Patent ID: 11965069
Assignee: FAR EASTERN NEW CENTURY CORPORATION
Field: Other special machines (Mechanical engineering)
Classification: CPC C | IPC C

Claim 8:
9. The heat-shrinkable polyester film according to claim 1, having a heat-shrinkability which is measured according to JIS Z1709 after immersing said heat-shrinkable polyester film in hot water for 10 seconds and then removing from the hot water, said heat-shrinkable polyester film satisfying relationships of

Δ(70−60)TD%=(70° C.TD%−60° C.TD%)/(70° C.−60° C.)≥1.5%/° C., and

Δ(90−80)TD%=(90° C.TD%−80° C.TD%)/(90° C.−80° C.)1%/° C.,

where
60° C. TD %, 70° C. TD %, 80° C. TD %, and 90° C. TD % represent the values of the heat-shrinkability in a transverse direction when the hot water is 60° C., 70° C., 80° C., and 90° C., respectively.