The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 26, 2022
Filed:
Apr. 13, 2020
Far Eastern New Century Corporation, Taipei, TW;
FAR EASTERN NEW CENTURY CORPORATION, Taipei, TW;
Abstract
A heat-shrinkable polyester film is made of a polyester resin composition, and has first and second crystal melting peaks at a respective one of first and second melting temperatures determined via differential scanning calorimetry. The heat-shrinkable polyester film further has a melting enthalpy in a range of larger than 0 J/g and at most 7 J/g which is calculated via integration of an area below the second crystal melting peak. The polyester resin composition includes a first polyester resin having a glass transition temperature ranging from 40° C. to 80° C., and a second polyester resin having a crystal melting temperature ranging from 220° C. to 250° C. and a melting enthalpy ranging from 40 J/g to 60 J/g.