초록 ▼

This invention employs discrete, free-flowing particles as substrates for the absorption of water as a phase changing, thermal payload. The aqueous payloads are retained in the particles as they cycle between freezing and thawing, delivering and absorbing sensible and latent heat. Extraparticualate

This invention employs discrete, free-flowing particles as substrates for the absorption of water as a phase changing, thermal payload. The aqueous payloads are retained in the particles as they cycle between freezing and thawing, delivering and absorbing sensible and latent heat. Extraparticualate additives in the form of finely divided hydrophobic solids prevent the particles from freezing together into a solid block in preparation for their use as a cooling agent. With free-flowing properties thus secured over a wide temperature range, cooling media of this invention are particularly suitable for healthcare applications.

대표청구항 ▼

[ What is claimed is:] [1.] Particulate cooling media comprising:(a) discrete, free-flowing, solid mineral particles having a void volume greater than 0.5 cc/gram, which are highly porous and water absorbent;(b) water disposed in said particles up to their full saturation capacity; and(c) an additiv

[ What is claimed is:] [1.] Particulate cooling media comprising:(a) discrete, free-flowing, solid mineral particles having a void volume greater than 0.5 cc/gram, which are highly porous and water absorbent;(b) water disposed in said particles up to their full saturation capacity; and(c) an additive of finely divided hydrophobic solid dispersed between the particles which is sufficient to intercede between the particles and thereby prevent extrapiculate moisture, if any, from freezing the particles together into a solid mass during freezer storage in preparation for a subsequent cooling application.