PACKAGING MATERIAL TRACK, PACKAGING BAG, PACKAGING MATERIAL CUTTING AND MANUFACTURING PROCESS

Description

[0001] The present invention relates to a packaging material web, a packaging bag, and a packaging material blank. Packaging material webs, packaging bags, and packaging material blanks according to the invention are used in the packaging industry to package items, particularly shipping goods, and especially 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, particularly corrugated cardboard. Furthermore, the present invention relates to methods for producing a packaging material web, a packaging bag, and a packaging material blank.

[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 material web or packaging bag according to WO 2005 / 080519 A1 has proven to be disadvantageous in that a relatively large amount of force is required to fold the packaging material web and wrap it around the article 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 to different article sizes to a limited extent.

[0004] DE 69 529 093 T2 relates to a method for packaging individual pieces of chewing gum or chewing gum packaged in this way. US 2013 / 295242A1 relates to packaging with axially oriented film strips. US 2013 / 182977A1 ​​relates to flexible packaging made of web-like plastic material. US 1,217,820 relates to flexible packaging bags.

[0005] One object of the present invention is to improve upon the disadvantages of the prior art, in particular to further develop a packaging material web, a packaging bag and a packaging material blank in such a way that it is easier to process with less effort and / or can be adapted better and more precisely to different article sizes, especially for forming a packaging bag.

[0006] The problem is solved by the subject matter of claims 1, 12, 15 and 16.

[0007] A packaging material web, in particular made of paper or cardboard, especially corrugated cardboard, is then provided. 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 material. 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 longitudinally to 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 transversely to the machine direction of at most 60 Nm / g, preferably a tensile strength of 5 Nm / g to 40 Nm / g. To determine the tensile strength, respectively,The tensile strength index can be determined according to DIN EN ISO 1924-2 or DIN EN ISO 1924-3. Alternatively, the properties of recycled or waste paper can be characterized by its burst resistance. In this context, recycled paper has a burst index of no more than 3.0 kPa*m^2 / g, preferably between 0.8 kPa*m^2 / g and 2.5 kPa*m^2 / g. The burst index is determined according to 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.

[0008] The packaging material web extends in a longitudinal direction and can have a constant web / material thickness or a constant width when viewed transversely to the web's longitudinal direction. In the width direction, the packaging material web terminates at each longitudinal edge or edge 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 2000 mm. For example, the width is approximately 500 mm. At least one longitudinal edge strip adjacent to a longitudinal edge is coated, at least partially, with a cold-sealable adhesive. The width of the longitudinal edge strip coated with cold-sealable adhesive is at least 10 mm and, in particular, at most 300 mm, 250 mm, or at most 200 mm. For example, both longitudinal edges can be coated with cold-sealable adhesive.

[0009] 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 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. The cold-sealable adhesive can, for example, comprise latex and a styrene acrylate polymer, and optionally a proportion of 0.4% to 0.6% of an antifoaming agent. The adhesive solids content can, for example, be 50% ± 10%, the remainder being water.The cold-sealable adhesive can be applied, for example, by rollers (which may be made of rubber, brass, or copper), by spraying, or by 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.

[0010] The packaging material web has at least one, and in particular at least two, and in particular three, four, five, six or more, folding hinge extending in the longitudinal direction of the web, and in particular arranged centrally with respect to a width measured transversely to the longitudinal direction of the web. The folding hinge defines a folding axis along which two longitudinal web sections connected by means of the folding hinge can be folded. In other words, the folding hinge divides the packaging material web into two longitudinal web sections extending parallel to each other. The at least one folding hinge makes it possible to easily pack or wrap an item to be packaged, such as a packaging and / or shipping item, using the packaging material web.After the longitudinal web sections are folded along the folding axis and moved towards each other, and optionally placed on top of each other, a permanent bond, in particular a seal, between the two facing longitudinal web section surfaces can be created solely through the mutual contact of the adhesive-coated longitudinal web section surfaces. The cold-sealable adhesive can also be designed such that activation of the adhesive / sealing effect is necessary for the adhesive to develop its adhesive / sealing action. Activation can be achieved, for example, by applying external pressure, which causes the cold-sealable adhesive to develop its adhesive / sealing effect. Thus, the packaging and / or shipping item can 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 materials and / or shipping items. Furthermore, packaging material can be saved because multiple wrappings of the item to be protected are no longer required. Additionally, the length of the packaging material web, measured in the longitudinal direction, can be easily and flexibly adjusted to the item being packaged. Another advantage of cardboard, especially corrugated cardboard, is that the cardboard itself already provides its own cushioning and thus protective effect for the item being packaged.

[0011] According to the invention, the packaging material web is free of cold-sealable adhesive at least in sections along the folding joint. Furthermore, it can be provided that the longitudinal web sections are largely free of cold-sealable adhesive, i.e., for example, at least 30%, in particular at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, or at least 95%. This allows for savings in adhesive material. Moreover, it is ensured that when packaging the article, in particular when closing the packaging material web to form a packaging bag, as little as possible, and in particular no cold-sealable adhesive layer at all, comes into contact with the article.In particular, it can be ensured that only those areas of the packaging material web on the longitudinal edge strips coated with cold-sealable adhesive form a permanent bond with the respective joining partner of the packaging material web. This also ensures that the packaging bag to be produced can be completely sealed with the cold-sealable adhesive, but remains largely free of an adhesive layer. This allows the formed packaging bag to be easily reopened to remove the item.

[0012] For example, the packaging material web can be provided with one or more means that reinforce the subsequent sealing of the packaging material web to form a packaging bag. For example, the packaging material web can have embossing lines or rows of embossing, particularly point-like embossing, running at least in sections along the web or transversely to it, which are introduced, for example, by external mechanical force. Alternatively or additionally, the packaging material web can have a structure that changes the fiber orientation, either at points or in sections, which can be achieved, for example, by the embossing lines or rows of embossing.The embossing lines, embossing, or texturing can be arranged in the area of ​​the longitudinal edge strips and / or in the area of ​​transverse strips oriented transversely, particularly perpendicularly, to the web direction. The longitudinal edge strips and the transverse strips are coated with adhesive, which is brought into contact with each other to form a packaging bag. This contact is achieved by activating the adhesive. The embossing lines, embossing, or texturing strengthens the seal of the packaging bag. For example, this can be achieved through a form-fit, particularly by a form-matched embossing or texturing of the longitudinal edge strips or transverse strips to be sealed together.

[0013] According to an exemplary embodiment of the packaging material web according to the invention, the folding hinge is manufactured in one piece with the longitudinal web sections. For example, the folding hinge can be introduced into the packaging material web from the outside, particularly starting from a surface of the packaging material web. Furthermore, the folding hinge can be designed as a film hinge. The film hinge can, for example, be realized as a thin-walled connection, for example in the form of a fold, particularly a folding fold. The material thickness of the packaging material web in the area of ​​the film hinge can be thinner than in the adjacent longitudinal web sections, for example by about 30 to 75%. According to an exemplary further development, the folding hinge and / or the film hinge allows the longitudinal web sections to be folded around the folding axis in only one direction.The surface of the packaging material web on which the folding hinge is formed forms the interior of the packaging bag.

[0014] According to the invention, the folding joint is realized as a longitudinal groove.

[0015] The longitudinal groove is characterized by the fact that the longitudinal track segments are defined along the groove and can be folded over with less force. The longitudinal groove is created, for example, by external mechanical force, such as by a creasing, embossing, or stamping tool.

[0016] 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.

[0017] 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 substantially free of the cold-sealable adhesive, particularly over a large area. The pattern or repeat can either form uniformly 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.

[0018] In a further exemplary embodiment of the present invention, the transverse strips, particularly in the area of ​​at least one longitudinal edge strip, 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 items of potentially different sizes.

[0019] According to an exemplary further development, the transverse strips, particularly between two indicators arranged on a longitudinal edge strip, are at least partially free of cold-sealable adhesive. This reduces adhesive consumption and lowers the cost of the packaging material web. Furthermore, it was found that the adhesive-free areas within the transverse strips lead to reduced wear and / or reduced wetting of a cutting device, such as the cutting edge of a cutting station, by the adhesive layer.

[0020] In a further exemplary embodiment of the material web according to the invention, the packaging material web has at least one material weakening row oriented in the longitudinal direction and / or transversely to the longitudinal direction of the web to form a predetermined tear line. The material weakening row can be formed, for example, as a perforation-material rib row, in particular consisting of several alternating perforations and material ribs, or as a groove, for example by punching or embossing. In particular, the at least one material weakening row is arranged on the surface of the packaging material web opposite the folding hinge. The material weakening row can be arranged directly adjacent to a transverse strip. The material weakening row can be spaced a few millimeters, for example, at most 15 mm, away from the transverse strip.The material weakening row allows for easy, defined opening of a packaging bag made from the packaging material web, providing access to the packaged item. For example, two material weakening rows, extending parallel to each other and of identical design, can be provided and arranged at a distance from each other in the longitudinal direction of the web such that a thin strip of packaging material extending transversely to the longitudinal direction is created between the material weakening rows. This strip can be separated from the rest of the packaging material web, as if torn off, to open the packaging bag formed from the packaging material web and thus allow access to the item.

[0021] According to an exemplary further development, two transverse material weakening rows, in particular identically shaped and / or oriented parallel to each other, are arranged directly adjacent to a transverse strip. "Directly adjacent" in this context means that the distance between the transverse strip and the more distant transverse material weakening row is at most 20 mm. Furthermore, it can be provided that the packaging material web defines a conveying direction in which the packaging material web is conveyed, for example, from a supply of packaging material, which may be in a roll form or a stack form, for example, by means of accordion folding, and optionally fed to a packaging material production machine, and the two transverse material weakening rows are arranged up and / or down the conveying direction of the transverse strip.

[0022] In a further exemplary embodiment of the present invention, the amount of the cold-sealable adhesive is at least 3 g / m², in particular at least 7 g / m², and in particular at most 15 g / m². It has been found that the specified amount of adhesive is advantageous for good adhesion and / or secure sealing of the packaging material web to form a packaging bag.

[0023] According to an exemplary embodiment of the packaging material web according to the invention, the cold-sealable adhesive is mixed with a contrast agent. For example, the contrast agent is configured to make the adhesive, and thus the longitudinal edge and / or transverse strips, visually identifiable. This facilitates the packaging process, particularly automated processes. The contrast agent can, for example, be configured to be identifiable by optical sensors. For instance, the detection of the adhesive's contrast agent can trigger an action, such as cutting the packaging material web to length and / or applying external pressure to bond the longitudinal edge strips together using the cold-sealable adhesive.

[0024] In a further exemplary embodiment of the packaging material web according to the invention, it is hydrophobized, in particular sizing. Especially with packaging material webs made of paper or cardboard, hydrophobization has proven advantageous with regard to the absorbency of the packaging material web, in order to improve coating with the cold-sealable adhesive, and in particular to increase the cross-linking between the packaging material web material and the adhesive material. In the paper industry, sizing generally refers to the hydrophobization of paper fibers. Sizing can reduce the internal surface tension of the paper material and thus decrease capillarity. Furthermore, sizing also seals so-called fiber-to-fiber bonds, thereby increasing the tear resistance of the paper packaging material web.

[0025] According to a further aspect of the present invention, which can be combined with the preceding aspects and exemplary embodiments, a packaging bag is provided. Packaging bags generally serve to completely and / or protectively surround an item, such as a shipping item, so that it can, for example, be shipped. With packaging bags, there is a fundamental interest in keeping the packaging bag as small as possible, fitting the item to be packaged and, if applicable, shipped as precisely as possible, so that the material required for the packaging bag can be kept to a minimum.

[0026] The packaging bag according to the invention comprises a cover or envelope made of a packaging material web, designed in particular according to one of the preceding aspects or exemplary embodiments. The packaging material web, and thus the cover, can be made, for example, of paper or cardboard, in particular corrugated cardboard.

[0027] The envelope is sealed to form a packaging cavity by cold-sealing the edge strips of the packaging material web and has at least one predefined fold incorporated into the packaging material web. For cold-sealing the edge strips, for example, two longitudinal and two transverse strips, the corresponding edge and transverse strips can be coated with a cold-sealable adhesive. The envelope is completely closed, creating a sealed packaging cavity for the item to be packaged and, if applicable, shipped. The surrounding edge closing the packaging cavity is formed partly by the fold and partly by the cold-sealed edge strips. If the packaging bag has a rectangular base, for example, one edge is formed by the fold and the other three edges by cold-sealed edge strips.The fold can be pre-formed into the packaging material web, for example, as a weakening of the material, particularly as a series of perforations and material ridges, especially consisting of several alternating perforations and ridges, or as a longitudinal groove, for example, by embossing, die-cutting, or creasing. The fold can divide the packaging material web into two longitudinal sections, which are folded over along the fold line, defining a single fold axis, to form the packaging pocket and are cold-sealed at their ends. The fold faces into the packaging cavity.

[0028] The packaging bag is characterized by the fact that an inner wall defining the packaging cavity is partially free of a cold-sealable adhesive coating, and / or the fold is partially free. The inner wall is formed by a packaging material web surface, in particular the surface into which the fold is inserted.

[0029] In an exemplary embodiment of the packaging bag according to the invention, the packaging bag has at least two, in particular three, four, five, six or more, predefined folds incorporated into the packaging material web. The folds are parallel to each other and / or oriented in the longitudinal direction of the web. The increased number of predefined folds allows the shape of the packaging bag to be flexibly and easily adapted to the item being packaged. For example, the at least two folds are arranged such that the packaging cavity can be adapted to the item being packaged. For example, all folds extend into the packaging cavity and each connects two longitudinal web sections of the packaging material web that define the packaging cavity.It has been found that for larger items, a higher number of folds has a beneficial effect on packaging the item in a way that is precise in shape and / or fit, and saves on packaging material.

[0030] According to an exemplary embodiment of the packaging bag according to the invention, the packaging cavity is partially filled with filling and / or cushioning material. The filling and / or cushioning material can consist, for example, of paper or cardboard, in particular corrugated cardboard, or other packaging materials. The filling and / or cushioning material protects the packaged item, which may be shipped, within the packaging cavity by providing a damping and cushioning effect.

[0031] According to a further aspect of the present invention, which can be combined with the preceding aspects and exemplary embodiments, a packaging material blank is provided for the production of a packaging bag, particularly one designed according to one of the aspects or exemplary embodiments described above. The packaging material blank according to the invention is produced by cutting, in particular by slicing or tearing, a web of packaging material according to the invention transversely to its longitudinal direction and transversely to the at least one folding hinge. The packaging material blanks can be dimensioned according to standardized packaging, such as a DHL parcel. The packaging material blank according to the invention can be easily further processed into a packaging bag, particularly one according to the invention.To package an item, it is placed on the packaging material blank, and the blank is folded along the fold or hinge to create a sealed packaging cavity, ensuring that the longitudinal edge strips coated with cold-sealable adhesive face each other. Applying external pressure activates the cold-sealable adhesive easily, without the need for additional packaging aids or heat, sealing the longitudinal edge strips together. This creates a closed envelope that defines the packaging cavity and surrounds the item.

[0032] According to a further aspect of the invention, which can be combined with the preceding aspects and exemplary embodiments, a method for producing a packaging material web, in particular designed according to one of the aspects or exemplary embodiments described above, which consists, for example, of paper or cardboard, in particular corrugated cardboard, has been provided.

[0033] The process involves providing a web-shaped packaging material, for example paper or cardboard, in particular corrugated cardboard.

[0034] Furthermore, at least one longitudinal edge strip adjacent to a longitudinal edge of the web-shaped packaging material, and in particular both longitudinal edge strips, are provided, at least partially, with a cold-sealable adhesive. Reference can be made to the preceding descriptions regarding the cold-sealable adhesive and the longitudinal edge strips.

[0035] According to the invention, the web-shaped packaging material is weakened, particularly in the middle with respect to a width of the packaging material web measured transversely to the longitudinal direction of the web, to form at least one folding hinge extending in the longitudinal direction of the web. For example, the web-shaped packaging material is perforated, embossed, die-cut and / or scored.

[0036] According to an exemplary further development of the method according to the invention, the method can be carried out in such a way that it produces a packaging material web according to one of the aspects or exemplary embodiments described above.

[0037] According to a further aspect of the present invention, which can be combined with the preceding aspects and exemplary embodiments, a method for producing a packaging bag, in particular designed according to one of the aspects or exemplary embodiments described above, has been created.

[0038] In this process, a packaging material web, designed according to one of the aspects or exemplary embodiments described above, is provided. This web may consist, for example, of paper or cardboard, particularly corrugated board. Furthermore, at least one fold is incorporated into the packaging material web. This fold acts as a hinge and defines a fold axis along which two longitudinal web sections of the packaging material web, connected by means of the fold, can be folded.

[0039] According to the invention, the packaging material web is formed into a shell and the shell is closed to form a packaging cavity by cold sealing edge strips of the packaging material web in such a way that at least one fold fold points into the packaging cavity.

[0040] According to an exemplary training course, the procedure can be carried out in such a way that a packaging bag designed according to one of the above aspects or exemplary designs is produced.

[0041] According to a further aspect of the present invention, which can be combined with the preceding aspects and exemplary embodiments, a method for producing a packaging material blank is provided, which is configured to produce a packaging bag, in particular one designed according to one of the preceding aspects or exemplary embodiments. In the method, a packaging material web according to the invention is provided and cut to length transversely to the longitudinal direction of the web and transversely to the at least one folding hinge, in particular by cutting or tearing.

[0042] Preferred embodiments are given in the dependent claims.

[0043] 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 shows a section of an exemplary embodiment of a packaging material web according to the invention; Fig. 2 shows a section of an exemplary embodiment of a packaging material web according to the invention; Fig. 3 shows a section of an exemplary embodiment of a packaging material web according to the invention; Fig. 4 shows a section of an exemplary embodiment of a packaging material web according to the invention; Fig. 5 shows a section of an exemplary embodiment of a packaging material web according to the invention; Fig. 6 shows a section of an exemplary embodiment of a packaging material web according to the invention; Fig. 7 shows a section of an exemplary embodiment of a packaging material web according to the invention; Fig. 8 shows a section of an exemplary embodiment of a packaging material web according to the invention; Fig. 9 shows a section of an exemplary embodiment of a packaging material web according to the invention.Fig. 10 an excerpt of an exemplary embodiment of a packaging material web according to the invention; Fig. 11 a sectional view of an exemplary embodiment of a packaging bag according to the invention filled with a packaging article; Fig. 12 a further sectional view of an exemplary embodiment of a packaging bag according to the invention filled with filling and / or cushioning material and two packaging articles; Fig. 13 a detail view according to excerpt XIII from . Fig. 11 ; Fig. 14 a detail view according to section XIV from Fig. 11Fig. 15 shows another exemplary sectional view of a packaging bag according to the invention, which is filled with one packaging article; Fig. 16 shows a sectional view of another exemplary embodiment of a packaging bag according to the invention filled with two packaging articles; Fig. 17 shows a perspective view of an exemplary embodiment of a packaging material blank according to the invention; and Fig. 18 shows a perspective view of an opened exemplary packaging bag according to the invention.

[0044] In the following description of exemplary embodiments of packaging material webs, packaging material blanks, and packaging material bags according to the invention, a packaging material web is generally designated by the reference numeral 1, a packaging material blank is generally designated by the reference numeral 100, and a packaging bag is generally designated by the reference numeral 200. For the following description of the exemplary embodiments of the invention shown in the figures, it is assumed that the packaging material web consists of paper or cardboard, in particular corrugated cardboard, although other packaging material web materials are also conceivable without deviating from the inventive concept. Identical or similar components of the individual embodiments are designated with the same or similar reference numerals.

[0045] In Fig. 1Figure 1 shows an exemplary embodiment of a section of a packaging material web 1 according to the invention in a top view of the packaging material web 1. The packaging material web 1 extends essentially in a straight line and defines a longitudinal web direction indicated by the arrow with the reference numeral L. The packaging material web 1 has a leading transverse edge 3, which is connected to two longitudinal edges 5, 7 oriented essentially perpendicular to the transverse edge 3. This results in a rectangular basic shape for the packaging material web 1 in the top view. A longitudinal edge strip 9, 11 adjoins each of the longitudinal edges 5, 7. These strips are oriented in the longitudinal web direction 11 and can have a width of at least 10 mm measured transversely to the longitudinal web direction L. The longitudinal edge strips 9, 11 are provided with a cold-sealable adhesive, which must be subjected to an external force to activate its adhesive effect.By bonding or sealing the longitudinal edge strips 9, 11 together, a packaging bag 200 according to the invention can be formed, which will be discussed in detail later. An application rate of the cold-sealable adhesive of at least 5 g / m², in particular at least 7 g / m², and especially at most 15 g / m², has proven advantageous for a reliable and lasting adhesive effect.

[0046] The packaging material web 1 has several transverse stripes 13, 15, 17 oriented transversely, in particular perpendicularly, to the web longitudinal direction L and arranged at equidistant intervals from one another, wherein in the section according to Fig. 1Only three transverse stripes are shown. The transverse stripes 13, 15, 17 are also coated with a cold-sealable adhesive. Each transverse stripe 13, 15, 17 terminates in the two longitudinal edge stripes 11, 9 opposite each other perpendicular to the web's longitudinal direction L, resulting in a repeating pattern or repeat of cold-sealable adhesive stripes, namely the longitudinal edge stripes 9, 11 and the transverse stripes 13, 15, 17. For example, the repeat has a rectangular basic shape. The area of ​​application of the cold-sealable adhesive and the dimensions of the transverse stripes 13, 15, 17 and the longitudinal edge stripes 9, 11 are dimensioned so that the surface of the packaging material web is essentially free of cold-sealable adhesive. This has the advantage that, firstly, a packaging article 203 to be packaged and, if necessary, shipped using the packaging material web 1 ( Fig. 11) does not come into contact with the cold-sealable adhesive, thus preventing the packaging material web 1 from adhering to the shipping item 203, even if it happens to also be coated with cold-sealable adhesive, and also saving on the amount of adhesive and thus reducing costs. In Fig. 1 This results in rectangular packaging material windows 19, 21, 23 (without adhesive layer), each surrounded by the transverse and longitudinal edge strips 13, 15, 17, 9, 11 which are provided with cold-sealable adhesive.

[0047] The packaging material web 1 according to the invention has at least one extending in the web longitudinal direction 11 and in Fig. 1A folding hinge 25 is arranged centrally with respect to a width of the packaging material web 1 measured transversely to the longitudinal direction L. The folding hinge 25 defines a folding axis, indicated by the reference numeral A, along which the packaging material web 1 can be folded. The folding hinge 25 divides the packaging material web 1 into two longitudinal web sections 27, 29 oriented in the longitudinal direction L, which are connected to each other by means of the folding hinge 25. To produce, for example, a packaging bag 200 according to the invention, the longitudinal web sections 27, 29 can be folded over and towards each other along the folding axis A of the folding hinge 25, so that the sections of the packaging material web, each provided with a cold-sealable adhesive, can be placed on top of each other and bonded or sealed together by external force.The folding hinge 25 is schematically represented by a dashed line and can, for example, be manufactured from a single piece with the longitudinal web sections 27, 29 and / or be designed as a film hinge. For example, the folding hinge 25 is realized as a material weakening, in particular as a perforation-material rib series, especially consisting of several alternating perforations and material ribs, or as a longitudinal groove. The folding hinge 25 can, for example, be created by external mechanical force, such as perforation, punching, or grooving. Fig. 1 It can be seen that the folding joint 25 is partially free of cold-sealable adhesive, namely in the area of ​​the packaging material windows 19, 21, and partially provided with cold-sealable adhesive, namely in the area of ​​the transverse strips 13, 15, 17.

[0048] In the Figs. 2 to 7Further embodiments of packaging material webs 1 according to the invention are shown, which differ essentially in the number and arrangement of the folding hinges 25. The multiple folding hinges 25 each extend essentially in the longitudinal web direction L and / or parallel to each other and each define a folding axis A along which the two adjacent longitudinal web sections 27, 29, 31, 33, separated by the respective folding hinge 25, can be folded over in order to form a packaging bag 200 and to create a packaging bag 200 that is as precisely fitting and / or true to shape as possible for the shipping item 203.

[0049] In Fig. 2The packaging material web 1 has a total of 3 folding hinges 25, with all three folding hinges 25 being located essentially in a central area of ​​the packaging material web 1. The two outer folding hinges 25 are each arranged at the same distance from the middle folding hinge 25.

[0050] In the Fig. 3 and 4 Further examples of packaging material webs 1 according to the invention are shown, each analogous to Fig. 2 three folding joints 25, wherein the folding joints 25 of the Fig. 4 evenly distributed across the longitudinal direction L of the web and inserted into the packaging material web 1, forming a folding joint 25 of the packaging material web 1. Fig. 3 is arranged essentially centrally with respect to the width of one of the longitudinal track sections 27, 29. The other two folding hinges 25 of the embodiment according to Fig. 3 are essentially analogous to the embodiment according to Fig. 2 and Fig. 4positioned.

[0051] The Figs. 5 to 7 further exemplary embodiments of the packaging material webs 1 according to the invention are shown, in which in the Fig. 5 and 7 evenly distributed folding joints 25 are provided and in Fig. 6 Irregularly distributed folding joints 25 are incorporated in the width direction. It should be clear that the number of folding joints 25 is not to be understood as limiting. In Fig. 5 The packaging material web 1 has, for example, five folding joints, in Fig. 6 The packaging material web 1 has, for example, six folding joints and in Fig. 7 For example, the packaging material web 1 has thirteen folding joints 25. Any number of folding joints greater than 1 is conceivable, for example a maximum of 20. The maximum number of folding joints 25 is determined by the width of the packaging material web 1 and the width of the individual folding joints 25.

[0052] In the Figs. 8 to 10Exemplary embodiments of packaging material webs 1 according to the invention are shown, which have additional structural features. Firstly, the packaging material webs 1 of the Figs. 8 to 10 In the area of ​​both longitudinal edges 5, 7 at the level of the transverse stripes 13, 15, 17, an indicator 35 is provided to indicate the respective transverse stripe 13, 15, 17. The indicators 35, which can generally be, for example, a material weakening or a color marking, are designed according to the Figs. 8 to 10 The indentations are essentially V-shaped or triangular in cross-section, identifiable both haptically and visually, but can also be square, rectangular, or circular in cross-section. The indicators 35 support a precise and length-specific packaging process, which is particularly advantageous for packaging items of varying sizes 203.

[0053] The packaging material webs 1 of the Figs. 8 and 9 Furthermore, the material weakening rows 37 oriented transversely to the web longitudinal direction L are oriented and can be formed, for example, as perforation-material ridge rows, in particular consisting of several alternating perforations and material ridges. It is also possible that the material weakening rows 37 are formed as grooves. Each of the material weakening rows 37 forms a predetermined tear line, which allows a sealed packaging bag 200 to be opened easily in order to provide access to the packaged article 203 contained in the packaging bag 200. The material weakening row 37 according to Fig. 8 as well as according to Fig. 9The strips are arranged trailing in the longitudinal direction L and at short intervals, particularly within a few millimeters, especially less than 10 mm, with respect to each transverse stripe 13, 15, 17 and / or oriented parallel to the transverse stripes 13, 15, 17. It is also possible to provide a tear strip for opening the packaging bag 200 (not shown).

[0054] The embodiment according to Fig. 9 differs from the embodiment according to Fig. 8This is achieved simply by incorporating a pair of material weakening rows 37 directly trailing each of the transverse strips 13, 15, 17 into the packaging material web 1. This further facilitates the opening process of the packaging bag. Between the parallel and / or essentially identical material weakening rows 37, a thin-walled, straight packaging material strip 39 is formed, which can be separated from the rest of the packaging material web 1 or torn off from the two adjacent material weakening rows 37 to open the packaging bag 200.

[0055] The packaging material web 1 according to Fig. 10 does not include any transverse material weakening rows 37. In the area of ​​the transverse stripes 13, 15, 17, indicators 35 are again 5, 7 incorporated into the packaging material web 1 at both longitudinal edges. The transverse stripes 13, 15, 17 in Fig. 10The transverse strips 13, 15, 17 are dimensioned larger in the longitudinal web direction L, meaning they are wider. Furthermore, the transverse strips 13, 15, 17 have sections 41, 43, 45 that are free of cold-sealable adhesive. This reduces adhesive consumption. It was also found that the adhesive-free sections 41, 43, 45 in the area of ​​the transverse strips 13, 15, 17 have a beneficial effect on wear and reduce the wetting of a cutting device for separating the packaging material web 1 with the cold-sealable adhesive layer. The width of the adhesive-free sections 41, 43, 45, measured transversely to the longitudinal web direction L, is such that they have essentially the same width as the packaging material windows 19, 21 and / or do not extend into the longitudinal edge strips 9, 11.This ensures continued reliable sealing of the longitudinal edge strips 9, 11 and thus reliable closure of the packaging material web 1 to form a sealed envelope for the packaging bag 200. The packaging material webs 1 of the . Figs. 8 to 10 Each has a folding joint 25, so that two longitudinal track sections 27, 29 are formed, which can be folded along the folding axis A defined by the folding joint 25 to form a packaging bag 200.

[0056] In the Figs. 11 and 12 Two packaging bags 200 according to the invention are shown in sectional view, wherein the packaging bag 200 is made of Fig. 11 open and the packaging bag 200 made of Fig. 12The packaging bag 200 comprises a cover 205 made of a packaging material web 1, for example, according to the invention. By means of a folding hinge 25 incorporated into the packaging material web 1, the two longitudinal web sections 27, 29 connected to the folding hinge 25 are folded to form the closed cover 205 along the folding axis A defined by the folding hinge 25, which is located in the Figs. 11 and 12 The folding hinge 25 forms a predefined fold 207, which points into a packaging cavity 209 bounded by the cover 205.

[0057] In the Figs. 11 and 12It can be seen that the packaging material web 1 is thin-walled and has a significantly larger dimension in the longitudinal and transverse directions than its material thickness. The longitudinal web sections 27, 29 conform to the packaging article 203 as precisely as possible under deformation, in particular bending. The cold sealing of the longitudinal edge strips 9, 11 using the cold-sealable adhesive, indicated by the reference numeral K, is shown in Fig. 11 Indicated: The two arrows indicated by reference numeral 211 symbolize the application of force to the two longitudinal edge strips 9, 11, so that when the two longitudinal edge strips 9, 11 come into contact under the influence of the external force 211, the cold-sealable adhesive K is activated, so that the longitudinal edge strips 9, 11 are bonded together and the casing 205 is sealed or closed.

[0058] The packaging bag 200 according to the invention is characterized, among other things, by the fact that an inner wall 213, 215, which delimits the packaging cavity 209 and points towards the packaging cavity 209, is partially free of a cold-sealable adhesive coating. In particular, that area of ​​the inner wall 213, 215 which can come into contact with the packaging article 203 is free of cold-sealable adhesive. In the embodiment according to Fig. 11 Only a narrow adhesive strip K is provided in the area of ​​the longitudinal edge strips 9, 11. The remaining surface of the packaging material web 1 is free of a cold-sealable coating, except for those specified in the Figs. 11 and 12 transverse strips 13, 15, 17 not shown for completely closing the cover 205 transverse to the longitudinal direction L.

[0059] The packaging bag 200 made of Fig. 12is shown in the fully manufactured or closed state. In contrast to the design according to the Fig. 11 Two shipping items 203 are located within the packaging cavity 209. Furthermore, the packaging cavity 209 is partially filled with filling and / or cushioning material, which is generally designated with the reference number 231, in order to protect the packaging items 203 from external influences and / or to fix the shipping items 203 in their position within the packaging cavity 209.

[0060] The Figs. 13 and 14 These represent exemplary possibilities for cold-sealing the longitudinal edge strips 9, 11 provided with cold-sealable adhesive K. The same is conceivable for the transverse strips 13, 15, 17. The longitudinal edge strips 9, 11 from the design according to Fig. 13 have been pressed together using a pressing tool with a smooth surface, while the longitudinal edge strips 9, 11 of the embodiment according to Fig. 14have been pressed using a pressing tool with a structured surface. This results in Fig. 14 a corrugated outer surface 217 of the cover 205 or the packaging bag 200 in the area of ​​the longitudinal edge strips 9, 11. The corrugated surface 217 comprises a depression-raised structure consisting of alternating depressions 219 and raised areas 221.

[0061] In the Figs. 15 and 16 Further exemplary embodiments of the packaging bags 200 according to the invention are shown. The packaging bags 200 according to the Figs. 15 and 16 This illustrates the advantageous property of the packaging bags 200 according to the invention, namely their ability to adapt to the shapes of the packaging items to be packaged. For example, from a comparison of the Fig. 11 and 15 , in which the packaged packaging articles 203 essentially have the same basic form, it is evident that by providing several: in Fig. 15 five; in Fig. 16three; predefined and incorporated folding folds 207 into the packaging material web 1 so that the cover 205 adapts much more closely to the outer shape of the packaging article 203.Each fold 207 resulting from a folding hinge 25 introduced into the packaging material web connects two folding wings of the packaging material web, each of which is realized by the longitudinal web sections 27, 29, 31, 33, so that by successively folding the packaging material web 1, for example starting with a central folding hinge 25 or also with an outer folding hinge 25, the packaging material web 1 folds around the packaging article 203 as precisely as possible and the longitudinal edge strips 9, 11 facing each other, which are provided with the cold-sealable adhesive, can be brought into contact with each other, so that under external pressure the longitudinal edge strips 9, 11 facing each other and transverse strip sections 13, 15, 17 can be glued together to seal the packaging bag 200 and form a closed cover 205.

[0062] Fig. 16Figure 1 shows an embodiment of a packaging bag 200 according to the invention, in whose packaging cavity 209 two packaging articles 203 arranged one above the other are received. Furthermore, the packaging bag has a total of three folding folds 207, each formed by a folding hinge 25 introduced into the packaging material web 1.

[0063] In Fig. 17 A packaging material blank 100 according to the invention for producing, for example, a packaging bag 200 according to the invention is shown. Essentially, a packaging material blank 100, already partially formed into a future packaging bag 200, is shown, forming a packaging material web 1 cut to a specific length L in the longitudinal direction. Fig. 17 The strips coated with cold-sealable adhesive K are not explicitly highlighted. The folding hinge 25, which defines the folding axis A, is indicated by a dashed line. As in Fig. 17 As can be seen, the packaging material web 1, in particular the packaging material web blank 100, is already partially folded along the folding axis A, so that two longitudinal web sections 27, 29, folded towards each other, are oriented at an angle to one another and are connected by the folding fold 207. The pre-formed and folded packaging material web blank section is marked with the reference numeral 103. A substantially undeformed and unfolded section 105 of the packaging material blank 100, trailing with respect to the longitudinal web direction L, folds continuously to an end 107 of the packaging material blank 100, such that the packaging material blank 100 essentially has the original width of the packaging material web 1.

[0064] In Fig. 18Figure 1 shows a perspective view of a packaging bag 200, for example, formed from a packaging material web 1 and / or a packaging material blank 100 according to the invention. The packaging bag 200 is opened along a material weakening row 37 introduced into the packaging material web 1 by tearing off a strip 223 of the packaging bag, so that the interior of the packaging and the packaging article 203 arranged in the packaging cavity are visible and accessible. The tearing off of the packaging bag strip 223 is indicated by the curved arrow with reference numeral 225. The material weakening row 37 defines two predetermined tear lines 227, 229 on both the remaining and torn packaging bag 200 and on the detached packaging bag strip 223, which were previously formed from a single piece and connected to each other.

[0065] Another exemplary embodiment of a packaging material web 1 according to the invention essentially corresponds to the embodiment according to Fig. 10 , however, it differs with regard to the transverse stripes 13, 15, 17. From a comparison with the embodiment of the Figure 10 It is evident that the packaging material web 1 has no markers 35 on the longitudinal edges 5, 7. The transverse strips 13, 15, 17 also have sections 41, 43, 45 that are free of cold-sealable adhesive. In contrast to the embodiment according to Figure 10, the width of the adhesive-free sections 41, 43, 45, measured transversely to the web longitudinal direction L, is such that it extends substantially completely along the width of the packaging material web 1 and thus projects into the longitudinal edge strips 9, 11 up to the longitudinal edges 5, 7.

[0066] 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 MARK LIST

[0067] 1 Packaging material web 3 Transverse edge 5, 7 Longitudinal edge 9, 11 Longitudinal edge strip 13, 15, 17 Transverse strip 19, 21, 23 Packaging material window 25 Folding hinge 27, 29, 31, 33 Longitudinal web section 35 Indicator 37 Material weakening row 39 Material strip 41, 43, 45 Section free of cold-sealable adhesive 100 Packaging material blank 103 Folded section 105 Unfolded trailing section 200 Packaging pocket 203 Packaging item 205 Sleeve 207 Folding fold 209 Packaging cavity 211 External force 213, 215 Inner wall 231 Filling and / or cushioning material 217 Surface 219 Recess 221 Raise 223 Packaging pocket strip 225 Arrow 227, 229 Intended tear line Longitudinal direction of the track, folding axis, cold-sealable adhesive layer

Claims

1. Packaging material web (1), in particular made of paper or cardboard, in particular corrugated cardboard, in which at least one longitudinal edge strip (9, 11) adjoining a longitudinal edge (5, 7) is provided at least in sections with an adhesive and which has at least one folding joint (25) which extends in the web longitudinal direction (L) and is arranged in particular centrally with respect to a width dimensioned transversely with respect to the web longitudinal direction (L) and which defines a folding axis (A) along which two longitudinal web sections connected by means of the folding joint (25) can be folded over, characterized in that the adhesive is cold-sealable and wherein the packaging material web (1) is free of cold-sealable adhesive at least in sections along the folding joint (25), wherein the cold-sealable adhesive is formed in such a way that a connection created therewith cannot be released in a non-destructive manner, wherein the folding joint (25) is realized as a longitudinal groove.

2. Packaging material web (1) according to Claim 1, wherein the folding joint (25) is produced from one piece with the longitudinal web sections and / or is formed as a film hinge.

3. Packaging material web (1) according to one of the preceding claims, which has a plurality of transverse strips (13, 15, 17) which are oriented transversely, in particular perpendicularly, with respect to the web longitudinal direction (L) and / or are arranged at an equidistant distance from one another and which are provided with a cold-sealable adhesive.

4. Packaging material web (1) according to Claim 3, wherein the transverse strips (13, 15, 17) each open into the two longitudinal edge strips (9, 11), wherein in particular a repeating, in particular rectangular or square, pattern of the longitudinal edge strips and transverse strips (13, 15, 17) provided with cold-sealable adhesive is formed.

5. Packaging material web (1) according to Claim 3 or 4, wherein the transverse strips (13, 15, 17), in particular in the region of at least one longitudinal edge strip, are provided with an indicator (35), such as a material weakening, in particular a perforation or a notch, or a color marking, for indicating the respective transverse strip.

6. Packaging material web (1) according to one of Claims 3 to 5, wherein the transverse strips (13, 15, 17), in particular between two indicators (35) each arranged on a longitudinal edge strip (9, 11), are free of cold-sealable adhesive at least in sections.

7. Packaging material web (1) according to one of the preceding claims, which has at least one material weakening row (37) oriented in the web longitudinal direction (L) and / or transversely with respect to the web longitudinal direction (L), such as a perforation-material web row in particular composed of a plurality of alternating perforations and material webs, or a groove, for forming a predetermined tear line.

8. Packaging material web (1) according to Claim 7, wherein in each case two transverse material weakening rows (37) which are formed in particular identically and are oriented parallel to one another are arranged directly adjacent to in each case one transverse strip (13, 15, 17), wherein in particular the packaging material web (1) defines a conveying direction and the two transverse material weakening rows (37) are arranged upstream and / or downstream of the transverse strip in the conveying direction.

9. Packaging material web (1) according to one of the preceding claims, wherein an amount of the cold-sealable adhesive is at least 5 g / m2 and in particular at most 15 g / m2 .

10. Packaging material web (1) according to one of the preceding claims, wherein a contrast agent is added to the cold-sealable adhesive.

11. Packaging material web (1) according to one of the preceding claims, which is hydrophobized, in particular glued.

12. Packaging bag (200) comprising a casing (205) made of a packaging material web (1) formed according to one of the preceding claims and made of cardboard, in particular corrugated cardboard, wherein the casing (205) is closed off by cold-sealing edge strips of the packaging material web (1) in order to form a packaging cavity and has at least one predefined folding fold (207) which is introduced into the packaging material web (1) and points into the packaging cavity (209), wherein an inner wall delimiting the packaging cavity (209) is free of a cold-sealable adhesive coating in regions and / or the folding fold (207) is free of a cold-sealable adhesive coating in sections.

13. Packaging bag (200) according to Claim 12, which has at least two, in particular three, four, five, six or more predefined folding folds (207) which are introduced into the packaging material web (1), are oriented parallel to one another and / or are set up in such a way that the packaging cavity (209) can be adapted to the packaging article to be packaged.

14. Packaging bag (200) according to Claim 12 or 13, in which the packaging cavity (209) is partially covered with filling material and / or upholstery material (231).

15. Packaging material blank (100) for producing a packaging bag (200) formed in particular according to one of Claims 12 to 14, wherein the packaging material blank (100) is produced by cutting to length a packaging material web (1) formed according to one of Claims 1 to 11 transversely with respect to the web longitudinal direction (L) and transversely with respect to the at least one folding joint (25).

16. Method for producing a packaging material blank for producing a packaging bag (200) formed in particular according to one of Claims 12 to 14, in which a packaging material web (1) formed according to one of Claims 1 to 11 is provided and cut to length transversely with respect to the web longitudinal direction (L) and transversely with respect to the at least one folding joint (25).