EP4157741A1

EP4157741A1 - Packaging material web, packaging pouch, packaging material blank and manufacturing method

Info

Publication number: EP4157741A1
Application number: EP21730158.9A
Authority: EP
Inventors: Bastian Schalk
Original assignee: Sprick Bielefelder Papier und Wellpappenwerke and Co GmbH
Current assignee: Sprick Bielefelder Papier und Wellpappenwerke and Co GmbH
Priority date: 2020-05-27
Filing date: 2021-05-27
Publication date: 2023-04-05
Also published as: WO2021239916A1; DE102020114211A1

Abstract

The present invention relates to a packaging material web, in particular made of paper or paperboard, in particular corrugated paperboard, wherein at least one longitudinal edge strip adjoining a longitudinal edge is provided at least in sections with a cold-sealing adhesive and has at least one folding joint extending in the longitudinal direction of the web, in particular centrally in relation to a width measured transverse to the longitudinal direction of the web, which folding joint defines a folding axis along which two longitudinal web sections connected by means of the folding joint can be folded, wherein the packaging material web is free of cold-sealing adhesive at least in sections along the folding joint.

Description

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

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

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

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

One object of the present invention is to improve the disadvantages of the prior art, in particular to develop a packaging material web, a packaging bag and a packaging material blank in such a way that these can be processed more easily and with less effort and / or better and more specifically to different ones Article sizes can be adjusted in particular to form a packaging bag.

The object is achieved by the subjects of claims 1, 13, 16, 17, 18 and 19, respectively. Thereafter, a packaging material web, in particular made of paper or cardboard, in particular corrugated cardboard, is provided. The packaging material web can be made of paper, such as recycled paper, in particular waste paper and / or 100% recyclable paper, which can be made without chemical-specific ingredients. Recycled paper is in particular paper materials with a small proportion (less than 50%) of fresh fiber-containing paper. For example, paper materials that contain 70% to 100% waste paper are used. The recycled paper for the purposes of this invention can be paper material that can have a tensile strength index along the machine direction of at most 90 Nm / g, preferably a tensile strength of 15 Nm / g to 60 Nm / g, and a tensile strength index transverse to the machine direction of at most 60 May have Nm / g, preferably a tensile strength of 5 Nm / g to 40 Nm / g. A standard DIN EN ISO 1924-2 or DIN EN ISO 1924-3 can be used to determine the tensile strength or the tensile strength index. Additionally or alternatively, a recycled paper property or waste paper property can be characterized by the so-called burst resistance. A material in this sense is recycled paper with a bursting index of at most 3.0 kPa * m ^A 2 / g, preferably with a bursting index of 0.8 kPa * m ^A 2 / g to 2.5 kPa * m ^A 2 / g. The DIN EN ISO 2758 standard is used to determine the bursting index. Furthermore, the packaging material has a mass per unit area 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 web or a zigzag-folded stack of packaging material, which is also referred to as a fan-fold stack.

The packaging material web extends in a longitudinal direction of the web and can have a constant web / material thickness or a constant width viewed transversely to the longitudinal direction of the web. In the width direction, the packaging material web ends in each case at a longitudinal edge extending in the longitudinal direction of the web or at a longitudinal edge. For example, be seated the packaging material web a width of at least 200 mm and in particular of at most 2000 mm. For example, the width is approximately 500 mm. At least one longitudinal edge strip adjoining a longitudinal edge is provided at least in sections with a cold-sealable adhesive. The width of the longitudinal edge strip provided 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 provided with cold-sealable adhesive.

The cold-sealable adhesive is able to produce a permanent connection between packaging material web surfaces. The cold-sealable adhesive, in particular the connection between two surfaces achieved by means of the cold-sealable adhesive, can be distinguished by the fact that the connection cannot be released without being destroyed. Furthermore, the cold-sealable adhesive can be characterized in that the with Cold-sealable adhesive provided and glued longitudinal edge strips cannot be peeled off or removed from one another without damaging or destroying the packaging material to be glued, in particular paper or cardboard, in particular corrugated cardboard. The cold-sealable adhesive can, for example, comprise latex and a polymer made from styrene acrylate, and optionally a proportion of 0.4% to 0.6% of a defoamer. An adhesive solids content can be, for example, 50% ± 10%, with the remainder being water. The cold-sealable adhesive can, for example, be applied to the at least one longitudinal edge strip by means of rollers, that is to say by roller application, which can consist for example of rubber, brass or copper, by spraying or by painting spray. For example, the cold-sealable adhesive is an aqueous dispersion based on natural latex. For example, commercially available cold seal adhesives can be used.

The packaging material web has at least one, in particular at least two, in particular three, four, five, six or more, folding hinge extending in the longitudinal direction of the web, in particular arranged centrally with respect to a width measured transversely to the longitudinal direction of the web. The folding joint defines a folding axis along which two longitudinal track sections connected by means of the folding joint can be folded over. In other words, the folding joint divides the packaging material web into two parallel to each other it stretching longitudinal web sections. The at least one folding joint enables an article to be packaged, such as a packaging and / or dispatch article, to be packaged or enveloped in a simple manner by means of the web of packaging material. After the longitudinal web sections have been folded over along the folding axis and moved towards one another and if necessary placed on top of one another, a permanent connection, in particular sealing treatment, of the two facing longitudinal web section surfaces can be established solely through the mutual contact of the longitudinal web section surfaces provided with adhesive. The cold-sealable adhesive can furthermore be set up in such a way that activation of the adhesive / sealing effect is necessary so that the adhesive develops its adhesive / sealing effect. Activation can be achieved, for example, by applying pressure from the outside, which causes the cold-sealable adhesive to develop its adhesive / sealing effect. The packaging and / or shipping item can thus be wrapped in a simple manner by means of the packaging material web. For example, it is not necessary to apply additional heat input and / or additional adhesive materials. The packaging material web according to the invention enables the productivity when packaging articles, such as packaging and / or shipping articles, to be increased significantly. Furthermore, packaging material can be saved, since multiple wrapping of the object to be protected can be dispensed with. Furthermore, a length of the packaging material web measured in the longitudinal direction of the web can be flexibly be matched and adjusted to the article to be packaged. Another advantage of cardboard, in particular corrugated cardboard, is that the cardboard already provides its own damping and thus protective effect for the article to be packaged.

According to the invention, the packaging material web is free of cold-sealable adhesive at least in sections along the folding hinge. Furthermore, it can be provided that the longitudinal track sections are largely free, 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% from cold-sealable adhesive. This saves adhesive material. Furthermore, it is ensured that when the article is packaged, in particular when the sheet of packaging material is closed to form a packaging pocket, as little as possible, 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 which are coated with cold-sealable adhesive enter into a permanent connection with the respective connection partner of the packaging material web. This also ensures that the packaging bag to be produced can be closed circumferentially by means of the cold-sealable adhesive, but is largely free of an adhesive layer. As a result, the packaging pocket that has been formed can be opened again in a simple manner in order to be able to remove the article from the packaging pocket again. For example, the packaging material web can be provided with one or more, a later sealing of the packaging material web to a packaging bag reinforcing means. For example, the packaging material web can have embossed lines or rows of, in particular, punctiform embossings that run in the longitudinal direction or transversely thereto, at least in sections, which are introduced from the outside, for example, by the action of mechanical force. Alternatively or in addition, the packaging material web can have a structuring that changes the fiber orientation at certain points or in sections, which can be implemented, for example, by the embossed lines or series of embossings. The embossed lines or embossing or structuring can be arranged in the area of the longitudinal edge strips and / or in the area of transverse, in particular perpendicular, transverse strips oriented to the direction of the web, the longitudinal edge strips and the transverse strips being provided with adhesive, which are in contact with one another to form a packaging pocket are brought to form a packaging bag, which is done by activating the adhesive. The embossed lines, embossing or structuring reinforce the sealing of the packaging bag. For example, this can be achieved by means of a form fit, in particular by means of an embossing or structuring of the longitudinal edge strips or transverse strips that are to be sealed with one another, which are matched to one another in terms of shape. According to an exemplary embodiment of the packaging material web according to the invention, the folding joint is made in one piece with the longitudinal web sections. For example, the folding hinge can be introduced into the packaging material web from the outside, in particular starting from a surface of the packaging material web. Furthermore, the folding joint can be designed as a film hinge. The film hinge can be implemented, for example, as a thin-walled connection, for example in the form of a fold, in particular 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 in the range from 30 to 75%. According to an exemplary development, the folding joint and / or the film hinge allows the longitudinal track sections to be folded over around the folding axis in only one direction. That surface of the packaging material web on which the folding hinge is formed forms the interior of the packaging bag in the packaging bag.

In a further exemplary embodiment of the packaging material web according to the invention, the folding joint is implemented as a material weakening. The material weakening can, for example, be a row of perforations and material webs, in particular composed of several alternating perforations and material webs. For example, the perforations and material webs have the same dimensions. Furthermore, it can be provided that the perforations are at least twice as long as the material webs which are arranged between two adjacent perforations. Alternatively, the folding joint can also be implemented as a longitudinal groove. Both the material weakening and the longitudinal groove are characterized in that the longitudinal track sections are defined along the material weakening or the longitudinal groove and can be folded over with less effort. The longitudinal groove is produced for example by the action of mechanical force from the outside, for example by means of a creasing, stamping or punching tool.

According to an exemplary development of the packaging material web according to the invention, the packaging material web has several transverse, in particular perpendicular, longitudinally oriented and / or equidistantly spaced transverse strips to the web, which are provided with a cold-sealable adhesive. The cold-sealable adhesive can be applied in the same way as with the longitudinal edge strip. Due to the transverse strips evenly distributed in the longitudinal direction of the web, the packaging material web can be closed and / or glued to the longitudinal edge strips as well as to the transverse strips to form a closed envelope, in particular a packaging bag. For example, the distance between the transverse strips can be dimensioned in accordance with a standard for shipping packages, for example a DHL package. In a further exemplary embodiment of the web of packaging material according to the invention, the transverse strips each open into at least one, preferably into both, longitudinal edge strips. For example, the packaging material web can have a repeating pattern, repeat or grid of the longitudinal edge and transverse strips provided with cold-sealable adhesive, the pattern having rectangular, in particular square, adhesive windows that form the pattern or the grid. It can thus be provided that the packaging material web between the longitudinal edge and transverse strips is essentially free of the cold-sealable adhesive, in particular over a large area. The pattern or the repeat can either develop uniformly or change in the longitudinal direction of the web, wherein the pattern or repeats can be dimensioned in such a way that they are also matched to items of predetermined size and / or in relation to standardized sizes, for example a DHL package .

In a further exemplary embodiment of the present invention, the transverse strips, in particular in the region of at least one longitudinal edge strip, in particular on the corresponding longitudinal edge, are provided with an indicator for displaying the respective cross section. The indicator simplifies the production of a packaging material blank, from which, for example, a packaging bag can be created, and / or a packaging bag. The indicator can, for example, be a material weakening, in particular a perforation or a notch from the outside, or a color marking. The indicator can be set up to be detectable, so that automated production and packaging is possible or simplified. The indicator enables a tailor-made and length-specific packaging process for items of different sizes.

According to an exemplary development, the transverse strips, in particular between two indicators each arranged on a longitudinal edge strip, are at least in sections free of cold-sealable adhesive. This reduces the consumption of adhesive and reduces the cost of the packaging material web. It was also found that the adhesive-free areas within the transverse strips lead to reduced wear and / or reduced wetting of a cutting device, such as a cutter of a cutting station, with the adhesive layer.

In a further exemplary embodiment of the material web according to the invention, the packaging material web has at least one row of material weakenings oriented in the longitudinal direction and / or transversely to the web in order to form a nominal tear line. The material weakening row can for example be formed as a perforation-material web row in particular special from several alternating perforations and material webs or as a groove, for example by punching or embossing. In particular, it is at least a row of material weaknesses is arranged on the packaging material web surface opposite with respect to the folding hinge. The row of weaknesses in material can be arranged immediately adjacent to a transverse strip. The row of weaknesses in the material can be spaced apart from the transverse strip in the range of a few millimeters, for example by a maximum of 15 mm. The series of material weaknesses enables a simple, defined opening of a packaging bag made from the packaging material web for access to the article packaged therein. For example, two rows of material weaknesses that extend parallel to one another and are, for example, identical, can be provided and are arranged at a distance from one another in the longitudinal direction of the web that a particularly thin strip of packaging material extends between the rows of material weaknesses and extends transversely to the longitudinal direction of the web and is separated from the rest of the The web of packaging material can be severed, as torn off, in order to open the packaging pocket formed from the web of packaging material, so that access to the article is enabled. According to an exemplary development, two in particular identically formed and / or parallel rows of transverse material weakenings are arranged directly adjacent to one transverse strip in each case. In the present case, immediately adjacent is to be understood as meaning that a distance between the transverse strip and the more distant transverse

Material weakening row is a maximum of 20 mm. Furthermore, it can be provided that the packaging material web defines a conveying direction in which the packaging material web is conveyed away, for example, by a packaging material supply, which for example can have a roll form or a stack form, for example through the fanfold, and is possibly conveyed to a packaging material production machine, and the two rows of transverse material weakening are arranged upstream and / or downstream of the transverse strip.

In a further exemplary embodiment of the present invention, an amount of the cold-sealable adhesive is at least 3 g / m ² , in particular at least 7 g / m ² , and in particular at most 15 g / m ² . It has been found that the specified amount of adhesive is advantageous for a good adhesive effect and / or a secure closure of the packaging material web to form a packaging bag.

According to an exemplary development of the packaging material web according to the invention, the cold-sealable adhesive is mixed with a contrast medium. For example, the contrast agent is set up to make the adhesive and thus the longitudinal edge and / or transverse stripes visually identifiable. This facilitates the packaging process, in particular the automatic ones. The contrast agent can be set up, for example, to be able to be identified by optical sensors. For example, the detection the contrast agent of the adhesive trigger an action, for example a packaging material manufacturing machine, such as cutting the packaging material web to length and / or applying pressure from the outside in order to connect the longitudinal edge strips to one another by means of the cold-sealable adhesive. In a further exemplary development of the packaging material web according to the invention, it is hydrophobized, in particular glued. Especially in the case of sheets of packaging material made of paper or cardboard, the hydrophobization has proven to be advantageous with regard to the absorbency of the packaging material sheet in order to improve the coating with the cold-sealable adhesive, in particular to increase the crosslinking between the packaging material sheet material and the adhesive material . Sizing is generally understood in the paper industry to mean the water repellency of paper fibers. Sizing can reduce an internal surface tension of the paper material and thus reduce capillarity. On the other hand, the glue also seals so-called fiber-to-fiber binding parts, so that the tearability of the web of packaging material made of paper is increased.

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 are generally used to completely and / or protectively surround an article, such as a shipping article, so that it can be shipped, for example. In the case of packaging bags, there is a fundamental interest in keeping the packaging bag as small as possible, as precisely as possible to match the item to be packaged and possibly sent, so that the material required for the packaging bag can be kept small.

The packaging bag according to the invention comprises a sleeve or a casing made of a packaging material web formed in particular according to one of the above aspects or exemplary embodiments. The packaging material web and thus the envelope can for example be made of paper or cardboard, in particular corrugated cardboard.

To form a packaging cavity, the casing is closed by cold sealing of edge strips of the packaging material web and has at least one predefined folding fold introduced into the packaging material web. For cold sealing of the edge strips, for example of two longitudinal edge strips and two transverse strips each, the corresponding edge or transverse strips can be provided with a cold-sealable adhesive. The envelope is completely closed, so that a closed packaging cavity is created for the article to be packaged and possibly shipped. The circumferential edge that closes the packaging cavity is formed partly by the fold and partly by the cold-sealed edge strips. In case that the packaging bag has, for example, a rectangular basic shape, one edge is formed by the folding fold and the three other edges are grazed by cold-sealed edges. The fold can, for example, be introduced into the packaging material web beforehand as a material weakening, in particular as a row of perforations and material webs, in particular made up of several alternating perforations and material webs, or as a longitudinal groove, for example by embossing, punching or grooving. The folding fold can subdivide the packaging material web into two longitudinal web sections, which are folded over to form the packaging bag along the folding fold defining a fold axis and are cold-sealed to one another at their ends. The folding fold points into the packaging cavity.

The packaging bag is characterized in that an inner wall delimiting the packaging cavity and / or the folding fold in sections is free of a cold-sealable adhesive coating. The inner wall is formed by a packaging material web surface, in particular that surface in which the fold is made.

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 folding folds introduced into the packaging material web. The folding folds are oriented parallel to one another and / or in the longitudinal direction of the web. Due to the increased number of predefined folding folds, the packaging bag shape can be flexibly and easily adapted to the article to be packed. For example, the at least two folding folds are set up in such a way that the packaging cavity can be adapted to the packaging article to be packaged. For example, all of the folding folds point into the packaging cavity and each connect two longitudinal track sections of the packaging material web to one another, which delimit the packaging cavity. It was found that, with articles that get larger, a higher number of folds has a beneficial effect on the article being packaged with a precise shape and / or fit, as well as saving packaging material.

According to an exemplary development of the packaging bag according to the invention, the packaging cavity is partially occupied by filling and / or cushioning material. The filling and / or cushioning material can for example consist of paper or cardboard, in particular Wellpap pe, or other packaging materials. The filling and / or cushioning material protects the packaged and possibly to be shipped article within the packaging cavity while providing a cushioning and cushioning effect. According to a further aspect of the present invention, which can be combined with the preceding aspects and exemplary embodiments, a packaging material is Section provided for the production of a packaging bag designed in particular according to one of the aspects or exemplary embodiments described above. The packaging material blank according to the invention is produced by cutting to length, in particular cutting off, tearing off, a packaging material web according to the invention transversely to its longitudinal direction and transversely to the at least one folding joint. The packaging material blanks can be sized according to the standardized packaging, such as a DHL package. The packaging material blank according to the invention can be processed further in a simple manner into a packaging bag according to the invention in particular. To pack an article, it is placed on the packaging material blank and the packaging material blank is folded over along the folding fold or the folding joint to form a closed packaging cavity so that the longitudinal edge strips provided with cold-sealable adhesive face each other. By applying pressure from the outside, the cold-sealable adhesive can be activated in a simple manner without the aid of further packaging aids and / or an additional heat input, so that the longitudinal edge strips are sealed together. As a result, a closed envelope is formed which delimits the packaging cavity and is placed around the article.

According to a further aspect of the invention, which can be combined with the preceding aspects and exemplary embodiments, there is a method for producing a packaging material web, in particular designed according to one of the previously described aspects or exemplary embodiment, made for example of paper or cardboard, in particular corrugated cardboard , exists, created.

In the method, a web-shaped packaging material, for example paper or cardboard, in particular corrugated cardboard, is provided. Furthermore, at least one longitudinal edge strip adjoining a longitudinal edge of the web-shaped packaging material, in particular both longitudinal edge strips, is provided at least in sections with a cold-sealable adhesive. With regard to the cold-sealable adhesive and the longitudinal edge strips, reference can be made to the preceding statements. According to the invention, the web-shaped packaging material is weakened, in particular in the center 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 joint extending in the longitudinal direction of the web. For example, the web-shaped packaging material is perforated, embossed, punched and / or grooved. According to an exemplary 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 in accordance with one of the previously described aspects or exemplary embodiments.

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 designed in particular according to one of the previously described aspects or exemplary embodiments is created.

In the case of the method, a packaging material web, in particular designed according to one of the previously described aspects or exemplary embodiments, is provided, which consists, for example, of paper or cardboard, in particular corrugated cardboard. Furthermore, at least one folding fold is introduced into the web of packaging material. This acts as a folding joint and defines a folding axis along which two longitudinal web sections of the packaging material web connected by means of the folding fold can be folded over.

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

According to an exemplary development, the method can be carried out in such a way that a packaging bag designed according to one of the above aspects or exemplary embodiments is produced.

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 created which is set up to produce a packaging bag designed in particular according to one of the above aspects or exemplary embodiments . In the method, a packaging material web according to the invention is provided and cut to length, in particular cut off or torn off, transversely to the longitudinal direction of the web and transversely to the at least one folding joint.

Preferred embodiments are given in the subclaims.

In the following, further properties, features and advantages of the invention will become clear by means of a description of preferred embodiments of the invention with reference to the accompanying exemplary drawings, in which:

1 shows a detail of an exemplary embodiment of a packaging material web according to the invention; 2 shows a detail of an exemplary embodiment of a packaging material web according to the invention;

3 shows a detail of an exemplary embodiment of a packaging material web according to the invention;

4 shows a detail of an exemplary embodiment of a packaging material web according to the invention;

5 shows a detail of an exemplary embodiment of a packaging material web according to the invention;

6 shows a detail of an exemplary embodiment of a packaging material web according to the invention;

7 shows a detail of an exemplary embodiment of a packaging material web according to the invention;

8 shows a detail of an exemplary embodiment of a packaging material web according to the invention;

9 shows a detail of an exemplary embodiment of a packaging material web according to the invention;

10 shows a detail of an exemplary embodiment of a packaging material web according to the invention;

Fig. Li is a sectional view of an exemplary embodiment of a packaging bag filled with a packaging article according to the invention;

12 shows 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;

13 shows a detailed view according to section XIII from FIG. 11;

14 shows a detailed view according to section XIV from FIG. 11;

15 shows a further exemplary sectional view of a packaging bag according to the invention, which is covered with a packaging article;

16 shows a sectional view of a further exemplary embodiment of a packaging bag according to the invention loaded with two packaging articles; 17 shows a perspective view of an exemplary embodiment of a packaging material blank according to the invention; and

18 shows a perspective view of a torn open exemplary packaging bag according to the invention.

In the following description of exemplary embodiments of packaging material webs according to the invention, packaging material blanks according to the invention and packaging material bags according to the invention, a packaging material web according to the invention is generally provided with the reference number 1, a packaging material blank according to the invention is generally provided with the reference number 100 and a packaging bag according to the invention is generally provided with the reference number 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, other packaging material web materials are also conceivable without deviating from the concept of the invention. The same or similar components of the individual Ausfüh approximately examples are provided with the same or similar reference numerals.

1 shows an exemplary embodiment of a section of a packaging material web 1 according to the invention in a plan view of the packaging material web 1. The packaging material web 1 extends essentially in a straight line and defines a longitudinal direction of the web indicated by means of the arrow with the reference character 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 of the packaging material web 1 in the plan view. The longitudinal edges 5, 7 are each followed by a longitudinal edge strip 9, 11, which are oriented in the longitudinal direction of the web 11 and can have a width of at least 10 mm measured transversely to the longitudinal direction L of the web . The longitudinal edge strips 9, 11 are provided with a cold-sealable adhesive which, in order to activate its adhesive effect, has to be subjected to a force from the outside. By gluing or sealing the longitudinal edge strips 9, 11 to one another, a packaging bag 200 according to the invention, for example, can be formed, which will be discussed in detail later. An application amount of the cold-sealable adhesive of at least 5 g / m ² , in particular of at least 7 g / m ² , and in particular at most 15 g / m ² for a reliable and lasting Klebewir effect has proven advantageous.

The packaging material web 1 has several transversely, in particular perpendicular, to the longitudinal direction L of the web and arranged at equidistant distances from one another Querstrei fen 13, 15, 17, only three transverse stripes are shown in the section according to FIG. 1. The horizontal strips 13, 15, 17 are also covered with a cold-sealable adhesive. hen. Each transverse strip 13, 15, 17 opens into the two longitudinal edge strips 11, 9 opposite each other transversely to the longitudinal direction L of the web, so that a repeating pattern or a repeat of cold-sealable adhesive strips results, namely through the longitudinal edge strips 9, 11 and the transverse strips 13, 15, 17. For example, the repeat has a rectangular basic shape. The areal application amount of the cold-sealable adhesive or the dimensions of the transverse strips 13, 15, 17 or the longitudinal edge strips 9, 11 are dimensioned so that the packaging material web surface is essentially free of cold-sealable adhesive. This has the advantage that, on the one hand, a packaging article 203 (FIG. 11) that is to be packaged and possibly dispatched by means of the packaging material web 1 does not come into contact with the cold-sealable adhesive, so that it can be ruled out that the packaging material web 1 does not stick to the dispatch article 203 adheres, even if it happens to be provided with cold-sealable adhesive, and on the other hand that the amount of adhesive can be saved and thus costs can be reduced. In Fig. 1 there are thus rectangular packaging material windows 19, 21, 23 (without adhesive layer), each of which is bordered by the transverse and longitudinal edge strips 13, 15, 17, 9, 11 provided with cold-sealable adhesive.

The packaging material web 1 according to the invention has at least one folding hinge 25 which extends in the longitudinal direction 11 and is arranged centrally in FIG. The folding joint 25 defines a folding axis, which is indicated by the reference symbol A, along which the packaging material web 1 can be folded. The folding joint 25 divides the packaging material web 1 into two longitudinal web sections 27, 29 which are oriented in the longitudinal direction L and which are connected to one another by means of the folding joint 25. To produce a packaging bag 200 according to the invention, for example, the longitudinal track sections 27, 29 can be folded over and towards one another along the folding axis A of the folding hinge 25, so that the sections of the packaging material web provided with cold-sealable adhesive can be placed on top of one another and with the action of external force can be glued or sealed to each other. The folding joint 25 is shown schematically by a dashed line, can for example be made from one piece with the longitudinal track sections 27, 29 and / or designed as a film hinge. For example, the folding joint 25 is implemented as a material weakening, in particular as a perforation / material web row, in particular composed of several alternating perforations and material webs, or as a longitudinal groove. The folding hinge 25 can for example be generated by the action of mechanical force from the outside, for example by perforating, punching or grooving. In Fig. 1 it can be seen that the folding hinge 25 is free of cold-sealable adhesive in sections, namely in the area of the packaging material windows 19, 21, and is provided in sections with cold-sealable adhesive, namely in the area of the transverse strips 13, 15, 17. 2 to 7 show further exemplary embodiments for packaging material webs 1 according to the invention, which differ essentially in the number and arrangement of the folding joints 25. The several folding joints 25 each extend essentially in the longitudinal direction L of the web and / or parallel to one another and each define a folding axis A along which the two adjacent longitudinal web sections 27, 29, 31, 33 separated from the respective folding joint 25 can be folded over, on the one hand to form a packaging bag 200 and on the other hand to create a packaging bag 200 for the shipping item 203 that is as precisely fitting and / or true to shape as possible.

In FIG. 2, the packaging material web 1 has a total of 3 folding joints 25, all three folding joints 25 being introduced essentially in a central region of the packaging material web 1. The two outer folding joints 25 are each arranged at the same distance from the middle folding joint 25.

3 and 4 show further examples of packaging material webs 1 according to the invention, each having three folding joints 25 analogously to FIG. 2, the folding joints 25 of FIG are introduced and a folding hinge 25 of the packaging material web 1 from Fig. 3 is arranged essentially centrally in relation to a width of one of the Längbahnab sections 27, 29. The other two folding joints 25 of the embodiment according to FIG. 3 are positioned essentially analogously to the embodiment according to FIGS. 2 and 4.

5 to 7 show further exemplary embodiments of packaging material webs 1 according to the invention, in which evenly distributed folding joints 25 are provided in FIGS. 5 and 7 and folding joints 25 distributed irregularly in the width direction are introduced. It should be understood that the number of folding joints 25 should not 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, the packaging material web 1 has, for example, thirteen folding joints 25. Any number of folding joints greater than 1 is conceivable, for example a maximum 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 Faltge joints 25.

In FIGS. 8 to 10, exemplary embodiments of packaging material webs 1 according to the invention are shown, which have additional structural features. On the one hand, the packaging material webs 1 of FIGS. 8 to 10 in the region of both longitudinal edges 5, 7 at the level of the transverse strips 13, 15, 17 each have an indicator 35 for displaying the respective transverse strip 13, 15, 17 Generally, for example, a material weakening or a color marking are shown in FIGS. 8 to 10 as in FIG Cross-section essentially V-shaped or triangular-shaped notches are realized, which are identifiable both haptically and visually, but can also be square, rectangular or circular in cross-section. The indicators 35 support a precisely fitting and length-specific packaging process, which has an advantageous effect in particular in the case of packaging articles 203 of different sizes.

The packaging material webs 1 of FIGS. 8 and 9 also have material weakening rows 37 oriented transversely to the web longitudinal direction L, which can be formed, for example, as perforation material web rows, in particular from several alternating perforations and material webs. It is also possible for the rows of material weakening 37 to be designed as grooves. The rows of material weaknesses 37 each form a predetermined tear line which enables a closed packaging bag 200 to be opened in a simple manner in order to provide access to the packaging article 203 packaged in the packaging bag 200. The material weakening row 37 according to FIG. 8 as well as according to FIG. 9 are viewed in the web longitudinal direction L trailing and at a short distance, in particular in the range of a few millimeters, in particular less than 10 mm, with respect to a respective transverse strips 13, 15, 17 and arranged / or oriented parallel to the transverse strips 13, 15, 17. It is also possible to provide a tear cord for opening the packaging bag 200 (not shown).

The embodiment according to FIG. 9 differs from the embodiment according to FIG. 8 only in that a pair of material weakening rows 37 are introduced into the packaging material web 1 immediately following one of the transverse strips 13, 15, 17. In this way, the opening process of the packaging bag can be made even easier. A thin-walled, straight packaging material strip 39 is produced between the parallel oriented and / or essentially identical rows of material weaknesses 37, which can be separated from the remaining packaging material web 1 or torn from the two adjacent rows of material weaknesses 37 in order to open the packaging pocket 200 .

The packaging material web 1 according to FIG. 10 does not include any transverse material weakening rows 37. In the area of the transverse strips 13, 15, 17 indicators 35 are again introduced into the packaging material web 1 on both longitudinal edges 5, 7. The transverse strips 13, 15, 17 in FIG. 10 are dimensioned larger in the longitudinal direction L of the web, that is, formed broadly ter. Furthermore, the transverse strips 13, 15, 17 have sections 41, 43, 45 which are free of cold-sealable adhesive. This can reduce the amount of adhesive used. It was also found that the adhesive-free sections 41, 43, 45 in the area of the transverse strips 13, 15, 17 advantageously affect wear and tear and reduce the wetting of a cutting device for separating the packaging material web 1 with the turn out to be cold-sealable adhesive layer. A width of the adhesive-free sections 41, 43, 45 measured transversely to the longitudinal direction L of the web is dimensioned such that these have essentially the same width as the packaging material windows 19, 21 and / or do not protrude into the longitudinal edge strips 9, 11. This also ensures reliable sealing of the longitudinal edge strips 9, 11 and thus reliable closing of the packaging material web 1 to form a closed cover for the packaging bag 200. The packaging material webs 1 of FIGS. 8 to 10 each have a folding joint 25, so that two longitudinal web sections 27, 29 are formed, which can be folded over along the folding axis A defined by the folding joint 25 to form a packaging bag 200.

11 and 12 show two packaging bags 200 according to the invention in sectional view, the packaging bag 200 from FIG. 11 being open and the packaging bag 200 from FIG. 12 being closed and cold-sealed. The packaging bag 200 comprises an envelope 205 made of a packaging material web 1 according to the invention, for example. By means of a folding hinge 25 introduced into the packaging material web 1, the two longitudinal track sections 27, 29 connected to the folding hinge 25 are arranged along the folding axis A defined by the folding hinge 25 to form the closed envelope 205 , which is oriented in FIGS. 11 and 12 in the plane of the drawing, folded over. The folding hinge 25 forms a predefined folding fold 207 which points into a packaging cavity 209 delimited by the envelope 205.

In FIGS. 11 and 12 it can be seen that the packaging material web 1 is thin-walled and has a significantly larger dimension in the longitudinal direction of the web and transversely to the longitudinal direction of the web than its material thickness. The longitudinal track sections 27, 29, with deformation, in particular bending, lie against the packaging article 203 with as precise a shape as possible. The cold sealing of the longitudinal edge strips 9, 11 by means of the cold-sealable adhesive, which is indicated with the reference symbol K, is indicated in FIG. 11: The two arrows indicated by means of the reference symbol 211 symbolize an application of force to the two longitudinal edge strips 9, 11, so that at Contact of the two longitudinal edge strips 9, 11 is activated under the influence of the external force 211, the cold-sealable adhesive K, so that the longitudinal edge strips 9, 11 are glued together and the envelope 205 is sealed or closed.

The packaging bag 200 according to the invention is characterized, inter alia, in that an inner wall 213, 215 which delimits the packaging cavity 209 and points in the direction of the packaging cavity 209 is free of a cold-sealable adhesive coating in some areas. In particular, that area of the inner wall 213, 215 is free of cold-sealable adhesive that comes into contact with the packaging article 203. long can. In the embodiment according to FIG. N, 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, with the exception of the transverse strips 13, 15, 17, not shown in FIGS. 11 and 12, for completely closing the casing 205 transversely to the longitudinal direction L of the web.

The packaging bag 200 from FIG. 12 is shown in the completely manufactured or closed state. In contrast to the embodiment according to FIG. 11, there are two shipping articles 203 within the packaging cavity 209. Furthermore, the packaging cavity 209 is partially occupied by filling and / or cushioning material, which is generally provided with the reference numeral 231, around the To protect packaging articles 203 from external influences and / or to fix the shipping articles 203 in their position within the packaging cavity 209.

13 and 14 illustrate exemplary possibilities for cold sealing the longitudinal edge strips 9, 11 provided with cold sealable adhesive K. The same is also conceivable for the transverse strips 13, 15, 17. The longitudinal edge strips 9, 11 from the embodiment according to FIG. 13 have been pressed using a pressing tool with a smooth surface, while the longitudinal edge strips 9, 11 of the embodiment according to FIG. 14 have been pressed using a pressing tool with a structured surface. This results in a corrugated outer surface 217 of the sleeve 205 or the packaging bag 200 in the area of the longitudinal edge strips 9, 11 in FIG. 14. The corrugated surface 217 comprises a depression-elevation structure of alternating depressions 219 and elevations 221.

15 and 16 show further exemplary embodiments of packaging bags 200 according to the invention. The packaging bags 200 according to FIGS. 15 and 16 illustrate the advantageous property of packaging bags 200 according to the invention of being able to adapt to the packaging article shapes to be packaged. For example, from a synopsis of FIGS. 11 and 15, in which the packaged packaging articles 203 have essentially the same basic shape, it can be seen that by providing several: in FIG. 15 five; in Fig. 16 three; Predefined folding folds 207 made in the packaging material web 1, the casing 205 adapts itself significantly closer to the outer shape of the packaging article 203. Each folding fold 207 resulting from a respective folding joint 25 introduced into the packaging material web connects two folding wings of the packaging material web to one another, which are each implemented by the longitudinal web sections 27, 29, 31, 33, so that by successively folding over the packaging material web 1, for example starting with a central one Folding hinge 25 or with an outer folding hinge 25, the packaging material web 1 is as precisely as possible in shape around the packaging item 203 and the facing longitudinal edge strips 9, 11, which with the cold seal capable adhesive are provided, can be brought into contact with one another, so that the facing longitudinal edge strips 9, 11 and transverse strip sections 13, 15, 17 can be glued to one another, in each case with the application of pressure from the outside, in order to seal the packaging bag 200 and to form a closed envelope 205 form. 16 shows an embodiment of a packaging bag 200 according to the invention, in the packaging cavity 209 of which 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.

FIG. 17 shows a packaging material blank 100 according to the invention for producing a packaging bag 200 according to the invention, for example. What can essentially be seen is a packaging material blank 100 which has already been partially reshaped into a later packaging bag 200 and which forms a packaging material web 1 cut to a specific length in the longitudinal direction L of the web. In FIG. 17, the strips provided with cold-sealable adhesive K are not explicitly highlighted. The folding joint 25, which defines the folding axis A, is indicated by means of a dashed line. As can be seen in Fig. 17, the packaging material web 1, in particular the packaging material web blank 100, is partially already folded over along the folding axis A, so that two longitudinal web sections 27, 29 folded onto one another are oriented at an angle to one another and through the folding fold 207 with one another are connected. The already preformed and folded over packaging material web blank section is provided with the reference number 103. An essentially undeformed and unfolded section 105 of the packaging material blank 100, which follows in relation to the longitudinal direction L of the web, folds continuously up to an end 107 of the packaging material blank 100 in that the packaging material blank 100 essentially has the original width of the packaging material web 1.

In FIG. 18, a packaging bag 200 formed, for example, from a packaging material web 1 according to the invention and / or a packaging material blank 100 according to the invention is shown in a perspective view. The packaging pocket 200 is opened along a line of weaknesses 37 introduced into the packaging material web 1, with a packaging pocket strip 223 being torn off, so that the packaging interior and the packaging article 203 arranged in the packaging cavity can be seen and accessed. The separation of the packaging pocket strip 223 is indicated by the curved arrow with the reference number 225. The material weakening row 37 defines two nominal tear lines 227, 229, which were previously formed from one piece and connected to one another, on the remaining and torn packaging pouch 200 as well as on the separated packaging pouch strip 223. Another exemplary embodiment of a packaging material web 1 according to the invention corresponds essentially to the embodiment according to FIG. 10, but differs with regard to the transverse strips 13, 15, 17. A comparison with the embodiment of FIG has no markers 35 on the longitudinal edges 5, 7. The transverse strips 13, 15, 17 also have sections 41, 43, 45 which are free of cold-sealable adhesive. In contrast to the embodiment according to FIG. 10, a width of the adhesive-free sections 41, 43, 45 measured transversely to the longitudinal direction L of the web is dimensioned such that they extend essentially completely along the width of the packaging material web 1 and thus into the longitudinal edge strips 9, 11 up to the longitudinal edges 5, 7 protrude.

The features disclosed in the above description, the figures and the claims can be important both individually and in any combination for the realization of the invention in the various configurations.

REFERENCE LIST

1 sheet of packaging material

3 horizontal margin

5, 7 longitudinal edge 9, n longitudinal edge strip

13, 15, 17 horizontal strips 19, 21, 23 packaging material window 25 folding hinge

27, 29, 31, 33 longitudinal track section

35 indicator

37 Series of material weaknesses

39 strips of material

41, 43, 45 Section free of cold-sealable adhesive 100 blank of packaging material

103 folded over section

105 unfolded trailing section

200 packing bag

203 packaging items

205 envelope

207 folding fold

209 packaging cavity

211 external force

213, 215 inner wall 231 filling and / or cushioning material 217 surface

219 deepening

221 survey

223 Packaging pocket strips 225 arrow

227, 229 nominal tear line

L longitudinal direction of the web

A fold axis cold sealable adhesive layer

Claims

EXPECTATIONS

1. Packaging material web (l) in particular made of paper or cardboard, insbesonde re corrugated cardboard, in which at least one longitudinal edge strip (9, 11) adjoining a longitudinal edge (5, 7) is at least partially provided with a cold-sealable adhesive and at least one is in In the longitudinal direction (L) of the web, in particular in the middle with respect to a width measured transversely to the longitudinal direction of the web (L), the folding joint (25) defines a folding axis (A) along which two longitudinal web sections connected by means of the folding joint (25) are folded over can be, the packaging material web (1) at least in sections along the folding hinge (25) is free of cold-sealable adhesive.

2. Packaging material web (1) according to claim 1, wherein the folding hinge (25) is made in one piece with the longitudinal web sections and / or is designed as a film hinge.

3. Packaging material web (1) according to one of the preceding claims, wherein the folding hinge (25) is implemented as a material weakening, in particular as a perforation material web row, in particular from several alternating perforations and material webs, or as a longitudinal groove, which is generated in particular by mechanical force from the outside is.

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

5. Packaging material web (1) according to claim 4, 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 and provided with cold-sealable adhesive Transverse strips (13, 15, 17) is formed.

6. Packaging material web (l) according to claim 4 or 5, wherein the transverse strips (13, 15, 17), in particular in the region of at least one longitudinal edge strip, with an indicator (35), such as a material weakening, in particular a perforation or a notch, or a colored marking to indicate the respective horizontal stripe.

7. Packaging material web (1) according to one of claims 4 to 6, wherein the transverse strips (13, 15, 17), in particular between two indicators (35) each arranged on a longitudinal edge strip (9, 11), at least in sections free of cold-sealable adhesive are.

8. Packaging material web (1) according to one of the preceding claims, the at least one in the web longitudinal direction (L) and / or transversely to the web longitudinal direction (L) oriented material weakening row (37), such as a perforation material web row in particular of several alternating perforations and material webs , or a groove, to form a predetermined tear line.

9. Packaging material web (1) according to claim 8, wherein in each case two transverse material weakening rows (37), which are in particular identically formed and oriented parallel to one another, are arranged immediately adjacent to one transverse strip (13, 15, 17), in particular the packaging material web (1) a conveying direction is defined and the two transverse material weakening rows (37) are arranged up and / or down the conveying direction of the transverse strip.

10. Packaging material web (1) according to one of the preceding claims, wherein an amount of the cold-sealable adhesive is at least 5 g / m ² and in particular at most 15 g / m ² .

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

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

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

14. Packaging bag (200) according to claim 13, which has at least two, in particular three, four, five, six or more, predefined folding folds (207) introduced into the packaging material web (1), which 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.

15. Packaging bag (200) according to claim 13 or 14, wherein the packaging cavity (209) is partially occupied by filling and / or cushioning material (231).

16. Packaging material blank (100) for producing a packaging bag (200) designed in particular according to one of claims 13 to 15, the packaging material blank (100) being cut to length by cutting a packaging material web (1) designed according to one of claims 1 to 12 transversely to the web in the longitudinal direction (L ) and is made transversely to the at least one folding hinge (25).

17. A method for producing a packaging material web (1) designed in particular according to one of claims 1 to 12, in particular from paper or cardboard, in particular corrugated cardboard, in which a web-shaped packaging material is provided, at least one on a longitudinal edge (5, 7) of the bahnför shaped Packaging material adjoining longitudinal edge strips (9, 11) is provided at least in sections with a cold-sealable adhesive and the web-shaped packaging material, in particular in the middle with respect to a width measured transversely to the longitudinal direction (L) of the web, to form at least one folding hinge extending in the longitudinal direction (L) of the web (25) is weakened.

18. A method for producing a packaging bag (200) designed in particular according to one of claims 13 to 15, in which in a packaging material web (1) designed in particular according to one of claims 1 to 12 in particular special from paper or cardboard, in particular corrugated cardboard, at least one folding fold (207) is introduced, the packaging material web (1) is formed into a cover (205) and the cover (205) to form a packaging cavity by cold sealing of edge strips of the packaging material web (1) is closed in such a way that the at least one folding fold (207) points into the packaging cavity (209).

19. A method for producing a packaging material blank for producing a packaging bag (200) designed in particular according to one of claims 13 to 15, in which a packaging material web (1) designed according to one of claims 1 to 12 is provided and transversely to the longitudinal direction of the web (L ) and is cut to length transversely to the at least one folding joint (25).