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US 4,921,743 AGranted
Use of sorbent sheet materials as evaporative coolants
AssigneeMinnesota Mining and Manufacturing Company
InventorsPaul E. Hansen, Thomas I. Insley, Christopher J. Libbey
Life of this patent
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Abstract
A method of evaporative cooling using sorbent sheet materials comprising a fibrous web that includes entangled fibers and a solid high sorbency liquid-sorbent polymeric material is disclosed. A sorbent sheet material useful for administering cold water therapy is also described.
Claims19
A reusable, sorbent sheet material for providing evaporative cooling, comprising
- (a) a sheet comprising a web comprising fibers having an average diameter of about 1-20 microns with a solid high-sorbency liquid-sorbent polymeric material contained within said web;
- and
- (b) a water and water-vapor permeable cover sheet on each of the two exposed surfaces of said web, said cover sheets being through-bonded together through said web in an intermittent pattern over substantially the entire area of said sorbent sheet material and functioning to substantially prevent migration of said polymer from said web of said sorbent sheet material when said sorbent sheet material is wetted with a volatile liquid for which said polymeric material exhibits high-sorbency.
Dependencies are inferred from the claim text.