Gas barrier laminated film and a process for producing same
First Claim
1. A gas barrier laminated film wherein a gas barrier layer (B) has been formed on at least one surface of a film substrate (A), the gas barrier layer (B) being comprised of a composition (b3) of an ethylene-vinyl alcohol copolymer (b1) having an ethylene content of 1˜
- 19 mol % and (meth)acrylic acid polymer (b2).
1 Assignment
0 Petitions
Accused Products
Abstract
Provided is a gas barrier laminated film having no fear of deterioration in transparency and excellent in transparency and gas barrier property at a high humidity as well as a process for producing same. The present invention is featured by a gas barrier laminated film wherein a gas barrier layer (B) has been formed on at least one surface of a film substrate (A), the gas barrier layer (B) being comprised of a composition (b3) of an ethylene-vinyl alcohol copolymer (b1) having an ethylene content of 1˜19 mol % and (meth)acrylic acid polymer (b2). In case the film substrate is coated on at least one surface thereof with a vapor deposition layer of an inorganic oxide or the OPP film is coated on at least one surface thereof with the layer of the modified propylene polymer, the gas barrier laminated film is obtained which is more enhanced in adhesion power to the film substrate.
-
Citations
15 Claims
-
1. A gas barrier laminated film wherein a gas barrier layer (B) has been formed on at least one surface of a film substrate (A), the gas barrier layer (B) being comprised of a composition (b3) of an ethylene-vinyl alcohol copolymer (b1) having an ethylene content of 1˜
- 19 mol % and (meth)acrylic acid polymer (b2).
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
12. A process for producing a gas barrier laminated film, which comprises coextruding polypropylene and the modified propylene polymer (a2) to form a laminated sheet, coating the composition (b3) of the ethylene-vinyl alcohol copolymer (b1) having an ethylene content of 1˜
- 19 mol % and the (meth)acrylic acid polymer (b2) on the laminated sheet at the side of the layer of the modified propylene polymer (a2), and biaxially stretching the resultant laminated film.
- View Dependent Claims (14, 15)
-
13. A process for producing a gas barrier laminated film, which comprises coextruding polypropylene and the modified propylene polymer (a2) to form a laminated sheet, stretching the laminated sheet in longitudinal direction, coating the composition (b3) of the ethylene-vinyl alcohol copolymer (b1) having an ethylene content of 1˜
- 19 mol % and the (meth)acrylic acid polymer (b2) on the laminated sheet at the side of the layer of the modified propylene polymer (a2), and stretching the resultant laminated film in lateral direction.
Specification