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:
Aug. 13, 1996
Filed:
Oct. 04, 1995
Applicant:
Inventors:
Assignee:
SKC, Limited, Kyungki-do, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D01D / ;
U.S. Cl.
CPC ...
2642105 ; 528272 ; 528302 ; 528308 ; 5283086 ; 528481 ; 5285 / ; 528503 ; 2641761 ; 26417717 ; 26417719 ; 26421111 ;
Abstract
A polyester film having excellent heat resistance and insulation property is produced by the inventive process which comprises: melt-extruding a polyester resin into a sheet, extending the sheet to shape it into a film and treating the film thermally to heat-set, wherein the polyester resin has an intrinsic viscosity of 0.7 to 0.75 dl/g and other portions which satisfy formula (1) and the thermal treatment is carried out so that formula (2) is satisfied: