Heating implement

Patent metadata

Field	Value
Publication number	US-12343281-B2
Application number	US-202117996811-A
Country	US
Kind code	B2
Filing date	Feb 15, 2021
Priority date	Apr 24, 2020
Publication date	Jul 1, 2025
Grant date	Jul 1, 2025

Abstract

A warming device including a heat generating element that contains a powder of an oxidizable metal, a powder of a carbon material, water, and a powder of a porous material other than the oxidizable metal and the carbon material. The heat generating element is a sheet material, and in the heat generating element, a ratio of the mass content of the water to the mass content of the powder of the oxidizable metal multiplied by one hundred [100×(water/powder of oxidizable metal)] is from 30 to 270.

First claim

The invention claimed is:

1. A warming device comprising a heat generating element that contains a powder of an oxidizable metal, a powder of a carbon material, water, and a powder of a porous material other than the oxidizable metal and the carbon material,
wherein the heat generating element is a sheet material, and
in the heat generating element, a ratio of the mass content of the water to the mass content of the powder of the oxidizable metal multiplied by one hundred [100×(water/powder of oxidizable metal)] is from 30 to 270.

2. A warming device comprising a heat generating element that contains a powder of an oxidizable metal, a powder of a carbon material, water, and a powder of a porous material other than the oxidizable metal and the carbon material,
wherein the heat generating element is a sheet material, and
in the heat generating element, a ratio of the mass content of the powder of the porous material to the mass content of the powder of the oxidizable metal multiplied by one hundred [100×(powder of porous material/powder of oxidizable metal)] is from 1 to 25.

3. A warming device comprising a heat generating element that contains a powder of an oxidizable metal, a powder of a carbon material, water, and a powder of a porous material other than the oxidizable metal and the carbon material,
wherein the heat generating element is a sheet material, and
in the heat generating element, a ratio of the mass content of the powder of the porous material to the mass content of the water multiplied by one hundred [100×(powder of porous material/water)] is from 1 to 30.

4. The warming device according to claim 1 ,
wherein the heat generating element is accommodated in an air-permeable enclosing material, and
a layer containing a powder of a water absorbing resin is disposed between the heat generating element and the enclosing material.

5. The warming device according to claim 4 , wherein the layer is formed by sandwiching the powder of the water absorbing resin between two moisture-permeable sheets.

6. The warming device according to claim 1 ,
wherein the sheet material has a base sheet and a layer of a heat generative composition provided on one surface of the base sheet,
in the heat generating element, a ratio of the mass content of the water to the mass content of the powder of the oxidizable metal multiplied by one hundred [100×(water/powder of oxidizable metal)] is from 80 to 270, and
the layer of the heat generative composition is obtained from a paste that contains the powder of the oxidizable metal, the powder of the carbon material, the powder of the porous material, and water.

7. The warming device according to claim 1 ,
wherein the sheet material is made of a mixture of the powder of the oxidizable metal, the powder of the carbon material, the powder of the porous material, water, and a fiber material, and
in the heat generating element, a ratio of the mass content of the water to the mass content of the powder of the oxidizable metal multiplied by one hundred [100×(water/powder of oxidizable metal)] is from 30 to 80.

8. The warming device according to claim 1 ,
wherein the sheet material has a base sheet and a layer of a heat generative composition provided on one surface of the base sheet,
the layer of the heat generative composition is obtained from a paste that contains the powder of the oxidizable metal, the powder of the carbon material, the powder of the porous material, and water,
the warming device further comprises a layer containing a powder of a water absorbing resin, and
the heat generative composition is disposed between the base sheet and the layer containing the powder of the water absorbing resin.

9. The warming device according to claim 1 , wherein the porous material has a pore diameter from 0.01 to 5 μm.

10. The warming device according to claim 1 , wherein the porous material contains a silicon-containing inorganic compound.

11. The warming device according to claim 10 , wherein the porous material is composed of calcium silicate.

12. The warming device according to claim 11 , wherein the calcium silicate has a pore diameter from 0.02 to 0.8 μm.

13. The warming device according to claim 1 , comprising:
a main body that is shaped to cover a user's eyes when the warming device is in use;
wherein the heat generating element is included in the main body; and
a pair of earloop portions that are attached to the main body and can keep the user's eyes covered by the main body,
wherein the main body includes a topsheet located on a side that is close to the user's skin and a backsheet located on a side that is far from the user's skin, and
the heat generating element is held between the topsheet and the backsheet.

14. A method of generating steam and heat, comprising: applying the warming device according to claim 1 .

15. A warming device comprising a heat generating element that contains a powder of an oxidizable metal, a powder of a carbon material, water, and calcium silicate,
wherein the heat generating element is a sheet material, and
in the heat generating element, a ratio of the mass content of the water to the mass content of the powder of the oxidizable metal multiplied by one hundred [100×(water/powder of oxidizable metal)] is from 30 to 270.

Assignees

• Kao Corp

Inventors

• Shidahara Yasuhiro

Classifications

• A61F2007/0244

  with layers · CPC title

• A61F2007/0088

  Radiating heat · CPC title

• A61F2007/0004

  Eyes or part of the face surrounding the eyes · CPC title

• A61F9/04 Primary

  Eye-masks {; Devices to be worn on the face, not intended for looking through; Eye-pads for sunbathing} · CPC title

• A61F2007/0228

  with belt or strap, e.g. with buckle · CPC title