Polyester film having improved adhesion properties

Details Polyester film having improved adhesion properties Polyester film having improved adhesion properties

1990-12-20

1993-09-07

Thibodeau, Paul J.

Stock material or miscellaneous articles

Composite

Of polyester

428694ST, 428900, 428910, 428694SG, 2041921, B32B 2706, G11B 566

Patent

active

052427560

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.

REFERENCES:
patent: 3950206 (1976-04-01), Adachi et al.
patent: 4524108 (1985-06-01), Kawakami
patent: 4710421 (1987-12-01), Ono et al.

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