EP3925790A1 - Zig-zag folded paper sheet stack, particularly for processing as a packaging material - Google Patents

Abstract

In the case of a zigzag-folded paper web stack, in particular a recycled paper web stack, at least one fold of the zigzag-folded paper web stack is formed with a row of perforations and fold webs, with fold webs of the fold coupling two folded web sheets folded on top of one another, with the fold web and the perforation each have a maximum longitudinal extent in the longitudinal direction of the fold, it is provided that at least one section of a fold comprises a row of perforations and fold webs each of at least five alternately arranged fold webs and perforations, with a ratio of an added total longitudinal extent of the fold webs within the fold section to an added total longitudinal extent of the Perforations of the same number within the fold section is greater than or equal to 0.8, preferably greater than or equal to 1.

Description

The invention relates to a zigzag folded paper web stack, in particular for further processing as packaging material, for example by means of a packaging material machine, which mechanically reshapes the unfolded paper web into a packaging material, such as a cushioning material, in particular without adding additional materials to the paper web.

An example of a zigzag-folded paper web stack for producing a packaging material stack and for a packaging material machine suitable for this purpose are shown in FIG EP 1 345 757 B1 known, in particular on Figure 3 from EP 1 345 757 B1 Reference is made, which illustrates the zig-zag-folded stack of paper webs.

In order to increase the stack height and the folding capacity of the paper web, it is known to perforate the folds of the paper web stack, whereby the material web is weakened in order to pre-define the folds of the material web in a precise position, to reduce the fold space and to prevent the later tearing off of the material that has been converted into a packaging material To enable the web of material to be positioned precisely.

It is known to form folds of the zigzag-folded paper web stack with a row of perforations and folding webs. An example of a known perforated fold is attached Figure 0 shown schematically. The row of perforations and folding webs is continuously formed with a constant folding web width and perforation width along its entire length in the longitudinal direction q of the folds, which is parallel to the transverse direction of the paper web. The ratio of the width of the perforation to the width of the folding web is 2: 1 or 3: 1 in favor of a larger perforation width. It is known that the folding web (b) along the fold (a) has a maximum longitudinal extent (x ') in the longitudinal direction of the fold (q) of at most 1 mm. In contrast, the perforation (c), that is to say the through hole or elongated hole, is formed in the paper web with a maximum longitudinal extension (y ') of 2mm to 3mm.

It was found that, especially when using a folded paper web stack made of short-fiber paper material, the paper web tears at the weakened fold when it is unfolded and fed into the packaging machine, which disrupts the automated manufacturing process for packaging material. Above all, when the feed speed of the paper web into the packaging material machine is increased, unfolding forces increase so much that a tear-free unfolding of the paper web stack is no longer guaranteed with sufficient reliability.

The object of the invention is to overcome the disadvantages of the prior art, in particular to provide a zigzag-folded paper web stack, in particular made of recycled paper, in particular based on 100% waste paper, in which on the one hand a position-predefined and space-saving folding is facilitated and, on the other hand, a Unintentional tearing of the paper web is prevented, in particular in the case of machine processing to form a packaging material, wherein in particular a simple, accurately positioned tearing off of the packaging material produced from the paper web stack is facilitated.

This object is achieved by the features of claims 1, 6 or 9. Preferred configurations are given in the subclaims.

According to the invention, a zigzag-folded paper web stack, in particular a paper web stack made of recycled paper, for example based on 70% to 100% waste paper, is provided, which is intended to be further processed into packaging material. The at least one fold of the zigzag-folded paper web stack is formed with a row of perforations and folding webs. The predominant part of the fold, in particular the entire course of the folds, is preferably designed with a row of perforations and foldable webs. In a preferred embodiment of the invention, all of the folds of the zigzag folded paper web stack are provided with the row of perforations and folding webs. Folding webs of a fold of the paper web stack couple two folded web sheets of the paper web stack to one another and serve as a folding hinge in order to realize the aligned overlaying of the folded sheets of the stack in a precisely positioned manner. The more accurately the folding is achieved by the folding webs, the more space-saving the paper web stack according to the invention can be implemented. The folding web and the perforation of the perforation-folding web row each have an individual, maximum longitudinal extent (perforation web-individual maximum width) in the longitudinal direction of the fold (in particular transversely to the longitudinal direction of the paper web). The perforation of the perforation-folding web row should be preferred be an elongated hole shape, the hole edges are preferably rounded in the longitudinal direction of the folds and the longitudinal sides of the elongated hole are parallel to one another. In a special embodiment, the perforation can also have an approximately circular hole edge shape. In a preferred embodiment of the invention, it is conceivable that notches or small tears can be located on the edges of the perforation, which have an influence on the tear resistance of the paper web, in particular on the row of perforations and folding webs. The folding webs are realized in one piece with the folded web sheets coupled to them and are delimited in the longitudinal direction of the folds by the two adjacent perforations, unless the folding web forms the longitudinal edge of the paper web. In this case, only one perforation is adjacent to the edge web. The longitudinal edges of the paper web are preferably realized continuously without perforation and in a straight line and are realized at the height of the fold by the edge folding web. The longitudinal extent of the folding web and / or the longitudinal extent of the perforation can vary or be the same size in the course of the row of perforation-folding web, in particular the longitudinal extent of the folding web can be exactly the same as the longitudinal extent of the perforation. At least one section of the fold comprises a reinforced row of perforations and folding webs made up of at least five or ten alternately arranged folding webs and perforations. A fold section can form an entire fold, or several fold sections can extend along a fold. Each fold of the stack of paper webs can be designed accordingly. According to the invention, a ratio of a total longitudinal extension of totaled maximum individual longitudinal extensions of the fold webs within the fold section to be considered to a total longitudinal extension of totalized maximum individual longitudinal extension of the same number of perforations within the fold section defined above is greater than or equal to 0.8, preferably greater than or equal to 1 or 1.5.

In a preferred embodiment of the invention, the total longitudinal expansion ratio is less than 3 or less than 4 or less than 5.

The total longitudinal expansion ratio is preferably between 1 and 2.5.

In a further development of the invention, the fold section of at least five fold webs is arranged near the lateral end edge of the paper web or is arranged in a central region of the paper web. The reinforced central area of the paper web can then be deformed, in particular embossed, by a tool, such as embossing wheels, of the packaging material machine.

In a further development of the invention, the fold section extends over the entire longitudinal extent of the paper web. Alternatively, at least one further differently designed fold section can adjoin the first fold section, which in particular comprises a total longitudinal expansion ratio of greater than or equal to 0.8, preferably greater than or equal to 1 (1.5), which differs from the first fold section.

In a preferred embodiment of the invention, the longitudinal extent of the fold webs and / or the perforations within the fold section are of the same size. As an alternative or in addition, the longitudinal extent of the folding web can be at least as large as or greater than that of the perforation, in particular at least twice as large.

In an alternative aspect of the invention, a zigzag-folded paper web material stack according to claim 6 is provided, which can in particular also be combined with the inventive details of the above-mentioned aspect of the invention. At least one fold, preferably all folds, of the zigzag-folded paper web stack is (are) formed with a row of perforations and folding webs, with folding webs of the fold coupling two folded web sheets to one another. The folding web has a maximum longitudinal extent in the longitudinal direction of the fold. The folding webs of the row of perforations and folding webs can be of different sizes, with one or more perforations, which are exceptionally larger than the adjacent web, can connect to the folding web in the longitudinal direction of the folds. According to the invention, at least one folding web is larger than 1.5mm, preferably larger than 2mm or 3mm. Particularly in the case of large folding webs of over 2mm, especially at the end edge of the paper web, some perforations (less than 10%) can be larger than some of the other paper webs (smaller than 2mm) in the course of the fold.

In a further development of the invention, the edge folding web ends because of its longitudinal extension of greater than 1.5 mm in the lateral, in particular straight end edge of the paper web in the course of the paper web. Alternatively or additionally, a folding web can be arranged in the middle area of the paper web, which is also larger than 1.5 mm.

In a further development of the invention, at least 1/5 of all folding webs of a fold are larger than 1.5 mm, preferably larger than 2 mm or 3 mm. In particular, at least half of the fold webs of a fold, at least 75%, preferably at least 90% or substantially all of the folding webs of a fold are larger than 1.5 mm, preferably larger than 2 mm or larger than 3 mm.

In a further aspect of the invention according to claim 9, which can also be combined with the above-mentioned aspects of the invention, a zigzag-folded paper web stack is provided, at least one fold of the zig-zag-folded paper web stack being formed with a row of perforations and folding webs. Fold webs of the fold hold two folded web sheets together. The folding webs and the perforation of the fold each have a maximum longitudinal extent in the longitudinal direction of the fold. The folding webs and the perforation preferably have a constant maximum length, but can vary. According to a section of the one stacking fold, a row of perforations and folding webs has in each case at least five or ten alternating folding webs and perforations. The individual longitudinal extent of each folding web within the fold section is at least as large as or greater than or twice as large as the individual longitudinal extent of the perforation within the section.

In a preferred embodiment of the invention, the paper webs and / or perforations each have a constant longitudinal extent along the entire fold.

Fig. 1

eine schematische Ansicht eines Abschnitts eines zick-zack-gefalteten Papierbahnstapels im Bereich einer perforierten Falte mit mehreren Perforation-Faltsteg-Reihen;

Fig. 2

eine weitere bevorzugte Ausführung einer perforierten Falte eines Papierbahnstapels mit mehreren Perforation-Faltsteg-Reihen;

Fig. 3

eine weitere Ausführung einer perforierten Falte eines erfindungsgemäßen Papierbahnstapels mit mehreren Perforation-Faltsteg-Reihen; und

Fig. 4

eine weitere Ausführung einer erfindungsgemäßen perforierten Falte eines Papierbahnstapels mit mehreren Perforation-Faltsteg-Reihen.

Further properties, advantages and features of the invention are explained by the following description of preferred embodiments with reference to the accompanying drawings, in which:

Fig. 1

a schematic view of a section of a zigzag-folded paper web stack in the area of a perforated fold with several rows of perforation-folding webs;

Fig. 2

a further preferred embodiment of a perforated fold of a paper web stack with a plurality of rows of perforation folding webs;

Fig. 3

a further embodiment of a perforated fold of a stack of paper webs according to the invention with several rows of perforation folding webs; and

Fig. 4

a further embodiment of a perforated fold according to the invention of a stack of paper webs with several rows of perforations and folding webs.

In Figure 1 only a portion of the zigzag-folded paper web stack according to the invention is shown generally with the reference number 1, a complete paper web stack in FIG Figure 3 of those quoted above Patent specification EP 1 345 757 B1 is shown. the Figure 3 is fully incorporated into the description as a disclosure. The in Figure 1 The paper web stack section 1 shown has two parallel, opposite longitudinal edges 3, 5 which form the broad surfaces of the cuboid paper web stack. A fold 7 of the zigzag-folded paper web stack extends essentially perpendicular to the longitudinal edges 3, 5. By means of two parallel serpentine lines crossing the fold 7, it is shown in the drawing that the entire width in the longitudinal direction Q of the folds of the paper web is not shown, but rather several rows of perforations and folding webs 11, 21 in different designs along the longitudinal direction of the folds for the sake of a simple illustration q have been reproduced as detail areas of the perforated fold 7. The rows of perforations and folding webs are shown oversized.

In a first configuration of the row of perforations and folding webs 11, three perforations 13 are then provided on the longitudinal edge 3.

The perforation-folding web row 11 according to Figure 1 shows four folding webs 15, which can be of different lengths or the same length. In the in Figure 1 The illustrated embodiment of the row of perforations and folding webs 11 is provided with an edge folding web 15a which _{measures a longitudinal extent x 11} in the longitudinal direction q of the folds which is greater than 1 mm, with the in Figure 1 The illustrated example of the edge folding web 15a is a longitudinal _{dimension x 11} of 2mm or 2.5mm.

The further paper webs 15 adjoining the edge folding web 15a in the longitudinal direction q of the folds can have a constant longitudinal _{extent x 21} of about 1mm or 1.5mm, with an alternating longitudinal extent for the three arranged folding webs 15 also being provided. At the in Figure 1 Perforation-folding web row 11 shown is particularly that the perforation 13 (three shown, whereby five to ten perforations can also be provided for the perforation-folding web row 11 arranged at the edge area of the paper web) has a constant longitudinal extent y. The longitudinal extension y for the perforations 13 is 1 mm or 1.5 mm, whereby according to the invention, at least in sections, care must be taken that when looking at the row of perforations and folding webs, there is a ratio of at least five folding webs 15 / perforations 13 arranged alternately in a row the total longitudinal extension of the summed up individual longitudinal extensions is not less than 0.8, preferably greater than or equal to 1 or 1.5.

i = laufende Faltsteg-/Perforationszahl längs eines Faltenabschnitts, insbesondere längs der gesamten Falte, vorzugsweise aller Falten des Papierbahnstapels.For this purpose, the following equation should apply for a total longitudinal expansion behavior regarding directly adjoining folding webs and perforations of the perforation-folding web row (where n is the same number of folding webs and): $${\displaystyle \sum _{i=1}^n}\frac{x_i}{y_i}\ge 0,\mathrm{8th}\mathit{or}\ge 1\mathit{or}\ge 1,5$$

i = running number of folds / perforations along a fold section, in particular along the entire fold, preferably all folds of the paper web stack.

Especially with the in Figure 1 The embodiment shown, the relatively wide dimensions of the edge folding web 15a can be seen. It was found that when feeding and / or reshaping the stack of paper webs to be unfolded, large tensile forces act particularly at the edge area. A particularly wide folding web 15a significantly reduces the probability that the paper web stack will be damaged at this neuralgic point when it is unfolded and when it is introduced into the packaging machine in the unfolded state. Following the edge folding web 15a, webs 15 of smaller dimensions can be provided so that the longitudinal expansion ratio (but above the minimum limit defined above) decreases, which facilitates the space-saving foldability of the zigzag-folded paper web stack.

At other critical sections of the paper web stack, which have high operating load forces, especially during unfolding and during feeding and processing in a packaging material machine (for example according to FIG EP 1 345 757 ) are exposed, folding webs are to be provided that are larger than 1.5mm, preferably larger than 2mm or 3mm. An example of such a neuralgic section is the middle of the paper web, which is possibly deformed by embossing wheels to form a soft cushioning property for the packaging material. In such an area a row of perforations and folding webs 21 can be provided which, as in FIG Figure 1 shown, lies in the central region of the paper web stack section 1 shown. The illustrated row of perforations and folding webs 21 has at least one, two or three (in particular at least five) folding webs 25, which have a length x ₂₁ of 2.5 mm to 3 mm, the perforations 23 adjacent thereto having a longitudinal _{extent y 21} of approximately 1 mm or 1.5 mm.

The row of perforations and folding webs can each have at least five paper webs / perforations following one another, corresponding to the one in each case Figure 1 to 4 have indicated perforation-folding web row 11 to 81. It should be clear that the longitudinal _{extent x i} of n folding webs can vary, at least as large or up to twice as large as the smallest or preferably largest longitudinal extent y _{i of} the n perforations.

It is clear that the longitudinal extent y _{i of} the perforations can also vary. _{Preferably, however, the longitudinal extension y i of} the perforations should be smaller than the longitudinal extension x _{i of} the folding webs 15 at the neuralgic fold sections (deforming central region, edge region).

In Figure 1 a paper web 25a is provided adjacent to the longitudinal edge 5 and opens into the longitudinal edge 5. The dimension in the fold longitudinal direction q for the fold web 25a is larger, in particular twice as large as the perforation 23 adjacent to it.

In Figure 2 two different rows of perforations and folding webs are identified by the reference numerals 31 and 41. The perforation-folding web row 31 differs from that (11) according to FIG Figure 1 in that a smaller absolute longitudinal dimension x _{31 is} used for the edge folding web 35a. Rather, the longitudinal extension x _{31 of} the folding webs 35 in the longitudinal direction q of the folds within the row of perforations and folding webs 31 is essentially the same, with a width of 1.5 mm or 1 mm being used _{for the maximum longitudinal extension x 31.} Particularly in the case of the row of perforations and folding webs 31, the constant maximum longitudinal extent y _{31 of} the perforations 33 is smaller than that of the folding webs 35 and, in particular, are less than 1 mm, preferably about 0.5 mm thick. In the case of the row of perforation and folding webs 31, the edge folding web 35a is just as large as the subsequent folding webs 35, but the edge folding web 31a is significantly larger than the subsequent perforation 33.

In the perforation-folding web row 41 folded on the right section of the paper web stack section 1, significantly larger perforations 44 are made in the paper web, which can have a maximum length y ₄₁ of over 2mm, preferably 3 to 4mm. It should be clear that the intermediate folding webs 43 (43a) are of the same size or larger than the perforations 44 may be. In the case of the row of perforations and folding webs 41, it can even be the case that some of the folding webs 43 can be slightly smaller than the perforations 45. In particular in the case of paper webs 43 of greater than 1.5 mm and 2 mm, the perforations can be larger than the paper webs 43. However, when relatively large perforations are selected, the edge web 43a should be at least the same size with respect to the adjacent perforation 45.

In the paper web stack section 1 according to Figure 3 Two rows of perforations and folding webs 51, 61 are also shown, in which the row of perforations and folding webs 51 represent four perforations 53, some of which have different longitudinal _{dimensions y 51,} and five folding webs of different longitudinal dimensions x ₅₁ . It can be seen that the longitudinal expansion ratio of the folding webs 55 (55a) to the perforations 53 is greater than 1. Particularly in the design of the row of perforations and folding webs 51, different choices of longitudinal _{dimensions x 51} for the folding webs 55 (55a) are _{always clear, with the longitudinal dimension x 51 being} between 1.5 mm and 4 mm.

Particularly in the design of the perforation-folding web row 51 according to Figure 3 that a folding web 55 distal from the longitudinal edge 3 is larger than the otherwise larger edge folding web 55a. This constellation can be provided in particular if a longitudinal extension of greater than 3 mm is selected for the edge folding web 55a. Folding webs 55 of larger dimensions can then be provided for more stable foldability, which can alternate with smaller folding webs.

In the case of the second row of perforations and folding webs 61 according to FIG Figure 3 a particularly stable tear-resistant paper web is provided in which the edge folding web 65a adjacent to the longitudinal edge 5 is dimensioned significantly larger than 3 mm, preferably over 4 mm. This can then be followed by a smaller perforation 63 with a dimension of approximately 2 mm.

In Figure 4 For the paper web stack section 1, two rows of perforations and folding webs 71, 81 are again provided, the two rows of perforation and folding webs 71, 81 being particularly tear-resistant.

In the perforation-folding web row 71, the folding webs 75 (75a) are of the same size and 1mm or smaller than 1mm, the constant longitudinal extent y _{71 of} the perforations 73 being half smaller than the longitudinal _{extent x 71 of} the folding webs 50 (50a) . The longitudinal extension x _{71 of} the folding webs is approximately 0.8 mm to 1 mm, while the maximum longitudinal extent y _{71 of} the perforations 73 can be 0.5 mm or less.

The total longitudinal expansion ratio between the folding bar and the perforation is well above 1.5 in the perforation-folding bar series.

In the further row of perforations and folding webs 81 according to FIG Figure 4 the folding webs 85 are of the same size in the longitudinal direction q of the folds and are approximately 1.5 mm to 2 mm. The perforations 83 are of the same size and are well below 1 mm. The maximum longitudinal _{extent y 81} can vary in the course of the row 81 of perforations and folding webs.

The in Figure 1 to Figure 4 Perforation folding web rows 11-81 shown are shown for reasons of illustration less than five alternately arranged in a row folding webs and perforations, but for the calculation of the total length of the folding webs of the perforations at least five perforations / folding webs in a row. In the illustrated rows of perforations and folding webs 11-81, the respective sequences of perforations and folding webs are to be continued in order to obtain a minimum number of five folding webs and perforations.

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

List of reference symbols

1

Paper web stacks

3, 5

Longitudinal edge

7th

wrinkle

11, 21, 31, 41, 51, 61, 71, 81, e

Perforation folding bar series

13, 23, 33, 43, 53, 63, 73, 83

perforation

15, 25, 35, 45, 55, 65, 75, 85

Folding web

15a, 25a, 35a, 45a, 55a, 65a, 75a, 85a

Edge folding bar

q

Longitudinal direction of folds

x ', x1, x2, x3, x4, x5, x6, x7, x8

Longitudinal expansion

y ', y1, y2, y3, y4, y5, y6, y7, y8

Longitudinal expansion

a

wrinkle

b

Folding web

c

perforation

e

Perforation folding bar series

Claims (10)

Zigzag folded paper web stack, in particular zigzag folded recycled paper web stack, at least one fold (7) of the zigzag folded paper web stack having a row of perforations (11, 21, 31, 41, 51, 61, 71 , 81) is formed, with folding webs (15a, 15, 25a, 25, 35a, 35, 45a, 45, 55a, 55, 65a, 65, 75a, 75, 85a, 85) of the fold (7) two folded web sheets couple to each other, whereby the folding web (15a, 15, 25a, 25, 35a, 35, 45a, 45, 55a, 55, 65a, 65, 75a, 75, 85a, 85) and the perforation (13, 23, 33, 43 , 53, 63, 73, 83) each have a maximum longitudinal _{extent (x i} ; y _i ) in the longitudinal direction of the folds (q), with at least one section of a fold having a row of perforations and folding webs (11, 21, 31, 41, 51, 61, 71, 81) of at least five alternately arranged folding webs (15a, 15, 25a, 25, 35a, 35, 45a, 45, 55a, 55, 65a, 65, 75a, 75, 85a, 85) and perforations (13 , 23, 33, 43, 53, 63, 73, 83), with a ratio of an add mmated total longitudinal extension of the folding webs (15a, 15, 25a, 25, 35a, 35, 45a, 45, 55a, 55, 65a, 65, 75a, 75, 85a, 85) within the fold section to a totaled total longitudinal extension of the perforations (13, 23 , 33, 43, 53, 63, 73, 83) the same number within the fold section is greater than or equal to 0.8, preferably greater than or equal to 1. Zig-zag-folded paper web stack according to Claim 1, in which the overall longitudinal expansion ratio is less than 3 or 4. Zigzag folded paper web stack according to one of the preceding claims, in which the fold section opens into a lateral, preferably straight end edge (3, 5) of the paper web, preferably in the course of the paper web, or is arranged in a central region of the paper web. Zigzag folded paper web stack according to one of the preceding claims, in which the fold section extends over the entire longitudinal extent of the paper web or a further fold section adjoins a first fold section which has a different overall longitudinal expansion ratio compared to the one fold section of greater than or equal to 0.8, preferably greater than or equal to 1, includes. Zigzag folded paper web stack according to one of the preceding claims, in which the longitudinal extent of the folding webs (15a, 15, 25a, 25, 35a, 35, 45a, 45, 55a, 55, 65a, 65, 75a, 75, 85a, 85 ) and / or the perforations (13, 23, 33, 43, 53, 63, 73, 83) within the fold section are of the same size and / or in which the longitudinal extent of the fold web (15a, 15, 25a, 25, 35a, 35 , 45a, 45, 55a, 55, 65a, 65, 75a, 75, 85a, 85) is at least the same size as or larger than that of the perforations (13, 23, 33, 43, 53, 63, 73, 83), in particular is about at least twice as large. Zigzag folded paper web stack, in particular recycling paper web stack, in particular according to one of the preceding claims, wherein at least one fold (7) of the zigzag folded paper web stack is formed with a row of perforations and folding webs, wherein folding webs (15a, 15, 25a, 25, 35a, 35, 45a, 45, 55a, 55, 65a, 65, 75a, 75, 85a, 85) of the fold (7) couple two folded web sheets together, the fold web having a maximum longitudinal extension in the longitudinal direction of the fold (q) , with a perforation (13, 23, 33, 43, 53, 63, 73, 83), with at least one folding web (15a, 15, 25a, 25, 35a, 35, 45a, 45, 55a, 55, 65a, 65, 75a, 75, 85a, 85 ) is greater than 1.5 mm, preferably greater than 2 mm or 5 mm. Zigzag folded paper web stack according to Claim 6, in which the at least one folding web opens into a lateral end edge (3, 5) of the paper web and / or is arranged in a central region. Zigzag folded paper web stack according to one of Claims 6 or 7, in which at least 1/5 of all folding webs (15a, 15, 25a, 25, 35a, 35, 45a, 45, 55a, 55, 65a, 65, 75a, 75 , 85a, 85) of the fold (7) of the paper web are larger than 1.5 mm, preferably larger than 2 mm or 3 mm, with in particular at least half of the folding webs (15a, 15, 25a, 25, 35a, 35, 45a, 45, 55a, 55, 65a, 65, 75a, 75, 85a, 85) of a fold (7) or essentially all of the fold webs (15a, 15, 25a, 25, 35a, 35, 45a, 45, 55a, 55 , 65a, 65, 75a, 75, 85a, 85) of a fold (7) are larger than 1.5 mm, preferably larger than 2 mm or 3 mm. Zigzag folded paper web stack, in particular recycling paper web stack, in particular according to one of the preceding claims, wherein at least one fold (7) of the zigzag folded paper web stack with a row of perforations (11, 21, 31, 41, 51, 61 , 71, 81), with folding webs (15a, 15, 25a, 25, 35a, 35, 45a, 45, 55a, 55, 65a, 65, 75a, 75, 85a, 85) of a fold (7) two on top of each other Coupling the folded sheets of folded sheets to one another, the folding webs (15a, 15, 25a, 25, 35a, 35, 45a, 45, 55a, 55, 65a, 65, 75a, 75, 85a, 85) and the perforation (13, 23, 33 , 43, 53, 63, 73, 83) of the fold (7) each have a maximum longitudinal _{extent (x i} ; y _i ) in the longitudinal direction of the fold (q), with at least a portion of the fold (7) having a row of perforations and folding webs ( 11, 21, 31, 41, 51, 61, 71, 81) of at least five alternately arranged folding webs (15a, 15, 25a, 25, 35a, 35, 45a, 45, 55a, 55, 65a, 65, 75a, 75, 85a, 85) and perforations (13, 23, 33, 43, 53, 63, 73, 83), the individual longitudinal _{extent (x i} ) of each folding web (15a, 15, 25a, 25, 35a, 35, 45a, 45, 55a, 55, 65a, 65, 75a, 75, 85a, 85) within of the folded portion is at least as large as or greater than or twice as large as the individual longitudinal extent (y _i ) of each perforation (13, 23, 33, 43, 53, 63, 73, 83) within the folded portion. Zigzag folded paper web stack according to one of the preceding claims, in which the folding webs (15a, 15, 25a, 25, 35a, 35, 45a, 45, 55a, 55, 65a, 65, 75a, 75, 85a, 85) and the perforations (13, 23, 33, 43, 53, 63, 73, 83) each have a constant longitudinal extent (x _i ; y _i ) along the fold (7).

Images