Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...
Patent
1984-07-13
1986-10-07
Ziegler, Jacob
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including a second component containing structurally defined...
427127, 427128, 428172, 428325, 428328, 428339, 428694, 428900, B05D 512, B32B 516
Patent
active
046159398
ABSTRACT:
Biaxially drawn, advantageously filled multilayer polyester film substrates, well adapted for the manufacture of magnetic recording tapes, are comprised of a composite of at least two adjacent layers of biaxially stretched thermoplastic polyester film, at least one of the face surfaces thereof having a roughness defined by a plurality of dome and peak protuberances extending therefrom, said domes being present in a concentration of at least 5 per mm.sup.2 and having heights of at least 9/100 of one micron, the ratio of the height of such dome protuberances to the diameter of the base thereof being less than 1/100, and the ratio of the height of such peak protuberances to the diameter of the base thereof being at least 1/100.
REFERENCES:
patent: 3950206 (1976-04-01), Adachi et al.
patent: 4348446 (1982-09-01), Mitsuishi et al.
Corsi Philippe
Eyraud Marcel
Rhone-Poulenc Films
Ziegler Jacob
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