Oriented polyester film

Details Oriented polyester film Oriented polyester film

1994-03-01

1994-10-04

Acquah, Samuel A.

Stock material or miscellaneous articles

Composite

Of polyester

528176, 528185, 528190, 528195, 528272, 528297, 528298, 528308, 428694B, 2642107, B32B 2736

Patent

active

053525345

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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