Abstract:
A fiber is provided having enhanced thermal storage and release characteristics. The fiber includes a mixture of a first polymer and a thermal stabilizing material surrounded by a second polymer which forms a sheath for the fiber. The thermal stabilizing material may be at least one phase change and/or plastic crystalline material. The first polymer acts as a carrier for the thermal stabilizing material during formation of the fiber, and both the first and second polymers effectively enclose the thermal stabilizing material within the fiber thereby preventing its leakage. The fiber may be of the sheath-core or "island-in-the-sea" type, and fabrics manufactured from such fibers exhibit enhanced insulating properties at desired temperature ranges. Methods for manufacturing the fiber as well as fabrics formed from various types of fibers are also disclosed.
Abstract:
The invention relates to a multi-component fiber having enhanced reversible thermal properties. The multi-component fiber comprises body formed from a plurality of elongated members, at least one of the elongated members having a temperature regulating material dispersed therein. The temperature regulating material comprises a phase change material. The multi-component fiber may be used or incorporated in various articles and applications where a thermal regulating property is desired. For example, the multi-component fiber may be used in textiles, apparel, footwear, medical products, containers and packagings, buildings, appliances, and other products.
Abstract:
The invention relates to a multi-component fiber having enhanced reversible thermal properties. The multi-component fiber comprises body formed from a plurality of elongated members, at least one of the elongated members having a temperature regulating material dispersed therein. The temperature regulating material comprises a phase change material. The multi-component fiber may be used or incorporated in various articles and applications where a thermal regulating property is desired. For example, the multi-component fiber may be used in textiles, apparel, footwear, medical products, containers and packagings, 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:
An interactive thermal insulating system of the present invention includes at least three layers. The first layer (21) is a high density layer comprising a substrate (31) coated with a polymer binder (32) in which a plurality of microspheres (33) containing a phase change material (34) are dispersed. The second layer (22) is a low density fibrous mesh (42) in which individual fibers contain a plurality of microspheres (43) containing a phase change material (44) dispersed therein. A third layer (23) is a flexible substrate. The fibrous mesh is sandwiched between the coated layer and the third layer. The layers are bonded together by stitching at regular intervals, lamination, or other methods of connection. Most preferably, the phase change material contained in the microspheres include paraffinic hydrocarbons.
Abstract:
The technique of the present invention for minimizing the floor-to-ceiling temperature gradient of a room containing a ceiling, a floor, walls and at least one door and one window, includes the utilization of a phase change material adjacent the ceiling surface and a phase change material adjacent the floor surface. In order to effectively minimize the floor-to-ceiling temperature gradient of the room, first and second phase change materials may be either the same or different, or may be blends of phase change materials. Most preferably, the melting temperature of the first phase change material adjacent the ceiling is greater than the crystallization temperature of the second phase change material adjacent the floor. Preferably, the melting temperature of the first phase change material is 25 °C plus or minus 1 °C and the crystallization temperature of the second phase change material is 22 °C plus or minus 1 °C.
Abstract:
A composition for saturation of preformed, previously cured foam substrates having an at least partially open cell configuration, includes a polymer binder in which microspheres containing a phase change material are dispersed. Preferred phase change materials include paraffinic hydrocarbons. The microspheres may be microencapsulated. A preferred cured foam substrate is a skived polyurethane or polyether foam of from 20 to 1,000 mils in thickness, preferably 20 to 200 mils in thickness, having up to 6 ounces per square yard or more of encapsulated phase change material embedded in a polymer binder. One method of applying the binder with dispersed encapsulated phase change materials is by applying a binder/microsphere dispersion to the upper surface of a previously cured foam sheet, then drawing a vacuum from the underside of the cured foam sheet to permeate from 20 % to 100 % of the cured foam sheet with the binder/microsphere dispersion. The resulting product is then cured. An alternative method of applying the binder with embedded encapsulated phase change materials using knife over roll technique to an exposed surface of the skived foam is disclosed in which the most preferred viscosity of the uncured polymer binder is from 7,000 to 9,000 centipoise.
Abstract:
A fabric, fiber or article comprising a plurality of fiber bodies, the plurality of fiber bodies including a first fiber material and a second fiber material, wherein the first fiber material comprises a cellulosic material and a phase change material dispersed in the cellulosic material, the phase change material forming a plurality of domains dispersed in the cellulosic material, the phase change material having a latent heat of at least 5 Joules per gram and a transition temperature in the range of 0°C to 100°C, the phase change material providing thermal regulation based on at least one of absorption and release of the latent heat at the transition temperature. Wherein the second fiber material comprises a fire resistant material.
Abstract:
An article comprises a functional polymeric phase change material bound to a substrate. In some aspects, the functional polymeric phase change material is either covalently or electrovalently bonded to the substrate. The functional polymeric phase change material can comprise a reactive function. The substrate comprises at least one of cellulose, wool, fur, leather, polyester and nylon. Methods of producing the articles are also disclosed.