Method of making a multilayer film
First Claim
Patent Images
1. A method of making a multilayer film suitable for packaging medical solutions comprising:
- (a) blending an ethylene copolymer with a carbonate of an alkali metal; and
(b) coextruding a core layer of a polymeric material which imparts flexibility to the film, a sealant layer, an outer layer of a flexible polymeric material, and first and second intermediate adhesive layers;
wherein said first adhesive layer bonds the core layer to the sealant layer; and
wherein said second adhesive layer bonds the core layer to the outer layer;
said adhesive layers comprising ethylene copolymer, and at least one of the adhesive layers comprising the blend of (a).
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention involves a method of making a multilayer film suitable for medical solution applications. Solution pH is controlled by the addition of a carbonate of an alkali metal to an ethylene ester or modified ethylene ester copolymer to form a blend, followed by the coextrusion of a core layer, first and second adhesive layers, and a sealant and outer layer to form a multilayer film having the blend in at least one of the adhesive layers. Alternatively, the blend may be present in the core layer.
55 Citations
14 Claims
-
1. A method of making a multilayer film suitable for packaging medical solutions comprising:
-
(a) blending an ethylene copolymer with a carbonate of an alkali metal; and (b) coextruding a core layer of a polymeric material which imparts flexibility to the film, a sealant layer, an outer layer of a flexible polymeric material, and first and second intermediate adhesive layers; wherein said first adhesive layer bonds the core layer to the sealant layer; and wherein said second adhesive layer bonds the core layer to the outer layer; said adhesive layers comprising ethylene copolymer, and at least one of the adhesive layers comprising the blend of (a). - View Dependent Claims (2, 3, 7, 8, 11, 12)
-
-
4. A method of making a multilayer film suitable for packaging medical solutions comprising:
-
(a) blending a polymeric material which imparts flexibility to the film with a carbonate of an alkali metal; and (b) coextruding a core layer of the blend of (a), a sealant layer, an outer layer of a flexible polymeric material, and first and second intermediate adhesive layers; wherein said first adhesive layer bonds the core layer to the sealant layer; and wherein said second adhesive layer bonds the core layer to the outer layer; said adhesive layers comprising ethylene copolymer. - View Dependent Claims (5, 6, 9, 10, 13, 14)
-
Specification