Packaging unit comprising a hygienic article

Abstract

A packaging unit comprising: an absorbent hygienic article, a sheet of wrapping material, a first layer of sealing material and a second layer of releasing material. The first layer is applied on a first surface covering at least a portion of the four edges of the sheet of wrapping material, free of the second layer. Whether the layers overlap is based on whether the sheet has an uncoated portion. With the proviso an inner side of the sheet lacks the uncoated portion, the second layer at least partially overlaps the first. With the proviso the inner side of the sheet has the uncoated portion, the overlap is not required, the uncoated portion is located on at least two opposing edges of the sheet, and surrounded on both sides of the edges by the first layer. The first layer is at least partially adjacent to the second layer in non-overlapping portions.

Description

[0001] PACKAGING UNIT COMPRISING A HYGIENIC ARTICLE

[0002] Technical field

[0003] The present application relates to a packaging unit comprising a hygienic article.

[0004] Disposable hygienic articles, such as sanitary napkins and panty liners, can be individually packaged in a wrapper of thin plastic film material. Individual packages enable hygienic carrying of the disposable hygienic articles for example in a bag or pocket. The packaging may be used both as a means for protecting an unused article against contamination and as a means for disposal of a used article. It is desirable that used disposable hygienic articles can be disposed of discretely and hygienically, especially when the user may lack the possibility to discard the used article immediately after the used article has been replaced. The packaging may be usually folded in a two-fold and sealed along the edges to protect the article before use, that is, to keep it hygienic before use. The packaging may also function to protect an adhesive layer which may be necessary to affix the article to a garment. The adhesive layer may be applied on the garment side of the disposable hygienic article.

[0005] WO 2017 / 065661 A1 discloses a packaging unit comprising a sheet of packaging material and a disposable hygienic article.

[0006] Hygienic articles create challenges in management of waste after use. Even though there are prior art solutions for individual packages for disposable hygienic articles, there is still a need for a packaging that can be used both for packaging a new hygienic article and for hygienic keeping and discarding of the used hygienic article, and that can protect an adhesive layer of the hygiene article while addressing the waste management challenges.

[0007] Summary of the invention

[0008] It is an object of the present invention to provide a solution to the above- mentioned need.

[0009] This object, as well as other objects being apparent to a skilled person studying the present description, may be achieved by a packaging unit comprising an absorbent hygienic article, and a sheet of wrapping material comprising natural fibers. The sheet has two first longitudinal edges, two first transversal edges, an inner side and an outer side. The packaging unit also comprises a first layer of sealing material to seal the packaging unit. The first layer is applied on a first surface of the inner side of the sheet of wrapping material. The packaging unit further comprises a second layer of releasing material to releasably attach the absorbent hygienic article to the sheet of wrapping material. The second layer is arranged onto a second surface of the inner side of the sheet of wrapping material. The second surface is smaller than the inner side of the sheet of wrapping material, is arranged in a central portion of the inner side of the sheet of wrapping material. The first surface covers at least a portion of the four first edges of the sheet of wrapping material. In at least the portion of the four first edges, the first surface is free of the second layer. Whether or not the second layer and the first layer at least partially overlap is subject to a proviso. The proviso is based on whether or not the sheet of wrapping material has an uncoated portion. The proviso is one of the following. With the proviso the inner side of the sheet of wrapping material lacks the uncoated portion, the second layer at least partially overlaps the first layer. With the proviso the inner side of the sheet of wrapping material has the uncoated portion, the at least partial overlap is not required, the uncoated portion is located on at least two opposing edges of the sheet of wrapping material, and surrounded on both sides of the edges by the first layer, and the first layer is at least partially adjacent to the second layer in non-overlapping portions.

[0010] It has thus been found that the packaging unit as disclosed herein provides a sustainable solution to the above-mentioned needs, which may be manufactured more effectively.

[0011] By the packaging unit enabling that the second layer and the first layer at least partially overlap, the packaging unit may be manufactured more easily, as less precision may be required to apply the first and second layers onto the inner side of the sheet of wrapping material.

[0012] By the packaging unit enabling that the second layer and the first layer at least partially overlap subject to the proviso based on whether or not the sheet of wrapping material has an uncoated portion, the packaging unit as disclosed herein may be manufactured more effectively while allowing flexibility in its design so that different advantages in manufacturing simplicity and material savings may be conveniently balanced.

[0013] By the packaging unit enabling that the second layer and the first layer at least partially overlapping with the proviso the inner side of the sheet of wrapping material lacks the uncoated portion, the packaging unit may be manufactured more easily, as less precision may be required to apply the first and second layers onto the inner side of the sheet of wrapping material. The first layer may be applied to cover the whole inner side of the sheet of wrapping material, for example, and the second layer may be applied on top, which may be understood to simplify the manufacturing and design of the product.

[0014] By the packaging unit, with the proviso the inner side of the sheet of wrapping material has the uncoated portion, having the uncoated portion located on at least two opposing edges of the sheet of wrapping material, and surrounded on both sides of the edges by the first layer and not requiring the at least partial overlap, the packaging unit may be manufactured more sustainably and with lower cost, as less material, e.g., sealing material, may be required to manufacture the product, while still achieving strong sealing of the packaging unit by having the first layer being at least partially adjacent to the second layer in the non-overlapping portions.

[0015] Moreover, by the packaging unit comprising the sheet of wrapping material comprising the natural fibers, the packaging unit provides a sustainable solution to the above-mentioned needs.

[0016] Furthermore, by the packaging unit comprising the first layer of sealing material applied in the first surface covering at least the portion of the four first edges of the sheet of wrapping material and being free of the second layer, the packaging unit is provided in a manner that is easily sealable.

[0017] The absorbent hygienic article may be a sanitary napkin, incontinence protector or panty liner. The absorbent hygienic article may be disposable. Any absorbent hygienic article may be used in the packaging unit disclosed herein.

[0018] The natural fibers may originate from wood, non-wood plant material, and combinations thereof. The natural fibers may be natural cellulosic fibers, preferably wood fibers, wheat straw fibers or bamboo fibers, more preferably wood fibers.

[0019] The wood fibers or wood pulp may originate from hardwood or softwood, including birch, beech, aspen such as European aspen, alder, eucalyptus, maple, acacia, mixed tropical hardwood, pine such as loblolly pine, fir, hemlock, larch, spruce such as Black spruce or Norway spruce, and mixtures thereof. Suitably fibers or pulp originating from eucalyptus or pine is used.

[0020] Non-wood plant material, such as seed hair fibers, leaf fibers, bast fibers, plant fibers can be provided from e.g. straws of grain crops, wheat straw, reed canary grass, sabai grass, straw, reeds, flax, hemp, kenaf, jute, ramie, seed, sisal, abaca, coir, bamboo, bagasse, cotton kapok, milkweed floss fibers, pineapple leaf fibers, cotton, rice, reed, esparto grass, Phalaris arundinacea, or combinations thereof.

[0021] Any combinations of wood pulp and non-wood plant material may be used. The wrapping material may be made of one kind of fibers or a mix of different fibers, e.g. natural fibers and reinforcing fibers. Natural fibers referred to herein may also be semi-synthetic fiber such as viscose or Lyocell. The natural fibers may be regenerated. For example, the natural fibers may be regenerated cellulose fibers. The regenerated cellulose fibers may be manmade cellulosic fibers, preferably manmade fibers formed of cellulose of natural origin, more preferably manmade fibers formed of cellulose that has not been chemically modified, such as viscose, rayon or lyocell

[0022] These fibers may be understood to offer environmentally friendly alternatives to traditional plastic packaging, helping to reduce waste and promote sustainability.

[0023] The wrapping material may comprise 50 to 100 wt%, preferably 70 to 100 wt%, more preferably 85 to 100 wt% of the natural fibers.

[0024] The wrapping material may comprise 50 to 99 wt%, preferably 70 to 99 wt%, more preferably 85 to 99 wt%, of the natural fibers and 1 to 50 wt%, preferably 1 to 30 wt%, more preferably 1 to 20 wt%, of reinforcing fibers.

[0025] The reinforcing fibers may be selected from polylactide (PLA) fibers, glycolic acid polymer (PGA) fibers, polyvinyl alcohol (PVA) fibers, bicomponent fibers comprising thermoplastic polymers, non-wood natural fibers, manmade cellulosic fibers, and combinations thereof. Bicomponent fibers are comprised of two polymers of different chemical and / or physical properties, extruded from the same spinneret with both polymers in the same filament. The non-wood natural fibers originate from nonwood plant materials as described above.

[0026] The reinforcing fibers may be manmade cellulosic fibers, preferably manmade fibers formed of cellulose of natural origin, more preferably manmade fibers formed of cellulose that has not been chemically modified, such as viscose, rayon or lyocell, most preferably viscose. Alternatively, the reinforcing fibers may be manmade fibers formed of cellulose that has been chemically modified.

[0027] The reinforcement fibers, having a greater length-weighted average fibre length than the natural fibers, add flexibility, stretch, strength and functional properties, to the sheet of wrapping material.

[0028] The natural fibers and reinforcing fibers may be randomly oriented.

[0029] The wrapping material may further comprise a binder selected from the group consisting of polyvinyl alcohols, polyvinyl acetate dispersions, ethyl vinyl alcohol dispersions, polyurethane dispersions, acrylic latexes, styrene butadiene dispersions, binders based on finely divided cellulose, binders based on cellulose derivatives, biopolymers and combinations thereof, preferably acrylic latexes. In some examples, the wrapping material may comprise a resin binder. The sheet of wrapping material may have a basis weight of 10 to 50 g / m2, preferably 15 to 30 g / m2.

[0030] When the packaging unit may be opened and the sheet of wrapping material may be removed, the absorbent hygienic article maybe released from the second layer, and the article may then be ready to be placed on a garment.

[0031] The absorbent hygienic article may have a top side and a bottom side. The bottom side may have an adhesive coating to releasably attach the absorbent hygienic article to the garment of the user. The adhesive coating may be arranged to be releasably attached to the releasing material to releasably attach the absorbent hygienic article to the sheet of wrapping material. When the packaging may be opened and the sheet of wrapping material may be removed, the adhesive coating may be exposed so that the article may be ready to be affixed to the garment.

[0032] The adhesive coating may cover all or part(s) of an outer surface, i.e., a garment-facing surface, of the disposable hygiene article, for example in the form of stripes across said surface.

[0033] The releasing material may comprise silicone.

[0034] The silicone may be, for example in the form of a polyorganosiloxane- polyamide copolymer or a polydimethylsiloxane-urea copolymer. A primer may be present between the sheet of wrapping material and the second layer of releasing material.

[0035] The sealing material may be a heat sealable material. In some of such examples, the overlapping regions of the packaging may be joined by the sealing material via heat sealing.

[0036] The heat sealable material may be a thermoplastic adhesive, which may be commonly referred to as ’’hot melt adhesive” and / or overlacquer.

[0037] The first layer may be applied with a pattern comprising elements of sealing material and uncoated parts.

[0038] It may be noted that any of the first surface and the second surface may refer to a single surface. In other examples, any of the first surface and the second surface may refer to different surfaces. That is, the first surface may be divided in different parts or sections on the inner side of the sheet of wrapping material. Similarly, in some examples, the second surface may be divided in different parts or sections on the inner side of the sheet of wrapping material.

[0039] The second surface may have an elongated shape, and may have two second longitudinal edges, and two second transversal edges. The second surface may have a larger size than a size of the absorbent hygienic article.

[0040] The uncoated portion may be uncoated by the sealing material and the releasing material. That is, devoid of any sealing material and any releasing material.

[0041] Similarly to the first surface and the second surface, in some examples, the uncoated portion may refer to a single surface. While in other examples, the first surface may be divided in different parts or sections on the inner side of the sheet of wrapping material.

[0042] A layer may be understood herein as an application of a material or coating. A layer may not have to be constituted by a continuous coating, but may consist of two or more coated areas.

[0043] To at least partially overlap may be understood to mean that the overlap may be partial or total. In some examples, the overlap may be total. That is, the first layer may be applied on the sheet of wrapping material, and the second layer may be applied onto the first layer, wherein the second surface may in all its extent be laid over the first surface. In other examples, the overlap may be partial. For example, the first surface may occupy the entirety of the inner side of the sheet of wrapping material, except of a central portion having an area smaller than that of the second surface. The second layer may then be applied in the center of the inner side of the sheet of wrapping material, over the central portion, so that the second layer may overlap all around its edges the first layer. In other examples the overlap may only happen in some portions of the second surface.

[0044] Adjacent may be understood to mean side-by-side, with no overlap.

[0045] At least partially adjacent may be understood to mean that the adjacency may not be kept all along the named edge, surface, portion or other part.

[0046] In a first group of examples, the sheet of wrapping material may lack the uncoated portion, the first layer may cover the whole inner side of the sheet of wrapping material, and the second layer may at least partially overlap the first layer. This may be understood to mean that a part of the second surface may be overlaid onto the first surface.

[0047] In a first subgroup of the first group of examples, the second layer may fully overlap the first layer. This may be understood to mean that the whole extent of the second surface may be overlaid onto the first surface. In such examples, the second surface may be smaller than the first surface. In a second group of examples, the inner side of the sheet of wrapping material may have the uncoated portion, and the second layer may at least partially overlap the first layer.

[0048] In a first subgroup of the second group of examples, a first portion free of the first layer may be arranged in a first transversal middle section of the sheet of wrapping material from one first longitudinal edge to the first longitudinal edge on the opposing side. In such examples, the first surface may be divided in two first sections. Each first section may extend from a respective first transversal edge to the first portion free of the first layer. The second layer may at least partially overlap the first layer with the two second transversal edges and at least a portion of the two second longitudinal edges. The uncoated portion may be arranged to be adjacent to a middle portion of the two second longitudinal edges, on both sides of the second surface.

[0049] In a second subgroup of the second group of examples, a second portion free of the first layer portion may be arranged in a first longitudinal middle section of the sheet of wrapping material from one first transversal edge to the first transversal edge on the opposing side. In such examples, the first surface may be divided in two second sections, each second section extending from a respective first longitudinal edge to the second portion free of the first layer. The second layer may at least partially overlap the first layer with the two second longitudinal edges and at least a portion of the two second transversal edges. The uncoated portion may be arranged to be adjacent to a middle portion of the two second transversal edges, on both sides of the second surface.

[0050] In a third group of examples, the inner side of the sheet of wrapping material may have the uncoated portion, and the second layer may not overlap with the first layer.

[0051] In a first subgroup of the third group of examples, a third portion free of the first layer may be arranged in two third sections: a) a second transversal middle section of the sheet of wrapping material, from one first longitudinal edge to the first longitudinal edge on the opposing side, and b) a second longitudinal middle section of the sheet of wrapping material, from one first transversal edge to the first transversal edge on the opposing side. The uncoated portion may be arranged to be adjacent to the full extent of the two second transversal edges, on both sides of the second surface and adjacent to a middle portion of the two second longitudinal edges, on both sides of the second surface. The first surface may be divided in four fourth sections. Each of the fourth sections may be arranged on a corner of the sheet of wrapping material. Each of the fourth sections may extend from a respective first longitudinal edge to a nearest edge of the second longitudinal middle section and the nearest second longitudinal edge, and from a respective first transversal edge to a nearest edge of the second transversal middle section.

[0052] In a second subgroup of the third group of examples, a fourth portion free of the first layer may be arranged in a third longitudinal middle section of the sheet of wrapping material, from one first transversal edge to the first transversal edge on the opposing side. The first surface may be divided in two sixth sections. Each sixth section may extend from a respective first longitudinal edge to the fourth portion free of the first layer and a nearest second longitudinal edge of the second surface. The uncoated portion may be arranged to be adjacent to the full extent of the two second transversal edges, on both sides of the second surface.

[0053] The packaging unit may have two transversal folding axes. The transversal folding axes divide the packaging unit into a first region, a second region and a third region. The packaging unit may be folded about said folding axes with the first region, the second region and the third region in an overlapping configuration.

[0054] Overlapping regions of the packaging unit may be joined by the sealing material along the first longitudinal edges of the sheet of wrapping material.

[0055] In general, the usage of “first”, “second”, “third” and / or “fourth” herein may be understood to be an arbitrary way to denote different elements, and may be understood to not confer a cumulative or chronological character to the nouns they modify.

[0056] Brief description of the drawings

[0057] Figure 1 is a top view of an exemplary packaging unit, according to a first group of examples herein.

[0058] Figure 2 is a top view of an exemplary packaging unit, according to a first subgroup of a second group of examples herein.

[0059] Figure 3 is a top view of an exemplary packaging unit, according to a second subgroup of a second group of examples herein.

[0060] Figure 4 is a top view of an exemplary packaging unit, according to a first subgroup of a third group of examples herein.

[0061] Figure 5 is a top view of an exemplary packaging unit, according to a second subgroup of a third group of examples herein.

[0062] Figure 6 illustrates folding of an exemplary packaging unit.

[0063] Figure 7 is a top view of the exemplary packaging unit after folding and sealing. Detailed

[0064] Figure 1 is a top view of an exemplary packaging unit 1 , according to a first group of examples herein. The packaging unit 1 comprises an absorbent hygienic article 2. The packaging unit 1 further comprises a sheet of wrapping material 3 comprising natural fibers. The sheet has two first longitudinal edges 4, 5, two first transversal edges 6, 7, an inner side 8, seen on Fig. 1 from the top view, and an outer side 9, not visible in Fig. 1. The packaging unit 1 comprises a first layer 10 of sealing material to seal the packaging unit 1 . The first layer 10 is applied on a first surface 11 of the inner side 8 of the sheet of wrapping material 3. The packaging unit 1 also comprises a second layer 12 of releasing material to releasably attach the absorbent hygienic article 2 to the sheet of wrapping material 3. The second layer 12 is arranged onto a second surface 13 of the inner side 8 of the sheet of wrapping material 3. The second surface 13 is smaller than the inner side 8 of the sheet of wrapping material 3, is arranged in a central portion of the inner side 8 of the sheet of wrapping material 3, and has a larger size than a size of the absorbent hygienic article 2. The first surface covers at least a portion of the four first edges 4, 5, 6, 7 of the sheet of wrapping material 3. In at least the portion of the four first edges 4, 5, 6, 7, the first surface is free of the second layer 12. As this non-limiting example shows, according to the first group of examples herein, the sheet of wrapping material 3 lacks an uncoated portion. The first layer 10 covers the whole inner side 8 of the sheet of wrapping material 3, and the second layer 12 fully overlaps the first layer 10.

[0065] In may be understood that usage of the reference numbers used in Fig. 1 in describing other Figures herein, may be understood to refer to the same elements already mentioned in relation to Fig. 1.

[0066] Figure 2 is a top view of an exemplary packaging unit 1 , according to a first subgroup of a second group of examples herein. In this non-limiting example, the inner side 8 of the sheet of wrapping material 3 has an uncoated portion 20. The second layer 12 at least partially overlaps the first layer 10. A first portion 21 free of the first layer is arranged in a first transversal middle section of the sheet of wrapping material 3 from one first longitudinal edge 4 to the first longitudinal edge 5 on the opposing side. The first surface 11 is divided in two first sections 22, 23, each first section 22, 23 extending from a respective first transversal edge 6,7 to the first portion 21 free of the first layer. The second layer 12 at least partially overlaps the first layer 10 with the two second transversal edges 24, 25 and at least a portion of the two second longitudinal edges 26, 27. The uncoated portion 20 is arranged to be adjacent to a middle portion of the two second longitudinal edges 24, 25, on both sides of the second surface 12. Figure 3 is a top view of an exemplary packaging unit 1 , according to a second subgroup of a second group of examples herein. In this non-limiting example, a second portion 30 free of the first layer is arranged in a first longitudinal middle section of the sheet of wrapping material 3 from one first transversal edge 6 to the first transversal edge 7 on the opposing side. The first surface 11 is divided in two second sections 31 , 32. Each second section 31 , 32 extends from a respective first longitudinal edge 4, 5 to the second portion 30 free of the first layer 30. The second layer 12 at least partially overlaps the first layer 10 with the two second longitudinal edges 26, 27 and at least a portion of the two second transversal edges 24, 25. The uncoated portion 20 is arranged to be adjacent to a middle portion of the two second transversal edges 24, 25, on both sides of the second surface 12.

[0067] Figure 4 is a top view of an exemplary packaging unit 1 , according to a first subgroup of a third group of examples herein. In this non-limiting example, a third portion 40 free of the first layer is arranged in two third sections 41 , 42: a) a second transversal middle section 41 of the sheet of wrapping material 3, from one first longitudinal edge 4 to the first longitudinal edge 5 on the opposing side, and b) a second longitudinal middle section 42 of the sheet of wrapping material, from one first transversal edge 6 to the first transversal edge on the opposing side 7. The uncoated portion 20 is arranged to be adjacent to the full extent of the two second transversal edges 24, 25, on both sides of the second surface 12 and adjacent to a middle portion of the two second longitudinal edges 26, 27, on both sides of the second surface 12. The first surface 11 is divided in four fourth sections 43, 44, 45, 46. Each of the fourth sections 43, 44, 45, 46 is arranged on a corner of the sheet of wrapping material 3. Each of the fourth sections 43, 44, 45, 46 extends from a respective first longitudinal edge 4 to a nearest edge of the second longitudinal middle section 42 and the nearest second longitudinal edge 26, 27, and from a respective first transversal edge 6, 7 to a nearest edge of the second transversal middle section 41.

[0068] Figure 5 is a top view of an exemplary packaging unit 1 , according to a second subgroup of a third group of examples herein. In this non-limiting example, a fourth portion 50 free of the first layer is arranged in a third longitudinal middle section of the sheet of wrapping material 3, from one first transversal edge 6 to the first transversal edge 7 on the opposing side. The first surface 11 is divided in two sixth sections 51 , 52, each sixth section 51 , 52 extending from a respective first longitudinal edge 4, 5 to the fourth portion 50 free of the first layer and a nearest second longitudinal edge 26, 27 of the second surface 13. The uncoated portion 20 is arranged to be adjacent to the full extent of the two second transversal edges 24, 25, on both sides of the second surface 13.

[0069] Figure 6 illustrates, without showing the absorbent hygienic article that is attached to the packaging, how the packaging unit 1 is folded about said folding axes 60 with the first region 61 , the second region 62 and the third region 63 in an overlapping configuration.

[0070] Figure 7 depicts, without showing the absorbent hygienic article enclosed by the packaging, the packaging unit 1 after folding of the packaging unit in an overlapping configuration and after overlapping regions of the packaging have been joined by the sealing material via heat sealing along the first longitudinal edges 4, 5 of the sheet of wrapping material.

Claims

1. CLAIMS1 . A packaging unit comprising: an absorbent hygienic article, a sheet of wrapping material comprising natural fibers, the sheet having two first longitudinal edges, two first transversal edges, an inner side and an outer side, a first layer of sealing material to seal the packaging unit, the first layer being applied on a first surface of the inner side of the sheet of wrapping material, a second layer of releasing material to releasably attach the absorbent hygienic article to the sheet of wrapping material, the second layer being arranged onto a second surface of the inner side of the sheet of wrapping material, wherein the second surface is smaller than the inner side of the sheet of wrapping material, is arranged in a central portion of the inner side of the sheet of wrapping material, and wherein the first surface covers at least a portion of the four first edges of the sheet of wrapping material, wherein in at least the portion of the four first edges, the first surface is free of the second layer, wherein whether or not the second layer and the first layer at least partially overlap is subject to a proviso, the proviso being based on whether or not the sheet of wrapping material has an uncoated portion, wherein the proviso is one of: with the proviso the inner side of the sheet of wrapping material lacks the uncoated portion, the second layer at least partially overlaps the first layer, and with the proviso the inner side of the sheet of wrapping material has the uncoated portion, the at least partial overlap is not required, the uncoated portion is located on at least two opposing edges of the sheet of wrapping material, and surrounded on both sides of the edges by the first layer, and wherein the first layer is at least partially adjacent to the second layer in nonoverlapping portions.

2. The packaging unit according to claim 1 , wherein the uncoated portion is uncoated by the sealing material and the releasing material.

3. The packaging unit according to any one of the preceding claims, wherein the second surface has an elongated shape, and has two second longitudinal edges, and two second transversal edges.

4. The packaging unit according to any one of the preceding claims, wherein the sheet of wrapping material lacks the uncoated portion, wherein the first layer covers the whole inner side of the sheet of wrapping material, and wherein the second layer at least partially overlaps the first layer.

5. The packaging unit according to claim 4, wherein the second layer fully overlaps the first layer.

6. The packaging unit according to any one of claims 1-3, wherein the inner side of the sheet of wrapping material has the uncoated portion, and wherein the second layer at least partially overlaps the first layer.

7. The packaging unit according to claims 2, 3 and 6, wherein a first portion free of the first layer is arranged in a first transversal middle section of the sheet of wrapping material from one first longitudinal edge to the first longitudinal edge on the opposing side, wherein the first surface is divided in two first sections, each first section extending from a respective first transversal edge to the first portion free of the first layer, wherein the second layer at least partially overlaps the first layer with the two second transversal edges and at least a portion of the two second longitudinal edges, and wherein the uncoated portion is arranged to be adjacent to a middle portion of the two second longitudinal edges, on both sides of the second surface.

8. The packaging unit according to claims 2, 3 and 6, wherein a second portion free of the first layer is arranged in a first longitudinal middle section of the sheet of wrapping material from one first transversal edge to the first transversal edge on the opposing side, wherein the first surface is divided in two second sections, each second section extending from a respective first longitudinal edge to the second portion free of the first layer, wherein the second layer at least partially overlaps the first layer with the two second longitudinal edges and at least a portion of the two second transversal edges, and wherein the14 uncoated portion is arranged to be adjacent to a middle portion of the two second transversal edges, on both sides of the second surface.

9. The packaging unit according to any one of claims 1-3, wherein the inner side of the sheet of wrapping material has the uncoated portion, and wherein the second layer does not overlap with the first layer.

10. The packaging unit according to any one of claims 2, 3 and 9, wherein a third portion free of the first layer is arranged in two third sections: a) a second transversal middle section of the sheet of wrapping material, from one first longitudinal edge to the first longitudinal edge on the opposing side, and b) a second longitudinal middle section of the sheet of wrapping material, from one first transversal edge to the first transversal edge on the opposing side, wherein the uncoated portion is arranged to be adjacent to the full extent of the two second transversal edges, on both sides of the second surface and adjacent to a middle portion of the two second longitudinal edges, on both sides of the second surface, and wherein the first surface is divided in four fourth sections, each of the fourth sections being arranged on a corner of the sheet of wrapping material, each of the fourth sections extending from a respective first longitudinal edge to a nearest edge of the second longitudinal middle section and the nearest second longitudinal edge, and from a respective first transversal edge to a nearest edge of the second transversal middle section.11 . The packaging unit according to claims 2, 3 and 9, wherein a fourth portion free of the first layer is arranged in a third longitudinal middle section of the sheet of wrapping material, from one first transversal edge to the first transversal edge on the opposing side, wherein the first surface is divided in two sixth sections, each sixth section extending from a respective first longitudinal edge to the fourth portion free of the first layer and a nearest second longitudinal edge of the second surface, wherein the uncoated portion is arranged to be adjacent to the full extent of the two second transversal edges, on both sides of the second surface.

12. The packaging unit according to any one of the preceding claims, wherein the packaging unit has two transversal folding axes, the transversal folding axes dividing the packaging unit into a first region, a second region and a third15 region, and the packaging unit is folded about said folding axes with the first region, the second region and the third region in an overlapping configuration.

13. The packaging unit according to claim 12, wherein overlapping regions of the packaging unit are joined by the sealing material along the first longitudinal edges of the sheet of wrapping material.

14. The packaging unit according to claim 13, wherein the sealing material is a heat sealable material, and wherein the overlapping regions of the packaging are joined by the sealing material via heat sealing.

15. The packaging unit according to any one of the preceding claims, wherein the first layer is applied with a pattern comprising elements of sealing material and uncoated parts.

16. The packaging unit according to any one of the preceding claims, wherein the releasing material comprises silicone.

17. The packaging unit according to any one of the preceding claims, wherein the absorbent hygienic article has a top side and a bottom side, wherein the bottom side has an adhesive coating to releasably attach the absorbent hygienic article to a garment of a user, and wherein the adhesive coating is arranged to be releasably attached to the releasing material to releasably attach the absorbent hygienic article to the sheet of wrapping material.

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