JP2019026264A - Packaging material - Google Patents

Abstract

To provide a packaging material which can be easily cut by hand after packaging without being caught inside a packaging machine at the time of packaging.SOLUTION: A plurality of slits 2 extending in a shorter direction of a sheet 1 are provided at both end portions in the shorter direction at an interval in a longer direction of the sheet 1. The slits 2 at each of the end portions of the shorter direction are provided so as to be separated from an end 1a of each of the end portion.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a packaging material that can be suitably used for binding or wrapping various articles.

  Conventionally, a sealed sheet or newspaper is bound with a belt-like sheet, or a product with a lidded tray such as a lunch box sold at a convenience store, etc. Various packaging machines for welding and wrapping and wrapping are known (for example, see Non-Patent Document 1).

  When the belt-like sheet is made of a resin film, it is difficult to cut by hand unless a cutting tool such as scissors is used when binding or cutting the banded sheet.

  For this reason, for example, as shown in Patent Document 1, incisions are made at both ends in the width direction of the long film, that is, many incisions are made along the longitudinal direction of the sheet at both ends in the width direction of the belt-like sheet. It is conceivable to form.

JP 2007-44808 A http://www.strapack.co.jp/productinfo/cat77/cat201/

  However, when a large number of cuts are formed at both ends of the belt-like sheet, when the belt-like sheet is looped around the article to be banded and wrapped around the belt-wrapped packaging machine, The notch is caught by a roller or the like inside the packaging machine, and the notch spreads and becomes easy to be cut, and the sheet may be cut and the operation may be interrupted during the wrapping and wrapping operation.

  The present invention has been made paying attention to such points, and provides a packaging material that can be easily cut by hand after packaging without being caught inside the packaging machine during packaging. Objective.

In order to achieve the above object, the present invention is configured as follows.
(1) In the packaging material according to the present invention, a plurality of slits extending in the short direction are provided at both ends in the short direction of the sheet at intervals in the longitudinal direction of the sheet. The slit at each end is provided apart from the end of each end.

  According to the present invention, since the slits at the respective end portions in the short direction of the sheet are provided apart from the ends of the respective end portions, the packaging machine has a configuration in which cuts are formed at both ends in the short direction of the sheet. It is possible to prevent the cuts at both ends from being caught by a roller or the like inside the packaging machine and being cut at the time of band wrapping or the like.

  On the other hand, since the slits at both ends in the short direction of the sheet extend in the short direction, the banded sheet can be easily cut by hand along the short direction. In addition, since a plurality of slits are provided at intervals in the longitudinal direction of the sheet, the banded sheet can be easily cut by hand from a plurality of locations in the longitudinal direction.

  (2) In a preferred embodiment of the present invention, the spaced distance from the end of each end to the slit at each end is not less than 0.5 mm and not more than 3.0 mm.

  Breaking load when a load that cuts the sheet along the slit acts as will be described later as the distance from the end of each end in the short direction of the sheet to the slit at each end increases. Becomes larger and is not easily broken. Therefore, in order to facilitate the manual cutting of the banded sheet, it is preferable that the distance is small.

  On the other hand, when the distance is small, the breaking load becomes small and the breakage is likely to occur. Therefore, in order to prevent the sheet from being easily broken when performing wrapping packaging using a packaging machine, it is preferable that the separated distance is larger.

  According to this embodiment, since the separated distance is 0.5 mm or more and 3.0 mm or less, which is a required range, the banded sheet can be easily cut by hand, When carrying out wrapping packaging etc., it can control that a sheet is cut inside a packaging machine.

  (3) In another embodiment of the present invention, the separated distance is 1.0 mm or greater and 2.0 mm or less.

  In this embodiment, since the separated distance is set to 1.0 mm or more, it is possible to effectively suppress the cutting of the sheet inside the packaging machine when performing banding and packaging with the packaging machine. On the other hand, since the distance is 2.0 mm or less, the banded sheet can be more easily cut by hand.

  (4) In a preferred embodiment of the present invention, the long sheet is wound into a roll.

  According to this embodiment, the roll-like long sheet can be attached to the packaging machine and subjected to banding and packaging.

  According to the present invention, since the slits at the respective end portions in the short direction of the sheet are provided apart from the ends of the respective end portions, the configuration is such that the slit is formed at the end of each end portion. It is possible to prevent a slit from being caught by a roller or the like inside the packaging machine and being cut during band wrapping.

  On the other hand, since the slits at both ends in the short direction of the sheet extend in the short direction, the banded sheet can be easily cut by hand along the short direction. Moreover, since a plurality of slits are provided at intervals in the longitudinal direction of the sheet, the sheet can be easily cut by hand at a plurality of locations in the longitudinal direction of the sheet.

It is a perspective view of the packaging material of one Embodiment of this invention. It is an enlarged view which shows the sheet | seat of FIG. It is a figure which shows the sheet | seat of a prior art example. It is a figure for demonstrating a test method. It is the schematic of a packaging machine. It is the schematic of a packaging machine.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view of a packaging material according to an embodiment of the present invention. The packaging material of this embodiment is provided to a user in a state of a sheet roll 1R in which a continuous long sheet 1 having a constant width is wound in a roll shape. Used in a packaging machine that performs

  The sheet 1 of this embodiment is a film sheet made of a resin film such as OPP (biaxially stretched polypropylene). The resin film is not limited to OPP but may be LDPE (low density polyethylene), HDPE (high density polyethylene), CPP (unstretched polypropylene), EVA (ethylene vinyl acetate copolymer), or the like.

  FIG. 2 is a partially enlarged view of the sheet 1 of this embodiment.

  In this embodiment, the sheet 1 is prevented from being cut by being caught by a roller or the like inside the packaging machine during banding packaging by a packaging machine such as a banding machine. Is configured as follows so that it can be easily cut by hand without using a blade such as scissors.

  That is, the slits 2, 2 extending in the short direction are spaced from the ends 1 a, 1 a of the respective end portions at both ends in the short direction (left-right direction in FIG. 2) of the sheet 1 of this embodiment. A plurality of slits are formed at substantially equal intervals in the longitudinal direction (vertical direction in FIG. 2) of the sheet 1.

  In this embodiment, the slits 2 and 2 at the end portions extending in the short direction of the sheet 1 are provided separately from the ends 1a and 1a of the end portions, for example, the end portions of the sheet. Like the configuration in which the slit is formed without being separated from the end of the wrapping machine, when the banding wrapping is performed by the packaging machine, the slit formed at the end of each end is caught on the roller or the like inside the packaging machine. It is possible to avoid a situation in which the sheet is cut and the packaging operation is interrupted.

2, slits 2 ₁ and 2 ₁ are formed at both ends 1 ₁ a and 1 ₁ a in the short direction of the sheet 1 ₁ as shown in FIG. 3 with respect to the sheet 1 of the present embodiment shown in FIG. sheet 1 _1, i.e., the slits 2 ₁ at each end of the lateral _direction, 2 _1, and the conventional example to produce a sheet 1 ₁ not spaced from the end 1 _{1 a,} 1 1 _a of each end .

This conventional sheet 1 ₁ and the sheet 1 of the present embodiment was compared such breaking strength as described below.

Here, as shown in FIGS. 2 and 3, the distance from the end 1a, _{1 1} a of each end of the widthwise direction of the seat 1, 1 ₁ to the slit 2, 2 ₁ d1, slit 2 , 2 ₁ , the length in the short direction of d 2, both slits 2, 2 adjacent in the short direction, d 3, the distance between 2 ₁ , 2 ₁ , d 3, the slit 2 adjacent in the longitudinal direction of the sheets 1, ₁ 1 ₁ 2; The distance between 2 ₁ and 2 ₁ was d4, and the width of the sheet 1 and 1 _{1 in} the short direction was d5.

Incidentally, the sheet 1 of the embodiment of FIG 2, of the sheet 1 ₁ of the conventional example 3, except for the difference in size such as the d1, was prepared in the same manner using the same material.

  In the embodiment of FIG. 2, three types of sheets 1 with different d1 dimensions were produced, and examples 1 to 3 were obtained.

Table 1 below shows the dimensions of Examples 1 to 3 and the d1 to d5 in the conventional example. In Table 1, the ratio (d1 / d5) of the separation distance d1 from the end 1a, 1 ₁ a of each end to the slit 2, 2 _{1 with} respect to the width d5 of the sheet 1, ₁₁ is also shown. Show.

表１に示すように、各端部における各スリット２，２_１から各端部の端１ａ，１_１ａまでの離間距離ｄ１（ｍｍ）は、従来例は、「０．０」であり、実施例１〜３では、それぞれ「１．０」、「２．０」、「３．０」とした。スリット２，２_１の短手方向の長さｄ２（ｍｍ）は、従来例は「０．３」とし、各実施例は全て「０．５」とした。短手方向の両スリット２，２；２_１，２_１間の距離ｄ３（ｍｍ）は、上記距離ｄ１，ｄ２に応じて、従来例は「４９．４」となり、実施例１〜３は、「４７．０」、「４５．０」、「４３．０」となる。また、シート１，１_１の長手方向のスリット２，２；２_１，２_１間の距離ｄ４（ｍｍ）は、全て「５．０」であり、シート１，１_１の幅ｄ５（ｍｍ）は、全て「５０．０」である。

As shown in Table 1, the distance d1 (mm) from each slit 2, 2 ₁ to the end 1a, _{1 1} a of each end of each end, prior art is "0.0", In Examples 1 to 3, “1.0”, “2.0”, and “3.0” were set, respectively. Length in the lateral direction of the slit 2,2 ₁ d2 (mm), the conventional example is set to "0.3", and the respective Examples are all "0.5". The distance d3 (mm) between the slits 2, 2; 2 ₁ and 2 _{1 in the} short direction is “49.4” in the conventional example according to the distances d1 and d2, and Examples 1 to 3 are “47.0”, “45.0”, and “43.0”. The sheet 1,1 ₁ in the longitudinal direction of the slit 2, _2; 2 1, ₂ the distance between ₁ d4 (mm) are all "5.0", sheet 1,1 ₁ width d5 (mm) Are all “50.0”.

Incidentally, the width d5 of the seat 1, 1 _1, the ratio of the distance d1 from the end 1a, _{1 1} a of each end to the respective slits 2, 2 ₁ (d1 / d5) are conventional example "0.0 In Examples 1 to 3, "0.02", "0.04", and "0.06" are obtained, respectively.

First, the sheet 1,1 _1, on the assumption that is cut along the slit 2, 2 _1, to measure the breaking strength in the following manner.

Figure 4 is a diagram for explaining a method of measuring the breaking strength, in FIG. 4, will be described as applied to the sheet 1 of the present embodiment, the same applies to the seat 1 ₁ of a conventional example Measure the breaking strength.

  As shown in FIG. 4 (a), one end portion in the short direction of the sheet 1 is placed between two adhesive tapes 3a and 3b, for example, adhesive tapes 3a and 3b made of a commercially available cellophane tape. The position is shifted along the longitudinal direction of the sheet 1 so that there are two slits 2a, and as shown in FIG. 4B, the sheet 1 is folded in half so as to be sandwiched between the adhesive surfaces, and is gripped. 4A of the two adhesive tapes 3a and 3b are respectively held by the chuck of the tensile tester, and one adhesive tape 3a is moved upward, and the other adhesive tape. Pull 3b downward to measure the breaking strength.

  Thus, since one slit 2a of the sheet 1 is pulled up and down so as to tear from both sides thereof, as will be described later, both ends in the longitudinal direction of the sheet 1 are pulled up and down along the longitudinal direction. Thus, the banded sheet 1 is approximated by the manner in which the load acts when it is cut by hand along its short direction. Therefore, the easiness of cutting when the banded sheet 1 is cut by hand can be evaluated by the measured breaking load.

  Hereinafter, in order to distinguish the both ends of the sheet 1 in the longitudinal direction from the tensile test in the longitudinal direction in which the sheet 1 is pulled up and down along the longitudinal direction, as shown in FIG. A tensile test that pulls up and down so as to tear from is referred to as a “slit tensile test”.

  In this slit tensile test, as shown in FIG. 4A, the distance d6 between the adhesive tapes 3a and 3b on both sides sandwiching one slit 2a is 5 mm, and the distance from the slit 2a to each adhesive tape 3a and 3b. Were equally 2.5 mm. The width d7 of the adhesive tapes 3a and 3b is 18 mm, and the length d11 in the longitudinal direction of the folded adhesive tapes 3a and 3b is 75 mm. Among them, the length d8 of the portion in contact with the sheet 1 is 25 mm and pulls upward or downward. The length d10 of the pulling margin was 25 mm, and the length d9 from the end 1a of the end portion of the sheet 1 to the pulling margin was 25 mm.

The sheet 1,1 ₁ of thickness of Examples 1-3 and the conventional example were a 40 to 50 .mu.m.

  For the conventional example and Examples 1 to 3, three sample sheets N1 to N3 were prepared, and the breaking strength of each of the sample sheets N1 to N3 was measured as described above using a Tensilon tensile tester. The average value was calculated.

  The distance between chucks in the Tensilon tensile tester was 50 mm, and the tensile speed was 300 mm / min.

  The results are shown in Table 2 below.

表２に示すように、各スリット２，２_１から各端部の端１ａ，１_１ａまでの離間距離ｄ１が「０．０」、すなわち、各端部の端１_１ａにスリット２_１が形成された従来例は、破断強度の平均値（ｇ／５０ｍｍ）が、２４．７であった。これに対して、前記離間距離ｄ１が「１．０ｍｍ」の実施例１は、破断強度の平均値が２４０．３であり、前記離間距離ｄ１が「２．０ｍｍ」の実施例２は、破断強度の平均値が５３３．７であり、前記離間距離ｄ１が「３．０ｍｍ」の実施例３は、破断強度の平均値が８０５．７であった。

As shown in Table 2, the distance d1 from each slit 2, 2 ₁ to the end 1a, _{1 1} a of each end is "0.0", i.e., the slits _{2 1} to the end _{1 1} a of each end In the conventional example in which was formed, the average value of the breaking strength (g / 50 mm) was 24.7. On the other hand, Example 1 in which the separation distance d1 is “1.0 mm” has an average breaking strength of 240.3, and Example 2 in which the separation distance d1 is “2.0 mm” In Example 3 in which the average value of the strength was 533.7 and the separation distance d1 was “3.0 mm”, the average value of the breaking strength was 805.7.

Thus, the conventional example end 1 ₁ slits 2 _{1 a} is formed at each end is the most breaking strength was small. The separation distance d1 (mm) from the end 1a of each end to each slit 2 increases in the order of Example 1, Example 2, and Example 3, but the average value of the breaking strength is also the same as in Example 1. Example 2 and Example 3 were larger in this order.

Thus, reducing the distance d1 from the end 1a, _{1 1} a of each end portion to respective slits 2,2 _1, breaking strength by the slit tensile test decreases, each from the end 1a, _{1 1} a of each end increasing the distance d1 to the slits 2, 2 _1, breaking strength by the slit tensile test increases.

That is, by adjusting the distance d1 from the end 1a, 1 1 _a of each end portion to respective slits 2,2 _1, it is possible to adjust the breaking strength by the slit tensile test.

The slit tensile test, as described above, the longitudinal ends of the seat 1, 1 _1, as compared with the tensile test pulled up and down along the longitudinal direction thereof is cut by hand sheet 1 which is a strapping It is approximated by how the load acts, and the ease of cutting when the banded sheets 1 and ₁₁ are cut by hand can be evaluated by the breaking strength.

  According to Table 2 above, in the order of Example 3, Example 2, Example 1, and Conventional Example, the breaking strength decreases, it becomes easy to cut the sheet by hand, and the conventional example with the smallest breaking strength is present. The sheet can be cut most easily by hand.

The breaking strength, as described above, can be adjusted by the distance d1 from each slit 2, 2 ₁ at each end to end 1a, 1 1 _a of each end.

  Therefore, when the sheet is easily cut by hand, Example 2 in which the separation distance d1 is “2.0 mm” as compared with Example 3 in which the separation distance d1 shown in Table 1 is “3.0 mm” is shown. Compared to the second embodiment, the first embodiment in which the separation distance d1 is “1.0 mm” is more preferable, and in comparison with the first embodiment, the conventional example in which the separation distance d1 is “0” is most preferable. become. Further, if the separation distance d1 is “0.5 mm”, it is more preferable than the first embodiment in which the separation distance d1 is “1.0 mm”.

  The above is a case considering the ease of cutting the sheet by hand.

Next, it was evaluated as follows whether or not the work is interrupted by cutting the sheets 1 and ₁₁ inside the packaging machine during the packaging with a packaging machine such as a strapping machine.

That is, among the first to third embodiments, respectively using a sheet roll of sheet 1 of the breaking strength is the smallest broken easily Example 1, above conventional sheet 1 ₁ of a sheet roll in the slit tensile test Then, each of the wrapping and wrapping operations by the packaging machine was performed.

Specifically, it was carried out in the sheet 1 sheet roll in the conventional example of the sheet 1 ₁ of the sheet roll by using each 100 times the strapping packaging operations each Example 1. During any of the sheet 1, 1 ₁ is also 100 times a strapping packaging operation of, not that the sheet 1, 1 ₁ is cut, there was no trouble in the strapping packaging operations.

Therefore, when I went and end work and preparation work of the strapping packaging operation, the sheet 1, 1 _1, whether there is such a partial tear and slit 2, 2 ₁ of the spread was assessed by visual inspection.

More specifically, we do continue to packaging finished work and packaging preparatory work, to evaluate each of the sheet 1, 1 ₁ with the naked eye. This is performed 10 times, the sheet 1,1 ₁ was compared the number of occurrences of abnormality such as partial tear or slits 2, 2 ₁ spread.

  The packaging preparation work and the packaging finishing work were performed as follows.

(1) Packing preparation work As shown in the schematic diagrams of FIGS. 5 and 6, the packaging machine 5 that performs wrapping packaging has a window portion 6 penetrating in a rectangular shape at the top of the main body. A sheet guide (not shown) for supporting the sheet in a loop shape is provided in the surrounding gate-shaped frame. In the lower part of the main body, there are provided a shaft 7 on which a sheet roll is mounted, guide rollers 8 and 9 for guiding the sheet, a driving roller 11 and a driven roller 12 for feeding or rewinding the sheet.

  Usually, the packaging machine 5 feeds the sheet to the sheet guide and supports it in a loop so as to go around the banded article, and removes the support and drops the looped sheet onto the banded article. Then, tighten the sheet and wrap it.

  The packaging preparation work is an operation for changing the state of FIG. 5 to the state of FIG. 6 and is performed according to the following procedure.

(A) Mount the sheet rolls 1R, 1 ₁ R of Example 1 or the conventional example on the shaft 7 at the bottom of the main body of the packaging machine 5.

(B) Along the sheet feeding path of the packaging machine 5, the sheets 1, 11 of the _first embodiment or the conventional example are manually wound around the guide rollers 8, 9, and to the vicinity immediately below the rectangular window portion 6. through the sheet 1, 1 _1, and press the set button 10.

(C) As a result, the leading ends of the sheet sheets 1, ₁₁ of Example 1 or the conventional example are set between the driving roller 11 and the driven roller 12 at the lower part of the main body of the packaging machine 5.

(D) When the preparation button 13 on the main panel is pressed, the set sheets 1 and ₁₁ are sent out along a sheet guide (not shown) that supports the sheets 1 and ₁₁ as shown in FIG. A loop is formed so as to go around the rectangular window.

(2) Packaging end operation This is an operation for changing the state shown in FIG. 6 to the state shown in FIG.

(A) When the end button 14 on the main panel is pressed, the sheet guide (not shown) supporting the sheets 1 and ₁₁ moves in the upper part of the main body of the packaging machine 5 and the removed sheets 1 and ₁₁ are dropped. To do.

(B) Grasp the dropped sheets 1 and ₁₁ by hand and cut the sheets 1 and ₁₁ by pressing the button on the main panel.

(C) remaining in the conveyance path of the lower body of the packaging machine 5 Remove the sheet 1,1 _1, further removing the sheet roll 1R, _{1 1} R from the axis 7.

Performed continuously and packaging finished working with the above packaging preparation, the recovered sheet 1,1 ₁ was visually observed and evaluated whether such partial tear or slits 2, 2 ₁ spread. This was performed 10 times (N1 to N10).

  Table 3 shows the 10 evaluation results.

この表３において、丸印は、シートに部分的なちぎれやスリット２，２_１の広がりなどがない状態、すなわち、破れ無しを示し、三角印は、シートに部分的なちぎれやスリット２，２_１の広がりなどがある状態、すなわち、破れ有りを示している。

In Table 3, circles, state without such partial tear or slits 2, 2 ₁ of spread sheets, i.e., indicates the absence of tear, triangles, partial tear or slit 2, 2 on the sheet _It shows a state where there is a spread of _{1 or} the like, that is, the presence of tearing.

In Example 1, in any of 10 times (N1 to n10), no partial tearing or spread of the slit 2 was observed, but in the conventional example, 3 times out of 10 times (N6, N8, N10), such as a partial tear and slit 2 ₁ of spread on the sheet was observed.

Thus, in the conventional example slits 2 ₁ is formed on the end 1 _{1 a} of each end of the sheet 1 _1, three times in 10 times, such as partial tear or slits 2 ₁ of spread sheets 1 ₁ In contrast to this, in Example 1 in which the slits 2 were formed apart from the ends 1a of the respective ends of the sheet 1, no partial tearing or spreading of the slits 2 was observed in the sheet 1. .

Therefore, when the strapping packing due packaging machine belt hanging machine or the like, in order to prevent the sheet is cut caught inside the packaging machine, as in the conventional example, the slits 2 _1, sheet 1 rather than forming the end 1 _{1 a} of each end of _1, as in the present embodiment, it is necessary to form a slit 2 is separated from the end 1a of each end.

Distance d1 of the first embodiment including partial tear or slits 2 ₁ spread on the sheet 1 is not observed, the so on, is "1.0mm".

  As described above, when the separation distance d1 is increased, the breaking strength by the slit tensile test is increased and is not easily broken. Therefore, in order to prevent the sheet from being cut by the packaging machine, the breaking strength of the conventional example is used. Is more preferable, and it is more preferable that the breaking strength of Example 1 or higher be exceeded.

  If the separation distance d1 is “0.5 mm”, the separation distance d1 exceeds the breaking strength of the conventional example of “0.0”, so the separation distance d1 is preferably “0.5 mm” or more. The separation distance d1 is more preferably “1.0 mm” or more, which is the separation distance of the first embodiment.

  On the other hand, in order to facilitate the cutting of the sheet by hand, it is preferable that the breaking strength by the slit tensile test is small as described above, preferably the breaking strength of Example 3 or less, and the breaking strength of Example 2 or less. It is more preferable that

  In Example 3, since the separation distance d1 is “3.0 mm”, the separation distance d1 is preferably set to “3.0 mm” or less.

  In Example 2, since the separation distance d1 is “2.0 mm”, it is more preferable that the separation distance d1 is “2.0 mm” or less.

  As described above, the separation distance d1 is “0.5 mm” in order to prevent the sheet from being cut inside the packaging machine at the time of wrapping packaging by a packaging machine such as a strapping machine. It is preferable that it is above, and it is more preferable that it is “1.0 mm” or more. In addition, in order to easily cut the banded sheet by hand, the separation distance d1 is preferably “3.0 mm” or less, and more preferably “2.0 mm” or less. preferable.

  That is, in order to prevent the sheet from being cut inside the packaging machine during banding packaging by a packaging machine such as a banding machine, and to easily cut the banded sheet by hand. The distance d1 is preferably “0.5 mm” or more and “3.0 mm” or less, and more preferably “1.0 mm” or more and “2.0 mm” or less.

  In wrapping wrapping with a wrapping machine such as a wrapping machine, the sheet is fed out and looped around the article to be wrapped, and the looped sheet is drawn and tightened to wind the sheet around the article to be wrapped. Therefore, the tensile strength in the longitudinal direction of the sheet is also important.

Therefore, for the conventional example and Examples 1 to 3, the tensile strength in the longitudinal direction of the sheets 1 and ₁₁ was also measured.

  Three sample sheets N1 to N3 are prepared, and for each sample sheet N1 to N3, using Tensilon tensile tester, both ends in the longitudinal direction are pulled up and down to measure the tensile breaking strength in the longitudinal direction, The average value was calculated.

  The results are shown in Table 4 below.

表４に示すように、短手方向の各端部における各スリット２，２_１から各端部の端１ａ，１_１ａまでの離間距離ｄ１が「０．０」、すなわち、各端部の端１_１ａにスリット２_１が形成された従来例は、引張破断強度の平均値が、９８０９．３（ｇ／５０ｍｍ）であり、前記離間距離ｄ１が「１．０」の実施例１は、引張破断強度の平均値が８９０４．０であり、前記離間距離ｄ１が「２．０」の実施例２は、引張破断強度の平均値が９２７６．７（ｇ／５０ｍｍ）であり、前記離間距離ｄ１が「３．０」の実施例３は、引張り破断強度の平均値が９２７１．０であった。

As shown in Table 4, the distance d1 from each slit 2, 2 ₁ at each end of the lateral direction to the edge 1a, 1 1 _a of each end is "0.0", i.e., at each end In the conventional example in which the slit 2 ₁ is formed at the end 1 ₁ a, the average value of the tensile breaking strength is 9809.3 (g / 50 mm), and Example 1 in which the separation distance d1 is “1.0” In Example 2, the average value of the tensile breaking strength was 8904.0, and the separation distance d1 was “2.0”, the average value of the tensile breaking strength was 9276.7 (g / 50 mm), and the separation In Example 3 in which the distance d1 was “3.0”, the average value of the tensile strength at break was 9271.0.

In the tensile strength at break along the longitudinal direction of the sheets 1, _11, no tendency change due to the separation distance d 1 was observed as in the slit tensile test.

In the present embodiment as described above, the slits 2 at each end of the sheet 1, since the provided apart from the end 1a of each end, the end 1 _{1 a} of each end slits 2 ₁ formation as in the conventional example are slits 2 _first end 1 _{1 a} of each end, caught on the inside of the packaging machine, the situation hardly occurs such is disconnected.

  In addition, since a plurality of slits 2 are provided in the longitudinal direction, the sheet 1 can be easily cut by hand in the short direction from any of the plurality of locations in the longitudinal direction.

  Further, by setting the distance d1 from the end 1a of each end to the slit 2 with respect to the width d5 of the sheet 1 to be “0.5 mm” or more and “3.0 mm” or less, a packaging machine such as a banding machine or the like. In the case of wrapping and wrapping according to the above, it is possible to prevent the sheet from being cut inside the packaging machine and to easily cut the banded sheet by hand.

  Further, by setting the separation distance d1 to “1.0 mm” or more and “2.0 mm” or less, it is possible to effectively suppress the sheet from being cut inside the packaging machine, while the banded sheet Can be more easily cut by hand.

  As another embodiment of the present invention, the sheet 1 may be laminated with other layers, for example, a heat-sensitive layer containing a coloring material that develops color when heated.

1, 1 ₁ sheet material 1R, 1 ₁ R sheet roll 1a, 1 ₁ a end of edge 2, 2 ₁ slit 3a, 3b adhesive tape 5 packaging machine

Claims (4)

A plurality of slits extending in the short direction are provided at both ends in the short direction of the sheet at intervals in the longitudinal direction of the sheet, and the slit at each end in the short direction is provided at each end. Provided apart from the end of the
A packaging material characterized by that. The spaced distance from the end of each end to the slit at each end is not less than 0.5 mm and not more than 3.0 mm.
The packaging material according to claim 1.   The packaging material according to claim 2, wherein the separated distance is 1.0 mm or more and 2.0 mm or less. The long sheet is wound into a roll,
The packaging material according to any one of claims 1 to 3.

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