WO2023227780A1

WO2023227780A1 - Packaging material web and packaging pouch

Info

Publication number: WO2023227780A1
Application number: PCT/EP2023/064257
Authority: WO
Inventors: Bastian Schalk
Original assignee: Sprick Gmbh Bielefelder Papier- Und Wellpappenwerke & Co.
Priority date: 2022-05-27
Filing date: 2023-05-26
Publication date: 2023-11-30
Also published as: DE102022113441A1

Abstract

The present invention relates to a packaging material web, which can be formed into a packaging pouch for wrapping a shipment item, comprising an outer layer, and inner layer and a cushion layer arranged between the outer layer and the inner layer, wherein at least one layer comprises paper, paperboard or cardboard, characterised in that the inner layer is provided with an adhesive coating, more particularly a cold-sealing adhesive coating, at least in some regions.

Description

Packaging material sheet and packaging bag

The present invention relates to a packaging material web and a packaging bag. Packaging material webs and packaging bags according to the invention are used in the packaging industry to package objects, in particular shipping items, in particular to protect them from damage during shipping. Generic materials for packaging material webs, packaging bags and packaging material blanks consist of paper, such as recycled paper, and/or are processed into cardboard, in particular corrugated cardboard, or cardboard.

WO 2005/080519 Ai discloses a packaging material web and a packaging bag made therefrom for packaging food. The packaging material web has longitudinal edge strips that extend parallel to the longitudinal edges and are provided with a cold-sealable adhesive. Furthermore, the packaging material web has transverse strips with cold-sealable adhesive that extend transversely to the longitudinal direction of the web. In order to form a packaging bag, the packaging material web is separated along the transverse adhesive strips and bent around the respective article and glued or closed in the longitudinal and transverse directions by means of the adhesive edge strips in order to completely enclose the article in the packaging material web in a packaging bag.

What has proven to be a disadvantage of the packaging material web or the packaging bag according to WO 2005/080519 Ai is that a relatively large amount of force is necessary to fold the packaging material web and to place the packaging material web around the article in order to form a closed packaging bag. Furthermore, it was found to be disadvantageous that the packaging material web and in particular the packaging bag only adapts slightly to different article sizes.

A packaging material web that can be processed more easily and with less effort and can be more specifically adapted to different item sizes is known from the applicant's DE 102020 114211 Ai. The packaging material web consists, for example, of corrugated cardboard and is provided with a cold-sealable adhesive. Furthermore, several folding joints oriented in the longitudinal direction of the web are introduced into the packaging material web, along which the packaging material web can be easily folded around the article to be packaged.

The packaging material web designed in this way is generally very popular. However, it has been shown that there is potential for optimization with regard to the cushioning properties and the adhesive application and bag forming.

One object of the present invention is to overcome the disadvantages of the prior art, in particular to further develop a generic packaging material web in such a way that the cushioning properties are improved and/or the application of adhesive and/or the bag formation are facilitated.

The task is solved by the subjects of the independent claims.

A packaging material web is then provided which can be formed to wrap a shipping item. The packaging material web according to the invention is constructed in multiple layers. The different layers can be connected to one another using various fastening techniques, such as embossing or gluing. The individual layers can be made of paper, cardboard or cardboard. According to DIN 6730, paper is characterized in that it has a grammage in the range from 7 to 225 g/m ² , cardboard has a grammage from 226 g/m ² and cardboard in general use has a grammage between 150 and 600 g/m ² .

The layers of the packaging material web can be made from paper, such as recycled paper, in particular waste paper and/or 100% recyclable paper, which can be made without chemical ingredients. Recycled paper is in particular paper materials with a small proportion (less than 50%) of paper material containing fresh fibers. For example, paper materials that contain 70% to 100% recycled paper are used. The recycled paper in the context of this invention can be paper material which can have a tensile strength index along the machine direction of at most 90 Nm / g, preferably a tensile strength of 15 Nm / g to 60 Nm / g, and a tensile strength index across the machine direction of at most 60 Nm / g can have, preferably a tensile strength of 5 Nm / g to 40 Nm / g. To determine the tensile strength or the tensile strength index, a standard DIN EN ISO 1924-2 or DIN EN ISO 1924-3 can be used. Additionally or alternatively, a recycled paper property or waste paper property can be characterized by the so-called bursting resistance. A material in this sense is recycled paper with a burst index of at most 3.0 kPa*m ² /g, preferably with a burst index from 0.8 kPa*m ² /g to 2.5 kPa*m ² /g. The DIN EN ISO 2758 standard is used to determine the burst index. Furthermore, the packaging material has a mass per unit area of in particular 40 g/m ² to a maximum of 140 g/m ² . The starting packaging material can be in the form of a roll of material web or a zigzag-folded stack of packaging material, which is also known as a fanfold stack.

In the context of the present invention, depending on the packaging requirements, a suitable type of paper is used for the respective layer of the packaging material web. The packaging material web itself, i.e. structure and number of layers, is thus designed to be adaptable to the type of paper used. Each layer can be designed in one or more layers.

Paper, cardboard and/or cardboard can also be used to lay out the packaging material web. Other materials made of plastic, such as a foam made of polyurethane or the like that can be applied to a surface, can also be used. The packaging material web can be designed universally and flexibly and is designed to be adaptable to the respective requirements and the respective application. This also refers to the number and structure of each location.

If paper is used to design the packaging material web, it has a mass per unit area in the range of 30 g/m ² to 225 g/m ² . The paper can be flat and can also be used as a liner. Alternatively, it can also be spatially designed, for example corrugated. Furthermore, the paper can be designed as a test liner. It is preferably designed as a kraft liner. The paper itself is designed as a layer and can have one or more layers.

If cardboard is used to design the packaging material web, it has a mass per unit area of more than 225 g/m ² . Depending on the height of the mass per unit area, the cardboard can also be flat. As part of the design freedom of the packaging material web, the cardboard can also be used as a liner. However, the cardboard itself is preferably spatially designed or shaped in comparison to the paper mentioned at the beginning and is, for example, corrugated. The cardboard itself is also designed as a layer or as a further layer and can have one or more layers.

If a cardboard box is used to design the packaging material web, it is preferably designed in multiple layers. In a first embodiment of a cardboard box, it is made from at least two layers of paper. Another embodiment of a box provides a number of layers of paper and/or cardboard, in this embodiment the box has at least two layers. The mass per unit area of a cardboard box can range from 150 g/m ² to 600 g/m ² .

In the context of the present invention, the following types of paper are used in particular:

Kraftliner is a cover paper made from unbleached (brown) or bleached (white, we don't have) kraft pulp. Due to the primary fibers used (fresh fibers), there is a good fiber-fiber connection and therefore good strength properties. Kraftliner papers have a high tear resistance and are therefore suitable for packaging with high strength requirements.

Testliner is a two-layer recycled cover paper made from 100% recycled paper. Depending on the strength values, Testliner is classified as TL1-TL3. Due to the fiber composition, the tear strength of these papers is lower than that of kraftliner. However, the stiffness properties are comparable to those of the kraftliner. Since the testliner papers also have to meet specified quality characteristics, only certain waste papers (e.g. corrugated cardboard waste) are used in production. Testliner is more cost-effective than Kraftliner and makes an important contribution to environmental protection thanks to the recycled fibers. Testliner is particularly suitable for packaging with medium strength requirements as an inner and outer cover for corrugated cardboard.

Mixed soda papers are substitute kraft papers in low basis weights. These are now only made from high-quality waste paper (kraft paper). N2 has lower strength values than NM.

Kraftliner covered in white is a two-layer ceiling paper. Here the good strength properties of a brown kraftliner are combined with the good printability properties of a white kraftliner. Its two-layer design results in good strength properties (plywood effect). This paper is particularly suitable if, in addition to the high demands on printability, there are also high demands on the strength properties.

In order to fill the gaps between the fibers of a paper surface and cover the entire fiber layer, an application of coating slip may be necessary. This coating gives the paper a higher surface quality and is therefore suitable for use with high-quality printed motifs. However, the applied printing ink film (particularly in the case of multi-color halftone prints) is relatively sensitive to mechanical stress and must therefore be sealed with an overprint varnish for optimal protection against abrasion.

This paper is particularly suitable when, in addition to the high strength requirements for the packaging, there are also very high demands on the quality of the surface and the printing results.

Testliner white “is a multi-layer ceiling paper that is predominantly made from recycled fibers. For the white top side, predominantly white waste paper is used (e.g. printing paper, hygiene paper, etc.). The structure of Testliner painted white is identical to that of Testliner white. In order to improve the surface here too, a coating compound is applied, as with Kraftliner.

Due to the waste paper fibers used, the strength properties of these two papers are lower than those of white-covered kraftliner or white-painted kraftliner.

This paper has a brown kraftliner backing covered with a thin, cloudy bleached pulp layer. The flamed effect (marble effect) is created by the brown kraftliner showing through the bleached cellulose layer. The strength and processing properties roughly correspond to those of brown kraftliner.

The same situation applies to this paper as to Kraftliner flamed white, but here the paper layers are based on recycled paper.

While the cover papers are usually papers with a high density, which determine certain strength properties and the appearance of the corrugated papers, other requirements must be placed on the corrugated papers. Corrugated papers have a lower density, are voluminous and must be easy to emboss. When fully developed, they should have a high level of rigidity.

Fluting is a fluted paper that is made predominantly from primary fibers (fresh fibers). The term semi-pulp comes from the semi-chemical and semi-mechanical pulping of the fibers. Through a chemical process, the components of the wood that are undesirable for paper production, e.g. B. resin or lignin, partially dissolved out. This is then followed by mechanical post-treatment (defibration).

When fully formed, semi-pulp papers have a high level of rigidity and are therefore particularly suitable as corrugated paper for packaging that is exposed to high stacking loads (stack compression resistance). Due to its high stiffness (brittleness), processing is more difficult than corrugated material. Corrugated material is a corrugated paper made from waste paper. The strength and stiffness properties are between 20% and 30% lower than those of semi-pulp. The difference to our Schrenz is the sizing of the paper. A thin film of starch is applied to the paper in the machine.

Since corrugating materials, like testliner papers, are predominantly made from waste paper, their share, together with Schrenz and Schrenz Duplex papers, has now risen to over 70% of the paper used in the corrugated cardboard industry. With this high proportion of recycled paper, the German corrugated cardboard industry has been making an important contribution to protecting our raw materials and protecting the environment for years.

The packaging material web extends in a longitudinal direction and may have a constant web/material thickness and/or a constant width viewed transversely to the longitudinal direction of the web. In the width direction, the packaging material web ends at a longitudinal edge or at a longitudinal edge extending in the longitudinal direction of the web. For example, the packaging material web has a width of at least 200 mm and in particular of at most 2,000 mm. For example, the width is approximately 500 mm.

The packaging material web according to the invention comprises an outer layer, an inner layer and a padding layer arranged between the outer bearing and the inner layer. This includes at least one layer of paper, cardboard or cardboard.

The outer layer facing the environment can form an outside of the packaging bag and can have, for example, paper, cardboard or cardboard.

The inner layer facing the environment can form an inside of the packaging bag and comprise paper, cardboard or cardboard.

The padding layer lies between the outer layer and the inner layer when viewed in a direction transverse to the plane of the web. The padding layer can rest on the inner layer and on the outer layer, in particular be fastened thereto, so that a relative movement of the individual layers to one another is prevented. The packaging material web is therefore constructed as a sandwich structure or in multiple layers. The cushion layer is flexible and dampening, in particular transversely to the direction of the web, and/or serves to absorb shocks or impacts that can affect the packaging and the packaging material web, for example during logistics or the transport of goods, and thereby protects the goods in the packaging from mechanical influences , especially from external mechanical influences. This flexible and cushioning padding layer can be constructed in different ways. The cushion layer can be designed, for example, as a wave layer. It is essential that the Damping or pole structure extends out of the web plane, in particular perpendicular to the packaging material web and thus has a significant three-dimensional extent. For example, the corrugated structure has a plurality of beads or cups, which are at a particularly regular distance from one another and extend along the plane in the longitudinal and/or transverse direction of the packaging material web. This spatial structure is also made from an originally just provided paper or from an originally just provided cardboard by reshaping or original shaping.

Each of the spatial structures mentioned is designed as a layer because of its flexibility and damping ability to absorb shocks or impacts and is preferably made of paper or cardboard. In a continuation and using a different material, the flexible and damping structure is provided as a foam, such as polyurethane foam, with the foam itself forming the spatial structure.

If the packaging material web is designed in a single layer, it can consist of paper or cardboard with a mass per unit area of more than 200 g/m ² . This single-layer packaging material web itself has the outside and the inside. Furthermore, this design of the packaging material web is designed to be inherently flexible or dampening. The flexibility or damping ability is indeed very low, but it has been found that such flexibility or damping ability is sufficient for particularly simple packaging requirements.

Special features of the external situation should also be mentioned. This can be designed in multiple layers, with the outside of the outer layer, which forms the outside of the packaging, being provided at least in sections with a coating which forms particularly good adhesion for stickers or labels for shipping. Furthermore, the coating can be designed to better absorb prints. Alternatively, the outside of the outer layer itself is designed as a high-energy or as a polar or as an olefin surface and is designed to accommodate prints and/or stickers and to fix them firmly. Alternatively, the outer layer or an outer layer assigned to the outer layer is designed as a printable and/or as a printable layer or layer.

Special features of the inside should also be mentioned. This is arranged on the side opposite the outside of the packaging material web and has the adhesive on its surface. Depending on the surface quality or the choice of material used, the inside can be provided with an adhesive carrier before the adhesive itself is applied. The packaging bag according to the invention, which can be produced from the packaging material web, comprises an outer layer made of paper, cardboard or cardboard which forms the outside of the packaging bag.

Furthermore, the arrangement of the flexible or damping layer should be mentioned if it is wave-shaped or designed in the manner of a sine wave. The waveform itself extends transversely to the longitudinal direction of the packaging material web and is therefore aligned parallel to the central longitudinal axis of a roll when the packaging material web is rolled up as such a roll-forming roller conveyor and is provided for producing the shipping bags.

According to a first aspect of the present invention, the inner layer, in particular packaging bags, is coated on the inside, i.e. on its surface facing away from the outer layer and facing the inside of the packaging bag, at least in some areas with an adhesive that can be cold-sealed in particular. In other words, the inner layer is provided with a particularly cold-sealable adhesive coating. The inner layer can be coated with the adhesive over the entire surface or in sections. For example, it is possible for at least one longitudinal edge strip of the packaging material web adjacent to a longitudinal edge to be provided at least in sections with a particularly cold-sealable adhesive.

In an advantageous embodiment, the adhesive is provided over the entire surface of the inner layer. Since the packaging material web is designed in the manner of an endless packaging material web, packaging bags of different lengths can be produced from it by designing the endless packaging material web to be cut to length. The length of the packaging bag extends in the longitudinal direction of the packaging material web and if the entire surface of the packaging material web is provided with adhesive on the inner layer, adhesive is always present both inside the packaging bag and on the joining surfaces to be glued. The adhesive itself has anti-slip properties, so that the goods are practically fixed within the packaging bag with a high level of friction and do not slip during transport. If there are several goods items inside the packaging bag, they are practically fixed to one another when the adhesive is applied to the entire surface of the inner layer, so that these goods items do not hit each other during transport. Advantageously, additional padding or fillings within the packaging bag can therefore be dispensed with.

The cold sealable adhesive is capable of creating a permanent bond between packaging material web surfaces. The cold-sealable adhesive, in particular the connection between two surfaces achieved by means of the cold-sealable adhesive, can are characterized by the fact that the connection cannot be released without destruction. Furthermore, the cold-sealable adhesive can be characterized in that the longitudinal edge strips provided and bonded with cold-sealable adhesive cannot be pulled off or removed from one another without injuring or destroying the packaging material to be bonded, in particular paper or cardboard, in particular corrugated cardboard. According to one embodiment, the adhesive is a natural rubber latex-based adhesive, ie an adhesive that contains natural rubber latex. The cold-sealable adhesive can comprise, for example, latex and a styrene-acrylate copolymer, and optionally a proportion of 0.4% to 0.6% of a defoamer. An adhesive solids content can be, for example, 50% ± 10%, with the remainder being water. The cold-sealable adhesive can be applied to the at least one longitudinal edge strip, for example by means of rollers, i.e. by a roller application, which can consist, for example, of rubber, brass or copper, by spraying or by spraying paint. For example, the cold-sealable adhesive is an aqueous dispersion based on natural latex. For example, commercially available cold-sealable adhesives can be used.

According to a preferred embodiment, the adhesive, in particular the cold-sealable adhesive, comprises natural rubber latex, a styrene-acrylate copolymer and preferably a defoamer. It has been found that an adhesive which comprises natural rubber latex, a styrene-acrylate copolymer and optionally a defoamer achieves excellent adhesive effects and is particularly advantageous for the packaging material webs and packaging bags according to the invention. By adding styrene-acrylate copolymer to the adhesive, the adhesion of the adhesive is significantly improved compared to a natural rubber latex-based adhesive without styrene-acrylate copolymer. Compared to natural rubber latex-based adhesives, which have other polymers instead of a styrene-acrylate copolymer, a natural rubber latex-based adhesive with a styrene-acrylate copolymer has the advantage that the adhesive has extremely high resistance. An adhesive which comprises natural rubber latex and a styrene-acrylate copolymer therefore has particularly advantageous properties in relation to application to packaging material webs or packaging bags.

According to one embodiment, the adhesive, in particular a cold-sealable adhesive, can be present as an aqueous dispersion. An adhesive in the form of an aqueous dispersion is particularly suitable for application to webs of packaging material.

The adhesive, in particular a cold-sealable adhesive, for example a cold-sealable adhesive present as a dispersion, preferably has a pH of at least pH 8, more preferably of at least pH 9. A pH value of the adhesive of at least pH 8, preferably pH 9, can prevent components of the natural rubber latex stand out. The pH of the adhesive can optionally be adjusted to the desired pH, preferably at least pH 8, more preferably at least pH 9, by adding a base, for example ammonia. According to one embodiment, the adhesive contains a base, for example ammonia, and preferably has a pH of at least pH 8, more preferably pH 9.

According to one embodiment, the adhesive comprises natural rubber latex, a styrene-acrylate copolymer and preferably a defoamer, as well as at least one further component selected from a wetting agent, a stabilizing agent, a base, an antiblocking agent, a UV tracer, and an ethylene-vinyl acetate copolymer and a polyvinyl acetate. The adhesive may contain one or more of the other components. The adhesive may comprise, for example, any combination of a wetting agent, a stabilizing agent, a base, an antiblocking agent, a UV tracer, an ethylene-vinyl acetate copolymer and a polyvinyl acetate, for example a wetting agent, a base and a UV tracer.

According to one embodiment, the adhesive comprises a defoamer and optionally a further component selected from a wetting agent, a stabilizing agent, a base, an antiblocking agent, a UV tracer, an ethylene-vinyl acetate copolymer and a polyvinyl acetate. A defoamer may include, for example, a silicon-based compound such as emulsified silicone or silica, a wax, a mineral oil, a hydrocarbon, polyether, fatty acid-based compounds such as stearate, acylglycerols, glycol esters and/or polyol. The use of the adhesive can be made easier by using a defoamer, as the adhesive is prevented from foaming during use. It has been found that foaming the adhesive by a defoamer in an amount in a range of 0.2% by weight to 0.8% by weight, preferably in a range of 0.4% by weight to 0.6% by weight .%, can be effectively prevented. According to a preferred embodiment, the cold-sealable adhesive contains a defoamer in an amount in a range from 0.2% by weight to 0.8% by weight, preferably in a range from 0.4% by weight to 0.6% by weight. According to one embodiment, the adhesive in a dried or non-dried state, preferably the adhesive in a non-dried state, comprises defoamers in an amount in a range of 0.2% by weight to 0.8% by weight, preferably in one Range from 0.4% to 0.6% by weight.

According to one embodiment, the adhesive comprises a wetting agent. A wetting agent reduces the interfacial tension between two phases and can support the formation of dispersions. A wetting agent may be a nonionic wetting agent, an anionic wetting agent, a cationic wetting agent and/or an amphoteric Wetting agents include, preferably a nonionic wetting agent and/or an anionic wetting agent. A wetting agent can include, for example, fatty acid esters, fatty alcohol ether sulfates, fatty alcohol polyglycol ethers, fatty alcohol sulfates, alkyl sulfosuccinates, alkyl sulfosuccinamates, alkyl benzene sulfates, fatty alcohol ether phosphates and/or alkyl aryl ether sulfates. It has been found that an adhesive with a wetting agent can be distributed particularly evenly on the packaging material web. According to one embodiment, the adhesive has a wetting agent in an amount ranging from 0.0% by weight to 3% by weight.

According to one embodiment, the adhesive comprises a stabilizing agent. A stabilizing agent is an optional adhesive component that serves to improve the properties of the adhesive and/or the adhesive layer in terms of stability, in particular in relation to the influences of storage, processing and stress. Stabilizing agents may include any agents that improve the stability of the adhesive, for example polysaccharides, cellulose derivatives, resins, polymers such as polyvinyl alcohol, aluminum oxide, carbon black and/or kaolin. According to one embodiment, the adhesive has a stabilizing agent in an amount ranging from 0.01% by weight to 5% by weight.

The cold-sealable adhesive may contain a base, for example ammonia. The pH of the adhesive can be adjusted using a base, for example to a pH of at least pH 8, preferably at least pH 9.

According to one embodiment, the adhesive may contain an antiblocking agent, which may include, for example, an amide wax, such as erucic acid or oleic acid amide, talc and/or chalk. An anti-blocking agent promotes easier handling, for example when opening a packaging bag. According to one embodiment, the adhesive comprises an antiblocking agent in an amount ranging from 0.01% to 5% by weight.

According to one embodiment, the adhesive can contain a UV tracer. A UV tracer can be made visible under UV irradiation and can be used, for example, to detect coated surfaces, for quality control and/or for (cutting) position detection when producing the packaging material web or the packaging bag. For example, UV-fluorescent additives can be used as UV tracers. According to one embodiment, the adhesive has a UV tracer in an amount ranging from 0.01% by weight to 1% by weight.

According to a preferred embodiment, the packaging material web is designed with a coating, for example with a coating of the inner layer on the inside of the packaging bag, the coating containing the adhesive in an amount in a range of 2 g/m ² to 20 g/m ² , preferably 10 g/m ² to 12 g/m ² . According to one embodiment, the coating comprises the adhesive in an amount in a range of 2 g/m ² to 20 g/m ² , preferably 10 g/m ² to 12 g/m ² , wherein the adhesive is in a dried state or in a non-dried state, preferably in a dried state. An adhesive in a dried state is a dried adhesive that can be obtained by drying, for example by oven drying, the adhesive, in particular the adhesive applied to the packaging material web. According to one embodiment, the adhesive is in the dried state in the form of solid particles. An adhesive in a non-dried state is a non-dried adhesive which has a water content in a range of 30% by weight to 70% by weight and is preferably present as a dispersion. According to the invention, a coated surface of the packaging material web, for example a surface of the inner layer coated on the inside of the packaging bag, can contain an amount of adhesive in a range of 2 g/m ² to 20 g/m ² , preferably 10 g/m ² to 12 g/m ² on the coated surface. According to one embodiment, the amount of adhesive in a range from 2 g/m ² to 20 g/m ² , preferably 10 g/m ² to 12 g/m ² , relates to a dried state of the adhesive, ie to the solid particles of the adhesive. The adhesive is preferably applied evenly over the coated surface in order to increase the adhesive strength of the adhesive connections.

According to one embodiment, the adhesive can have a water content in a range of <10% by weight or 30% by weight to 70% by weight, preferably in a range of <10% by weight or 40% by weight to 60% by weight. It has been found that an adhesive with a water content of 30% by weight to 70% by weight, in particular 40% by weight to 60% by weight, can be applied particularly well to webs of packaging material. After the adhesive has been applied to the packaging material web, the adhesive can optionally be dried, resulting in a water content of <10% by weight. An adhesive with a water content of <10% by weight has a particularly high storage stability. An adhesive applied to the packaging material web in a dried state has a water content of <10% by weight, preferably <5% by weight. An adhesive applied to the packaging material web in a non-dried state has a water content of 30% by weight to 70% by weight, preferably 40% by weight to 60% by weight. A packaging material web with dried and/or non-dried adhesive has excellent adhesive properties and is suitable for forming into a packaging bag.

The adhesive, which is a natural rubber latex-based adhesive, is preferably applied in such a way that in the finished product there is no contact between an applied printing ink film and the adhesive in order to prevent premature aging of the adhesive due to a reaction of the natural rubber latex with components of the printing ink film. With the packaging material web according to the invention, an article, such as a packaging and/or shipping item, can be wrapped or wrapped in a simple manner using the packaging material web. This is done by folding the packaging material web and moving the folding sections towards one another and, if necessary, placing them on one another, so that a permanent connection, in particular sealing, of the two folding section surfaces facing one another can be produced solely through the mutual contact of the folding section surfaces provided with adhesive. The cold-sealable adhesive can also be set up in such a way that activation of the adhesive/sealing effect is necessary so that the adhesive develops its adhesive/sealing effect. The activation can be achieved, for example, by applying pressure from the outside, which causes the cold-sealable adhesive to develop its adhesive/sealing effect by pressing the folding sections moving towards one another firmly together under the influence of the compressive force. The packaging and/or shipping item can therefore be easily wrapped using the packaging material web. For example, it is not necessary to apply additional heat inputs and/or additional adhesive materials. The packaging material web according to the invention can significantly increase productivity when packaging items, such as packaging and/or shipping items. Furthermore, packaging material can be saved because there is no need to wrap the object to be protected multiple times. Furthermore, a length of the packaging material web measured in the longitudinal direction of the web can be flexibly coordinated and adjusted to the item to be packaged. Precisely because the packaging material web is designed as an endless roll and if the inside is provided with adhesive over the entire surface, this decisive inventive advantage can be used to be able to produce longer or shorter shipping bags. The length of the shipping bag depends on the length or size of the goods to be packed. Once the length of the packaging bag is defined, it can be formed by simply cutting the web of packaging material designed as roll goods to length. This means that shorter packaging bags can be produced, which correspond to a low price level of a shipping service provider, but longer shipping bags can also be produced without gradations, which meet the requirements of a shipping service provider. Such typical lengths are adapted to Euro pallets, for example, but are in principle adapted to the goods to be packaged, for example if bar goods with lengths of 1, 2, 3, 5 or 6 meters are packaged. Another advantage of the multi-layer structure according to the invention is that the packaging material web provides a good cushioning and therefore protective effect for the item to be packaged. A further advantage of the present invention is that the adhesive is easier to apply to the flat inner layer compared to a corrugated layer and the adhesion of the adhesive to the flat inner layer is also improved. Alternatively or in addition to the cold-sealable adhesive, other connection techniques are conceivable. For example, heat sealing comes into consideration as well as applying adhesive on site, i.e. sealing in-line. In addition, it is conceivable to use positive and/or frictional connection technologies, such as embossing, perforating or the like, in order to realize an interlocking and fixing fastening structure in the packaging material web. Furthermore, it is conceivable to use alternative or additional fastening aids, such as sewing with threads, ultrasound, welding with a PE coating, adhesive tapes or the like.

According to an exemplary embodiment of the packaging material web according to the invention, the adhesive coating is arranged on a surface of the inner layer facing away from the outer layer. This means that the adhesive coating faces the later interior of the packaging bag or the shipping item. According to an exemplary development of the present invention, the cushion layer has a particularly sinusoidal wave position. For example, the cushion layer is designed as a wave layer. A wave of the wave position can be oriented transversely, in particular perpendicularly, to the longitudinal direction of the packaging material web. Furthermore, it is possible for the padding layer to comprise paper, cardboard, cardboard or foam, such as PUR, in particular with a density of less than 90 kg/m3.

According to a further exemplary development of the present invention, the cushion layer has flake-like filling material and/or a foam, such as a PUR (polyurethane foam) or the like.

According to an exemplary embodiment of the packaging material web according to the invention, the material of the outer layer has a grammage in the range of 20 g/m ² to 40 g/m ² . In particular, the outer layer is a kraftliner paper, in particular with a grammage in the range from 50 g/m ² to 420 g/m ² , preferably in the range from 100 g/m ² to 130 g/m ² . Furthermore, the outer layer can be a testliner paper, in particular with a grammage in the range of 50 g/m ² to 130 g/m ² , preferably in the range of 100 g/m ² to 150 g/m ² . According to a further exemplary embodiment, the outer layer is a mixed soda paper, in particular with a grammage in the range from 20 g/m2 to 120 g/m2, preferably in the range from 40 g/ ^m2 to 70 g/ ^m2 . Furthermore, the outer layer can also be paper material with a grammage in the range of 40 g/m ² to 120 g/m ² , preferably in the range of 60 g/m ² to 70 g/m ² . According to an exemplary development, the outer cover layer consists of a material with a grammage in the range of 120 g/m ² to 130 g/m ² , preferably 125 g/m ² . What is important for the material of the outer layer is significant durability and/or tear resistance. According to a further exemplary embodiment of the present invention, the material of the inner layer has a grammage in the range from 20 g/m ² to 150 g/m ² . In particular, the inner layer is a paper with a grammage in the range from 50 g/m ² to 150 g/m ² , preferably in the range from 80 g/m ² to 120 g/m ² . Furthermore, it is possible for the inner layer to be a paper material with a grammage in the range from 40 g/m ² to 120 g/m ² , preferably in the range from 60 g/m ² to 70 g/m ² . According to an exemplary development, the inner layer is a mixed soda paper, in particular with a grammage in the range from 20 g/m ² to 120 g/m ² , preferably in the range from 40 g/m ² to 70 g/m ² .

According to an exemplary development of the packaging material web according to the invention, the material of the corrugated layer has a grammage in the range from 7 g/m ² to 150 g/m ² . In particular, the corrugated layer is a paper with a grammage in the range from 20 g/m ² to 120 g/m ² , preferably in the range from 50 g/m ² to 120 g/m ² , preferably in the range from 80 g/m ² to 120 g/ ^m2 .

According to a further exemplary embodiment of the present invention, the cushion layer is designed as a sinusoidal wave layer, in particular designed as an E-wave. For example, a wave height (amplitude) transverse to the longitudinal extent of the packaging material web is in the range from 0.5 mm to 5 mm, in particular in the range from 0.75 mm to 3 mm or in the range from 1.0 mm to 1.9 mm, and/ or a wave pitch (wavelength) transverse to the longitudinal direction and width direction of the packaging material web in the range from 1.0 mm to 10 mm, in particular in the range from 1.5 mm to 7.5 mm, in particular in the range from 2.0 mm to 5 mm or in the range of 2.6 mm to 3.5 mm.

In a further exemplary embodiment of the present invention, the cushioning layer is a recycled paper, in particular with a proportion of at most 50% or at most 70% of paper material containing fresh fibers. For example, the padding layer consists exclusively of recycled paper.

This E-wave formed in this way is particularly advantageous for packaging purposes, for example to label the packaging bag or to print any stickers or advertisements on it. Thanks to the E-wave, the packaging material web wound into a roll can be stored in a particularly space-saving manner, since it has been found that the roll diameter can be kept as small as possible while keeping the number of running meters on the roll as high as possible.

In an exemplary development of the packaging material web according to the invention, between the inner layer and the cushioning layer there is a sequence of an intermediate layer made of paper, cardboard or cardboard and one in particular designed in accordance with the cushioning layer, in particular sine wave-shaped, further cushioning layer made of paper, cardboard or cardboard arranged to form a sandwich structure so that the intermediate layer rests on the cushioning layer assigned to the outer layer and the further cushioning layer rests on the intermediate layer and on the inner layer. According to this construction principle, a desired stability and/or deformability can be created arbitrarily and in particular depending on the desired buffer properties, for example depending on the shipping item to be packaged.

According to a further exemplary development, the padding layer assigned to the outer layer differs from the padding layer assigned to the inner layer, in particular with regard to the type of wave, the wave height and / or the wave pitch. As a result, for example, the padding layer facing the inside of the packaging bag can be designed in such a way that the focus is on a high damping or buffering ability, while the focus can be on stability for the padding layer assigned to the outer layer. As a rule, the buffering ability is increased by increasing the wave height of the padding layer and/or the wave pitch. The stability is increased by reducing the wave height and/or the wave pitch of the padding layer.

According to a further aspect of the present invention, which can be combined with the preceding aspects and exemplary embodiments, a packaging material web is provided, which can be formed into a packaging bag for wrapping a shipping item, made of paper, cardboard or cardboard and with a coating of, in particular, cold-sealable adhesive.

According to the further aspect of the invention, the adhesive, in particular the cold-sealable adhesive, comprises natural rubber latex, a styrene-acrylate copolymer and preferably a defoamer. It has been found that an adhesive which comprises natural rubber latex, a styrene-acrylate copolymer and optionally a defoamer achieves excellent adhesive effects and is particularly advantageous for the packaging material webs and packaging bags according to the invention. By adding styrene-acrylate copolymer to the adhesive, the adhesion of the adhesive is significantly improved compared to a natural rubber latex-based adhesive without styrene-acrylate copolymer. Compared to natural rubber latex-based adhesives, which have other polymers instead of a styrene-acrylate copolymer, a natural rubber latex-based adhesive with a styrene-acrylate copolymer has the advantage that the adhesive has extremely high resistance. An adhesive which comprises natural rubber latex and a styrene-acrylate copolymer therefore has particularly advantageous properties in relation to application to packaging material webs or packaging bags. According to one embodiment, the adhesive, in particular a cold-sealable adhesive, can be present as an aqueous dispersion. An adhesive in the form of an aqueous dispersion is particularly suitable for application to webs of packaging material.

The adhesive, in particular a cold-sealable adhesive, for example a cold-sealable adhesive present as a dispersion, preferably has a pH of at least pH 8, more preferably of at least pH 9. A pH value of the adhesive of at least pH 8, preferably pH 9, can prevent components of the natural rubber latex from precipitating. The pH of the adhesive can optionally be adjusted to the desired pH, preferably at least pH 8, more preferably at least pH 9, by adding a base, for example ammonia. According to one embodiment, the adhesive contains a base, for example ammonia, and preferably has a pH of at least pH 8, more preferably pH 9.

According to one embodiment, the adhesive comprises a defoamer and optionally a further component selected from a wetting agent, a stabilizing agent, a base, an antiblocking agent, a UV tracer, an ethylene-vinyl acetate copolymer and a polyvinyl acetate. A defoamer may include, for example, a silicon-based compound such as emulsified silicone or silica, a wax, a mineral oil, a hydrocarbon, polyether, fatty acid-based compounds such as stearate, acylglycerols, glycol esters and/or polyol. The use of the adhesive can be made easier by using a defoamer, as the adhesive is prevented from foaming during use. It has been found that foaming the adhesive by a defoamer in an amount in a range of 0.2% by weight to 0.8% by weight, preferably in a range of 0.4% by weight to 0.6% by weight .%, can be effectively prevented. According to a preferred embodiment, the cold-sealable adhesive contains a defoamer in an amount in a range from 0.2% by weight to 0.8% by weight, preferably in a range from 0.4% by weight to 0.6% by weight. According to one embodiment, the adhesive comprises in a dried or non-dried dried state, preferably the adhesive in a non-dried state, defoamer in an amount in a range from 0.2% by weight to 0.8% by weight, preferably in a range from 0.4% by weight to 0.6 wt.%.

According to one embodiment, the adhesive comprises a wetting agent. A wetting agent reduces the interfacial tension between two phases and can support the formation of dispersions. A wetting agent may include a nonionic wetting agent, an anionic wetting agent, a cationic wetting agent and/or an amphoteric wetting agent, preferably a nonionic wetting agent and/or an anionic wetting agent. A wetting agent can include, for example, fatty acid esters, fatty alcohol ether sulfates, fatty alcohol polyglycol ethers, fatty alcohol sulfates, alkyl sulfosuccinates, alkyl sulfosuccinamates, alkyl benzene sulfates, fatty alcohol ether phosphates and/or alkyl aryl ether sulfates. It has been found that an adhesive with a wetting agent can be distributed particularly evenly on the packaging material web. According to one embodiment, the adhesive has a wetting agent in an amount ranging from 0.0% by weight to 3% by weight.

According to one embodiment, the adhesive can contain a UV tracer. A UV tracer can be made visible under UV irradiation and can be used, for example, to detect coated surfaces, for quality control and/or for (cutting) position detection be used when producing the packaging material web or the packaging bag. For example, UV-fluorescent additives can be used as UV tracers. According to one embodiment, the adhesive has a UV tracer in an amount ranging from 0.0% by weight to 1% by weight.

According to a preferred embodiment, the packaging material web is designed with a coating, for example with a coating of the inner layer on the inside of the packaging bag, the coating containing the adhesive in an amount in a range of 2 g/m ² to 20 g/m ² , preferably 10 g/m ² up to 12 g/m ² . According to one embodiment, the coating comprises the adhesive in an amount in a range of 2 g/m ² to 20 g/m ² , preferably 10 g/m ² to 12 g/m ² , wherein the adhesive is in a dried state or in a non-dried state, preferably in a dried state. An adhesive in a dried state is a dried adhesive that can be obtained by drying, for example by oven drying, the adhesive, in particular the adhesive applied to the packaging material web. According to one embodiment, the adhesive is in the dried state in the form of solid particles. An adhesive in a non-dried state is a non-dried adhesive which has a water content in a range of 30% by weight to 70% by weight and is preferably present as a dispersion. According to the invention, a coated surface of the packaging material web, for example a surface of the inner layer coated on the inside of the packaging bag, can contain an amount of adhesive in a range of 2 g/m ² to 20 g/m ² , preferably 10 g/m ² to 12 g/m ² on the coated surface. According to one embodiment, the amount of adhesive in a range from 2 g/m ² to 20 g/m ² , preferably 10 g/m ² to 12 g/m ² , relates to a dried state of the adhesive, ie to the solid particles of the adhesive. The adhesive is preferably applied evenly over the coated surface in order to increase the adhesive strength of the adhesive connections. According to one embodiment, the adhesive can have a water content in a range of <10% by weight or 30% by weight to 70% by weight, preferably in a range of <10% by weight or 40% by weight to 60% by weight. It has been found that an adhesive with a water content of 30% by weight to 70% by weight, in particular 40% by weight to 60% by weight, can be applied particularly well to webs of packaging material. After applying the adhesive to the packaging material web, the adhesive can optionally be dried, resulting in a water content of <10% by weight. An adhesive with a water content of <10% by weight has a particularly high storage stability. An adhesive applied to the packaging material web in a dried state has a water content of <10% by weight, preferably <5% by weight. An adhesive applied to the packaging material web in a non-dried state has a water content of 30% by weight to 70% by weight, preferably 40% by weight to 60% by weight. A packaging material web with dried and/or non-dried adhesive has excellent adhesive properties and is suitable for forming into a packaging bag.

According to an exemplary development of the packaging material web according to the invention, the packaging material web has a plurality of transverse strips which are oriented transversely, in particular perpendicularly, to the longitudinal direction of the web and/or arranged at an equidistant distance from one another and which are provided with a cold-sealable adhesive. The cold-sealable adhesive can be applied in the same way as for the longitudinal edge strip. Due to the transverse strips evenly distributed in the longitudinal direction of the web, the packaging material web can be closed and/or glued both to the longitudinal edge strip and to the transverse strip to form a closed casing, in particular a packaging bag. For example, the distance between the horizontal strips can be dimensioned in accordance with a standardization for shipping packages, for example a DHL package.

In a further exemplary embodiment of the packaging material web according to the invention, the transverse strips each open into at least one, preferably both, longitudinal edge strips. For example, the packaging material web can have a repeating pattern, repeat or grid of longitudinal edge and transverse strips provided with cold-sealable adhesive, the pattern having rectangular, in particular square, adhesive windows which form the pattern or grid. It can therefore be provided that the packaging material web between the longitudinal edge and transverse strips is essentially free of the cold-sealable adhesive, particularly over the entire area. The pattern or repeat can either form uniformly or change in the longitudinal direction of the web, whereby the patterns or repeats can be dimensioned in such a way that they are also items of a predetermined size and/or coordinated with respect to standardized sizes, for example of a DHL package.

In a further exemplary embodiment of the present invention, the transverse strips, in particular in the area of at least one longitudinal edge strip, in particular on the corresponding longitudinal edge, are provided with an indicator for displaying the respective cross section. The indicator simplifies the production of a packaging material blank from which, for example, a packaging bag can be created and/or a packaging bag. The indicator can be, for example, a weakening of the material, in particular a perforation or an indentation from the outside, or a color marking. The indicator can be designed to be detectable so that automated production and packaging is possible or simplified. The indicator enables a precise and length-specific packaging process for items that may have different sizes. According to one embodiment, the indicator can be a UV tracer contained in the adhesive. According to a further aspect of the present invention, which can be combined with the preceding aspects and exemplary embodiments, a packaging bag for enveloping a shipping item is provided, which is formed by forming, such as folding, a packaging material web designed according to one of the preceding claims and, if necessary, cutting it to length, such as cutting it off a blank of suitable dimensions is formed by the packaging material web.

In an exemplary embodiment of the packaging bag according to the invention, it has a dimension in the range from 30 mm to any, in particular up to 350 mm, (length in the longitudinal direction of the web) x 50 mm to 1000 mm (width transverse to the longitudinal direction of the web) x 1 mm to 200 mm (depth transverse to the longitudinal direction and to the width direction). For example, the packaging bag is the size of the post office's maxi letter, namely approximately 353 mm x 250 x 50 cm.

According to a further exemplary embodiment, at least one edge forming an edge of the packaging bag, in particular two edges lying one on top of the other, is formed by cutting, in particular cutting, the packaging material web, in particular by means of a rotary or guillotine cutting knife.

In an exemplary development, the cut edge, in particular the cut edge, is slightly frayed or frayed and/or is so blunt that the packaging bag can be manipulated by hand on the cut edge without injury. In particular, the shape of the cut edge results from the shape of the cutting device used, in particular its cutting bar or knife. The cut edge can be wavy, jagged, frayed, etc. In particular, the cutting edge is slightly serrated, analogous to the toothed strip, and in particular the protruding tooth tips of the cardboard are slightly frayed. This means that the cut edge or the edge of the cardboard is not sharp/razor-sharp, but rather a blunt, slightly frayed cut edge remains so that a user does not cut themselves. According to a further exemplary development of the packaging bag according to the invention, the adhesive coating is designed and in particular applied to the entire surface of the inner layer in such a way that movement of an article arranged in the packaging bag relative to the inner layer is impaired.

In a further exemplary embodiment of a packaging material web according to the invention or a packaging bag according to the invention, the packaging material web has a marking or weakening that indicates an opening and/or tearing aid. For example, the cut-to-length edge has a marking or weakening that is clearly visible to the user or the shipping recipient, which is designed as an opening and tearing aid and extends, starting from the edge, across the sealed and The cut edge of the packaging bag extends towards the bag. For example, the marking or weakening is formed by an incision. Alternatively, the marking or weakening can also be designed as a U- or V-shaped cutout. Furthermore, several markings or weakenings, for example two, can also be provided, which are at a distance of up to 20 millimeters from one another. A cutout is typically up to five millimeters wide and, like the incision, measures an incision length of up to 20 millimeters. Furthermore, the incision or cutout extends essentially in the longitudinal direction of the packaging material web. Alternatively, it extends at an acute angle of up to 25 degrees relative to the longitudinal direction of the packaging material web.

Furthermore, adjacent, adjacent and/or congruent to an incision or cutout of the packaging bag, the packaging material web can be provided with a thread-like web made of a material that is stronger than the packaging material web, such as plastic, yarn, kraft paper or the like, which extends in the longitudinal direction of the entire packaging material web and which therefore extends over the entire length of the packaging bag. As an alternative to the thread-like web, the packaging material web instead has a type of material weakening such as creasing or perforation. When the cut edge is pulled against the marking on both sides and against each other, the packaging bag is torn open with reduced force. When using a thread-like web, a crease or a perforation, there is a simplified tearing along this web, crease or perforation, which makes the packaging bag easier to open.

A special feature can be achieved in terms of process engineering in that the marking or weakening is only introduced into the packaging material web or packaging bag, in particular into the edge of the bag, after the shipping goods have been introduced and the packaging bag has been closed.

Preferred embodiments are specified in the subclaims.

Further properties, features and advantages of the invention will become clear below by describing preferred embodiments of the invention with reference to the accompanying exemplary drawings, in which:

Figure 1: a schematic perspective view of an exemplary embodiment of a packaging material web according to the invention;

Figure 2: a schematic perspective view of a further exemplary embodiment of a packaging material web according to the invention; Figure 3: a schematic side view of the packaging material web from Figure 1; and

Figure 4: a schematic detailed section of a shaft position according to the invention

Packaging material web.

In the following description of exemplary embodiments of packaging material webs according to the invention, which are generally provided with the reference number 1, the exemplary embodiments of the packaging material webs 1 according to the invention are fundamentally to be understood as a multi-layer sandwich structure made up of several layers of material webs made of paper, cardboard and/or cardboard suitable for packaging purposes , which are selected in an arrangement suitable for packaging purposes, in particular for providing a good damping function while at the same time providing good deformability of the packaging material web to form the desired packaging bag for wrapping a shipping item.

All exemplary embodiments of packaging material webs 1 according to the invention are characterized, on the one hand, by an alternating arrangement of flat layers, for example made of cardboard, paper or cardboard and cushioning and / or cushioning layers, in particular made of cardboard, cardboard or paper, and in that the layers forming the top and bottom are each realized by flat layers of material. A further characteristic feature of the packaging material webs according to the invention is that a flat material layer forming the top or bottom is coated at least in sections with a particularly cold-sealable adhesive, which closes the packaging bag by forming the packaging material web into a closed casing and activating the adhesive.

According to the exemplary embodiment according to Figure 1, the packaging material web 1 according to the invention comprises an outer layer 3 forming an outside of the packaging bag to be formed, for example made of paper, cardboard or cardboard, in particular with a grammage in the range of 20 g/m ² to 420 g/m ² , preferably a kraftliner paper, in particular with a grammage in the range of 50 g/m ² to 420 g/m ² , a particularly sine wave-shaped cushioning layer, for example made of paper, cardboard or cardboard, in particular with a grammage in the range, which lies against the outer layer 3 and is designed as a wave layer 5 from 7 g/m ² to 150 g/m ² , preferably a paper with a grammage in the range from 20 g/m ² to 120 g/m ² , and an inner layer 7 resting against the corrugated layer 5 and forming an inside of the packaging bag to be formed for example made of paper, cardboard or cardboard, in particular with a grammage in the range of 20 g/m ^{2 -} 150 g/m ² , preferably a paper with a grammage in the range of 50 g/m ² to 150 g/m ² . The inner layer 7 is on the inside of the packaging bag, ie on its side facing away from the outer layer 3 and facing the inside of the packaging bag Surface coated with a particularly cold-sealable adhesive, which is indicated by the reference number 9.

2 shows a further exemplary embodiment of a packaging material web i according to the invention, which is based on the same basic principle of the packaging material web i from FIG. 1, but has additional layers: Between the inner layer 7 and the corrugated layer 5 is a sequence of an intermediate layer 11 made of paper, cardboard or Cardboard, which can preferably be designed analogously to the inner layer 7, and a further corrugated layer 13 made of paper, cardboard or cardboard, which is designed in particular according to the corrugated layer 5 and/or made from the same material, in particular sine wave-shaped, is arranged in such a way to form a sandwich structure that the intermediate layer 11 rests on the corrugated layer 5 assigned to the outer layer 3 and the further corrugated layer 13 rests on both the intermediate layer 11 and the inner layer 7. Using this construction principle, any sandwich structures can be produced from packaging material webs according to the invention and adapted to the need for buffering ability, damping ability, stability and/or deformability depending on the shipping item.

In Figure 3, the packaging material web 1 according to Figure 1 is shown in side view and the adhesive layer 9 is indicated. It should be clear that the solid line with the reference number 9, which represents the adhesive layer, is only intended to indicate and clarify schematically the position or application of the adhesive layer 9, but is not to be understood to scale, in particular with regard to a layer thickness of the adhesive 9.

4 shows the characterization and the design freedom when producing and designing the wave layers 5 and 13, which in the preferred embodiments are each formed as uniform, sine wave-shaped E waves. The selected E-waves are characterized, among other things, by the fact that a wave height h oriented transversely to the longitudinal extent L of the packaging material web 1 is in the range of 1.0 mm to 1.9 mm and one transverse to the longitudinal extent L and transverse to the height direction H in the width direction B Rated shaft pitch t is in the range from 2.6 mm to 3.5 mm. This E-wave formed in this way has proven to be particularly advantageous for packaging purposes. It has a low overall height and is very flat overall, has a high level of strength, has good damping properties for absorbing and buffering impacts to protect the goods inside the shipping bag and is easy to form, so that the aforementioned folding and stacking can be easily created by moving the folding sections. Another advantage is that the E-wave can be printed very well, for example to label the packaging bags or add any stickers or advertising. Further The storage of a packaging material web roll of a shaft layer 5, 13 can thereby be optimized, since the roll diameter can be kept as low as possible with the highest possible number of linear meters on the roll, which saves space.

In addition to the advantages of the E-wave, other waves are also conceivable, which can be used depending on the requirements for the shipping bag and/or the packaging material web. As an alternative to the E-wave, the even flatter F-wave or the higher D-wave, B-wave or C-wave are preferably used. The F-wave has different damping properties and the structurally-related higher waves in particular have a higher damping property. The wave position 5, 13 has alternating mountains 15 and valleys 17, which, according to the preferred embodiments, are evenly distributed in the width direction B and always have the same wave height. Referring again to Figure 2, it can be seen that the wave position 13 assigned to the inner layer 7 has a smaller wave pitch t, but a higher wave height h than the wave position 5 assigned to the outer layer 3. That disclosed in the above description, the figures and the claims Features can be important for the implementation of the invention in the various embodiments both individually and in any combination.

REFERENCE SYMBOL LIST

1 strip of packaging material

3 outer layer

5 wave position

7 inner layer

9 Adhesive ii Interlayer

13 wave position

15 wave crest

17 wave trough

L longitudinal direction

B width direction

H height direction h wave height t wave pitch

Claims

EXPECTATIONS

1. Packaging material web (i), which can be formed into a packaging bag for wrapping a shipping item, comprising an outer layer (3), an inner layer (7) and a padding layer (5) arranged between the outer layer (5) and the inner layer (7), wherein at least one layer comprises paper, cardboard or cardboard, characterized in that the inner layer (7) is at least partially provided with a particularly cold-sealable adhesive coating (9).

2. Packaging material web (1) according to claim 1, characterized in that the adhesive coating (9) is arranged on a surface of the inner layer (7) facing away from the outer layer (3).

3. Packaging material web (1) according to claim 1 or 2, characterized in that the cushion layer (5) has a particularly sinusoidal wave position, in particular is designed as a wave position, in particular a wave of the wave position (5) transversely, in particular perpendicular, to the longitudinal direction of the Packaging material web (1) is oriented, and / or is made of paper, cardboard, cardboard or foam, in particular with a density of less than 90 kg / nU.

4. Packaging material web (1) according to claim 1 or 2, characterized in that the cushion layer (5) has flake-like filling material and / or a foam, such as a PUR (polyurethane foam) or the like.

5. Packaging material web (1) according to one of the preceding claims, characterized in that the material of the outer layer (3) has a grammage in the range of 20 g / m ² to 420 g / m ² , in particular the outer layer (3) being a kraft liner -Paper in particular with a grammage in the range of 50 g/m ² to 420 g/m ² , preferably in the range of 100 g/m ² to 130 g/m ² , or a testliner paper in particular with a grammage in the range of 50 g/m ² to 230 g/m ² , preferably in the range of 100 g/m ² to 150 g/m ² . Packaging material web (i) according to one of the preceding claims, characterized in that the material of the inner layer (7) has a grammage in the range of 20 g/m ² to 150 g/m ² , in particular the inner layer (7) having a paper in particular a grammage in the range from 50 g/m ² to 150 g/m ² , preferably in the range from 80 g/m ² to 120 g/m ² . Packaging material web (1) according to one of the preceding claims, characterized in that the material of the cushioning layer (5) has a grammage in the range of 20 g/m ² to 150 g/m ² , packaging material web (1) according to one of the preceding claims, characterized characterized in that the cushion layer (5) is designed as a sinusoidal wave layer, in particular a wave height (h) (amplitude) in the range of 0.5 mm to 5.0 mm and / or a wave pitch (t) (wavelength) in the range of 1.0 mm to 10 mm. Packaging material web (1) according to one of the preceding claims, characterized in that the cushioning layer (5) comprises recycled paper, in particular with a proportion of at most 50% or at most 70% of paper material containing fresh fibers, in particular the cushioning layer (5) consists of recycled paper. Packaging material web (1) according to one of the preceding claims, characterized in that between the inner layer (7) and the cushioning layer (5) there is a sequence of an intermediate layer (11) made of paper, cardboard or cardboard and a further cushioning layer designed in particular in accordance with the cushioning layer ( 13) is arranged to form a sandwich structure in such a way that the intermediate layer (11) rests on the padding layer (5) assigned to the outer layer (3) and the further padding layer (13) rests on the intermediate layer (11) and on the inner layer (7 ). Packaging material web (1) according to claim 10, characterized in that the padding layer (5) assigned to the outer layer (3) differs from the padding layer (13) assigned to the inner layer (7), in particular with regard to the type of wave, the wave height (h) and / or the Wave pitch (t) differs. Packaging material web (i), in particular according to one of the preceding claims, which can be formed into a packaging bag for wrapping a shipping item, made of paper, cardboard or cardboard and with a coating of, in particular, cold-sealable adhesive, characterized in that the adhesive (9) is natural rubber latex Styrene-acrylate copolymer and preferably a defoamer, wherein the adhesive (9) preferably has a pH of at least pH 8, more preferably of at least pH 9. Packaging material web (1) according to claim 9, characterized in that the adhesive (9) has at least one further component selected from a wetting agent, a stabilizing agent, a base, an anti-blocking agent, a UV tracer, an ethylene-vinyl acetate copolymer and a polyvinyl acetate , includes. Packaging material web (1) according to one of the preceding claims, characterized in that the coating contains the adhesive (9) in an amount in a range of 2 g/m ² to 20 g/m ² , preferably 10 g/m ² to 12 g/ m ² covers. Packaging material web (1) according to one of the preceding claims, characterized in that the adhesive (9) contains the defoamer in an amount in a range of 0.2% by weight to 0.8% by weight, preferably in a range of 0.4 Contains wt.% to 0.6 wt.%. Packaging material web (1) according to one of the preceding claims, characterized in that the adhesive (9) has a water content in a range of <10% by weight or 30% by weight to 70% by weight, preferably in a range of

<10% by weight or 40% by weight to 60% by weight. Packaging bag for wrapping a shipping item, which is formed by forming a packaging material web (1) designed according to one of the preceding claims. Packaging bag according to claim 17 with a dimension in the range from 30 mm to in particular 350 mm (length) x 50 mm to 1000 mm (width) x 1 mm to 200 mm (depth). Packaging bag according to claim 17 or 18, wherein at least one edge forming an edge of the packaging bag, in particular two edges lying one on top of the other, is formed by cutting the packaging material web (1) to length, in particular by means of a rotary or guillotine knife. Packaging bag according to one of claims 17 to 19, wherein the cut edge, in particular the cut edge, is slightly frayed or frayed and / or is so blunt that the packaging bag can be manipulated by hand on the cut edge without injury. Packaging bag according to one of claims 17 to 20, wherein the adhesive coating (9) is designed and in particular is applied over the entire surface of the inner layer (7) in such a way that movement of an article arranged in the packaging bag relative to the inner layer (7) is impaired.