JPWO2018123302A1 - Sheet-like material and manufacturing method thereof - Google Patents

Abstract

To provide a sheet-like object (1) in which the cutting load is accurately estimated and the specification of the cutting line (15) is set so that the cutting load is appropriate. The sheet-like object (1) has a first cut region (11) surrounded by a cut line (15) in which cut portions (15a) and continuous portions (15b) are alternately arranged, and one of the continuous portions (15b). The maximum tensile load ci (N) per unit is determined by measuring the first unit load a (N / mm) measured in advance, the second unit load b (N / mm) measured in advance, and the length of the continuous part (15b). All the continuous portions (15b) of the first cutout region (11) are obtained from the following formula [1] based on the dimension di (mm) and the angle θi (°) of the continuous portion (15b) with respect to the first direction. ), The total value Σci of the maximum tensile loads ci of all the continuous parts (15b) is 2 to 25 (N).

Description

  The present invention relates to a sheet-like material having a cut region surrounded by a cut line in which cut portions and continuous portions are alternately arranged, and more particularly to a sheet-like material in which the cut load in the cut region is optimized and a manufacturing method thereof.

  In Patent Document 1 (see paragraphs [0014], [0020], FIG. 3), an in-mode label (5) surrounded by perforations is punched from a sheet material (2) at a punching station (10), and this punching is performed. Further, there is described a device for carrying the in-mode label (5) to the next process by the first robot arm (20). In addition, the code | symbol with a parenthesis is a code | symbol used by patent document 1. FIG.

JP2013-103443A

In the apparatus disclosed in Patent Document 1, the in-mode label (5) must be punched (separation process) and the punched in-mode label (5) is transported (transport process) separately. If the in-mode label is pulled and separated by the robot arm and is transported to the next process as it is by the robot arm, the label separation process and the transport process are integrally performed, so that the apparatus can be simplified.
However, when the label is gradually separated from one end side to the other end side when the label is pulled and separated from the sheet material, the force acts on the separation portion (hereinafter also referred to as “continuous portion” or “non-cut portion”). There is a possibility that unevenness may occur, burrs may occur, or the film may be cut off at positions away from the perforations. In addition, the punching mechanism becomes complicated, which may increase the cost.
For this reason, it is preferable to apply force to the entire label and cut the entire label at once, that is, to cut the entire perimeter of the cut line at the same time. For this purpose, the force required to cut the entire label at once (hereinafter referred to as “cutting load”) is smaller than the pulling force of the robot arm in advance, and the label does not fall off the sheet material due to its own weight. Must be set larger than the label weight. Moreover, after forming a separation part in a sheet | seat material, a printing process and a conveyance process may be performed. In such a process, since tension is applied to the sheet material, if the cutting load is smaller than this tension, the separation portion may be cut and the label may fall off. Therefore, there is a demand for a sheet material in which the label cutting load is accurately calculated in advance and the label cutting load is optimized.

  The present invention was devised in response to the above-mentioned request, calculates the cutting load with high accuracy, and sets the specification of the cutting line so that the cutting load is appropriate, the manufacturing method thereof, It aims at providing the calculation method of a cutting load, and the setting method of the cutting line in a sheet-like article.

(1) In a sheet-like material having a first cut region surrounded by cut lines in which cut portions and continuous portions are alternately arranged, the maximum tensile load ci (N) per one continuous portion was measured in advance. The first unit load a (N / mm), the second unit load b (N / mm) measured in advance, the length dimension di (mm) of the continuous part, and the angle θi of the continuous part with respect to the first direction When calculating from the following formula [1] based on (°) in all the continuous portions of the first cutout region, the total value Σci of the maximum tensile loads ci (N) of all the continuous portions Is 2 to 25 (N), a sheet-like product.

  (2) There are three or more continuous parts, and a polygon having the largest area among the polygons defined by connecting the midpoints of the three or more continuous parts with straight lines is selected as a reference polygon. The sheet-like object according to (1), wherein the center of gravity of the first cut region is located within the reference polygon.

  (3) The film according to (1) or (2), wherein the film is a long film extending in the first direction, and a plurality of labels as the first cut-out area are arranged along the first direction. Sheet material.

  (4) In a sheet for setting a cutoff line corresponding to the first cutoff area and having a second cutoff area surrounded by a cutoff line in which cut parts and continuous parts are alternately arranged, the maximum tensile load per one continuous part Ci (N) is obtained from the equation [1] in all the continuous portions of the second cut-out region, and the continuous portion having the minimum value among the maximum tensile loads ci (N) is the continuous portion. The sheet-like material according to any one of (1) to (3), wherein when the value is min, the continuous part is not provided at a position corresponding to the continuous part min in the first cut region. .

  (5) A maximum tensile load per one continuous portion in the cut line setting sheet corresponding to the first cut region and having a second cut region surrounded by a cut line in which cut portions and continuous portions are alternately arranged. Ci (N) is obtained from the equation [1] in all the continuous portions of the second cut-out region, and the continuous portion having the minimum value among the maximum tensile loads ci (N) is the continuous portion. The length dimension of the continuous part at the position corresponding to the continuous part min in the first cut region is larger than the length dimension of the other continuous parts, when min. Item 1. The sheet-like material according to item 1.

  (6) The maximum tensile load per one continuous portion in the cut line setting sheet corresponding to the first cut region and having a second cut region surrounded by a cut line in which cut portions and continuous portions are alternately arranged. Ci (N) is obtained from the equation [1] in all the continuous portions of the second cut-out region, and the continuous portion having the maximum value among the maximum tensile loads ci (N) is the continuous portion. The sheet-like material according to any one of (1) to (5), wherein the continuous part is not provided at a position corresponding to the continuous part max in the first cut region when the maximum cut area is set to max. .

  (7) The maximum tensile load per one continuous portion in the cut line setting sheet corresponding to the first cut region and having a second cut region surrounded by a cut line in which cut portions and continuous portions are alternately arranged. Ci (N) is obtained from the equation [1] in all the continuous portions of the second cut-out region, and the continuous portion having the maximum value among the maximum tensile loads ci (N) is the continuous portion. (1) to (5), where the length dimension of the continuous part at the position corresponding to the continuous part max is smaller than the length dimension of the other continuous parts in the first cut region, The sheet-like material according to any one of the above.

(8) A method for manufacturing a sheet-like material having a first cut region surrounded by a cut line in which cut portions and continuous portions are alternately arranged, wherein the maximum tensile load ci (N) per one continuous portion is , A first unit load a (N / mm) measured in advance, a second unit load b (N / mm) measured in advance, a length dimension di (mm) of the continuous portion, and the first unit load a (N / mm) of the continuous portion When obtaining the following equation [1] based on the angle θi (°) with respect to one direction in all the continuous portions of the first cutout region, the maximum tensile load ci (N The cut line is arranged so that the total value Σci of) becomes 2 to 25 (N).

  According to the present invention, it is possible to accurately calculate the cutting load in the cutting area. Then, based on the calculated cutting load, it is possible to set the specification of the cutting line so that the cutting load of the cutting area in the sheet-like material is appropriate. Therefore, when performing a printing process, a conveyance process, etc. to a sheet-like article, it can prevent that a cutting area falls off. In addition, since the cut region can be separated from the sheet-like material with an appropriate stress, the manufacturing efficiency of the label is excellent, and the formation of a beard-like or burr-like deformed portion on the outer periphery of the cut region is suppressed.

It is a perspective view which shows a container with a label. It is a top view which shows typically the whole structure of a manufacturing apparatus. It is a perspective view which shows a film and a label. It is a schematic diagram for demonstrating the continuous part of a curve-shaped cutoff line. It is a perspective view which shows a film and a label. It is a schematic diagram for demonstrating the test of the tensile load of a label, (a) is a principal part side view of a testing apparatus, (b), (c) is a top view which shows a film and a label. (A), (b) is the graph which plotted the calculated value and measured value of the tensile load of a continuous part. It is a top view of the typical punching die for demonstrating an Example. It is the graph which plotted the calculated value of the tensile load of the continuous part of a label. It is a graph for calculating the tensile load normalized in the x-axis (longitudinal direction) and the y-axis (short direction).

  The present invention will be described with reference to the drawings. Note that the embodiment described below is merely an example, and there is no intention to exclude various modifications and technical applications that are not explicitly described in the following embodiment. Each configuration of the present embodiment can be implemented with various modifications without departing from the spirit thereof. Further, they can be selected as necessary, or can be appropriately combined.

In the following embodiment, a film in which at least three layers are laminated in the order of a heat seal layer, a base layer, and a print layer will be described as an example of a sheet-like material. This film has a cut region (label), and the label is surrounded by a cut line in which cut portions (hereinafter also referred to as “discontinuous portions”) and continuous portions are alternately arranged.
In the present embodiment, a long film extending in a predetermined direction (hereinafter also referred to as “first direction”) is shown. In this film, a plurality of labels as cut-out areas are arranged along a predetermined direction. A plurality of labels may be arranged along a second direction orthogonal to the first direction.
Although the predetermined direction is not particularly limited, FIG. 3 illustrates the film 1 extending in the longitudinal direction MD (hereinafter simply referred to as “MD”). In FIG. 3, only one label (cut region) 11 is shown, but a label 10 (labels 11 and 12 as shown in FIG. 1) is formed along the MD of one main surface of the long (band-like) film 1. ) Are regularly arranged. These labels 10 can be separated from the film 1 as will be described later.
In this film 1, from the back side (the front side in FIG. 3) to the front side (the back side in FIG. 3), a heat seal layer 1a made of a resin layer, a base layer 1b, and a printing layer 1c are sequentially arranged. At least three layers are laminated.

The heat seal layer 1a functions as an adhesive for joining the label 10 and the container 2 shown in FIG. 1, and is a low melting point resin layer formed of a low melting point resin.
The heat seal layer 1a is solid at normal temperature, but is activated by the heat of the melted resin when the adherend (container 2) is molded in the mold, melted and adhered to the adherend, and after cooling Becomes solid again and exhibits strong adhesive strength.

  A part of the film 1 is labels 11 and 12 (see FIG. 1), and the other part is a margin 13 (see FIG. 3). In order for the labels 11 and 12 not to fall off the film 1, the labels 11 and 12 and the margin 13 are partially connected in the state where the film 1 is unwound, and the labels 11 and 12 and the margin 13 are completely connected. Are not separated. That is, along the preset contour shape of the labels 11 and 12, the cut line 15 in which the cut portions 15 a and the continuous portions (non-cut portions) 15 b are alternately arranged is provided, and the labels 11 and 12 are provided via the cut lines 15. However, it is comprised so that cutting from the film 1 is possible.

Each dimension will be described taking the film 1 and label 11 of FIG. 3 as an example.
Although the length dimension along short direction TD (henceforth "TD" only) of the film 1 is not specifically limited, For example, it is 100-500 mm. Moreover, although the length dimension along MD of the film 1 is not specifically limited, For example, it is 10-500 m. Further, the thickness dimension of the film 1 (hereinafter also referred to as “film thickness t”) is not particularly limited, and is, for example, 30 to 100 μm.
Although the length dimension along TD of the label 11 is not specifically limited, For example, it is 50-300 mm. Moreover, although the length dimension along MD of the label 11 is not specifically limited, For example, it is 50-300 mm.
Although the space | interval of the labels arranged in multiple numbers on the film 1 is not specifically limited, For example, it is 10-30 mm. Moreover, the ratio of the area of the label 11 to the area of the film 1 in plan view is not particularly limited, but is, for example, 30 to 90%.
Although the material which comprises the film 1 is not specifically limited, For example, paper or a thermoplastic resin is mentioned. Examples of the thermoplastic resin include polyolefin resins such as polyethylene resins and polypropylene resins; polyester resins such as polyethylene terephthalate resins and polybutylene terephthalate resins.

  Moreover, although the tensile elasticity modulus of the film 1 is not specifically limited, For example, it is 0.5-4GPa. Although the tensile strength of the film 1 is not specifically limited, For example, it is 20-200 MPa. Although tensile strength distortion is not specifically limited, For example, it is 70 to 700%. The tensile modulus, tensile strength, and tensile strength strain can all be measured according to JIS K7161-1: 2014 and JIS K7161-2: 2014.

First, the setting method of the cutoff line 15 which is a major feature of the present invention will be described with reference to FIG.

[1. Cutting line setting method]
When a tensile load exceeding the cut load Pr of the label 11 is applied, the cut region surrounded by the cut line 15, that is, the label 11 is cut from the film 1.
Since the label 11 is pulled from the film 1 by the arm portion 61 and cut off, the label 11 cannot be cut from the film 1 if the cut load Pr of the label 11 is larger than the tensile load Parm of the arm portion 61. Therefore, the cut load Pr of the label 11 is set to be smaller than the tensile load Parm of the arm portion 61. The tensile load Parm of the arm portion 61 has no mechanical upper limit. However, if the tensile load Parm is too high, when the label 11 is cut from the film 1, an impact is given to the film 1, and the continuous portion included in the cut line 15. Since stress concentrates on 15b and the film 1 is torn in an unexpected direction, the label shape may be deteriorated or the film 1 may be broken (hereinafter referred to as “label tearing in the opposite direction”). The tearing of the label in different directions can also cause a so-called beard-like or burr-like deformed portion (hereinafter simply referred to as “deformed portion”) to occur on the outer periphery of the label. Further, when tearing of the label in the different direction occurs, it may be difficult to cut off the label 11 from the film 1. That is, there is a possibility that the suction take-off property is lowered.
Therefore, from the viewpoint of suppressing tearing of the label 11 in different directions and being excellent in suction pullability, the cut load Pr of the label 11 is 25 N or less, preferably 20 N or less, and more preferably 15 N or less.
On the other hand, if tension is applied to the film 1 in the process of transferring the film 1 for processing such as printing and slitting after the cut line 15 is provided at the time of manufacturing the film 1, stress is concentrated on the continuous portion 15 b included in the cut line 15. As a result, the continuous portion 15b may be cut. When the continuous part 15b included in the cut line 15 is completely cut, the label 11 is unexpectedly separated from the film 1 by its own weight. Therefore, dropping of the label 11 is suppressed by setting the cut load Pr of the label 11 to a specific lower limit value or more. The cutting load Pr of the label 11 obtained from the experiment is 2N or more, preferably 2.5N or more, more preferably 3N or more, and particularly preferably 4N or more.

Specifically, the cut line 15 is formed by alternately arranging the cut portions 15a and the continuous portions 15b as described above, and the cut load Pr of the label 11 is distributed between the cut portions 15a and the continuous portions 15b (in other words, Therefore, the cutting load Pr of the label 11 is calculated based on this distribution, and the cutting portion 15a and the cutting portion 15a are set so that the cutting load Pr falls within a specific range. Distribution with the continuous part 15b is set.
The cut load Pr [N] of the label 11 is obtained by the following equations [1] and [2]. That is, according to the following equation [1], the maximum tensile load ci [N] of each continuous portion 15b is changed to a first unit load a [N / mm] measured in advance and a second unit load b [ N / mm], the length dimension di [mm] of each continuous portion 15b, and the angle θi [degree] with respect to the MD of the film 1 of each continuous portion 15b. Then, as shown in the following formula [2], the total value of the maximum tensile loads ci of the continuous portions 15b is defined as the cut load Pr of the label 11.

Here, the first unit load a is the maximum tensile load in the first unit continuous portion when the first unit continuous portion, which is a continuous portion having a unit length along the first direction, is provided on the film 1. It is. That is, as shown in FIG. 6 (b), the first unit load a is one first unit continuous part when the first unit continuous part (= uncut part) is provided along the MD of the film 1. And the maximum tensile load per unit length (= 1 mm), and the unit is N / mm.
The second unit load b is the second unit continuous when the second unit continuous part, which is a continuous part of the unit length along the second direction orthogonal to the first direction, is provided on the film 1. It is the maximum tensile load in the part. That is, as shown in FIG. 6 (c), the second unit load b is one second unit continuous part when the second unit continuous part (= uncut part) is provided along the TD of the film 1. And the maximum tensile load per unit length (= 1 mm), and the unit is N / mm.
The first unit load a and the second unit load b are [3. As described in the section of “Setting of first unit load a and second unit load b”], it is obtained in advance by actual measurement. The first unit load a and the second unit load b are values that depend on the material, thickness dimension, density, stretching direction, stretching ratio, and the like of the film 1.

  Further, as shown in FIG. 7A, when the continuous portion 15b having a unit length (= 1 mm) taking an angle θi with respect to the MD is set, the tensile load value of the continuous portion 15b (normalized to a load per 1 mm) is set. The first unit load a (maximum tensile load in unit length along MD) based on actual measurement and analysis from the decomposed component, respectively, is decomposed into a component along MD and a component along TD. And the second unit load b (the maximum tensile load in the unit length along the TD), the maximum tensile loads along the MD and TD are respectively obtained and synthesized to obtain the maximum tensile force of each continuous portion 15b. Each of the loads ci is calculated.

In the example of FIG. 3, when a tensile load is applied by the action of the arm portion 61 or its own weight, a tensile load is generated in each continuous portion 15b in the direction indicated by the white arrow in FIG. That is, among the continuous portions 15b, the continuous portions 15b ₁ , 15b ₂ , 15b ₄ and 15b ₅ extending along the MD are subjected to a tensile load along the TD, and the continuous portions 15b extending along the TD. ₃ , 15b ₆ is subjected to a tensile load along the MD.
Further, as shown in FIG. 4, even when the cutoff line 15 is a curve, the continuous portion 15b is a straight line connecting the cut portions 15a, and the above formula is used by using the length dimension di and the angle θi with respect to the MD. The maximum tensile load ci is calculated from [1].

  As a calculation method of the maximum tensile load normalized to the unit length in the continuous portion 15b, specifically, as shown in FIG. 10, the MD of the film is expressed in the x-axis direction, the film in the x, y orthogonal coordinate system. Is placed in the y-axis direction, and a vector of the length dimension ci is placed from the origin toward the point F (x, y) on the line of the angle θi counterclockwise from the x-axis. In the same coordinate system, x = a when θi = 0 °, and y = b when θi = 90 °.

に上記式（１）を代入して変形すると式（３）が得られる。

式（１）に式（３）を代入して式（４）が得られる。

ここで、単位長さに規格化された最大引張荷重は原点から座標Ｆ（ｘ、ｙ）までの距離であるから、式（５）である。

式（５）に式（３）および式（４）を代入すると式（６）が得られる。

これまで単位長さに規格化された連続部１５ｂにおける最大引張荷重を算出したが、実施例によると連続部１５ｂにおける最大引張荷重ｃｉは連続部１５ｂの長さ寸法ｄｉに比例することから、最終的に上式［１］が求まる。

Alternatively, tan θi = y / x may be written. If this is transformed, y = xtanθi (1)
It becomes.
According to the examples described later, the trajectory of F (x, y) can be approximated to an ellipse having a major axis length dimension of 2a and a minor axis length dimension of 2b. So the following elliptic equation

Substituting the above equation (1) into and transforming, equation (3) is obtained.

By substituting equation (3) into equation (1), equation (4) is obtained.

Here, since the maximum tensile load normalized to the unit length is the distance from the origin to the coordinates F (x, y), it is expressed by Equation (5).

When Expression (3) and Expression (4) are substituted into Expression (5), Expression (6) is obtained.

The maximum tensile load in the continuous portion 15b that has been standardized to the unit length has been calculated so far, but according to the embodiment, the maximum tensile load ci in the continuous portion 15b is proportional to the length dimension di of the continuous portion 15b. Thus, the above equation [1] is obtained.

  In addition, when the length dimension di of each continuous part 15b is too large, when the label 11 is cut off from the film 1, a deformed part is likely to be generated on the outer periphery of the label 11, so that it is preferably 5 mm or less, more preferably 2.5 mm. Hereinafter, it is further preferably 1.2 mm or less, and the maximum tensile load ci is preferably 2.0 N or less, more preferably 1.0 N or less.

The following causes can be considered as the reason why the deformed portion is generated on the outer periphery of the label.
As shown in FIG. 4, the maximum tensile load ci is applied to the connecting portion between the continuous portion 15b having the length dimension di and the discontinuous portion (cutting portion) 15a in contact with the continuous portion 15b, and the continuous portion 15b is broken. The label is cut out. However, if the tensile strength of the label along the TD is significantly lower than the tensile strength of the label along the MD, the label breaks so as to tear along the TD, not the direction of the continuous portion 15b (ie, the angle θi). Easy to progress. In particular, when the maximum tensile load ci becomes twice or more the tensile strength (second unit load b) of the label along TD, breakage along TD is likely to occur, and a deformed portion is likely to occur. Since the maximum tensile load ci is proportional to the length dimension di of the continuous portion 15b as described above, the occurrence of the deformed portion can be suppressed by reducing the length dimension di.

  On the other hand, if the length dimension di of each continuous portion 15b is too small, the maximum tensile load ci becomes small and the continuous portion 15b may be easily cut. Therefore, the length dimension di of the continuous portion 15b is preferably 0. 0.3 mm or more, more preferably 0.4 mm or more, further preferably 0.5 mm or more, and the maximum tensile load ci is preferably 0.18 N or more, more preferably 0.2 N or more, further preferably 0.3 N or more. is there.

Further, as shown in FIG. 5, among the polygons defined by connecting the midpoints C of the continuous portions 15b of the label 11 with straight lines, the polygons with the maximum area shown with halftone dots (in other words, Then, the polygon along the virtual contour line of the label 11 formed by the cutting part 15a and the continuous part 15b) is selected as the reference polygon 16, and the center of gravity CG of the label 11 is located within the reference polygon 16. In this way, the arrangement of the continuous portions 15b is set.
Thereby, the arrangement of the continuous portion 15b with respect to the label 11 can be set to a well-balanced position without bias.
Note that the triangle connecting the middle point C indicated by the two-dot chain line in FIG. 5 with a straight line does not have the maximum area, and therefore does not become a reference polygon.

  If the cut line 15 can be set so that the cut load Pr (the total value of the maximum tensile loads ci of all the continuous parts 15b) falls within a predetermined range, the length dimension di of each continuous part 15b included in the cut line 15 is the same. Or they may be different from each other.

Preferred settings for the cutoff line 15 include the following settings (1) to (4).
First, a cut region (hereinafter also referred to as a “second cut region”) surrounded by a cut line in which cut portions and continuous portions are alternately arranged in a film having the same material, thickness dimension, density, drawing direction, and draw ratio as the film 1. ) Is assumed to be a cut line setting sheet. And the maximum tensile load ci (N) of each continuous part in the sheet | seat for cutoff line setting is calculated | required by said Formula [1]. Although the setting of the cut line in the cut line setting sheet is not particularly limited, it is preferable that the lengths of the continuous portions are all the same, and it is more preferable that the continuous portions of the same length are arranged at equal intervals. By using such a cut line setting sheet, it becomes easy to set the cut line 15 having an excellent balance of the arrangement of the continuous portions 15b in the film 1. And according to the cutoff line 15 set in this way, adjustment of the cutoff load Pr is easy.

[1-1. Setting (1)]
Of the maximum tensile load ci (N) of each continuous portion in the cutting line setting sheet, the continuous portion having the minimum value is defined as a continuous portion min. Then, corresponding to the second cut area, a cut area (hereinafter, also referred to as “first cut area”) surrounded by the cut lines 15 in which the cut portions 15 a and the continuous portions 15 b are alternately arranged is arranged on the film 1. . However, when arranging the first cutout region, the continuous portion 15b is not formed at a position corresponding to the continuous portion min. That is, except for the presence or absence of the continuous portion min, the cut line 15 surrounding the first cut area and the cut line surrounding the second cut area are the same. In other words, the continuous part 15b is not provided at a position corresponding to the continuous part min in the second cut area in the first cut area.
The continuous portion min where the maximum tensile load ci is the minimum value tends to be cut more easily than other continuous portions. For this reason, the continuous portion min that is easily cut is cut in advance, and the cut portion 15a is formed in the first cut region. According to the cut line 15 set in this way, the label 11 is held by a relatively small number of continuous portions 15b. Therefore, the label 11 can be easily cut when a predetermined tensile load is applied to the label 11. . Moreover, since each continuous part 15b has a certain amount of maximum tensile load ci, it is hard to be cut | disconnected by the tension | tensile_strength in a printing process or a conveyance process, and the drop-off of the label 11 is prevented. Furthermore, since the number of continuous portions 15b is relatively small, it is possible to suppress the occurrence of beard-like or burr-like deformed portions.

Further, in the film 1, a first cut area is formed by rotating each continuous part included in the cut line constituting the second cut area by a predetermined angle so that the continuous part 15b is not formed at a position corresponding to the continuous part min. May be. Since the maximum tensile load ci of the continuous portion 15b in the first cut region is adjusted by the angle θi with respect to the MD of the continuous portion 15b, the first cut region rotated by a predetermined angle with respect to the second cut region is disposed. Thus, the minimum continuous portion min can be eliminated, and the maximum tensile load ci in each continuous portion 15b can be averaged. As a result, the continuous portions 15b are not easily cut by the tension in the printing process or the conveyance process, and the label 11 can be prevented from falling off and tearing of the label 11 in different directions can be suppressed. Moreover, generation | occurrence | production of a deformed part can also be suppressed.
In addition, although the rotation angle of each continuous part may be the same or may mutually differ, it is preferable that the rotation angle of all the continuous parts is the same from a viewpoint that adjustment of the cutting load Pr is easy.

[1-2. Setting (2)]
In setting (2), in the film 1, in the second cut region, the length dimension di of the continuous part 15b at the position corresponding to the continuous part min is larger than the length dimension di of the other continuous part 15b. Correspondingly, the cutting line 15 is set, and the first cutting area is arranged. That is, except for the length dimension di of the continuous portion 15b at the position corresponding to the continuous portion min, the cut line 15 surrounding the first cut region and the cut line surrounding the second cut region are the same.
The maximum tensile load ci is proportional to the length dimension di of the continuous portion 15b. In the film 1, the length dimension di of the continuous part 15b arranged at the position corresponding to the continuous part min is made larger than the length dimension di of the other continuous part 15b, so that the position corresponding to the continuous part min. The continuous portion 15b is less likely to be cut. That is, in the first cutout region, the maximum tensile load ci at each continuous portion 15b is averaged. Therefore, the entire circumference of the cut line 15 can be cut almost simultaneously, so that the label 11 can be cut easily and the label 11 can be cut cleanly along the cut line 15. Further, the continuous portions 15b are not easily cut by the tension in the printing process or the conveyance process, and the label 11 is prevented from falling off.

[1-3. Setting (3)]
Of the maximum tensile load ci (N) of each continuous portion in the cutting line setting sheet, the continuous portion having the maximum value is defined as a continuous portion max. Then, the first cut area is arranged on the film 1 so as to correspond to the second cut area. However, when the first cutout region is arranged, the continuous portion 15b is not formed at a position corresponding to the continuous portion max. That is, except for the presence or absence of the continuous portion max, the cut line 15 that surrounds the first cut area and the cut line that surrounds the second cut area are the same. In other words, the continuous portion 15b is not provided at a position corresponding to the continuous portion max in the second cut region in the first cut region.
In the continuous portion max where the maximum tensile load ci is the maximum value, it is not the direction of the continuous portion 15b (that is, the angle θi) due to the difference between the tensile strength along the TD of the label 11 and the tensile strength along the MD. The label 11 may be broken in the direction in which the tensile strength is small. The breakage of the label 11 in such an unintended direction, that is, the occurrence of tearing of the label 11 in a different direction causes a deformed portion on the outer periphery of the label 11. Therefore, the continuous portion max where the maximum tensile load ci is maximized is cut in advance, and the cut portion 15a is used in the first cut region, thereby suppressing the occurrence of tearing in the opposite direction in the label 11 and the occurrence of the deformed portion. it can.

[1-4. Setting (4)]
In setting (4), in the film 1, in the second cut region, the length dimension di of the continuous part 15b at the position corresponding to the continuous part max is smaller than the length dimension di of the other continuous part 15b. Correspondingly, the cutting line 15 is set, and the first cutting area is arranged. In other words, except for the length dimension di of the continuous portion 15b at the position corresponding to the continuous portion max, the cut line 15 surrounding the first cut region and the cut line surrounding the second cut region are the same.
The continuous portion max where the maximum tensile load ci is maximum tends to be less likely to be cut than other continuous portions. In the film 1, the length dimension di of the continuous part 15b arranged at the position corresponding to the continuous part max is made smaller than the length dimension di of the other continuous parts 15b, so that the position corresponding to the continuous part max. The continuous portion 15b is easily cut. That is, in the first cutout region, the maximum tensile load ci in each continuous portion 15b is averaged. Therefore, the entire circumference of the cut line 15 can be cut almost simultaneously, so that the label 11 can be cut easily and the label 11 can be cut cleanly along the cut line 15. Further, the continuous portions 15b are not easily cut by the tension in the printing process or the conveyance process, and the label 11 is prevented from falling off. Furthermore, the occurrence of irregular portions on the outer periphery of the label 11 is also suppressed.

  Note that the cutoff line 15 can be set by combining either the setting (1) or (2) and either the setting (3) or (4).

  The manufacturing method of the film 1 is not particularly limited as long as the cutoff line 15 is set so that the cutoff load Pr (the total value of the maximum tensile loads ci of all the continuous portions 15b) falls within a predetermined range.

[2. effect]
According to one embodiment of the present invention, the following effects can be obtained.
Based on the above equations [1] and [2], the cutting load Pr of the label 11 can be obtained with high accuracy. Then, based on the calculated cutting load Pr, the label 11 can be surely taken out from the film 1 by the arm portion 61, and the label 11 is unintentionally detached from the film 1 due to the tension during transportation. The distribution of the cut portion 15a and the continuous portion 15b in the cutoff line 15 can be set.
Since each continuous part 15b is arranged so that the center of gravity of the label 11 is within the reference polygon 16, the position of the continuous part 15b with respect to the label 11 can be set to a well-balanced position. Therefore, when the label 11 is pulled by the arm portion 61, it can be cut cleanly along the cut line 15.

[3. Setting of first unit load a and second unit load b]
6A, 6B and 6C are set to the test apparatus 100 shown in FIGS. 6A, 6B, and 6C as a test piece made of the same material as the target sheet, and the load test is performed. Based on the results, the first unit load a and the second unit load b of the above equation [1] were set. The films 1A and 1B are provided with tear lines 15A and 15B each having a cut portion 15a and a continuous portion 15b along the contour shapes of the labels 11A and 11B.
Here, the cut lines 15A and 15B are rounded, but if the cut parts 15a and the continuous parts 15b are provided so that only two continuous parts 15b are loaded in the load test, the cut lines 15A and 15B are provided. , 15B is not particularly limited in shape.

In addition, although the individual length dimensions of the continuous portion 15b are arbitrary, the first unit load a and the second unit load b are obtained by standardizing the load acting on the continuous portion 15b in the load test to a load per 1 mm. From the viewpoint of reducing the error, the individual length dimension of the continuous portion 15b is particularly preferably 0.8 to 1.2 mm. In the case of the label 11A shown in FIG. 6B, the angle of the continuous portion 15b is preferably as parallel as possible to the MD of the film 1A, and is within ± 0.5 ° (degree) with respect to the MD. Preferably there is. In the case of the label 11B shown in FIG. 6C, the angle of the continuous portion 15b is preferably as parallel as possible to the TD of the film 1B, and is preferably within ± 0.5 ° (degree) with respect to the TD. .
In addition, the length dimension of the continuous part 15b is prescribed | regulated as the length dimension of the line segment which connected the edge part of the cutting part 15a which pinches | interposes the continuous part 15b, and the angle of the continuous part 15b is defined as the angle of the line segment. It is prescribed.

In the test apparatus 100, as shown in FIG. 6A, the films 1A and 1B are attached to the pedestal 102 with the adhesive tape 101, and the labels 11A and 11B of the films 1A and 1B are fixed to the grip portion 103. The labels 11A and 11B are cut off from the films 1A and 1B by pulling upwards by a tensile tester (not shown) through the grip portion 103.
The method of fixing the labels 11A and 11B to the tensile tester is not limited to the method of fixing to the grip portion 103, and various methods can be used. For example, a method of fixing with an adhesive can also be used.
The tensile load (that is, the maximum tensile load) when the labels 11A and 11B are cut from the films 1A and 1B is defined as the cut load Pr of the labels 11A and 11B, and this is the number of continuous portions 15b (in this case, two). What was divided was made into the maximum tensile load ci of each continuous part 15b. The number of continuous portions 15b is most preferably two, but may be one or three or more.

As shown in FIG. 6B, the cut line 15A of the film 1A is provided with a continuous portion 15b on each long side of the label 11A, and is indicated by a white arrow when pulled upward by the tensile tester. Thus, a tensile load acts along TD. As shown in FIG. 6 (c), a continuous portion 15b is provided on each short side of the label 11B on the cut line 15B of the film 1B, and a tensile load acts along the MD.
If the force acts so as to cut off the labels 11A and 11B perpendicularly to the surfaces of the films 1A and 1B, the labels 11A and 11B can be cut from the films 1A and 1B by pushing downward. Moreover, it is not necessary to arrange | position the film 1A, 1B horizontally.
The tension (or push-in) speed of the load test is most preferably the same as the immersion drive speed of the arm part (extraction device) 61 (see FIG. 3), but is usually 10 to 500 m / min.

The specifications of the films 1A and 1B other than the arrangement of the cut line 15B are the same, and the main specifications are as shown in Table 1 below.

Table 2 below shows (1) the maximum tensile load ci of the continuous portion 15b measured by the test and (2) the state of the cut portion when the labels 11A and 11B are cut. The state of the cut-out portion is “X” when the deformed portion is visually confirmed, and “◯” when the deformed portion is not confirmed.

The first unit load a is 1.5 N / mm because it is the maximum tensile load ci in the continuous portion 15b having a unit length (= 1 mm) along the MD. The second unit load b is 0.6 N / mm because it is the maximum tensile load ci in the continuous portion 15b having a unit length (= 1 mm) along TD.
Moreover, when the continuous part 15b exceeds 5 mm, since the deformed part was confirmed in the cut part, as described above, the length of the continuous part 15b is preferably 5 mm or less.

7A and 7B, the curves L1 and L2 are calculated by the above equation [1] using 1.5 N / mm for the first unit load a and 0.6 N / mm for the second unit load b. The calculated values are the dots, and the dots are actually measured values.
FIG. 7A is a graph in which the horizontal axis is the tensile load of TD and the vertical axis is the tensile load of MD, and the tensile load that acts on the continuous portion 15b when the continuous portion 15b is cut off (in detail, The tensile load acting in the direction orthogonal to the direction in which the continuous portion 15b extends is shown in an exploded manner as an MD component and a TD component. θ1 to θ6 correspond to the angle θi with respect to MD, and become larger in this order. θ1 is 0 (zero) degrees, that is, an angle along MD, and θ6 is 90 degrees, that is, an angle along TD.
7B, the horizontal axis is the angle θi with respect to MD, and the vertical axis is the tensile load (specifically, the direction in which the continuous portion 15b extends) applied to the continuous portion 15b when the continuous portion 15b is cut off. It is the graph made into the tensile load which acted in the orthogonal direction.
7A and 7B, it can be seen that the calculated value accurately reproduces the actual measurement value.

[4. Labeled container]
Below, the labeled container using the label 10 cut out from the film 1 and the manufacturing apparatus of a labeled container are demonstrated. In the present embodiment, upstream and downstream are defined based on the manufacturing process of the labeled container, and the direction of gravity is defined as downward, and the opposite direction is defined as upward.
As shown in FIG. 1, the labeled container is a hollow container 2 in which a label 10 is adhered to the outer wall 2a. In this labeled container, the label 10 is stuck to the container 2 by in-mold labeling (in-mold molding).
Here, the some label 10 (label group) is stuck on the outer wall 2a of the container 2 by the side view. Furthermore, the label 10 before being attached to the container 2 has a heat seal layer 1a (see FIG. 3) in advance on the back surface (attachment surface).

In FIG. 1, a label 10 including a pair of a first label 11 and a second label 12 is illustrated on the outer wall 2 a on the front side of the container 2.
The labels 11 and 12 are formed in different shapes. Here, the substantially rectangular first label 11 is illustrated, and the triangular second label 12 is illustrated.

[5. manufacturing device]
Next, an apparatus for manufacturing a labeled container according to an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 2, the manufacturing apparatus is roughly divided into three mechanisms, namely, a feeding mechanism 20, a transport mechanism 50, and a forming mechanism 90 provided from upstream to downstream.

The feeding mechanism 20 feeds the film 1 on which the labels 10 are arranged, and the transport mechanism 50 transports the label 10 from the fed film 1 until it is placed in the mold 91. The molding mechanism 90 supplies the molding material into the mold 91, and sticks the label 10 disposed inside the mold 91 to the outer wall 2a (see FIG. 1) to mold the container 2.
Here, before the film 1 is disposed in the manufacturing apparatus, the design of the label 10 is printed on the film 1 in advance.

The transport mechanism 50 holds the transported label 10 separately from the film 1, and also charges the transported label 10 inside the mold 91 and the label 10 being transported. Part 80.
The mold 91 is composed of two split molds 91a and 91b. The first split mold 91a is arranged on one side of the apparatus (upward in FIG. 2) and the second split mold on the other side (lower in FIG. 2). A mold 91b is arranged.

Therefore, the manufacturing apparatus is provided symmetrically in the horizontal direction (vertical symmetry in FIG. 2), and two manufacturing processes can be performed simultaneously. Specifically, the label 10 attached to the outer wall 2a on the front side of the container 2 is handled on one side of the apparatus, and at the same time, the label attached to the outer wall on the back side of the container 2 is handled on the other side of the apparatus. it can.
Here, a manufacturing apparatus that is provided with two sets of molds 91 and simultaneously molds two labeled containers is illustrated.
In the following description, description will be given mainly focusing on one side of the apparatus.

[5-1. Feeding mechanism]
First, the configuration related to the feeding mechanism 20 will be described.
The feeding mechanism 20 is a mechanism that feeds the label 10 to a predetermined position by feeding the film 1. The feeding mechanism 20 is provided with two rotating shafts 21 and 22. Of these rotary shafts 21 and 22, the first rotary shaft 21 arranged on the upstream side is drawn out from the state in which the film 1 before the label 10 is separated is wound, and the second rotary shaft arranged on the downstream side. On the rotating shaft 22, the film 1 (remaining part) after the label 10 is separated is taken up.

[5-2. Transport mechanism]
Next, a configuration related to the conveyance of the conveyance mechanism 50 will be described.
In the transport mechanism 50, the chassis 52 moves horizontally on the slide along the slide rail 51 that extends across the feeding mechanism 20 and the forming mechanism 90.

Here, in the horizontal direction, a direction in which the slide rail 51 extends is referred to as an “X direction” (left and right direction in FIG. 2), and a direction orthogonal to the X direction is referred to as a “Y direction” (up and down direction in FIG. 2). Further, one of the X directions (left side in FIG. 2) is “X1” and the other is “X2”, and one of the Y directions (upward in FIG. 2) is “Y1” and the other is “Y2”. " On the Y1 direction side of the manufacturing apparatus, a slide rail 51 and a chassis part 52 are provided on the Y2 direction side of the film 1 and the first split mold 91a. On the contrary, on the Y2 direction side of the manufacturing apparatus, the slide rail 51 and the chassis 52 are provided on the Y1 direction side of the film 1 and the second split mold 91b.
The chassis 52 on the slide rail 51 has an origin position P1 for separating the label 10 from the X1 direction to the X2 direction, a charging position P3 for charging the label 10 by the charging unit 80, and the label 10 for the first split mold 91a. To the respective positions arranged in the order of the molding position P4 for molding the container 2.

  The chassis portion 52 is provided with the arm portion 60 described above. The arm unit 60 is driven in the Y direction so as to expand and contract. Specifically, an insertion / extraction position where the tip end portion 60a of the arm portion 60 protrudes so as to contact the film 1 or the first split die 91a, and conveyance where the tip end portion 60a is separated from the film 1 or the first split die 91a. The arm portion 60 is driven in and out (reciprocating drive) from the chassis portion 52 so as to switch between the two positions. Furthermore, a suction mechanism (suction cup) that sucks the label 10 is provided at the distal end portion 60 a of the arm portion 60.

Here, the two labels 10 are separated simultaneously. Therefore, two sets of arm portions 60 are provided side by side in the X direction corresponding to each of the two labels 10. Furthermore, since one label 10 is provided with two labels 11, 12, the set of arm portions 60 corresponds to the first arm portion 61 corresponding to the first label 11 and the second label 12. And a second arm portion 62 is provided. In other words, a number of arm portions 61 and 62 corresponding to the number of labels 11 and 12 in one label 10 are provided in the chassis portion 52.
Next, the transport mechanism 50 when the chassis unit 52 is located at each of the positions P1, P3, and P4 will be described in order.

<Taking part>
Hereinafter, the label 11 and the arm part 61 will be described with particular attention with reference to FIGS.
As shown in FIG. 2, when the chassis part 52 is located at the origin position P 1, the arm part 61 of the chassis part 52 separates and removes the label 11 from the film 1. The chassis section 52 at this time is stopped at the origin position P1.
As shown in FIG. 3, the arm portion 61 is driven to project from the transport position to the insertion / extraction position, and the tip end portion 60 a contacts the label 11. Then, the suction mechanism is activated and the label 11 is sucked to the distal end portion 60a. Thereafter, as indicated by an arrow A1, the arm unit (extraction device) 61 is driven into the transport position from the insertion / extraction position. At this time, the label 11 sucked to the tip end portion 60 a is pulled from the film 1 and separated from the film 1. At the time of the separation, the portion connecting the label 11 and the blank portion 13, that is, the continuous portion 15 b forming the cutting line 15 is torn off. In the film 1 of the present embodiment, since the cut line 15 is set as described above, the label 11 is separated from the film 1 with an appropriate stress, and the label 11 can be taken out along the cut line 1 cleanly. The production efficiency of the label 11 is excellent.

<Charging part>
After the label 10 is placed inside the mold 91, it is necessary to prevent the label 10 from moving in the mold 91. Here, the label 10 is charged. That is, as shown in FIG. 2, when the chassis unit 52 is positioned at the charging position P <b> 3, the label 10 being transported held by the arm unit 60 passes in the vicinity of the charging unit 80. Thereby, even after the label 10 is charged and disposed in the first split mold 91a, the label 10 is stuck to the first split mold 91a by the Coulomb force and the position is maintained. If the method of fixing the label in the mold is a method that does not depend on charging such as vacuum suction, the charging unit may not be provided.

<Arrangement section>
When the chassis part 52 is located at the molding position P4, the arm part 60 of the chassis part 52 arranges the label 10 inside the first split mold 91a. The chassis section 52 at this time is stopped at the molding position P4 so as to face the inside of the first split mold 91a. The arm part 60 is driven to project from the transport position to the insertion / extraction position, and the label 10 held at the tip part 60a is inserted into the first split mold 91a and pressed.

Thereafter, the arm portion 60 is driven into the transport position from the insertion / extraction position, and the chassis portion 52 moves to the origin position P1.
In addition, when the label 10 is arrange | positioned at the 1st split mold 91a, the drawing | feeding-out mechanism 20 will draw | feed out the film 1 again, and the label 10 will be paid out by two.

[5-3. Molding mechanism]
Next, the forming mechanism 90 will be described with reference to FIG.
The molding mechanism 90 supplies the molding material into the mold 91 and attaches the label 10 to the outer wall 2a by in-mold labeling, thereby molding the container 2 in-mold.

Similar to the two sets of arm portions 60, two sets of molds 91 are arranged in the molding mechanism 90 side by side in the X direction. Furthermore, since each set of molds 91 is composed of split molds 91a and 91b divided in the Y direction, a slide rail 92 extending in the Y direction is laid so as to connect the split molds 91a and 91b. Along the slide rail 92, the split molds 91a and 91b come in contact with and separate from each other.
Further, at the center of the molding mechanism 90 in the Y direction, a supply port 93 for supplying a molten pipe-shaped molding material (plastic raw material, so-called “parison” or “preform”) to the mold 91, and a mold when the mold is closed. Air is blown into the mold 91 and an air inlet 94 is provided.

The labeled container is formed by the following procedure.
A molding material is introduced into the split molds 91a and 91b from the supply port 93, the split molds 91a and 91b are brought close to each other, and the mold is closed to perform blow molding. Then, the cooled split molds 91a and 91b are separated from each other and opened, and the molded labeled container is taken out.

[6. Example]
A rotary die cutter having a blade having a height of 0.25 mm and an angle of 50 ° was produced. On the cylinder surface of the rotary die cutter, there are punching dies whose lengths of each continuous part are 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.7 mm, 1.5 mm and 2.0 mm, respectively. One by one. As shown in FIG. 8, the punching die 104 has a circular shape with a diameter of 70 mm (diameter DS along the MD = 70 mm, diameter DL along the TD = 70 mm). The punching die 104 is arranged so that the diameter DS is along the MD and the diameter DL is along the TD of the film 1C when the film 1C is punched. In FIG. 8, the punching die 104 is indicated by a single continuous line for convenience.
Locations corresponding to the continuous portion of the punching die 104 (that is, locations where no blade is installed) are obtained by drawing 12 auxiliary lines H1 to H12 (shown by broken lines) radially every 30 ° from the center of the circle. The auxiliary lines H1 to H12 are provided so that the midpoints are 12 points where the auxiliary lines H1 to H12 intersect the circle. The location number of the continuous part (hereinafter referred to as “location number”) n is the location where the most upstream side diameter DS intersects with the upstream side of the film on the right and the downstream side on the left. No. 12 was counterclockwise.

  A film 1C having the same specifications as the above films 1A and 1B (refer to the material in Table 1, film thickness t, film length Lf and film width Wf) is passed through this rotary die cutter, and Examples 1 to 7 are shown in Table 3 below. And the sheet-like thing containing the label of the comparative example 1 was created. In Examples 8 to 12 and Comparative Example 2, the label was formed using YUPO IHC75 [manufactured by YUPO CORPORATION, film thickness t: 75 μm, film length Lf: 100 m, film width Wf: 150 mm]. A sheet-like material was prepared. Further, in Example 13, a sheet-like material including a label is prepared using YUPO IDS80 [manufactured by YUPO Corporation, film thickness t: 80 μm, film length Lf: 100 m, film width Wf: 150 mm] as a film. did.

In Examples 1 to 7 and Comparative Example 1 in Table 3 below, the values determined above for the first unit load a and the second unit load b (a = 1.5 N / mm, b = 0.6 N / mm) are used. used.
In Examples 8 to 13 and Comparative Example 2, the first unit load a and the second unit load b were determined by the same method as described above. Specifically, the first unit load a in Examples 8 to 12 and Comparative Example 2 was 3.45 N / mm, and the second unit load b was 0.5 N / mm. The first unit load a in Example 13 was 2.35 N / mm, and the second unit load b was 0.56 N / mm.

Tables 3 and 4 below show the angle θn with respect to the MD at the location number n, the length dimension dn of the continuous part, the maximum tensile load cn of the continuous part calculated from the above equations [1] and [2], and the cutting load Pr (= Σcn) and each evaluation (label dropout, continuous part breakage, suction take-off property, label tearing in different directions and deformed part).
In Table 3 below, “-” is entered to indicate that a continuous part is not provided at the corresponding place number n (that is, a cutting part is provided).
That is, in Example 5, a continuous part is provided in the 1st, 3rd, 5th-9th, 11th and 12th by the place number n, and in Example 6, a continuous part is 2-6th, 8- No. 12 is provided. Moreover, in the comparative example 1, the continuous part is provided in 2, 4, 6, 8, 10, 12th.
In Example 7, the lengths d4 and d10 of the continuous part (location number n is No. 4 and No. 10) where the maximum tensile load ci was the minimum in Example 1 were 0.4 mm, and the lengths of the other continuous parts It is larger than the size (0.3 mm).
In Example 9, the continuous part was not provided in the place numbers 4 and 10 where the maximum tensile load ci was the minimum in Example 8.
In Example 10, each continuous portion in Example 8 was rotated 15 ° clockwise.
In Example 11, the continuous part was not provided in the place numbers 1 and 7 where the maximum tensile load ci was the maximum in Example 8.
In Example 12, the length dimension of all the continuous parts in Example 10 was changed from 0.4 mm to 2.0 mm.
Since the maximum tensile load ci tends to increase in the continuous part 15b arranged at the end of the MD, that is, the continuous part 15b of the place number 1 and the seventh place, in Example 13, the place number 1 and The length dimension of the 7th continuous part 15b was made smaller than the length dimension of the other continuous parts.
Moreover, in the comparative example 2, the length dimension of all the continuous parts in Example 8 was changed from 0.4 mm to 2.0 mm.
Note that the angle θn in Table 3 below is an angle where the place number 1 is 0 [zero] degrees, and is an angle of the auxiliary lines H1 to H12 with respect to the MD (in other words, an angle indicating the installation location of the continuous portion). It is not the angle θi with respect to the MD of the continuous part. For example, the angle θi of the continuous portions of the location numbers 1 and 7 is 90 °, and the angle θi of the continuous portions of the location numbers 4 and 10 is 0 °. Further, in this embodiment, a circular label is used so that it is easy to imagine that the continuous portion is rotated clockwise, but the shape of the label is not particularly limited, and may be an ellipse, a rectangle, or an indefinite shape. it is obvious.

[Label transport process evaluation]
(Label dropout)
When 1000 sheets of labels were printed on a punching label with a seal printer (manufactured by Taiyo Machinery Co., Ltd.), the drop of the label due to tension was determined according to the following criteria.
○: There is no dropout of the label.
X: One or more labels were dropped.

(Continuous part fracture)
When 1000 labels were printed on a punching label with a seal printer (manufactured by Taiyo Machinery Co., Ltd.), the breakage of the label continuous portion due to tension was determined according to the following criteria.
(Double-circle): There is no cutting | disconnection of a continuous part at all.
A: The continuous part was cut at a frequency of 1 to 3, but did not fall off.
(Triangle | delta): Although the continuous part was cut | disconnected with the frequency of 4-10 sheets, it did not come off.
X: The continuous part was cut at a frequency exceeding 10 sheets.
-: The label was dropped.

[Labeling process evaluation]
(Suction take-off)
The presence or absence of a suction error (that is, cutting failure due to suction) when sucking with an automatic labeler (LIM4-001, manufactured by Machinemate Co., Ltd.) was determined according to the following criteria. The suction holes of the automatic labeler were rubber suction cups, the size of which was 9 mm in diameter, and two suction holes were set apart by 37 mm. The suction pullability evaluation was performed on at least 1000 labels.
A: There is no suction error.
○: A label suction error occurred at a frequency of 1 or less per 1000 labels.
(Triangle | delta): The label suction error generate | occur | produced with the frequency of more than 1 sheet per 1000 sheets and 2 sheets or less.
X: A label suction error occurred at a frequency exceeding 2 per 1000 labels.

(Tear in different directions)
Arbitrary 100 sheets were extracted from the samples subjected to the suction pullability evaluation, and the determination was made as follows based on the frequency of occurrence of tearing in different directions extending along the MD or CD of the sheet from the continuous part.
A: Less than 5 tears in different directions.
○: 5 or more and less than 10 tears in different directions.
Δ: Ten to less than 20 tears in different directions.
X: 20 or more tears in different directions or a sheet-like material was broken.

(Deformed part)
Arbitrary 10 sheets were extracted from the samples subjected to the suction pullability evaluation, and the fracture state of the continuous part was observed visually.
A: Less than 5 bearded or burr shaped deformed parts.
◯: There are 5 or more and less than 10 bearded or burr-shaped deformed parts.
Δ: There are 10 or more and less than 20 bearded or burr-shaped deformed parts.
X: There are 20 or more deformed parts such as mustaches or burrs.

From Examples 1 to 4, it can be seen that when the length dimension di of the continuous portion is increased, dropping of the label due to the tension applied to the label during printing or the like is suppressed. On the other hand, if the length dimension di of the continuous portion is too large, the maximum tensile load ci becomes too high, and the label is liable to tear in an unexpected direction. It becomes easy to happen. Further, as can be seen from the fifth embodiment for the first embodiment and the ninth and tenth embodiments for the eighth embodiment, as shown in FIG. 9, the angle θn is the horizontal axis and the maximum tensile load ci is the vertical axis. When the graph of the calculated value by the above formula [1] (calculated value of Example 1 in FIG. 9) is drawn, the angle θn at which the maximum tensile load ci becomes the minimum value (in FIG. For No. 10), it is preferable to avoid providing a continuous portion. As can be seen from Example 7, it is also preferable to increase the length dimension di of the continuous portion where the maximum tensile load ci is the minimum value.
On the other hand, in Example 8, the angle (No. 1 and No. 7 in FIG. 9) at which the maximum tensile load ci becomes the maximum value tends to tear along the TD of the film, but the label shape tends to be poor. Then, the label shape could be improved by not providing the continuous part here.
Further, based on the results of Example 13 and Comparative Example 1, it can be seen that the cut load Pr should be 2N or more in order to suppress the label from dropping off. On the other hand, when the cut load Pr was set to 25 N or less as in Example 12, it was possible to suppress the occurrence of suction error and tearing in different directions when removing the label from the film.
Moreover, in the film used in each Example, when the maximum tensile load ci exceeded 0.18N, there was a tendency that the continuous portion was not easily broken.
In the thirteenth embodiment, the length dimension di of each continuous portion 15b is optimized based on the above knowledge.

  In Comparative Example 1, since the label dropped out in the label transport process, other evaluations could not be performed. Further, in Comparative Example 2, since the frequency of label suction errors was high, label shape evaluation (different direction tear evaluation and deformed portion evaluation) was not performed.

  Thus, when the label is removed from the film only by measuring the first unit load a and the second unit load b, the number of continuous portions that cause burrs (an irregular shape) is reduced, and the label is removed with a small force. Thus, it was possible to obtain a long film that is unlikely to come off unexpectedly due to the tension at the time of conveyance and that is unlikely to form a deformed portion on the outer periphery of the label.

[7. Others]
In the said embodiment, although the label 11 was isolate | separated and taken out by providing the cutting line 15 in the resin-made long film 1, this invention is not limited to this.
For example, as the shape of the sheet-like material, a short sheet may be used instead of the long one. In addition, the sheet-like material of the present invention includes not only a paper and a film that can be bent, but also a plate that has a relatively high rigidity and cannot be bent, and includes paper, metal foil, and plywood. Ceramic plates are also included.
In the above-described embodiment, the present invention has been described with reference to an example in which the present invention is applied to taking out a label. However, the present invention is not limited to taking out a label. It can also be applied to the one that takes out.
In short, the setting method of the cut line described in the present embodiment is applicable as long as cutting is performed using a cut line in which cut portions and continuous portions are alternately provided.

  Further, in the present embodiment, an example in which the label 11 is separated from the film 1 and taken out by the transport mechanism 50 has been described, but the method of taking out the label 11 is not particularly limited. For example, the label 11 may be sucked, and the film (the blank portion 13 in FIG. 3) at a portion other than the label 11 may be lifted.

1,1A, 1B, 1C film (sheet-like material)
10, 11, 11A, 11B, 12 Label (cutting area)
13 margin 15, 15A, 15B tear line 15a cuts _{15b, 15b 1, 15b 2,} 15b 3, 15b 4, 15b 5, 15b 6 consecutive unit 16 reference polygon 61 first arm portion (take-off)
62 Second arm part 100 Test apparatus 101 Adhesive tape 102 Base 103 Grab part 104 Punching die a First unit load b Second unit load di Length dimension of continuous part 15b C Midpoint of continuous part 15b CG Center of gravity of label 11 ci Maximum tensile load of the continuous portion 15b DL Diameter along the TD of the punching die 104 DS Diameter along the MD of the punching die 104 Parm Tensile load Pr Cutting load Pg Tensile load MD Longitudinal direction (first direction)
TD Short direction (second direction)
θi Angle of the continuous portion 15b with respect to the longitudinal direction (first direction) MD of the film 1

Claims (8)

In the sheet-like material having the first cut region surrounded by the cut line in which the cut portion and the continuous portion are alternately arranged,
The maximum tensile load ci (N) per one of the continuous parts is defined as a first unit load a (N / mm) measured in advance, a second unit load b (N / mm) measured in advance, and the continuous part Is obtained from the following formula [1] based on the length dimension di (mm) of the continuous portion and the angle θi (°) of the continuous portion with respect to the first direction in all the continuous portions of the first cutout region. When
The sheet-like product, wherein a total value Σci of the maximum tensile loads ci (N) of all the continuous portions is 2 to 25 (N).

There are three or more continuous parts,
When a polygon having the largest area among the polygons defined by connecting the midpoints of the three or more continuous parts with a straight line is selected as a reference polygon,
The sheet-like object according to claim 1, wherein the center of gravity of the first cutout region is located within the reference polygon. A long film extending in the first direction;
The sheet-like object according to claim 1 or 2, wherein a plurality of labels as the first cut-out area are arranged along the first direction. In the cut line setting sheet corresponding to the first cut area and having a second cut area surrounded by cut lines in which cut parts and continuous parts are alternately arranged, the maximum tensile load ci (N) per continuous part ) Is obtained from the equation [1] in all the continuous portions of the second cut region, and the continuous portion having the minimum value among the maximum tensile loads ci (N) is defined as a continuous portion min. sometimes,
The sheet-like object according to any one of claims 1 to 3, wherein the continuous part is not provided at a position corresponding to the continuous part min in the first cut region. In the cut line setting sheet corresponding to the first cut area and having a second cut area surrounded by cut lines in which cut parts and continuous parts are alternately arranged, the maximum tensile load ci (N) per continuous part ) Is obtained from the equation [1] in all the continuous portions of the second cut region, and the continuous portion having the minimum value among the maximum tensile loads ci (N) is defined as a continuous portion min. sometimes,
The sheet according to any one of claims 1 to 3, wherein in the first cut region, a length dimension of a continuous part at a position corresponding to the continuous part min is larger than a length dimension of other continuous parts. State. In the cut line setting sheet corresponding to the first cut area and having a second cut area surrounded by cut lines in which cut parts and continuous parts are alternately arranged, the maximum tensile load ci (N) per continuous part ) Is obtained from the equation [1] in all the continuous portions of the second cut region, and the continuous portion having the maximum value among the maximum tensile loads ci (N) is defined as a continuous portion max. sometimes,
The sheet-like object according to any one of claims 1 to 5, wherein the continuous portion is not provided at a position corresponding to the continuous portion max in the first cut region. In the cut line setting sheet corresponding to the first cut area and having a second cut area surrounded by cut lines in which cut parts and continuous parts are alternately arranged, the maximum tensile load ci (N) per continuous part ) Is obtained from the equation [1] in all the continuous portions of the second cut region, and the continuous portion having the maximum value among the maximum tensile loads ci (N) is defined as a continuous portion max. sometimes,
The sheet according to any one of claims 1 to 5, wherein, in the first cut region, a length dimension of a continuous part at a position corresponding to the continuous part max is smaller than a length dimension of other continuous parts. State. A method for producing a sheet-like material having a first cut region surrounded by a cut line in which cut portions and continuous portions are alternately arranged,
The maximum tensile load ci (N) per one of the continuous parts is defined as a first unit load a (N / mm) measured in advance, a second unit load b (N / mm) measured in advance, and the continuous part Is obtained from the following formula [1] based on the length dimension di (mm) of the continuous portion and the angle θi (°) of the continuous portion with respect to the first direction in all the continuous portions of the first cutout region. When
The method for producing a sheet-like product, wherein the cut line is arranged so that a total value Σci of the maximum tensile loads ci (N) of all the continuous portions is 2 to 25 (N).

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