Packaging material web and packaging bag

Abstract

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

Description

[0001] 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 items, especially shipping goods, and 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, especially corrugated board, or carton.

[0002] WO 2005 / 080519 A1 discloses a packaging material web and a packaging bag made therefrom for packaging foodstuffs. The packaging material web has longitudinal edge strips extending parallel to the longitudinal edges, which are coated with a cold-sealable adhesive. Furthermore, the packaging material web has transverse strips extending perpendicular to the web's longitudinal direction, also coated with a cold-sealable adhesive. To form a packaging bag, the packaging material web is cut along the transverse adhesive strips, folded around the respective item, and sealed by means of the adhesive edge strips in both the longitudinal and transverse directions, thus completely enclosing the item within the packaging material web.

[0003] The packaging web or packaging bag according to WO 2005 / 080519 A1 has proven disadvantageous because a relatively large amount of force is required to fold the packaging web and wrap it around the article to form a closed packaging bag. Furthermore, it has been found to be a disadvantage that the packaging web, and in particular the packaging bag, only adapts to certain article sizes. A simpler packaging web that requires less force to process and can be more precisely adapted to different article sizes is known from DE 10 2020 114 211 A1 of the applicant. This packaging web consists, for example, of corrugated cardboard and is coated with a cold-sealable adhesive.Furthermore, several folding hinges oriented in the longitudinal direction of the web are incorporated into the packaging material web, along which the packaging material web can be easily folded around the item to be packaged.

[0004] This type of packaging material web is generally very popular. However, it has become apparent that there is potential for optimization regarding cushioning properties, adhesive application, and pocket forming.

[0005] 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 adhesive application and / or the pocket forming is facilitated.

[0006] The problem is solved by the subject matter of the independent claims.

[0007] A packaging material web is then provided that can be formed to wrap a shipping item. The packaging material web according to the invention has a multi-layered structure. The different layers can be bonded together using various fastening techniques, such as embossing or gluing. The individual layers can consist of paper, cardboard, or carton. According to DIN 6730, paper is characterized by having a basis weight in the range of 7 to 225 g / m². 2 Cardboard with a basis weight of 226 g / m² or higher 2 and cardboard, according to general use, has a basis weight between 150 and 600 g / m². 2 exhibits.

[0008] The layers of the packaging material web can be made of paper, such as recycled paper, in particular waste paper, and / or 100% recyclable paper, which may be produced without chemical additives. Recycled paper is, in particular, paper materials with a low proportion (less than 50%) of virgin fiber paper. For example, paper materials containing 70% to 100% waste paper are used. The recycled paper within the meaning of this invention can be paper material that has 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 transverse to the machine direction of at most 60 Nm / g, preferably a tensile strength of 5 Nm / g to 40 Nm / g. The tensile strength and the tensile strength index can be determined according to DIN EN ISO 1924-2 or DIN EN ISO 1924-3.Alternatively, or in addition, the properties of recycled or waste paper can be characterized by its burst resistance. A material in this sense is recycled paper with a burst index of no more than 3.0 kPa*m. 2 / g, preferably with a burst index of 0.8 kPa*m 2 / g to 2.5 kPa*m 2 The burst index is determined according to the standard DIN EN ISO 2758. Furthermore, the packaging material has a basis weight of, in particular, 40 g / m² to a maximum of 140 g / m². The starting packaging material can be in the form of a roll of material or a zigzag-folded stack of packaging material, also known as a leporello stack.

[0009] Within the scope of the present invention, a suitable paper grade is used for each layer of the packaging material web, depending on the packaging requirements. The packaging material web itself, i.e., its structure and number of layers, is thus adaptable to the specific paper grade used. Each layer can be single-layered or multi-layered.

[0010] Furthermore, paper, cardboard, and / or carton can be used for the packaging material web. Other materials made of plastic, such as polyurethane foam or similar substances that can be applied to a surface, can also be used. The packaging material web is universally and flexibly designed and adaptable to the specific requirements and application. This also applies to the number and structure of each layer.

[0011] If paper is used to design the packaging material web, it has a basis weight in the range of 30 g / m². 2 up to 225 g / m² 2 The paper can be flat and can also be used as a liner. Alternatively, it can be three-dimensional, such as corrugated. Furthermore, the paper can be designed as a test liner. Preferably, it is designed as a kraft liner. The paper itself is formed as a layer and can have one or more layers.

[0012] If cardboard is used to design the packaging material web, it has a basis weight of more than 225 g / m². 2Depending on the amount of mass per unit area, the cardboard can also be flat. Within the scope of design freedom for the packaging material web, the cardboard can also be used as a liner. However, compared to the paper mentioned earlier, the cardboard itself is preferably three-dimensional or shaped, for example, corrugated. The cardboard itself is also formed as a single layer or multiple layers and can have one or more layers.

[0013] If a cardboard box is used to form the packaging material web, it is preferably multi-layered. In a first embodiment of the cardboard box, it is made of at least two layers of paper. Another embodiment of the cardboard box provides for a number of layers of paper and / or cardboard, with the cardboard box having at least two layers in this embodiment. The basis weight of the cardboard box can range from 150 g / m².2 up to 600 g / m² 2 be called.

[0014] In the context of the present invention, the following types of paper are used in particular: Kraftliner is a linerboard made from unbleached or bleached kraft pulp. Due to the use of virgin fibers, it has a strong fiber-to-fiber bond, resulting in excellent strength properties. Kraftliner papers have high tear resistance and are therefore suitable for packaging with high strength requirements.

[0015] Testliner is a two-ply recycled linerboard made from 100% post-consumer recycled paper. Depending on its strength, testliner is classified as TL1-TL3. Due to its fiber composition, the tear strength of this paper is lower than that of kraftliner. However, its stiffness properties are comparable. Because testliner papers must also meet specific quality standards, only certain types of post-consumer recycled paper (e.g., corrugated board waste) are used in its production. Testliner is more cost-effective than kraftliner and, thanks to the recycled fibers, makes a significant contribution to environmental protection. Testliner is particularly suitable for packaging with medium strength requirements, serving as both the inner and outer liner of corrugated board.

[0016] Sodium kraft papers are substitutes for kraft papers in low basis weights. These are now only produced from high-quality recycled paper (kraft paper). N2 has lower strength values ​​than NM.

[0017] Kraftliner white lined is a two-ply linerboard. It combines the excellent strength properties of a brown kraftliner with the good printability of a white kraftliner. Its two-ply construction results in good strength properties (plywood effect). This paper is particularly suitable when high demands are placed on both printability and strength.

[0018] To fill the spaces between the fibers of a paper surface and cover the entire fiber layer, applying a coating may be necessary. This coating gives the paper a higher surface quality, making it suitable for high-quality printing. However, the applied ink film (especially in multi-color halftone prints) is relatively sensitive to mechanical stress and therefore must be sealed with an overprint varnish for optimal protection against abrasion.

[0019] This paper is particularly suitable when, in addition to high strength requirements for the packaging, very high demands are also placed on the surface quality and printing results.

[0020] Testliner white is a multi-layered linerboard made primarily from recycled fibers. For the white top layer, mainly white waste papers are used (e.g., printing papers, hygiene papers, etc.). The structure of Testliner white coated is identical to that of Testliner white. As with Kraftliner, a coating is applied to enhance the surface.

[0021] The strength properties of these two papers are lower than those of white coated Kraftliner or white coated Kraftliner due to the recycled paper fibers used.

[0022] This paper has a brown kraft liner backing with a thin, cloudily bleached layer.

[0023] A layer of cellulose is covered. The brown kraft liner showing through the bleached cellulose layer creates the flamed effect (marble effect). The strength and processing properties are approximately the same as those of brown kraft liner.

[0024] The same applies to this paper as to Kraftliner white flamed, however, the paper layers here are made from recycled paper.

[0025] While linerboard is typically a high-density paper that determines certain strength properties and the appearance of the corrugated board, corrugated board itself must meet different requirements. Corrugated board has a lower density, is bulky, and must be easily embossed. In its fully formed state, it should possess high stiffness.

[0026] Fluting paper is a type of corrugated paper made primarily from virgin fibers. The term "semi-chemical pulp" refers to the semi-chemical and semi-mechanical pulping process used to process the fibers. A chemical process first partially removes undesirable components of the wood, such as resin or lignin, which are not suitable for papermaking. This is then followed by a mechanical post-treatment (fiber removal).

[0027] Semi-chemical papers, when fully formed, exhibit high stiffness and are therefore particularly suitable as corrugated board for packaging subjected to high stacking loads (stacking compression resistance). Due to their high stiffness (brittleness), processing them is more difficult than with corrugated board.

[0028] Corrugated board is a type of corrugated paper made from recycled paper. Its strength and stiffness properties are 20% to 30% lower than those of semi-chemical pulp. The difference between corrugated board and Schrenz lies in the sizing process. A thin film of starch is applied to the paper during the manufacturing process.

[0029] Since corrugating materials, like testliner papers, are predominantly made from recycled paper, their share, together with Schrenz and Schrenz duplex papers, has now risen to over 70% of paper usage in the corrugated board industry. With this high proportion of recycled paper, the German corrugated board industry has been making a significant contribution to conserving our raw materials and protecting the environment for many years.

[0030] The packaging material web extends in a longitudinal direction and can have a constant web / material thickness and / or a constant width when viewed transversely to the web's longitudinal direction. In the lateral direction, the packaging material web terminates at a longitudinal edge or border extending in the web's longitudinal direction. For example, the packaging material web has a width of at least 200 mm and, in particular, at most 2,000 mm. For example, the width is approximately 500 mm.

[0031] The packaging material web according to the invention comprises an outer layer, an inner layer, and a cushioning layer arranged between the outer layer and the inner layer. At least one layer comprises paper, cardboard, or carton.

[0032] The outer layer facing the environment can form the outside of the packaging bag and may consist of, for example, paper, cardboard or carton.

[0033] The inner layer facing the environment can form the inside of the packaging bag and may consist of paper, cardboard or carton.

[0034] The cushioning layer lies between the outer and inner layers, perpendicular to the web plane. It can be in contact with, or even attached to, both the inner and outer layers, thus preventing relative movement between them. The packaging web therefore has a sandwich or multi-layered structure. The cushioning layer is flexible and damping, particularly perpendicular to the web direction, and / or serves to absorb shocks or impacts that may affect the packaging and the packaging web, for example, during logistics or transport. It protects the goods inside the packaging from mechanical damage, especially external impacts. This flexible and damping cushioning layer can be constructed in various ways. For example, it can be corrugated.It is essential that the damping or pole structure extends outwards from the web plane, particularly perpendicular to the packaging material web, and thus exhibits a significant three-dimensional extent. For example, the corrugated structure features a multitude of ridges or cells, which are spaced at regular intervals and extend along the plane in the longitudinal and / or transverse direction of the packaging material web. This spatial structure is also produced from originally flat paper or cardboard through forming or shaping.

[0035] Each of the aforementioned spatial structures is designed as a layer due to its flexibility and damping capacity for absorbing shocks or impacts and is preferably made of paper or cardboard. In a further development 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.

[0036] If the packaging material web is single-layered, it can be made of paper or cardboard with a basis weight of more than 200 g / m². 2This single-layer packaging material web has both an outer and an inner surface. Furthermore, this packaging material web is designed to be inherently flexible and damping. While the flexibility and damping capacity are very low, it has been found that such a degree of flexibility and damping is sufficient for particularly simple packaging requirements.

[0037] Furthermore, some special features of the outer layer should be mentioned. This layer can be multi-layered, with the outer surface of the outer layer, which forms the outer surface of the packaging, being coated, at least in sections, to provide particularly good adhesion for stickers or shipping labels. The coating can also be designed to improve the adhesion of printed designs. Alternatively, the outer surface of the outer layer itself can be a high-energy, polar, or olefinic surface designed to receive and firmly adhere to printed designs and / or stickers. Alternatively, the outer layer, or an outer layer associated with it, can be designed as a printable layer.

[0038] Furthermore, some special features of the inner side should be mentioned. This is located on the side opposite the outer side of the packaging material and has the adhesive on its surface. Depending on the surface properties or the choice of material used, the inner side may first be coated with an adhesive carrier before the adhesive itself is applied.

[0039] The packaging bag according to the invention, which can be produced from the packaging material web, comprises an outer layer of the outer layer forming the packaging bag made of paper, cardboard or carton.

[0040] Furthermore, the arrangement of the flexible or damping layer should be mentioned if it is wave-shaped or sinusoidal. The wave shape itself extends transversely to the longitudinal direction of the packaging material web and is thus aligned parallel to the central longitudinal axis of a roll when the packaging material web is wound as a roll-forming web and prepared for the production of shipping bags.

[0041] In an advantageous embodiment, the adhesive is applied to the entire surface of the inner layer. Since the packaging material web is designed as a continuous web, packaging bags of various lengths can be produced by making the web cuttable. The length of the packaging bag extends along the longitudinal direction of the packaging material web, and because the inner layer of the packaging material web is fully coated with adhesive, adhesive is always present both inside the packaging bag and at the bonding surfaces. The adhesive itself has anti-slip properties, so that the goods inside the packaging bag are practically fixed in place by a high degree of friction and do not slip during transport.If several items are contained within the packaging bag, applying the adhesive to the entire inner layer effectively fixes them in place, preventing them from bumping against each other during transport. This advantageously eliminates the need for additional padding or filling within the packaging bag.

[0042] The cold-sealable adhesive is capable of creating a permanent bond between the surfaces of packaging materials. The cold-sealable adhesive, and in particular the bond between two surfaces achieved by means of the cold-sealable adhesive, can be characterized by the fact that the bond cannot be undone without causing damage. Furthermore, the cold-sealable adhesive can be characterized by the fact that the longitudinal edge strips coated and bonded with the cold-sealable adhesive cannot be peeled or removed from each other without damaging or destroying the packaging material to be bonded, in particular paper or cardboard, especially corrugated board. According to one embodiment, the adhesive is a natural rubber latex-based adhesive, i.e., an adhesive that contains natural rubber latex.The cold-sealable adhesive can, for example, comprise latex and a styrene-acrylate copolymer, and optionally a defoamer of 0.4% to 0.6%. The adhesive solids content can be, for example, 50% ± 10%, with the remainder being water. The cold-sealable adhesive can be applied, for example, by rollers (i.e., by roller application, which can be made of rubber, brass, or copper), by spraying, or by paint spraying onto at least one longitudinal edge strip. For example, the cold-sealable adhesive is an aqueous dispersion based on natural latex. Commercially available cold-sealable adhesives can be used.

[0043] According to a preferred embodiment, the adhesive, in particular the cold-sealable adhesive, comprises natural rubber latex, a styrene-acrylate copolymer, and preferably an antifoaming agent. It has been found that an adhesive comprising natural rubber latex, a styrene-acrylate copolymer, and optionally an antifoaming agent achieves excellent adhesive properties and is particularly advantageous for the packaging material webs and packaging bags according to the invention. The addition of styrene-acrylate copolymer to the adhesive significantly improves its adhesion compared to a natural rubber latex-based adhesive without styrene-acrylate copolymer. Compared to natural rubber latex-based adhesives that contain other polymers instead of a styrene-acrylate copolymer, a natural rubber latex-based adhesive with a styrene-acrylate copolymer has the advantage of exhibiting extremely high durability.An adhesive comprising natural rubber latex and a styrene-acrylate copolymer therefore exhibits particularly advantageous properties with regard to application on packaging material webs or packaging bags.

[0044] The adhesive, particularly cold-sealable adhesives, can be formulated as an aqueous dispersion. An adhesive in the form of an aqueous dispersion is especially well-suited for application to packaging material webs.

[0045] The adhesive, in particular a cold-sealable adhesive, for example a cold-sealable adhesive in dispersion form, preferably has a pH value of at least pH 8, more preferably at least pH 9. A pH value of at least pH 8, preferably pH 9, prevents the precipitation of components of the natural rubber latex. The pH value of the adhesive can optionally be adjusted to the desired pH value, 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 value of at least pH 8, more preferably pH 9.

[0046] 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, an ethylene-vinyl acetate copolymer, and a polyvinyl acetate. The adhesive may contain one or more of the further components. For example, the adhesive may comprise 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, such as a wetting agent, a base, and a UV tracer.

[0047] 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. An defoamer may, for example, comprise 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 application of the adhesive can be facilitated by the use of a defoamer, as it prevents foaming of the adhesive during application. It has been found that foaming of the adhesive can be effectively prevented by an amount of defoamer in the range of 0.2 wt.% to 0.8 wt.%, preferably in the range of 0.4 wt.% to 0.6 wt.%.According to a preferred embodiment, the cold-sealable adhesive contains an antifoaming agent in an amount in the range of 0.2 wt.% to 0.8 wt.%, preferably in the range of 0.4 wt.% to 0.6 wt.%. According to one embodiment, the adhesive, in a dried or undried state, preferably in the undried state, comprises an antifoaming agent in an amount in the range of 0.2 wt.% to 0.8 wt.%, preferably in the range of 0.4 wt.% to 0.6 wt.%.

[0048] According to one embodiment, the adhesive comprises a wetting agent. A wetting agent reduces the interfacial tension between two phases and can promote the formation of dispersions. A wetting agent can comprise 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, for example, comprise fatty acid esters, fatty alcohol ether sulfates, fatty alcohol polyglycol ethers, fatty alcohol sulfates, alkyl sulfosuccinates, alkyl sulfosuccinamates, alkylbenzene sulfates, fatty alcohol ether phosphates, and / or alkyl aryl ether sulfates. It has been found that an adhesive with a wetting agent spreads particularly evenly on the packaging material web. According to one embodiment, the adhesive comprises a wetting agent in an amount ranging from 0.01 wt.% to 3 wt.%.% on.

[0049] According to one embodiment, the adhesive includes a stabilizing agent. A stabilizing agent is an optional adhesive component that serves to improve the stability of the adhesive and / or the adhesive layer, particularly with regard to storage, processing, and stress. Stabilizing agents can include any substances that improve the stability of the adhesive, such as polysaccharides, cellulose derivatives, resins, polymers like polyvinyl alcohol, aluminum oxide, carbon black, and / or kaolin. According to one embodiment, the adhesive contains a stabilizing agent in an amount ranging from 0.01% by weight to 5% by weight.

[0050] The cold-sealable adhesive may contain a base, for example ammonia. The pH of the adhesive can be adjusted by adding a base, for example to a pH of at least 8, preferably at least 9.

[0051] According to one embodiment, the adhesive may contain an antiblocking agent, which may include, for example, an amide wax such as erucic acid amide or oleic acid amide, talc, and / or chalk. An antiblocking agent facilitates easier handling, for example, when opening a packaging bag. According to one embodiment, the adhesive contains an antiblocking agent in an amount ranging from 0.01% by weight to 5% by weight.

[0052] According to one formulation, the adhesive may contain a UV tracer. A UV tracer can be made visible under UV irradiation and can be used, for example, for identifying coated surfaces, for quality control, and / or for (cutting) position detection during the production of the packaging material web or packaging bag. UV-fluorescent additives, for example, can be used as UV tracers. According to one formulation, the adhesive contains a UV tracer in an amount ranging from 0.01% by weight to 1% by weight.

[0053] According to a preferred embodiment, the packaging material web is provided with a coating, for example with an inner coating of the inner layer of the packaging pocket, wherein the coating contains the adhesive in an amount in the range of 2 g / m². 2 up to 20 g / m² 2 , preferably 10 g / m² 2 up to 12 g / m² 2According to one version, the coating includes the adhesive in an amount in the range of 2 g / m². 2 up to 20 g / m² 2 , preferably 10 g / m² 2 up to 12 g / m² 2, wherein the adhesive is present in a dried or undried 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 in the dried state is present in the form of solid particles. An adhesive in an undried state is an undried adhesive that has a water content in the range of 30 wt.% to 70 wt.% and is preferably present as a dispersion. According to the invention, a coated area of ​​the packaging material web, for example, an area of ​​the inner layer coated on the inside of a packaging pocket, can have an adhesive quantity in the range of 2 g / m². 2 up to 20 g / m² 2 , preferably 10 g / m² 2 up to 12 g / m² 2, relative to the coated area. According to one version, the amount of adhesive refers to a range of 2 g / m². 2 up to 20 g / m² 2 , preferably 10 g / m² 2 up to 12 g / m² 2 The adhesive is applied in a dried state, i.e., in its solid particles. Preferably, the adhesive is applied evenly over the coated surface to increase the bond strength.

[0054] According to one embodiment, the adhesive can have a water content in the range of <10 wt.% or 30 wt.% to 70 wt.%, preferably in the range of <10 wt.% or 40 wt.% to 60 wt.%. It has been found that an adhesive with a water content of 30 wt.% to 70 wt.%, and in particular 40 wt.% to 60 wt.%, can be applied particularly well to packaging material webs. After application of the adhesive to the packaging material web, it can optionally be dried, thereby obtaining a water content of <10 wt.%. An adhesive with a water content of <10 wt.% exhibits particularly high storage stability. An adhesive applied to the packaging material web in a dried state has a water content of <10 wt.%, preferably <5 wt.%. An adhesive applied to the packaging material web in an undried state has a water content of 30 wt.% to 70 wt.%.%, preferably 40 wt. % to 60 wt. %, on. A packaging material web with dried and / or undried adhesive exhibits excellent adhesive properties and is suitable for forming into a packaging bag.

[0055] The adhesive, which is a natural rubber latex-based adhesive, is preferably applied in such a way that there is no contact between an applied printing ink film and the adhesive in the finished product, 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.

[0056] The packaging material web according to the invention allows an article, such as a packaged and / or shipping item, to be easily wrapped or encased. This is achieved by folding the packaging material web and moving the folded sections towards each other, optionally placing them on top of one another, so that a permanent bond, in particular a seal, between the two facing folded section surfaces can be created solely through the mutual contact of the adhesive-coated folded section surfaces. The cold-sealable adhesive can further be configured such that activation of the adhesive / sealing effect is necessary for the adhesive to exert its adhesive / sealing action.Activation can be achieved, for example, by applying external pressure, which causes the cold-sealable adhesive to exert its adhesive-sealing effect by firmly pressing the overlapping folded sections together under the pressure. This allows the packaging and / or shipping item to be easily wrapped using the packaging material web. For example, it is not necessary to apply additional heat or adhesive materials. The packaging material web according to the invention significantly increases productivity when packaging items such as packaging and / or shipping items. Furthermore, packaging material can be saved, as multiple wrappings of the item to be protected are no longer required.Furthermore, the length of the packaging material web, measured lengthwise, can be easily and flexibly adjusted to the item being packaged. Because the packaging material web is designed as a continuous roll and the entire inside surface is coated with adhesive, this crucial inventive advantage can be leveraged to produce longer or shorter shipping bags. The length of the shipping bag depends on the length or size of the goods being packaged. Once the length of the packaging bag is defined, it can be created by simply cutting the roll of packaging material to length. This allows for the production of shorter packaging bags, which correspond to the lower price point of a shipping service provider, as well as longer shipping bags, without any increments, which meet the requirements of a freight forwarding company.Such typical lengths are adapted, for example, to Euro pallets, but are in principle adapted to the goods to be packaged, for example, when packaging bar stock with lengths of 1, 2, 3, 5, or 6 meters. A further advantage of the multi-layered construction according to the invention is that the packaging material web provides good cushioning and thus protection for the item being packaged. Another 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 adhesive effect on the flat inner layer is also improved.

[0057] Alternatively or additionally to cold-sealable adhesives, other joining techniques are conceivable. For example, heat sealing is an option, as is applying adhesives on-site, i.e., sealing in a continuous process. Furthermore, it is conceivable to use form-fit and / or force-fit joining technologies, such as embossing, perforation, or similar processes, to create an interlocking and fixed fastening structure within the packaging material web. Additionally, it is possible to use fastening aids as an alternative or supplement, such as sewing with threads, ultrasonic welding, welding with a PE coating, adhesive tapes, or similar methods.

[0058] 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. Thus, the adhesive coating faces the interior of the packaging bag or the item being shipped. According to an exemplary further development of the present invention, the cushioning layer has a corrugated structure, in particular a sinusoidal one. For example, the cushioning layer is designed as a corrugated structure. One wave of the corrugated structure can be oriented transversely, in particular perpendicularly, to the longitudinal direction of the packaging material web. Furthermore, it is possible for the cushioning layer to be made of paper, cardboard, carton, or foam, such as polyurethane (PUR), in particular with a density of less than 90 kg / m³. 3 includes.

[0059] According to a further exemplary embodiment of the present invention, the padding layer comprises flake-like filling material and / or a foam, such as PUR (polyurethane foam) or the like.

[0060] According to an exemplary embodiment of the packaging material web according to the invention, the material of the outer layer has a basis weight in the range of 20 g / m². 2 up to 40 g / m² 2 The outer layer is a kraft liner paper, particularly with a basis weight of around 50 g / m². 2 up to 420 g / m² 2 , preferably in the range of 100 g / m² 2 up to 130 g / m² 2 Furthermore, the outer layer can be a testliner paper, particularly with a basis weight in the range of 50 g / m². 2 130 g / m 2 , preferably in the range of 100 g / m² 2 up to 150 g / m² 2, be. According to another exemplary embodiment, the outer layer is a sodium hydroxide paper, in particular with a basis weight in the range of 20 g / m². 2 up to 120 g / m² 2 , preferably in the range of 40 g / m² 2 up to 70 g / m² 2 Furthermore, the outer layer can also be paper material with a basis weight of around 40 g / m². 2 up to 120 g / m² 2 , preferably in the range of 60 g / m² 2 up to 70 g / m² 2 , be. According to an exemplary training course, the outer layer consists of a material with a basis weight of approximately 120 g / m². 2 up to 130 g / m² 2 , preferably of 125 g / m² 2 . Significant resistance and / or tear strength is important for the material of the outer layer.

[0061] According to a further exemplary embodiment of the present invention, the material of the inner layer has a basis weight in the range of 20 g / m². 2 up to 150 g / m² 2The inner layer, in particular, is a paper with a basis weight of approximately 50 g / m². 2 up to 150 g / m² 2 , preferably in the range of 80 g / m² 2 up to 120 g / m² 2 Furthermore, it is possible that the inner layer is a paper material with a basis weight in the range of 40 g / m². 2 up to 120 g / m² 2 , preferably in the range of 60 g / m² 2 up to 70 g / m² 2 According to an exemplary training course, the inner layer is a sodium hydroxide paper, specifically with a basis weight in the range of 20 g / m². 2 up to 120 g / m² 2 , preferably in the range of 40 g / m² 2 up to 70 g / m² 2 .

[0062] According to an exemplary further development of the packaging material web according to the invention, the material of the corrugated layer has a basis weight in the range of 7 g / m². 2 up to 150 g / m² 2 Specifically, the corrugated paper has a basis weight of approximately 20 g / m². 2up to 120 g / m² 2 , preferably in the range of 50 g / m² 2 up to 120 g / m² 2 , preferably in the range of 80 g / m² 2 up to 120 g / m² 2 .

[0063] According to a further exemplary embodiment of the present invention, the cushioning layer is designed as a sinusoidal wave pattern, in particular as an E-wave. For example, a wave height (amplitude) transverse to the longitudinal extent of the packaging material web is in the range of 0.5 mm to 5 mm, in particular in the range of 0.75 mm to 3 mm or in the range of 1.0 mm to 1.9 mm, and / or a wave pitch (wavelength) transverse to the longitudinal and width directions of the packaging material web is in the range of 1.0 mm to 10 mm, in particular in the range of 1.5 mm to 7.5 mm, in particular in the range of 2.0 mm to 5 mm or in the range of 2.6 mm to 3.5 mm.

[0064] 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% virgin fiber paper material. For example, the cushioning layer consists exclusively of recycled paper.

[0065] This type of E-flute corrugated board is particularly advantageous for packaging purposes, for example, for labeling the packaging bag or printing it with stickers or advertisements. The E-flute allows for particularly space-saving storage of the packaging material web wound onto a roll, as it has been found that the roll diameter can be kept small while maximizing the number of linear meters on the roll.

[0066] In an exemplary embodiment of the packaging material web according to the invention, a sequence consisting of an intermediate layer of paper, cardboard, or carton and a further cushioning layer of paper, cardboard, or carton, particularly shaped according to the cushioning layer and especially sinusoidal, is arranged between the inner layer and the cushioning layer to form a sandwich structure such that the intermediate layer rests against the cushioning layer associated with the outer layer, and the further cushioning layer rests against the intermediate layer and the inner layer. According to this construction principle, desired stability and / or deformability can be achieved as desired, and in particular depending on the desired buffer properties, for example, depending on the item to be packaged.

[0067] According to another exemplary development, the cushioning layer assigned to the outer layer differs from the cushioning layer assigned to the inner layer, particularly with regard to the type of corrugation, the corrugation height, and / or the corrugation spacing. This allows, for example, the cushioning layer facing the inside of the packaging bag to be designed with a focus on high damping or buffering capacity, while the focus for the cushioning layer assigned to the outer layer may be on stability. Typically, buffering capacity is increased by increasing the corrugation height and / or the corrugation spacing of the cushioning layer. Stability is increased by reducing the corrugation height and / or the corrugation spacing of the cushioning layer.

[0068] 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 carton and with a coating of, in particular, cold-sealable adhesive.

[0069] According to a further aspect of the invention, the adhesive, in particular the cold-sealable adhesive, comprises natural rubber latex, a styrene-acrylate copolymer, and preferably an antifoaming agent. It has been found that an adhesive comprising natural rubber latex, a styrene-acrylate copolymer, and optionally an antifoaming agent achieves excellent adhesive properties and is particularly advantageous for the packaging material webs and packaging bags according to the invention. The addition of styrene-acrylate copolymer to the adhesive significantly improves its adhesion compared to a natural rubber latex-based adhesive without styrene-acrylate copolymer. Compared to natural rubber latex-based adhesives that contain other polymers instead of a styrene-acrylate copolymer, a natural rubber latex-based adhesive with a styrene-acrylate copolymer has the advantage of exhibiting extremely high durability.An adhesive comprising natural rubber latex and a styrene-acrylate copolymer therefore exhibits particularly advantageous properties with regard to application on packaging material webs or packaging bags.

[0070] The adhesive, particularly cold-sealable adhesives, can be formulated as an aqueous dispersion. An adhesive in the form of an aqueous dispersion is especially well-suited for application to packaging material webs.

[0071] The adhesive, in particular a cold-sealable adhesive, for example a cold-sealable adhesive in dispersion form, preferably has a pH value of at least pH 8, more preferably at least pH 9. A pH value of at least pH 8, preferably pH 9, prevents the precipitation of components of the natural rubber latex. The pH value of the adhesive can optionally be adjusted to the desired pH value, 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 value of at least pH 8, more preferably pH 9.

[0072] 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, an ethylene-vinyl acetate copolymer, and a polyvinyl acetate. The adhesive may contain one or more of the further components. For example, the adhesive may comprise 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, such as a wetting agent, a base, and a UV tracer.

[0073] 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. An defoamer may, for example, comprise 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 application of the adhesive can be facilitated by the use of a defoamer, as it prevents foaming of the adhesive during application. It has been found that foaming of the adhesive can be effectively prevented by an amount of defoamer in the range of 0.2 wt.% to 0.8 wt.%, preferably in the range of 0.4 wt.% to 0.6 wt.%.According to a preferred embodiment, the cold-sealable adhesive contains an antifoaming agent in an amount in the range of 0.2 wt.% to 0.8 wt.%, preferably in the range of 0.4 wt.% to 0.6 wt.%. According to one embodiment, the adhesive, in a dried or undried state, preferably in the undried state, comprises an antifoaming agent in an amount in the range of 0.2 wt.% to 0.8 wt.%, preferably in the range of 0.4 wt.% to 0.6 wt.%.

[0074] According to one embodiment, the adhesive comprises a wetting agent. A wetting agent reduces the interfacial tension between two phases and can promote the formation of dispersions. A wetting agent can comprise 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, for example, comprise fatty acid esters, fatty alcohol ether sulfates, fatty alcohol polyglycol ethers, fatty alcohol sulfates, alkyl sulfosuccinates, alkyl sulfosuccinamates, alkylbenzene sulfates, fatty alcohol ether phosphates, and / or alkyl aryl ether sulfates. It has been found that an adhesive with a wetting agent spreads particularly evenly on the packaging material web. According to one embodiment, the adhesive comprises a wetting agent in an amount ranging from 0.01 wt.% to 3 wt.%.% on.

[0075] According to one embodiment, the adhesive includes a stabilizing agent. A stabilizing agent is an optional adhesive component that serves to improve the stability of the adhesive and / or the adhesive layer, particularly with regard to storage, processing, and stress. Stabilizing agents can include any substances that improve the stability of the adhesive, such as polysaccharides, cellulose derivatives, resins, polymers like polyvinyl alcohol, aluminum oxide, carbon black, and / or kaolin. According to one embodiment, the adhesive contains a stabilizing agent in an amount ranging from 0.01% by weight to 5% by weight.

[0076] The cold-sealable adhesive may contain a base, for example ammonia. The pH of the adhesive can be adjusted by adding a base, for example to a pH of at least 8, preferably at least 9.

[0077] According to one embodiment, the adhesive may contain an antiblocking agent, which may include, for example, an amide wax such as erucic acid amide or oleic acid amide, talc, and / or chalk. An antiblocking agent facilitates easier handling, for example, when opening a packaging bag. According to one embodiment, the adhesive contains an antiblocking agent in an amount ranging from 0.01% by weight to 5% by weight.

[0078] According to one embodiment, the adhesive may contain a UV tracer. A UV tracer can be made visible under UV irradiation and can be used, for example, for identifying coated surfaces, for quality control, and / or for (cutting) position detection during the production of the packaging material web or the packaging bag. UV-fluorescent additives, for example, can be used as UV tracers. According to one embodiment, the adhesive contains a UV tracer in an amount ranging from 0.01% by weight to 1% by weight.

[0079] According to a preferred embodiment, the packaging material web is provided with a coating, for example with a coating on the inside of the packaging pocket of the inner layer, wherein the coating contains the adhesive in an amount in the range of 2 g / m². 2 up to 20 g / m² 2 , preferably 10 g / m² 2 up to 12 g / m² 2According to one version, the coating includes the adhesive in an amount in the range of 2 g / m². 2 up to 20 g / m² 2 , preferably 10 g / m² 2 up to 12 g / m² 2, wherein the adhesive is present in a dried or undried 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 in the dried state is present in the form of solid particles. An adhesive in an undried state is an undried adhesive that has a water content in the range of 30 wt.% to 70 wt.% and is preferably present as a dispersion. According to the invention, a coated area of ​​the packaging material web, for example, an area of ​​the inner layer coated on the inside of a packaging pocket, can have an adhesive quantity in the range of 2 g / m². 2 up to 20 g / m² 2 , preferably 10 g / m² 2 up to 12 g / m² 2, relative to the coated area. According to one version, the amount of adhesive refers to a range of 2 g / m². 2 up to 20 g / m² 2 , preferably 10 g / m² 2 up to 12 g / m² 2The adhesive is applied in a dried state, i.e., to the solid particles of the adhesive. Preferably, the adhesive is applied evenly over the coated surface to increase the bond strength. According to one embodiment, the adhesive can have a water content in the range of <10 wt.% or 30 wt.% to 70 wt.%, preferably in the range of <10 wt.% or 40 wt.% to 60 wt.%. It has been found that an adhesive with a water content of 30 wt.% to 70 wt.%, and in particular 40 wt.% to 60 wt.%, can be applied particularly well to packaging material webs. After application of the adhesive to the packaging material web, it can optionally be dried, thereby obtaining a water content of <10 wt.%. An adhesive with a water content of <10 wt.% exhibits particularly high storage stability.An adhesive applied to the packaging material web in a dried state has a water content of <10 wt.%, preferably <5 wt.%. An adhesive applied to the packaging material web in an undried state has a water content of 30 wt.% to 70 wt.%, preferably 40 wt.% to 60 wt.%. A packaging material web with dried and / or undried adhesive exhibits excellent adhesive properties and is suitable for forming into a packaging bag.

[0080] According to an exemplary embodiment of the packaging material web according to the invention, the packaging material web has several transverse stripes oriented transversely, in particular perpendicularly, to the longitudinal direction of the web and / or arranged at equidistant intervals from one another, which are provided with a cold-sealable adhesive. The application of the cold-sealable adhesive can be carried out analogously to that of the longitudinal edge stripe. Due to the transverse stripes being evenly distributed in the longitudinal direction of the web, the packaging material web can be sealed and / or glued at both the longitudinal edge stripe and the transverse stripes to form a closed envelope, in particular a packaging bag. For example, the distance between the transverse stripes can be dimensioned according to a standard for shipping packages, such as a DHL parcel.

[0081] In another exemplary embodiment of the packaging material web according to the invention, the transverse stripes each terminate in at least one, preferably both, longitudinal edge stripes. For example, the packaging material web can have a repeating pattern, repeat, or grid of longitudinal edge and transverse stripes provided with cold-sealable adhesive, wherein the pattern has rectangular, in particular square, adhesive windows that form the pattern or grid. Thus, it can be provided that the packaging material web between the longitudinal edge and transverse stripes is essentially free of the cold-sealable adhesive over a large area. The pattern or repeat can either be uniform in the longitudinal direction of the web or change, wherein the patterns or repeats can be dimensioned such that they are also adapted to articles of a predetermined size and / or to standardized sizes, for example, of a DHL parcel.

[0082] In a further exemplary embodiment of the present invention, the transverse strips, particularly in the area of ​​at least one longitudinal edge strip, and especially at 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 made, and / or a packaging bag itself. The indicator can, for example, be a material weakening, in particular a perforation or an indentation from the outside, or a color marking. The indicator can be configured to be detectable, so that automated production and packaging are possible or simplified. The indicator enables a precise and length-specific packaging process for the articles, which may be of different sizes. According to one embodiment, the indicator can be a UV tracer contained in the adhesive.

[0083] According to a further aspect of the present invention, which can be combined with the preceding aspects and exemplary embodiments, a packaging bag for wrapping 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 optionally: cutting to length, such as cutting off a blank of suitable dimensions from the packaging material web.

[0084] In an exemplary embodiment of the packaging bag according to the invention, it has dimensions ranging from 30 mm to any desired length, 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) × 1 mm to 200 mm (depth transverse to the longitudinal and width directions of the web). For example, the packaging bag has the dimensions of a standard postal letter, namely approximately 353 mm x 250 mm x 50 cm.

[0085] According to another exemplary embodiment, at least one edge forming a border of the packaging bag, in particular two overlapping edges, is formed by cutting, in particular by means of a rotary or guillotine cutting knife, to length.

[0086] In one exemplary further development process, the cut edge, particularly the trimmed edge, is slightly frayed or blunt, and / or blunt enough that the packaging bag can be handled by hand without injury. The shape of the cut edge is determined by the shape of the cutting device used, especially its cutting blade or knife. The cut edge can be wavy, jagged, frayed, etc. Specifically, the cut edge is slightly serrated, similar to a toothed blade, and the protruding tips of the cardboard teeth are slightly frayed. This means that the cut edge, or the edge of the cardboard, is not sharp or razor-sharp, but rather a blunt, slightly frayed edge remains, so that a user will not cut themselves.According to a further exemplary embodiment of the packaging bag according to the invention, the adhesive coating is designed and, in particular, applied over 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.

[0087] Preferred embodiments are specified in the dependent claims.

[0088] Further properties, features and advantages of the invention will be clarified below by describing preferred embodiments of the invention with reference to the accompanying exemplary drawings, which show: Fig. 1: a schematic perspective representation of an exemplary embodiment of a packaging material web according to the invention; Fig. 2: a schematic perspective representation of a further exemplary embodiment of a packaging material web according to the invention; Fig. 3: a schematic side view of the packaging material web made of Fig. 1; and Fig. 4: a schematic detail section of a wavelength of a packaging material web according to the invention.

[0089] In the following description of exemplary embodiments of packaging material webs according to the invention, which are generally designated by reference numeral 1, the exemplary embodiments of the packaging material webs according to the invention are to be understood as a multi-layered sandwich structure made of several layers of material webs suitable for packaging purposes, made of paper, cardboard and / or carton, which are selected in an arrangement suitable for packaging purposes, in particular for providing a good cushioning function with a simultaneously good deformability of the packaging material web to form the desired packaging bag for wrapping a shipping item.

[0090] All embodiments of the packaging material webs 1 according to the invention are characterized, firstly, by an alternating arrangement of flat layers, for example made of cardboard, paper, or carton, and cushioning and / or padding layers, in particular made of cardboard, carton, or paper, and secondly, by the fact that the layers forming the top and bottom surfaces are each realized as flat material layers. A further characteristic feature of the packaging material webs according to the invention is that a flat material layer forming the top or bottom surface is coated, at least partially, with an adhesive, in particular one capable of cold sealing, which enables the sealing of the packaging bag by forming the packaging material web into a closed shell and activating the adhesive.

[0091] According to the exemplary design as follows Fig. 1 The packaging material web 1 according to the invention comprises an outer layer 3 forming an outer side of the packaging bag to be formed, for example made of paper, cardboard or carton, in particular with a basis weight in the range of 20 g / m² 2 up to 420 g / m² 2 , preferably made of kraftliner paper, in particular with a basis weight in the range of 50 g / m² 2 up to 420 g / m² 2 , a cushioning layer, in particular sinusoidal, formed as a wave layer 5 and adjacent to the outer layer 3, for example made of paper, cardboard or carton, in particular with a basis weight in the range of 7 g / m² 2 150 g / m 2 , preferably a paper with a basis weight in the range of 20 g / m² 2 up to 120 g / m² 2 , and an inner layer 7, for example made of paper, cardboard or carton, in particular with a basis weight in the range of 20 g / m², which lies against the corrugated layer 5 and forms an inside of the packaging bag to be formed. 2 150 g / m 2, preferably a paper with a basis weight in the range of 50 g / m² 2 up to 150 g / m² 2 The inner layer 7 is coated on the inside of the packaging bag, i.e. on its surface facing away from the outer layer 3 and towards the inside of the packaging bag, with an adhesive that is particularly suitable for cold sealing, which is indicated by the reference numeral 9.

[0092] In Fig. Figure 2 shows a further embodiment of a packaging material web 1 according to the invention, which is based on the same basic principle as the packaging material web 1 made of Fig. 1 is based on, but has additional layers: Between the inner layer 7 and the corrugated layer 5, a sequence is arranged consisting of an intermediate layer 11 made of paper, cardboard, or carton, which may preferably be designed analogously to the inner layer 7, and a further corrugated layer 13 made of paper, cardboard, or carton, which is designed in particular according to the corrugated layer 5 and / or made of the same material, and in particular sinusoidal, such that the intermediate layer 11 rests against the corrugated layer 5 associated with the outer layer 3, and the further corrugated layer 13 rests against both the intermediate layer 11 and the inner layer 7. According to this construction principle, any sandwich structures can be produced from packaging material webs according to the invention and adapted to the buffering capacity, damping capacity, stability, and / or deformability required depending on the item being shipped.

[0093] In the Fig. 3 is the packaging material web 1 according to Fig. Figure 1 shows the side view and indicates the adhesive layer 9. It should be clear that the solid line with the reference symbol 9, which represents the adhesive layer, is only intended to schematically indicate and clarify the position or application of the adhesive layer 9, but is not to be understood as being to scale, especially with regard to the thickness of the adhesive layer 9.

[0094] In the Fig. Section 4 describes the characterization and design options for manufacturing and laying out the corrugations 5 and 13, which in preferred embodiments are each formed as uniform, sinusoidal E-waves. The selected E-waves are characterized, among other things, by a wave height h oriented transversely to the longitudinal extent L of the packaging material web 1 in the range of 1.0 mm to 1.9 mm and a wave pitch t, ​​dimensioned transversely to the longitudinal extent L and transversely to the height direction H in the width direction B, in the range of 2.6 mm to 3.5 mm. This type of E-wave has proven to be particularly advantageous for packaging purposes.It has a low profile and a very flat overall design, exhibits high strength, and possesses good damping properties for absorbing and buffering impacts to protect the goods inside the shipping bag. It is also easily formable, making it simple to fold and bring the sections together as described earlier. Another advantage is that the E-flute is very easy to print on, for example, to label the packaging bags or to add stickers or advertising. Furthermore, this allows for optimized storage of packaging material rolls with a 5 / 13 flute profile, as the roll diameter can be kept small while maximizing the number of linear meters per roll, thus saving space.

[0095] Besides the advantages of E-flute corrugated board, other flute profiles are also conceivable, depending on the requirements of the shipping bag and / or the packaging material web. Preferably, the even flatter F-flute or the taller D-flute, B-flute, or C-flute are used as alternatives to E-flute. F-flute has different damping properties, and the structurally determined taller flutes exhibit particularly higher damping properties.

[0096] The wave pattern 5, 13 has alternating crests 15 and troughs 17, which, according to the preferred embodiments, are evenly distributed in the latitudinal direction B and always have the same wave height. Referring again to Fig. 2 can be seen that the wave position 13 assigned to the inner layer 7 has a lower wave pitch t, ​​but a higher wave height h than the wave position 5 assigned to the outer layer 3.

[0097] The features disclosed in the foregoing description, figures and claims can be important for the realization of the invention in its various embodiments, both individually and in any combination. Reference symbol list 1 packaging material web 3 Outer layer 5 Wave position 7 inner layer 9 Adhesive 11 Intermediate layer 13 Wave position 15 wave crest 17 troughs L Longitudinal direction B Latitude direction H Altitude h wave height t wave division QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] WO 2005 / 080519 A1 [0002, 0003] DE 10 2020 114 211 A1

[0003]

Claims

[1] Packaging material web (1) which can be formed into a packaging bag for wrapping a shipping item, comprising - an outside position (3), - an inner layer (7) and - a cushioning layer (5) arranged between the outer layer (5) and the inner layer (7), wherein at least one layer comprises paper, cardboard or carton, characterized by that the inner layer (7) is provided at least in certain areas with an adhesive coating (9) that is particularly suitable for cold sealing. [2] Packaging material web (1) according to claim 1, characterized by 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 by, that the cushioning layer (5) has a particularly sinusoidal wave pattern, in particular is designed as a wave pattern, wherein in particular a wave of the wave pattern (5) is oriented transversely, in particular perpendicularly, to the longitudinal direction of the packaging material web (1), and / or is made of paper, cardboard, carton or foam in particular with a density of less than 90 kg / m3. [4] Packaging material web (1) according to claim 1 or 2, characterized by , that the padding layer (5) has flake-like filling material and / or a foam, such as PUR (polyurethane foam) or the like. [5] Packaging material web (1) according to any one of the preceding claims, characterized by , that the material of the outer layer (3) has a basis weight in the range of 20 g / m² 2 up to 420 g / m² 2 comprising, in particular the outer layer (3) being a kraft liner paper, especially with a basis weight in the range of 50 g / m² 2 up to 420 g / m² 2preferably in the range of 100 g / m² 2 up to 130 g / m² 2 , or a testliner paper, especially with a basis weight in the range of 50 g / m² 2 up to 230 g / m² 2 preferably in the range of 100 g / m² 2 up to 150 g / m² 2 , is. [6] Packaging material web (1) according to one of the preceding claims, characterized by , that the material of the inner layer (7) has a basis weight in the range of 20 g / m2 to 150 g / m2, wherein in particular the inner layer (7) is a paper, in particular with a basis weight in the range of 50 g / m2 to 150 g / m2, preferably in the range of 80 g / m2 to 120 g / m2. [7] Packaging material web (1) according to one of the preceding claims, characterized by , that the material of the padding layer (5) has a grammage in the range of 20 g / m2 to 150 g / m2. [8] Packaging material web (1) according to any one of the preceding claims, characterized by, that the padding layer (5) is designed as a sinusoidal wave pattern, wherein in particular a wave height (h) (amplitude) is in the range of 0.5 mm to 5.0 mm and / or a wave pitch (t) (wavelength) is in the range of 1.0 mm to 10 mm. [9] Packaging material web (1) according to any one of the preceding claims, characterized by , that the cushioning layer (5) comprises recycled paper, in particular with a proportion of no more than 50% or no more than 70% virgin fiber paper material, wherein in particular the cushioning layer (5) consists of recycled paper. [10] Packaging material web (1) according to any one of the preceding claims, characterized by, that between the inner layer (7) and the padding layer (5) a sequence of an intermediate layer (11) of paper, cardboard or carton and a further padding layer (13) designed in particular according to the padding layer is arranged to form a sandwich structure such that the intermediate layer (11) abuts the padding layer (5) associated with the outer layer (3) and the further padding layer (13) abuts the intermediate layer (11) and the inner layer (7). [11] Packaging material web (1) according to claim 10, characterized by , 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 wave type, wave height (h) and / or wave pitch (t). [12] Packaging material web (1), 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 carton and with a coating of, in particular, a cold-sealable adhesive, characterized by , that the adhesive (9) comprises natural rubber latex, a 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. [13] Packaging material web (1) according to claim 9, characterized by , that the adhesive (9) comprises at least one 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. [14] Packaging material web (1) according to any one of the preceding claims, characterized by, that the coating contains the adhesive (9) in an amount in the range of 2 g / m² 2 up to 20 g / m² 2 , preferably 10 g / m² 2 up to 12 g / m² 2 , includes. [15] Packaging material web (1) according to any one of the preceding claims, characterized by , that the adhesive (9) contains the defoamer in an amount in the range of 0.2 wt. % to 0.8 wt. %, preferably in the range of 0.4 wt. % to 0.6 wt. %,. [16] Packaging material web (1) according to any one of the preceding claims, characterized by , that the adhesive (9) has a water content in a range of <10 wt. % or 30 wt. % to 70 wt. %, preferably in a range of <10 wt. % or 40 wt. % to 60 wt. %,. [17] 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. [18] Packaging bag according to claim 17 having dimensions ranging from 30 mm to, in particular, 350 mm (length) x 50 mm to 1000 mm (width) x 1 mm to 200 mm (depth). [19] Packaging bag according to claim 17 or 18, wherein at least one edge forming a rim of the packaging bag, in particular two overlapping edges, is formed by cutting to length, in particular by cutting the packaging material web (1), in particular by means of a rotary or guillotine knife. [20] Packaging bag according to one of claims 17 to 19, wherein the cut edge, in particular the cut edge, is slightly frayed or ragged and / or is blunt in such a way that the packaging bag can be manipulated by hand at the cut edge without injury. [21] 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.

Images