METHOD OF MANUFACTURING DISPOSABLE COLD PACK AND RELATED DISPOSABLE COLD PACK CONTAINING UREA AND AMMONIUM CHLORIDE

摘要

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.

主权项

1. A method of manufacturing a disposable cold pack for cold therapy, the method comprising:
heat-sealing plastic sheet to form a water-tight envelope having an open top; loading a predetermined amount of urea into the envelope through the open top; separate from the loading of the urea, loading a predetermined amount of ammonium chloride into the envelope through the open top; loading a water-tight frangible container into the envelope through the open top, the water-tight frangible container containing a predetermined amount of water, relative proportions of the predetermined amount of urea, the predetermined amount of ammonium chloride, and the predetermined amount of water selected to provide a target cooling effect to a portion of a body to which cooling is applied; and heat-sealing the open top of the envelope to form a water-tight outer pack.