| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a vacuum heat insulating material capable of maintaining heat insulating performance even when the vacuum inside the vacuum heat insulating material is lowered. <P>SOLUTION: This vacuum heat insulating material 1 is equipped with an enclosing material 200, and a core material 100 stored inside the enclosing material 200. The enclosing material 200 is composed capable of maintaining the inside thereof to a depressurized state. The core material 100 is composed by laminating a plurality of sheets of non-woven fabric 110. The non-woven fabric 110 is formed by laminating warp layers 111 and weft layers 112. Each of the warp layer 111 and the weft layer 12 is drawn or rolled in one direction so that fibers 111a and fibers 112a composing each of the warp layer 111 and the weft layer 112 are molecularly oriented. In the non-woven fabric 110, the warp layers 111 and the weft layers 112 are laminated so that the directions of drawing or rolling of the warp layers 111 and the weft layers 112 are not parallel with each other. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
