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:
Dec. 05, 2000
Filed:
Oct. 08, 1997
Applicant:
Inventors:
Assignee:
Unitika Ltd., Hyogo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B65D / ; B65D / ; C08F / ;
U.S. Cl.
CPC ...
428480 ; 428 352 ; 428 357 ; 428 3692 ; 428910 ; 525444 ; 2065241 ; 383201 ;
Abstract
The present invention provides a biaxially oriented polyester film having a linearly tearable property at least in a longitudinal direction, and excellent in the producability at mass production scale, which can be produced from the mixture of polybutylene terephthalate containing 5 to 20% by weight of a polytetramethylene glycol (PTMG) unit having a molecular weight of 600 to 4,000 (modified PBT) and polyethylene terephthalate (PET) in a weight ratio (PET/modified PBT) of 70/30 to 95/5.