JP2020196263A - Cardboard material and cardboard box using the same - Google Patents

Abstract

To secure an upright property.SOLUTION: In a bellows-fold cardboard material 1, rectangular sheets 2 in a continuous cardboard are folded back along respective fold lines F in a second direction MD linearly extending along a first direction CD, and are stacked along a third direction TD. In this cardboard material 1, a dimension in the first direction is 850 [mm] or more and 2500 [mm] or less, a dimension in the second direction is 900 [mm] or more and 2500 [mm] or less, and a dimension in the third direction is 700 [mm] or more and 2000 [mm] or less. An interval DI which is a separate distance in the third direction TD between adjacent fold lines F in the third direction TD is within a predetermined distance multiple range relative to a reference dimension TS which is a thickness dimension of one sheet 2. This distance multiple range is a range in which the multiple of the interval DI relative to the reference dimension TS is 1.0 [time] or more and less than 3.4 [times].SELECTED DRAWING: Figure 3

Description

The present invention relates to a bellows-folded corrugated cardboard material and a corrugated cardboard box using the same.

Corrugated cardboard material with bellows fold (also called "fan fold") is known as a material for box making. The corrugated cardboard material is provided with creases between continuous rectangular sheets, and the sheets are alternately folded back at the folds. In such a bellows-folded cardboard material, continuous sheets are stacked one above the other and folded into a rectangular parallelepiped packaging.

The above cardboard materials are box-making systems (“automatic packaging system”, “three-side variable system”, “three-side automatic packaging”, and “on-demand packaging” that manufacture boxes of the optimum size according to the size of the object to be packaged. It is also used as a packaging material. In this box making system, the following three steps are carried out.
・ Feed process: Process of feeding out the bellows-folded cardboard material ・ Cutting process: Process of cutting out the flat cardboard material fed out in the feed process ・ Folding process: Process of assembling the box from the cardboard material cut out in the cutting process

Special Table 2013-513869

However, when a work machine or other material collides with a bellows-folded corrugated cardboard material that is in a poorly folded state, the uprightness such as the shape and stability of the corrugated cardboard material may deteriorate.
This case was created in view of the above issues, and one of the purposes is to ensure uprightness. Not limited to this purpose, it is also possible to exert actions and effects derived from each configuration shown in the "mode for carrying out the invention" described later, which cannot be obtained by the conventional technique. It can be positioned as another purpose.

The corrugated cardboard material disclosed here is a second corrugated cardboard material orthogonal to the first direction on a plane along the fold at each of the folds in which a rectangular sheet extends linearly along the first direction in continuous cardboard. A bellows-folded corrugated cardboard material that is folded back in a direction and the sheets are stacked along a third direction orthogonal to both the first direction and the second direction.
The corrugated cardboard material has a predetermined configuration as a configuration for folding the sheet.
The predetermined configuration includes at least one of the configurations A to E shown below.

The configuration A includes a porosity of 10 [%] or less, which is the ratio of voids existing between the stacked sheets.
The configuration A'includes a porosity of less than 12.0 [%], which is the proportion of voids present between the stacked sheets.

The configuration B includes that the variation in the position of the fold when viewed from the first direction is within a predetermined position range. The position range is a range in which the dimension at which the fold is separated in the second direction is less than 50 [mm] with respect to the reference position preset as the standard position of the fold.

The configuration B'includes that the variation in the position of the fold when viewed from the first direction is within a predetermined position range.
The position range is a range in which the dimension at which the fold is separated in the second direction from the reference position preset as the standard position of the fold is 50 [mm] or less.

In the configurations C and C', the polymerization dimension of the thickness dimension in the pair of the sheets continuous through the crease at the portion folded back from the fold along the second direction by a predetermined dimension is one. It includes being within a predetermined thickness magnification range with respect to the reference dimension which is the thickness dimension of the sheet. The thickness magnification range is a range in which the magnification of the polymerization dimension with respect to the reference dimension is 1.0 [times] or more and less than 3.0 [times].

In the configuration D, the distance between the folds adjacent to each other in the third direction is within a predetermined distance magnification range with respect to the reference dimension which is the thickness dimension of one sheet. Is included. The distance magnification range is a range in which the magnification of the interval with respect to the reference dimension is 1.0 [times] or more and less than 3.0 [times].

In the configuration D', the dimension in the first direction is 850 [mm] or more and 2500 [mm] or less, and the dimension in the second direction is 900 [mm] or more and 2500 [mm] or less. There is an interval in which the dimension in the third direction is 700 [mm] or more and 2000 [mm] or less, and the folds adjacent to each other in the third direction are separated from each other in the third direction. It includes being within a predetermined distance magnification range with respect to a reference dimension which is a thickness dimension of one sheet. The distance magnification range is a range in which the magnification of the interval with respect to the reference dimension is 1.0 [times] or more and less than 3.4 [times].

In the configurations E and E', in a pair of the sheets continuous through the fold, one first sheet has a first edge extending in a direction intersecting the fold and the other second sheet. The angle formed by the second edge extending in the direction intersecting the fold is less than a predetermined intersection angle. The crossing angle is less than 0.30 [°].
In addition, the cardboard box disclosed here uses the above-mentioned cardboard material. That is, it is assembled from the above cardboard material.

According to this case, uprightness can be ensured.

It is a perspective view which shows the corrugated cardboard material of a bellows fold. It is a schematic diagram explaining the structure A. It is a schematic diagram explaining the configurations B to D. It is a schematic diagram explaining the configuration E. It is a schematic diagram explaining the range of motion between a ruled line and a crease. It is a schematic diagram explaining the range of motion between a ruled line and a crease. It is explanatory drawing explaining a cardboard box and a crease. It is explanatory drawing explaining the development pattern and the crease of a cardboard box. It is explanatory drawing explaining the corrugated cardboard material applied to a box making system.

Hereinafter, a cardboard material and a cardboard box as embodiments will be described.
The corrugated cardboard material of the present embodiment is a bellows-folded box-making material in which a rectangular sheet is folded in continuous corrugated cardboard. As this corrugated cardboard material, double-sided corrugated cardboard having liners on both sides with respect to the core is used.
The above-mentioned double-sided cardboard includes single-flute cardboard composed of three base papers (materials) corresponding to one core and two liners, as well as so-called "double-sided cardboard" and "double-sided cardboard". Also included are multi-flute cardboard composed of three or more cores (including one or more middle liners) and five or more base papers corresponding to each of the two liners. In this embodiment, a corrugated cardboard material made of double-sided corrugated cardboard of a single flute is mainly exemplified.

When the cardboard material is made into a box, it becomes a cardboard box. Specifically, the corrugated cardboard material used as the box-making material of the box-making system has a feed process in which the sheets are sequentially fed, a cutting process in which the delivered sheets are cut out in a box development pattern, and folding into a box shape. It is made into a cardboard box through various processes such as a folding process in which it is erected. The box-making system for assembling the cardboard box is not particularly limited, but for example, "Carton Wrap 1000 manufactured by CMC" and "CVP-500 manufactured by Neopost", which are fully automatic systems (fully automatic machines) of the automatic packaging system. , "TXP-600 made by OS Machinery", "EM7 made by Pack Size" of semi-automatic system (semi-automatic machine) that performs from feed process to cutting process, "Compack made by Panotec", "made by HOMAG" "PAQTEC C-200" and "PAQTEC C-250 manufactured by HOMAG" can be used.

In the present embodiment, it is assumed that the corrugated cardboard material is placed on a horizontal plane by giving an example in which the following directions I and II correspond as shown in Table 1 below.
-Direction I: Direction in the corrugated cardboard placed on the horizontal plane-Direction II: Direction in the semi-finished product in the middle of manufacturing the cardboard material

The vertical direction (first direction, indicated by "CD" in the figure) and the horizontal direction (second direction, indicated by "MD" in the figure) are horizontal directions and along the sheet (crease). The direction in which the plane extends. These vertical and horizontal directions are orthogonal to each other. The height direction (third direction, indicated by "TD" in the figure) is a direction along the vertical direction and is orthogonal to both the vertical direction and the horizontal direction. This height direction corresponds to the direction in which the sheets are overlapped.

The MD (Machine Direction) direction is also referred to as a "flow direction", and is a direction in which the corrugated cardboard material manufacturing process progresses from upstream to downstream. The CD (Cross Direction) direction is a direction orthogonal to the MD direction in a plane along the MD direction. The TD (Transverse Direction) direction is a direction orthogonal to both the MD direction and the CD direction.
In addition, unless otherwise specified, the expression "numerical value X to numerical value Y" in this embodiment means a range of numerical value X or more and numerical value Y or less.

[I. One Embodiment]
In one embodiment below, the configuration of the corrugated cardboard material will be described in items [1] and [2]. Item [1] describes a structure in which the corrugated cardboard material is folded (hereinafter referred to as “folded structure”). Item [2] describes the parameters related to the folding of the corrugated cardboard material.
Then, the actions and effects of the configurations of items [1] and [2] will be described in item [3].

[1. Folding structure]
As shown in FIG. 1, the corrugated cardboard material 1 is a box-making material having a rectangular parallelepiped shape.
In the corrugated cardboard material 1, the continuous rectangular sheet 2 (partially marked in FIG. 1) is folded back at the fold F (only partly coded in FIG. 1), and the folded sheet 2 is folded. They are stacked in the height direction.
In the corrugated cardboard material 1 folded in this way, a plurality of folds F extend linearly along the vertical direction on a pair of side surfaces along both the vertical direction and the height direction.

Here, the folding structure of the corrugated cardboard material 1 will be described by focusing on three consecutive sheets 2 (indicated by a two-dot chain line in FIG. 1).
1st sheet 21: Sheet 2 continuous on one side of the 2nd sheet 22
Second sheet 22: Sheet 2 continuous with both the first sheet 21 and the third sheet 23
-Third sheet 23: Sheet 2 continuous with the other side of the second sheet 22

The first fold F1 is provided between the first sheet 21 and the second sheet 22, and the sheets 21 and 22 are continuous via the first fold F1. A second fold F2 is provided between the second sheet 22 and the third sheet 23, and the sheets 22 and 23 are continuous via the second fold F2.
The first fold F1 is a fold F in which the second sheet 22 is folded back toward one side in the lateral direction (to the right in FIG. 1) with respect to the first sheet 21, and the other side in the corrugated cardboard material 1 (right side in FIG. 1). It is arranged on the left side in FIG. The second fold F2 is a fold F in which the third sheet 23 is folded back toward the other side in the lateral direction (left in FIG. 1) with respect to the second sheet 22, and the second fold F2 is one in the lateral direction (one in the corrugated cardboard material 1). It is arranged on the right side in FIG.

In the first sheet 21, the corrugated cardboard wave 10 is formed in the _first end edge E ₁ (in FIG. 1, only the front edge is marked) extending in the lateral direction (the direction intersecting the crease F). Be exposed. Similarly, on the second sheet 22, the cardboard is provided on the second edge E ₂ extending in the lateral direction (the direction intersecting the crease F) (in FIG. 1, only the front edge is marked). The wave 10 is exposed.
In the sheet pair 20 composed of the first sheet 21 and the second sheet 22, the first end edge E ₁ and the second end edge E ₂ are arranged adjacent to each other in the height direction.

According to the corrugated cardboard material 1 having the above-mentioned folding structure, even a material that is difficult to be wound in a roll shape can be folded in a rectangular parallelepiped shape. That is, the corrugated cardboard sheet 2 having a higher strength than the material that can be wound in a roll shape can be made into a compact packaging. The corrugated cardboard material 1 in which the sheet 2 whose strength is ensured is folded in this way is suitable for use as a packaging material for a box-making system for manufacturing a box in which strength is required.

In addition, the fold F is provided along the corrugated cardboard wave 10. In other words, the corrugated cardboard material 1 having a wave 10 perpendicular to the MD direction is manufactured.
The corrugated cardboard material 1 is preferably wrapped (wrapped) with a packaging film in order to prevent stains and collapse of the load.

[2. Parameters]
Hereinafter, the parameters of the corrugated cardboard material 1 will be described.
First, basic parameters such as the size of the corrugated cardboard material 1 and the thickness dimension of the sheet 2 will be described. After that, the parameters related to the folding of the corrugated cardboard material 1 will be described in detail.

[2-1. Basic parameters]
<Size>
The size of the corrugated cardboard material 1 is determined from the following dimensions L1 to L3.
-Vertical dimension L1: Vertical dimension (first dimension)
-Horizontal dimension L2: Horizontal dimension (second dimension)
-Height dimension L3: Dimension in the height direction (third dimension)
The smaller the dimensions L1 to L3, the greater the restrictions on the size and shape of the box to be manufactured, and the larger the size, the lower the workability such as transportation and delivery. From these viewpoints, the dimensions L1 to L3 may be within the range shown in Table 2 below in the configurations A to E described later (excluding the configurations A', B', C', D', and E'). preferable.

<Thickness dimension>
The sheet 2 in the cardboard material 1 has an A flute with a thickness of 5 [mm], a B flute with a thickness of 3 [mm], a C flute with a thickness of 4 [mm], and a thickness of 1.5 [mm]. ] E flute, double flute that combines any two types of flute (thickness dimension is 6 to 10 [mm]), and various standard thickness dimensions can be adopted, and non-standardized thickness dimensions are adopted. You may.

The larger the thickness dimension, the better the cushioning property, but the stronger the sheet 2, the more easily it is crushed. In consideration of these tendencies, the thickness dimension used for the sheet 2 of the corrugated cardboard material 1 is preferably 1 [mm] to 10 [mm], and is 1.5 [mm] to 8 [mm]. Is more preferable.

<Others>
In addition, if the number of folds F in the corrugated cardboard material 1 is N [sheets], the number of sheets 2 is N + 1 [sheets]. In this case, the N + 1 [stage] sheets 2 are overlapped on the cardboard material 1.
Furthermore, the height dimension per step corresponding to one sheet 2 can be calculated by dividing the height dimension L3 of the corrugated cardboard material 1 by the number of steps N + 1 of the sheet 2. The height dimension per step calculated in this way corresponds to the thickness dimension of the sheet 2 in the corrugated cardboard material 1.

For example, as the number of stages of the corrugated cardboard material 1, for example, various stages of 10 to 1000 [stages] can be mentioned. For the corrugated cardboard material to which the parameters related to folding, which will be described in detail later, are measured, it is preferable to measure the parameters at each of all the stages for the measurement target having less than a predetermined number of stages (for example, 100 [stages]). On the other hand, for the measurement target having a predetermined number of stages (for example, 100 [stages]) or more, the parameters are measured partially (for example, a portion divided into parts or a set area).

From the relationship between the height dimension L3 and the number of steps as described above, it is possible to calculate a preferable range set for the number N of folds F in the corrugated cardboard material 1. Specifically, the range of the value obtained by subtracting "1" from the value obtained by dividing the height dimension L3 in the preferable range by the thickness dimension of the sheet 2 is approximated as a preferable range set in the number N of the folds F. be able to.

An arbitrary basis weight can be set for the sheet 2 used for the corrugated cardboard material 1. The range of the basis weight adopted for the sheet 2 includes a range of 50 to 1500 [g / m ² ], preferably a range of 100 to 1000 [g / m ² ], and more preferably 200 to 200. The range of 800 [g / m ² ] is mentioned, and more preferably the range of 200 to 600 [g / m ² ] is mentioned.
The weight of the corrugated cardboard material 1 is calculated by multiplying the above basis weight by the vertical dimension L1 and the horizontal dimension L2 and the number of steps N + 1 of the sheet 2.

[2-2. Folding parameters]
The corrugated cardboard material 1 of the present embodiment has a predetermined configuration regarding folding of the sheet 2 based on at least one of the viewpoints I to X listed below.
・ Viewpoint I: Ensuring the appearance (appearance) of the boxed box ・ Viewpoint II: Ensuring the strength of the boxed box ・ Viewpoint III: Ensuring the feedability of the corrugated cardboard material 1 to be boxed -Viewpoint IV: Suppressing damage to the packaging film-Viewpoint V: Improving the safety of the cardboard material 1 for the handler-Viewpoint VI: Ensuring the stability of the placed cardboard material 1・ Viewpoint VII: Ensuring the accuracy of the box made ・ Viewpoint VIII: Ensuring the stability of the corrugated cardboard material 1 during transportation ・ Viewpoint IX: Cracking of the ruled lines and breakage of the end face of the corrugated cardboard material 1 during transportation・ Viewpoint X: Ensuring box-making stability when applied to a box-making system

The above viewpoints I to X are viewpoints for solving the following problems I to X in which the common ordinal numbers I to X are described.
・ Problem I: The appearance of the boxed box deteriorates ・ Problem II: The strength of the boxed box is insufficient ・ Problem III: The feedability of the corrugated cardboard material to be boxed deteriorates ・ Problem IV : The packaging film is damaged ・ Problem V: There is room for improvement in the safety of the cardboard material 1 for the handler ・ Problem VI: The placed cardboard material 1 is unstable ・ Problem VII: The accuracy of the box made is reduced. ・ Problem VIII: The corrugated cardboard material 1 during transportation is unstable. ・ Problem IX: The corrugated cardboard material 1 during transportation causes line cracking and end face breakage. ・ Problem X. : Decreased box-making stability when applied to a box-making system

It can be said that the problems I and II are caused by the fact that when the cardboard material 1 is assembled into a box, a portion different from the ruled line for box making is folded. The viewpoints I and II can be said to be based on ensuring box-making property in order to solve such problems I and II.
Problem III can be said to be a problem that the sheet 2 is not satisfactorily fed out from the cardboard material 1 and the paper feed stability is lowered. It can be said that the viewpoint III is based on ensuring the paper feed stability in order to solve the problem III.
Problem IV can be said to be a problem that the film that wraps the cardboard material 1 may be torn. The viewpoint IV can be said to be a viewpoint based on suppressing the tearing of the film in order to solve such a problem IV.

Problem VI can also be said to be a problem that when the corrugated cardboard material 1 is transported for use in a box-making system, the transportability such as the formability and stability of the corrugated cardboard material 1 may be deteriorated. The viewpoint VI can be said to be a viewpoint based on ensuring transportability in order to solve such a problem VI.
The problem VI can be said to be a problem that when a work machine or other material collides with the stationary cardboard material 1, the uprightness such as the morphology and stability of the cardboard material 1 may be deteriorated. The viewpoint VI can be said to be a viewpoint based on ensuring uprightness in order to solve such a problem VI.

Problem VIII can be said to be a problem that when the cardboard material 1 is transported, there is a risk of damage (tear) at the folds, crushing of the folds, and deterioration of the stability of the cardboard material 1. The viewpoint VIII can be said to be a viewpoint based on ensuring transportability in order to solve such a problem VIII.
Further, in the problem IX, when the corrugated cardboard material 1 is transported, there is a possibility that the creases may be damaged (creases in the ruled lines), or the sheets may be broken (folded at the end face) in addition to the folds at the folds. It can be said that this is an issue. The viewpoint IX can be said to be a viewpoint based on ensuring transportability by suppressing "breaking of ruled lines" and suppressing "breaking of the end face" in order to solve such a problem IX. Here, the "end surface" is a surface of the corrugated cardboard material 1 along both the vertical direction and the height direction, and is a surface on which the fold F extends.

Problem X is that when the cardboard material 1 is applied to the box-making system, the processing stability in various processes such as the feed process, the cutting process, and the fold process in the box-making system becomes insufficient, or the box-making system It can be said that there is a problem that the quality of the boxes manufactured in the above may be deteriorated. The viewpoint X can be said to be a viewpoint based on ensuring box-making stability in order to solve such a problem X.

The predetermined configuration specified from the above viewpoints I to X includes at least one of the configurations A to E shown below.
-Structure A, A': The ratio of the crease F forming a predetermined defective state is equal to or less than the predetermined ratio-Structure B: The variation in the position of the crease F when viewed from the vertical direction is within the predetermined position range. -Structure C, C': The polymerization dimension is within a predetermined thickness magnification range with respect to the reference dimension.-Structure B': The following configurations 1 to 4 are provided.
Configuration 1: Configuration B above
Configuration 2: Configuration C above
Configuration 3: The reference dimension is within the specified dimension range
Configuration 4: The basis weight of the corrugated cardboard base paper is within the predetermined basis weight range. ・ Configuration D: The interval between the folds F is within the predetermined distance magnification range with respect to the reference dimension. ・ Configuration D': Configuration D' Includes the following configurations 5 and 6.
Configuration 5: The distance between the folds F is within a predetermined distance magnification range with respect to the reference dimension. Configuration 6: The size of the corrugated cardboard material 1 is within a predetermined dimension range. ・ Configuration E, E': Sheet pair 20 The edges E ₁ and E ₂ of the cardboard are in a predetermined orientation.

<Structure A, A'>
The configurations A and A'are as described above, "the ratio of the folds F forming a predetermined defective state is equal to or less than the predetermined ratio".
The "crease F forming a defective state" of the configurations A and A'includes a state in which a gap exists between the sheets 2 around the fold F.

For example, as shown in the lower part of FIG. 2, when a fold FA is generated in addition to the set fold F, it should be folded in two at the fold F, but other than the fold F. It will be in a state where it is folded at a point or a state where the folded part is doubled (so to speak, "tri-fold"). In such a state, if the sheet 2 is in a good state, it extends in a plane as shown on the upper side of FIG. 2, whereas the sheet 2 is folded and bent by FA, and the first sheet of the sheet to 20 A gap S (so-called "eye") may form between the 21 and the second sheet 22.
The "vacancy S" referred to here is a void existing 15 [mm] inside from the folded end portion of the corrugated cardboard material 1, and the void included in the "crease F forming a defective state" is the area thereof. Refers to those whose (side area) is 25 [mm ² ] or more.
In addition, the "crease F forming a defective state" of the configurations A and A'may include a state in which the fold F is damaged.

Examples of the state in which the fold F is damaged include the following states 1A and 1B.
・ State 1A: There is a thread or crush in the fold F ・ State 1B: The state where the fold F is torn

The inventors of the present application have found that if the proportion of the fold F in the above-mentioned defective state among all the folds F is lower than the predetermined proportion, the above-mentioned problems I and II tend to be suppressed. It was. Conversely, it was found that if the proportion of the crease F in the defective state among all the folds F is higher than the predetermined proportion, problems I and II tend to occur.
That is, the corrugated cardboard material 1 is provided with the configurations A and A'based on the above-mentioned viewpoints I and II. In addition, according to the configurations A and A', the constitutions A and A'are provided in the corrugated cardboard material 1 based on the viewpoint III from the finding that the above-mentioned problem III also tends to be suppressed.

Further, regarding the configuration A', the inventors of the present application tend to suppress the above-mentioned problem III if the ratio of the fold F in the above-mentioned defective state among all the folds F is equal to or more than the second predetermined ratio. I got the finding that there is. Conversely, it was found that if the ratio is lower than the second predetermined ratio, problem III tends to occur.

The "predetermined ratio" of the configurations A and A'is a percentage of the number n of the folds F, which is a defective state with respect to the total number N of the folds F, and may be referred to as the defective rate or the defect rate of the folds F.
From the above viewpoints I, II or III, “less than or equal to a predetermined ratio” of the configuration A is at least 10 [%] or less, preferably 8.0 [%] or less, and 2.0 [%]. ] The following is more preferable.
“Being less than or equal to a predetermined ratio” of the configuration A ′ is less than 12.0 [%] and preferably 10.0 [%] or less, preferably 2.0 [%] or less, from the above-mentioned viewpoints I, II and III. It is more preferably [%] or less.
The "second predetermined ratio or more" of the configuration A'is 0.0 [%] or more, preferably 0.2 [%] or more, and preferably 0.5 [%] or more. More preferred.

<Structure B>
The configuration B is “the variation in the position of the fold F when viewed from the vertical direction is within a predetermined position range” as described above.
The "position of the crease F" of the configuration B is a position in the lateral direction.
Further, as shown in FIG. 3, the “variation in the position of the crease F” is the variation in the BL of the dimension (hereinafter referred to as “separation dimension”) in which the crease F is laterally separated from the reference position BS. .. The "variation in the position of the crease F" can be said to be the deviation of the end face of the corrugated cardboard material 1.

This deviation of the end face occurs because the actual crease F of the corrugated cardboard material 1 is not formed by the ruled line Cr, that is, the sheets 2 are not folded back at the position of the ruled line Cr. That is, although the crease F formed at the same position as the ruled line Cr is an ideal configuration, the actual corrugated cardboard material 1 may be displaced laterally from the ruled line Cr to form the actual crease F. Yes, the end face may be displaced according to the displaced crease F.

As shown in FIG. 5, the ruled line Cr is a folding device for manufacturing the corrugated cardboard material 1, and is along the width direction (vertical direction) of the corrugated cardboard web 1W on the upstream side of the step of alternately folding the band-shaped corrugated cardboard web 1W. It is recessed. Ideally, the sheets 2 are folded back at the position of the ruled line Cr, and the crease F is formed at the position of the ruled line Cr. However, the actual crease F may be formed so as to be laterally displaced with respect to the ruled line Cr, and the end face may be displaced (see FIG. 5). Factors that cause the end face to be displaced include the properties used for the corrugated cardboard material 1 and the manufacturing conditions of the folding device such as the transport speed. In FIG. 5, the region between the actual crease F and the ruled line Cr is referred to as “range of motion” 30.

The reference position BS is preset as a standard position of the fold F. For example, the reference position BS is set on a vertical line passing through the fold F which is the most recessed in the vertical direction when observed from the horizontal direction.
The inventors of the present application have found that the above-mentioned problem IV tends to be suppressed if the variation of the separation dimension BL is within a predetermined position range. Conversely, it has been found that if the variation of the separation dimension BL is outside the predetermined position range, the problem IV tends to occur.

That is, the corrugated cardboard material 1 is provided with the configuration B based on the above-mentioned viewpoint IV.
In addition, according to the configuration B, the cardboard material 1 is provided with the configuration B based on the viewpoint III, V, VI based on the finding that the above-mentioned problems III, V, and VI also tend to be suppressed.
A part of the corrugated cardboard material 1 is excluded from the measurement target of the separation dimension BL. This is because the end face is likely to be displaced during artificial work such as transportation work or installation work of corrugated cardboard material, which is likely to cause disturbance (factor) that lowers the accuracy of the measurement result. For example, in the case of corrugated cardboard material of 330 [stage], 30 [stage] from the top is excluded from the measurement target of the separation dimension BL, and in the case of corrugated cardboard material of 60 [stage], the upper and lower 5 [stage] are the separation dimension BL. Excluded from measurement.
The “within a predetermined position range” of the configuration B is less than 50 [mm], preferably less than 22 [mm], and more preferably less than 15 [mm].

<Structure C, C'>
The configurations C and C'are "the polymerization dimension is within a predetermined thickness magnification range with respect to the reference dimension" as described above.
As shown in FIG. 3, the "polymerization dimension CL" of the configurations C and C'is in the sheet pair 20 at the portion folded back by a predetermined dimension LP (here, 5 [mm]) along the lateral direction from the crease F. It is a thickness dimension. On the other hand, the "reference dimension TS" of the configuration C is the thickness dimension of the sheet 2 per sheet.

The inventors of the present application have found that if the polymerization dimension CL is within a predetermined thickness magnification range with respect to the reference dimension TS, the above-mentioned problem VI tends to be suppressed. Conversely, it has been found that if the polymerization dimension CL is outside the predetermined thickness magnification range with respect to the reference dimension TS, the problem VI tends to occur.
That is, the corrugated cardboard material 1 is provided with the configuration C based on the above-mentioned viewpoint VI.
In addition, according to the configuration C, based on the finding that the above-mentioned problems II, III, IV, and V also tend to be suppressed, the configuration C is provided in the corrugated cardboard material 1 based on the viewpoints II, III, IV, and V. There is.

Regarding the configuration C', the inventors of the present application have found that the above-mentioned problem IX tends to be suppressed if the polymerization dimension CL is within a predetermined second thickness magnification range with respect to the reference dimension TS. Conversely, it was found that the problem IX tends to occur if it is outside the range of the second thickness magnification.

The “within a predetermined thickness magnification range” of the configuration C is 1.0 [times] or more and less than 3.0 [times], and 1.25 [times] or more and less than 2.5 [times]. It is preferably 1.5 [times] or more and less than 2.0 [times].
Speaking of specific dimensions, when the reference dimension TS is 4 [mm], the polymerization dimension CL is 4 [mm] or more and less than 12 [mm], and 5 [mm] or more. It is preferably less than 10 [mm], more preferably 6 [mm] or more and less than 8 [mm].

The "within a predetermined thickness magnification range" of the configuration C'is 1.0 [times] or more and less than 3.0 [times], and 1.5 [times] or more and 2.7 [times]. It is preferably less than, more preferably 2.0 [times] or more and less than 2.5 [times].
Speaking of specific dimensions, when the reference dimension TS is 4 [mm], the polymerization dimension CL is 4 [mm] or more and less than 12 [mm], and 5 [mm] or more. It is preferably less than 10 [mm], and more preferably 8 [mm] or more and less than 10 [mm].

<Structure B'>
As described above, the configuration B'has "configuration 1 in which the variation of the fold F is within a predetermined position range" and "configuration 2 in which the polymerization dimension CL is within a predetermined thickness magnification range with respect to the reference dimension TS". , "Structure 3 in which the reference dimension TS is within the predetermined dimension range", and "Structure 4 in which the basis weight of the base paper is within the predetermined basis weight range".
The "variation in the position of the crease F", the "polymerization dimension CL", and the "reference dimension TS" in the configuration B'are the same as the "variation in the position of the crease F" and the "polymerization dimension" described in the configurations B and C, respectively. It is the same as each of "CL" and "reference dimension TS". The "base paper basis weight" of the configuration B'is the basis weight of the base paper forming each of the core and the liner constituting the corrugated cardboard material 1.

The inventors of the present application have found that the variation in the position of the fold F is within a predetermined position range (Structure 1), the polymerization dimension is within a predetermined thickness magnification range with respect to the reference dimension (Structure 2), and the reference dimension. It was found that if the TS is within a predetermined dimensional range (Structure 3) and the basis weight of the base paper is within a predetermined basis weight range (Structure 4), the above-mentioned problem IV tends to be suppressed. In other words, it has been found that the problem IV tends to be suppressed by combining the above configurations 1, 2, 3 and 4. Conversely, if at least one of the variation in the position of the fold F, the predetermined thickness magnification, the reference dimension TS, and the basis weight of the base paper is out of the predetermined range, the problem IV tends to occur. I found it.
That is, the corrugated cardboard material 1 is provided with the configuration B'based on the above-mentioned viewpoint IV.
In addition, according to the configuration B', the configuration B'is prepared for the corrugated cardboard material 1 based on the viewpoint II, III, V, VI from the finding that the above-mentioned problems II, III, V, and VI also tend to be suppressed. Has been done.

The “within a predetermined position range” of the configuration B ′ is 50 [mm] or less, preferably less than 22 [mm], and more preferably less than 15 [mm].
The "within a predetermined thickness magnification range" of the configuration B'is preferably 1.0 [times] or more, 1.0 [times] or more, and 3.5 times or less, preferably 1.25 [times]. ] Or more and 3.0 [times] or less, and more preferably 1.5 [times] or more and 2.5 [times] or less.
The “within a predetermined dimensional range” of the configuration B ′ is preferably 1 [mm] or more, 1 [mm] or more and 10 [mm] or less, and 1.5 [mm] or more. It is more preferably 9 [mm] or less, and further preferably 2 [mm] or more and 8 [mm] or less.
“Within a predetermined basis weight range” of the configuration B ′ means that the basis weight of the base paper forming the core or liner constituting the corrugated cardboard material 1 is less than 280 [g / m ² ], preferably 220 [g / m ^2]. ], More preferably less than 200 [g / m ² ].

<Structure D>
The configuration D is “the distance between the folds F is within a predetermined distance magnification range with respect to the reference dimension” as described above.
As shown in FIG. 3, the “distance DI” of the configuration D is the distance between the folds F adjacent to each other in the height direction and separated from each other in the height direction. The "reference dimension TS" of the configuration D is the same as the "reference dimension TS" described above in the configuration C.

The inventors of the present application have found that if the interval DI is within a predetermined distance magnification range with respect to the reference dimension TS, the above-mentioned problem VI tends to be suppressed. Conversely, it has been found that if the interval DI is outside the predetermined distance magnification range with respect to the reference dimension TS, the problem VI tends to occur.
That is, the corrugated cardboard material 1 is provided with the configuration D based on the above-mentioned viewpoint VI. In addition, from the finding that the above-mentioned problems III and V tend to be suppressed, the corrugated cardboard material 1 is provided with the configuration D based on the viewpoints III and V.

The “within a predetermined distance magnification range” of the configuration D is 1.0 [times] or more and less than 3.0 [times], 1.25 [times] or more and less than 2.5 [times]. It is preferably 1.8 [times] or more and less than 2.0 [times].
Speaking of specific dimensions, when the reference dimension TS is 4 [mm], the interval DI is 4 [mm] or more, less than 12 [mm], and 5 [mm] or more. It is preferably less than 10 [mm], and more preferably 7.2 [mm] or more and less than 8 [mm].

<Structure D'>
As described above, the configuration D'has a configuration 5 in which the distance between the folds F is within a predetermined distance magnification range with respect to the reference dimension and a configuration 6 in which the size of the corrugated cardboard material 1 is within a predetermined dimension range. And.
The “spacing DI” and “reference dimension TS” of the configuration D ′ are the same as the “spacing DI” and the “reference dimension TS” described above in the configuration D.
The size of the corrugated cardboard material 1 of the configuration D'is determined by the above-mentioned vertical dimension L1, horizontal dimension L2 and height dimension L3.

The inventors of the present application tend to suppress the above-mentioned problems VI and X when the size of the corrugated cardboard material 1 is within a predetermined range and the interval DI is within a predetermined distance magnification range with respect to the reference dimension TS. I got the finding that it is in. Conversely, if the size of the corrugated cardboard material 1 is outside the predetermined dimension range, or if the interval DI is outside the predetermined distance magnification range with respect to the reference dimension TS, problems VI and X tend to occur. I found that there is.
That is, the corrugated cardboard material 1 is provided with the configuration D'based on the above-mentioned viewpoints VI and X. In addition, from the finding that the above-mentioned problems III and V tend to be suppressed, the corrugated cardboard material 1 is provided with the configuration D based on the viewpoints III and V.

In configuration 6 of configuration D', "within a predetermined dimension range" means that the vertical dimension is 850 [mm] or more and 2500 [mm] or less, and the horizontal dimension is 900 [mm] or more and 2500 [mm]. The height dimension is preferably 700 [mm] or more and 2000 [mm] or less, the vertical dimension is 1000 [mm] or more and 2200 [mm] or less, and the horizontal dimension is 1100. More preferably, it is [mm] or more and 2000 [mm] or less, and the height dimension is 1300 [mm] or more and 2000 [mm] or less.

In configuration 5 of configuration D', "within a predetermined distance magnification range" is 1.0 [times] or more and less than 3.4 [times], and 1.25 [times] or more and 3.2. It is preferably less than [times], more preferably 1.8 [times] or more and less than 3.0 [times].
Speaking of specific dimensions, when the reference dimension TS is 4 [mm], the interval DI is 4 [mm] or more and less than 13.6 [mm], and 5 [mm] or more. It is preferably less than 12.8 [mm], and more preferably 7.2 [mm] or more and less than 12 [mm].

<Structure E, E'>
The configurations E and E'are "the edges E ₁ and E _{2 of the} sheet to 20 are in a predetermined orientation" as described above.
As shown in FIG. 4, the "predetermined orientation" of the configurations E and E'is the angle formed by the _first end edge E ₁ and the second end edge E ₂ of the sheet pair 20 (hereinafter referred to as "intersection angle"). θ is less than a predetermined intersection angle.
The crossing angle θ is generated when the actual crease F is formed so as to be displaced from the ruled line Cr for folding back the corrugated cardboard material 1. That is, although the crease F formed parallel to the ruled line Cr is an ideal configuration, the actual corrugated cardboard material 1 may have a crease F slightly inclined with respect to the ruled line Cr. An intersection angle θ between the edge edges E ₁ and E ₂ can occur depending on the inclined crease F.

As shown in FIG. 6, the ruled line Cr is a folding device for manufacturing the corrugated cardboard material 1, and is along the width direction (vertical direction) of the corrugated cardboard web 1W on the upstream side of the step of alternately folding the band-shaped corrugated cardboard web 1W. It is recessed. Ideally, the sheets 2 are folded back at the position of the ruled line Cr, and the crease F is formed at the position of the ruled line Cr. However, the actual crease F may be inclined with respect to the ruled line Cr in the width direction (inclined in the lateral direction) to generate an intersection angle (see FIG. 6). Factors that cause the crossing angle include the properties used for the corrugated cardboard material 1 and the manufacturing conditions of the folding device such as the transport speed.
Note that FIG. 6 shows, for example, a case where one end in the width direction is laterally separated from the ruled line Cr at the actual crease F and the other end is in contact with the ruled line Cr. However, at the actual crease F, the other end portion in the width direction may be laterally separated from the ruled line Cr. In FIG. 6, the region between the actual crease F and the ruled line Cr is referred to as “range of motion” 30.

Regarding the configurations E and E', the inventors of the present application have found that if the crossing angle θ is less than a predetermined crossing angle, the above-mentioned problem III tends to be suppressed. Conversely, it was found that if the crossing angle θ is equal to or greater than a predetermined crossing angle, problem III tends to occur.
That is, the corrugated cardboard material 1 is provided with the configurations E and E'based on the above-mentioned viewpoint III. In addition, from the finding that the above-mentioned problems II, V, VI, and VII also tend to be suppressed, the corrugated cardboard material 1 is provided with the configuration E based on the viewpoints II, V, VI, and VII.
The "predetermined crossing angle" referred to here is 0.30 [°], preferably 0.25 [°], more preferably 0.15 [°], and 0.05 [°]. ] Is even more preferable.

Further, regarding the configuration E', the inventors of the present application can suppress the above-mentioned problem VIII if the intersection angle θ is in a predetermined intersection angle range in which the intersection angle θ is equal to or more than a predetermined lower limit intersection angle and equal to or less than a predetermined upper limit intersection angle. We obtained the finding that there is a tendency. Conversely, it has been found that if the crossing angle θ is not within a predetermined crossing angle range, problem VIII tends to occur.
The lower limit crossing angle of the "predetermined crossing angle range" referred to here is 0.00 [°] or more, and preferably 0.04 [°] or more. Further, the upper limit crossing angle of the "predetermined crossing angle range" is preferably 0.40 [°] or less, and more preferably 0.35 [°] or less.

<Others>
By the way, in the assumed ideal corrugated cardboard material 1, there are no folds F in a defective state, and all the positions of the folds F coincide with the reference position BS. However, almost all of the actual corrugated cardboard material 1 has creases F in a defective state, and defective portions such as the positions of the folds F vary.

Therefore, an ideal configuration that cannot exist in the actual corrugated cardboard material 1 may be excluded from the above configurations A to E. For example, a lower limit value such as 0.1 [%] may be set for a predetermined ratio of the configuration A, or a lower limit value such as 1 [mm] or 2 [mm] may be set for the separation dimension BD of the configuration B. ..
In addition, at locations where the fold F is crushed or the intersection angle θ is equal to or greater than a predetermined intersection angle, it may be impossible to measure the polymerization dimension CL, the interval DI, and the like. When such an unmeasurable part exists, parameters such as the polymerization dimension CL and the interval DI are measured at the part excluding the unmeasurable part (that is, all the measurable parts).

[3. Action and effect]
By providing the corrugated cardboard material 1 of the present embodiment at least one of the above-described configurations A to E, it is possible to ensure box-making property when used as a box-making material.
According to the configurations A and A', since the defective fold F is equal to or less than a predetermined ratio, the fold F is added to the appearance of the box assembled from the corrugated cardboard material 1 cut out by the cut line straddling the fold F. Even if the fold F is included, it is possible to suppress the occurrence of a fold line corresponding to the fold FA in addition to the fold F. Therefore, the appearance of the box can be ensured (solving the above-mentioned problem I), and the strength of the box can be ensured (solving the above-mentioned problem II).

According to the configurations A and A', it is possible to suppress a defect when the corrugated cardboard material 1 is fed out. Specifically, it is possible to suppress clogging of the corrugated cardboard material that is delivered in the feed process in the box making system. In this way, it is possible to secure the feedability of the corrugated cardboard material to be manufactured (solve the above-mentioned problem III).

Even with the configuration B, since the variation in the position of the crease F is within a predetermined position range, it is possible to suppress a defect when the corrugated cardboard material 1 is unwound, and to secure the feedability of the corrugated cardboard material to be manufactured ( The above-mentioned problem III can be solved).
Further, according to the configuration B, since the protrusion of the crease F in the corrugated cardboard material 1 is suppressed, it is possible to prevent the film packaging the corrugated cardboard material 1 from being damaged by the crease F (solving the above-mentioned problem IV). it can.

By suppressing the breakage of the film, the exposure of the fold F is also suppressed. This makes it possible to improve the safety of the cardboard material 1 for the handler (solve the above-mentioned problem V). As a result, it is possible to suppress the collapse of the corrugated cardboard material 1, and it is also possible to suppress stains such as wetting (risk of water ingress) and dirt. It is also possible to secure the stability of the corrugated cardboard material 1 (solve the above-mentioned problem VI) by suppressing the load collapse.
In addition, according to the configuration B, the variation in the lateral position of the fold F is suppressed, so that the fold F is prevented from being crushed by colliding with another object during the transport work or the installation work of the corrugated cardboard material 1. be able to. In this way, it is possible to suppress the appearance defect of the corrugated cardboard material 1.

According to the configuration C, since the lower limit value is set in the thickness magnification range of the polymerization dimension CL with respect to the reference dimension TS, the fold is formed in the box assembled from the corrugated cardboard material 1 cut out by the cut line straddling the crease F. It is possible to secure the strength of the portion corresponding to F (solve the above-mentioned problem II). If the thickness magnification is smaller than the lower limit of the predetermined thickness magnification range, the stress on the crease F is excessively concentrated, and the strength of the portion corresponding to the crease F becomes insufficient in the manufactured box. It is presumed that there is a risk.
Further, according to the configuration C, since the upper limit value is set in the predetermined thickness magnification range, the gap S is less likely to be generated around the crease F, so that a defect when the corrugated cardboard material 1 is fed out can be suppressed. Can be done. Therefore, it is possible to secure the feedability of the corrugated cardboard material to be manufactured (solve the above-mentioned problem III).

According to this configuration C, since the lower limit value of the predetermined thickness magnification range is set, the sharpness of the crease F in the corrugated cardboard material 1 is suppressed, so that the film packaging the corrugated cardboard material 1 is damaged by the crease F. Can be suppressed (solving the above-mentioned problem IV).
By suppressing the breakage of the film, the exposure of the fold F is also suppressed. This makes it possible to improve the safety of the cardboard material 1 for the handler (solve the above-mentioned problem V). As a result, it is possible to suppress the collapse of the corrugated cardboard material 1, and it is also possible to suppress stains such as wetting (risk of water ingress) and dirt. It is also possible to secure the stability of the corrugated cardboard material 1 (solve the above-mentioned problem VI) by suppressing the load collapse.
Further, regarding the configuration C', if the thickness magnification of the polymerization dimension CL with respect to the reference dimension TS is a predetermined thickness magnification, it is possible to suppress both the cracking of the corrugated cardboard and the bending of the end face (solving the above-mentioned problem IX). be able to.

According to the configuration B', the variation in the position of the fold F is within the predetermined position range, the polymerization dimension CL is within the predetermined thickness magnification range with respect to the reference dimension TS, and the reference dimension TS is within the predetermined dimension range. When the basis weight of the base paper is within the predetermined basis weight range, the sharpness of the crease F in the corrugated cardboard material 1 is suppressed, so that the film wrapping the cardboard material 1 is damaged by the crease F. It can be suppressed (solving the above-mentioned problem IV).
Since the variation in the position of the fold F is within the predetermined position range, it is possible to suppress a problem when the corrugated cardboard material 1 is unwound, and to secure the feedability of the corrugated cardboard material to be manufactured (Problem III described above). It can also be solved).
Further, since the lower limit value is set in the thickness magnification range, the strength of the portion corresponding to the crease F is secured in the box assembled from the corrugated cardboard material 1 cut out by the cut line straddling the crease F (described above). It is also possible to solve Problem II).

By suppressing the breakage of the film, the exposure of the fold F is also suppressed. This makes it possible to improve the safety of the cardboard material 1 for the handler (solve the above-mentioned problem V). As a result, it is possible to suppress the collapse of the corrugated cardboard material 1, and it is also possible to suppress stains such as wetting (risk of water ingress) and dirt. It is also possible to secure the stability of the corrugated cardboard material 1 (solve the above-mentioned problem VI) by suppressing the load collapse.
In addition, according to the configuration B', the variation in the lateral position of the fold F is suppressed, so that the fold F is crushed by colliding with another object during the transporting operation of the corrugated cardboard material 1 or during the installation work. Can be suppressed. In this way, it is possible to suppress the appearance defect of the corrugated cardboard material 1.

According to the configurations D and D', since the interval DI of the fold F is within a predetermined distance magnification range with respect to the reference dimension TS, the gap S is less likely to occur around the fold F, and thus the corrugated cardboard material. It is possible to suppress a defect when 1 is paid out. Therefore, it is possible to secure the feedability of the corrugated cardboard material to be manufactured (solve the above-mentioned problem III).
According to this configuration D, since the variation DI in the interval DI between the folds F is suppressed, the polymerization state of the sheet 2 is stable (the cargo is stable). Therefore, the stability of the placed corrugated cardboard material 1 can be ensured (solving the above-mentioned problem VI). Therefore, even if the corrugated cardboard material 1 is not wrapped with a film, it is possible to suppress the load collapse of the corrugated cardboard material 1 and improve the safety for the operator of the corrugated cardboard material 1 (solving the above-mentioned problem V). be able to.
Further, regarding the configuration D', if the size of the cardboard material 1 is within a predetermined range and the interval DI is within a predetermined distance magnification range with respect to the reference dimension TS, the cardboard material 1 is applied to the box making system. It is also possible to secure box-making stability (solve the above-mentioned problem X).

According to the configurations E and E', the intersection angle θ formed by the _first end edge E ₁ and the second end edge E ₂ of the sheet pair 20 is less than a predetermined intersection angle, so that the end edges E ₁ and E ₂ The variation in the position of is suppressed. Therefore, it is possible to suppress a defect when the corrugated cardboard material 1 is unwound, and to secure the feedability of the corrugated cardboard material to be manufactured (solve the above-mentioned problem III).
Further, by stabilizing the polymerization state of the sheet 2 (stable cargo), the stability of the placed corrugated cardboard material 1 can be ensured (solving the above-mentioned problem VI). As a result, even if the corrugated cardboard material 1 is not wrapped with a film, it is possible to prevent the corrugated cardboard material 1 from collapsing. Therefore, it is possible to improve the safety of the cardboard material 1 for the handler (solve the above-mentioned problem V).

According to the configurations E and E', it is possible to suppress a defect of being folded at a place other than a desired ruled line in the folding process of the box making system, and it is also possible to improve the box making accuracy. As a result, the strength of the box can be ensured (solving the above-mentioned problem II).
Further, regarding the configuration E', if the intersection angle θ formed by the _first end edge E ₁ and the second end edge E ₂ of the sheet pair 20 is within a predetermined intersection angle range, the transportability of the corrugated cardboard material is ensured (the above-mentioned problem). VIII can be solved).
In addition, according to the cardboard box using the cardboard material 1, the same action and effect as the cardboard material can be obtained.

[II. Example]
Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples. However, the present invention is not limited to the following examples.
In this item [II], items common to the examples and comparative examples of configurations A to E (excluding the examples and comparative examples of configurations A', B', C', D', and E') are listed. 1] will be described, and examples and comparative examples corresponding to the respective configurations A to E will be described in item [2]. Further, an example in which three of the configurations A to E are combined will be described in item [3].

[1. Common subject matter]
--Measurement target--
In the examples and comparative examples of configurations A to E (excluding the examples and comparative examples of configurations A', B', C', D', E'), the corrugated cardboard material whose parameters are measured (hereinafter referred to as A configuration common to (referred to as "measurement cardboard material") will be described.
The measurement cardboard material is a double-sided cardboard sheet for A flute.

This measured corrugated cardboard material consists of the following base paper and has the following size.
-Core base paper: 160 [g / m ² ] (OND EM160: manufactured by Oji Materia Co., Ltd.)
・ Liner base paper: 170 [g / m ² ] (OFK EM170: manufactured by Oji Materia Co., Ltd.)
・ Size: Vertical dimension 1300 [mm],
Horizontal dimension 1150 [mm],
Height dimension 1800 [mm]

In addition, the corrugated cardboard material to be measured was manufactured using a corrugator having a stepped roll of the specifications shown below.
・ Step height: 4.5 [mm]
・ Number of steps: 34 steps [mountain / 30 cm]
The "step height" is the height of the step in the sheet of the corrugated cardboard material to be measured, and is a dimension corresponding to the amplitude of the wave. The "number of steps" is the number of peaks (steps) per 30 [cm] on the sheet, and corresponds to a value obtained by dividing 30 [cm] by the wavelength of the wave surface.

The measurement corrugated cardboard material or a part thereof, which is the measurement target of the parameters, was subjected to a treatment of adjusting the humidity for 24 [hours] in an RH environment with a temperature of 23 [° C.] and a humidity of 50 [%]. This process is referred to as "pre-processing" in the following description.
It is assumed that the temperature condition allows a variation of ± 5 [° C.] and the humidity condition allows a variation of ± 10 [%]. The same variations as above shall be allowed for each of the pretreatment conditions and the temperature and humidity conditions at the time of evaluation described below.
In addition, a commonly used one-tank type starch paste was used as the adhesive for corrugated cardboard to bond the liner base paper and the core base paper.

--Evaluation--
Each of the examples and comparative examples, which will be described in detail later in the next item [2], was evaluated on a four-point scale of “◎”, “○”, “△”, and “×”. The highest evaluation "◎" and the next highest evaluation "○" were evaluated as good. On the other hand, "x" with the lowest evaluation and "Δ" with the next lowest evaluation were regarded as poor evaluations.

In the examples and comparative examples of configurations A to E (including the examples and comparative examples of configurations A', B', C', D', and E'), the basis weight of the base paper and the thickness dimension of the measured corrugated cardboard material, The step ratio and the number of steps were measured by the following methods.
--Measuring method of basis weight--
The basis weight of the liner base paper and the core base paper used for the corrugated cardboard material can be measured according to, for example, a method conforming to JIS P 8111: 1998 standard.
Specifically, when the liner base paper and the core base paper are separated from the measurement cardboard material for measurement, the liner base paper and the core base paper are carefully immersed in ion-exchanged water overnight so that the paper does not tear. The base paper can be separated by hand and dried using a dryer under a temperature condition of 105 [° C.] to obtain a paper sample, which can be measured by applying a measuring method conforming to JIS P 8111: 1998 standard.

--Measurement method of thickness dimension--
The "thickness dimension" is a parameter corresponding to the thickness of each sheet in the measured corrugated cardboard material. This thickness dimension was measured by the following procedures Sa to Sd.
-Procedure Sa: Half the number of steps (that is, the middle step) of the total number of steps of the measured corrugated cardboard material
Collect 5 upper and lower sheets as a reference. Specifically, the measurement cardboard material
When the total number of stages M is odd, the number of stages is half of the total number of stages of the measured corrugated cardboard material.
Five steps above and below based on the step rounded off by M / 2 (that is, the middle step)
Collect the sheet. When the total number of stages M of the corrugated cardboard material is even, the measurement da
Up and down based on half the number of stages [(M / 2) + 1] of the total number of stages of the ball material
Five steps of sheets were collected. When collecting the test piece, the step is crushed.
I was careful not to.
-Procedure Sb: 5 [cm] x 5 [cm] size from 10 sheets collected in procedure Sa
Cut out a test piece into a square.
-Procedure Sc: Measure the thickness of the test piece cut out in procedure Sb according to the following standards, measuring equipment, and measurement.
Measure under constant conditions.
> Compliant standard: Corrugated cardboard industry standard T0004: 2000
> Measuring equipment: Thickness gauge (Mitutoyo Ratchet, model number K470101K)
> Measurement conditions: Plunger diameter 16 [mm], load 3923 [mN]
-Procedure Sd: A disturbance that reduces the accuracy of the measurement result from the thickness measured in the procedure Sc (required)
Exclude the numerical values that can be (cause) (so to speak, the numerical values that deviate greatly), and calculate the average value.
The thickness was taken.
In the "exclusion of numerical values that can cause disturbance" in the procedure Sd, when each numerical value measured in the procedure Sc is used as the population, the numerical value whose standard deviation of the population deviates from ± 3σ is excluded.

--Measurement method of step rate--
The "step ratio" is a parameter corresponding to the magnification of the length dimension in the MD direction with respect to the liner of the core. This step-by-step rate was measured by the following procedures Ta to Tg.
-Procedure Ta: Similar to procedure Sa, half the total number of steps of the measured corrugated cardboard material.
Collect the upper and lower five-tiered sheets based on.
-Procedure Tb: The direction in which the core mountain is continuous from the ten sheets collected in Procedure Ta (horizontal)
20 [cm] in the direction (MD direction) and orthogonal to the core peak (vertical)
Cut out to a size of 10 [cm] in the direction (direction, CD direction).
-Procedure Tc: The test piece cut out in procedure Tb is immersed in tap water for 24 hours.
-Procedure Td: After the procedure Tc is immersed, the liners on the front and back are peeled off and the core is taken out.
-Procedure Te: The length of the core taken out in step Td stretched out by hand.
With a ruler.
-Procedure Tf: The "extended length of the core" measured in procedure Te and cut out in procedure Tb.
The length of the core of the test piece in the continuous direction ("Original cardboard sheet"
The step ratio is called "length", here 20 [cm]), and the following formula b is used.
Is calculated.
Step ratio = length when the core is fully extended / length of the original cardboard sheet ... Equation b
-Procedure Tg: Similar to the above procedure Sd, the measurement result is obtained from the step-by-step rate calculated in the procedure Tf.
Exclude the numerical values that can cause disturbances (factors) that reduce the accuracy of
The one taken was used as the step-by-step rate.

--How to measure the number of steps--
The "number of steps" was measured by visually counting the number of ridges included in the length of 30 [cm] with respect to the flow direction (MD direction) of the measured corrugated cardboard material.
--Definition of flute--
From the thickness dimensions, stepping ratio, and number of steps measured as described above, the flute of the measured corrugated cardboard material was defined as follows.
・ A flute: Step ratio 1.6 ± 0.2 [times], number of steps 34 ± 4 [mounts / 30 cm],
Step height 4.3-5.0 [mm]
・ B flute: Step ratio 1.4 ± 0.2 [times], number of steps 50 ± 4 [mount / 30 cm],
Step height 4.3-3.0 [mm]
・ C flute: Step ratio 1.5 ± 0.2 [times], number of steps 40 ± 4 [mount / 30 cm],
Step height 3.3-4.0 [mm]
・ E flute: Step ratio 1.2 ± 0.2 [times], number of steps 80 or more [mount / 30 cm],
Step height 1.0 to 1.2 [mm]

[2. Configurations A to E]
<Structure A>
--Measurement target--
In Examples A1 to A3 and Comparative Examples A4 and A5 relating to the configuration A, the amount of voids in the stationary measurement cardboard material was compared. Specifically, 101 [stages] in the middle stage of the corrugated cardboard material to be measured was set as the measurement target. That is, the middle section where the sheets are adjacent to each other at 100 [locations] in the height direction was measured.

The "gap" is a space existing in a range of 15 [mm] along the horizontal direction (MD direction) from the folded end of the sheet in the measured corrugated cardboard material, and is an area viewed from the vertical direction (hereinafter, "gap"). The side area) is 25 [mm ² ] or more.

The voids were determined by the procedures Aa to Ae shown below.
-Procedure Aa: In the measured corrugated cardboard material, the folded end of the sheet and its surroundings
Observe the presence or absence of space in.
-Procedure Ab: A 10 [mm] square standard piece of paper is attached to the measurement cardboard material near the gap.
Take a picture so that both the void and the standard piece of paper fit in.
-Procedure Ac: Enlarge and print the photograph taken in Procedure Ab, and use scissors to insert standard paper pieces and gaps.
cut out.
-Procedure Ad: Pretreat the cut sample and weigh the pretreated sample.
To.
-Procedure Ae: From the weight ratio, assuming that the side area (flat area) of the standard test piece is 100 [mm ² ].
Calculate the side area of the void.

For example, a right-angled triangular space having two sides of 11 [mm] and 10 [mm] excluding the hypotenuse when viewed from the vertical direction has a side area of 55 [mm ² ] and is 15 from the folded end of the sheet. If it exists in the range of [mm], it is judged to be a void.
The points to be observed in the above procedure Aa are the following points Ac.
-Location Ac: The corners of all (4 [locations]) in the measured corrugated cardboard material, that is, the locations observed in the location Ac are 400 [locations] (4 [locations] x 100 [locations]) in total.

Then, in Examples A1 to A3 and Comparative Examples A4 and A5, the corrugated cardboard materials for measuring the porosity shown in Table 3 below were used.
The "porosity" corresponds to the "predetermined ratio" of one embodiment, and is the ratio at which voids exist between the stacked sheets. Specifically, the porosity is a percentage of "the number of places where voids exist" with respect to "the number of all measurement points", and was calculated by the following formula AI.
Porosity = number of places where voids exist / number of all measurement points ... Equation AI

--Evaluation--
The box-making properties of the measured corrugated cardboard materials of Examples A1 to A3 and Comparative Examples A4 and A5 were evaluated.
The "box-making property" here refers to the accuracy of a box in which cardboard pieces (hereinafter referred to as "evaluation cardboard pieces") cut out by a cut line straddling the creases of the measured cardboard material are assembled by hand (handmade). It is an evaluation standard corresponding to the quality of. As a manual assembly method, the cut corrugated cardboard piece was folded at a predetermined ruled line, attached with a hot melt adhesive, and boxed.
The method of assembling the evaluation cardboard pieces by the box-making system is the same regardless of whether the evaluation cardboard pieces are assembled by hand or by the box-making system. Therefore, it is presumed that the box-making property of the evaluation cardboard piece assembled by hand has a correlation with the box-making property of the evaluation cardboard piece assembled by the box-making system.

The "evaluation cardboard piece" is a test piece in which the measurement cardboard material is punched into the following shape and size with a sample cutter (CF2-1218 manufactured by Mimaki Engineering Co., Ltd.).
-Shape: Pattern in which the A-type cardboard box is developed-Size: Width dimension of the side plate of the A-type cardboard box 356 [mm],
Width dimension of the end plate of the A type cardboard box 159 [mm],
Height dimension of A type cardboard box 256 [mm]
・ Number of sheets: 100 [sheets]

The above evaluation cardboard pieces were evaluated according to the following criteria.
-⊚: All (100 [sheets]) evaluation cardboard pieces have good box-making properties.
-○: Evaluation of 100 [sheets] One [sheet] of the corrugated cardboard pieces has poor box-making property.
-Δ: Evaluation of 100 [sheets] Of the corrugated cardboard pieces, 2-3 [sheets] have poor box-making properties.
-X: Evaluation of 100 [sheets] Of the cardboard pieces, 4 [sheets] or more have poor box-making properties.

The term "good box-making property" as used herein means that the distance dimension between the following folded portions A and B in the evaluated corrugated cardboard piece is less than the predetermined distance dimension.
-Folded part A: A part where a ruled line for box making (an element different from the fold) is provided.-Folded part B: A part that is actually broken when assembled in a box (during box making).

The "predetermined distance dimension" is 2.0 [mm] for the dimension in the direction perpendicular to the fold of the evaluation cardboard piece (MD direction), and the dimension in the direction parallel to the crease (CD direction). Is 5 [mm].
On the other hand, "poor box-making property" means that the distance dimension between the folded portions A and B in the evaluated corrugated cardboard piece is equal to or larger than the predetermined distance dimension.
FIG. 7 shows an example of a type A cardboard box 100 provided with a fold 110 (folded portion A, shown by a dotted line in FIG. 7) generated by bellows folding. FIG. 8 shows the unfolding pattern 100'of the cardboard box 100 of FIG. 7, and the unfolding pattern 100'shows the crease 110 (folded portion A, in FIG. 8) generated by bellows folding separately from the ruled line for box making. (Indicated by the dotted line) is provided.

In Examples A1 to A3 having a porosity of 10 [%] or less, good box-making property was obtained. Among them, in Example A1 having a porosity of 2 [%] or less, excellent box-making property was obtained.
On the other hand, in Comparative Examples A4 and A5 in which the porosity was larger than 10 [%], poor box-making property was obtained. Among them, in Comparative Example A5 in which the porosity was larger than 14 [%], particularly poor box-making property was obtained.
From the evaluation results of Examples A1 to A3 and Comparative Examples A4 and A5, the evaluation corrugated cardboard pieces cut out from the measurement corrugated cardboard material having a void ratio of 10 [%] or less can suppress the distance dimension between the folded portions A and B. It can be seen that box-making property is ensured.

<Structure A'>
--Measurement target--
In the examples and comparative examples relating to the configuration A', the flutes and dimensions, the basis weight and grade of the base paper were different with respect to Examples A10 to A25 and Comparative Examples A26 to A28, and the porosity in the statically measured corrugated cardboard material was determined. It was measured.
In each of the measurement cardboard materials of Examples A10 to A12 and Comparative Examples A26 and A27, the flute, the basis weight, and the dimensions are the same as those of the measurement cardboard materials of Examples A1, A2, A3 and Comparative Examples A4 and A5 described above. Is. In each of the measurement cardboard materials of Examples A13 to A25 and Comparative Example A28, at least one of the flute, the basis weight, and the dimensions is the same as the measurement cardboard materials of Examples A1, A2, A3 and Comparative Examples A4, A5 described above. Is different.

Specifically, for each of the measurement cardboard materials of Examples A10 to A25 and Comparative Examples A26 to A28, any one of the four types of flutes shown below was adopted.
-A flute (single flute): Examples A10 to A15, A19 to A21, A2
4, A25, Comparative Examples A26, A27
-B flute (single flute): Example A16
-E flute (single flute): Examples A17, A22, Comparative Example A28
-AB flute (double flute): Examples A18, A23

The measurement cardboard material of each flute used in each of Examples A10 to A25 and Comparative Examples A26 to A28 was produced by using a corrugated board having a stepped roll of the specifications shown below.
> A flute ・ Step height: 4.5 [mm]
・ Number of steps: 34 [mountain / 30 cm]
> B flute ・ Step height: 2.5 [mm]
・ Number of steps: 50 [mountain / 30 cm]
> E flute ・ Step height: 1.1 [mm]
・ Number of steps: 85 [mountain / 30 cm]
＞ AB Flute ――A Flute――
・ Step height: 4.5 [mm]
・ Number of steps: 34 [mountain / 30 cm]
--B flute--
・ Step height: 2.5 [mm]
・ Number of steps: 50 [mountain / 30 cm]

Of the above four types of flutes, the single flute forming the A flute, the B flute, and the E flute is composed of three base papers (materials) corresponding to one core and two liners, respectively. The double flute that forms the AB flute is composed of five base papers (materials) corresponding to each of the three cores and the two liners.
In Examples A10 to A25 and Comparative Examples A26 to A28, any one of the following nine types of base paper was used for each of the base papers forming the core or liner constituting the respective measurement cardboard materials.

・ No. 1: Product name "OFC EM160", manufactured by Oji Materia Co., Ltd.,
Basis weight 160 [g / m ² ]
・ No. 2: Product name "OFLC EM120", manufactured by Oji Materia Co., Ltd.,
Basis weight 120 [g / m ² ]
・ No. 3: Product name "PC EM210", manufactured by Oji Materia Co., Ltd.,
Basis weight 210 [g / m ² ]
・ No. 4: Product name "OFK EM160", manufactured by Oji Materia Co., Ltd.,
Basis weight 160 [g / m ² ]
・ No. 5: Product name "OFLC EM100", manufactured by Oji Materia Co., Ltd.,
Basis weight 100 [g / m ² ]
・ No. 6: Product name "OFK EM280", manufactured by Oji Materia Co., Ltd.,
Basis weight 280 [g / m ² ]
・ No. 7: Product name "OND EM160", manufactured by Oji Materia Co., Ltd.,
Basis weight 160 [g / m ² ]
・ No. 8: Product name "ONB EM120", manufactured by Oji Materia Co., Ltd.,
Basis weight 120 [g / m ² ]
・ No. 9: Product name "OFLC EM 90", manufactured by Oji Materia Co., Ltd.,
Basis weight 90 [g / m ² ]

Specifically, in each of the measurement cardboard materials of Examples A10 to A25 and Comparative Examples A26 to A28, the base paper forming the liner and the base paper forming the core in the following combinations were used in the following combinations.
(Liner base paper) No. 1, (Core base paper) No. 7: Examples A10 to A12, A16 to
A22, Comparative Examples A26 to A28
(Liner base paper) No. 2, (Core base paper) No. 8: Examples A13, A23
(Liner base paper) No. 3, (Core base paper) No. 7: Example A14
(Liner base paper) No. 4, (Core base paper) No. 7: Example A15
(Liner base paper) No. 5, (Core base paper) No. 9: Example A24
(Liner base paper) No. 6, (Core base paper) No. 7: Example A25

No. 4 and No. For each of the liner base papers with No. 6, a base paper having a grade of K liner (craft liner) is used. No. 1-No. 3, No. For each of the 5 liner base papers, a base paper having a grade of C liner (jute liner) is used. The grades are divided according to the amount of pulp compounded, and the K liner is generally harder than the C liner.

For each of the measurement cardboard materials of Examples A10 to A25 and Comparative Examples A26 to A28, any one of the four sizes 1 to 4 shown below was adopted.
・ Size 1: Vertical dimension 1300 [mm],
Horizontal dimension 1150 [mm],
Height dimension 1800 [mm]
・ Size 2: Vertical dimension 600 [mm],
Horizontal dimension 1150 [mm],
Height dimension 1800 [mm]
・ Size 3: Vertical dimension 2000 [mm],
Horizontal dimension 1150 [mm],
Height dimension 1800 [mm]
・ Size 4: Vertical dimension 400 [mm],
Horizontal dimension 1150 [mm],
Height dimension 1800 [mm]
Specifically, size 1 was adopted as the measurement cardboard material of Examples A10 to A18, A21, A23 to A25, and Comparative Examples A26 and A27. Size 2 was adopted as the measurement cardboard material of Examples A19 and A22. Size 3 was adopted as the measurement cardboard material of Example A20. Size 4 was adopted as the measurement cardboard material of Comparative Example A28.

Then, in Examples A10 to A25 and Comparative Examples A26 to A28, the corrugated cardboard materials for measuring the porosity shown in Tables 4 to 6 below were used. The voids were determined by the same procedure as the above-mentioned procedures Aa to Ae.
In each of Examples A10 to A25 and Comparative Examples A26 to A28, the porosity is determined by appropriately selecting the type of the ruled line jig and the depth of the ruled line, and appropriately selecting the type, grade, flute, etc. of the base paper. It was adjusted. In each of the measurement cardboard materials of Examples A10 to A25 and Comparative Examples A26 to A28, the processing of adding a ruled line and the processing of folding into a bellows fold were performed manually by an operator.

The ruled line jig is a pushing tool for denting a ruled line forming a crease with the measuring cardboard material.
There are a plurality of "types" of ruled line jigs in which the shape of the portion where the cardboard is pushed is different. The way the cardboard bends along the ruled line differs depending on the shape (type) of the ruled line jig.
The "depth" of the ruled line expresses how much the liner forming the front or back surface of the cardboard is pushed in when the ruled line is recessed in the cardboard with the ruled line jig, as a ratio [%] to the total thickness of the cardboard. The value.

Specifically, the ruled lines of the measured corrugated cardboard materials of Examples A10 to A25 and Comparative Examples A26 to A28 are formed by using a ruled line jig having any one of the following three types, and each ruled line is formed. It was adjusted to the "depth" of any one of the following five ways.
-Shape: R ruled line (Examples A10 to A20, A22 to A25, Comparative Examples A26, A27)
Square ruled line (Example A21)
V ruled line (Comparative example A28)
-Depth: 70 [%] (Examples A10, A13 to A25)
50 [%] (Example A11)
30 [%] (Example A12, Comparative Example A28)
20 [%] (Comparative Example A26)
10 [%] (Comparative Example A27)

--Evaluation--
The box-making properties of the measured corrugated cardboard materials of Examples A10 to A25 and Comparative Examples A26 to A28 were evaluated.
The evaluation of the box-making property corresponds to the quality of the box in which the "evaluation cardboard piece" is assembled by hand, which is the same as the box-making property evaluated in Examples A1 to A3 and Comparative Examples A4 and A5. Evaluation criteria similar to the above The corrugated cardboard pieces were evaluated according to the same criteria as above.

In addition, the feedability (“feedability 1”) in the box-making system was evaluated for the measured corrugated cardboard materials of Examples A10 to A25 and Comparative Examples A26 to A28.
This feedability 1 is an evaluation standard corresponding to the quality of paper feed stability in the box making system.

Feedability 1 is when the measured corrugated cardboard materials of Examples A10 to A25 and Comparative Examples A26 to A28 are applied to the following box-making system to manufacture a box under the following manufacturing conditions (box-making speed). , Measurement Evaluation was made based on whether or not the sheet was smoothly fed out from the corrugated cardboard material and whether or not the box-making system was stopped (also referred to as "machine stop").
Box making system: CMC, product name "CMC Carton Wrap 1000"
Box making speed: 500 [box per hour]
It was visually confirmed whether or not the above sheet was properly extended and whether or not the machine was stopped.

This feedability 1 was evaluated according to the following criteria.
・ ◎: Only 1 [sheet] can be held when feeding out the sheet from the measurement cardboard material.
No folds other than the creases of the bellows folds have occurred.
・ ○: 1 [sheet] sheet and subsequent sheet when feeding out the sheet from the measurement cardboard material
An event occurs in which two [sheets] of the sheet are lifted at the same time, but a snake
No folds other than the belly folds occur, and no machine stop occurs.
・ △: 1 [sheet] sheet and subsequent sheet when feeding out the sheet from the measured corrugated cardboard material
Two [sheets] of the sheet are lifted at the same time, and after the bellows fold fold
The outside breaks, but the machine does not stop.
・ ×: 1 [sheet] sheet and subsequent sheet when feeding out the sheet from the measurement cardboard material
Two [sheets] of the sheet are lifted at the same time, and after the bellows fold fold
An outer fold occurs, and the machine stops due to the fold that occurs.
In the above, "when the sheet is unwound from the measured corrugated cardboard material" means that the rotating body (reference numeral 41 in FIG. 9 described later) provided in the box making system rotates 120 [°] and the measured corrugated cardboard material is conveyed by a predetermined amount. It's time to go.

In Examples A10 to A25 having a porosity of less than 12.0 [%], good box-making property was obtained. Among them, in Examples A10, A15 to A17, A19, and A22 having a porosity of 2.0 [%] or less, excellent box-making property was obtained.
On the other hand, in Comparative Examples A26 to A28 having a porosity of 12.0 [%] or more, poor box-making property was obtained. Among them, in Comparative Example A25 in which the porosity was larger than 14.0 [%], particularly poor box-making property was obtained.

From the evaluation results of Examples A10 to A25 and Comparative Examples A26 to A28, the evaluation corrugated cardboard pieces cut out from the measured corrugated cardboard material having a porosity of less than 12.0 [%] have a reduced distance between the folded portions A and B. It can be seen that at least the box-making property is ensured.

When the porosity is a small value of less than 12.0 [%], only one crease occurs due to bellows folding (see crease F in FIG. 2), which is an unexpected location during box making. There is a tendency that the box-making property is ensured because the possibility of breakage is low.
On the other hand, when the porosity is a large value of 12.0 [%] or more, there are a plurality of folds generated due to bellows folding (see the folding FA in FIG. 2), and unexpected folding during box making. The influence of the eyes on the box-making property becomes large, and the box-making property tends to be insufficient.

When assembling a cardboard box using a single-wafer cardboard material, there are no creases other than the ruled lines for box making (see FIG. 6).
On the other hand, when assembling a cardboard box using a measurement cardboard material (continuous cardboard) that is made by folding a continuous strip of sheet in a bellows, a fold may occur in an unexpected place other than the ruled line for box making. , This break may lead to poor box making. As described above, the larger the porosity, the greater the influence of unexpected creases on the box-making property. Therefore, in this case, adjusting the porosity within a predetermined range to improve the box-making property can be said to be an effect peculiar to continuous corrugated cardboard.

Of Examples A10 to A25, only the basis weight and grade of the base paper used for the liner and the core, or the flute of the measured corrugated cardboard material is different from Example A10. At least the box-making properties of Examples A13 to A18 and A23 to A25 are Since the evaluation of "○" or higher was obtained, it is inferred that the difference in the basis weight and grade of the base paper used for the liner and core, or the flute of the measured corrugated cardboard material does not affect the evaluation of box-making property. ..

Generally, the package size of the measured corrugated cardboard material is 2500 [mm] or less in the vertical direction, 2500 [mm] or less in the horizontal direction, and 2000 [mm] or less in the height direction. is there.
Among Examples A10 to A25, Examples A19, A20, and A22 having different dimensions have a vertical dimension of 500 [mm] or more and 2500 [mm] or less, and a horizontal dimension of 800 [mm]. If it is 2500 [mm] or less and the dimension in the height direction is 1000 [mm] or more and 2000 [mm] or less, the difference in dimension tends not to affect the box-making property. ..

Among Examples A10 to A25, in Examples A10 to A23 having a porosity of 10.0 [%] or less, an evaluation of "○" or more was obtained in both evaluations of box-making property and feedability 1. There is.
Further, in Examples A10 to A15, A18, A21, A22, and A23 having a porosity of 0.5 [%] or more among Examples A10 to A23, an evaluation of “⊚” was obtained in the evaluation of feedability 1. ..
On the other hand, among Examples A10 to A25, in Examples A24 and A25 having a porosity larger than 10.0 [%], although the box-making property was evaluated as "○" or more, the feed property was 1. The evaluation was "△" or less.

In view of Examples A24 and A25, from Examples A10 to A23, if the porosity is 10.0 [%] or less, it can be said that the feedability 1 can be secured in addition to the box-making property.
Further, in view of Examples A16, A17, and A19, when the porosity is 0.5 [%] or more from Examples A10 to A15, A18, A21, A22, and A23, it can be said that the feed property 1 is excellent.

When the porosity is less than 0.5 [%], the box-making property is excellent, but the stacked sheets come into contact with each other too much and there is little air between them, which makes it difficult for the sheets to separate from each other. An event occurs in which [sheets] sheets are lifted at the same time, and the feedability 1 tends to be slightly inferior.
That is, if the porosity is small, the inflow of air from that location is small, the sheets are more likely to stick to each other through the folds, and it is presumed that an event occurs in which two [sheets] are simultaneously lifted when the sheets are fed out. On the contrary, if the porosity is large, the inflow of air from that location is large, and it is presumed that the sheets tend to separate from each other through the folds, and the sheets tend to be unwound one by one when the sheets are unwound. ..

When the porosity is larger than 10.0 [%], the stacked sheets come into contact with each other too little and the sheets tend to bend, so that folds other than the bellows folds occur, and feedability 1 is ensured. It tends to be difficult.
When the porosity is large, the creases in the vicinity thereof are folded at a plurality of places (see the fold FA in FIG. 2), and the strength is lowered. When the strength of the fold is reduced, it is presumed that the crease is likely to vibrate from the crease during transportation, and as a result, folds other than the bellows fold are likely to occur.

When the single-wafered corrugated cardboard material is passed through a machine such as a box-making machine, generally, the upper portions of the plurality of laminated single-wafered cardboard materials are lifted one by one by an adsorption device and passed through the machine. At the time of adsorption by this adsorption device, there is a phenomenon that two [sheets] of the single-wafered cardboard material are lifted at the same time. Therefore, as a preventive measure, air is blown onto the adsorbed single-leaf cardboard material.
When a measurement corrugated cardboard material (continuous corrugated cardboard) obtained by bellows-folding a strip-shaped continuous sheet is passed through a box-making system (automatic packaging system), as shown in FIG. 9, in the feeding process of the box-making system 40, the upper side of the cardboard material 1 The sheet 2 is unfolded in order from the above, and is sent out to the path of the box making system 40 as a band-shaped cardboard web 1W.

Specifically, in the feed process of the box making system 40, a triangular rotating body 41 is provided as a member for supporting the seat 2 in a side view. The rotating body 41 is rotatably supported by a support column 42. The sheet 2 is hung on the upper side of the rotating body 41 and is arranged (so-called “paper threading”) along the path (not shown) of the box making system 40 via the guide roll 43.
The seat 2 lifted by the rotating body 41 is lifted upward from the upper surface of the cardboard material 1 and transported downstream of the transport direction MD.

Even in the feeding process of the box-making system 40, when the sheet 2 is lifted by the rotating body 41, an event that two [sheets] are lifted at the same time may occur. If an air blowing method is adopted as a preventive measure, the web 1W being conveyed by the box-making system 40 may shake, which may lead to a machine stop. Therefore, the measures of blowing air similar to those of the single-wafer corrugated cardboard material are not suitable for the box-making system 40.
The inventors have found that by adjusting the porosity existing near the folds of the continuous corrugated cardboard material, it is possible to prevent the phenomenon that two [sheets] are simultaneously lifted in the feeding process of the box making system.

<Structure B>
--Measurement target--
In Examples B1 to B3 and Comparative Examples B4 and B5 relating to the configuration B, the variation in the position of the crease (hereinafter referred to as “end face deviation”) in the stationary measurement corrugated cardboard material was compared. The measurement corrugated cardboard material according to Examples B1 to B3 and Comparative Examples B4 and B5 has 360 [stages].
The “end surface deviation” is the distance at which the creases of the measured corrugated cardboard material are displaced in the horizontal direction (MD direction) when viewed from the vertical direction (CD direction).

The deviation of the end face was measured by the procedures Ba to Be shown below.
-Procedure Ba: Measure 330 [stages] of the measured corrugated cardboard material excluding 30 [stages] from the top.
It is a fixed target.
-Procedure Bb: Draw a reference line with a marker on the measurement cardboard material measured in procedure Ba.
This reference line corresponds to the above-mentioned reference position BS in one embodiment, and is from the lateral direction.
Observe and make a vertical line passing through the most recessed part in the vertical direction.
-Procedure Bc: The corrugated cardboard material to be measured in Procedure Ba is divided into three parts, upper, middle and lower.
, About each of the 20 [stages] that have the largest deviation in each part
Then, the distance from the reference line in the lateral direction is measured. "Reference line" here
The "distance separated from the lateral direction" corresponds to the "distance dimension BD" of one embodiment.
To do.
-Procedure Bd: A disturbance that reduces the accuracy of the measurement result from the distance measured in the procedure Bc (required)
(Cause) Exclude numerical values that can be (so to speak, those with a large distance).
-Procedure Be: The maximum value of each distance excluding some measurement results in procedure Bd is the end face.
It will be misaligned.

In step Bd, "Exclusion of numerical values that can cause disturbance", when the deviation of the end face measured in all stages of the measured corrugated cardboard material is used as the population, the value whose standard deviation of the population deviates from ± 3σ is excluded. To.
Then, in Examples B1 to B3 and Comparative Examples B4 and B5, the corrugated cardboard materials for measuring the deviation of the end faces shown in Table 7 below were used.

--Evaluation--
The measurement corrugated cardboard materials of Examples B1 to B3 and Comparative Examples B4 and B5 were wrapped in a film, and the tearing of the film was evaluated.
As the film used in this evaluation, a stretch film of the following product and size was used.
・ Product: Super Telite Slim (manufactured by Shikasei Kogyo Co., Ltd.)
-Size: Width dimension 500 [mm],
Thickness 12 [μm]
-Tensile strength: 25 [MPa] in the lateral direction
Height direction 12 [MPa]

The above film was wound around the measurement cardboard material in the following procedure Bf, and the tearing of the film was observed in the following procedure Bg.
-Procedure Bf: Each part of procedure Bc is manually wound around the same place for three turns.
-Procedure Bg: 10 minutes after the implementation of procedure Bf, the film is peeled off from the measurement cardboard material.
Then, the presence or absence of tearing of the film was visually confirmed.

The presence or absence of tearing of the film was evaluated according to the following criteria.
・ ◎: No tear is observed in the film.
-○: A tear of 1 [mm] or more is observed only in the first layer from the inside of the film.
-Δ: A tear of 1 [mm] or more is observed in the first and second layers from the inner layer of the film.
-X: A tear of 1 [mm] or more is observed in all three layers of the film.

In Examples B1 to B3 in which the deviation of the end face was less than 50 [mm], a good evaluation that the film was not easily torn was obtained. Among them, in Example B1 in which the deviation of the end face was less than 15 [mm], the film was not torn, and a good evaluation was obtained.
On the other hand, in Comparative Examples B4 and B5 in which the deviation of the end face was 50 [mm] or more, a poor evaluation was obtained in which the film was easily torn. Among them, in Comparative Example B5 in which the deviation of the end face was 60 [mm] or more, a particularly poor evaluation was obtained.
From the evaluation results of Examples B1 to B3 and Comparative Examples B4 and B5, it can be seen that the measurement cardboard material having an end face deviation of less than 50 [mm] suppresses the damage of the film that wraps the measurement cardboard material.

<Structure C>
--Measurement target--
In Examples C1 to C3 and Comparative Examples C4 and C5 relating to the configuration C, the thickness ratios of the sheets in the stationary measurement cardboard material were compared. Specifically, 101 [stages] in the middle stage of the corrugated cardboard material to be measured was set as the measurement target. That is, the middle section where the sheets are adjacent to each other at 100 [locations] in the height direction was measured.

The "thickness magnification" as used herein means, as described above in one embodiment, a sheet thickness that is vertically overlapped with respect to a reference sheet thickness (referred to as "reference dimension TS" as in one embodiment) (one embodiment). It is a magnification of (referred to as "polymerization dimension CL") as in the form. That is, the thickness magnification is calculated by the following formula C.
Thickness Magnification = Polymerization Dimension CL / Reference Dimension TS ... Formula C
The polymerization dimension CL is a thickness dimension in a pair of sheets that are continuous through the fold at a portion folded back by 5 [mm] in the lateral direction from the fold. The reference dimension TS is the thickness dimension of the sheet 2 per sheet.

The thickness magnification was calculated by the above formula C by measuring the reference dimension TS and the polymerization dimension CL and using the measured reference dimension TS and the polymerization dimension CL.
The reference dimension TS was measured by the following procedures Ca and Cb.
・ Procedure Ca: Select a part of the corrugated cardboard material that is not crushed and make it 10 [cm] square.
It was cut out and pretreated.
-Procedure Cb: After pretreatment with procedure Ca, measure the thickness of each sheet with a ruler, and measure the result.
The average value of the fruits was taken as the reference dimension TS.

The polymerization dimension CL was measured by the following procedures Cc to Cf.
-Procedure Cc: The entire measurement cardboard material is pretreated in the same manner as in procedure Ca.
-Procedure Cd: After pretreatment in procedure Cc, all in the measured corrugated cardboard material (4 [locations]]
), The polymerization size CL was measured with a ruler. That is, 400 [locations]
Measure the polymerization dimension CL at each of (4 [locations] x 100 [locations]).
..
-Procedure Ce: Decrease the accuracy of the measurement result from the polymerization dimension CL measured in the procedure Cd.
Exclude numerical values that can cause disturbance (factor).
-Procedure Cf: Maximum value and maximum of polymerization dimension CL excluding some measurement results in procedure Ce
From the small value, the maximum value and the minimum value of the thickness magnification were calculated by the above formula C.

In the "exclusion of numerical values that can cause disturbance" in procedure Ce, as in the above procedure Bd, when the polymerization dimension CL measured in all stages of the measured corrugated cardboard material is used as the population, the standard of the population is used. Values whose deviation deviates from ± 3σ are excluded.
Then, in Examples C1 to C3 and Comparative Examples C4 and C5, the corrugated cardboard materials for measuring the thickness magnification shown in Table 8 below were used.

--Evaluation--
The transportability of the measured corrugated cardboard materials of Examples C1 to C3 and Comparative Examples C4 and C5 was evaluated.
The term "transportability" as used herein is an evaluation standard corresponding to the quality and stability of the measured corrugated cardboard material when it is conveyed.

The transportability was evaluated based on the deviation of the measured corrugated cardboard material obtained by the transport test by conducting a transport test on the measured corrugated cardboard material (so to speak, bare measurement corrugated cardboard material) not wrapped in a film.
The transfer test was carried out under the following conditions.
-Loading conditions: Place on a transport pallet.
・ Transportation conditions: Forklift (manufactured by Toyota, gene B) transports 10 m at a speed of 15 km.
(Transport).
The deviation of the measured corrugated cardboard material corresponds to the degree of load collapse of the measured corrugated cardboard material, and is the distance at which the measured corrugated cardboard material is displaced before and after the transfer test (hereinafter referred to as “deviation distance”).

The above transportability was evaluated according to the following criteria.
-⊚: The deviation distance is less than 25 [mm].
◯: The deviation distance is 25 [mm] or more and less than 50 [mm].
-Δ: The deviation distance is 50 [mm] or more and less than 100 [mm].
-X: The deviation distance is 100 [mm] or more. Or, the measurement cardboard material completely collapses
Break it.

In Examples C1 to C3 in which the thickness ratio was 1.0 [times] or more and less than 3.0 [times], good evaluation of transportability was obtained. Among them, in Example C3 in which the thickness ratio was 1.5 [times] or more and less than 2.0 [times], excellent transportability was evaluated.
On the other hand, in Comparative Example C4 containing a thickness magnification of less than 1.0 [times] and Comparative Example C5 containing a thickness magnification of 3.0 [times] or more, evaluation of poor transportability was obtained.
According to the evaluation results of Examples C1 to C3 and Comparative Examples C4 and C5, the measured corrugated cardboard material having a thickness magnification of 1.0 [times] or more and less than 3.0 [times] was conveyed. It can be seen that the deviation distance is suppressed and the transportability is ensured.

<Structure C'>
--Measurement target--
In Examples and Comparative Examples relating to the configuration C', the flutes and dimensions, the basis weight and grade of the base paper were different with respect to Examples C10 to C28 and Comparative Examples C29 to C40, and the thickness magnification of the sheets was compared.
In the measured corrugated cardboard materials of Examples C10, C11, C13 and Comparative Examples C31 and C32, the flute, basis weight, packing size, and processing conditions are different from those of Examples C1, C2, C3 and Comparative Examples C4, respectively. It is the same as the measurement cardboard material of C5. In each of the measurement cardboard materials of Examples C12, C14 to C28, Comparative Examples C29, C30, and C33 to C40, at least one of the flute, the basis weight, the packing size, and the processing conditions is the above-mentioned Examples C1 and C2. , C3 and Comparative Examples C4 and C5 are different from the measurement cardboard materials.

Specifically, for each of the measurement cardboard materials of Examples C10 to C28 and Comparative Examples C29 to C40, any one of the three types of flutes shown below was adopted.
-A flute (single flute): Examples C10 to C14, C17 to C28, comparison
Example C29-C32, C35-C40
-E flute (single flute): Example C15, Comparative Example C33
AB flute (double flute): Example C16, Comparative Example C34

The measurement cardboard material of each flute used in each of Examples C10 to C28 and Comparative Examples C29 to C40 was produced by using a corrugator having a stepped roll of the specifications shown below.
> A flute ・ Step height: 4.5 [mm]
・ Number of steps: 34 [mountain / 30 cm]
> E flute ・ Step height: 1.1 [mm]
・ Number of steps: 85 [mountain / 30 cm]
＞ AB Flute ――A Flute――
・ Step height: 4.5 [mm]
・ Number of steps: 34 [mountain / 30 cm]
--B flute--
・ Step height: 2.5 [mm]
・ Number of steps: 50 [mountain / 30 cm]

Of the above three types of flutes, the single flute forming the A flute and the E flute is composed of three base papers (materials) corresponding to each of one core and two liners. The double flute that forms the AB flute is composed of five base papers (materials) corresponding to each of the three cores and the two liners.
In Examples C10 to C28 and Comparative Examples C29 to C40, one of the following eight types of base paper was used for each of the base papers forming the core or liner constituting the respective measurement cardboard materials.

・ No. 1: Product name "OFK EM170", manufactured by Oji Materia Co., Ltd.,
Basis weight 170 [g / m ² ]
・ No. 2: Product name "OFC EM170", manufactured by Oji Materia Co., Ltd.,
Basis weight 170 [g / m ² ]
・ No. 3: Product name "OFLC EM100", manufactured by Oji Materia Co., Ltd.,
Basis weight 100 [g / m ² ]
・ No. 4: Product name "OFK EM210", manufactured by Oji Materia Co., Ltd.,
Basis weight 210 [g / m ² ]
・ No. 5: Product name "OFK EM280", manufactured by Oji Materia Co., Ltd.,
Basis weight 280 [g / m ² ]
・ No. 6: Product name "OFLD EM100", manufactured by Oji Materia Co., Ltd.,
Basis weight 100 [g / m ² ]
・ No. 7: Product name "OND EM160", manufactured by Oji Materia Co., Ltd.,
Basis weight 160 [g / m ² ]
・ No. 8: Product name "ONB EM200", manufactured by Oji Materia Co., Ltd.,
Basis weight 200 [g / m ² ]

Specifically, in each of the measurement cardboard materials of Examples C10 to C28 and Comparative Examples C29 to C40, the base paper forming the liner and the base paper forming the core in the following combinations were used in the following combinations.
(Liner base paper) No. 1, (Core base paper) No. 6: Examples C10 to C16, C23 to
C28, Comparative Examples C29 to C40
(Liner base paper) No. 2, (Core base paper) No. 6: Example C17
(Liner base paper) No. 3, (Core base paper) No. 6: Example C18
(Liner base paper) No. 4, (Core base paper) No. 6: Example C19
(Liner base paper) No. 5, (Core base paper) No. 6: Example C20
(Liner base paper) No. 1, (Core base paper) No. 7: Example C21
(Liner base paper) No. 1, (Core base paper) No. 8: Example C22

No. 1, No. 4, No. For each of the 5 liner base papers, a base paper having a grade of K liner (craft liner) is used. No. 2, No. For each of the 3 liner base papers, a base paper having a grade of C liner (jute liner) is used. The grades are divided according to the amount of pulp compounded, and the K liner is generally harder than the C liner.

In each of the measured corrugated cardboard materials of Examples C10 to C28 and Comparative Examples C29 to C40, one of the nine sizes 1 to 9 shown below was adopted. The number of laminated sheets in the following packaging dimensions is the number of sheets folded with the measured corrugated cardboard material.
・ Size 1: Vertical dimension 1300 [mm],
Horizontal dimension 1150 [mm],
Stacked number 360 [sheets]
・ Size 2: Vertical dimension 1300 [mm],
Horizontal dimension 1150 [mm],
Stacked number 1000 [sheets]

・ Size 3: Vertical dimension 1300 [mm],
Horizontal dimension 1150 [mm],
Stacked number 125 [sheets]
・ Size 4: Vertical dimension 1300 [mm],
Horizontal dimension 1000 [mm],
Stacked number 360 [sheets]
・ Size 5: Vertical dimension 1300 [mm],
Horizontal dimension 1300 [mm],
Stacked number 360 [sheets]
・ Size 6: Vertical dimension 400 [mm],
Horizontal dimension 1150 [mm],
Stacked number 360 [sheets]

・ Size 7: Vertical dimension 1500 [mm],
Horizontal dimension 1150 [mm],
Stacked number 360 [sheets]
・ Size 8: Vertical dimension 1300 [mm],
Horizontal dimension 1150 [mm],
Stacked number 200 [sheets]
・ Size 9: Vertical dimension 1300 [mm],
Horizontal dimension 1150 [mm],
Stacked number 400 [sheets]

Specifically, size 1 was adopted for the measurement cardboard materials of Examples C10 to C14, C17 to C22, and Comparative Examples C29 to C32. Size 2 was adopted as the measurement cardboard material of Example C15 and Comparative Example C33. Size 3 was adopted as the measurement cardboard material of Example C16 and Comparative Example C34. Size 4 was adopted as the measurement cardboard material of Example C23 and Comparative Example C35. Size 5 was adopted as the measurement cardboard material of Example C24 and Comparative Example C36. Size 6 was adopted as the measurement cardboard material of Example C25 and Comparative Example C37. Size 7 was adopted as the measurement cardboard material of Example C26 and Comparative Example C38. Size 8 was adopted as the measurement cardboard material of Example C27 and Comparative Example C39. Size 9 was adopted as the measurement cardboard material of Example C28 and Comparative Example C40.

Then, in Examples C10 to C28 and Comparative Examples C29 to C40, the corrugated cardboard materials for measuring the thickness magnification shown in Tables 9 to 11 below were used. As for the thickness ratio, 101 [stage] in the middle stage of the corrugated cardboard material to be measured was set as the measurement target, as in the above-mentioned Examples C1 to C3 and Comparative Examples C4 and C5. For this thickness magnification, the maximum value and the minimum value were calculated using the formula C at the magnification of the "polymerization dimension CL" with respect to the "reference dimension TS" in the same manner as described above for the configuration C.
The reference dimension TS was measured by the above procedures Ca and Cb, and the polymerization dimension CL was measured by the above procedures Cc to Cf.

In each of Examples C10 to C28 and Comparative Examples C29 to C40, the thickness magnification was adjusted by appropriately selecting the following processing conditions for folding processing, the type and grade of the base paper, the flute, and the like.
In each of Examples C10 to C28 and Comparative Examples C29 to C40, the processing conditions are the conditions of the work in which the operator manually puts a ruled line on the cardboard web and folds it into a bellows fold, and the type of the ruled line jig and the ruled line. Including the depth of.
The ruled line jig is a pushing tool for denting a ruled line forming a crease with the measuring cardboard material.

There are a plurality of "types" of ruled line jigs in which the shape of the portion where the cardboard is pushed is different. The way the cardboard bends along the ruled line differs depending on the shape (type) of the ruled line jig.
The "depth" of the ruled line expresses how much the liner forming the front or back surface of the cardboard is pushed in when the ruled line is recessed in the cardboard with the ruled line jig, as a ratio [%] to the total thickness of the cardboard. The value.

Specifically, the ruled lines of the measurement cardboard materials of Examples C10 to C28 and Comparative Examples C29 to C40 are formed by using a ruled line jig having the following shape, and each ruled line is one of the following five types. Adjusted to one "depth".
-Shape: R ruled line (Examples C10 to C28 and Comparative Examples C29 to C40)
Depth: 70 [%] (Examples C10 to C12, C15 to C28, Comparative Example C29)
50 [%] (Example C13, Comparative Example C31)
30 [%] (Example C14)
20 [%] (Comparative Examples C30, C32 to C40)

--Evaluation--
Two evaluation items, a ruled crack and a broken end face (“break”), were evaluated for the measured corrugated cardboard materials of Examples C10 to C28 and Comparative Examples C29 to C40.
The term "ruled crack" as used herein is an evaluation standard corresponding to the resistance to tearing at a crease when the measured corrugated cardboard material is transported by a forklift or the like.
The term "end face breakage" as used herein is an evaluation standard corresponding to the difficulty of end face breakage when the measured corrugated cardboard material is transported by a forklift or the like. The end face fold is a fold (see reference numeral FA in FIG. 2) that occurs in addition to the fold F set for the bellows fold.

Each of the ruled crack and the broken end face was judged according to the following procedures C1 to C4.
-Procedure C1: The measurement cardboard material is placed on the pallet, and the measurement data is placed on the pallet.
Wrap with stretch film so that the ball material is fixed. Strike
For the retched film, the ratios of Examples B1 to B3 and the ratio according to the above configuration B
A strain of the same product and size as the evaluation of film tear in Comparative Examples B4 and B5
Chifilm was used.
-Procedure C2: The measurement corrugated cardboard material packaged in procedure C1 is subjected to the following temperature and humidity conditions for 24 [hours].
]put.
> Temperature and humidity conditions: temperature 23 [° C], humidity 50 [% Rh]

-Procedure C3: After step C2, use the following vibrator to measure the corrugated cardboard material under the following conditions.
Perform a shocking test.
> Vibration machine: Made by IMV Corporation, product name "multi-axis vibration test device", product number "DS-3"
000-15L "
> Excitation force: 30 [kN]
＞ Vibration method: Random wave
> Frequency: 100 [Hz]
> Temperature and humidity conditions: temperature 23 [° C], humidity 50 [% Rh]
-Procedure C4: After procedure C3, the condition of the creases and end faces was visually confirmed.

The above rule cracking was evaluated according to the following criteria.
・ ◎: There is no change in the measured corrugated cardboard material before and after the test.
・ ○: After the test, the outer liner is torn at the crease (only the surface layer of the liner is torn).
There is no cutting in the ina).
・ △: After the test, the outer liner tears at the crease (the liner is cut and the tear occurs.
The core can be visually confirmed from the grid).
・ ×: After the test, the outer liner is torn at the crease and the crease is crushed.

The above-mentioned end face breakage was evaluated according to the following criteria.
・ ◎: There is no change in the measured corrugated cardboard material before and after the test.
・ ○: After the test, the number of sheets in which the end face is broken in the measured corrugated cardboard material is the total number of sheets.
Less than 3 [%].
・ △: After the test, the number of sheets in which the end face is broken in the measured corrugated cardboard material is the total number of sheets.
More than 3 [%].
・ ×: After the test, the number of sheets in which the end face is broken in the measured corrugated cardboard material is the total number of sheets.
More than 5 [%].

For each of the rule cracking and the broken end face, "○" or more was evaluated as good, and "Δ" or less was evaluated as poor.
As for the rule cracking, the evaluation at the fold that gave the lowest evaluation at the plurality of folds in each of the measured corrugated cardboard materials of Examples C10 to C28 and Comparative Examples C29 to C40 was adopted.

In Examples C10 to C28 in which the thickness ratio was 1.0 [times] or more and less than 3.0 [times], good evaluations were obtained for both the rule cracking and the end face breakage.
On the other hand, in Comparative Examples C29 and C31 containing a thickness magnification of less than 1.0 [times], a good evaluation was obtained for the broken end face, but a poor evaluation was obtained for the cracked rule. In Comparative Examples C30 and C32 to C40 including a thickness magnification of 3.0 [times] or more, good evaluation was obtained due to cracking of the ruled lines, but poor evaluation was obtained due to the bending of the end face.

From the evaluation results of Examples C10 to C28 and Comparative Examples C29 to C40, according to the measurement cardboard material having a thickness magnification of 1.0 [times] or more and less than 3.0 [times], the ruled pattern during transportation It can be seen that cracks and breakage of the end face are suppressed.
If the thickness ratio is less than 1.0 [times], the angle between the folds between the sheets becomes acute, the liner tension is large at the folds, and the line cracks tend to occur easily due to the impact during transportation. is there.
If the thickness ratio is 1.0 [times] or more, the angle formed by the folds between the sheets becomes obtuse, the liner tension is small at the folds, and even if an impact is applied during transportation, rule cracking is unlikely to occur. Tend.

When the thickness magnification exceeds 3.0 [times], the gap between the sheets (see reference numeral S in FIG. 2) becomes large, and the end face is broken due to the weight of the folded sheets and the impact during transportation. It tends to be easier.
If the thickness ratio is less than 3.0 [times], the gaps between the sheets become small, and even if the weight of the folded sheets or the impact during transportation is applied, the end faces tend to be less likely to be broken.

Of Examples C10 to C28, even in Examples C15 to C28 in which the basis weight and grade of the base paper used for the flute, liner and core, or the size of the measured corrugated cardboard material are different from those of Examples C10 to C14, the rule cracks and end faces Since good evaluations of "○" or higher were obtained for both the folds and the folds, the differences in the basis weight and grade of the base paper used for the flute, liner and core, and the dimensions of the measured corrugated cardboard material are the cracks and the end face. It tends not to affect any of the evaluations with the breakage.

Among Examples C10 to C28, from Examples C23 to C28 whose packing dimensions are different from those of Examples C10 to C22, the vertical dimension is 400 [mm] or more and 2500 [mm] or less, and the lateral direction. If the size of is 1000 [mm] or more and 2500 [mm] or less, and the number of laminated sheets is 200 [sheets] or more and 440 [sheets] or less, the difference in packaging dimensions is the cracking of the ruled line and the broken end face. It tends not to affect any of the evaluations.

Among Examples C10 to C28, in Examples C12 to C28 having a thickness magnification of 2.0 [times] or more, excellent evaluation was obtained due to cracking of the ruled lines. Among Examples C10 to C28, in Examples C10 to C12 and C15 to C28 in which the thickness magnification did not exceed 2.5 [times], excellent evaluation was obtained due to the bending of the end face.
In Examples C10 and C11 having a thickness magnification of less than 2.0 [times], only the evaluation of the end face breakage was excellent, and the evaluation of the rule cracking was good. In Examples C13 and C14 in which the thickness magnification exceeds 2.5 [times], only the evaluation of the rule cracking was excellent, and the evaluation of the end face breakage was good. That is, if the thickness magnification is a small value less than 2.0 [times], the evaluation of rule cracking is slightly inferior, and if the thickness magnification is a large value exceeding 2.5 [times], the evaluation of end face breakage is slightly inferior. You can see it.

In view of Examples C10, C11, C13, and C14, when the thickness ratio is 2.0 [times] or more and less than 2.5 [times] from Examples C12, C15 to C28, the rule cracks and the end face are cracked. Excellent evaluation was obtained in both cases of breakage.
According to the evaluation results of Examples C12, C15 to C28, the measurement cardboard material having a thickness magnification of 2.0 [times] or more and less than 2.5 [times] shows cracks in the ruled lines and end faces during transportation. It can be seen that breakage can be prevented.

Measurement of corrugated cardboard with continuous strips folded in a bellows When transporting corrugated cardboard material (continuous corrugated cardboard), the continuous sheets are connected by bellows folds, so they are susceptible to impact during transportation, and the starting point is the crease caused by the bellows fold. There is a problem that the corrugated cardboard tends to be split or the end face is easily broken.
On the other hand, since the single-wafered corrugated cardboard materials are independent one by one, no line cracking or breakage of the end face occurs when a plurality of single-wafered corrugated cardboard materials are transported in a stacked package.
Cracking of the ruled lines and bending of the end face may cause a decrease in the appearance and strength of the assembled box when assembling the box with the measurement cardboard material.
In this case, it can be said that it is an effect peculiar to continuous corrugated cardboard that both suppression of rule cracking and suppression of end face breakage are achieved by adjusting the thickness magnification within a predetermined range.

In the case of single-wafered corrugated cardboard, when the stability is insufficient when a pile of multiple sheets of single-wafered cardboard is stacked alone on a transport pallet, several piles of single-leaf cardboard are placed on the transport pallet. -Means to ensure stability can be adopted by stacking several rows.
On the other hand, in continuous cardboard, it is necessary to apply a set of a transport pallet and a pile of continuous cardboard to a magazine for feeding to a box making system, and as a means for ensuring stability, It was not possible to adopt the same means as the single-wafered cardboard material.

In addition, the single-wafered corrugated cardboard material is applied to the box-making system in a state in which a plurality of single-wafered cardboard materials are set in a predetermined frame provided in the box-making system. There was no problem of collapsing.
In continuous corrugated cardboard, the box-making system is not provided with a predetermined frame in order to ensure the feedability in the box-making system, and the packaging applied to the box-making system is more likely to collapse than the single-wafer cardboard material. Further, in the state where the continuous corrugated cardboard is applied to the box making system, the vibration accompanying the transportation of the corrugated cardboard web (sheet) developed in a strip shape is applied to the pile of the continuous corrugated cardboard, so that further stability is required.

<Structure B'>
--Measurement target--
In Examples and Comparative Examples with respect to the configuration B', the deviation of the end faces in the stationary measurement cardboard material was compared with respect to Examples B10 to B30 and Comparative Examples B31 to B36. In addition, the basis weight of the base paper, thickness magnification, total thickness (standard dimensions), and packing dimensions were also compared.
The measurement cardboard materials of Examples B13 to B15 of Examples B10 to B30 and Comparative Examples B32 and B33 of Comparative Examples B31 to B36 are the above-mentioned Examples B1, B2, B3 and Comparative Example B4. It is the same as each measurement cardboard material of B5. The measurement cardboard materials of Examples B10 to B12 and B16 to B19 are the same as those of Examples B13 to B15 in terms of flute, base paper basis weight, and folding processing conditions.
In each of the measured corrugated cardboard materials of Examples B20 to B30 and Comparative Examples B31 and B34 to B36, at least one of the flute, the basis weight of the base paper, the packing size, and the folding processing conditions is the above-mentioned Example B1, It is different from the measurement cardboard material of B2, B3 and Comparative Examples B4 and B5.

Specifically, in each of the measurement cardboard materials of Examples B10 to B30 and Comparative Examples B31 to B36, one of the five types of flutes shown below was adopted.
-A flute (single flute): Examples B10 to B19, B23 to B30, comparison
Example B31-B35
-B flute (single flute): Example B20
-E flute (single flute): Example B21
-G flute (single flute): Comparative example B36
-AB flute (double flute): Example B22

The measurement cardboard material of each flute used in each of Examples B10 to B30 and Comparative Examples B31 to B36 was produced by using a corrugator having a stepped roll of the specifications shown below.
> A flute ・ Step height: 4.5 [mm]
・ Number of steps: 34 [mountain / 30 cm]
> B flute ・ Step height: 2.5 [mm]
・ Number of steps: 50 [mountain / 30 cm]
> E flute ・ Step height: 1.1 [mm]
・ Number of steps: 85 [mountain / 30 cm]
> G flute ・ Step height: 0.5 [mm]
・ Number of steps: 177 [mountain / 30 cm]
＞ AB Flute ――A Flute――
・ Step height: 4.5 [mm]
・ Number of steps: 34 [mountain / 30 cm]
--B flute--
・ Step height: 2.5 [mm]
・ Number of steps: 50 [mountain / 30 cm]

Of the above five types of flutes, the single flute that forms the A flute, B flute, E flute, and G flute is composed of three base papers (materials) corresponding to each of one core and two liners. .. The double flute that forms the AB flute is composed of five base papers (materials) corresponding to each of the three cores and the two liners.
In Examples B10 to B30 and Comparative Examples B31 to B36, one of the following seven types of base paper was used for each of the base papers forming the core or liner constituting the respective measurement cardboard materials.

・ No. 1: Product name "OFK EM170", manufactured by Oji Materia Co., Ltd.,
Basis weight 170 [g / m ² ]
・ No. 2: Product name "OFK EM210", manufactured by Oji Materia Co., Ltd.,
Basis weight 210 [g / m ² ]
・ No. 3: Product name "OFLC EM120", manufactured by Oji Materia Co., Ltd.,
Basis weight 120 [g / m ² ]
・ No. 4: Product name "OFC EM170", manufactured by Oji Materia Co., Ltd.,
Basis weight 170 [g / m ² ]
・ No. 5: Product name "OFK EM280", manufactured by Oji Materia Co., Ltd.,
Basis weight 280 [g / m ² ]
・ No. 6: Product name "OND EM160", manufactured by Oji Materia Co., Ltd.,
Basis weight 160 [g / m ² ]
・ No. 7: Product name "OND EM120", manufactured by Oji Materia Co., Ltd.,
Basis weight 120 [g / m ² ]

Specifically, in each of the measurement cardboard materials of Examples B10 to B30 and Comparative Examples B31 to B36, the base paper forming the liner and the base paper forming the core in the following combinations were used in the following combinations.
(Liner base paper) No. 1, (Core base paper) No. 6: Examples B10 to B25, B30,
Comparative Examples B31 to B33, B36
(Liner base paper) No. 2, (Core base paper) No. 6: Example B26
(Liner base paper) No. 3, (Core base paper) No. 6: Example B28
(Liner base paper) No. 4, (Core base paper) No. 6: Example B29
(Liner base paper) No. 5, (Core base paper) No. 6: Comparative Example B34
(Liner base paper) No. 1, (Core base paper) No. 7: Example B27
(Liner base paper) No. 1, (Core base paper) No. 5: Comparative Example B35

Of the above seven types of base paper, No. 3, No. For each liner base paper of No. 4, a base paper having a grade of C liner (jute liner) is used. Of the above seven types of base paper, No. 1, No. 2, No. For each liner base paper of 5, a base paper having a grade of K liner (craft liner) is used. The grades are divided according to the amount of pulp compounded, and the K liner is generally harder than the C liner.

For each of the measured corrugated cardboard materials of Examples B10 to B30 and Comparative Examples B31 to B36, one of the four sizes 1 to 4 shown below was adopted.
・ Size 1: Vertical dimension 1300 [mm],
Horizontal dimension 1150 [mm],
Height dimension 1800 [mm]
・ Size 2: Vertical dimension 1300 [mm],
Horizontal dimension 1000 [mm],
Height dimension 1800 [mm]
・ Size 3: Vertical dimension 600 [mm],
Horizontal dimension 1150 [mm],
Height dimension 1800 [mm]
・ Size 4: Vertical dimension 1300 [mm],
Horizontal dimension 1150 [mm],
Height dimension 900 [mm]

Specifically, size 1 was adopted for each of the measurement cardboard materials of Examples B10 to B22, B26 to B30, and Comparative Examples B31 to B36. Size 2 was adopted as the measurement cardboard material of Example B23. Size 3 was adopted as the measurement cardboard material of Example B24. Size 4 was adopted as the measurement cardboard material of Example B25.

Then, in Examples B10 to B30 and Comparative Examples B31 to B36, the corrugated cardboard materials for measuring the end face deviation, the thickness magnification, and the reference dimensions shown in Tables 12, 13, and 14 below were used.
The deviation of the end face is measured by the same procedure as the above-mentioned procedures Ba to Be for the evaluation of the following "film tear A", and the measurement procedure for the evaluation of the following "film tear B" and "film tear C". Was partially changed from the above procedures Ba to Be.

Specifically, in each of "film tear B" and "film tear C", the deviation of the end face was measured by the following procedures Bh to Bl. Even if the measurement procedure was changed between "film tear A", "film tear B", and "film tear C", the measured end face deviation value did not change.

-Procedure Bh: The total number of stages of the corrugated cardboard material to be measured is measured.
-Procedure Bi: The measurement cardboard material to be measured in Procedure Bh is placed on a pallet. This
On the pallet, measure the cardboard material and the vertical and horizontal dimensions of the bottom surface.
A pallet with a mounting surface that has a vertical dimension equal to or greater than the law and a mounting surface that exceeds the horizontal dimension.
Using.
-Procedure Bj: Reference line (reference position BS) on the corrugated cardboard material to be measured in procedure Bh.
With a marker. The reference line is the same line as the above-mentioned procedure Bb.
-Procedure Bk: The deviation is the largest among the measured corrugated cardboard materials measured in Procedure Bh.
The distance (separation dimension BD) that is laterally separated from the reference line for the step
Measure. This "distance" is the same distance as the above-mentioned procedure Bc.
-Procedure Bl: The distance measured in the procedure Bk is defined as the deviation of the end face.

In the configuration B', the "thickness magnification" is the maximum value of the thickness magnification calculated by the above formula C. The reference dimension TS (total thickness) was measured by the same procedure as the above-mentioned procedures Ca and Cb. The polymerization dimension CL was measured in the same procedure as the above-mentioned procedures Cc to Cf.
In each of Examples B10 to B30 and Comparative Examples B31 to B36, the following folding processing conditions, base paper type, grade, flute, etc. are appropriately selected for each of the "end face deviation" and the "thickness magnification". It was adjusted by doing.
In each of Examples B10 to B30 and Comparative Examples B31 to B36, the processing conditions are the conditions for the worker to manually put a ruled line on the cardboard web and fold it into a bellows fold, and the type of the ruled line jig and the ruled line. Includes the "width dimension" of the jig.
The ruled line jig is a pushing tool for denting a ruled line forming a crease with the measuring cardboard material.

There are a plurality of "types" of ruled line jigs in which the shape of the portion where the cardboard is pushed is different. The way the cardboard bends along the ruled line differs depending on the shape (type) of the ruled line jig.
The "depth" of the ruled line expresses how much the liner forming the front or back surface of the cardboard is pushed in when the ruled line is recessed in the cardboard with the ruled line jig, as a ratio [%] to the total thickness of the cardboard. The value.
The "width dimension" of the ruled line jig is an interval dimension separated in the second direction by the ruled line, and there are a plurality of width dimension ruled line jigs for each shape (type) of the ruled line jig.
The "depth" of the ruled line expresses how much the liner forming the front or back surface of the cardboard is pushed in when the ruled line is recessed in the cardboard with the ruled line jig, as a ratio [%] to the total thickness of the cardboard. The value.

In Examples B10 to B30 and Comparative Examples B31 to B36, any one of the following three types is formed by using a ruled line jig having any one of the following three width dimensions, and each ruled line is formed. It was adjusted to the "depth" of any one of the following three ways.
-Shape (type): R ruled line (Examples B10 to B25, B27 to B29, comparative examples B32, B
33, B35, B36)
Square ruled line (Example B30)
Convex ruled line (Example B26, Comparative example B31, B34)
Width dimension: 3 [mm] (Examples B10 to B30, Comparative Examples B32 to B35)
2 [mm] (Comparative Example B31)
1.4 [mm] (Comparative Example B36)
Depth: 50 [%] (Examples B10 to B17, B20 to B26, B29,
Comparative Examples B32, B33, B35, B36)
65 [%] (Example B18, Comparative Examples B31, B34)
30 [%] (Examples B19, B27, B28, B30)

--Evaluation--
In Examples B10 to B30 and Comparative Examples B31 to B36, each of the measured corrugated cardboard materials was wrapped in a film, and the tearing of the film was evaluated. The evaluation of film tear was carried out in each of Examples B10 to B30 and Comparative Examples B31 to B36 by using three methods of "film tear A", "film tear B", and "film tear C".

In "Film tear A", the same film as the above-mentioned "Film tear" was used, and the film tear was observed by the same procedure as the above-mentioned procedures Bf and Bg, and evaluated by the same criteria as described above.
In "Film tear B", the same film as in "Film tear A" is used, but the packaging and tear confirmation procedures are changed from the above procedures Bf and Bg.
Specifically, in the above procedure Bf, the film is manually triple-wound on the corrugated cardboard material, whereas in "Film tear B", the film is single-layered on the corrugated cardboard material measured by the following procedure Bm. The difference is that it is wound. Further, the method for confirming the presence or absence of tearing of the film has also been changed from the above-mentioned procedure Bg to the following procedures Bn and Bo.

・ Procedure Bm: Use the following film wrapping machine to wrap the cardboard material for one round.
carry out.
-Film wrapping machine: DIA-MAC30LXV (manufactured by Shikasei Kogyo Co., Ltd.)
-Film packaging conditions: Tension output: 70 [%], Carriage output: 70 [%]
], Table rotation speed output: 70 [%]
The "carriage output" is the vertical movement speed of the film.
-Procedure Bn: 10 minutes after the implementation of procedure Bm, visually check for tearing of the film.
To do.
-Procedure Bo: If no tear was confirmed in procedure Bn, the following transport test was performed.
Later, the presence or absence of tearing of the film is visually confirmed.

The transport test is carried out using a forklift (manufactured by Toyota, gene B) according to the following procedures Bp to Bs.
-Procedure Bp: The measurement cardboard material on which the film was wound in the above procedure Bm was placed.
To carry the measurement cardboard material by inserting a fork into the let, the following
Tilt and raise the mast to meet the conditions of. At this time, the impact is measured
Care was taken not to join the cardboard material.
・ Mast forward tilt angle: 3 ± 1 [°]
・ Mast backward tilt angle: 5 ± 1 [°]
-Dimensions that separate the mast from the lower end surface to the ground: 10 to 20 [mm]

-Procedure Bq: After procedure Bp, four at a speed of 5 [m / min] under the following driving conditions.
Run the clift.
・ Road surface: Flat and dry paved road ・ Stage 1: 5 [m / min] from the starting point to reach the following point A
Accelerate to speed ・ Stage 2: Run at a constant speed of 5 [m / min] between point A and point B below
To do.
・ Stage 3: Gradually slow down from point B and stop at the following point B ・ Point A: 10 [m] from the start point of travel ・ Point B: 30 [m] from the start point of travel ・ Point C : 40 [m] from the starting point

・ Procedure Br: Control the mast so that the fork is parallel to the ground, and then lower the mast.
Lower and lower the pallet on which the measurement cardboard material is placed to the ground. This
At this time, care was taken not to apply the impact to the measured corrugated cardboard material.
-Procedure Bs: After the procedure Br, the presence or absence of tearing of the film is confirmed by the above-mentioned procedure Bo.
-Procedure Bt: If no tear is confirmed in step Bs, follow step Bq above.
Change the clift speed to 15 [m / min] and practice steps Bp to Bs.
After the application, the presence or absence of tearing of the film is confirmed by the above procedure Bo.

"Film tear C" is a film made by wrapping a form around a corrugated cardboard material in the same procedure as the above procedure Bm to Bo, except that the film used for evaluation is a stretch film of the following product and size. I confirmed the tear.
・ Product: Diamond Stretch Excel (manufactured by Shikasei Kogyo Co., Ltd.)
-Size: Width dimension 500 [mm],
Thickness 13 [μm]
-Tensile strength: 95 [MPa] in the lateral direction
Height direction 50 [MPa]

Film tear The presence or absence of film tear in B and C was evaluated according to the following criteria.
-◎: No tear is observed in the film after the procedure Bo.
-○: After the procedure Bt, tearing is observed in the film.
-Δ: Tear is observed in the film after the procedure Bs.
-X: After step Bn, tearing is observed in the film.
In the examples and comparative examples relating to the configuration B', "○" or more was regarded as a good evaluation for the film tears B and C.

In addition, the feedability (“feedability 2”) and transportability of the measured corrugated cardboard materials of Examples B10 to B30 and Comparative Examples B31 to B36 were evaluated.
This feedability 2 is an evaluation standard corresponding to the stability of processing in various processes such as the feed process, the cutting process, and the fold process in the box making system, and the quality of the box manufactured by the box making system.
This transportability is an evaluation standard corresponding to the stability of the measured corrugated cardboard material when the measured corrugated cardboard material is transported by a forklift or the like and the resistance to tearing at the creases.

Feedability 2 is produced when the measured corrugated cardboard materials of Examples B10 to B27 and Comparative Examples B28 to B33 are applied to the following box-making system to manufacture a box under the following manufacturing conditions (box-making speed and box dimensions). The evaluation was based on the boxability, the quality of the manufactured boxes, and the presence or absence of a stop (also called "machine stop") in the box making system.
Box making system: CMC, product name "CMC Carton Wrap 1000"
Box making speed: 500 [box per hour]
Box dimensions: Vertical 230 [mm]
: Horizontal 355 [mm]
: Height 145 [mm]

Feedability 2 was evaluated according to the following criteria.
・ ◎: Machines can be cut to the specified size without stopping, and boxes can be manufactured.
・ ○: Machines can be cut to the specified size without stopping, but the box cannot be made neatly (
The box is distorted, the box is not the specified size, or the ruled lines are misaligned.
).
・ △: The measured corrugated cardboard material is fed to the box making system, but it is large during the feed.
Shaking movement Cannot cut to the specified size and does not lead to box making (machine stop occurs).
-×: The measurement cardboard material is not fed to the box making system (machine stop occurs).
In the examples and comparative examples relating to the configuration B', "○" or more was regarded as a good evaluation for the feedability 2.

The transportability was determined according to the following procedures B1 to B4 similar to the above procedures C1 to C4.
-Procedure B1: The measurement cardboard material is placed on the pallet, and the measurement data is placed on the pallet.
Wrap with stretch film so that the ball material is fixed. Strike
For the retched film, the ratios of Examples B1 to B3 and the ratio according to the above configuration B
A strain of the same product and size as the evaluation of film tear in Comparative Examples B4 and B5
Chifilm was used.
-Procedure B2: The measurement corrugated cardboard material packaged in step B1 is subjected to the following temperature and humidity conditions for 24 [hours].
]put.
> Temperature and humidity conditions: temperature 23 [° C], humidity 50 [% Rh]

-Procedure B3: After step B2, use the following vibrator to measure the corrugated cardboard material under the following conditions.
Perform a shocking test.
> Vibration machine: Made by IMV Corporation, product name "multi-axis vibration test device", product number "DS-3"
000-15L "
> Excitation force: 30 [kN]
＞ Vibration method: Random wave
> Frequency: 100 [Hz]
> Temperature and humidity conditions: temperature 23 [° C], humidity 50 [% Rh]
-Procedure B4: After step B3, visually check the stability of the measured corrugated cardboard material and the state of the creases.
did.

The above transportability was evaluated according to the following criteria.
・ ◎: There is no change in the measured corrugated cardboard material before and after the test.
・ ○: After the test, the outer liner is torn at the crease (only the surface layer of the liner is torn).
There is no cutting in the ina).
・ △: After the test, the outer liner tears at the crease (the liner is cut and the tear occurs.
The core can be visually confirmed from the grid).
・ ×: After the test, the outer liner is torn at the crease, and the crease is crushed or
, The measurement cardboard material collapses.
In the examples and comparative examples relating to the configuration B', "○" or more was regarded as a good evaluation in terms of transportability.

The deviation of the end face is 50 [mm] or less, the thickness magnification is 1.0 [times] or more, the standard dimension is 1 [mm] or more, and the basis weight of the base paper is less than 280 [g / m ² ]. In certain Examples B10 to B30, all of the film tears A, B, and C were evaluated as "○" or higher. Further, in Examples B10 to B30, the transportability was also evaluated as “◯” or higher.
Among them, the deviation of the end face is less than 15 [mm], the thickness magnification is 1.5 [times] or more and 2.5 [times] or less, and the reference dimension is 2 [mm] or more and 8 In Examples B10 to B13, B22, B27 to B29 in which the basis weight is less than [mm] and the basis weight of the base paper is less than 200 [g / m ² ], all of the film tears A, B, and C are evaluated as “◎”. was gotten.

On the other hand, the deviation of the end face is larger than 50 [mm], the thickness magnification is less than 1.0 [times], the standard dimension is 1 [mm] or less, or the basis weight of the base paper is 280 [g]. / M ² ] or more, in Comparative Examples B31 to B36, at least one of the film tears A, B, and C was evaluated as “Δ” or less.
In particular, in Comparative Example B33 in which the deviation of the end face was larger than 55 [mm] and Comparative Example B36 in which the reference dimension was 1 [mm] or less, the film tears A, B, and C were all evaluated as "x". ..

In view of Comparative Examples B31 to B36, from Examples B10 to B30, the deviation of the end face is 50 [mm] or less, the thickness magnification is 1.0 [times] or more, and the reference dimension is 1 [mm] or more. It can be seen that if the basis weight of the base paper is less than 280 [g / m ² ], damage to the film that wraps the measured corrugated cardboard material can be suppressed. Moreover, the deviation of the end face is less than 15 [mm], the thickness magnification is 1.5 [times] or more and 2.5 [times] or less, and the reference dimension is 2 [mm] or more and 8 [. If it is less than mm] and the basis weight of the base paper is less than 200 [g / m ² ], it can be said that damage to the film that wraps the measured corrugated cardboard material can be prevented.

From Examples B10 to B30, almost the same evaluation was obtained by any of the film tearing methods A, B, and C, and the difference in the evaluation methods, specifically, the film winding method and the film thickness. It is presumed that the difference between the two does not have a great influence on the evaluation of film tear.
Further, among Examples B10 to B30, the grades of the base paper are different from those of Examples B10 to B17 and B29, which have the same flute, the basis weight, size, and processing conditions of the base paper but different grades of the base paper. Is presumed not to affect the suppression of film breakage.

Generally, the package size of the measured corrugated cardboard material is 2500 [mm] or less in the vertical direction, 2500 [mm] or less in the horizontal direction, and 2000 [mm] or less in the height direction. is there.
Among Examples B10 to B30, from Examples B23 to B25 having different packaging dimensions, the vertical dimension is 500 [mm] or more and 2500 [mm] or less, and the horizontal dimension is 900 [mm]. If the above is 2500 [mm] or less, and the dimension in the height direction is 800 [mm] or more and 2000 [mm] or less, the difference in packaging dimensions does not affect the suppression of film breakage. Tend.

Generally, the total thickness (reference dimension) of the sheet made of the measured corrugated cardboard material is 10 [mm] or less. In view of Comparative Example B36, the reference dimensions from Examples B10 to B30 are preferably 1 [mm] or more and 10 [mm] or less.
Further, the thickness magnification is generally 4.0 [times] or less. From Examples B10 to B30, the thickness magnification is 1.0 [times] or more and 4.0 [times] or less, and 1.0 [times] or more and 3.5 [times] or less. preferable.

Further, if the basis weight of the base paper generally used for the liner constituting the measured corrugated cardboard material is 120 [g / m ² ] or less, the strength of the box becomes insufficient when the box is assembled using the measured corrugated cardboard material. When the basis weight of the base paper is 210 [g / m ² ] or less, the foldability (easiness to fold) at the crease tends to be good.

Among Examples B10 to B30, in Examples B10 to B29 in which the thickness magnification is 1.0 [times] or more and 3.0 [times] or less, the film tears A, B, C and the feedability 2 In all the evaluations, the evaluation of "○" or more was obtained. On the other hand, among Examples B10 to B30, in Example B30 having a thickness magnification of 3.0 [times] or more, although the film tears A, B, and C were evaluated as "○" or more, the feedability 2 The evaluation of "△" or less was obtained.

In view of Example B30, from Examples B10 to B29, the deviation of the end face is 50 [mm] or less, the thickness magnification is 1.0 [times] or more and 3.0 [times] or less, and the reference dimensions. When is 1 [mm] or more and the basis weight of the base paper is less than 280 [g / m ² ], it can be said that the feedability 2 can be ensured in addition to suppressing the damage of the film.
If the deviation of the end face is larger than 50 [mm], when applying the measurement cardboard material to the automatic packaging system (box making system), an impact is likely to occur when feeding the measurement cardboard material to the box making system, and the feed is likely to occur. Gender 2 tends to be difficult to secure.
If the thickness ratio is larger than 3.5 [times], the fold portion becomes bulky, and there is a possibility that the upright stability of the packaging of the measured corrugated cardboard material cannot be ensured.

In Examples B10 to B30 and Comparative Examples B31 and B34 to B36 in which the deviation of the end face was 50 [mm] or less, a good evaluation of “◯” or more was obtained in terms of transportability.
On the other hand, in Comparative Examples B32 and B33 in which the deviation of the end face exceeds 50 [mm], a poor evaluation of “◯” or more was obtained in terms of transportability.
Further, among Examples B10 to B30, in Examples B12 to B30 in which the deviation of the end face is 4 [mm] or more, the excellent evaluation of "◎" in transportability is obtained, whereas the end face is obtained. In Examples B10 and B11 in which the deviation was smaller than 4 [mm], the evaluation of transportability was “◯”.

In view of Comparative Examples B32 and B33, the deviation of the end face is 50 [mm] or less, the thickness magnification is 1.0 [times] or more, and the reference dimension is 1 [mm] or more from Examples B10 to B30. If the basis weight of the base paper is less than 280 [g / m ² ], it can be said that the film can be prevented from being damaged and the transportability can be ensured.
Further, in view of Examples B10 and B11, when the deviation of the end faces is 4 [mm] or more and 50 [mm] or less from Examples B12 to B30, it can be said that the transportability is excellent.
In addition, when the thickness ratio is 3.0 [times] or less, it can be said that the feedability 2 can be ensured in addition to the suppression of film breakage and the securing of transportability as described above.

When the deviation of the end face is 4 [mm] or more, a range of motion 30 (see FIG. 5) is generated between the ruled line Cr and the actual crease F. Even if vibration is applied during the transportation of the corrugated cardboard material, it is presumed that the range of motion 30 releases the stress of the vibration, prevents damage to the folds, and improves transportability.
If the deviation of the end face is smaller than 4 [mm], the range of motion 30 is hardly generated between the ruled line Cr and the actual crease F, so that the stress of vibration is applied when vibration is applied during the transportation of the measured corrugated cardboard material. It is presumed that it will be difficult to escape, and the folds will be easily damaged, resulting in poor transportability.
If the deviation of the end face is larger than 50 [mm], the area between the ruled line Cr and the actual crease F is too large to function as a range of motion, and the stress of vibration is concentrated on one crease. It is presumed that the creases are likely to be damaged.
In general, an ideal shape with an end face deviation of 0 [mm] seems to be preferable, but when applying a bellows-folded measurement cardboard material (continuous cardboard) to a box-making system, the above reasons Therefore, continuous cardboard can be used more efficiently if the end face is misaligned.

Measurement of corrugated cardboard with continuous strips folded in a bellows When transporting corrugated cardboard material (continuous corrugated cardboard), the continuous sheets are connected by bellows folds, so they are susceptible to impact during transportation and are damaged by the bellows folds. There is a problem that it tends to occur.
On the other hand, since the single-wafered corrugated cardboard materials are independent one by one, the folds are not damaged when the plurality of single-wafered corrugated cardboard materials are transported in a stacked package.
In this case, improving transportability by adjusting the deviation of the end face within a predetermined range can be said to be an effect peculiar to continuous corrugated cardboard.

<Structure D>
--Measurement target--
In Examples D1 to D3 and Comparative Examples D4 and D5 regarding the configuration D, the magnifications of the intervals between the folds in the stationary measurement cardboard material were compared. Specifically, 101 [stages] in the middle stage of the corrugated cardboard material to be measured was set as the measurement target. That is, the upper portions where the sheets are adjacent to each other at 100 [locations] in the height direction were measured.

The "magnification of the interval" as used herein means, as described above in one embodiment, the interval between creases with respect to the reference sheet thickness (referred to as "reference dimension TS" as in one embodiment) (one embodiment). It is a magnification of (referred to as "interval DI") as in the form. That is, the magnification of the interval is calculated by the following formula D.
Magnification of interval = interval DI / reference dimension TS ... Equation D

The magnification of the interval was calculated by the above formula D by measuring the reference dimension TS and the interval DI and using the measured reference dimension TS and the interval DI. The reference dimension TS was measured by the same procedure as the above-mentioned procedures Ca and Cb. The interval DI was measured by the following procedures Da to Dd.
-Procedure Da: Similar to the procedure Cc described above, the entire measurement cardboard material is pretreated.
-Procedure Db: Similar to the above-mentioned procedure Cd, the entire measurement cardboard material is pretreated by procedure Da.
After that, the interval D at all (4 [locations]) corners of the measured corrugated cardboard material.
Measure I with a ruler.
-Procedure Dc: As in the above-mentioned procedure Ce, the measurement result is obtained from the interval DI measured in the procedure Db.
Exclude numerical values that can be a disturbance (factor) that reduces the accuracy of the fruit.
-Procedure Dd: Maximum and minimum values of interval DI for which some measurement results were excluded in procedure Dc.
Therefore, the maximum value and the minimum value of the magnification of the interval were calculated by the above formula D.

In the "exclusion of numerical values that can cause disturbance" in the procedure Dc, the interval DI measured in all stages of the measured corrugated cardboard material is used as the population as in the above-mentioned procedures Bd and Ce. Then, for the larger value of the interval DI, the value whose population standard deviation deviates from ± 4σ is excluded. For smaller values of the interval DI, values whose population standard deviation deviates from ± 3σ are excluded.
Then, in Examples D1 to D3 and Comparative Examples D4 and D5, the corrugated cardboard materials for measuring the magnification of the intervals shown in Table 15 below were used.

--Evaluation--
The uprightness was evaluated with respect to the measured corrugated cardboard materials of Examples D1 to D3 and Comparative Examples D4 and D5.
The term "uprightness" as used herein is an evaluation standard corresponding to the quality of the fixed form and stability when an impact is applied to the measured corrugated cardboard material.

The uprightness was evaluated based on the deviation of the measured corrugated cardboard material obtained by the collision test after performing a collision test on the measured corrugated cardboard material not wrapped in the film.
In the collision test, a sandbag of 10 [kg] (length 61 [cm] x width 46.5 [cm] was used) was placed at a speed of 24 km / h in a portion 1000 [mm] from the bottom of the corrugated cardboard material to be measured. I made it collide.
The deviation of the measured corrugated cardboard material corresponds to the degree of load collapse of the measured corrugated cardboard material, and is the distance at which the measured corrugated cardboard material is displaced before and after the transfer test (hereinafter referred to as “deviation distance”). The deviation distance is the distance at which the folds of the measured corrugated cardboard material are displaced in the vertical direction (CD direction) when viewed from the horizontal direction (MD direction) on the end face provided with the creases.

The "deviation distance" referred to here is measured by the following procedures Xa to Xd.
-Procedure Xa: Of the corrugated cardboard material to be measured, the part excluding 30 [stages] from the top is the measurement target.
To do.
-Procedure Xb: Draw a reference line with a marker on the corrugated cardboard material to be measured in procedure Xa.
This reference line is drawn on the extending surface of the fold perpendicular to the ground.
-Procedure Xc: Collision with the central part of the step height of the measurement cardboard material measured in procedure Xa.
A crash test will be conducted as a location. After that, it separates from the reference line in the CD direction.
Measure the distance.
-Procedure Xd: The maximum value of the procedure Xc is set as the deviation distance.
The above-mentioned deviation distance measuring procedure is incorporated into the deviation distance measuring procedure measured in the transport test according to the configuration C.

The above-mentioned uprightness was evaluated by the following criteria as well as the transportability.
-⊚: The deviation distance is less than 25 [mm].
◯: The deviation distance is 25 [mm] or more and less than 50 [mm].
-Δ: The deviation distance is 50 [mm] or more and less than 100 [mm].
-X: The deviation distance is 100 [mm] or more. Or, the measurement cardboard material completely collapses
Break it.

In Examples D1 to D3 in which the magnification of the interval was 1.0 [times] or more and less than 3.0 [times], good evaluation of uprightness was obtained. Among them, in Example D3 in which the magnification of the interval was 1.5 [times] or more and less than 2.5 [times], an excellent evaluation of uprightness was obtained.
On the other hand, in Comparative Example D4 containing a magnification of less than 1.0 [times] and Comparative Example D5 including a magnification of 3.0 [times] or more, an evaluation of poor uprightness was obtained.
According to the evaluation results of Examples D1 to D3 and Comparative Examples D4 and D5, the measurement cardboard material having an interval magnification of 1.0 [times] or more and less than 3.0 [times] is displaced due to collision. It can be seen that the distance is suppressed and the uprightness is ensured.

<Structure D'>
--Measurement target--
In Examples and Comparative Examples with respect to the configuration D', the magnification of the fold-to-crease interval in the stationary measurement cardboard material was compared with respect to Examples D10 to D25 and Comparative Examples D26 to D30. In addition, the packaging dimensions were also compared.
In the measurement cardboard materials of Examples D10, D11, D12, and Comparative Examples D26 and D27, the thickness, basis weight, and dimensions of the corrugated cardboard materials are the measurements of Examples D1, D2, D3 and Comparative Examples D4 and D5 described above, respectively. It is the same as the cardboard material. In each of the measured corrugated cardboard materials of Examples D13 to D25 and Comparative Examples D28 to D30, the thickness, basis weight, and dimensions are the same as those of the above-mentioned Examples D1, D2, D3 and Comparative Examples D4, D5. It's different.

Specifically, for each of the measurement cardboard materials of Examples D10 to D25 and Comparative Examples D26 to D30, any one of the five types of flutes shown below was adopted.
A flute (single flute): Examples D10 to D12, D17 to D25, comparison
Example D26-D30
B flute (single flute): Example D13
-C flute (single flute): Example D14
-E flute (single flute): Example D15
AB Flute (Double Flute): Example D16

The measurement cardboard material of each flute used in each of Examples D10 to D25 and Comparative Examples D26 to D30 was produced by using a corrugator having a stepped roll of the specifications shown below.
> A flute ・ Step height: 4.5 [mm]
・ Number of steps: 34 [mountain / 30 cm]
> B flute ・ Step height: 2.5 [mm]
・ Number of steps: 50 [mountain / 30 cm]
> C flute ・ Step height: 3.5 [mm]
・ Number of steps: 40 [mountain / 30 cm]
> E flute ・ Step height: 1.1 [mm]
・ Number of steps: 85 [mountain / 30 cm]
＞ AB Flute ――A Flute――
・ Step height: 4.5 [mm]
・ Number of steps: 34 [mountain / 30 cm]
--B flute--
・ Step height: 2.5 [mm]
・ Number of steps: 50 [mountain / 30 cm]

For each of the measurement cardboard materials of Examples D10 to D25 and Comparative Examples D26 to D30, any one of the following two types of core base paper was adopted.
・ No. 1: Product name "OND EM160", manufactured by Oji Materia Co., Ltd.,
Basis weight 160 [g / m ² ]
・ No. 2: Product name "OND EM120", manufactured by Oji Materia Co., Ltd.,
Basis weight 120 [g / m ² ]
For each of the measurement cardboard materials of Examples D10 to D25 and Comparative Examples D26 to D30, any one of the four types of liner base paper shown below was adopted.
・ No. 3: Product name "OFK EM170", manufactured by Oji Materia Co., Ltd.,
Basis weight 170 [g / m ² ]
・ No. 4: Product name "OFLC EM120", manufactured by Oji Materia Co., Ltd.,
Basis weight 120 [g / m ² ]
・ No. 5: Product name "OFC EM170", manufactured by Oji Materia Co., Ltd.,
Basis weight 170 [g / m ² ]
・ No. 6: Product name "OFK EM210", manufactured by Oji Materia Co., Ltd.,
Basis weight 210 [g / m ² ]

Specifically, in each of the measurement cardboard materials of Examples D10 to D25 and Comparative Examples D26 to D30, the base paper forming the liner and the base paper forming the core in the following combinations were used in the following combinations.
(Liner base paper) No. 3, (Core base paper) No. 1: Examples D10 to D16, D21
D25, Comparative Examples D26 to D30
(Liner base paper) No. 4, (Core base paper) No. 1: Example D17
(Liner base paper) No. 5, (Core base paper) No. 1: Example D18
(Liner base paper) No. 6, (Core base paper) No. 1: Example D19
(Liner base paper) No. 3, (Core base paper) No. 2: Example D20

Of the above seven types of base paper, No. 4, No. For each liner base paper of 5, a base paper having a grade of C liner (jute liner) is used. Of the above seven types of base paper, No. 3, No. For each liner base paper of No. 6, a base paper having a grade of K liner (craft liner) is used. The grades are divided according to the amount of pulp compounded, and the K liner is generally harder than the C liner.

For each of the measurement cardboard materials of Examples D10 to D25 and Comparative Examples D26 to D30, any one of the eight sizes 1 to 8 shown below was adopted.
・ Size 1: Vertical dimension 1300 [mm],
Horizontal dimension 1150 [mm],
Height dimension 1800 [mm]
・ Size 2: Vertical dimension 900 [mm],
Horizontal dimension 1150 [mm],
Height dimension 1800 [mm]
・ Size 3: Vertical dimension 1300 [mm],
Horizontal dimension 1000 [mm],
Height dimension 1800 [mm]
・ Size 4: Vertical dimension 1300 [mm],
Horizontal dimension 1150 [mm],
Height dimension 1200 [mm]

・ Size 5: Vertical dimension 900 [mm],
Horizontal dimension 1000 [mm],
Height dimension 1200 [mm]
・ Size 6: Vertical dimension 1300 [mm],
Horizontal dimension 800 [mm],
Height dimension 1800 [mm]
・ Size 7: Vertical dimension 800 [mm],
Horizontal dimension 1150 [mm],
Height dimension 1800 [mm]
・ Size 8: Vertical dimension 1300 [mm],
Horizontal dimension 1150 [mm],
Height dimension 600 [mm]

The magnification of the interval was calculated by the above formula D. The reference dimension TS was measured by the same procedure as the above-mentioned procedures Ca and Cb. The interval DI was measured in the same procedure as the above-mentioned procedures Da to Dd.
Then, in Examples D10 to D25 and Comparative Examples D26 to D30, the corrugated cardboard materials for measuring the magnification of the intervals shown in Tables 16, 17, and 18 below were used.
In each of Examples D10 to D25 and Comparative Examples D26 to D30, the "magnification of the interval" was adjusted by appropriately selecting the following processing conditions for folding processing, the type and grade of the base paper, the flute, and the like.
In each of Examples D10 to D25 and Comparative Examples D26 to D30, the processing conditions are the conditions of the work in which the operator manually puts a ruled line on the cardboard web and folds it into a bellows fold, and the type of the ruled line jig and the ruled line. Including the depth of.

The ruled line jig is a pushing tool for denting a ruled line forming a crease with the measuring cardboard material.
There are a plurality of "types" of ruled line jigs in which the shape of the portion where the cardboard is pushed is different. The way the cardboard bends along the ruled line differs depending on the shape (type) of the ruled line jig.
The "width dimension" of the ruled line jig is an interval dimension separated in the second direction by the ruled line, and there are a plurality of width dimension ruled line jigs for each shape of the ruled line jig.
The "depth" of the ruled line expresses how much the liner forming the front or back surface of the cardboard is pushed in when the ruled line is recessed in the cardboard with the ruled line jig, as a ratio [%] to the total thickness of the cardboard. The value.

In Examples D10 to D25 and Comparative Examples D26 to D30, any one of the following three types is formed by using a ruled line jig having any one of the following three width dimensions, and each ruled line is formed. It was adjusted to the "depth" of any one of the following three ways.
-Shape: R ruled line (Examples D10 to D25, Comparative examples D26 to D30)
Width dimension: 3 [mm] (Examples D10 to D23, Comparative Examples D26, D28 to D30)
1.4 [mm] (Examples D24 and D25, Comparative Example D27)
Depth: 65 [%] (Examples D10, D13 to D25, Comparative Examples D28 to D30)
55 [%] (Example D11)
50 [%] (Example D12)
80 [%] (Comparative Example D26)
30 [%] (Comparative Example D27)

--Evaluation--
The uprightness A, uprightness B, box-making stability and feedability were evaluated with respect to the measured corrugated cardboard materials of Examples D10 to D25 and Comparative Examples D26 to D30.
Here, "uprightness A" and "uprightness B" are the same as the "uprightness" evaluated in Examples D1 to D3 and Comparative Examples D4 and D5 described above, when an impact is applied to the measured corrugated cardboard material. It is an evaluation standard that corresponds to the quality of formability and stability.
The "uprightness A" is evaluated based on the same evaluation method as the above-mentioned "uprightness", that is, the "deviation distance" measured in the above-mentioned procedures Xa to Xd.

On the other hand, "uprightness B" is the same as "uprightness A" in that it is evaluated based on the deviation obtained in the collision test, but the procedure for measuring the deviation distance is the above-mentioned procedure Xa ~. Partly different from Xd. Specifically, as shown in the following procedures Xa'to Xd', the procedures Xa'and Xc'in the procedures Xa'to Xd' are different from the procedures Xa and Xc in the above-mentioned procedures Xa to Xd. ing.
-Procedure Xa': All stages of the corrugated cardboard material to be measured are measured.
-Procedure Xb': A reference line is drawn with a marker on the corrugated cardboard material to be measured in procedure Xa'.
Ku. This reference line is drawn on the extending surface of the fold perpendicular to the ground.
-Procedure Xc': The central part of the step height of the corrugated cardboard material to be measured in procedure Xa'
Conduct a collision test as a collision point. After that, from the reference line to the CD direction
Measure the distance to separate. The "collision point" here is the following collision category.
It is set to fit in the enclosure.
・ Collision range: 100 each up and down from the center of the step height (half position in the height direction)
mm], 1 from the lateral end to the lateral center
Range from 0 [mm] to 650 [mm].
-Procedure Xd': The maximum value of the procedure Xc'is set as the deviation distance.

"Box-making stability" is an evaluation standard that corresponds to the processing stability in various processes such as the feed process, cutting process, and fold process in the box-making system, and the quality of the boxes manufactured by the box-making system. is there.
For box-making stability, the measurement cardboard material subjected to the impact test for evaluating each of the above-mentioned uprightness A and uprightness B was applied to the following box-making system, and the following manufacturing conditions (box-making speed and box-making speed and box-making stability) were applied. The evaluation was made based on the box-making property when the box was manufactured according to the box size), the quality of the manufactured box, and the presence or absence of the stop (also referred to as "machine stop") of the box-making system.
Box making system: CMC, product name "CMC Carton Wrap 1000"
Box making speed: 500 [box per hour]
Box dimensions: Vertical 230 [mm]
: Horizontal 355 [mm]
: Height 145 [mm]

The “feed property (feed property 1)” is an evaluation standard corresponding to the quality of paper feed stability in the box-making system similar to the feed property 1 described above with respect to Examples A10 to A25 and Comparative Examples A26 to A28.
Similar to the evaluation of the feedability 1 described above, the feedability 1 is measured when the measurement cardboard material is applied to the following box-making system and the box is manufactured under the following manufacturing conditions (box-making speed). The evaluation was made based on whether or not the sheet was smoothly fed out from the material and whether or not the box-making system was stopped (also referred to as "machine stop").
Box making system: CMC, product name "CMC Carton Wrap 1000"
Box making speed: 500 [box per hour]
It was visually confirmed whether or not the above sheet was properly extended and whether or not the machine was stopped.

Uprightness A and uprightness B were evaluated with respect to Examples D1 to D3 and Comparative Examples D4 and D5 according to the same criteria as the above-mentioned "uprightness".
Box-making stability was evaluated according to the following criteria.
・ ◎: Box can be made without any problem, and there is no fold other than crease F.
・ ○: Box can be made without any problem, but there are folds other than crease F.
・ △: Boxing is not possible, but the machine does not stop.
・ ×: Machine stop occurs.
In the examples and comparative examples relating to the configuration D', "Δ" or more were evaluated as good in terms of uprightness A, uprightness B, and box-making stability.

The feedability 1 was evaluated with respect to Examples A10 to A25 and Comparative Examples A26 to A28 according to the following criteria similar to the feedability 1 described above.
・ ◎: Only 1 [sheet] can be held when feeding out the sheet from the measurement cardboard material.
No folds other than the creases of the bellows folds have occurred.
・ ○: 1 [sheet] sheet and subsequent sheet when feeding out the sheet from the measurement cardboard material
An event occurs in which two [sheets] of the sheet are lifted at the same time, but a snake
No folds other than the belly folds occur, and no machine stop occurs.
・ △: 1 [sheet] sheet and subsequent sheet when feeding out the sheet from the measured corrugated cardboard material
Two [sheets] of the sheet are lifted at the same time, and after the bellows fold fold
The outside breaks, but the machine does not stop.
・ ×: 1 [sheet] sheet and subsequent sheet when feeding out the sheet from the measurement cardboard material
Two [sheets] of the sheet are lifted at the same time, and after the bellows fold fold
An outer fold occurs, and the machine stops due to the fold that occurs.
In the above, "when the sheet is unwound from the measured corrugated cardboard material" is when the rotating body (reference numeral 41 in FIG. 9) provided in the box making system rotates 120 [°] and the measured corrugated cardboard material is conveyed by a predetermined amount. Is.
In the examples and comparative examples relating to the configuration D', "○" or more was regarded as a good evaluation for the feedability 1.

The vertical dimension is 850 [mm] or more and 2500 [mm] or less, the horizontal dimension is 900 [mm] or more and 2500 [mm] or less, and the height dimension is 700 [mm] or more. In Examples D10 to D25 having a magnification of 2000 [mm] or less and an interval magnification of 1.0 [times] or more and less than 3.4 [times], both uprightness A and B are good. An evaluation was obtained, and a good evaluation was also obtained in the box-making stability.
Among them, the single flute has a vertical dimension of 1000 [mm] or more and 2500 [mm] or less, and a horizontal dimension of 1100 [mm] or more and 2500 [mm] or less, and is high. In Examples D12 to D15, the dimensions are 1300 [mm] or more and 2000 [mm] or less, and the magnification of the interval is 1.5 [times] or more and less than 3.0 [times]. , Both the uprightness A and B were excellently evaluated, and the box-making stability was also excellently evaluated as "◎".
Further, among Examples D10 to D25, in Example D25 having a vertical dimension of less than 1000 [mm], a horizontal dimension of less than 1100 [mm], and a height dimension of less than 1300 [mm], uprightness is achieved. All of the evaluations of A, B and box-making stability were inferior to the others, and the evaluation "Δ" was obtained.

On the other hand, in Comparative Example D26 containing a magnification of an interval of less than 1.0 [times] and Comparative Example D27 containing a magnification of an interval of 3.4 [times] or more, both the uprightness A and B and the box-making stability were both. A bad evaluation "x" was obtained. In Comparative Example D28 having a horizontal dimension of less than 850 [mm] and Comparative Example D29 having a vertical dimension of less than 900 [mm] and Comparative Example D30 having a height dimension of less than 700 [mm], uprightness A and B A poor evaluation was obtained for all of the above, and a poor evaluation was also obtained for the box-making stability.

From the evaluation results of Examples D10 to D25 and Comparative Examples D26 to D30, the vertical dimension is 850 [mm] or more and 2500 [mm] or less, and the horizontal dimension is 900 [mm] or more and 2500 [mm]. Measurements in the range of 700 [mm] or more and 2000 [mm] or less, and the interval magnification of 1.0 [times] or more and less than 3.4 [times]. According to the cardboard material, it can be seen that the deviation distance due to the collision is suppressed and the uprightness A and B are ensured. Further, it can be seen that the box-making stability in the box-making using the corrugated cardboard material in which the uprightness A and B are ensured is also ensured. Furthermore, since both the uprightness A and B are equally well evaluated, it is presumed that the uprightness can be evaluated regardless of the evaluation method.

Further, among Examples D10 to D25, Examples D13 to D16 having the same size and interval magnification as those of Example D1 but different types of flutes, and the basis weight or type of liner base paper and core base paper. From the evaluation results of Examples D17 to D20, it is inferred that the specifications such as the type of flute, the liner base paper, and the basis weight and type of the core base paper do not affect the evaluation of uprightness and box-making stability. ..

Further, in Examples D10 to D25, good evaluations were obtained not only for uprightness A and B and box-making stability but also for feedability 1.
Among them, Examples D10, D13, D14, D16, D18, D19, D21 to which the maximum value of the magnification of the interval is 2.3 [times] or more and the minimum value is 2.0 [times] or more. In D24, a good evaluation was obtained with a feedability of 1.
On the other hand, in Examples D11, D12, D15, D17, and D20 in which the maximum value of the interval magnification is less than 2.3 [times] or the minimum value is less than 2.0 [times], the feedability 1 is evaluated. It was a little inferior. Further, although the maximum value of the magnification of the interval is 2.3 [times] or more and the minimum value is 2.0 [times] or more, the vertical dimension is 900 [mm] and the horizontal dimension is 1000 [mm]. ], And in Example D25 having a height dimension of 1200, the evaluation of feedability was slightly inferior.

In view of Examples D11, D12, D15, D17, D20, and D25, from Examples D10 to D24, the one in which the magnification of the interval is larger than 2.0 [times] (ideal value) is a good evaluation in feedability 1. Can be said to be obtained.
If the maximum value of the interval magnification is less than 2.3 [times] or the minimum value is less than 2.0 [times], the stacked sheets will come into contact with each other too much and there will be less air between them. Since it becomes difficult for the sheets to separate from each other, an event occurs in which two [sheets] are lifted at the same time, and it is presumed that the feedability 1 is slightly inferior.

That is, when the magnification of the interval is small, the inflow of air from that location is small, the sheets are more likely to stick to each other through the folds, and there is a tendency for two [sheets] to be lifted at the same time when the sheets are fed out. .. On the other hand, if the porosity is large, the inflow of air from that location is large, and the sheets tend to separate from each other through the folds, and the sheets tend to be unwound one by one when the sheets are unwound.
Further, it is presumed that the smaller the size of the measured corrugated cardboard material, the more difficult it is to stabilize the posture of the sheet when the sheet is fed out, and the more difficult it is to secure the feedability 1.

<Structure E>
--Measurement target--
In Examples E1 to E3 and Comparative Examples E4 and E5 regarding the configuration E, the crossing angles of the edges of the sheets in the stationary measurement cardboard material were compared. Specifically, one of the 101 [stages] in the middle stage of the corrugated cardboard material to be measured was measured in the vertical direction (CD direction). That is, the middle section where the sheets are adjacent to each other at 100 [locations] in the height direction was measured.

As described above, the “intersection angle” as used herein refers to the edge of one of the sheets that are continuous through the fold (“first edge E ₁ ” as in one embodiment. ”) And the edge of the other sheet (referred to as“ second edge E ₂ ”as in one embodiment).
This crossing angle was measured by the following procedures Ea to Ee.
-Procedure Ea: When the measurement cardboard material is viewed from the height direction (TD direction), the first end edge E ₁ and the first
Use a ruler to determine the maximum value of the distance that the two-end edge E _{2 is} displaced in the vertical direction (CD direction).
Measure.
-Procedure Eb: The measurement cardboard material has edges E ₁ and E ₂ when viewed from the height direction (TD direction).
Define a virtual triangle. Specifically, the first end edge E ₁ and the second end edge E ₂
Opposite side corresponding to the maximum value of the distance between and in the vertical direction (CD direction)
A triangle having a so-called deviation distance) and an adjacent side corresponding to the lateral dimension of the sheet.
Think of the shape as a right triangle.
-Procedure Ec: The horizontal dimension of the measured corrugated cardboard material (here, 1150 [mm]) and procedure Ea
Intersect using the three-square theorem and trigonometric functions from the measured length of the opposite side
Calculate the angle.
-Procedure Ed: From the intersection angle measured in the procedure Ec, in the same manner as the above-mentioned procedures Bd and Ce,
Exclude numerical values that may cause disturbances (factors) that reduce the accuracy of measurement results.
-Procedure Ee: The crossing angle is the maximum value in the numerical value excluding some measurement results in the procedure Ed.
And.

To give an example of procedure Ec, when the length of the opposite side is 5.4 [mm], the length of the adjacent side is 1150 [mm], so the calculated intersection angle is 0.27 [°]. ].
In the "exclusion of numerical values that can cause disturbance" in the procedure Ed, as in the above procedure Bd and Ce, when the crossing angles measured at all stages of the measured corrugated cardboard material are used as the population, the population is used. Values whose standard deviation deviates from ± 3σ are excluded.
Then, in Examples E1 to E3 and Comparative Examples E4 and E5, the corrugated cardboard material for measuring the crossing angle shown in Table 19 below was used.

--Evaluation--
The paper feed stability was evaluated for the measured corrugated cardboard materials of Examples E1 to E3 and Comparative Examples E4 and E5.
The "paper feed stability" referred to here is a standard corresponding to the quality of the feeding stability of the measured corrugated cardboard material in the feed process of the box making system.
For paper feed stability, 100 sheets of measured corrugated cardboard are applied to CMC's carton wrap 1000 (box making system) under the following box-making speed conditions, and the sheets of measured corrugated cardboard are fed in the feed process. The number of machine stops due to clogging was counted and evaluated.
・ Box making speed: 500 [box per hour]

The above paper feed stability was evaluated according to the following criteria.
-⊚: The number of stops is 0 [times].
-○: The number of stops is 1 [times].
-Δ: The number of stops is 2 to 3 [times].
-X: The number of stops is 4 [times] or more.

In Examples E1 to E3 in which the crossing angle was less than 0.30 [°], good evaluation of paper feed stability was obtained. Among them, in Example E1 having an intersection angle of 0.05 [°] or less, an excellent evaluation of paper feed stability was obtained.
On the other hand, in Comparative Examples E4 and E5 having an intersection angle of 0.30 [°] or more, an evaluation of poor paper feed stability was obtained.
From the evaluation results of Examples E1 to E3 and Comparative Examples E4 and E5, according to the measured corrugated cardboard material having an intersection angle of less than 0.30 [°], the machine stop due to the sheet clogging of the box making system is suppressed, and the paper is fed. It can be seen that stability is ensured.

<Structure E'>
--Measurement target--
In Examples and Comparative Examples with respect to the configuration E', the crossing angles of the edges of the sheets in the stationary measurement cardboard material were compared with respect to Examples E10 to E26 and Comparative Examples E27 to E31.
Of the Examples E10 to E26 and Comparative Examples E27 to E31, in each of the measured corrugated cardboard materials of Examples E10 to E15 and Comparative Examples E27 to E29, the flute, the basis weight, and the dimensions are each described in Examples E1 to E3. And the measurement cardboard materials of Comparative Examples E4 and E5 are the same. In the measured corrugated cardboard materials of Examples E16 to E26 and Comparative Examples E30 and E31, at least one of the flute, the basis weight, and the dimensions is the measured corrugated cardboard of Examples E1 to E3 and Comparative Examples E4 and E5 described above. Different from wood.

Specifically, in each of the measurement cardboard materials of Examples E10 to E26 and Comparative Examples E27 to E31, any one of the following three types of flutes was adopted.
-A flute (single flute): Examples E10 to E15, E18 to E26, comparison
Example E27-E29
-E flute (single flute): Example E16, Comparative Example E30
-AB flute (double flute): Example E17, Comparative Example E31

The measurement cardboard material of each flute used in each of Examples E10 to E26 and Comparative Examples E27 to E31 was produced by using a corrugator having a stepped roll of the specifications shown below.
> A flute ・ Step height: 4.5 [mm]
・ Number of steps: 34 [mountain / 30 cm]
> E flute ・ Step height: 1.1 [mm]
・ Number of steps: 85 [mountain / 30 cm]
＞ AB Flute ――A Flute――
・ Step height: 4.5 [mm]
・ Number of steps: 34 [mountain / 30 cm]
--B flute--
・ Step height: 2.5 [mm]
・ Number of steps: 50 [mountain / 30 cm]

Of the above three types of flutes, the single flute forming the A flute and the E flute is composed of three base papers (materials) corresponding to each of one core and two liners. The double flute that forms the AB flute is composed of five base papers (materials) corresponding to each of the three cores and the two liners.
In Examples E10 to E26 and Comparative Examples E27 to E31, any one of the following eight types of base paper was used for each of the base papers forming the core or liner constituting the respective measurement cardboard materials.

・ No. 1: Product name "OFK EM170", manufactured by Oji Materia Co., Ltd.,
Basis weight 170 [g / m ² ]
・ No. 2: Product name "OFC EM170", manufactured by Oji Materia Co., Ltd.,
Basis weight 170 [g / m ² ]
・ No. 3: Product name "OFLC EM100", manufactured by Oji Materia Co., Ltd.,
Basis weight 100 [g / m ² ]
・ No. 4: Product name "OFK EM210", manufactured by Oji Materia Co., Ltd.,
Basis weight 210 [g / m ² ]
・ No. 5: Product name "OFK EM280", manufactured by Oji Materia Co., Ltd.,
Basis weight 280 [g / m ² ]
・ No. 6: Product name "OND EM160", manufactured by Oji Materia Co., Ltd.,
Basis weight 160 [g / m ² ]
・ No. 7: Product name "OFLD EM100", manufactured by Oji Materia Co., Ltd.,
Basis weight 100 [g / m ² ]
・ No. 8: Product name "OND EM200", manufactured by Oji Materia Co., Ltd.,
Basis weight 200 [g / m ² ]

Specifically, in each of the measurement cardboard materials of Examples E10 to E27 and Comparative Examples E28 to E32, the base paper forming the liner and the base paper forming the core in the following combinations were used in the following combinations.
(Liner base paper) No. 1, (Core base paper) No. 6: Examples E10 to E17, E22 to
E25, Comparative Examples E27-E31
(Liner base paper) No. 2, (Core base paper) No. 6: Example E18
(Liner base paper) No. 3, (Core base paper) No. 7: Example E19
(Liner base paper) No. 4, (Core base paper) No. 6: Example E20
(Liner base paper) No. 5, (Core base paper) No. 8: Examples E21, E26

No. 1, No. 4, No. For each of the 5 liner base papers, a base paper having a grade of K liner (craft liner) is used. No. 2, No. For each of the 3 liner base papers, a base paper having a grade of C liner (jute liner) is used. The grades are divided according to the amount of pulp compounded, and the K liner is generally harder than the C liner.

In each of the measured corrugated cardboard materials of Examples E10 to E26 and Comparative Examples E27 to E31, one of the five sizes 1 to 5 shown below was adopted.
・ Size 1: Vertical dimension 1300 [mm],
Horizontal dimension 1150 [mm],
Height dimension 1800 [mm]
・ Size 2: Vertical dimension 1300 [mm],
Horizontal dimension 1000 [mm],
Height dimension 1800 [mm]
・ Size 3: Vertical dimension 400 [mm],
Horizontal dimension 1150 [mm],
Height dimension 1800 [mm]
・ Size 4: Vertical dimension 1300 [mm],
Horizontal dimension 1150 [mm],
Height dimension 2200 [mm]
・ Size 5: Vertical dimension 400 [mm],
Horizontal dimension 1000 [mm],
Height dimension 2200 [mm]

Specifically, size 1 was adopted for the measurement cardboard materials of Examples E10 to E21 and Comparative Examples E27 to E31. Size 2 was adopted as the measurement cardboard material of Example E22. Size 3 was adopted as the measurement cardboard material of Example E23. Size 4 was adopted as the measurement cardboard material of Example E24. Size 5 was adopted as the measurement cardboard material of Examples E25 and E26.

Then, in Examples E10 to E26 and Comparative Examples E27 to E31, the corrugated cardboard materials for measuring the crossing angle shown in Tables 20 to 22 below were used. The crossing angle was the same as the crossing angle described above in the configuration E, and was measured by the same procedure as the above steps Ea to Ee.
For the intersection angles of Examples E10 to E26 and Comparative Examples E27 to E31, the type of the ruled line jig and the depth of the ruled line are appropriately selected, and the type, grade, flute, etc. of the base paper are appropriately set. It was adjusted.

The ruled line jig is a pushing tool for denting a ruled line forming a crease with the measuring cardboard material.
There are a plurality of "types" of ruled line jigs in which the shape of the portion where the cardboard is pushed is different. The way the cardboard bends along the ruled line differs depending on the shape (type) of the ruled line jig.
The "depth" of the ruled line expresses how much the liner forming the front or back surface of the cardboard is pushed in when the ruled line is recessed in the cardboard with the ruled line jig, as a ratio [%] to the total thickness of the cardboard. The value.

Specifically, in each of the measurement cardboard materials of Examples E10 to E26 and Comparative Examples E27 to E31, a ruled line is formed by using a ruled line jig having the following shape, and each ruled line is one of the following three types. Adjusted to one "depth".
-Shape: R ruled line (Examples E10 to E26, Comparative examples E27 to E31)
Depth: 70 [%] (Examples E10 to E26, Comparative Example E27)
50 [%] (Comparative Example E28)
30 [%] (Comparative Examples E29 to E31)

--Evaluation--
The paper feed stability was evaluated with respect to the measured corrugated cardboard materials of Examples E10 to E26 and Comparative Examples E27 to E31. "Paper feeding stability" is a criterion corresponding to the quality of the feeding stability of the measured corrugated cardboard material in the feeding process of the box making system, which is the same as described above in Examples E1 to E3 and Comparative Examples E4 and E5 relating to the configuration E. Yes, it was evaluated based on the same criteria as above.

In addition, the transportability of each of the measured corrugated cardboard materials of Examples E10 to E26 and Comparative Examples E27 to E31 was evaluated.
This transportability is similar to the transportability of Examples B10 to B30 and Comparative Examples B31 to B36 described above, such as the stability of the measured corrugated cardboard material when the measured corrugated cardboard material is transported by a forklift or the like, and the stability at the creases. It is an evaluation standard that corresponds to the resistance to tearing.

The transportability was determined according to the following procedures E1 to E4 similar to the above procedures C1 to C4 and procedures B1 to B4.
-Procedure E1: The measurement cardboard material is placed on the pallet, and the measurement data is placed on the pallet.
Wrap with stretch film so that the ball material is fixed. Strike
For the retched film, the ratios of Examples B1 to B3 and the ratio according to the above configuration B
A strain of the same product and size as the evaluation of film tear in Comparative Examples B4 and B5
Chifilm was used.
-Procedure E2: The measurement corrugated cardboard material packaged in procedure E1 is subjected to the following temperature and humidity conditions for 24 [hours].
]put.
> Temperature and humidity conditions: temperature 23 [° C], humidity 50 [% Rh]

-Procedure E3: After step E2, use the following vibrator to measure the corrugated cardboard material under the following conditions.
Perform a shocking test.
> Vibration machine: Made by IMV Corporation, product name "multi-axis vibration test device", product number "DS-3"
000-15L "
> Excitation force: 30 [kN]
＞ Vibration method: Random wave
> Frequency: 100 [Hz]
> Temperature and humidity conditions: temperature 23 [° C], humidity 50 [% Rh]
-Procedure E4: After step E3, visually check the stability of the measured corrugated cardboard material and the state of the creases.
did.

The above transportability was evaluated according to the following criteria.
・ ◎: There is no change in the measured corrugated cardboard material before and after the test.
・ ○: After the test, the outer liner is torn at the crease (only the surface layer of the liner is torn).
There is no cutting in the ina).
・ △: After the test, the outer liner tears at the crease (the liner is cut and the tear occurs.
The core can be visually confirmed from the grid).
・ ×: After the test, the outer liner is torn at the crease, and the crease is crushed or
, The measurement cardboard material collapses.

In Examples E10 to E26 having an intersection angle of less than 0.30 [°], at least a good evaluation of paper feed stability was obtained. Among them, in Examples E10, E11, E14, and E15 having an intersection angle of 0.13 [°] or less, excellent evaluation of paper feed stability was obtained.
On the other hand, in Comparative Examples E27 to E31 having an intersection angle of 0.30 [°] or more, an evaluation of poor paper feed stability was obtained.
From the evaluation results of Examples E10 to E26 and Comparative Examples E27 to E31, according to the measured corrugated cardboard material having an intersection angle of less than 0.30 [°], the machine stop due to the sheet clogging of the box making system is suppressed, and the paper is fed. It can be seen that stability is ensured.

When the measurement cardboard material (continuous corrugated cardboard) has an crossing angle (sheet misalignment), it is difficult for the worker to manually correct the sheet misalignment because the continuous sheet is folded in a bellows shape. There is a problem. On the other hand, when the crossing angle is generated in the packing form in which a plurality of single-wafered cardboard materials are stacked, the single-leaf corrugated cardboard material (sheet) is separated for each sheet, so that the worker manually works. It is easy to correct the deviation.
Due to the problems peculiar to continuous corrugated cardboard as described above, when applying continuous corrugated cardboard to a box making system (automatic packaging system), it is important that the crossing angle is less than 0.30 [°] (predetermined range). .. That is, it can be said that the crossing angle is a physical property peculiar to continuous cardboard.

Of Examples E10 to E26, at least the paper feed stability of Examples E16 to E26 in which the basis weight and grade of the base paper used for the flute, the liner, and the core, or the size of the measured corrugated cardboard material is different from those of Examples E10 to E15. Since the evaluation of "○" or higher was obtained, the difference in the basis weight and grade of the base paper used for the flute, liner and core, or the size of the measured corrugated cardboard material does not affect the evaluation of paper feed stability. It is presumed to be.

Generally, the package size of the measured corrugated cardboard material is 2500 [mm] or less in the vertical direction, 2500 [mm] or less in the horizontal direction, and 2000 [mm] or less in the height direction. is there.
Among Examples E10 to E26, from Examples E22 to E26 having different packaging dimensions, the vertical dimension is 350 [mm] or more and 2500 [mm] or less, and the horizontal dimension is 900 [mm]. If the above is 2500 [mm] or less, and the dimension in the height direction is 1000 [mm] or more and 2200 [mm] or less, the difference in packing size does not affect the paper feed stability. Inferred.

In Examples E10 to E26 in which the crossing angle is less than 0.30 [°], an evaluation of “◯” or more is obtained in both evaluations of paper feed stability and transportability.
Further, among Examples E10 to E26, Examples E10 to E13, E16 to E19, and E22 having an intersection angle of 0.04 [°] or more were evaluated as “⊚” in terms of transportability.
On the other hand, among Examples E10 to E26, in Examples E14 and E15 in which the crossing angle is smaller than 0.04 [°], although the paper feed stability is evaluated as “◎”, the transportability is evaluated. Was "○".
Among Examples E10 to E26, in Examples E20, E21, and E26 in which the crossing angle is 0.04 [°] or more, but the basis weight of the base paper used for the liner is 200 [g / m ² ] or more, the transportability is high. The evaluation was "○".
Among Examples E10 to E26, Examples E23, E25, E26 having an intersection angle of 0.04 [°] or more but having a vertical dimension of 400 [mm] and a height dimension of 2200 [mm] In Examples E24 to E26 of the above, the evaluation of transportability was "○".
Further, among Comparative Examples 27 to 31, Comparative Example E27 having an intersection angle of less than 0.40 [°] was evaluated as “○” in terms of transportability, but a comparison with an intersection angle of 0.40 [°] or more. In Examples E28 to E31, the transportability was evaluated as “Δ” or less.

From Examples E10 to E26, it can be said that if the crossing angle is less than 0.30 [°], not only paper feed stability but also transportability can be ensured.
Further, in view of Examples E14 and E15, when the crossing angle from Examples E10 to E13, E16 to E19 and E22 is 0.04 [°] or more, it can be said that the transportability is excellent.

When the intersection angle is 0.04 [°] or more, a range of motion 30 (see FIG. 6) is generated between the ruled line Cr and the actual crease F. Even if vibration is applied during the transportation of the corrugated cardboard material, it is presumed that the range of motion 30 can release the stress of vibration and prevent the folds from being damaged.
When the crossing angle is smaller than 0.04 [°], the box-making property is excellent, but the range of motion 30 is hardly generated between the ruled line Cr and the actual crease F, so that during the transportation of the measured corrugated cardboard material. It is presumed that when vibration is applied, it becomes difficult for the stress of vibration to escape, and the creases are likely to be damaged.
If the intersection angle is 0.40 [°] or more, the area between the ruled line Cr and the actual crease F is too large to function as a range of motion, and the stress of vibration is concentrated on one crease. , It is presumed that the creases are likely to be damaged.

In addition, even if the crossing angle is 0.04 [°] or more and less than 0.40 [°], if the basis weight of the base paper is 200 [g / m ² ] or more, the liner becomes hard and creases. Tends to be prone to damage.
Even if the intersection angle is 0.04 [°] or more and less than 0.40 [°], if the package size of the measured corrugated cardboard material deviates from the predetermined range (specifically, the vertical dimension is 400). If it is [mm] or less, or if the dimension in the height direction is 2200 [mm] or more), it tends to shake during transportation of the measured corrugated cardboard material, which tends to cause breakage of the fold.
In general, an ideal shape with an intersection angle of 0 [°] seems to be preferable, but when transporting bellows-folded measurement cardboard material (continuous cardboard), the intersection angle is for the above reasons. Those who have generated can use continuous cardboard more efficiently.

Measurement of corrugated cardboard with continuous strips folded in a bellows When transporting corrugated cardboard material (continuous corrugated cardboard), the continuous sheets are connected by bellows folds, so they are susceptible to impact during transportation, and the creases caused by bellows folds are the starting point. There is a problem that corrugated cardboard tends to be cracked.
On the other hand, since the single-wafered corrugated cardboard materials are independent one by one, no rule cracking occurs when a plurality of single-wafered corrugated cardboard materials are transported in a stacked package.
In this case, it can be said that improving the rule cracking by adjusting the intersection angle within a predetermined range is an effect peculiar to continuous corrugated cardboard.

[3. Example of combining the three configurations]
<Example ABC>
An example ABC in which configurations A, B and C are combined will be described.
The details of the measurement target and evaluation of Example ABC are the same as those described above unless otherwise specified.
--Measurement target--
Example ABC was evaluated for the measurement corrugated cardboard material having the parameters listed below.
・ Vacancy rate: 0 [%]
・ End face deviation: 10 [mm]
-Thickness magnification: maximum 1.9 [times], minimum 1.8 [times]

--Evaluation--
Measurement of Example ABC The corrugated cardboard material was evaluated for box-making property, film tearing, and transportability. As a result, excellent evaluation (“◎” mentioned above) was obtained in all of box-making property, film tearing and transportability.
From the evaluation results of Example ABC, it can be seen that when the configurations A, B, and C are combined, the evaluations corresponding to the respective configurations A, B, and C are not impaired and are excellent.
Furthermore, it is presumed that the quality of the measured corrugated cardboard material is stable because of its excellent box-making property, film tearing and transportability. As a result, it is presumed that the dimensions of the assembled box are less likely to vary from the designed dimensions, and the dimensional stability of the box is improved. Furthermore, it is presumed that the ground contact area of the measured corrugated cardboard material is secured because there is no gap due to tri-folding and no vertical or horizontal deviation, and the frictional resistance increases, so that the deviation distance decreases.

<Example BCD>
Example BCD in which configurations B, C and D are combined will be described.
The details of the measurement target and evaluation of Example BCD are the same as those described above unless otherwise specified.
--Measurement target--
Example BCD was evaluated for the measured corrugated cardboard material having the parameters listed below.
・ End face deviation: 10 [mm]
-Thickness magnification: maximum 1.9 [times], minimum 1.8 [times]
-Interval magnification: maximum 2.0 [times], minimum 1.8 [times]

--Evaluation--
Measurement of Example BCD The tearing, transportability, and uprightness of the film were evaluated for the corrugated cardboard material. As a result, excellent evaluation (“◎” mentioned above) was obtained in all of the film tearing, transportability and uprightness.
From the evaluation results of Example BCD, it can be seen that when the configurations B, C, and D are combined, the evaluations corresponding to the respective configurations B, C, and D are not impaired and are excellent.
Furthermore, it is presumed that the quality of the measured corrugated cardboard material is stable because the film is torn, and the transportability and uprightness are excellent. As a result, it is presumed that the dimensions of the assembled box are less likely to vary from the designed dimensions, and the dimensional stability of the box is improved. Furthermore, it is presumed that the box size will be stable with the minimum number of ruled lines by adjusting the ruled line spacing.

Further, the cut workability of the measured corrugated cardboard material of Example BCD was evaluated.
This cut workability is an evaluation standard corresponding to the quality of workability in the cut process in the semi-automatic system (box making system).
Specifically, the cut workability was evaluated as to whether or not the sheet was separated when the following measurement sheet pieces were cut by the following semi-automatic system.
・ Semi-automatic system: Product name “PAQEQU C-250”, manufactured by HOMAG ・ Measurement sheet piece: Horizontal dimension 1.0 [m], measurement Cardboard material to bellows fold
Cut out so as to straddle the crease. At that time, the thickness magnification is 1.9.
It is [times], the magnification of the interval is 2.0 [times], and the intersection angle
Measurement cardboard material CDEi with a degree of 0.05 [°] and thickness
The magnification is 1.8 [times], and the interval magnification is 1.8 [times].
And the measurement cardboard material with an intersection angle of 0.05 [°]
We prepared 2 [sheets] of CDEii.

The evaluation of cut workability was carried out by the following procedures BCDa to BCCc.
-Procedure BCDa: The receiving roller of the cutting blade provided in the above semi-automatic system is made of rubber.
Change from made to metal. Measurement with a semi-automatic system Carrying cardboard materials
In the transmission path, it is possible to rotate around the rotation axis along the width direction of the measurement cardboard material.
A pair of upper and lower rollers are provided, and the upper roller is the cutting blade.
The lower roller forms the receiving roller.

-Procedure BCDb: Work the above measurement sheet piece from the measurement cardboard material of Example BCD.
The person cut out using a cutter, and the cut out measurement sheet piece was cut out as described above.
The above semi-automatic system in which the receiving roller was changed to metal in the procedure BCDa
Set in the system.
-Procedure BCDc: The measurement sheet piece set in the described procedure BCDb has the following shape and size.
Cut into pieces. The cut speed of the semi-automatic system is as follows
Set.
-Shape: Pattern in which the A-type cardboard box is unfolded-Size: Width dimension of the side plate of the A-type cardboard box 356 [mm],
Width dimension of the end plate of the A type cardboard box 159 [mm],
Height dimension of A type cardboard box 256 [mm]
・ Speed: 40 [m / min]
-Processed number: 2 [sheets]

The measurement sheet pieces processed according to the above procedures BCDa to BCCc were evaluated according to the following criteria.
・ ◎: The sheet can be easily separated by hand at all cut points.
・ ○: Some parts of the folds are not cut, but they can be separated by hand relatively easily.
It is possible to squeeze, and there is little roughness or fluffing on the cut end face.
・ △: There is a part of the bent part that is not cut, so it can be easily separated by hand.
It is possible, but when it is separated by hand, the cut end face becomes rough and fluffy.
・ ×: There is a part of the bent part that is not cut, and if you try to separate it by hand
Damage such as the core peeling from the liner occurs.

The measurement cardboard material of Example BCD was evaluated as excellent in cut workability (“⊚” above).
From the above evaluation results, it can be said that the measurement corrugated cardboard material in which the configurations B, C, and D are combined has a particularly remarkable effect that the cut workability is excellent when applied to the semi-automatic system.
The result of this evaluation is that by adjusting each of the end face deviation, thickness magnification, and interval magnification within the specified range, the ruled line (crease) due to bellows folding is not extremely crushed, and the cutting blade is cut by a semi-automatic system. Is considered to have sufficiently penetrated the thickness of the measurement sheet piece, and good cutability was exhibited.

<Example CDE>
Example CDE in which configurations C, D and E are combined will be described.
The details of the measurement target and evaluation of Example CDE are the same as those described above unless otherwise specified.
--Measurement target--
Example CDE was evaluated for the measured corrugated cardboard material having the parameters listed below.
-Thickness magnification: maximum 1.9 [times], minimum 1.8 [times]
-Interval magnification: maximum 2.0 [times], minimum 1.8 [times]
・ Crossing angle: 0.05 [°]

--Evaluation--
Measurement of Example CDE The corrugated cardboard material was evaluated for transportability, uprightness, and paper feed stability. As a result, excellent evaluation (“◎” mentioned above) was obtained in all of transportability, uprightness, and paper feed stability.
From the evaluation results of Example CDE, it can be seen that when the configurations C, D, and E are combined, the evaluations corresponding to the respective configurations C, D, and E are not impaired and are excellent.
Furthermore, it is presumed that the quality of the measured corrugated cardboard material is stable because of its excellent transportability, uprightness, and paper feed stability. As a result, it is presumed that the dimensions of the assembled box are less likely to vary from the designed dimensions, and the dimensional stability of the box is improved.

Further, the cut workability of the measured corrugated cardboard material of Example CDE was evaluated.
This cut workability is an evaluation standard corresponding to the quality of workability in the cut process in the semi-automatic system (box making system).
Specifically, the cut workability was evaluated as to whether or not the sheet was separated when the following measurement sheet pieces were cut by the following semi-automatic system.
・ Semi-automatic system: Product name “PAQEQU C-250”, manufactured by HOMAG ・ Measurement sheet piece: Horizontal dimension 1.0 [m], measurement Cardboard material to bellows fold
Cut out so as to straddle the crease. At that time, the thickness magnification is 1.9.
It is [times], the magnification of the interval is 2.0 [times], and the intersection angle
Measurement cardboard material CDEi with a degree of 0.05 [°] and thickness
The magnification is 1.8 [times], and the interval magnification is 1.8 [times].
And the measurement cardboard material with an intersection angle of 0.05 [°]
We prepared 2 [sheets] of CDEii.

The evaluation of cut workability was carried out by the following procedures CDEa to CDEc.
-Procedure CDEa: Receiving the cutting blade provided in the above semi-automatic system] is made of rubber
To change from metal to metal. Measurement by semi-automatic system Transport of cardboard material
On the road, it is possible to rotate around the rotation axis along the width direction of the measurement cardboard material.
A pair of upper and lower rollers are provided, and the upper roller cuts the blade.
The lower roller forms the receiving roller.

-Procedure CDEb: Work the above measurement sheet piece from the measurement cardboard material of Example CDE.
The person cut out using a cutter, and the cut out measurement sheet piece was cut out as described above.
The above semi-automatic system in which the receiving roller was changed to metal in the procedure CDEa
Set in the system.
-Procedure CDEc: The measurement sheet piece set in the described procedure CDEb has the following shape and size.
Cut into pieces. The cut speed of the semi-automatic system is as follows
Set.
-Shape: Pattern in which the A-type cardboard box is unfolded-Size: Width dimension of the side plate of the A-type cardboard box 356 [mm],
Width dimension of the end plate of the A type cardboard box 159 [mm],
Height dimension of A type cardboard box 256 [mm]
・ Speed: 40 [m / min]
-Processed number: 2 [sheets]

The measurement sheet pieces processed according to the above procedures CDEa to CDEc were evaluated according to the following criteria.
・ ◎: The sheet can be easily separated by hand at all cut points.
・ ○: Some parts of the folds are not cut, but they can be separated by hand relatively easily.
It is possible to squeeze, and there is little roughness or fluffing on the cut end face.
・ △: There is a part of the bent part that is not cut, so it can be easily separated by hand.
It is possible, but when it is separated by hand, the cut end face becomes rough and fluffy.
・ ×: There is a part of the bent part that is not cut, and if you try to separate it by hand
Damage such as the core peeling from the liner occurs.

In the corrugated cardboard material measured by Example CDE, an excellent evaluation (“⊚” above) was obtained in terms of cut workability.
From the above evaluation results, it can be said that the measurement corrugated cardboard material in which the configurations C, D, and E are combined has a particularly remarkable effect that the cut workability is excellent when applied to the semi-automatic system.
As a result of this evaluation, by adjusting each of the thickness magnification, the interval magnification, and the intersection angle within the specified range, the ruled line part (crease) due to bellows folding is not extremely crushed, and the cutting blade is cut by the semi-automatic system. It is considered that good cutability was exhibited by sufficiently penetrating the thickness of the measurement sheet piece.

<Example DEA>
Example DEA in which configurations D, E and A are combined will be described.
The details of the measurement target and the evaluation of the DEA of Example are the same as those described above unless otherwise specified.
--Measurement target--
Example DEA was evaluated for measurement corrugated cardboard materials having the parameters listed below.
-Interval magnification: maximum 2.0 [times], minimum 1.8 [times]
・ Crossing angle: 0.05 [°]
・ Vacancy rate: 0 [%]

--Evaluation--
Measurement of Example DEA The uprightness, paper feed stability, and box-making property of the corrugated cardboard material were evaluated. As a result, excellent evaluation (“◎” mentioned above) was obtained in all of uprightness, paper feed stability and box-making property.
From the evaluation results of Example DEA, it can be seen that when the configurations D, E, and A are combined, the evaluations corresponding to the respective configurations D, E, and A are not impaired and are excellent.
Furthermore, it is presumed that the quality of the measured corrugated cardboard material is stable because of its excellent box-making property, film tearing and transportability. As a result, it is presumed that the dimensions of the assembled box are less likely to vary from the designed dimensions, and the dimensional stability of the box is improved. Furthermore, it is presumed that the ground contact area of the measured corrugated cardboard material is secured because there is no gap due to tri-folding and no vertical or horizontal deviation, and the frictional resistance increases, so that the deviation distance decreases.

<Example EAB>
Finally, an Example EAB in which configurations E, A and B are combined will be described.
The details of the measurement target and evaluation of Example EAB are the same as those described above unless otherwise specified.
--Measurement target--
Example EAB was evaluated for a measurement corrugated cardboard material having the parameters listed below.
・ Crossing angle: 0.05 [°]
・ Vacancy rate: 0 [%]
・ End face deviation: 10 [mm]

--Evaluation--
Measurement of Example EAB The paper feed stability, box-making property, and film tear were evaluated for the corrugated cardboard material. As a result, excellent evaluation (“◎” mentioned above) was obtained in all of paper feed stability, box making property, and film tearing.
From the evaluation results of Example EAB, it can be seen that when the configurations E, A, and B are combined, the evaluations corresponding to the respective configurations E, A, and B are not impaired and are excellent.
Furthermore, it is presumed that the quality of the measured corrugated cardboard material is stable because of its excellent box-making property, film tearing and transportability. As a result, it is presumed that the dimensions of the assembled box are less likely to vary from the designed dimensions, and the dimensional stability of the box is improved. Furthermore, it is presumed that the ground contact area of the measured corrugated cardboard material is secured because there is no gap due to tri-folding and no vertical or horizontal deviation, and the frictional resistance increases, so that the deviation distance decreases.

[III. Modification example]
The above-described embodiment is merely an example, and there is no intention of excluding the application of various modifications and techniques not specified in this embodiment. Each configuration of the present embodiment can be variously modified and implemented without departing from the gist thereof. In addition, it can be selected as needed and can be combined as appropriate.

For example, when the corrugated cardboard material is a material for a box making system, it is preferable that no additional processing such as intentionally formed cuts or perforations is applied to the surface layer of the liner in the corrugated cardboard material. It is preferable that the crease is a portion where the ruled line to be provided is folded back by 180 [°] from the starting point (for example, the ruled line is inside). On the other hand, when the corrugated cardboard material is a material other than that used for the box making system, processing such as cuts and perforations may be performed.

The use of the bellows-folded corrugated cardboard material described above is not limited to the use as a box-making material applied to a box-making system.
There are various ways to utilize the bellows-folded corrugated cardboard material, which is different from the conventional single-wafered corrugated cardboard sheet, and makes use of the structure in which a plurality of sheets are continuously provided through folds.
For example, the bellows-folded corrugated cardboard material can be treated as a web-like paper material having a large dimension in the extending direction in the unfolded state of the sheet.

As a method of using it as a web-like paper material, for example, the following uses can be mentioned as an example.
Use as a disaster product: By attaching it to a window, it can be used to prevent window cracking during a typhoon.
In addition, privacy protection and stress reduction at evacuation shelters
Use as a reduction partition, cushioning material and cold
It can be used as a rug for countermeasures.
Use at event events: Can be used for creative works such as signboards for events and school events
To.
Use as a building / moving material: Temporarily open doors, walls, doors, etc. at construction sites and moving sites
If you need to protect it, stick it on the object
It can be used as a protective material (curing material). Wrap around the object
Can be used as a protective material (packing material) to be attached
You can also do it.
In any of the usage methods, since the structure is such that a plurality of sheets are continuously provided through folds, there are advantages that work efficiency can be improved and dimensions in the extending direction can be secured.

1 Cardboard material 1W Cardboard web 10 Waves 2 Sheets 20 Sheets vs. 21 1st sheet 22 2nd sheet 23 3rd sheet 30 Movable range 40 Box making system 41 Rotating body 42 Strut 43 Guide roll E ₁ 1st end edge E ₂ 1st Two-end edge F Fold F1 First fold F2 Second fold FA Fold BS Reference position BL Separation dimension CL Coupling dimension DI Interval TS Reference dimension LP Predetermined dimension L1 Vertical dimension (first dimension)
L2 horizontal dimension (second dimension)
L3 height dimension (third dimension)
S gap θ intersection angle Cr ruled line

Claims (4)

In a continuous cardboard box, a rectangular sheet is folded back in a second direction orthogonal to the first direction on a plane along the fold at each of the folds extending linearly along the first direction. A bellows-folded corrugated cardboard material in which the sheets are stacked along a third direction orthogonal to both the direction and the second direction.
The dimension in the first direction is 850 [mm] or more and 2500 [mm] or less.
The dimension in the second direction is 900 [mm] or more and 2500 [mm] or less.
The dimension in the third direction is 700 [mm] or more and 2000 [mm] or less.
The distance between the folds adjacent to each other in the third direction, which is the distance between the folds in the third direction, is within a predetermined distance magnification range with respect to the reference dimension, which is the thickness dimension of one sheet.
The corrugated cardboard material is characterized in that the distance magnification range is a range in which the magnification of the interval with respect to the reference dimension is 1.0 [times] or more and less than 3.4 [times]. The dimension in the first direction is larger than 900 [mm], and
The dimension in the second direction is larger than 1000 [mm], and
At least one of the conditions that the dimension in the third direction is larger than 1200 [mm] is satisfied.
The corrugated cardboard material according to claim 1, wherein the maximum value of the magnification of the interval is 2.3 [times] or more, and the minimum value is 2.0 [times] or more. The cardboard material according to claim 1 or 2, wherein the corrugated cardboard is provided along the crease. A cardboard box using the cardboard material according to any one of claims 1 to 3.

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