymerizing an alpha-olefin in the presence of the components (A) and (B) to produce a pre-polymerized catalyst; (2) bringing the resultant pre-polymerized catalyst into contact with a contact product that is produced by contacting the components (B) and (C) with each other in advance; and (3) adding the pre-polymerized catalyst that has been contacted with the contact product to a polymerization reaction vessel in which an alpha-olefin is introduced to polymerize the alpha-olefin.

Abstract: The purpose of the present invention is to produce an alpha-olefin polymer having excellent production stability utilizing a long-lasting high catalytic activity. Provided is a method for producing an alpha-olefin polymer using a catalyst comprising: (A) a solid catalyst component comprising, as essential components, magnesium, titanium, a halogen and an electron donor compound; (B) an organoaluminum compound; and (C) an electron donor compound, the method comprising: (1) pre-polymerizing an alpha-olefin in the presence of the components (A) and (B) to produce a pre-polymerized catalyst; (2) bringing the resultant pre-polymerized catalyst into contact with a contact product that is produced by contacting the components (B) and (C) with each other in advance; and (3) adding the pre-polymerized catalyst that has been contacted with the contact product to a polymerization reaction vessel in which an alpha-olefin is introduced to polymerize the alpha-olefin.