Abstract:
A thermal barrier comprises a first barrier layer, a second barrier layer, and a base material positioned between the first barrier layer and the second barrier layer. The base material comprises a plurality of regions and a barrier zone separating the regions. The thermal barrier further comprises a non-encapsulated phase change material impregnating one or more of the regions. The barrier zone hinders migration of the phase change material in its liquid state within the base material, and the first barrier layer is bonded to the second barrier layer to enclose the base material. The thermal barrier may be used or incorporated in various products or applications where thermal management is desired. For example, the thermal barrier may be used in textiles, apparel, footwear, medical products, containers and packaging, buildings, appliances, and other products.
Abstract:
A thermal barrier (30) for controlling heat transfer across through buildings, appliances and textile products is disclosed. The thermal barrier (30) includes opposing, spaced apart sheets (33, 34) which define at least one chamber therebetween. A temperature stabilizing material (31) is disposed in the chamber. The temperature stabilizing material (31) is preferably a phase change material such as paraffinic hydrocarbon, hydrated salt, plastic crystal or glycol. In one embodiment, an interconnecting structure (35) is disposed between opposing sheets (33, 34) to create a plurality of cells (36) of the chamber into which the temperature stabilizing material (31) is uniformly disposed. A method of manufacturing the thermal barrier (30) is also disclosed.
Abstract:
A coating composition for fabrics includes wetted microspheres containing a phase change material dispersed throughout a polymer binder, a surfactant, a dispersant, an antifoam agent and a thickener. Preferred phase change materials include paraffinic hydrocarbons. The microspheres may be microencapsulated. To prepare the coating composition, microspheres containing phase change material are wetted and dispersed in a dispersion in a water solution containing a surfactant, a dispersant, an antifoam agent and a polymer mixture. The coating is then applied to a fabric. In an alternative embodiment, an extensible fabric (24) is coated with an extensible binder (12) containing microencapsulated phase change material (14) to form an extensible, coated fabric (10). The coated fabric (10) is optionally flocked with fibers (18). The coated, extensible fabrics are manufactured using transfer techniques.