国家/地区 中国（3）
IPC部 C（3） H（2）
IPC大类 C08（3）
IPC小类 C08J（3） C08L（3） C08K（2）
IPC C08L079/08（3）
发明人 LI C（3）
公开年 2022（2）
申请年 2022（3）
专利权人

Double-sided polyimide film with function of absorbing electromagnetic wave, has two layers polyimide film substrate whose upper and lower parts are provided with first trapezoidal groove, and second filter coating provided with second trapezoidal platform inserted into second trapezoidal groove.

PU G, TAN Z, ZHANG G, XU W, LI C

Shell useful for sounding device and electronic device, comprises microcellular foam shell part (engineering plastic materials).

LI C, WANG T, ZHOU H

Preparing ultra-light polyurethane imide material porous comprises e.g. adding pyromellitic dianhydride and methanol to dimethylformamide to dissolve, adding conductive carbon material castor oil, ionic water, silicone oil, tertiary amine catalyst and organic tin catalyst and stirring.

WU Q, SHI R, LI C, QIN L, ZOU H, LV X, YAO A, SHU Q