WO2018163078A1 - Laminated material for packaging and process for its manufacture - Google Patents

Laminated material for packaging and process for its manufacture Download PDF

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Publication number
WO2018163078A1
WO2018163078A1 PCT/IB2018/051465 IB2018051465W WO2018163078A1 WO 2018163078 A1 WO2018163078 A1 WO 2018163078A1 IB 2018051465 W IB2018051465 W IB 2018051465W WO 2018163078 A1 WO2018163078 A1 WO 2018163078A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
incision
tongue
shaped
laminate material
Prior art date
Application number
PCT/IB2018/051465
Other languages
French (fr)
Inventor
Valerio Binda
Original Assignee
Masterpack S.P.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Masterpack S.P.A. filed Critical Masterpack S.P.A.
Publication of WO2018163078A1 publication Critical patent/WO2018163078A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B65D77/2028—Means for opening the cover other than, or in addition to, a pull tab
    • B65D77/2032—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container
    • B65D77/2044—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure
    • B65D77/2048—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut
    • B65D77/2056—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut the cover being weakened
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B65D77/2068—Means for reclosing the cover after its first opening
    • B65D77/2096—Adhesive means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/02—2 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/748—Releasability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2435/00—Closures, end caps, stoppers
    • B32B2435/02—Closures, end caps, stoppers for containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/10—Container closures formed after filling
    • B65D2577/20—Container closures formed after filling by applying separate lids or covers
    • B65D2577/2025—Multi-layered container, e.g. laminated, coated
    • B65D2577/2033—Multi-layered container, e.g. laminated, coated with one or more layers of container being torn off upon initial opening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/10—Container closures formed after filling
    • B65D2577/20—Container closures formed after filling by applying separate lids or covers
    • B65D2577/2075—Lines of weakness or apertures
    • B65D2577/2091—Lines of weakness or apertures in cover

Definitions

  • the present description relates to a laminated material for packaging, in particular for food use.
  • the present description also relates to a process for manufacturing such a laminated material.
  • a known laminated material is provided with two layers of plastic material joined by a pressure adhesive also known as PSA (Pressure-Sensitive Adhesive), which adhesive allows the separation of a tongue obtained by cutting one of the two layers.
  • PSA Pressure-Sensitive Adhesive
  • Such laminated material can be used to close a container, as for example described in WO 2015/145338 Al, and be provided with an incision also made in the second layer by means of a laser die-cutter, in which case it is necessary to use a layer which is optically opaque to the laser to avoid making the same incision in both materials.
  • a layer which is optically opaque to the laser prevents a product contained in a packaging formed by this material from being seen through the laminated material.
  • US 2005/276525 Al and WO 2011/032064 Al disclose a laminated material according to the preamble of claim 4, which may be tampered by malicious persons who want to open the opening formed in the layers of the laminated material, remove part of the product contained in a packaging comprising the laminated material and closing this opening.
  • Object of the present description is therefore to provide a laminated material free from such drawbacks of US 2005/276525 Al and WO 2011/032064 Al .
  • Said object is achieved with a laminated material and a manufacturing process whose main characteristics are specified in the attached claims. Thanks to the particular shape and mutual arrangement of the incisions made in the two layers, the laminated material according to the present description can be advantageously used for food packaging which can be easily opened and closed, even several times, during use. Moreover, during the first opening of such a packaging, the portion of material laminated near the interruption of the second incision is torn in a controlled manner, so as to show openings due to possible tampering of the packaging itself.
  • openings are obtained by means of mechanical die-cutters, so as to be able to employ substantially transparent layers which allow the vision of a product through the resulting laminated material .
  • FIG. 1 shows a top view of the laminated material
  • Figure 3 shows a rear view of the detail of Figure 2;
  • FIG. 5 shows a schematic view of the process for manufacturing the laminated material of Figure 1.
  • the laminated material comprises at least one first layer 1 or outer layer, which is suitable to be directed towards the outside of a packaging, for example a bag or a tub (not shown in the figures).
  • the first layer 1 is joined to at least one second layer 2 or inner layer, suitable to be facing the packaging, by means of at least one adhesive layer 3 arranged between the layers 1, 2, so as to form a sheet of laminated material, preferably continuous to be wound on a roll.
  • the width and/or the length of the first layer 1 are substantially equal respectively to the width and/or the length of the second layer 2.
  • the first layer 1 and/or the second layer 2 preferably comprise at least one film of plastic material, for example polypropylene, having a thickness comprised between 10 and 40 microns, while the adhesive 3 is preferably a pressure adhesive which allows both the separation of the first layer 1 from the second layer 2 by manual traction and their subsequent adhesion by pressing the first layer 1 on the second layer 2, and/or vice versa.
  • the first layer 1, the second layer 2 and the adhesive 3 are substantially transparent, so that the resulting laminated material is substantially transparent.
  • At least one first tongue-shaped incision 4 is formed in the first layer 1, so as to form in the first layer 1 a tongue-shaped portion la which can be separated from the second layer 2 while keeping the remaining portion lb of the first layer 1 joined to the second layer 2.
  • At least one end of the first incision 4 is provided with a curl 5.
  • a portion lc (shown with dashed lines in Figures 1 to 3) of the first layer 1 which is not in contact with the adhesive layer 3 is arranged around at least one portion of the first incision 4 of the first layer 1, in particular a portion of the first layer 1 corresponding to the tip of the tongue-shaped portion la.
  • Such portion lc can be made by not applying the adhesive 3 in the region 6 between the two layers 1, 2 corresponding to this portion, as in the present embodiment, or by arranging a septum (not shown in the figures) having the same contour of this region 6 or of the portion lc between the first layer 1 and the adhesive layer 3.
  • Such portion lc has, for example, a substantially semicircular or lunette shape, preferably with at least one peninsula Id facing the tip of the first incision 4, namely of the tongue-shaped portion la. Said peninsula Id is thus in contact with the adhesive 3 and helps to keep the tip of the tongue-shaped portion la of the first layer 1 joined to the second layer 2, despite the portion lc without adhesive of the first layer 1.
  • At least one second tongue-shaped incision 7, in particular U-shaped or V-shaped, is formed in the second layer 2, so as to form in the second layer 2 a tongue-shaped portion 2a which can be separated from the second layer 2 while keeping joined to the first layer 1 the remaining portion 2b of the second layer 2.
  • At least one end of the second incision 7 is provided with a curl 8. The second incision 7 is separated from the portion lc of the first layer 1 which is not in contact with the layer of adhesive 3.
  • the second incision 7 is surrounded at least partially by the first incision 4, and/or the tongue-shaped portion la of the first layer 1 completely encloses the tongue-shaped portion 2a of the second layer 2, and/or the tips of the tongue-shaped portions la, 2a of the layers 1, 2 are oriented in the same direction D, which also acts as a symmetry axis for these portions la, 2a, and/or the ends of the first incision 4 and of the second incision 7 are arranged along axes Al, A2 substantially parallel to each other and/or substantially perpendicular to said direction D.
  • the second incision 7 has at least one interruption 9, in particular at the tip of the tongue-shaped portion 2a, where the incision 7 has two substantially rectilinear portions 7a which extend towards the inside of the tongue-shaped portion 2a.
  • a third incision 10, concave-shaped towards the tip of the tongue-shaped portion 2a, is preferably arranged beside the free ends of the two portions 7a of the second incision 7, in a substantially transverse position with respect to these portions 7a.
  • Figure 4 shows also the tongue-shaped portion la of the first layer 1, which, when pulled by a user, separates from the remaining portion lb of the first layer 1 and carries with itself the tongue-shaped portion 2b of the second layer 2, which is joined by the adhesive 3 to the portion la of the first layer 1.
  • the portion of the second layer 2 arranged between the ends of the substantially rectilinear portions 7a and the third incision 10 is torn, so as to act as a tamper indicator.
  • the first layer 1 preferably wound on a first roller 11 is pulled in the direction of the arrows towards one or more first auxiliary rollers 12 which apply on one side of the first layer 1 the adhesive layer 3 taken by a first auxiliary roller 12 from a tank 13.
  • the first auxiliary roller 12 which takes the adhesive 3 from the tank 13 has a cavity having a shape corresponding to the shape of the portion lc of the first layer 1 which is not in contact with the adhesive 3.
  • the adhesive 3 can be applied by a rotogravure or flexographic process, with devices and methods similar to those used for rotogravure or flexographic printing.
  • the first layer 1 provided with adhesive 3 is then joined to the second layer 2, preferably wound on a second roller 14, by second auxiliary rollers 15, so as to obtain a laminated material 16 which can be wound on a third roller 17.
  • at least one mechanical die-cutter in particular a roller die-cutter 18, forms the first incision 4 in the first layer 1 and/or the second incision 7 in the second layer 2.
  • the roller die-cutter 18 can also form the third incision 10 in the second layer 2, as well as further first, second and third incisions.
  • the laminated material 16 can be taken from the third roller 17 and cut to obtain a plurality of sheets, each provided at least with first and second incisions, which can be used to make packaging for food, for example as a cover of a container in which the second layer 2 is joined to the edge of this container, in particular by adhesive or heat-sealing.

Abstract

Laminate material (16) comprising a first layer (1) joined to at least one second layer (2) through at least one adhesive layer (3) disposed between these layers (1, 2), wherein at least one first tongue-shaped incision (4) is made in the first layer (1), so as to form in the first layer (1) a tongue-shaped portion (la) that can be separated from the second layer (2) by keeping joined to the second layer (2) the remaining portion (lb) of the first layer (1), a portion (lc) of the first layer (1) which is not in contact with the adhesive layer (3) being disposed around at least one portion of the first incision (4) of the first layer (1), wherein at least one second tongue-shaped incision (7) is made in the second layer (2), so as to form in the second layer (2) a tongue-shaped portion (2a) which can be separated from the second layer (2) by keeping joined to the first layer (1) the remaining portion (2b) of the second layer (2), the second incision (7) being surrounded at least partially by the first incision (4), wherein the second incision (7) has at least one interruption (9). The present description also relates to a process for manufacturing such a laminated material.

Description

Laminated material for packaging and process for its manufacture
TECHNICAL FIELD The present description relates to a laminated material for packaging, in particular for food use. The present description also relates to a process for manufacturing such a laminated material.
FRAMEWORK OF THE DESCRIPTION
A known laminated material is provided with two layers of plastic material joined by a pressure adhesive also known as PSA (Pressure-Sensitive Adhesive), which adhesive allows the separation of a tongue obtained by cutting one of the two layers.
Such laminated material can be used to close a container, as for example described in WO 2015/145338 Al, and be provided with an incision also made in the second layer by means of a laser die-cutter, in which case it is necessary to use a layer which is optically opaque to the laser to avoid making the same incision in both materials. However, such an opaque layer prevents a product contained in a packaging formed by this material from being seen through the laminated material.
US 2005/276525 Al and WO 2011/032064 Al disclose a laminated material according to the preamble of claim 4, which may be tampered by malicious persons who want to open the opening formed in the layers of the laminated material, remove part of the product contained in a packaging comprising the laminated material and closing this opening.
SUMMARY OF THE DESCRIPTION
Object of the present description is therefore to provide a laminated material free from such drawbacks of US 2005/276525 Al and WO 2011/032064 Al . Said object is achieved with a laminated material and a manufacturing process whose main characteristics are specified in the attached claims. Thanks to the particular shape and mutual arrangement of the incisions made in the two layers, the laminated material according to the present description can be advantageously used for food packaging which can be easily opened and closed, even several times, during use. Moreover, during the first opening of such a packaging, the portion of material laminated near the interruption of the second incision is torn in a controlled manner, so as to show openings due to possible tampering of the packaging itself.
In particular, such openings are obtained by means of mechanical die-cutters, so as to be able to employ substantially transparent layers which allow the vision of a product through the resulting laminated material .
BRIEF DESCRIPTION OF THE DRAWINGS
Further advantages and features of the laminated material and of the process according to the present description will become evident to those skilled in the art from the following detailed and non-limiting description of an embodiment thereof with reference to the attached drawings in which:
- Figure 1 shows a top view of the laminated material;
- Figure 2 shows detail II of Figure 1;
- Figure 3 shows a rear view of the detail of Figure 2;
- Figure 4 shows the enlarged section IV-IV of Figure 3;
- Figure 5 shows a schematic view of the process for manufacturing the laminated material of Figure 1. EXEMPLARY EMBODFMENTS
With reference to Figures 1 to 4, it is seen that the laminated material according to the present description comprises at least one first layer 1 or outer layer, which is suitable to be directed towards the outside of a packaging, for example a bag or a tub (not shown in the figures). The first layer 1 is joined to at least one second layer 2 or inner layer, suitable to be facing the packaging, by means of at least one adhesive layer 3 arranged between the layers 1, 2, so as to form a sheet of laminated material, preferably continuous to be wound on a roll. The width and/or the length of the first layer 1 are substantially equal respectively to the width and/or the length of the second layer 2. The first layer 1 and/or the second layer 2 preferably comprise at least one film of plastic material, for example polypropylene, having a thickness comprised between 10 and 40 microns, while the adhesive 3 is preferably a pressure adhesive which allows both the separation of the first layer 1 from the second layer 2 by manual traction and their subsequent adhesion by pressing the first layer 1 on the second layer 2, and/or vice versa. Preferably, the first layer 1, the second layer 2 and the adhesive 3 are substantially transparent, so that the resulting laminated material is substantially transparent.
At least one first tongue-shaped incision 4, in particular U-shaped or V-shaped, is formed in the first layer 1, so as to form in the first layer 1 a tongue-shaped portion la which can be separated from the second layer 2 while keeping the remaining portion lb of the first layer 1 joined to the second layer 2. At least one end of the first incision 4 is provided with a curl 5.
A portion lc (shown with dashed lines in Figures 1 to 3) of the first layer 1 which is not in contact with the adhesive layer 3 is arranged around at least one portion of the first incision 4 of the first layer 1, in particular a portion of the first layer 1 corresponding to the tip of the tongue-shaped portion la. Such portion lc can be made by not applying the adhesive 3 in the region 6 between the two layers 1, 2 corresponding to this portion, as in the present embodiment, or by arranging a septum (not shown in the figures) having the same contour of this region 6 or of the portion lc between the first layer 1 and the adhesive layer 3. Such portion lc has, for example, a substantially semicircular or lunette shape, preferably with at least one peninsula Id facing the tip of the first incision 4, namely of the tongue-shaped portion la. Said peninsula Id is thus in contact with the adhesive 3 and helps to keep the tip of the tongue-shaped portion la of the first layer 1 joined to the second layer 2, despite the portion lc without adhesive of the first layer 1. At least one second tongue-shaped incision 7, in particular U-shaped or V-shaped, is formed in the second layer 2, so as to form in the second layer 2 a tongue-shaped portion 2a which can be separated from the second layer 2 while keeping joined to the first layer 1 the remaining portion 2b of the second layer 2. At least one end of the second incision 7 is provided with a curl 8. The second incision 7 is separated from the portion lc of the first layer 1 which is not in contact with the layer of adhesive 3.
The second incision 7 is surrounded at least partially by the first incision 4, and/or the tongue-shaped portion la of the first layer 1 completely encloses the tongue-shaped portion 2a of the second layer 2, and/or the tips of the tongue-shaped portions la, 2a of the layers 1, 2 are oriented in the same direction D, which also acts as a symmetry axis for these portions la, 2a, and/or the ends of the first incision 4 and of the second incision 7 are arranged along axes Al, A2 substantially parallel to each other and/or substantially perpendicular to said direction D.
The second incision 7 has at least one interruption 9, in particular at the tip of the tongue-shaped portion 2a, where the incision 7 has two substantially rectilinear portions 7a which extend towards the inside of the tongue-shaped portion 2a. A third incision 10, concave-shaped towards the tip of the tongue-shaped portion 2a, is preferably arranged beside the free ends of the two portions 7a of the second incision 7, in a substantially transverse position with respect to these portions 7a.
Figure 4 shows also the tongue-shaped portion la of the first layer 1, which, when pulled by a user, separates from the remaining portion lb of the first layer 1 and carries with itself the tongue-shaped portion 2b of the second layer 2, which is joined by the adhesive 3 to the portion la of the first layer 1. During this separation the portion of the second layer 2 arranged between the ends of the substantially rectilinear portions 7a and the third incision 10 is torn, so as to act as a tamper indicator.
Referring to Figure 5, it is seen that in a first operating step of the manufacturing process the first layer 1 preferably wound on a first roller 11 is pulled in the direction of the arrows towards one or more first auxiliary rollers 12 which apply on one side of the first layer 1 the adhesive layer 3 taken by a first auxiliary roller 12 from a tank 13. The first auxiliary roller 12 which takes the adhesive 3 from the tank 13 has a cavity having a shape corresponding to the shape of the portion lc of the first layer 1 which is not in contact with the adhesive 3. In alternative embodiments, the adhesive 3 can be applied by a rotogravure or flexographic process, with devices and methods similar to those used for rotogravure or flexographic printing.
The first layer 1 provided with adhesive 3 is then joined to the second layer 2, preferably wound on a second roller 14, by second auxiliary rollers 15, so as to obtain a laminated material 16 which can be wound on a third roller 17. Before being wound on the third roller 17, at least one mechanical die-cutter, in particular a roller die-cutter 18, forms the first incision 4 in the first layer 1 and/or the second incision 7 in the second layer 2. The roller die-cutter 18 can also form the third incision 10 in the second layer 2, as well as further first, second and third incisions.
In a subsequent step, not shown in the figures, the laminated material 16 can be taken from the third roller 17 and cut to obtain a plurality of sheets, each provided at least with first and second incisions, which can be used to make packaging for food, for example as a cover of a container in which the second layer 2 is joined to the edge of this container, in particular by adhesive or heat-sealing.
Any variations or additions may be made by those skilled in the art to the embodiment described and illustrated herein while remaining within the scope of the following claims. In particular, further embodiments may include the technical features of one of the following claims with the addition of one or more technical features described in the text or illustrated in the drawings, taken singularly or in any mutual combination.

Claims

1. Process for manufacturing laminated materials (16), which comprises the following operating steps:
- joining a first layer (1) to at least one second layer (2) by means of at least one adhesive layer (3) disposed between these layers (1, 2);
making at least one first tongue-shaped incision (4) in the first layer (1), so as to form in the first layer (1) a tongue-shaped portion (la) which can be separated from the second layer (2) by keeping joined to the second layer (2) the remaining portion (lb) of the first layer (1), a portion (lc) of the first layer (1) which is not in contact with the adhesive layer (3) being disposed around at least one portion the first incision (4) of the first layer (1);
making at least one second tongue-shaped incision (7) in the second layer (2), so as to form in the second layer (2) a tongue-shaped portion (2a) which can be separated from the second layer (2) by keeping joined to the first layer (1) the remaining portion (2b) of the second layer (2), the second incision (7) being surrounded at least partially by the first incision (4),
characterized in that the second incision (7) has at least one interruption (9).
2. Process according to the preceding claim, characterized in that the first incision (4) and/or the second incision (7) are formed respectively in the first layer (1) and/or in the second layer (2) after the first layer (1) has been joined to the second layer (2).
3. Process according to one of the preceding claims, characterized in that the first incision (4) and the second incision (7) are formed respectively in the first layer (1) and in the second layer (2) by means of at least one mechanical die-cutter (18).
4. Laminate material (16) comprising a first layer (1) joined to at least one second layer (2) through at least one adhesive layer (3) disposed between these layers (1, 2), wherein at least one first tongue-shaped incision (4) is made in the first layer (1), so as to form in the first layer (1) a tongue-shaped portion (la) that can be separated from the second layer (2) by keeping joined to the second layer (2) the remaining portion (lb) of the first layer (1), a portion (lc) of the first layer (1) which is not in contact with the adhesive layer (3) being disposed around at least one portion of the first incision (4) of the first layer (1), wherein at least one second tongue-shaped incision (7) is made in the second layer (2), so as to form in the second layer (2) a tongue-shaped portion (2a) which can be separated from the second layer (2) by keeping joined to the first layer (1) the remaining portion (2b) of the second layer (2), the second incision (7) being surrounded at least partially by the first incision (4), characterized in that the second incision (7) has at least one interruption (9).
5. Process or laminate material (16) according to one of the preceding claims, characterized in that the second incision (7) is separated from the portion (lc) of the first layer (1) which is not in contact with the adhesive layer (3).
6. Process or laminate material (16) according to one of the preceding claims, characterized in that the portion (lc) of the first layer (1) which is not in contact with the adhesive layer (3) has at least one peninsula (Id) in contact with the adhesive layer (3), which is directed towards the tip of the tongue-shaped portion (la) of the first layer (1).
7. Process or laminate material (16) according to one of the preceding claims, characterized in that the tongue-shaped portion (la) of the first layer (1) completely encloses the tongue-shaped portion (2a) of the second layer (2).
8. Process or laminate material (16) according to one of the preceding claims, characterized in that the tips of the tongue-shaped portions (la, 2a) of the layers (1, 2) are oriented towards the same direction (D), which also acts as axis of symmetry for these portions (la, 2a).
9. Process or laminate material (16) according to one of the preceding claims, characterized in that the ends of the first incision (4) and of the second incision (7) are arranged along axes (Al, A2) substantially parallel to each other.
10. Process or laminate material (16) according to one of the preceding claims, characterized in that the second incision (7) has the interruption (9) at the tip of the tongue-shaped portion (2a) of the second layer (2).
11. Process or laminate material (16) according to one of the preceding claims, characterized in that at the interruption (9) the incision (7) has two substantially straight parts (7a) which extend towards the inside of the tongue-shaped portion (2a) of the second layer (2).
12. Process or laminate material (16) according to the preceding claim, characterized in that a third incision (10) is arranged beside the free ends of the two substantially straight parts (7a) of the second incision (7), in a substantially transverse position with respect to these parts (7a).
13. Process or laminate material (16) according to the preceding claim, characterized in that the third incision (10) has a concave shape towards the tip of the tongue-shaped portion (2a) of the second layer (2).
14. Process or laminate material (16) according to one of the preceding claims, characterized in that the first layer (1), the second layer (2) and the adhesive (3) are substantially transparent.
PCT/IB2018/051465 2017-03-07 2018-03-07 Laminated material for packaging and process for its manufacture WO2018163078A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800004234A1 (en) * 2018-04-05 2019-10-05 Laminated material and process for its manufacture, as well as sheet and container made from this laminated material
IT201900002729A1 (en) 2019-02-26 2020-08-26 Masterpack S P A Laminated casing material, process for its manufacture and casing comprising this laminated material
IT202000017455A1 (en) 2020-07-17 2022-01-17 Masterpack S P A SHEET FOR FORMING A CASING, CASING WHICH INCLUDES IT AND MANUFACTURING PROCESS OF THIS CASING

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050276525A1 (en) * 2004-06-11 2005-12-15 Sonoco Development, Inc. Flexible packaging structure with a built-in opening and reclose feature, and method for making same
WO2011032064A1 (en) * 2009-09-11 2011-03-17 Avery Dennison Corporation Resealable laminate for heat sealed packaging

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050276525A1 (en) * 2004-06-11 2005-12-15 Sonoco Development, Inc. Flexible packaging structure with a built-in opening and reclose feature, and method for making same
WO2011032064A1 (en) * 2009-09-11 2011-03-17 Avery Dennison Corporation Resealable laminate for heat sealed packaging

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800004234A1 (en) * 2018-04-05 2019-10-05 Laminated material and process for its manufacture, as well as sheet and container made from this laminated material
WO2019193473A1 (en) * 2018-04-05 2019-10-10 Masterpack S.P.A. Laminated material and process for its manufacture, as well as sheet and container obtained from this laminated material
IT201900002729A1 (en) 2019-02-26 2020-08-26 Masterpack S P A Laminated casing material, process for its manufacture and casing comprising this laminated material
WO2020174389A1 (en) * 2019-02-26 2020-09-03 Masterpack S.P.A. Laminated material for packaging, process for its manufacture and packaging comprising said laminated material
IT202000017455A1 (en) 2020-07-17 2022-01-17 Masterpack S P A SHEET FOR FORMING A CASING, CASING WHICH INCLUDES IT AND MANUFACTURING PROCESS OF THIS CASING

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