| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a water-repellent, highly humidity-conditioning Japanese paper sheet material having excellent humidity-conditioning functions over medium humidity and high humidity regions and even having a thin shape while having feeling and texture of Japanese paper, providing excellent designability and operability, and mild to the environment after disposal, and to provide a method for producing the sheet material. <P>SOLUTION: The water-repellent, highly humidity-conditioning Japanese paper sheet material is produced as follows. A natural fiber material of an auxiliary feedstock, having a diameter nearly equal to that of a hemp fiber material of a main feedstock and also having good entangling properties is mixed with the hemp fiber material, and a fiber material having an average fiber diameter and an average fiber length smaller than those of the hemp fiber material and the natural fiber material is added thereto as a space-regulating fiber material. The resultant mixture is subjected to papermaking to provide a base material paper layer 1. A humidity-conditioning paper layer 2 formed on the base material paper layer 1 in a layered state by papermaking, and obtained by adding a calcium silicate hydrate powder having a prescribed particle degree not permeating into the fiber space of the base material paper layer 1 to the hemp fiber material and the natural fiber material of the auxiliary feedstock contained in the base material paper layer 1, and a decorative paper layer 3 formed on the humidity-conditioning layer 2 in a layered state by papermaking, obtained by applying water-repellent processing onto the surface and having air permeability are laminated and integrated on the base material paper layer 1. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
