Oriented polyester film

Details Oriented polyester film Oriented polyester film

1993-03-17

1994-05-17

Acquah, Samuel A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528 87, 528110, 528112, 528176, 528219, 528272, 528297, 528298, 528300, 528308, 525437, 525438, 525449, 2642107, 428480, 360134, C08G 6300

Patent

active

053128931

ABSTRACT:
An oriented polyester film (A) which comprises modified polyethylene-2,6-naphthalenedicarboxylate containing a 4,4'-diphenyldicarboxylic acid component and having a heat of crystallization of 16 to 25.5 Joule/g, and (B) which is biaxially oriented; and an oriented polyester film (A') which comprises modified polyethylene-2,6-naphthalenedicarboxylate containing of a glycol component derived from a compound represented by the following formula, ##STR1## wherein each of n and m is independently a positive number of 1 to 9 as an average, provided that m+n equals 2 to 9 as an average and having a heat of crystallization of 6 to 20 Joule/g, and (B) which is biaxially oriented. These films are useful as a base film for a magnetic recording tape or as an electric insulation film.

REFERENCES:
patent: 3935166 (1976-01-01), Kanai et al.
patent: 4619869 (1986-10-01), Kiriyama et al.
patent: 4761327 (1988-08-01), Hamano et al.

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