Biaxially oriented polyethylene-2,6-naphthalene-dicarboxylate fi

Details Biaxially oriented polyethylene-2,6-naphthalene-dicarboxylate fi Biaxially oriented polyethylene-2,6-naphthalene-dicarboxylate fi

1994-06-10

1995-01-10

Acquah, Samuel A.

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

528272, 528274, 528275, 528298, 524430, 524444, 524604, 524786, 2641761, 2642107, 428213, 428220, 428364, 428402, B32B 704

Patent

active

053805771

ABSTRACT:
A biaxially oriented polyester film, (A) which is formed from polyethylene-2,6-naphthalenedicarboxylate containing 0.01 to 1% by weight of inert solid fine particles having an average particle size of 0.05 to 3 .mu.m, (B) which has a refractive index, in a film thickness direction, of at least 1.498, and (C) which has a Young's modulus, at least in one direction, of at least 700 kg/mm.sup.2 ; and a process for the production thereof. This film is useful as a magnetic recording medium, particularly as a base film excellent in abrasion resistance and tear resistance.

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