Packaging material and squeeze up packaging for an ice pop portion

Abstract

The invention relates to a paper-based, metal-free and metal oxide-free packaging material (4) for frozen food packaging with a paper content of at least 85% by weight and a basis weight of between 150 g / m2 and 250 g / m2, comprising a paper layer (9) and at least one water vapor barrier layer (10a, 10b), wherein the water vapor transmission rate WVTR at -18°C and 80% relative humidity is less than 2 g / m2d. A further aspect of the invention is asqueeze up packaging for an ice pop portion with a tube (2) closed at a first end (3) and being formed said the packaging material (4).

Description

[0001] a n d r e j e w s k i • h o n k e

[0002] Patent- u nd Rec htsa nwa lte

[0003] PCT Patent Application 8 October 2024

[0004] Mondi AG (X 26 072 / Ri / Lz)

[0005] Packaging material and squeeze up packaging for an ice pop portion

[0006] Description:

[0007] The present invention relates to a paper based material for frozen food packaging.

[0008] According to a preferred embodiment the packaging material is provided as ice cream packaging for an ice cream portion, wherein an inner side of the packaging is directly adjacent to the ice cream portion. The packaging material may especially form a tube closed at a first end. A Squeeze up packaging for an ice pop portion is than formed by the tube containing the ice portion and usually a removable lit at a second end of the tube.

[0009] According to specific national food definition the term ice cream only refers to frozen desserts containing milk and / or cream. In contrast to that term ice cream is to be understood in a broad manner within the scope of the present invention and also refers to flavored water ice, frozen juice, slush ice, frozen smoothies, and any frozen mixtures.

[0010] Considering this definition ice cream is frequently provided as water ice on one hand or milk ice on the other hand, wherein the ice cream portion can be provided with or without a stick. Referring to ices on a stick the packaging is usually provided as a pouch, wherein an inner surface of the pouch may be in a direct contact to the ice cream portion

[0011] Water ice without a stick can be provided in squeeze-up-tubes, wherein the water ice or any other ice portion can be frozen inside said tube providing the shape of the ice cream portion. Known squeeze-up-tubes usually comprise a paper layer, especially in the form of cardboard, wherein thermoplastic polyethylene is a n d r e j e w s k i • h o n k e

[0012] Patent- u nd Rec htsa nwa lte

[0013] PCT Patent Application 8 October 2024

[0014] Mondi AG (X 26 072 / Ri / Lz)

[0015] 2 provided on both sides. For known squeeze-up-tubes the content of the paper is about 80% by weight with the residue polyethylene. Accordingly still a significant amount of polymer is needed, wherein the composite material of paper and thermoplastic polyethylene is difficult to recycle.

[0016] In practice further packaging material for frozen food packages are known. For example bags or boxes can be provided for frozen food.

[0017] Considering the above-mentioned ice cream packages and other packages for specific frozen food the water vapor transmission is an issue even in the frozen stage with temperatures below 0°C.

[0018] According to AT 526 063 B1 a method for determining the water vapor permeability below 0°C is provided. This method takes into account that a measurement of water vapor permeability at room temperature according to the known standards (e. g. ISO 2528:2017) cannot be reliably transferred to conditions below 0°C by extrapolation or even only qualitatively.

[0019] It is an aim of the present invention to provide a paper based packaging material for frozen food packaging which is allowing a better recyclability and a good protection of the frozen foods, especially in the form of ice cream portions.

[0020] The subject of the invention and the solution of the problem are a paper-based packaging material according to claim 1 and a squeeze up packaging according to claim 13.

[0021] Thus the invention is directed to a paper-based, metal-free and metal oxide-free packaging material for frozen food packaging with a paper content of at least 85% by weight and a basis weight of between 150 g / m2and 250 g / m2, comprising a a n d r e j e w s k i • h o n k e

[0022] Patent- u nd Rec htsa nwa lte

[0023] PCT Patent Application 8 October 2024

[0024] Mondi AG (X 26 072 / Ri / Lz)

[0025] 3 paper layer and at least one water vapor barrier layer, wherein the water vapor transmission rate WVTR at -18°C and 80% relative humidity is less than 2 g / m2d (grams per square meter and day).

[0026] The vapor transmission rate WVTR is determined according to the method disclosed in AT 526 063 B1 .

[0027] Subject of the invention is in addition a squeeze up packaging for an ice pop portion with a tube closed at a first end and being formed by the above mentioned packaging material.

[0028] According to the present invention the paper-based packaging material is free of metal and metal oxide. Thus the packaging material is comparable easy to produce and to recycle. In addition the packaging material comprises a moderate basis weight between 150 g / m2and 250 g / m2, preferably between 180 g / m2and 220 g / m2, allowing the formation of tubes and other packaging containers by rolling and / or folding and / or sealing. In contrast to simple wrapping paper or flexible bags, the packaging material is stiff and strong enough to maintain a predetermined packaging shape, for example in the form of a tube or possibly a box.

[0029] The packaging material used for the squeeze-up packaging retains the shape of the tube even when the ice pop melts and / or softens, either partially or completely. At the same time, the squeeze-up packaging is so flexible that the tube can be squeezed and pushed to push the ice pop out of the second open end.

[0030] The squeeze up packaging must be impervious to liquids even if a portion of the ice pop melts or if the ice pop is provided in liquid form and freezes during the a n d r e j e w s k i • h o n k e

[0031] Patent- u nd Rec htsa nwa lte

[0032] PCT Patent Application 8 October 2024 Mondi AG (X 26 072 / Ri / Lz) manufacturing process.

[0033] With a suitable paper layer the packaging material is stiff enough to be transported, cut, folded and further processed on a suitable packaging machine.

[0034] The packaging material comprises paper as main component with a content of at least 85% by weight. According to the high content of paper the packaging material can be recycled in known paper recycling processes. As the packaging material is metal free and metal oxide free the remaining residuals can be separated from the paper fibres in the recycling process comparably easy.

[0035] The packaging material is preferably recyclable according to the specifications of the 4evergreen alliance (htps: / / 4evergreenforum.eu / , as defined in August 2024) for paper recycling allowing a residual content of polyethylene.

[0036] According to a preferred embodiment of the invention the content of papers is at least 88% by weight, most between 89% by weight and 94% by weight. Considering these values recycling is further enhanced and the separation of residual material is simplified, whereas on the other hand sufficient barrier properties can still be achieved.

[0037] According to the invention the packaging material comprises a paper layer and at least one water vapor barrier layer. In principle the above-mentioned content of paper might be provided in two or more paper layers. According to a preferred embodiment of the invention the packaging material comprises a single paper layer.

[0038] The claimed content of paper is not necessarily equal to the content of paper fibers only. The provided paper may for example be coated, especially clay a n d r e j e w s k i • h o n k e

[0039] Patent- u nd Rec htsa nwa lte

[0040] PCT Patent Application 8 October 2024

[0041] Mondi AG (X 26 072 / Ri / Lz)

[0042] 5 coated, wherein such a known coating is considered as component of the paper. Nevertheless further separate layers going beyond the usual paper coating of coated papers are not considered as component of the paper itself. For example layers of polyethylene or other polymers, layers of metal or metal-oxide or other non-paper materials are not considered as component of the paper itself.

[0043] According to the invention the water vapor transmission rate WVTR at -18°C and 80% relative humidity is less than 2 g / m2d (grams per cubic meter and day). Accordingly the metal-free and metal oxide-free packaging material comprises a low permeability for water vapor and allows a reliable storage of frozen food, especially ice cream portions.

[0044] Nevertheless the packaging material might be also used for other frozen products and especially frozen food. With regard to frozen food, the use of the packaging material according to the invention is particularly useful if the food is sensitive with regard to water content and / or ice formation or if the quality impression resulting for a user can be impaired. Possible dishes include spring rolls, pizza, breaded products such as nuggets or schnitzel and the like.

[0045] According to a preferred embodiment of the invention the water vapor transmission rate WVTR at -18°C and 80% relative humidity is between 0.8 g / m2d and 1 .5 g / m2d. A water vapor transmission rate below the given range is usually combined with enhanced effort and usually not necessary to store ice cream portions or other food products which are also mentioned above as examples.

[0046] The claimed low water vapor transmission rate at a moderate basic weight of the packaging material can be achieved by a suitable selection of the paper layer and the at least one water vapor barrier layer respectively. According to the present invention the relevant criteria are defined to provide an enhanced metal-free and a n d r e j e w s k i • h o n k e

[0047] Patent- u nd Rec htsa nwa lte

[0048] PCT Patent Application 8 October 2024

[0049] Mondi AG (X 26 072 / Ri / Lz)

[0050] 6 metal oxide-free packaging material for frozen food packaging allowing a reliable storage over a comparable long period of time.

[0051] As an example the paper layer may be provided without pores and / or with at least two different sublayers which may enhance the water vapor transmission rate and / or the mechanical properties.

[0052] As an example the paper layer can be provided with three sublayer forming a top sublayer, a middle sublayer and a back sublayer, wherein the top sublayer and the back sublayer may essentially or completely consist of sulphate pulp and wherein the middle sublayer may essentially or completely consist of a mixture of sulphate pulp and chemi-thermomechanical pulp (CTMP). Considering the preferred use in a food contact especially virgin fibers are suitable for the paper layer which may also be bleached.

[0053] To choose a suitable paper layer the water vapor transmission rate of the paper layer itself may be considered at room temperature. According to preferred embodiment of the invention the paper layer has a water vapor transmission rate WVTR at 23°C and 50 % relative humidity of less than 50 g / m2d. The water vapor transmission rate at room temperature can be determined according to the standard ISO 2528:2017.

[0054] For the at least one water vapor barrier layer various materials can be considered.

[0055] According to a first variant of the invention the at least one water vapor barrier layer having a basis weight of between 5 g / m2and 25 g / m2is formed on the basis of polyethylene including polyethylene copolymer and polyethylene blends. Such a water vapor barrier layer can thermoplastically coated on the paper layer, especially by extrusion coating. a n d r e j e w s k i • h o n k e

[0056] Patent- u nd Rec htsa nwa lte

[0057] PCT Patent Application 8 October 2024 Mondi AG (X 26 072 / Ri / Lz)

[0058] The term polyethylene copolymer is used in the scope of the invention as a generic term to refer to various copolymer types in particular, which can be used without restriction on their own or in a blend with at least one other polyethylene copolymer or polyethylene homopolymer.

[0059] In case that only one water vapor barrier layer based on polyethylene is provided by extrusion coating, this water vapor barrier layer may comprise a basis weight between 10 g / m2and 25 g / m2, especially between 12 g / m2and 18 g / m2. The packaging material comprising only one water vapor barrier layer based on polyethylene and provided by extrusion coating is preferably formed to a packaging and especially the above mentioned squeeze up packaging in such a manner that the only one water vapor barrier layer based on polyethylene and provided by extrusion coating is on an inside of the packaging to allow an sufficient protection of the paper layer against liquids of the contained product even it is molten. In addition the only one water vapor barrier layer based on polyethylene and provided by extrusion coating can then also be used to form the packaging by heat sealing.

[0060] Although a single water vapor barrier layer can be sufficient to achieve the claimed range of the water vapor transmission rate embodiments comprising several water vapor barrier layers are also covered by the scope of the invention. For example the water vapor barrier layer might be provided on each side of the paper layer.

[0061] As an example only the above mentioned one water vapor barrier layer based on polyethylene and provided by extrusion coating can be combined with a further barrier layer, which is especially provided on the opposite side of the paper layer. a n d r e j e w s k i • h o n k e

[0062] Patent- u nd Rec htsa nwa lte

[0063] PCT Patent Application 8 October 2024

[0064] Mondi AG (X 26 072 / Ri / Lz)

[0065] 8

[0066] As an example a further barrier and / or heat-seal layer is formed from an aqueous coating. Most preferred is a material which is as a layer of the packaging material heat-sealable and which comprises certain barrier properties. Suitable products are provided by the company Paramelt under the tradename Aquaseal. As an example an aqueous ethylene copolymer dispersion may be provide. Such a barrier and / or heat-seal layer may comprise a basis weight between 0.5 g / m2and 5 g / m2, especially between 1 g / m2and 3 g / m2, preferred about 2 g / m2.

[0067] As an example the packaging material may comprise exactly one water vapor barrier layer, especially having a basis weight of between 10 g / m2and 25 g / m2, which is formed on the basis of polyethylene including polyethylene copolymer and polyethylene blends. A barrier and heat-seal material, especially formed from an aqueous coating, may be provided on a side of the paper layer opposite the one water vapor barrier layer. When the barrier and heat-seal material is provided as a complete layer barrier properties as well as heat-seal properties are achieved. As an alternative the barrier and heat-seal material may be applied only partially to allow a sealing of the packaging material in combination with the single water vapor barrier layer on the opposite side of the paper layer. As an example the barrier and heat-seal material may be provided in stripes.

[0068] According to an alternative embodiment of the invention packaging material comprises exactly two water vapor barrier layers provided on opposite sides of the paper layer, wherein both are formed on the basis of polyethylene including polyethylene copolymer and polyethylene blends and have a basis weight of between 5 g / m2and 15 g / m2, preferably between 7 g / m2and 12 g / m2each. Both water vapor barrier layers can be thermoplastically coated on the paper layer, especially by extrusion coating.

[0069] As polyethylene based material for the at least on water vapor barrier layer a n d r e j e w s k i • h o n k e

[0070] Patent- u nd Rec htsa nwa lte

[0071] PCT Patent Application 8 October 2024

[0072] Mondi AG (X 26 072 / Ri / Lz)

[0073] 9 provided thermoplastically, LDPE (low-density polyethylene) and LLDPE (linear low-density polyethylene) are suitable, wherein especially a blend of LDPE and LLDPE is preferred.

[0074] The packaging material is usually printed on the side of the packaging material forming the outside of the final packaging, especially the above mentioned squeeze up packaging for an ice pop portion. The imprint usually contains a graphic design and / or consumer information. The imprint can be provided directly on the paper layer or a further layer. According to a preferred embodiment the imprint is covered on the outside of the packaging by at least on layer, for example by an optional overprint lacquer, especially a water-based overprint lacquer. Suitable overprint lacquers are provided by the company Sun Chemical under the tradename SunCoat. The imprint may comprise a basis weight between 0.5 g / m2and 3 g / m2, especially between 1 g / m2and 2 g / m2. The overprint lacquer may comprise a basis weight <2 g / m2, preferably <1 g / m2, for example between 0.2 g / m2and 1 g / m2.

[0075] The invention is explained below with reference to exemplary drawings:

[0076] Fig.1 : a squeeze up packaging with an ice pop portion;

[0077] Fig. 2: a packaging material for the queeze up packaging;

[0078] Fig. 3 and 4: alternative embodiment of the packaging material,

[0079] Fig. 5 a top view on a packaging material according to Fig. 4.

[0080] Fig. 1 shows a squeeze up packaging 1 with an ice pop portion inside. The squeeze up packaging 1 comprises a tube 2 closed at a first end 3 and being a n d r e j e w s k i • h o n k e

[0081] Patent- u nd Rec htsa nwa lte

[0082] PCT Patent Application 8 October 2024

[0083] Mondi AG (X 26 072 / Ri / Lz)

[0084] 10 formed by a packaging material 4. At a second end 5 the tube 2 is closed by a removable lid 6. To form the tube 2 a sheet of the packaging material 4 is rolled and heat-sealed to itself at a longitudinal sealing seam 7. The first end 3 is closed by and end sealing seam 8.

[0085] Fig. 2 shows an embodiment of the paper-based, metal-free and metal oxide-free packaging material 4 comprising a paper content of at least 85% by weight and a basis weight of between 150 g / m2and 250 g / m2Main component of the packaging material 4 is a paper layer 9 comprising a three-layered substructure with a top sublayer 9a, a middle sublayer 9b and a back sublayer 9c. The top sublayer 9a and the back sublayer 9c consist of sulphate pulp, wherein the middle sublayer 9b consist of a mixture sulphate pulp and chemi-thermomechanical pulp (CTMP). The complete paper layer 9 consists of virgin fibers and is bleached.

[0086] Two water vapor barrier layers 10a, 10b are provided on opposite sides of the paper layer 9, wherein both are formed on the basis of polyethylene including polyethylene copolymer and polyethylene blends and have a basis weight of between 5 g / m2and 15 g / m2each.

[0087] One of the water vapor barrier layers 10a forms a first surface of the packaging material 4 which is provided as inner side of the squeeze up packaging 1 shown in Fig. 1 .

[0088] The other water vapor barrier layers 10b is printed with an imprint 11 (see also Fig. 1 ) containing a graphic design and consumer information.

[0089] Finally an overprint lacquer 12 protecting the imprint 11 is provided at a second surface of the packaging material 4 forming the outer side of the squeeze up packaging 1 . Typically the imprint 11 comprises a basis weight between 0.5 g / m2 a n d r e j e w s k i • h o n k e

[0090] Patent- u nd Rec htsa nwa lte

[0091] PCT Patent Application 8 October 2024

[0092] Mondi AG (X 26 072 / Ri / Lz)

[0093] 11 and 3 g / m2, especially between 1 g / m2and 2 g / m2. The overprint lacquer 12 may comprise a basis weight <2 g / m2, preferably <1 g / m2, for example between 0.2 g / m2and 1 g / m2.

[0094] According to a first specific embodiment of the packaging material 4 shown in Fig. 2 the material for the paper layer 9 is paper provided with a basis weight of 184 g / m2by the company Stora Enso under the trademark Cupforma Nature. Both water vapor barrier layers 10a, 10b are provided with a basis weight of 9 g / m2and consist of a blend of the polyethylene polymers CA8200 provided by the Borealis AG and ELITE 5811 provided by the DOW Chemical Company. On the imprint 11 comprising a basis weight about 1 -2 g / m2SUNCOAT 2012 provided by Sun Chemicals as overprint lacquer 12 with a basis weight <1 g / m2forms the second surface of the packaging material 4. Due to the low layer thickness of the imprint 11 and the overprint lacquer 12 the two water vapor barrier layers 10a, 10b can be heat sealed at the longitudinal sealing seam 7 when the packaging material 4 is rolled and formed to the tube 2 during production.

[0095] Fig. 3 shows an alternative embodiment of the paper-based, metal-free and metal oxide-free packaging material 4 comprising a paper content of at least 85% by weight and a basis weight of between 150 g / m2and 250 g / m2wherein the same paper layer 9 as in Fig. 2 is used as main component.

[0096] One water vapor barrier layers 10a on the basis of polyethylene including polyethylene copolymer and polyethylene blends and having a basis weight between 10 g / m2and 25 g / m2is provided on one side of the paper layer 9.

[0097] Said water vapor barrier layer 10a forms a first surface of the packaging material

[0098] 4 which is provided as inner side of the squeeze up packaging 1 shown in Fig. 1 . a n d r e j e w s k i • h o n k e

[0099] Patent- u nd Rec htsa nwa lte

[0100] PCT Patent Application 8 October 2024 Mondi AG (X 26 072 / Ri / Lz)

[0101] 12

[0102] The opposite side of the paper layer 9 is directly printed with the imprint 11 .

[0103] A barrier and heat-seal layer 13 is formed from an aqueous coating on the imprint 11. To form the barrier and heat-seal layer 13 an aqueous ethylene copolymer dispersion is provided. The solidified barrier and heat-seal layer 13 comprises a basis weight between 0.5 g / m2and 5 g / m2, especially between 1 g / m2 and 3 g / m2, preferred about 2 g / m2.

[0104] Finally an overprint lacquer 12 protecting the barrier and heat-seal layer 13 and the imprint 11 is provided at a second surface of the packaging material 4 forming the outer side of the squeeze up packaging 1 . Typically the imprint 11 comprises a basis weight between 0.5 g / m2and 3 g / m2, especially between 1 g / m2and 2 g / m2. The overprint lacquer 12 may comprise a basis weight <2 g / m2, preferably <1 g / m2, for example between 0.2 g / m2and 1 g / m2.

[0105] According to a second specific embodiment of the packaging material 4 shown in Fig. 3 the material for the paper layer 9 is paper provided with a basis weight of 184 g / m2by the company Stora Enso under the trademark Cupforma Nature. The water vapor barrier layer 10a is provided with a basis weight of 15 g / m2and consist of a blend of the polyethylene polymers CA8200 provided by the Borealis AG and ELITE 5811 provided by the DOW Chemical Company. The imprint 11 comprising a basis weight about 1 -2 g / m2is directly printed on the opposite side of the paper layer 9. The imprint 11 is covered by Aquaseal X 2221 provided by the company Paramelt as an aqueous dispersion to form the barrier and heatseal layer 13. The solidified barrier and heat-seal layer 13 comprises a basis weight of about 2 g / m2.

[0106] SUNCOAT 2012 provided by Sun Chemicals as overprint lacquer 12 with a basis a n d r e j e w s k i • h o n k e

[0107] Patent- u nd Rec htsa nwa lte

[0108] PCT Patent Application 8 October 2024

[0109] Mondi AG (X 26 072 / Ri / Lz)

[0110] 13 weight <1 g / m2forms the second surface of the packaging material 4. The barrier and heat-seal layer 13 and the water vapor barrier layer 10a are heat sealed at the longitudinal sealing seam 7 when the packaging material 4 is rolled and formed to the tube 2 during production.

[0111] Fig. 4 shows a further alternative embodiment of the paper-based, metal-free and metal oxide-free packaging material 4 comprising a paper content of at least 85% by weight and a basis weight of between 150 g / m2and 250 g / m2wherein the same paper layer 9 as in Fig. 2 and Fig. 3 is used as main component.

[0112] One water vapor barrier layers 10a on the basis of polyethylene including polyethylene copolymer and polyethylene blends and having a basis weight between 10 g / m2and 25 g / m2is provided on one side of the paper layer 9.

[0113] Said water vapor barrier layer 10a forms a first surface of the packaging material 4 which is provides as inner side of the squeeze up packaging 1 shown in Fig. 1 .

[0114] On the opposite side of the paper layer 9 is directly printed with the imprint 11 , wherein the surface at this opposite side comprises different sections.

[0115] A barrier and heat-seal material formed from an aqueous coating is provided in stripes 14 on the imprint 11. To form the stripes 14 an aqueous ethylene copolymer dispersion is provided. The solidified barrier and heat-seal material comprises a basis weight between 0.5 g / m2and 5 g / m2, especially between 1 g / m2 and 3 g / m2, preferred about 2 g / m2. These values refer to the area covered by the strips 14 and not to the total area of the packaging material 4.

[0116] An overprint lacquer 12 is provided between the stripes 14. Typically the imprint 11 comprises a basis weight between 0.5 g / m2and 3 g / m2, especially between 1 a n d r e j e w s k i • h o n k e

[0117] Patent- u nd Rec htsa nwa lte

[0118] PCT Patent Application 8 October 2024

[0119] Mondi AG (X 26 072 / Ri / Lz)

[0120] 14 g / m2and 2 g / m2. The overprint lacquer 12 may comprise a basis weight <2 g / m2, preferably <1 g / m2, for example between 0.2 g / m2and 1 g / m2. These values refer to the area covered by the overprint lacquer 12 and not to the total area of the packaging material 4.

[0121] Considering a side by side configuration the overprint lacquer 12 and the stripes 14 can be applied in any order, either one after the other or at the same time. In principle the areas of the stripes 14 and the overprint lacquer 12 may overlap at the edges. As an alternative the overprint lacquer 12 may also be provided as full layer blow or above the stripes 14. As shown in Fig. 2 a sealing of the barrier and heat-seal material is also possible thought the overprint lacquer 12 which may be, without limitation, displaced and / or removed and / or distributed in the heat- sealable material during the sealing process.

[0122] According to a third specific embodiment of the packaging material 4 shown in Fig. 4 the material for the paper layer 9 is paper provided with a basis weight of 184 g / m2by the company Stora Enso under the trademark Cupforma Nature. The water vapor barrier layer 10a is provided with a basis weight of 12 g / m2and consist of a blend of the polyethylene polymers CA8200 provided by the Borealis AG and ELITE 5811 provided by the DOW Chemical Company. The imprint 11 comprising a basis weight about 1 -2 g / m2is directly printed on the opposite side of the paper layer 9. The imprint 11 is partially covered by Aquaseal X 2221 provided by the company Paramelt as an aqueous dispersion to form the stripes 14 of barrier and heat-seal material. The solidified stripes 14 comprises a basis weight of about 2 g / m2.

[0123] SUNCOAT 2012 provided by Sun Chemicals as overprint lacquer 12 with a basis weight <1 g / m2covers the second surface of the packaging material 4 between the stripes 14. a n d r e j e w s k i • h o n k e

[0124] Patent- u nd Rec htsa nwa lte

[0125] PCT Patent Application 8 October 2024 Mondi AG (X 26 072 / Ri / Lz)

[0126] 15

[0127] Fig. 5 shows a section of the packaging material 4, with the stripes 14 running in a longitudinal direction. The stripes 14 are arranged with a suitable width so that, after the packaging material 4 has been cut and rolled in a pattern-accurate manner, they can form the sealing seam 7 shown in Fig. 1 together with the water vapor barrier layer 10a.

[0128] In terms of recycling, the third embodiment has a comparatively high paper content of around 93% by weight. It is also advantageous that there is a closed barrier on only one side of the paper layer 9, so that when it is crushed and soaked, water can reach the paper layer 9 itself more quickly.

[0129] The packaging material 4 according to the three specific embodiments comprises a water vapor transmission rate WVTR at -18°C and 80% relative humidity of less than 2 g / m2d. Accordingly the squeeze up packaging 1 with the ice pop portion inside can be stored over a comparable long time without any deterioration of the ice pop portion.

Claims

a n d r e j e w s k i • h o n k ePatent- u nd Rec htsa nwa ltePCT Patent Application 8 October 2024Mondi AG (X 26 072 / Ri / Lz)Claims1. Paper-based, metal-free and metal oxide-free packaging material (4) for frozen food packaging with a paper content of at least 85% by weight and a basis weight of between 150 g / m2and 250 g / m2, comprising a paper layer (9) and at least one water vapor barrier layer (10a, 10b), wherein the water vapor transmission rate WVTR at -18°C and 80% relative humidity is less than 2 g / m2d.

2. Packaging material (4) according to claim 1 , wherein the water vapor transmission rate WVTR at -18°C and 80% relative humidity is between 0.2 g / m2d and 1 .5 g / m2d.

3. Packaging material (4) according to claim 1 or 2, wherein the paper layer (6) has a basis weight of between 160 g / m2and 200 g / m2.

4. Packaging material (4) according to any one of claims 1 to 3, wherein the paper layer (9) has a water vapor transmission rate WVTR at 23°C and 50% relative humidity of less than 50 g / m2d.

5. Packaging material (4) according to any one of claims 1 to 4, wherein the at least one water vapor barrier layer (10a, 10b) having a basis weight of between 5 g / m2and 25 g / m2is formed on the basis of polyethylene including polyethylene copolymer and polyethylene blends.

6. Packaging material (4) according to one of claims 1 to 5, wherein several water vapor barrier layers (10a, 10b) are provided.

7. Packaging material (4) according to claim 5 and claim 6, wherein exactly two water vapor barrier layers (10a, 10b) are provided on opposite sides of the paper layer (9), wherein both are formed on the basis of polyethylenea n d r e j e w s k i • h o n k ePatent- u nd Rec htsa nwa ltePCT Patent Application 8 October 2024 Mondi AG (X 26 072 / Ri / Lz)including polyethylene copolymer and polyethylene blends and have a basis weight of between 5 g / m2and 15 g / m2each.

8. Packaging material (4) according to any one of the claims 1 to 5, wherein exactly one water vapor barrier layer (10a) having a basis weight of between 10 g / m2and 25 g / m2is formed on the basis of polyethylene including polyethylene copolymer and polyethylene blends, wherein preferably a barrier and heat-seal material formed from an aqueous coating is provided on a side of the paper layer opposite the one water vapor barrier layer (10a).

9. Packaging material (4) according to any one of the claims 1 to 8, wherein the paper content is at least 88% by weight.

10. Packaging material (4) according to claim 9, wherein the paper content is between 89% by weight and 94% by weight.11 . Packaging material (4) according to any one of the claims 1 to 10, wherein the paper layer (9) comprises at least two sublayer.

12. Packaging material (4) according to any one of the claims 1 to 11 , wherein one surface intended to be an outer side of a packaging is formed at least partially of an overprint lacquer (12).

13. Squeeze up packaging for an ice pop portion with a tube (2) closed at a first end (3) and being formed by a packaging material (4) according to one of the claims 1 to 12.

14. Squeeze up packaging according to claim 13, wherein the tube (2) is closed by a removable lid (6) at a second end (5).andrejewski • honkePatent- und RechtsanwaltePCT Patent Application 8 October 2024 Mondi AG (X 26072 / Ri / Lz)15. Squeeze up packaging according to claim 13 and 14, wherein the tube (2) comprises a longitudinal sealing seam (7) and / or is closed at the first end (3) by an end sealing seam (8).

Images