Patent No. US 7,405,191 B2
Unilever has patented a process for making a cast matrix solid or semi-solid multiple use fabric care article for a tumble dryer. The process entails creating a mixture that contains approximately 25% of an anionic surfactant comprising soap, 10- 60% of free fatty acid, 1-50% of a nonionic material, and from about 0.5-10% polymeric structuring agent. The mixture is poured into a mold with a sheet or fiber form of 0.2-10% of a filler nonwoven structuring agent.