Abstract: A radio wave-absorbing laminate film in which both the top surface and the bottom surface have superior transmission attenuation properties and reflection attenuation capabilities in extremely high-frequency wave bands and higher, and which exhibits excellent radio wave absorption properties even when extremely thin; a production method for the film; and an element containing the film. A radio wave-absorbing laminate film having radio wave-absorbing layers, the radio wave-absorbing laminate film including a center layer, two substrate layers, and two radio wave-absorbing layers, the center layer containing at least one metal layer, and the two substrate layers being laminated on both surfaces of the center layer.

Abstract: The present invention provides a separation membrane for blood processing, comprising a polysulfone polymer, a hydrophilic polymer and a polymer having a hydroxy group in a side chain and having a solubility of 0.5 g or less in water (100 g) at 20° C., in which the content of the polymer falls within a specific range, and a blood processing apparatus having the membrane installed therein.

Abstract: It is intended to provide a porous hollow fiber membrane for treating blood which suffers from little mechanical damage in the course of production, transfer or handling and shows excellent fractionation properties though it is a thinned polysulfone-based hollow fiber membrane. A porous hollow fiber membrane for treating blood which comprises a polysulfone-based polymer and polyvinylpyrrolidone and has a gradient porous structure with an increase in pore size from the inside to the outside along the membrane thickness direction, characterized in that the porous structure has a membrane thickness of 25 ?m or more but less than 40 ?m, and fibrils having an average diameter of from 100 to 200 ?m are provided in such a manner that the ratio (To/Ti) of the average outside diameter (To) along the membrane thickness direction to the average inside diameter (Ti) is adjusted to not more than 2.

Abstract: An object of the present invention is to provide a separation membrane for blood treatment excellent in blood compatibility and reduced in elution of nitric acid ion from an inner surface even if radiation sterilization is applied in a dry state and to provide a blood treatment device having the membrane incorporated therein. The present invention provides a separation membrane for blood treatment containing at least a polysulfone resin and polyvinylpyrrolidone, wherein a proportion of intermediate water present in water in a functional separation surface of the separation membrane is 40% or more at the time when the content of water reaches a saturation point by impregnating a dry-state separation membrane with water, a water content of the separation membrane is 10% or less, and the separation membrane is subjected to radiation sterilization.

Abstract: An object of the present invention is to provide a separation membrane for blood processing having high blood compatibility and storage stability and membrane performance that rarely deteriorates even if irradiation sterilization treatment is applied, and provide a blood processing apparatus having the membrane installed therein. The present invention is also directed to providing a separation membrane for blood processing having satisfactory air-bleeding during priming treatment of the blood processing membrane, and providing a blood processing apparatus having the membrane installed therein. The present invention provides a separation membrane for blood processing, comprising a polysulfone polymer, a hydrophilic polymer and a polymer having a hydroxy group in a side chain and having a solubility of 0.5 g or less in water (100 g) at 20° C., in which the content of the polymer falls within a specific range, and a blood processing apparatus having the membrane installed therein.

Abstract: A polysulfone-based blood treatment membrane that exhibits excellent antioxidant properties, excellent long-term storage stability, and a practical strength, and ensures high productivity, a polysulfone-based blood treatment membrane that exhibits excellent antioxidant properties and long-term storage stability, rarely allows endotoxins to enter a treatment liquid, exhibits a practical strength, and ensures high productivity, and a method of producing the same. A polysulfone-based blood treatment membrane includes a polysulfone-based resin, a hydrophilic polymer, and a lipophilic antioxidant, the membrane containing the lipophilic antioxidant in an amount of 30 to 76 mg per gram of the membrane, and the total amount of the lipophilic antioxidant present on the surface of the membrane being 4 to 25 mg per gram of the membrane.

Abstract: It is intended to provide a porous hollow fiber membrane for treating blood which suffers from little mechanical damage in the course of production, transfer or handling and shows excellent fractionation properties though it is a thinned polysulfone-based hollow fiber membrane. A porous hollow fiber membrane for treating blood which comprises a polysulfone-based polymer and polyvinylpyrrolidone and has a gradient porous structure with an increase in pore size from the inside to the outside along the membrane thickness direction, characterized in that the porous structure has a membrane thickness of 25 ?m or more but less than 40 ?m, and fibrils having an average diameter of from 100 to 200 ?m are provided in such a manner that the ratio (To/Ti) of the average outside diameter (To) along the membrane thickness direction to the average inside diameter (Ti) is adjusted to not more than 2.

Abstract: A polysulfone-based blood treatment membrane that exhibits excellent antioxidant properties, excellent long-term storage stability, and a practical strength, and ensures high productivity, a polysulfone-based blood treatment membrane that exhibits excellent antioxidant properties and long-term storage stability, rarely allows endotoxins to enter a treatment liquid, exhibits a practical strength, and ensures high productivity, and a method of producing the same. A polysulfone-based blood treatment membrane includes a polysulfone-based resin, a hydrophilic polymer, and a lipophilic antioxidant, the membrane containing the lipophilic antioxidant in an amount of 30 to 76 mg per gram of the membrane, and the total amount of the lipophilic antioxidant present on the surface of the membrane being 4 to 25 mg per gram of the membrane.