Patent · US Expired

Polyester film having improved adhesion properties

US5242756A · kind A · utility

9Cited by

3References

7Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Hartmut Hensel · Schlangenbad, DE
Peter Dinter · Obermoschel, DE
Theo Grosse-Kreul · Wiesbaden, DE
John D. Gribbin · Schlangenbad, DE

Key dates

Filing date	Dec 20, 1990
Grant date	Sep 7, 1993
Priority date	—
Expiry date	Dec 20, 2010

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31786
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The biaxially stretch oriented, corona-treated polyester film, in particular polyethylene terephthalate film, is suitable as a base film for magnetic coatings. It exhibits the following features: at least one of its two surfaces exhibits a surface tension of at least 43 mN/m without an adhesion promoter having been added; the modulus of elasticity in the machine direction and/or transverse direction is greater than 5800 N/mm.sup.2 ; and the refractive index perpendicular to the film plane is less than or equal to 1.4900.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.