Abstract:
Cellulosic fibers having enhanced reversible thermal properties and methods of forming such cellulosic fibers are described. In one embodiment, a cellulosic fiber includes a fiber body formed of an elongated member. The elongated member includes a cellulosic material and a temperature regulating material dispersed within the cellulosic material. The temperature regulating material includes a phase change material having a transition temperature in the range of -5°C to 125°C. The cellulosic fiber can be formed via a solution spinning process and can be used in various products where thermal regulating properties are desired. For example, the cellulosic fiber can be used in textiles, apparel, footwear, medical products, containers and packagings, buildings, appliances, and other products.
Abstract:
Fibra celulósica tipo lyocell que tiene unas propiedades térmicas reversibles mejoradas, y que comprende: un cuerpo de fibra (1,5, 12-14, 21-24, 26-29, 34, 59, 60, 70) formado por uno o más elementos alargados 2, 6, 15, 16, 35-58, 63, 64, 71-75), al menos un elemento alargado que incluye un material celulósico y un material regulador de la temperatura (4, 8, 61, 62, 80, 81) que incluye un material de cambio de fase en una estructura de contención, estando el material regulador de la temperatura disperso básicamente de forma uniforme por todo el material celulósico y teniendo el material de cambio de fase una temperatura de transición entre 22ºC y 40ºC.
Abstract:
A coated article for providing a phased response to rapid temperature changes, comprises a substrate and a coating disposed on a portion of the substrate. The coating comprises a polymeric material, a first temperature regulating material having a transition temperature between 22° C and 50° C and disposed within a first plurality of microcapsules, and a second temperature regulating material having a transition temperature between 25° C and 45° C and disposed within a second plurality of microcapsules. The first temperature regulating material and the second temperature regulating material are dispersed in the polymeric material. The coating includes a plurality of regions of discontinuity formed by the coating that create exposed portions of the substrate to provide improved flexibility and air permeability to the coated article and wherein the coating provides a buffered response to rapid temperature changes.
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 having reversible thermal regulation properties comprises a substrate and a functional polymeric phase change material having a heat carrying capacity. The article is further characterized by a chemical function having moisture adsorbing properties that increase the heat carrying capacity.