Multi-layered sheet, thermal structure comprising it, and process for producing multi-layered sheet

Abstract

A multi-layered sheet includes a layer of a moisture-permeable base material and a layer of a moisture-permeable resin formed on a surface of the layer of the moisture-permeable base material, wherein the moisture-permeable resin may also be found inside the layer of the moisture-permeable base material and the moisture-permeable resin includes a resin that adheres to the moisture-permeable base material and a water-insoluble powdery or granular material that generates heat by moisture absorption and that is a hydrolysate of a substance derived from a plant and/or hydrolysate of a substance derived from an animal, wherein in the total amount of the moisture-permeable resin, the amount of the resin that adheres to the moisture-permeable base material is 20 to 80 mass % and the amount of the water-insoluble powdery or granular material that generates heat by moisture absorption is 80 to 20 mass %.

Dependencies are inferred from the claim text.