公开(公告)号：US20190263995A1

公开(公告)日：2019-08-29

申请号：US16320056

申请日：2017-04-06

Applicant: NITTO DENKO CORPORATION

Inventor： Masayoshi NAKAMURA ,  Masayuki HODONO ,  Takahiko ITO ,  Naoki NAGAOKA ,  Tomoaki HISHIKI

IPC: C08J9/26 ,  C08G73/10 ,  C08J5/18 ,  B32B7/022 ,  B32B7/025 ,  B32B27/08 ,  B32B27/28

Abstract: Provided is a low-dielectric porous polymer film having a low dielectric constant at high millimeter-wave frequencies and thereby useful as a sheet for a millimeter-wave antenna. The low-dielectric porous polymer film comprises: a base material layer made of a polymer material and formed with fine pores dispersed therein; and a substantially smooth skin layer made of the same polymer material as that of the base material layer and formed on at least one of the surfaces of the base material layer.