Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a uniform composite film by taking advantage of a characteristic of inorganic particle, to provide a thermal spraying particle used for the method for producing a uniform composite film, to provide a composite film having high image clarity and brightness by using a phosphor as the inorganic particle and to provide a radiation image transformation panel using the composite film. SOLUTION: In the method for producing composite film, the inorganic particle and thermoplastic resin particle are thermally sprayed in a mixed state and the composite film is formed. Therein, a mixture of the inorganic particle and the thermoplastic resin particle is controlled so as to have a temperature at which the thermoplastic resin is melted or half-melted and the inorganic particle is neither half-melted nor melted. Further, the content of the inorganic particle is ≥85 mass% and ≤99 mass% and the content of the thermoplastic resin particle is ≥1.0 mass% and ≤15 mass%. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To fix an antibacterial agent on the surface of a plastic article at necessary sufficient amount and strength and surely guarantee a definite antibacterial performance of the plastic article with a definite amount of the antibacterial agent. SOLUTION: The antibacterial treatment of a plastic article by flame spray coating is a method for the antibacterial treatment of the plastic article. The antibacterial agent is fixed on the surface of the plastic article by flame spray coating. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To form a photocatalyst film on the surface of an object such as an existing structure with good on-site applicability in such a way as to satisfactorily ensure photocatalytic function and durability, to reduce scattering loss of photocatalyst powder and to increase coating weight on the surface of the object. SOLUTION: A thermal spraying material W is arc-melted by an arc spraying means 10, atomized and blown away by an atomizing gas. Carrier air containing photocatalyst powder is blown from a powder blowoff nozzle 22 attached to the arc spraying means 10. The opening 22a of the nozzle 22 is situated in a jetted flux ϕ 1 of the atomizing gas, accordingly the photocatalyst powder is thoroughly included in the flux ϕ 1 and blown on the surface of the object 1 in combination with the atomized thermal spraying material to form a film 1a. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a technique which prevents peeling of melt-sprayed coating on an inner surface of a bore of a cylinder block. SOLUTION: A melt-spraying device 10 is provided with a melt-spraying gun 14 inserted in a bore 12 from one side of an opening of the bore 12 which penetrates a cylinder block 11, and a magnetic field generator 24 which generates in the inside of the bore 12 a magnetic field which gives an attracting action to unmolten particles toward the other side of the opening of the bore 12. When metal such as iron used for a melt-spraying particle 15 reaches a high temperature enough to melt, it has a property not to be attracted to a magnetic field. When a magnetic field which is sucked toward the opening of the bore 12 is generated and melt-sprayed in the inside of the bore 12, while the molten melt-spraying particles 15 are sprayed on the inner surface of the bore 12 affected by no influence of the magnetic field, unmolten melt-spraying particles 37 will be sucked to the opening side of the bore 12 and will not reach an inner surface of the bore 12 affected by the influence of the magnetic field. For this reason, the good melt-sprayed coating 17 is formed which is made of only spray particles 15, or of spray particles with a low mixing ratio of the unmolten particles 37 on the inner surface of the bore 12. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a thermal spray method whereby a fine spray coating film with a small surface roughness can be formed. SOLUTION: Thermal spray is conducted by thermally softening or fusing a powder material, which is fed from a feeding machine through a transport tube 16, in a thermal spray gun 11 and delivering the material. The thermally softened or fused powder material in the thermal spray gun 11 is delivered by causing it to pass through the inside of a tubular air current 20 due to a compressed gas jetted from a jetting port 18. In the feeding machine, the atmospheric pressure in the feed nozzle is set to lower than that at the vicinity of the upstream side end of the feed nozzle, thus causing the powder material to be sucked into the fed nozzle. The powder material used has such particle sizes that the particle size (D90%) at which the cumulative particle volume from the small particle size side is 90% of the total particle volume is 20 μm or lower.
Abstract:
PROBLEM TO BE SOLVED: To provide a mixed powder thermal spraying method in which the durability is high, an inexpensive anode can be used, the thermal spraying powder can be easily controlled, and a thermal sprayed deposit of the excellent quality can be obtained. SOLUTION: In this mixed powder thermal spraying method for implementing the thermal spraying by bending the plasma jet, when a mixed thermal sprayed deposit consisting of two kinds of materials having different melting point is formed by the internal thermal spraying, a powder feed port is formed by the material, and the powder feed ports are controlled respectively to feed the materials outside.