Abstract: A heat pack using supercooled aqueous salt solution that resists premature activation at low temperatures is disclosed. The heat pack comprises two sheets that are bonded together to form a laminated sheet. The heat pack has a first and second compartment. A frangible seal separates the two compartments. One of the compartments contains a supercooled aqueous salt solution. The salt solution contains 15 to 25 percent glycerin by mass.

Abstract: A thermotherapeutic pad includes a sealed envelope having a top layer of plastic and a bottom layer of textured plastic. The top layer of plastic and the bottom layer of textured plastic can be heat-sealed together. The bottom layer of textured plastic has an outer textured surface and is more thermally insulative than the top layer of plastic. A plurality of gel beads and liquid are contained inside the sealed envelope. The bottom layer of the pad can be placed against the skin or clothing to provide thermal therapy. Baffles can be provided inside the sealed envelope to promote even distribution of gel beads.

Abstract: A thermotherapeutic pad for applying heat or cold to a body part. The pad has a material for releasing or absorbing heat and a thermally conductive envelope for containing the granular material. The pad also has a holder for removably holding a cold pack adjacent to the envelope. The thermotherapeutic pad may provide heat by heating the material and placing the envelope against the body part, and the thermotherapeutic pad may absorb heat by placing a cooled cold pack into the holder and placing the portion of the pad comprising the cold pack against the body part.

Abstract: Plastic sheet can be heat-sealed to form a water-tight envelope having an open top. A water-tight frangible container can be loaded into the envelope through the open top. The water-tight frangible container can contain a predetermined amount of water. A predetermined amount of phosphate ammonium nitrate (PAN) can be loaded into the envelope through the open top. The relative proportion of the predetermined amounts of phosphate ammonium nitrate to water can be selected to provide a target cooling effect to a portion of a body to which cooling is to be applied. The open top of the envelope can be heat-sealed to form a water-tight outer pack.

Abstract: A thermotherapeutic pad includes a sealed envelope having a top layer of plastic and a bottom layer of textured plastic. The top layer of plastic and the bottom layer of textured plastic can be heat-sealed together. The bottom layer of textured plastic has an outer textured surface and is more thermally insulative than the top layer of plastic. A plurality of gel beads and liquid are contained inside the sealed envelope. The bottom layer of the pad can be placed against the skin or clothing to provide thermal therapy. Baffles can be provided inside the sealed envelope to promote even distribution of gel beads.

Abstract: A thermotherapeutic pack and a method of manufacturing a thermotherapeutic pack are disclosed. The thermotherapeutic pack comprises a pouch formed from at least one laminate sheet. The at least one laminate sheet includes an outer polyester layer, an intermediate nylon layer and an inner polyethylene layer. The pouch is permanently sealed closed. A thermotherapeutic composition is pre-loaded into the pouch. The thermotherapeutic composition is for providing thermal therapy in the form of hot therapy and cold therapy when the pouch is applied against a body part. The thermotherapeutic pack can have at least one strap and at least one buckle that co-operate with each other to retain the pouch against a body part during thermal therapy.

Abstract: Plastic sheet can be heat-sealed to form a water-tight envelope having an open top. A water-tight frangible container can be loaded into the envelope through the open top. The water-tight frangible container can contain a predetermined amount of water. A predetermined amount of urea can be loaded into the envelope through the open top. Separate from the loading of the urea, a predetermined amount of ammonium chloride can be loaded into the envelope through the open top. The relative proportions of the predetermined amount of urea, the predetermined amount of ammonium chloride, and the predetermined amount of water can be selected to provide a target cooling effect to a portion of a body to which cooling is to be applied. The open top of the envelope can be heat-sealed to form a water-tight outer pack.

Abstract: A thermotherapeutic pad has an envelope containing a thermally active material attached to a flexible flap which can be wrapped a body part and fastened in position.

Abstract: A thermotherapeutic pad for applying heat or cold to a body part. The pad has a material for releasing or absorbing heat and a thermally conductive envelope for containing the granular material. The pad also has a holder for removably holding a cold pack adjacent to the envelope. The thermotherapeutic pad may provide heat by heating the material and placing the envelope against the body part, and the thermotherapeutic pad may absorb heat by placing a cooled cold pack into the holder and placing the portion of the pad comprising the cold pack against the body part.

Abstract: A heat pack containing a super-cooled aqueous solution is provided comprising a flexible container having at least two compartments separated by a rupturable seal housing an aqueous solution in one compartment and having the other compartment remain empty.