Processing

Please wait...

Settings

Settings

Goto Application

1. WO2020117399 - LAMINATION FILM AND ADHESIVE THEREFOR

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

WHAT IS CLAIMED IS:

1. A film structure comprising:

(a) at least one functionalized film layer, wherein the at least one functionalized film layer comprises a polar-reactive group polyolefin layer used as an internal lamination layer in the film structure; and

(b) a lamination adhesive composition present on, and in contact with, a least a portion of a surface of the internal layer;

wherein the chemical resistance value of the lamination adhesive composition is a bond strength sufficient for the laminate to withstand a measured adhesion force of at least 200 g-f/in when the laminate is subjected to a delamination test accompanied by a failure mode of tearing or no failure mode.

2. The film structure of claim 1, wherein the at least one functionalized film layer is a monolayer.

3. The film structure of claim 1, wherein the at least one functionalized film layer comprises a multilayer of two or more layers, wherein at least one of the two or more layers is an internal layer of a polar-reactive group polyolefin layer, and at least one of the two or more layers is an external layer.

4. The film structure of claim 1, wherein the polar active group polyolefin layer is selected from the group consisting of a grafted ethylene polar copolymer; a physical blend of a non-polar polyethylene and a grafted ethylene polar copolymer; a physical blend of an ethylene vinyl acetate polar copolymer and a grafted ethylene polar copolymer; and a physical blend of a grafted ethylene ethyl acrylate polar copolymer and a grafted ethylene polar copolymer.

5. The film structure of claim 1, wherein the lamination adhesive composition is a general-purpose mono-component adhesive having predominantly isocyanate groups.

6. A process for producing a film structure comprising the steps of:

(i) providing at least one functionalized film layer, wherein the at least one

functionalized film layer is a polar-reactive group polyolefin layer used as an internal layer in the film structure;

(ii) providing a lamination adhesive composition having a sufficient chemical resistance value, wherein the chemical resistance value of the lamination adhesive composition is a bond strength sufficient for the laminate to withstand a measured adhesion force of at least 200 g-f/in when the laminate is subjected to a delamination test accompanied by a failure mode of tearing or no failure mode; and

(iii) applying the lamination adhesive composition to a least a portion of a surface of the internal layer to form a combination film structure of the internal layer and the lamination adhesive composition.

7. A laminate comprising:

(A) at least one functionalized film layer, wherein the at least one functionalized film layer is a polar-reactive group polyolefin layer used as an internal layer in the laminate;

(B) a lamination adhesive composition present on, and in contact with, a least a portion of a surface of the internal layer; wherein the chemical resistance value of the lamination adhesive composition is a bond strength sufficient for the laminate to withstand a measured adhesion force of at least 200 g-f/in when the laminate is subjected to a delamination test accompanied by a failure mode of tearing or no failure mode; and

(C) at least one polar or non-polar substrate; wherein at least a portion of a surface of the substrate is in contact with the adhesive composition;

wherein a laminate is formed comprising the at least one functionalized film layer bonded to the at least one polar or non-polar substrate by the lamination adhesive composition disposed in between the at least one functionalized film layer and the at least one polar or non polar substrate.

8. The laminate of claim 7, wherein the polar substrate is selected from the group consisting of polyethylene terephthalate, bi-oriented poly amide, metalized polyethylene terephthalate, metalized bi-oriented poly amide, and aluminum foil; and wherein the non-polar substrate is selected from the group consisting of polypropylene, polyethylene, and bi-oriented poly amide, and cast polypropylene.

9. A laminated article comprising a pouch, a sachet, a stand-up pouch, or other bag member made from the laminate of claim 7.

10. A process for producing a laminate including at least a first layer and at least a second layer comprising the steps of:

(I) providing at least one functionalized film layer forming the at least first film layer, wherein the at least one functionalized film layer is a polar-reactive group polyolefin layer used as an internal layer in the laminate;

(II) providing at least one polar or non-polar film substrate forming the at least second film layer;

(III) providing a lamination adhesive composition having a sufficient chemical resistance value, wherein the chemical resistance value of the lamination adhesive composition is a bond strength sufficient for the laminate to withstand a measured adhesion force of at least 200 g-f/in when the laminate is subjected to a delamination test accompanied by a failure mode of tearing or no failure mode;

(IV) applying the lamination adhesive composition to at least a portion of a surface of the at least first film layer to form a combination of an internal film layer and lamination adhesive composition; and

(V) contacting the at least one polar or non-polar film substrate with the adhesive composition present on the at least a portion of the surface of the internal film layer such that the adhesive composition is disposed between the first and second film layers; and wherein at least a portion of a surface of the film substrate is in contact with the adhesive composition to effectuate a bond between the internal film layer and the film substrate to form a laminate.

11. The process of claim 10, wherein the at least second film substrate layer is selected from the group consisting of polyethylene terephthalate, bi-oriented poly amide, metalized polyethylene terephthalate, metalized bi-oriented polypropylene, aluminum foil, polypropylene, polyethylene, bi-oriented polypropylene, and cast polypropylene.

12. A pouch, a sachet, a stand-up pouch, or other bag member made by the process of claim 10.