Abstract: The gas separation membrane element contains a gas separation membrane, and a sealing portion for preventing mixture of a source gas and a specific gas permeated through a gas separation membrane. The gas separation membrane has a first porous layer including a porous membrane, and a hydrophilic resin composition layer disposed on the first porous layer. The sealing portion is a region in which a cured material of a sealant penetrates in at least the first porous layer in the gas separation membrane, and a thermal expansion coefficient A of the sealing portion and a thermal expansion coefficient B of a material forming the first porous layer satisfy a relation (I): 0.35?A/B?1.0??(I).

Abstract: Provided are a spiral-wound gas separation membrane element, a manufacturing method therefor, a gas separation membrane module and a gas separation apparatus that include the element. The element includes a laminated body wound around a perforated central tube and including a separation membrane-flow channel member composite body. The composite body includes a gas separation membrane including a first porous layer and a hydrophilic resin composition layer. The gas separation membrane is folded with the first porous layer being located outside the hydrophilic resin composition layer. The composite body also includes a flow channel member that forms a gas flow channel, the flow channel member being sandwiched in the folded gas separation membrane. The flow channel member is provided with a first cover that covers one end portion of four end portions. The first cover is located closest to a turn-back part of the folded gas separation membrane.

Abstract: Provided are a spiral-wound gas separation membrane element, a manufacturing method therefor, a gas separation membrane module and a gas separation apparatus that include the element. The element includes a laminated body wound around a perforated central tube and including a separation membrane-flow channel member composite body. The composite body includes a gas separation membrane including a first porous layer and a hydrophilic resin composition layer. The gas separation membrane is folded with the first porous layer being located outside the hydrophilic resin composition layer. The composite body also includes a flow channel member that forms a gas flow channel, the flow channel member being sandwiched in the folded gas separation membrane. The flow channel member is provided with a first cover that covers one end portion of four end portions. The first cover is located closest to a turn-back part of the folded gas separation membrane.

Abstract: Provided is a biaxially-stretched film wherein the biaxial stretching is possible in a broader temperature range and which is excellent in thickness accuracy, and an ethylene polymer composition serving as a raw material of the film. The biaxially-stretched film of the present invention is obtained from an ethylene polymer composition (E) including a specific ethylene polymer component (A) containing 20 to 100 wt % of an ethylene polymer (a) being a copolymer of ethylene and a C4-10 ?-olefin and having specific melt flow rate and density, and an ethylene polymer component (B) being another copolymer of ethylene and a C4-10 ?-olefin, wherein a weight fraction [WA] of the ethylene polymer component (A) is 0.50 or more and 0.92 or less, and a weight fraction [WB] of the ethylene polymer component (B) is 0.08 or more and 0.50 or less provided that WA and WB total 1.0.

Abstract: Provided is a biaxially-stretched film wherein the biaxial stretching is possible in a broader temperature range and which is excellent in thickness accuracy, and an ethylene polymer composition serving as a raw material of the film. The biaxially-stretched film of the present invention is obtained from an ethylene polymer composition (E) including a specific ethylene polymer component (A) containing 20 to 100 wt % of an ethylene polymer (a) being a copolymer of ethylene and a C4-10 ?-olefin and having specific melt flow rate and density, and an ethylene polymer component (B) being another copolymer of ethylene and a C4-10 ?-olefin, wherein a weight fraction [WA] of the ethylene polymer component (A) is 0.50 or more and 0.92 or less, and a weight fraction [WE] of the ethylene polymer component (B) is 0.08 or more and 0.50 or less provided that WA and WB total 1.0.

Abstract: The gas separation membrane element contains a gas separation membrane, and a sealing portion for preventing mixture of a source gas and a specific gas permeated through a gas separation membrane. The gas separation membrane has a first porous layer including a porous membrane, and a hydrophilic resin composition layer disposed on the first porous layer. The sealing portion is a region in which a cured material of a sealant penetrates in at least the first porous layer in the gas separation membrane, and a thermal expansion coefficient A of the sealing portion and a thermal expansion coefficient B of a material forming the first porous layer satisfy a relation (I): 0.35?A/B?1.0 (I).

Abstract: Provided is a biaxially-stretched film wherein the biaxial stretching is possible in a broader temperature range and which is excellent in thickness accuracy, and an ethylene polymer composition serving as a raw material of the film. The biaxially-stretched film of the present invention is obtained from an ethylene polymer composition (E) including a specific ethylene polymer component (A) containing 20 to 100 wt % of an ethylene polymer (a) being a copolymer of ethylene and a C4-10 ?-olefin and having specific melt flow rate and density, and an ethylene polymer component (B) being another copolymer of ethylene and a C4-10 ?-olefin, wherein a weight fraction [WA] of the ethylene polymer component (A) is 0.50 or more and 0.92 or less, and a weight fraction [WB] of the ethylene polymer component (B) is 0.08 or more and 0.50 or less provided that WA and WB total 1.0.

Abstract: The present invention provides a film including, in at least a part thereof, a layer comprising an ethylene-based resin, which is a copolymer of ethylene and an ?-olefin of 4 to 10 carbon atoms, and satisfies the following requirements (1) to (5) at the same time or an ethylene-based resin composition containing the resin; (I) the melt flow rate at 190° C. under a load of 2.16 kg is in the range of 0.1 to 50 g/10 min, (II) the density is in the range of 875 to 970 kg/m3, (III) the ratio of a melt tension at 190° C. to a shear viscosity at 200° C. and an angular velocity of 1.0 rad/sec is in the range of 1.00×10?4 to 9.00×10?4, (IV) the sum of the number of methyl branches and the number of ethyl branches, each number being based on 1000 carbon atoms and measured by 13C-NMR, is not more than 1.8, and (V) the zero shear viscosity [?0(P)] at 200° C. and the weight-average molecular weight (Mw) as measured by a GPC-viscosity detector method (GPC-VISCO) satisfy the following relational formula (Eq-1): 0.

Abstract: A polyethylene-based stretched film with a thickness in the range of 10 to 100 ?m, the film comprising components (A) and (B) (the total amount of components (A) and (B) being 100 parts by weight), and has a density in the range of 898 to 960 Kg/m3: (A) 50 to 95 parts by weight of a polyethylene composition which comprises the following components (I) and (II) (the total amount of (I) and (II) being 100 parts by weight), and has a density in the range of 890 to 940 Kg/m3: (I) 5 to 95 parts by weight of an ethylene/alpha-olefin copolymer obtained by copolymerization of ethylene and an alpha-olefin having 4 to 12 carbon atoms with the use of a metallocene catalyst, which has a melt flow rate in the range of 0.

Abstract: An ethylene-?-olefin copolymer for a film or sheet satisfying the following requirements [1] to [5] simultaneously is excellent in transparency and moldability and is suitably used for a film or sheet excellent in mechanical strength. [1] The density (d) is in the range of 890 to 980 kg/m3. [2] The intrinsic viscosity ([?]) measured at 135° C. in decalin is in the range of 0.5 to 10 dl/g. [3] The ratio of weight average molecular weight (Mw) to number average molecular weight (Mn) (Mw/Mn) measured by GPC is in the range of 2.0 to 50. [4] In an elution temperature-elution amount curve given by cross fractionation chromatography (CFC), the difference between a temperature at which the integrated elution amount is 1% by mass and a temperature at which the integrated elution amount is 40% by mass is 12° C. or less, wherein the total elution amount is 100% by mass. [5] The amount of a component soluble in decane is 0.5% by mass or less.

Abstract: The present invention relates to a polyethylene-based stretched film having excellent Elmendorf tear strength and uniform stretchability. The invention relates to a polyethylene-based stretched film which is obtained by stretching a polyethylene-based resin, wherein (A-i) Em and Et, which represent the values of Elmendorf tear strength in the MD and TD directions, respectively, as measured in accordance with ASTM D1922, satisfy the following formulas 1, 2 and 3: 20?Em[N/m]?3000??(Formula 1) 20?Et[N/m]?3000??(Formula 2) 0.1?(Em/Et)?3??(Formula 3); (a-ii) the tensile initial modulus TM in the MD direction satisfies the following formula 4: 300?TM[MPa]?10000??(Formula 4); and (a-iii) the thickness is in the range of 5 to 150 ?m, and is excellent in the stretch uniformity.