Stock material or miscellaneous articles – Structurally defined web or sheet – Continuous and nonuniform or irregular surface on layer or...
Patent
1995-06-07
1997-09-23
Thibodeau, Paul J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Continuous and nonuniform or irregular surface on layer or...
428213, 428329, 428330, 428338, 428339, 428403, 428480, 428694, 428 56SG, 428910, B32B 2736, B32B 2706, B32B 516, B32B 700
Patent
active
056702361
ABSTRACT:
A biaxially oriented polyester film for a magnetic recording medium contains: 1) at least two different sizes of synthetic calcium carbonate particles; and 2) aluminum oxide particles to produce a film with excellent surface uniformity, running properties, and slittability wherein the film generates few scratches and low amounts of abrasion dust. The synthetic calcium carbonate particles are surface treated with a polycarboxylic acid, followed by treatment with a phosphorus compound. The biaxially oriented polyester film can comprise a layer in a multilayer film.
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Endo Kazuo
Harada Takashi
Inagaki Masashi
Kawaguchi Chikakazu
Kotani Tomoyuki
Chen Vivian
Diafoil Hoechst Company, Ltd.
Thibodeau Paul J.
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