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. 07, 1998
Filed:
Jul. 03, 1995
Rhone-Poulenc Films, Miribel, FR;
Abstract
The present invention relates to polyester films which have properties making them suitable for closures, especially of pots for fresh dairy products such as yoghurts, cheeses or desserts. It therefore consists of polyester films which have a thickness of 5 to 30 micrometers and which satisfy the use test, exhibiting a crystallinity higher than or equal to 50%, tensile strengths in the lengthwise direction (MDTS) and in the diagonal directions (.+-.45 degrees relative to the lengthwise direction) (TS45) which are such that: (MDTS)+(TS45).ltoreq.40 kg/mm.sup.2 (392.4 MPa) and elongations at break in the lengthwise direction (MDEB) and in the diagonal directions (.+-.45 degrees relative to the lengthwise direction) (EB45) which are such that: (MDEB)+(EB45).gtoreq.290%. The invention also relates to a process for the preparation of such films and to their use for closures.