PROBLEM TO BE SOLVED: To provide a laminate sheet comprising a nanofiber layer, which includes a thickening polysaccharide having a thickening action or a gelation action when dissolved in water, disposed on a sheet layer.SOLUTION: In a laminate sheet comprising a nanofiber layer disposed on a sheet layer, the nanofiber layer including a thickening polysaccharide can easily be gelated when brought into contact with a solvent such as water by making the nanofiber layer be in a form of which the particles mainly formed of the thickening polysaccharide are dispersed in fibers mainly formed of a water-soluble polymer. The laminate sheet comprises the sheet layer and the nanofiber layer disposed on the sheet layer, in which the nanofiber layer includes the water-soluble polymer and the thickening polysaccharide, and at least a portion of the thickening polysaccharide exists in the gap of the nanofiber as particles.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】水溶時に増粘作用又はゲル化作用を有する増粘性多糖類を含むナノ繊維層をシート層上に設けた積層シートの提供。【解決手段】シート層上にナノ繊維層を設けた積層シートにおいて、このナノ繊維層が、主に水溶性ポリマーにより形成される繊維に、主に増粘性多糖類により形成される粒子が分散する形態をとることにより、増粘性多糖類を含むナノ繊維層を水等の溶媒との接触により容易にジェル化させることができる。本発明は、シート層及び該シート層上に設けたナノ繊維層から成る積層シートであって、該ナノ繊維層が水溶性ポリマー及び増粘性多糖類を含み、該増粘性多糖類の少なくとも一部が、ナノ繊維の隙間に粒子状に存在する積層シートである。【選択図】図2
