公开(公告)号：US20230331987A1

公开(公告)日：2023-10-19

申请号：US18021689

申请日：2021-09-13

Applicant: UNITIKA LTD.

Inventor： Yusuke YAGI ,  Ami HIROTA ,  Makoto NAKAI ,  Takeshi MARUO ,  Naoki TAKAISHI

IPC: C08L77/10 ,  C08G69/26

CPC classification number: C08L77/10 ,  C08G69/265 ,  C08L2203/16 ,  C08L2201/08

Abstract: The present invention provides a polyamide and a polyamide film which are more sufficiently superior in all of heat-resisting properties, flexibility properties and rubber elastic properties. The present invention relates to a polyamide comprising a unit comprised of an aliphatic dicarboxylic acid (A) having 18 or more carbon atoms, a unit comprised of an aliphatic diamine (B) having 18 or more carbon atoms, a unit comprised of an aromatic dicarboxylic acid (C) having 12 or less carbon atoms and a unit comprised of an aliphatic diamine (D) having 12 or less carbon atoms, wherein the polyamide has a melting point of 240° C. or more, a crystalline melting enthalpy of 20 J/g or more and an elongation recovery rate of 50% or more in a hysteresis test, and a polyamide film comprising the polyamide.