| 摘要 |
<p>The present invention relates to a single-layer porous resin sheet containing a thermoplastic resin, which is characterized by having a thickness of 1.0 mm or more, a dielectric constant at 1 GHz of 2.00 or less, a dielectric loss tangent of 0.0050 or less and an elastic modulus of 200 MPa or more. The present invention also relates to a method for producing the porous resin sheet, which comprises at least: a gas impregnation step wherein a thermoplastic resin composition containing a thermoplastic resin is impregnated with a non-reactive gas under pressure; and a foaming step wherein the thermoplastic resin composition is caused to foam by reducing the pressure after the gas impregnation step.</p> |
