Packaging laminate for bags
First Claim
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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.
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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.
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Citations
14 Claims
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1. A packaging cover, comprising at least:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A packaging cover comprising:
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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.
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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.
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Specification