公开(公告)号：US11655062B2

公开(公告)日：2023-05-23

申请号：US17219452

申请日：2021-03-31

申请人： SK microworks Co., Ltd.

发明人： Chul Kyu Kim ,  Yongdeuk Kim

IPC分类号： B65B53/02 ,  B29C48/00 ,  B29C48/08 ,  B29C55/00 ,  B29C55/02 ,  C08G63/183 ,  C08J5/18 ,  B29K67/00 ,  B29K105/02

CPC分类号： B65B53/02 ,  B29C48/0018 ,  B29C48/08 ,  B29C55/005 ,  B29C55/02 ,  C08G63/183 ,  C08J5/18 ,  B29C2948/92209 ,  B29C2948/92476 ,  B29K2067/00 ,  B29K2105/02 ,  C08J2367/02 ,  Y10T428/1328

摘要： A heat shrinkable film shows a heat shrinkage rate in the direction perpendicular to the main shrinkage direction that is not high even at high temperature and is printable thereon. The heat shrinkable film includes a polyester resin, wherein the heat shrinkage characteristics in the direction perpendicular to the main shrinkage direction satisfy the following Relationships 1 and 2:

−15≤ΔT70-65≤0  Relationship 1

0≤ΔT100-95≤5  Relationship 2



wherein ΔTX-Y is a value obtained by subtracting heat shrinkage rate of the heat shrinkable film in the direction perpendicular to the main shrinkage direction after the heat shrinkable film is immersed in water bath for 10 seconds at Y° C. from heat shrinkage rate of the heat shrinkable film in the direction perpendicular to the main shrinkage direction after the heat shrinkable film is immersed in water bath for 10 seconds at X° C.