Packaging laminate for bags

• US 6,403,176 B1
• Filed: 02/05/1998
• Issued: 06/11/2002
• Est. Priority Date: 12/08/1993
• Status: Expired due to Fees

• Current Assignee: Andre Patouraux, Philippe Patouraux
• Original Assignee: Andre Patouraux, Philippe Patouraux
• Inventors: Patouraux, Andre, Patouraux, Philippe
• Primary Examiner(s): DYE, RENA
• Application Number:
  US09/019,111
• Time in Patent Office: 1,587 Days
• Field of Search: 428/516, 428/518, 428/520, 428/195, 428/201, 428/483, 428/458, 428/461, 428/463, 428/910, 428/35.2, 428/35.4, 428/337, 428/339, 428/340, 156/244.11
• US Class Current: 428/35.2
• CPC Class Codes: B32B 15/08 of synthetic resin
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: B65B 31/04 Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied
• CPC Class Codes: B65D 2565/387 Materials used as gas barriers
• CPC Class Codes: B65D 81/2084 in a flexible container
• CPC Class Codes: F16K 15/18 with actuating mechanism; Combined check valves and actuated valves
• CPC Class Codes: Y02W 30/80 Packaging reuse or recycling, e.g. of multilayer packaging bio-packaging Y02W90/10
• CPC Class Codes: Y10S 428/91 Product with molecular orientation
• CPC Class Codes: Y10T 428/1334 Nonself-supporting tubular film or bag [e.g., pouch, envelope, packet, etc.]
• CPC Class Codes: Y10T 428/24802 Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
• CPC Class Codes: Y10T 428/24851 Intermediate layer is discontinuous or differential
• CPC Class Codes: Y10T 428/266 of base or substrate
• CPC Class Codes: Y10T 428/269 including synthetic resin or polymer layer or component
• CPC Class Codes: Y10T 428/27 Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.]
• CPC Class Codes: Y10T 428/273 of coating
• CPC Class Codes: Y10T 428/31681 Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
• CPC Class Codes: Y10T 428/31692 Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31786 Of polyester [e.g., alkyd, etc.]
• CPC Class Codes: Y10T 428/31797 Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31913 : Monoolefin polymer
• CPC Class Codes: Y10T 428/3192 : Next to vinyl or vinylidene chloride polymer

Abstract

The present invention relates to improved cover laminates with high performance for forming covers for industrial packaging. The laminates include substantially one layer of metallized polyester, and one or two layers of a special polyethylene layer supplied as a crossed film. The laminate may be made by an extrusion process carried out at 300° C., by glue lamination, or a combination of the two.

Claims

1. A packaging cover, comprising at least:

a polymer cross-ribbed film with a layer weight in the range 45 and 300 g/sqm,

a substantially gas-permeable film, and

a strong printable laminate,

wherein the polymer cross-ribbed film is a biaxially-stretched laminated film of at least three plies of polyolefins, so as to obtain by laminating and stretching an interlock arrangement, an inner portion of the laminated film comprising a mixture of olefins, the inner portion including at least one of said three plies of polyolefin.

2. A packaging cover according to claim 1, wherein the strong printable laminate is a second crossed film.

3. A packaging cover according to claim 1, wherein the strong printable laminate is a polyester laminate.

4. A packaging cover according to claim 1, wherein the strong printable laminate is formed from a material selected from the group consisting of polyethylene terephthalate (PET) and polyethylene naphthalate (PEN) laminates.

5. A packaging cover according to claim 1, wherein the strong printable laminate is metallized.

6. A packaging cover according to claim 1, wherein the polymer cross-ribbed film has a layer weight in the range of 70-180 gm/sgm.

7. A packaging cover according to claim 1, wherein the substantially gas-impermeable film includes an aluminum foil having a thickness in the range of 7-25 μ

m.

8. A packaging cover according to claim 1, further comprising a tie-layer between the polymer cross-ribbed film and the substantially gas-impermeable film.

9. A packaging cover according to claim 1, further comprising a tie-layer between the substantially gas-impermeable film and the strong printable laminate.

10. A packaging cover according to claim 1, wherein adjacent layers are secured together by extrusion.

11. A packaging cover according to claim 1, wherein adjacent layers are secured together by a glue lamination.

12. A packaging cover according to claim 1, wherein adjacent layers are secured together both by extrusion and a glue lamination.

13. A packaging cover comprising:

a metallized polyester laminate;

a first low density polyethylene (LDPE) laminate over the metallized polyester laminate;

an aluminum foil over the first LDPE laminate;

a second LDPE laminate over the aluminum foil; and

a polymer cross-ribbed film over the second LDPE laminate, the polymer cross-ribbed film being a biaxially-stretched laminated film of polyolefins, so as to obtain by laminating and stretching an interlock arrangement, an inner portion of the polymer cross-ribbed film comprising a mixture of olefins, the inner portion of the polymer cross-ribbed film including at least one of said polyolefins.

14. A packaging cover, comprising

a metallized polyester laminate;

a first LDPE layer over the metallized polyester laminate;

a first polymer cross-ribbed film layer over the first LDPE layer;

a second LDPE layer over the first polymer cross-ribbed film layer;

an aluminum foil over the second LDPE layer;

a third LDPE layer over the aluminum foil; and

a second polymer cross-ribbed film including a biaxially-stretched laminated film of polyolefins, so as to obtain by laminating and stretching an interlock arrangement, an inner portion of the second polymer cross-ribbed film comprising a mixture of olefins, the inner portion of the second polymer cross-ribbed film including at least one of said polyolefins.