| 摘要 |
Provided is a porous net material having desired through-holes that is obtained by producing a regular-shaped mesh type film without using a hot-melt adhesive containing a foaming agent. The porous net material comprises a porous heat bonding sheet wherein a hot-melt adhesive film, which is produced from a hot-melt adhesive free from a foaming agent, is laminated on one face of a base material having fine through-holes. The through-holes of the base material are formed by plain weaving a yarn material. In the hot-melt adhesive film, a bridging part (5) formed of said adhesive material extends obliquely, relative to the stretching direction of the yarn material, from a top of the plain woven base material to the adjacent top of the base material so as to form through-holes (4) each having a rhomboidal shape. |
