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Heat exchange medium and articles for use thereof
| Details |
Inventors: Hughes, Thomas E.;
Assignee: Thermionics Corporation (Springfield, IL)
Primary Examiner: Skane; Christine
Assistant Examiner:
Attorney, Agent or Firm: Dority & Manning
A novel heat exchange medium made from a clay and oil mixture for use in absorbing, retaining, and dispensing heat is provided. The composition and variations thereof are most effective when heat treated so as to reduce the expansion of gases when the composition is encapsulated in sealed packaging. Particularly, the composition may employ microwave heatable and/or microwave invisible clays in combination with microwave invisible oils, such as mineral oils or microwave heatable oils, such as vegetable oils. Various constituents may be added to the medium, such as fibers made of polymeric substances and/or cloth, moisture absorbents such as polyacrylamide, and plastics such as polypropylene and the like. Various applications of the heat exchange medium are provided and are specifically directed to industrial heat exchange applications and domestic items such as hair rollers, heating pads, heating packs, including a booster-type pack with varying levels of thermal capabilities, and heat exchange medium-coated fibers. |
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DETAILED DESCRIPTION It is an object of the present invention to provide a heat exchange medium comprising clay and oil which is non-toxic and environmentally safe but maintains and transfers heat and cold over a wide range of temperatures.
It is another object of the present invention to provide a heat exchange medium that has been heat treated to remove gases and moisture therefrom and to result in a flexible, moldable substance that remains cooler and maintains heat for a longer period of time than a non-heat treated composition.
It is further another object of the present invention to provide various articles made from a heat treated heat exchange medium comprising clay and oil.
It is another object of the present invention to provide cloth and polymeric fibers coated with a heat exchange medium comprising clay and oil.
It is another object of the present invention to provide a heat exchange medium having a moisture absorbent therein to decrease the amount of gas expansion when heated, the extent of water freezing when cooled, and the extent of separation of the composition when encapsulated.
It is another object of the present invention to provide articles having alternating layers of microwave heatable and microwave transparent heat exchange mediums made from clay and oil.
Another object of the present invention is to provide various articles, including building materials, solar energy collectors, root zone insulators, food warmers and coolers, electrical insulators, and other commercial products employing a heat exchange medium comprising clay and oil that may be heat treated.
It is another object of the present invention to provide a sealing agent comprising clay and oil.
It is further another object of the present invention to provide a removable and replaceable booster-type pack comprising clay and oil which may be placed in conductive relationship with a heat exchange medium comprising clay and oil that has different properties.
Generally speaking, the present invention is directed to a composition comprising clay and oil used to produce various articles for absorbing, retaining, and dispensing heat
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