Exothermic heat cells comprising powdered iron, a carbonaceous material and an agglomeration aid

摘要

The specification describes a method of manufacturing heat cells which are based on a specific iron oxidation chemistry and having specific physical dimensions and fill characteristics. This method involves mixing powdered iron, dry powdered carbonaceous material selected from the group consisting of activated carbon, non-activated carbon and mixtures thereof, and a low level of from 0.5%-90% of an agglomeration aid. The method also includes direct compaction of the powdered ingredients into granules, pellets, tablets, slugs and/or the like. These heat cells, which can be incorporated into disposable body wraps, provide a controlled and sustained temperature for consistent, convenient, and comfortable heat application for treating temporary or chronic pain. This invention also relates to said exothermic compositions incorporated into said heat cells.