Abstract: A heat generating body including a a moldable heat generating composition containing surplus water as a connecting substance interposed and heat sealed between packaging materials, which is characterized in that the packaging materials are each constituted of a substrate and a covering material; that the substrate is substantially planar and does not have an accommodating pocket; that the packaging materials each has a bending resistance of not more than 100 mm; that the packaging materials are each a non-elastic body at least at a temperature between 25° C. and 60° C., has a breaking strength of 500 g/mm2 or more at 25° C. and has a breaking elongation of 30% or more at 90° C. The heat generating body is suitable for relaxation of symptoms of menstrual pain.

Abstract: A heat generating body wherein three or more plural sectional exothermic parts are provided at intervals via a sectioned part which is a heat seal part. The sectional exothermic parts have a heat generating composition capable of causing heat generation upon contact with oxygen in air and are at least constituted of three kinds of a low temperature sectional exothermic part, a middle temperature sectional exothermic part and a high temperature sectional exothermic part. A maximum temperature of the high temperature sectional exothermic part is higher than a maximum temperature of the low temperature sectional exothermic part. A maximum temperature of the middle temperature sectional exothermic part is between a maximum temperature of the high temperature sectional exothermic part and a maximum temperature of the low temperature sectional exothermic part. The middle temperature sectional exothermic part is constituted of plural sectional exothermic parts having a different maximum temperature.

Abstract: There is provided such a heat-generating body for warming a foot in that a heat-generating composition is used that can retain the shape thereof irrespective of the pressure inside the container bag upon using by application to a foot, a footgear or a sock. The heat-generating body of the invention for warming a foot is characterized in that it contains a heat-generating formed article causing a heat-generating reaction in the presence of air and having a shape retaining degree of 70 or more charged in a container bag constituted with a base material, a covering material and the like. Further a process is provided for producing a heat-generating body for warming a foot in that the heat generation reaction of the heat-generating composition is suppressed to prevent loss due to the heat-generating reaction during production, quality deterioration of the heat-generating composition, and other problems.

Abstract: An object of the invention is to provide a wettable heat generating composition compressed body which has various shapes and various sizes, is wettable and is capable of generating heat upon contact with air. Another object of the invention is to provide a heat generating body having a structure in which the foregoing wettable heat generating composition compressed body is interposed between a substrate and a covering material and at least the periphery of the wettable heat generating composition compressed body is sealed and having an exothermic part having an air-permeable part.

Abstract: To provide a microheater which gives a desired temperature and starts an exothermic reaction upon immediate contact with air and in which plural microheaters can be chained or incorporated in a packaging material.

Abstract: There is provided an active iron powder which is suitable for a heat generating composition of a heat generating body, is excellent in rising properties and is excellent in economy by using an iron powder which is generally produced at present and modifying its function into an active iron powder suitable as a raw material of a heat generating body. The invention is concerned with an active iron powder to be contained in a heat generating composition capable of generating heat upon contact with air, characterized in that in the active iron powder, a part of the surface of the iron powder is covered by an iron oxide film; and that a thickness of the iron oxide film is from 3 nm to 100 ?m and is not more than 50% of the total thickness of the active iron powder.

Abstract: There are provided a process for producing an active heat generating mixture capable of causing an oxidation reaction immediately upon contact with air to generate heat and subsequently initiating an abrupt reaction which after arrival at a certain fixed temperature, is then changed to a mild reaction, the heating generating mixture being cheap and being able to be industrially mass-produced; a heat generating mixture; a heat generating composition; a moldable heat generating composition; and a heat generating body. The invention is characterized by bringing a reaction mixture containing, as essential components, an iron powder, a reaction accelerator and water and having a water content of from 0.5 to 20% by weight and a water mobility value showing an amount of surplus water of less than 0.01 with an oxidizing gas under circumstances at 0° C. or higher and regulating a temperature rise of the reaction mixture at 1° C. or higher within 10 minutes.

Abstract: To provide a heat generating body in which a space can be surely secured in the surroundings of a heat generating composition and heat insulation of the heat generating composition, adjustment of the quantity of air to be taken in and prevention of dispersion of water can be achieved.

Abstract: To provide a flexible heat generating body which is simple in structure, has excellent adaptability to the body of a user, is able to be fixed to any portion of the body upon sticking or winding, does not cause separation or coming off even upon stretching in response to the movement of the body, reaches a temperature region of use relatively rapidly and is able to give controlled heat energy.

Abstract: To provide a foot warming heat generating body having excellent shape holding properties and capable of continuing the heat generation over a long period of time by using a heat generating composition having excellent shape holding properties and capable of causing the heat generation without necessity of the removal of water such as water absorption and dehydration by a substrate after molding. The foot warming heat generating body is characterized in that a heat generating composition molded body made of a heat generating composition which contains, as essential components, an exothermic substance, a carbon component, a reaction accelerator and water, has a water mobility value showing a surplus water content of from 0.

Abstract: To provide a heat cloth which is thin and flexible; even when as a reaction of an air-permeable heat cloth proceeds, a heat generating composition becomes massive so that flexibility is lowered, or a part of an accommodating bag rides up by shrinkage and curling as caused by heat generation, well keeps the bonding and holding state so that it does not fall off easily; is supple like cloths; is excellent in flexing properties; easily and surely fits to flexible places such as elbows and knees; is able to take warmth; is applicable with good follow-up deformation properties to various places of a human body such as curved parts including shoulders, arms, a neck and feet; and hardly causes an uncomfortable feeling and a process for producing the same.

Abstract: To provide a stretchable heat generating body which follows and closely adheres to a joint part such as elbows and knees, a curved part or stretching part of the body such as shoulders and arms, and a bending and stretching part, is good in feeling for use because it is free from a tense feeling or an uncomfortable feeling during the use and does not cause peeling during the use and from which an excellent thermal effect or a therapeutic effect of an affected part can be obtained because of good adhesion to a human body.

Abstract: There is provided a heat generating body which by forming a temporary adhering part upon temporary adhesion between a substrate and a heat generating composition molded body and a covering material with an adhesive layer and subsequent heat sealing, realizes higher line speed, thereby largely improving the productivity, does not generate position deviation of the heat generating composition molded body in welding the substrate and the covering material, is able to be heat sealed and is free from seal failure. A heat generating body as formed by laminating a heat generating composition molded body resulting from molding of a heat generating composition containing, as essential components, an exothermic substance, a carbon component, a reaction accelerator and water and having a water mobility value of from 0.

Abstract: To provide a heat generating body which nevertheless an excellent warming effect (for example, an effect for relaxation of a pain by a thermal stimulus) can be obtained, hardly provides a user with an unwell feeling due to a high temperature, is fit to curved surface parts such as the abdominal region and the waist and is able to comfortably warm a desired site with a good feeling for use over a long period of time.

Abstract: There is provided an active iron powder which is suitable as a raw material of a heat generating body, is excellent in rising properties of a heat generating composition and is excellent in economy. The invention is concerned with an active iron powder to be contained in a heat generating composition capable of generating heat upon contact with air, characterized in that an amount of wustite to be contained in an iron powder is from 5.01 to 50% by weight in terms of an X-ray peak intensity ratio to iron.

Abstract: To provide a heat generating body which is able to relax symptoms such as stiff shoulder, low-back pain, muscular fatigue, menstrual pain, a symptom of poor circulation and in particular, can be suitably used for relaxation of a symptom of menstrual pain. A heat generating body wherein a heat generating composition molded body resulting from molding a moldable heat generating composition containing surplus water as a connecting substance is interposed between packaging materials and the periphery of the heat generating composition molded body is heat sealed, which is characterized in that the packaging materials are each constituted of a substrate and a covering material; that the substrate is substantially planar and does not have an accommodating pocket; that the packaging materials each has a bending resistance of not more than 100 mm; that the packaging materials are each a non-elastic body at least at a temperature between 25° C. and 60° C., has a breaking strength of 500 g/mm2 or more at 25° C.

Abstract: To provide a heat generating pad which is able to relax symptoms such as stiff shoulder, low-back pain, muscular fatigue, menstrual pain, a symptom of poor circulation and in particular, can be suitably used for relaxation of a symptom of menstrual pain and a method of use of the same.

Abstract: There are provided a heat generating composition and a heat generating body having excellent exothermic rising properties and having exothermic holding properties over a long period of time and a process for producing the same.

Abstract: There are provided a heat generating body having an exothermic part made of sectional exothermic parts in a stripe form, which is thin and flexible; even when as a reaction of an air-permeable exothermic heat generating body proceeds, a heat generating composition becomes massive so that flexibility is lowered, or a part of an accommodating bag rides up by shrinkage and curling as caused by heat generation, well keeps the bonding and holding state so that it does not fall off easily; is supple like cloths; is excellent in flexing properties; easily and surely fits to flexible places such as elbows and knees; is able to take warmth; is applicable with good follow-up deformation properties to various places of a human body such as curved parts including shoulders, arms, a neck and feet; and hardly causes an uncomfortable feeling and a process for producing the same.