Biaxially oriented polyester film for lamination onto metal shee

Details Biaxially oriented polyester film for lamination onto metal shee Biaxially oriented polyester film for lamination onto metal shee

1994-11-10

1997-11-11

Michl, Paul R.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524423, 524425, 524493, 524497, 524601, 524604, 524605, 428 358, 428458, 428480, B32B 2706

Patent

active

056865104

ABSTRACT:
A biaxially oriented polyester film made of a polyester composition,
(A) which polyester composition comprises (a) an aromatic copolyester having a melting point of 210-245.degree. C., (b) first inert fine solid particles having an average particle diameter of 0.05 to 0.6 .mu.m, and (c) second inert fine solid particles having an average particle diameter of 0.3 to 2.5 .mu.m, the ratio of the average particle diameter of the second inert fine solid particles to the average particle diameter of the first inert fine solid particles being at least 2.5, and the amounts of the components (b) and (c) being 0.01 to 3% by weight and 0.001 to 0.2% by weight, respectively, based on the total weight of the components (a), (b) and (c);
(B) which polyester film has a plane orientation coefficient of 0.08 to 0.16; and,
(C) which polyester film shows excellent moldability when laminated onto a metal sheet and subjected to deep drawing.
A can for drinks, foods, etc. having excellent heat resistance and flavor-retaining property can be produced from a metal sheet onto which the above biaxially oriented polyester film is laminated.

REFERENCES:
patent: 3884870 (1975-05-01), Dodson et al.
patent: 4761327 (1988-08-01), Hamano et al.
patent: 4778708 (1988-10-01), Nishino et al.
patent: 5077118 (1991-12-01), Hasegawa et al.
patent: 5240779 (1993-08-01), Ono et al.
Database WPI Week 9116, Derwent Publications Ltd., London, GB; AN 91-114479 & JP-A-03 056 538 (Teijin K>K>) 12 Mar. 1991.

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