Flexible composite material with phase change thermal storage
First Claim
1. A flexible composite material, comprising a flexible foam matrix material containing a thermal storage material capable of storing thermal energy as latent heat of phase change, said thermal storage material having a high energy state and a low energy state, said thermal storage material being dispersed within said flexible foam matrix material such that said flexible composite material is flexible when said thermal storage material is in said high energy state and said flexible composite material is flexible when said thermal storage material is in said low energy state.
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Abstract
A highly flexible composite material having a flexible matrix containing a phase change thermal storage material. The composite material can be made to heat or cool the body or to act as a thermal buffer to protect the wearer from changing environmental conditions. The composite may also include an external thermal insulation layer and/or an internal thermal control layer to regulate the rate of heat exchange between the composite and the skin of the wearer. Other embodiments of the PCM composite also provide 1) a path for evaporation or direct absorption of perspiration from the skin of the wearer for improved comfort and thermal control, 2) heat conductive pathways within the material for thermal equalization, 3) surface treatments for improved absorption or rejection of heat by the material, and 4) means for quickly regenerating the thermal storage capacity for reuse of the material. Applications of the composite materials are also described which take advantage of the composite'"'"'s thermal characteristics. The examples described include a diver'"'"'s wet suit, ski boot liners, thermal socks, gloves and a face mask for cold weather activities, and a metabolic heating or cooling blanket useful for treating hypothermia or fever patients in a medical setting and therapeutic heating or cooling orthopedic joint supports.
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Citations
30 Claims
- 1. A flexible composite material, comprising a flexible foam matrix material containing a thermal storage material capable of storing thermal energy as latent heat of phase change, said thermal storage material having a high energy state and a low energy state, said thermal storage material being dispersed within said flexible foam matrix material such that said flexible composite material is flexible when said thermal storage material is in said high energy state and said flexible composite material is flexible when said thermal storage material is in said low energy state.
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15. A flexible composite material, comprising:
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a first layer comprising an flexible insulating foam material, a second layer comprising a flexible foam matrix material containing a thermal storage material capable of storing thermal energy as latent heat of phase change, a third layer comprising a thermal control material means for regulating the rate of heat exchange from said thermal storage material through said thermal control material means. - View Dependent Claims (16, 17, 18, 19)
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20. A flexible composite material, comprising:
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a first layer comprising an insulating foam material, a second layer comprising a flexible foam matrix material containing thermal storage material capable of storing thermal energy as latent heat of phase change, a third layer comprising a thermal control material, wherein said insulating foam material and said thermal control material are made from the same substance as said foam matrix material and said first, second and third layers are continuous with one another.
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- 21. A garment made from a flexible composite material, comprising a flexible foam matrix material containing a thermal storage material capable of storing thermal energy as latent heat of phase change, said thermal storage material having a high energy state and a low energy state, said thermal storage material being dispersed within said flexible foam matrix material such that said flexible composite material is flexible when said thermal storage material is in at least one of said high energy state or said low energy state.
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23. A blanket made from a flexible composite material, comprising a flexible foam matrix material containing a thermal storage material capable of storing thermal energy as latent heat of phase change, said thermal storage material having a high energy state and a low energy state, said thermal storage material being dispersed within said flexible foam matrix material such that said flexible composite material is flexible when said thermal storage material is in said high energy state and said flexible composite material is flexible when said thermal storage material is in said low energy state.
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24. A laminated flexible thermal storage composite material, comprising:
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a first layer comprising a first flexible insulating polymer foam material, a second layer laminated to said first layer and comprising a flexible polymer matrix material having dispersed therein a thermal storage material having a transition temperature and capable of storing thermal energy as latent heat of phase change, and a third layer laminated to said second layer and comprising a second flexible insulating polymer foam material, wherein said laminated flexible thermal storage composite material has a sheet configuration, and wherein said laminated flexible thermal storage composite material is flexible when said thermal storage material is in a high energy state and said laminated flexible thermal storage composite material is flexible when said thermal storage material is in a low energy state. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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Specification