Abstract: Provided is a polyurethane foam having excellent heat resistance and the like. The polyurethane foam is obtained from a material that contains a polyol and a polyisocyanate, in which the polyol contains a polyester polyol, the polyisocyanate contains a diphenylmethane diisocyanate-based isocyanate, it is preferable that the polyester polyol has one or more side chains composed of an alkyl group, and the polyurethane foam may be used as a soundproof material for vehicles.

Abstract: Provided is a polyurethane foam having excellent heat resistance and the like. The polyurethane foam is obtained from a material that contains a polyol and a polyisocyanate, in which the polyol contains a polyester polyol, the polyisocyanate contains a diphenylmethane diisocyanate-based isocyanate, it is preferable that the polyester polyol has one or more side chains composed of an alkyl group, and the polyurethane foam may be used as a soundproof material for vehicles.

Abstract: Provided is a polyurethane foam having excellent heat resistance and the like. The polyurethane foam is obtained from a material that contains a polyol and a polyisocyanate, in which the polyol contains a polyester polyol, the polyisocyanate contains a diphenylmethane diisocyanate-based isocyanate, it is preferable that the polyester polyol has one or more side chains composed of an alkyl group, and the polyurethane foam may be used as a soundproof material for vehicles.

Abstract: According to one embodiment, an X-ray tube comprises a cathode for emitting electrons, an anode having an anode target with which electrons emitted from the cathode collides to radiate X-rays, a glass container housing the cathode and the anode, an anode rod extending from the anode to an outside of the container, an annular metal member through which the anode rod is inserted, the annular metal member connecting the anode and the container to maintain an inside of the container in vacuum, and an electrically insulating molding resin member charged into a space formed between the anode rod and outer surfaces of the container and the metal member.

Abstract: Provided is a polyurethane foam having excellent heat resistance and the like. The polyurethane foam is obtained from a material that contains a polyol and a polyisocyanate, in which the polyol contains a polyester polyol, the polyisocyanate contains a diphenylmethane diisocyanate-based isocyanate, it is preferable that the polyester polyol has one or more side chains composed of an alkyl group, and the polyurethane foam may be used as a soundproof material for vehicles.

Abstract: According to one embodiment, an X-ray tube comprises a cathode for emitting electrons, an anode having an anode target with which electrons emitted from the cathode collides to radiate X-rays, a glass container housing the cathode and the anode, an anode rod extending from the anode to an outside of the container, an annular metal member through which the anode rod is inserted, the annular metal member connecting the anode and the container to maintain an inside of the container in vacuum, and an electrically insulating molding resin member charged into a space formed between the anode rod and outer surfaces of the container and the metal member.