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

Claim 19:
20. A heat-shrinkable polyester film made of a polyester-forming resin composition comprising terephthalic acid, ethylene glycol, neopentyl glycol, and a polyethylene terephthalate bottle-recycled material in an amount ranging from 15 wt % to 86.7 wt % based on the total mass of the polyester-forming resin composition, and based on a total molar amount of said ethylene glycol and said neopentyl glycol, said ethylene glycol is present in an amount ranging from 70 mol % to 85 mol %, and said neopentyl glycol is present in an amount ranging from 15 mol % to 30 mol %, said heat-shrinkable polyester film having an exothermic crystallization peak and an endothermic melting peak, which are determined via differential scanning calorimetry and which satisfy relationships of

52.9° C.≤T2−T1≤63.7° C. and

53.1° C.≤T3−T2≤73.0° C.,

where
T1 represents an onset point of said exothermic crystallization peak,
T2 represents an end point of said exothermic crystallization peak and an onset point of said endothermic melting peak, and
T3 represents an end point of said endothermic melting peak.