JP2001151267A - Multipack carton and carton blank used for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use domestically available paper or used paper as base paper for multipack carton blank. SOLUTION: This relates to a multipack carton for packaging a plurality of containers such as cans or bottles in a multipack packaging machine. After the carton wraps the containers, it is folded along a ruled line prepared in advance and its bottom or top part is lock sealed. The carton blank used for this packaging is produced by punching out in a predetermined size one side or both side corrugated cardboard whose number of corrugation peaks is 120 or more per 300 mm and the height of the peaks is 0.5 mm or less.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carton used for a collective container package (so-called multi-pack) obtained by packaging a plurality of food containers such as beer and soft drinks in a multi-pack with a single carton blank. And carton blanks.

[0002]

2. Description of the Related Art A so-called multi-pack uses a multi-pack packaging machine (also referred to as a collective packaging machine) to form a carton blank (a punched blank also referred to as a sleeve).
A container such as an upright bottle or can is wrapped tightly from the top or bottom direction of the container by feeding at a rate of 100 to 300 sheets / min for each sheet by a method such as suction, and then a carton blank is prepared in advance. Is generally formed by bending along a ruled line provided at the bottom and locking the lower or upper part. As a lock seal, a method of pushing and inserting a male lock and a female lock of a carton blank is generally known.

FIG. 1 shows a typical example of a multi-pack package, and FIG. 2 is a diagram showing an outline of a multi-pack packaging process described in a handbook of processing technology (edited and issued by the Japan Packaging Technology Association). . FIG. 1 shows a state in which a plurality of upright containers 2 are packaged in a multi-pack carton 1 and a hole 3 for a handle is provided in an upper portion of the carton 1. In FIG. 2, a plurality of upright containers 2 are continuously supplied, and the multi-pack carton blanks 4 stacked on the paper feed unit are supplied one by one in the direction of the arrow from above, and 2 shows a process of wrapping a plurality of containers 2 that have been packed from above.

[0004] Another difference in form from a generally used carton caser packaging method is that a multi-pack package is packaged in one direction on the upper, front, rear, and lower surfaces, but on the side. The carton blank is open to the extent that the side edges of the carton blank are bent so that it does not protrude.The multipack has a handle for carrying or an opening corresponding to the handle at the top of the package. Are often used. In addition, the container can be easily removed by removing the container by hand from the opening on the side surface or by opening a perforated hole that has been processed in advance.

[0005] Also, multipacks are mainly used and the number is 4 to 1
It is used for applications with a relatively small number of two, and the carton is formed by processing a single paperboard and printed beautifully, so it has a good display effect at stores. In addition, the packaging form is characterized in that a consumer who has purchased the product at a store can directly carry it with one hand by inserting a finger into a hole for a handle provided at the top of the multipack. In particular, a 6-can multipack for canned beer is a typical example and is widely distributed. In the widely distributed 6-can multi-pack of canned beer, as shown in the example where four more multi-packs are put in one cardboard case, the multi-pack is different from the cardboard case for exterior and transportation in function and purpose. Apparently different.

Further, in multi-pack packaging, it is common to print in advance on a carton blank before packaging, and offset printing or gravure printing having excellent cosmetic printability is used, and cosmetic printability is somewhat inferior. Flexographic printing is not used.

Further, as described above, the multi-pack has a structure in which the handle is provided on the upper part of the package and is carried by the consumer by hand. If the strength of the base paper is not maintained, the contents of the container may come off the carton. There is a risk that it will. For this reason, it is indispensable that the carton blank base paper for the multipack has a necessary and sufficient strength. Due to the necessity from the viewpoint of strength and the above-described printability, the carton blank base paper for a multi-pack has conventionally had a relatively basis weight (g).
/ M ² ) and high tear strength (mainly imported paper with a long fiber length) have been selected.

[0008] As a business factor, when concluding a leasing and sales contract for a multi-pack packaging machine with a machine manufacturer, generally, the packaging machine and the carton blank require the carton blank base paper to exhibit the performance of the machine system. There were cases specified by the machine manufacturer, and many of them were imported paperboard base paper having relatively large basis weight and high tear strength as described above.

[0009]

However, when the imported paper having a long fiber length for the multipack is to be reused as waste paper after use of the product, the disintegration of the fiber is poor and the disintegration takes too much time. Has a reuse problem. Furthermore, since it is imported paper, there are also problems in terms of stable supply and cost.

Further, even if it is desired to use an inexpensive paperboard single-sheet material using waste paper as a part of the raw material for the multi-pack base paper, there is a problem of strength in supporting the contents filled in the multi-pack and moisture resistance. However, it is difficult to use waste paper because the weight must be increased by increasing the basis weight, and if the thickness is increased, problems arise in suitability for box making and printing characteristics in a multi-pack packaging machine.

[0011] By the way, cardboard is widely used as an exterior box, and as shown in Table 1, A, B,
Although there are various types of corrugations such as C corrugations, the use is wide, but these cardboards have never been considered as carton blanks for multipacks for the following reasons.

[0012]

[Table 1]

Considering the formation of relatively thick cardboard sheets such as A, B, and C steps into a carton-like form, these cardboards are inferior in the accumulation efficiency at the time of commercial distribution to paperboard. Furthermore, printing on these thick cardboards is possible with flexographic printing, but offset printing or gravure printing used in multipacking is difficult due to the structure of the printing machine. Was considered unsuitable. Offset printing and gravure printing have been used for multipacks because these printings are superior to flexographic printings in terms of aesthetic printability.

[0014] Further, even in the case of corrugated cardboard sheets referred to as E steps having a step height of about 1.2 mm and F steps having a step height of about 0.6 to 0.7, the mechanical suitability of an offset printing machine, the warpage of a stacking section, etc. It can be said that the suitability for this use was poor compared to paper. Furthermore, stages E, F, and M are not suitable for high-speed operation in machine suitability such as molding and sealing of a multi-pack packaging machine. Further, as in the case of the stages A, B, and C, the printability of offset printing or gravure printing is inappropriate.

For the above reasons, forest resource protection,
From the viewpoints of improving the utilization rate of waste paper and providing a stable supply of base paper, there has been a demand for a proposal for a multi-pack domestic carton blank which has machine suitability and handling suitability for a packaging machine and a printing machine, and is easy to use for waste paper. An object of the present invention is to use a strong and lightweight sheet as a carton blank for a multi-pack to eliminate waste of resources and to facilitate carrying a package, and a versatile sheet available in Japan. The purpose of the present invention is to stably supply base paper by using the method, and to facilitate the use of waste paper. In order to solve these problems, the present inventors have studied diligently and confirmed by various tests that a micro flute having a thickness and rigidity close to that of a single paper board is suitable for multi-pack in terms of printability and strength. Thus, the present invention has been completed.

[0016]

According to the present invention, the above-mentioned problems have been solved by employing a micro flute defined as follows as a carton blank for a multipack. The present invention includes the following inventions.

(1) In the first invention, the number of steps is 300 mm.
Using a carton blank punched out of single-sided cardboard or double-sided cardboard having a cardboard height of 120 mm or more and a cardboard height of 0.5 mm or less to a predetermined size, wrapping multiple containers such as cans and bottles in a multi-pack packaging machine and applying in advance. A multi-pack carton and a carton blank used in the multi-pack carton, wherein the multi-pack carton is folded and formed along the ruled line, and is locked and packaged at the bottom or the top. still,
Lock sealing is a method in which a male lock and a female lock of a carton blank are sealed by a method of pushing or inserting a male lock and a female lock, and hot melt bonding may be used together.

(2) The second invention is the multi-pack carton and the carton blank used in the multi-pack carton according to (1), wherein a base paper having water resistance or oil resistance is used at least as a base liner base paper. .

(3) The third invention is characterized in that a thermoplastic synthetic resin such as polyethylene, polypropylene, polyethylene terephthalate or the like is extruded and laminated on at least one side of a core base paper or a front liner base paper, (1) or (2). ) And a carton blank used therefor.

(4) The fourth invention is based on JIS-P8116.
(1) to (3), wherein a specific tear strength measured based on (a tear strength test method for paper and paperboard) is 20 mN / (g / m ² ) or more. And a carton blank used therefor.

(5) The fifth invention is based on JIS-P8125.
(Stiffness test method of paperboard with Taber stiffness tester)
The multi-pack carton according to any one of (1) to (4), wherein the specific Taber stiffness obtained by dividing the Taber stiffness measured by the basis weight is 0.2 mNm / (g / m ² ) or more. And a carton blank used for this.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION The single-sided cardboard or double-sided cardboard used in the present invention has a core having a corrugated number of 300 mm.
120 or more, and the step height is 0.5 mm or less,
It is included in a cardboard sheet generally called a micro flute.

If the step height is 0.5 mm, in the case of a three-sided double-faced cardboard, the total thickness is 0.8 to 1.0 mm.
And corresponds to the thickness of a single-layer paperboard having a basis weight of about 450 g / m ² . That is, if the step height is 0.5 mm or less, the overall thickness becomes about 1.0 mm or less, and the suitability for offset printing and gravure printing frequently used in multi-pack packaging after bonding is good. Suitable. Conversely, if the step height exceeds 0.5 mm, the offset printing and the gravure printing suitability become poor, and it is not suitable for a multipack. In the case of a cardboard having a step height of 0.5 mm or less, suitability for high-speed box making in a multi-pack packaging machine is good.

In other words, one of the major differences between the conventional E-, F-, and mini-corrugated cardboard and the micro flute used in the present invention is that the micro flute in the present invention is frequently used in multi-pack packaging after lamination. Good suitability for offset printing presses and gravure printing presses. On the other hand, the E-stage, F-stage, and mini-stage having an overall thickness of 1 mm or more are poor in machine suitability due to structural problems in offset printing and gravure printing, and in particular, the E-stage cannot even supply a sheet of a printing press. .

In the offset printing press, when the sheets sent one by one from the feeder unit (supply unit) are held together and conveyed to the printing unit, the sheets fall within a standard range (about 0.8 to 0.8).
If the printed matter is thicker than 1.0 mm), the supply will be defective and the printed matter will be clogged. Also in the printing unit, pressure is applied by the impression cylinder and blanket of the printing roll,
Since the thickness of the tier and mini tier is 1.0 mm or more, even if they can be fed, even if they can be fed, the ink should be transferred evenly in order to perform good cosmetic printing. It was necessary to crush to 5 mm or less. Once the corrugated structure is crushed, it is difficult to recover to the initial sheet thickness, although there is a return after the printing unit. Furthermore, the F and mini stages tended to curl if restoring was not uniform after printing fuzz in the stacking section after printing, and stacking troubles were likely to occur.

Further, although the printing speed when using a single paperboard is usually 120 sheets / min or more,
In the case of a stage and a mini stage (M stage), the productivity is inferior because it is 50 sheets / min or less. Also, the suitability for high-speed box making in a multi-pack packaging machine is a large trouble factor due to the thick paper.

For the above reasons, corrugated cardboard having a corrugated height of 0.5 mm or less is suitable as a multi-pack carton blank. Note that microflutes also have a problem in manufacturing technology, and those that have been put into practical use generally have a step height of about 0.4 mm, and the step height of the cardboard used in the present invention is practically 0. 0.4mm to 0.5mm
Up to.

In the present invention, the number of corrugations of the core of the corrugated cardboard is 120 or more per 300 mm in length. However, if the number of corrugations is more than this, the tear strength and rigidity of the carton blank will increase, and the multipack will be used. The required strength can be satisfied. Further, when the number of peaks is equal to or more than 120 per 300 mm, the uniformity of the surface of the carton blank is improved, which is suitable for cosmetic printing performed on a multipack. Conversely, if the number of peaks is less than 120 per 300 mm, it is unsuitable in terms of strength required for a multipack and adequacy printing. In addition, micro flute has a problem in manufacturing technology,
In general, the number of peaks per 300 mm is about 180, and the number of corrugations of the cardboard used in the present invention is practically 120 or more and about 180 per 300 mm.

In comparison with the strength of a thick paperboard conventionally used in a multipack, the carton blank (microflute) for a multipack according to the present invention is described in JIS-P8116 “Paper” which is an important element for a multipack. And a specific tear strength measured based on "Tear strength test method of paperboard".
That is, when the conventional multi-pack paperboard (basis weight 450 g / m ² ) and other ordinary paperboards (basis weight 450 g / m ² ) are compared in terms of specific tear strength, the longitudinal (T) direction Are 14.4 mN / (g / m ² ) and 8.3 m, respectively.
N / (g / m ² ). The horizontal (Y) direction is 1 for each.
The values were 6.8 mN / (g / m ² ) and 9.3 mN / (g / m ² ).
On the other hand, the multi-pack carton blank (micro flute) of the present invention was manufactured by laminating both the front liner, the core, and the back liner with a bleached kraft having a basis weight of 80 g / m ^2. is substantially the same 0.6mm paper board, total basis weight (basis weight of the corrugated medium corresponds to a value obtained by dividing the stage repeatedly rate, weight per cardboard 1 m ^2, including the mass of glue) is 310 g / m ² Despite being light and lightweight, the specific tear strength is 29.1 mN / (g / m ² ) and width (Y) 2 higher than that of the conventionally used multi-pack paperboard.
The value was 6.4 mN / (g / m ² ) (see Examples).

Each of the constituent base papers of the microflute according to the present invention has a thickness of about 0.1 mm, and the specific tear strength of each constituent paper is 13 mN / (g) in the vertical (T).
/ m ² ), but the thickness is increased by laminating and laminating, and the specific tear strength as a laminated base paper is improved to 29.1 mN / (g / m ² ) as described above. It is presumed to be.

As described above, the total thickness is set within the thickness limit of the supply section (about 0.8 to 1.0 mm), and the base paper of three or two layers is selected according to the required function. Thus, it has become possible to produce a multi-pack carton blank using a micro flute which has the required strength as a multi-pack and has excellent printing characteristics.

As described above, when the step height is 0.5 mm or less, 300 m
By setting the number of steps per m to 120 or more, a microflute having an overall thickness of 1 mm or less is obtained. By using this as a base paper for a multipack, the carton blank for a multipack can be converted into a unit area (m ² ) In terms of conversion, it is possible to reduce the weight, and if the base paper cost is large lot, even if the lamination processing fee is included, it can be equalized or reduced compared to the single board cost.

Further, by selectively utilizing the physical properties of each base paper individually, it is possible to change the moisture-proof suitability, water resistance, heat insulation, heat retention, etc. of the micro flute which were difficult to obtain with single paper. It becomes possible. For example, by adopting a base paper having water resistance or oil resistance for the front liner as in the invention of claim 2, it is possible to impart water resistance and oil resistance as the whole micro flute.

Similarly, by laminating the front liner, the core and the like as in the third aspect of the invention, it is possible to impart heat insulation and moisture proof functions to the microflute which is the base paper of the multi-pack carton. .

The microflute multi-pack carton blank used in the present invention is JIS-P
8116 (Testing method for tear strength of paper and paperboard) has a specific tear strength of 20 mN / (g /
m ² ) or more. By having such a specific tear strength, it is possible to satisfy the strength required for carrying the multipack without excessively increasing the basis weight.

The microflute multi-pack carton blank used in the present invention is JIS-P
It is preferable that the specific Taber stiffness obtained by dividing the Taber stiffness measured based on 8125 (a stiffness test method using a Taber stiffness tester for a paperboard) by the basis weight is 0.2 mNm / (g / m ² ) or more. By having such a specific Taber stiffness, it is possible to satisfy the strength required for carrying a multi-pack and the suitability for high-speed can making in a multi-pack packaging machine without increasing the basis weight more than necessary. .

The carton blank made from the microflute of the present invention as described above is supplied to a multi-pack packaging machine in place of the conventional single-sheet paperboard, and the carton blank is formed in the same manner as the conventional single-sheet paperboard. Can be locked and sealed. The carton blank made from the micro flute of the present invention has no problem in suitability for box making in a multi-pack packaging machine. It goes without saying that it is necessary to select each base paper of each layer according to the machine specifications of the multi-pack packaging machine.

[0038]

EXAMPLES Various tests have confirmed that a carton blank comprising the microflute of the present invention having a thickness and strength close to that of a single paperboard developed and developed for a multipack has sufficient strength for a multipack. Examples of the newly developed carton blanks made of micro flutes and conventional general multi-pack paperboards are shown below.

<Example 1> As a front liner / core / back liner constituting the micro flute, a single-gloss bleached kraft (basis weight 80 g / m ² ) / blown kraft (basis weight 80 g /
m ² ) / bleached kraft (basis weight 80 g / m ² ) and bonded with a corrugator. First, bleached kraft 80g /
step height 0.5mm describing the m ² above, elevated portions 155 pieces /
After molding with a step roll (per 300 mm), the paste used for a known exterior cardboard mainly made of corn starch was transferred to the step top, and bleached kraft for back liner 80 g /
m ² and bonded, after transferring the glue used in the take-up conveyer after being discharged to the bridge portion, the known outer carton mainly composed of corn starch Dan'itadaki portion at separately prepared by glue unit, table liners After being bonded to 80 g / m ² of one-sided bleached kraft, it was heated and dried by a hot plate unit and punched into a rectangular predetermined size by a slitter and a cutter. FIG. 3 shows the cross-sectional shape of the obtained cardboard.

Thereafter, after printing on the front liner surface by an offset printing press, the sheet was punched into a predetermined multi-pack carton blank size by a separately prepared punching machine, and was simultaneously subjected to ruled line processing. In the case of corrugated cardboard as in this example, printing can be performed in advance in a rolled state on the surface of the front liner by a method such as gravure, flexo, or offset rotary press. In this method called pre-printing method suitable for relatively large lots, after lamination, the sheet is cut without going through the printing process, then punched,
Although ruled line processing is performed to finish the size into a multi-pack exclusive size, it cannot be said that it is a general method.

The specific tear strength of the microflute obtained by the above method was measured based on JIS-P8116 (test method for tear strength of paper and paperboard). Also, J
The Taber stiffness was measured based on IS-P8125 (a stiffness test method using a Taber stiffness tester for paperboard), and this was divided by the grammage to obtain the specific Taber stiffness. Table 2 shows the measurement results. The grammage is 1 m ² of the obtained micro flute.
Actual basis weight per unit (the core is equivalent to the basis weight divided by the step repetition rate,
(Including the mass of the bonding paste), and the same applies to other examples. Further, the vertical (T) indicates the value of the specific tear strength and the specific Taber stiffness when the paper is torn along the papermaking direction or folded at a right angle to the papermaking direction, and the horizontal (Y) is the vertical.
The measured value in the direction perpendicular to the measuring direction of (T) is shown.

The multi-pack carton blank of the present invention molded by the above method has a low basis weight in each of the constituent base papers as compared with the single paper board in the bonded state.
Compared with 490 g / m ² (Comparative Example 1) and 450 g / m ² (Comparative Example 2) single coated paper balls, the specific tear strength and the specific Taber stiffness of the imported multi-pack base paper are higher than that of the multi-pack carton. The strength is sufficient. Further, a high specific Taber stiffness is suitable for high-speed moldability in a multi-pack packaging machine.

<Example 2> bleached kraft as front liner / middle core / back liner constituting microflute
Example 1 (basis weight 140 g / m ² ) / core base paper for exterior corrugated cardboard (basis weight 115 g / m ² ) / jute liner (basis weight 125 g / m ² ) specified in JIS P3904.
A three-layer corrugated cardboard was manufactured in the same procedure as described above. Further, cardboard obtained by the same method as in Example 1
The specific tear strength and specific Taber stiffness of (microflute) were determined, and the results are shown in Table 2.

It was confirmed that the corrugated cardboard liner had a higher rice basis weight than that of Example 1 and the stiffness and surface properties of the single sheet were good, so that it was more excellent in offset printing suitability. This is Example 2 when comparing the finish of the printing surface.
Can be judged from the fact that the ink rides better than in Example 1 and the streak unique to the cardboard at the top of the step is not visible. Specific tear strength and specific Taber stiffness are imported multi-pack base paper 49
0 g / m ² (Comparative Example 1) and coated paper ball 450 g /
m ² (Comparative Example 2), and was judged to be more suitable for use in a 12-can multipack packaging of beer and the like from the viewpoint of surface printability.

<Comparative Example 1> As a comparison, a single paper board (basis weight 490) of imported paper conventionally used for a multipack was used.
g / m ² ) and a specific Taber stiffness were determined in the same manner as in Example 1. The results are shown in Table 2. This paper is a specially designated paper for multi-packs that are usually used,
It has been confirmed that, since the rice tsubo is high and the tear strength, rigidity, and surface properties of the single sheet are good, the suitability for offset printing after lamination is excellent. Also, suitability for a multi-pack packaging machine is of course no problem.

<Comparative Example 2> Next, the specific tear strength and specific Taber stiffness of a coated ball (basis weight 450 g / m ² ) used in a general paper carton were determined in the same manner as in Example 1, and the results were tabulated. 2 is shown. This paper has been confirmed to be excellent in offset printing suitability because the rigidity and surface properties of the single paper are good, but the tear strength is not as high as that of Comparative Example 1. The suitability for a multi-pack packaging machine also has a weak lock sealing strength at the bottom, and the strength is insufficient for heavy objects such as canned beer. Although it is possible to apply it to small and lightweight objects, it is poor in versatility.

Comparative Example 3 Next, bleached kraft (basis weight 80
g / m ² ) and a specific Taber stiffness were determined in the same manner as in Example 1. The results are shown in Table 2. Of course, it is impossible to use this base paper alone as a multi-pack carton. The step forming without cracks is possible for the core of the micro flute, and it can be used favorably as a member of the micro flute. Various types of base paper with different blending ratios of waste paper can be used for the core.

[0048]

[Table 2]

As can be seen from Table 2, the carton blanks of Examples 1 and 2 according to the present invention have a low basis weight and a small thickness, as described above. It is stronger and can be said to be excellent as a multi-pack carton blank.

[0050]

The multi-pack carton blank base paper using the micro flute according to the present invention has a lower basis weight and a smaller thickness than the conventional multi-pack base paper used as a single sheet. It has sufficient strength and is suitable for offset printing and gravure printing after bonding, and therefore has a sufficient function for use in multipacks. In addition, each base paper used for each layer of the micro flutes has a cardboard structure even if it has relatively low strength by itself, so that the overall strength and the strength per unit weight are improved. This makes it possible to use domestically produced paper with increased levels, while at the same time saving forest resources. Further, the weight reduction makes it easier to carry the multipack package. In addition, since microflutes, which are easy to produce in Japan, are used, a stable supply of base paper can be achieved, and the purchase unit price can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a multi-pack carton.

FIG. 2 is a diagram showing an outline of a multi-pack packaging process.

FIG. 3 is a diagram illustrating the shape of a micro flute (G flute) according to the first and second embodiments.

[Explanation of symbols]

1. Multi-pack carton 2. 2. upright containers 3. Holes for handles at the top of the multi-pack carton. Carton blank for multipack

Continuation of the front page (72) Inventor Nobuhiro Taguchi 4-7-5 Ginza, Chuo-ku, Tokyo Oji Paper Co., Ltd. F term (reference) 3E067 AA03 AA21 AB26 AC03 AC12 BA04B BA20C BB02C BB11B BB16C BB25C CA07 DA08 EA22 EB01 FA04 FA06 FC01 FC04

Claims (6)

[Claims] 1. A multi-pack carton in which a plurality of cans, bottles, and other containers are wrapped in a multi-pack packaging machine, bent and formed along a pre-assigned ruled line, and locked and packaged at the bottom or top. A carton blank to be used, which is formed by punching a single-sided or double-sided corrugated cardboard having a peak number of 120 or more per 300 mm and a step height of 0.5 mm or less into a predetermined size. blank. 2. The carton blank according to claim 1, wherein a base paper having water resistance or oil resistance is used at least as a base liner base paper of the cardboard. 3. A thermoplastic synthetic resin such as polyethylene, polypropylene, or polyethylene terephthalate, which is extruded and laminated on at least one surface of the core base paper or front liner base paper of the cardboard.
Or the carton blank according to claim 2. 4. The specific tear strength of the corrugated cardboard measured according to JIS-P8116 (test method for tear strength of paper and paperboard) is 20 mN / (g / m ² ) or more. The carton blank according to any one of claims 1 to 3. 5. The specific Taber stiffness obtained by dividing the Taber stiffness of the cardboard measured by JIS-P8125 (a stiffness test method using a Taber stiffness tester for paperboard) by a basis weight is 0.2 mNm / (g / m ^2). 5) The carton blank according to any one of claims 1 to 4. 6. A multi-pack carton in which a plurality of containers such as cans and bottles are wrapped in a multi-pack packaging machine, bent and formed along a pre-assigned ruled line, and locked and packaged at the bottom or top. A multi-pack carton formed using the carton blank according to any one of claims 1 to 5.