摘要:
Disclosed is a fire-resistant lead-free shield material having high shielding ability against nuclear or electromagnetic radiation, and excellent bending workability and handling performance. The shield material comprises a composite material consisting of an organic material and a metal or metal compound having a nuclear or electromagnetic radiation-shielding ability. The composite material is formed into a given shape, such as a plate shape, and wrapped with a cloth-like sheet formed of glass fibers, metal fibers or carbon fibers. Alternatively, the shield material comprises a shielding element consisting of an elastic polymeric organic compound and a particle having a nuclear or electromagnetic radiation-shielding ability, such a heavy metal or ferrite. The shield material also includes either one of a film made of polyethylene, nylon, polyester or metal, a wire mesh formed of nylon fiber or metal fiber, and a plate- or rod-shaped member having a surface formed with a protrusion, which is compression-bonded onto or in the vicinity of a surface of the shielding element, or inside the shielding element.
摘要:
Disclosed is a fire-resistant lead-free shield material having high shielding ability against nuclear or electromagnetic radiation, and excellent bending workability and handling performance. The shield material comprises a composite material consisting of an organic material and a metal or metal compound having a nuclear or electromagnetic radiation-shielding ability. The composite material is formed into a given shape, such as a plate shape, and wrapped with a cloth-like sheet formed of glass fibers, metal fibers or carbon fibers. Alternatively, the shield material comprises a shielding element consisting of an elastic polymeric organic compound and a particle having a nuclear or electromagnetic radiation-shielding ability, such a heavy metal or ferrite. The shield material also includes either one of a film made of polyethylene, nylon, polyester or metal, a wire mesh formed of nylon fiber or metal fiber, and a plate- or rod-shaped member having a surface formed with a protrusion, which is compression-bonded onto or in the vicinity of a surface of the shielding element, or inside the shielding element.
摘要:
A composite material which comprises an elastomer or vulcanized rubber and particles of a high-density material, such as tungsten, evenly dispersed therein, wherein the contents of the elastomer or vulcanized rubber and the high-density particles are 35 to 50 vol. % and 50 to 65 vol. %, respectively, based on the whole composite material, and the high-density particles have a particle composition comprising 60 to 80 vol. % coarse particles having a particle diameter of 10 to 100 μm, 10 to 20 vol. % medium particles having a particle diameter of 3 to 6 μm, and 10 to 20 vol. % fine particles having a particle diameter of 1 to 2 μm, the spaces among the coarse particles being filled with the medium particles and fine particles. The composite material is excellent in flexibility and processability and is suitable for use as a radiation-shielding sheet material, weight member, vibration-damping material, balancing member, radiating material, and shot material.
摘要:
A composite material which comprises an elastomer or vulcanized rubber and particles of a high-density material, such as tungsten, evenly dispersed therein, wherein the contents of the elastomer or vulcanized rubber and the high-density particles are 35 to 50 vol. % and 50 to 65 vol. %, respectively, based on the whole composite material, and the high-density particles have a particle composition comprising 60 to 80 vol. % coarse particles having a particle diameter of 10 to 100 μm, 10 to 20 vol. % medium particles having a particle diameter of 3 to 6 μm, and 10 to 20 vol. % fine particles having a particle diameter of 1 to 2 μm, the spaces among the coarse particles being filled with the medium particles and fine particles. The composite material is excellent in flexibility and processability and is suitable for use as a radiation-shielding sheet material, weight member, vibration-damping material, balancing member, radiating material, and shot material.
摘要:
An object fitting/removing drive unit which is capable of enhancing accuracy of positioning and fitting of objects to be connected. To determine a position of a header connector on an imaginary plane which is orthogonal to a fitting/removing direction of a cable connector, cutouts which are fitted in flanges to position the flanges are formed in an inner frame.
摘要:
The present invention provides a recyclable cold curing aqueous coating composition, comprising (a) an oxidative-polymerizable, modified epoxy resin with an acid value of 25 to 60, comprising 20 to 70 percents by weight of an epoxy resin based on the total weight of said modified epoxy resin, of which a particle size is not more than 200 nm in an aqueous medium, (b) an anticorrosive pigment and/or an ampholytic metal oxide and (c) a drier. The recyclable cold curing aqueous coating composition of the present invention can provide a coating film having improved water resistance and corrosion resistance, and repeatedly reuse by recycling and readjusting. The present invention also provides a method for recycling the cold curing aqueous coating composition.
摘要:
A panel heater comprising, on an upper surface of a metallic sheet (2) provided with PTC ceramics (1) on the back side thereof, a highly insulating material or an open space (4) at the portion corresponding to the back side portion to which the PTC ceramics are provided, with a material (3) for conducting heat from the metallic sheet being thus provided to the rest of the surface side of said metallic sheet, and a finishing sheet (5) being established on the upper surface of the whole structure. More preferably, the metallic sheet (2) is provided with equally spaced concave grooves with PTC ceramics (1) on the back plane of said grooves and a highly insulating material or an open space (4) inside said grooves, and a finishing sheet (5) established thereon. Accordingly, a simply structured panel heater resistant to heavy loads yet free from local overheating is provided.
摘要:
The present invention provides a method of inhibiting the leakage of a drug encapsulated in liposomes, which comprises satisfying at least two requirements selected from the group consisting of the following three requirements: using at least two lipid bilayers of the liposomes, controlling the average particle size of the liposomes to 120 nm or more, and using lipid having a phase transition temperature higher than in vivo temperature as lipid constituting the liposomes. Also, the present invention provides a liposome preparation which is stable in vivo and satisfies at least two requirements selected from the group consisting of the following three requirements: the number of lipid bilayers of the liposomes is at least two, the liposomes have an average particle size of 120 nm or more, and lipid constituting the liposomes has a phase transition temperature higher than in vivo temperature.
摘要:
The present invention provides, for example, a method of inhibiting aggregation of complex particles in which a drug is adhered to lead particles, characterized by containing a lipid derivative or a fatty acid derivative of one or more substance(s) selected from sugars, peptides, nucleic acids and water-soluble polymers or a surfactant in the lead particles. Further, it provides, for example, a method of producing the complex particles in which a nucleic acid as a drug or a drug is adhered to lead particles, comprising the step of dispersing or dissolving the nucleic acid as a drug or the drug and an adhesion-competitive agent so as to be contained in a liquid in which the lead particles containing a lipid derivative or a fatty acid derivative of one or more substance(s) selected from sugars, peptides, nucleic acids and water-soluble polymers or a surfactant are dispersed, thereby allowing the nucleic acid as a drug or the drug and the adhesion-competitive agent adhered to the lead particles.
摘要:
There is provided an insertion and withdrawal connector apparatus in which a plurality of connectors can move only in a range of capable of engaging and separating with and from a plurality of mating connectors within a connector receiving body. A connector receiving body (1) has a pair of parallel frames (3), a pair of frame blocks (4) positioned at both end portions, and a plurality of partition members (5). One connector (10) and one mating connector are received in each of a plurality of space portions, that is, receiving chambers partitioned by a pair of frames, a pair of frame blocks, and a plurality of partition members. Each of the partition members has a pair of lances (5f, 5g) having a spring characteristic and each of the connectors has a pair of interlocking groove portions (10g) on both side surfaces. The lance (5f) interlocks with the interlocking groove portion on one of the side surfaces in the connector, and the lance (5g) interlocks with the interlocking groove portion on the other of the side surfaces in the connector. Each of the connectors has a convex portion (10d) at an upper end portion on one of the side surfaces and at a lower end portion on the other of the side surfaces, and each of the convex portions interlocks with each of the partition members.