公开(公告)号：US20210108027A1

公开(公告)日：2021-04-15

申请号：US16603580

申请日：2018-04-16

Applicant: TOYOBO CO., LTD.

Inventor： Soichiro MINAMI ,  Hideto OHASHI ,  Masayuki HARUTA ,  Shintaro ISHIMARU

IPC: C08G63/183 ,  C08G63/672 ,  B29C61/06

Abstract: The invention provides a polyester resin for heat-shrinkable film which contains terephthalic acid as a main component of a dicarboxylic acid component, contains ethylene glycol as a main component of a diol component, and contains from 18 to 32% by mol of neopentyl glycol and from 8 to 16% by mol of diethylene glycol when a total amount of the whole diol component in total polyester resin components is taken as 100% by mol. The polyester resin has an intrinsic viscosity (IV) of from 0.70 to 0.86 dl/g, a carboxyl end group concentration (AV) of from 8 to 25 eq/t, and a color b value of from 1.0 to 12.0 in an L*a*b color system. The invention also provides a heat-shrinkable film prepared from the aforementioned polyester resin, as well as a heat-shrinkable label and packaged product.