WO2017153346A1

WO2017153346A1 - A packaging material for liquid food products and a method for producing a container filled with liquid product

Info

Publication number: WO2017153346A1
Application number: PCT/EP2017/055201
Authority: WO
Inventors: Joachim BJURENHEIM; Göran DAHL; Gustav Levander; Mario Tronza; Antonino Lanci; Elmar Mock
Original assignee: Tetra Laval Holdings & Finance S.A.
Priority date: 2016-03-10
Filing date: 2017-03-06
Publication date: 2017-09-14

Abstract

This inventive concept relates to a packaging material (846) comprising a number of container sections configured to be turned into containers for a liquid food product. Each of the container sections comprises a front section, a bottom section, and at least one side section, wherein one of the front section, the bottom section, and the at least one side section comprises a weakened portion (744, 848). The weakened portion is placed in a lower half of the container when the container is placed in an upright position. Further, it is presented related methods for producing a container, and a container produced by the method.

Description

A PACKAGING MATERIAL FOR LIQUID FOOD PRODUCTS AND A METHOD FOR PRODUCING A CONTAINER FILLED WITH LIQUID

PRODUCT

Technical field

The present inventive concept relates to the field of packaging. More particularly, there are disclosed packages with improved features, and related methods and devices.

Background

Many packages for beverages are manufactured in so-called portion volumes, intended to be consumed straight from the package. The majority of these packages are provided as an assembly with a drinking straw in a protective envelope which is secured on the one side wall of the package. The packages, which may have parallelepipedic or tetrahedral configuration, are manufactured from a laminate with a core of paper or paperboard, with different layers of thermoplastics and possibly aluminum foil. On the one wall of the package, most often the upper or top wall, a hole has been punched out in the core layer and this hole is covered by the remaining layers of the laminate. This makes it possible to penetrate the hole with the drinking straw which accompanies the package, resulting in a drinking straw with direct access to the drink enclosed in the package.

A problem with assemblies as described above is that it is difficult to consume the beverage on-the-go. Preparation of the package before consumption is needed, and comprises several steps; removing the protective envelope enclosing the drinking straw from the package, after which the protective envelope is opened to retrieve the drinking straw; inserting the drinking straw into the package; adjusting an end section of the drinking straw to direct the drinking straw into the mouth of the user intending to imbibe the drink. In addition, several of the above mentioned steps require two hands; alternatively, in some steps, a consumer may use one hand in combination with his or her teeth. Further, contaminants from the consumer risk entering the package. Further, the insertion of the drinking straw sometimes requires extensive force, causing contents to spill out of the package. Further, the protective envelope has to be discarded by the user.

Another problem is that the drinking straw may be separated from the package during production or transport, thus forcing the package, including the drink enclosed, to be discarded. Even worse, the problem of the missing drinking straw may not be discovered until the consumer intends to open the package.

Summary of the invention

It is an object of the present inventive concept to mitigate, alleviate, or eliminate one or more of the above-identified deficiencies in the art and disadvantages singly or in combination.

According to a first aspect of the inventive concept, these and other objects are achieved in full, or at least in part, by a packaging material. The packaging material comprises a number of container sections configured to be turned into containers for a liquid food product. Each of the container sections comprises a front section, a bottom section, and at least one side section, wherein one of the front section, the bottom section, and the at least one side section comprises a weakened portion. The weakened portion is placed in a lower half of the container when the container is placed in an upright position.

The weakened portion may be configured to interact with a hollow body comprising a cutting member and a flexible portion such that when the flexible portion is pushed towards the container the cutting member is indirectly pushed through the weakened portion, thereby forming a hole in the container, such that liquid held in the container can be transferred out from the container through the hole into the hollow body.

The packaging material may further comprise a mark in order to facilitate alignment of the weakened portion and the cutting member.

Each of the container sections may comprise a top section, four side sections, and a bottom section, the weakened portion being placed in one of the side sections, the weakened portion being closer to the bottom section than the top section.

The packaging material may further comprise at least one paper board layer and at least one outer coating, wherein the at least one paper board layer is removed in the weakened portion.

The packaging material may further comprise at least one paper board layer and at least one outer coating, wherein the at least one paper board layer and at least one outer coating is removed in the weakened portion.

The packaging material may further comprise at least one paper board layer and at least one outer coating, wherein the weakened portion comprises at least one cut of the at least one paper board layer. The packaging material may further comprise at least one paper board layer and at least one outer coating, wherein the weakened portion comprises at least one cut of the at least one paper board layer and the at least one outer coating.

According to a second aspect of the inventive concept, these and other objects are achieved in full, or at least in part, by a method for producing a container filled with liquid food product. The method comprises forming the container from a packaging material according to the first aspect of the inventive concept; filling the container with liquid food product; and attaching a hollow body to the container such that a cutting member of the hollow body is aligned with a weakened portion of the packaging material.

According to a third aspect of the inventive concept, these and other objects are achieved in full, or at least in part, by a container for a liquid food product produced according to the second aspect of the inventive concept.

Other objectives, features and advantages of the present invention will appear from the following detailed disclosure, from the attached claims as well as from the drawings.

Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [element, device, component, means, step, etc]" are to be interpreted openly as referring to at least one instance of said element, device, component, means, step, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated. Brief description of the drawings

The above, as well as additional objects, features and advantages of the present invention/inventive concept, will be better understood through the following illustrative and non-limiting detailed description of different embodiments of the present invention/inventive concept, with reference to the appended drawings, wherein:

FIG. 1 illustrates a package comprising a container and a drinking device.

FIG. 2 illustrates a partial sectional view of a protective element covering a drinking device.

FIGS. 3a-3c illustrate an opening process of a package comprising a container and a drinking device.

FIG. 4 illustrates an exploded view of a hollow body. FIG. 5 illustrates a cross-sectional view of a hollow body.

FIG. 6 illustrates a cross-sectional view of a weakened portion of a container.

FIG. 7 illustrates a partial sectional view of a weakened portion of a container.

FIG. 8 illustrates a reel of packaging material.

FIGS. 9a-9c illustrate three stages of a cutting member being pushed through a container.

FIG. 10 illustrates an exploded view of an alternative embodiment of a hollow body.

FIGS. 1 1 a-1 1 d illustrate different shapes of a weakened portion of a container.

FIG. 12 illustrate a top view of a first piece of a hollow body.

Detailed description

FIG. 1 illustrates a package 100 comprising a container 102 and a drinking device. The container 102 may be a carton-based container. The container 102 may have a default shape. The container 102 may be designed to change its shape as a result of a difference between an external pressure and an internal pressure. The external pressure may be a pressure exerted by the weight of the Earth's atmosphere, and/or a pressure exerted by the force of a consumer's hand gripping the container 102. The internal pressure is defined as a pressure in an inner space of the container 102. The container 102 may strive towards returning to its default shape. The container 102 may comprise creases such that a change of shape of the container 102 due to the difference between the external pressure and the internal pressure can be controlled. Here, the drinking device can be described as a hollow body 104 comprising a first part 106 fixedly attached to a first section 1 10 of the container 102, and a second part 108 releasably attached to a second section 1 12 of the container 102, such that when the second part 108 is released from the second section 1 12 the second part is pivotable around an intersection point 1 14 between the first part 106 and the second part 108. It is to be understood that the first part 106 is fixedly attached so as to be firm and not readily movable. A first sub-area of the first part may be adhered to the first section. A second sub-area of the second part may be adhered to the second section. The first sub-area may be larger than the second sub-area, such that the first part is fixedly attached to the first section and the second part is releasably attached to the second section. The first section 1 10 may be located on a side wall of the container 102. The second section 1 12 may be located on any surface of the container 102. The hollow body 104 may comprise a first piece and a second piece, wherein at least a portion of a periphery of the first piece is attached to at least a portion of a periphery of the second piece, forming an attachment portion 1 14, in order to form the hollow body. The attachment portion may restrict the second part to be moved in a pre-determined plane. The pre-determined plane may be aligned with a longitudinal axis of the hollow body. A transverse cross-section of the hollow body 102 may be in the shape of a semi-ellipse, such that the second part 108 of the hollow body 102 is restricted to be pivotable around the intersection point 1 14 and around a major axis of the semi-ellipse. The first part 106 may comprise a first transverse cross-section in the shape of a semi- ellipse comprising a first minor axis and a first major axis, wherein the first major axis may extend substantially along the first section 1 10 of the container 102. The second part 108 may comprise a second transverse cross-section in the shape of a semi-ellipse comprising a second minor axis and a second major axis, wherein the second major axis may extend substantially along the second section 1 12 of the container 102. The hollow body 102 may comprise a third part 109 arranged between the first part 106 and the second part 108. The third part 109 may be crimped. The third part 109 may comprise a third transverse cross-section in the shape of a semi- ellipse comprising a third minor axis extending outwards from the container 102, wherein the third minor axis may be shorter than the first and second minor axes. The third minor axis may be equal in length compared to the first and second minor axes.

FIG. 2 illustrates a package similar to the one shown in fig 1 ; a protective element 218 may cover a second part 208 of a hollow body such that an end section of the second part 208 is prevented from being

contaminated. The protective element 218 may be attached to a container 202. The second part 208 may be indirectly secured to a second section 212 of the container 202 by the protective element 218, and/or directly secured to the second section 212 by an adhesive, such as glue. The protective element 218 may be perforated to facilitate removal from the second part 208. After removal from the second part 208, the protective element 218 may be retained by the container 202.

Referring now to FIG. 3a-3c, a package may be prepared for drinking by removing a protective element (not shown), releasing a second part 308 of a hollow body 304 releasably attached to a second section 312 of a container, and pushing a flexible portion 320 of at least one of a first piece and a second piece of the hollow body 304 such that a cutting member is indirectly pushed through a weakened portion of the container such that liquid held in the container can be transferred out from the container via the hollow body 304. By indirectly pushing the cutting member, contaminants may be prevented from entering the container.

Referring now to FIG. 4, a hollow body may comprise a first piece 422 and a second piece 424, wherein at least a portion of a periphery of the first piece 422 is attached to at least a portion of a periphery of the second piece 424, forming an attachment portion, in order to form the hollow body. The first piece 422 may comprise a flat bottom to provide for that a contact area between the first piece 422 and a first section and/or a second section of a container is maximized, thereby facilitating attachment of the first part to the first section and/or second section of the container. At least one of the first piece 422 and second piece 424 may comprise at least one spacing element 426 providing for that a flow channel inside the hollow body is open. The at least one spacing element 426 may extend along a longitudinal axis of the hollow body. At least one of the first piece 422 and the second piece 424 may comprise a crimped portion 428. At least one of the first piece 422 and the second piece 424 may comprise a cutting member 430 arranged at a weakened portion of a container such that a hole can be made in the container with the cutting member 430. At least one of the first piece 422 and the second piece 424 may comprise a flexible portion 420 aligned with the cutting member 430 such that when the flexible portion 420 is pushed towards the container the cutting member 430 is indirectly pushed through the weakened portion. Here, the first piece 422 comprises the cutting member 430, and the second piece 424 comprises the flexible portion 420. It is to be understood that any one of the first piece 422 and the second piece 424 may comprise the flexible portion 420 and/or the cutting member 430, as long as the flexible portion 420 is aligned with the cutting member 430 such that when the flexible portion 420 is pushed towards the container the cutting member 430 is indirectly pushed through the weakened portion. The cutting member 430 may be separate from the first piece 422 and the second piece 424. The weakened portion may be enclosed by part of a container side and at least one of the first piece 422 and the second piece 424, such that liquid held in the container can be transferred out from the container via the hollow body. At least one of the first piece 422 and the second piece 424 may be arranged to create a seal around the weakened portion, such that vent air is prevented from flowing into the container as liquid is dispensed through the hollow body, and such that fluid flow through the hollow body commences when a pressure differential is applied across the fluid outlet and an inner space of the container. As a result of the seal, a slight sub-atmospheric pressure may develop within the container during drinking from the container via the hollow body, such that liquid in the hollow body may be forced back into the container as soon as a consumer removes the hollow body from his or her mouth. The user may remove his or her mouth from the fluid outlet, allowing air to vent through the hollow body into the container such that any pressure differential within the container may be eliminated. Tipping or inverting the container may cause liquid held in the container to begin flowing through the hollow body as a result of a pressure applied by the weight of the liquid.

Liquid flowing through the hollow body as a result of a pressure applied by the weight of the liquid may be prevented from reaching the fluid outlet of the hollow body by choosing an appropriate length of the hollow body, such that a sufficient sub-atmospheric pressure may develop within the container, such that the pressure applied by the weight of the liquid may be overcome, such that the liquid may stop flowing through the hollow body.

Still referring to FIG. 4, the container may be ductile, and/or comprise flexible material and/or a particularly thin wall thickness, such that any substantial sub-atmospheric pressure within the container may tend to temporarily buckle the body wall of the container. The first piece 422 may comprise a first material, wherein the first material is a polymeric material, e.g. a thermoplastic, for example selected from the group consisting of polyethylene terephthalate (PET), polypropene (PP), polyethylene (PE), and polystyrene (PS). The second piece 424 may comprise a second material, wherein the second material is a polymeric material, e.g. a thermoplastic selected from the group consisting of PET, PP, PE, and PS. The first piece

422 may be harder and/or stiffer than the second piece 424. The first piece 422 and/or the second piece 424 may be transparent. The first piece 422 and/or the second piece 424 may be provided with a color. The transparency and/or color of the first piece 422 and/or the second piece 424 may be chosen such that a sufficiently high contrast between the liquid and the hollow body is obtained such that a liquid level of the hollow body can be determined by visual inspection. The possibility of providing different colors to the first piece and/or second piece, and/or having at least one of the first piece and second piece transparent, enables an increased level of customization of the package compared to today's packages.

In an alternative embodiment not depicted, a hollow body may comprise a first piece and a second piece, wherein the first piece comprises a cutting member and a flexible portion for indirectly pushing the cutting member through a weakened portion of a container, and wherein the second piece comprises an elongated tube. At least a portion of a periphery of the first piece may be attached to at least a portion of a periphery of the second piece, in order to form the hollow body.

Referring now to FIG. 5, a hollow body may comprise a first piece 522 and a second piece 524. At least one of the first piece 522 and the second piece 524 may comprise at least one spacing element 526. The at least one spacing element 526 may be in contact with at least one of the first piece 522 and the second piece 524. The at least one spacing element 526 may be of any geometrical shape such that a flow channel inside the hollow body is open, e.g. semi-elliptical, triangular, rectangular, circular, cylindrical.

Referring now to FIG. 6, a carton based container generally comprises several layers; an outer coating 632, a paper board layer 634, a lamination 636, an aluminum layer 638, a first internal coating 640, and a second internal coating 640. Here, a weakened portion 644 of the container is made by a cut through the paper board layer 634 and lamination 636. The weakened portion 644 may be provided by laser cutting.

Referring now to FIG. 7, a weakened portion 744 may be located on any side of a container. The weakened portion 744 may be located on a front section, a bottom section, or a side section of a container. The weakened portion 744 may comprise at least one cut of at least one of several layers forming a wall of a container. The weakened portion 744 may comprise several cuts of at least one of several layers forming a wall of a container, wherein the several cuts may overlap. The weakened portion 744 may be located in a lower half of the container when the container is in an upright position. The weakened portion 744 may be located such that a liquid level of a full container is above the weakened portion when the container is in an upright position. The weakened portion 744 may be located such that a liquid level of a container is above or in line with the weakened portion when the container is in an upright position. Referring now to FIG. 8, a reel of packaging material may comprise weakened portions 844 as shown in figures 6-7. The reel may be used in a filling machine to produce filled packages.

Referring now to FIGS. 9a-9c, a package may be opened by pushing a flexible portion 920 such that a cutting member is indirectly pushed through a weakened portion of a container. In a first step of an opening process, the flexible portion 920 may be pushed until contact with an upper part 948 of a cutting member. In a second step of an opening process, the flexible portion 920 may be pushed against the upper part 948 of the cutting member with enough force such that a cutting part 950 of the cutting member penetrates the weakened portion 920 of the container. The flexible portion 920 may be in the shape of a hemisphere. The flexible portion 920 may protrude in a direction substantially perpendicular to a longitudinal axis of the hollow body and/or in a direction substantially orthogonal to the first side to which the first part of the hollow body is attached. The flexible portion 920 may be encircled by a groove, such that flexing of the flexible portion is facilitated.

Referring now to FIG. 10, an alternative embodiment of a hollow body may comprise a first piece 1022 and a second piece 1024, wherein at least a portion of a periphery of the first piece 1022 is attached to at least a portion of a periphery of the second piece 1024, forming an attachment portion, in order to form the hollow body. The first piece 1022 may comprise a flat bottom to provide for that a contact area between the first piece 1022 and a first section and/or a second section of a container is maximized, thereby facilitating attachment of the first part to the first section and/or second section of the container. At least one of the first piece 1022 and second piece 1024 may comprise at least one spacing element 1026 providing for that a flow channel inside the hollow body is open. The at least one spacing element 1026 may extend along a longitudinal axis of the hollow body. Here, both the first piece 1022 and the second piece 1024 comprise spacing elements. At least one of the first piece 1022 and the second piece 1024 may comprise a crimped portion. At least one of the first piece 1022 and the second piece 1024 may comprise a cutting member 1030 arranged at a weakened portion of a container such that a hole can be made in the container with the cutting member 1030. It is to be understood that the hollow body depicted in FIG. 10 generally operates in a similar way to the hollow body described in FIG. 4 to provide a similar function. Further, the features of the hollow body depicted in FIG. 10 may be applied to the hollow body described in FIG. 4, and vice versa.

Referring now to FIGS. 1 1 a-1 1 d, different weakened portions are depicted in a top view. It is to be understood that the illustrations only serve to depict a general shape of the weakened portion, and may not be drawn to scale. The weakened portion may be in the shape of a bow. The weakened portion may be in the shape of a spiral. The weakened portion may be in the shape of a serpentine. The weakened portion may be in the shape of an open-ended circle.

Referring now to FIG. 12, an alternative embodiment of a cutting member 1230 is depicted in a top view. A first piece of a hollow body may comprise a ridge 1252. The ridge 1252 may enclose the cutting member 1230.

The invention has mainly been described above with reference to a few embodiments. However, as is readily appreciated by a person skilled in the art, other embodiments than the ones disclosed above are equally possible within the scope of the invention, as defined by the appended patent claims.

As an example, the package in the embodiment of FIG. 1 and/or FIGS. 3a-3c may comprise a protective element in accordance with the embodiment of FIG. 2, and/or a hollow body in accordance with the embodiments of FIG. 4, 5, 10, 12, or any combination thereof.

As another example, the hollow body in the embodiment of FIG. 4 and/or 5, may comprise a cutting member in accordance with the embodiment of FIGS. 9a-9c and/or FIG. 12.

As another example, the container in the embodiment of FIGS. 1 and/or 3a-3c may comprise a weakened portion in accordance with the embodiments of FIG. 6, 7, and FIGS. 1 1 a-1 1 d, or any combination thereof.

List of reference signs

100 Package

102 Container

104 Hollow body

06 First part

108 Second part

109 Third part

1 10 First section

1 12 Second section

1 14 Intersection point

1 16 Attachment portion

202 Container

208 Second part

212 Second section

218 Protective element

304 Hollow body

308 Second part

312 Second section

320 Flexible portion

420 Flexible portion

422 First piece

424 Second piece

426 Spacing element

427 Fluid outlet

428 Crimped portion

430 Cutting member

522 First piece

524 Second piece

526 Spacing element

632 Outer coating

634 Paper board layer

636 Lamination

638 Aluminum layer

640 First internal coating

642 Second internal coating

644 Weakened portion

744 Weakened portion 44 Weakened portion 46 Reel

20 Flexible portion 948 Upper part 950 Cutting part 1022 First piece 1024 Second piece 1026 Spacing element 1030 Cutting member 1230 Cutting member 1252 Ridge

Claims

1 . A packaging material comprising:

a number of container sections configured to be turned into containers for a liquid food product, each of said container sections comprising a front section, a bottom section, and at least one side section, wherein one of said front section, said bottom section, and said at least one side section comprises a weakened portion, said weakened portion being placed in a lower half of said container when said container is placed in an upright position.

2. The packaging material according to claim 1 , wherein said weakened portion is configured to interact with a hollow body comprising a cutting member and a flexible portion such that when said flexible portion is pushed towards said container said cutting member is indirectly pushed through said weakened portion, thereby forming a hole in said container, such that liquid held in said container can be transferred out from said container through said hole into said hollow body.

3. The packaging material according to claim 2, further comprising a mark in order to facilitate alignment of said weakened portion and said cutting member.

4. The packaging material according to any one of the preceding claims, wherein each of said container sections comprises a top section, four side sections, and a bottom section, said weakened portion being placed in one of said side sections, said weakened portion being closer to said bottom section than said top section.

5. The packaging material according to any one claims 1 to 4, further comprising at least one paper board layer and at least one outer coating, wherein said at least one paper board layer is removed in said weakened portion.

6. The packaging material according to any one claims 1 to 4, further comprising at least one paper board layer and at least one outer coating, wherein said at least one paper board layer and at least one outer coating is removed in said weakened portion.

7. The packaging material according to any one claims 1 to 4, further comprising at least one paper board layer and at least one outer coating, wherein said weakened portion comprises at least one cut of said at least one paper board layer.

8. The packaging material according to any one claims 1 to 4, further comprising at least one paper board layer and at least one outer coating, wherein said weakened portion comprises at least one cut of said at least one paper board layer and said at least one outer coating.

9. A method for producing a container filled with liquid food product, said method comprising:

forming said container from a packaging material according to claims 1 to 8;

filling said container with liquid food product; and

attaching a hollow body to said container such that a cutting member of said hollow body is aligned with a weakened portion of said packaging material.

10. A container for liquid food product produced according to claim 9.