Abstract: An exothermic structure that is directly applied to skin comprises a pouch having an air-permeable side and an air-impermeable side, and a exothermic composition that is incorporated into the pouch in a sealed state. The air-impermeable side comprises an inner polymer sheet layer, an intermediate adhesive, and an outer release sheet, wherein the adhesive layer exists in part or entire of an outer periphery on an inner surface of the release sheet. The total area of the adhesive layer is 10 to 40% of the area of the release sheet, the adhesive layer has an adhesive portion(s) and a non-adhesive portion(s) or only an adhesive portion(s), the total area of the adhesive portion(s) is 30 to 100% of the total area of the adhesive layer, and in the outer periphery the total length of the adhesive portion(s) is 60 to 100% of the total length of the adhesive layer.

Abstract: A coated sintered body can be used for a cutting tool for precision machining of hardened steel. The coated PCBN cutting tool includes a substrate which contains not less than 35 volume % and not more than 85 volume % of CBN, and a hard coated layer formed on the substrate. The hard coated layer comprises at least one compound layer consisting of at least one element selected from the group 4a, 5a, and 6a elements of the periodic table and Al, and at least one element selected from C, N and O. The thickness of the layer is not less than 0.3 &mgr;m and not more than 10 &mgr;m. The center-line mean roughness of the hard coated layer is not more than 0.1 &mgr;m.

Abstract: In a surface-coated boron nitride sintered compact tool, at least a part of the tool edge related with cutting is based on a substrate of a high pressure phase type boron nitride, and a surface-coated layer is provided on the surface thereof. The surface-coated layer includes an intermediate layer present in a continuous manner at the interface of the high pressure phase boron nitride sintered compact substrate, and further includes a hard coated layer formed thereon. The intermediate layer consists of at least one element selected from the Groups 4a, 5a and 6a of the Periodic Table, and has a mean thickness of 0.005 to 0.05 &mgr;m. Thereby, a markedly improved adhesive strength of the hard coated layer on the substrate is achieved.

Abstract: In a surface-coated boron nitride sintered compact tool, at least a part of the tool edge related with cutting is based on a substrate of a high pressure phase type boron nitride, and a surface-coated layer is provided on the surface thereof. The surface-coated layer includes an intermediate layer present in a discontinuous manner or in the form of dispersed particles at the interface of the high pressure phase boron nitride sintered compact substrate, and further includes a hard coated layer formed thereon. The intermediate layer consists of at least one element selected from the Groups 4a, 5a and 6a of the Periodic Table, and has a thickness of at most 1 &mgr;m, or has a proportion of 1 to 20 vol % of particles with a particle diameter of 0.1 to less than 0.5 &mgr;m and at most 5 vol. % of particles with a particle diameter of at least 0.5 &mgr;m. Thereby, a markedly improved adhesive strength of the hard coated layer on the substrate is achieved.

Abstract: The object of the present invention is to provide a cutting tool consisting of a surface-coated high pressure phase type boron nitride sintered compact, having a markedly improved adhesive strength of a hard coated layer to a cBN sintered compact substrate.

Abstract: The object of the present invention is to provide a cutting tool consisting of a suface-coated high pressure phase type boron nitride sintered compact, having a markedly improved adhesive strength of a hard coated layer to a cBN sintered compact substrate.

Abstract: The present invention provides a coated sintered body which can be used in precious machining hardened steel. The coated PCBN cutting tool comprises a substrate which contains not less than 35 volume % and not more than 85 volume % of CBN, and a hard coated layer formed on the substrate. The hard coated layer comprises at least one compound layer consisting of at least one element selected from a group of 4a, 5a, 6a elements of the periodic table and Al, and at least one element selected from a group of C, N and O. The thickness of the layer is not less than 0.3 &mgr;m and not more than 10 &mgr;m. The center-line mean roughness of the hard coated layer is not more than 0.1 &mgr;m.