| 摘要 |
<p>PURPOSE:To obtain a sheet-shaped resin material suitable for electric material, sensor material, heat-insulating material, etc., small in dielectric constants, excellent in fluid permeability, adhesiveness, etc. by providing many through holes on a porous sheet-shaped body. CONSTITUTION:A desired sheet-shaped resin material 1 is obtained by providing many through holes 3 on a porous sheet-shaped body 2 consisting of synthetic resin such as tetrafluoroethylene resin etc. by the use of a machine such as a pinhole machine etc.. When the obtained sheet-shaped resin material 1 is stretched in the direction rectangular to its stretching direction, the distance between through holes 4 is not stretched, the tape keeps its initial thickness but the parts of the through holes are stretched and elongated, a sheet-shaped resin material 6 having elliptic and thin through holes 5 is obtained and the effect for reduced dielectric constant in improved further.</p> |
