Method of forming a united exothermic medium and a heating element
US6915798B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 21, 2003 |
| Grant date | Jul 12, 2005 |
| Priority date | — |
| Expiry date | Jul 21, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2007/038
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The flexible exothermic medium of this invention is composed of an exothermic agent which generates heat in contact with air, and a water-absorptive polymer and/or a second polymer other than the water absorptive polymer. The mixture thereof is pressed at a pressure of 100-8000 kg/cm2 with alcohol, a cross-linking agent or a plasticizer. This results in producing flexible united mediums. The flexibility of the exothermic medium is also obtained by irradiating it with light or heating the mixture.The exothermic medium thus prepared is so flexible as to fit any curved part the body and has excellent exothermic characteristics compared with the prior art.The heating element using these exothermic mediums is fit for various uses such as thermotherapy, body warmers, cosmetics and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.