US 7,611,767 B2
Foot warming heating element and method of manufacturing foot warming heating element
Kaoru Usui, Tochigi (Japan); Michio Aida, Tochigi (Japan); Hisao Kimura, Tochigi (Japan); Masato Nakamura, Tochigi (Japan); Yoshikazu Sakamaki, Tochigi (Japan); and Toshihiro Dodo, Tochigi (Japan)
Assigned to Mycoal Co., Ltd., Tochigi-shi (Japan)
Appl. No. 10/475,513
PCT Filed Apr. 11, 2003, PCT No. PCT/JP03/04653
§ 371(c)(1), (2), (4) Date Oct. 27, 2003,
PCT Pub. No. WO03/096942, PCT Pub. Date Nov. 27, 2003.
Claims priority of application No. 2002-183685 (JP), filed on May 20, 2002.
Prior Publication US 2004/0149732 A1, Aug. 05, 2004
Int. Cl. B32B 5/22 (2006.01); B32B 37/00 (2006.01)
U.S. Cl. 428—208  [428/195.1; 428/206; 428/320.2; 428/343; 428/354; 126/263.01; 126/263.02; 156/145; 156/250] 18 Claims
OG exemplary drawing
 
1. A heat-generating body for warming a foot which comprises a container bag formed of a base material and a covering material and said container bag being charged with a formed heat-generating composition which can cause a heat generating reaction in the presence of air, the container bag being air permeable on at least at a part thereof; the formed heat-generating composition has a water mobility value of from 6 to 20, and the heat-generating composition contains, as essential components, from 1.0 to 50 parts by weight of a carbon component, from 0.1 to 10 parts by weight of a reaction accelerator and from 20 to 60 parts by weight of water, per 100 parts by weight of iron powder as a heat-generating substance generating heat upon reaction with oxygen, to which at least one kind selected from the group consisting of a water retaining agent, a water absorbing polymer, a pH adjusting agent, a hydrogen generation suppressing agent, a syneresis preventing stabilizer, a surface active agent, a defoaming agent, a hydrophobic polymer compound, a pyroelectric substance, a far infrared ray radiating substance, a negative ion generating substance, an aggregate, a fibrous material, a thickener, a binder, a fertilizer component and a heat-generating assistant is mixed depending on necessity.