Packaging material and method for providing a packaging material
AssigneeTetra Laval Holdings & Finance S.A.
InventorMattias Lennartsson
Life of this patent
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Abstract
A packaging material having a core layer and inside and outside laminate portions is provided. The packaging material comprises a first area to form a first package, and a second area to form a second and adjacent package. The first area and the second area have a transversal sealing area between them, and the core layer is provided with at least one weakening portion at the transversal sealing area.
Claims17
A web of packaging material to be formed into plural packages, the web of packaging material comprising a core layer and an inside laminate portion to be directed towards an inside of the packages formed from the packaging material and comprising a layer of a heat sealable thermoplastic polymer, said web of packaging material comprising a first area to form a first package of the plural packages, a second area to form a second and adjacent package of the plural packages, and a transversal sealing area-extending in a transversal direction across a width of the web, located between the first area and the second area, wherein the transversal sealing area comprises an upper transversal sealing area for accommodating an upper end seal of the first package, a lower transversal sealing area for accommodating a lower end seal of the second package, and a transversal cutting area arranged between the upper and lower transversal sealing areas, for accommodating a linear transversal cut along a center of an entire extension of the transversal cutting area when cutting off individual packages formed from the web of packaging material, and wherein the core layer is provided with at least one weakening portion at the transversal sealing area, the weakening portion of the core layer existing before formation of the upper end seal and the lower end seal.
A method for providing a web of packaging material, comprising:
- providing a core layer with at least one weakening portion, and
- the core layer including a first area intended to form a first package, and a second area-intended to form a second and adjacent package, and a transversal sealing area extending in a transversal direction across a width of the web, located between the first area and the second area, wherein the transversal sealing area comprises an upper transversal sealing area for accommodating an upper end seal of the first package, a lower transversal sealing area for accommodating a lower end seal of the second package, and a transversal cutting area arranged between the upper and lower transversal sealing areas, for accommodating a linear transversal cut along a center of an entire extension of the transversal cutting area when cutting off individual packages formed from the web of packaging material,
- laminating an inside laminate portion to one side of the core layer, the inside laminate portion to be directed towards an inside of a package formed from the packaging material and comprising a layer of a heat sealable thermoplastic polymer, wherein
- the at least one weakening portion of the core layer is positioned at the transversal sealing area of the core layer before the laminating of the inside laminate portion to the one side of the core layer.
Dependencies are inferred from the claim text.