JP2023150779A - Packaging material, packaging material and original fabric roll, and packaging bag - Google Patents

Abstract

To provide a packaging material capable of increasing a width of an opening formed by tearing, while suppressing reduction in strength.SOLUTION: A packaging material comprises: a sheet body 10; a notch group 20 including a plurality of notches 21 arranged in an opening start area 11 of the sheet body 10; a protective sheet 30 arranged by covering the notch group 20; and first and second cut tapes 41, 42 extending in an opening direction. The cut tapes 41, 42 are at least partially separated from each other in an opening intersection direction. The notch group 20 includes the plurality of notches 21 arranged in the opening intersection direction, and further includes at least a first end side notch 21A1 crossing the first cut tape 41, and a second end side notch 21A2 crossing the second cut tape 42. A pair of notches 21 adjacent to each other in the opening intersection direction among the plurality of notches 21 are separated in the opening direction, and each have overlapping parts 23 overlapped with each other as viewed in the opening direction.SELECTED DRAWING: Figure 1

Description

The present invention relates to a packaging material, a packaging material roll, and a packaging bag.

BACKGROUND ART Conventionally, film-like packaging materials have been known that allow bulk foods such as rice balls, sandwiches, and cooked bread to be eaten hygienically by holding them in the hand. For example, Patent Document 1 discloses a packaging material that is opened by pinching and tearing an opening piece provided on the packaging material to form a band-shaped opening.

Japanese Patent Application Publication No. 2003-341715

In the packaging material described in Patent Document 1, a band-shaped cut tape attached to the packaging material so as to be continuous with the opening piece is torn together with the packaging material, and an opening corresponding to the width of the cut tape is formed. be done. Usually, the width of the opening is small compared to the size of the food, so it may be difficult to expose the food to eat or take out the food through the opening. Therefore, by increasing the width of the opening piece, it is possible to widen the opening. However, in that case, the notch around the opening piece becomes longer, reducing the strength of the packaging material. The decrease in strength of the packaging material causes problems such as, for example, when tension is applied to the original fabric during manufacturing of the packaging material, stress concentrates around the notch and the packaging material breaks. There is also the problem that the unsealing piece tends to roll over, making the packaging material more likely to be torn inadvertently.

Therefore, the main object of the present invention is to provide a packaging material that can increase the width of the opening formed by tearing while suppressing a decrease in strength.

(1) The packaging material of the present invention includes a sheet main body that can surround an object to be packaged and has an inner surface facing the object and an outer surface opposite to the inner surface, and an opening start area set in the sheet main body. a notch group including a plurality of notches that are arranged and do not open on the edge of the sheet body; a protective sheet that is arranged on the sheet body so as to cover the notch group; and a protective sheet that extends in the opening direction from at least the opening start area. A packaging material comprising a first cut tape and a second cut tape, wherein at least a portion of the first cut tape and the second cut tape extend in an opening cross direction perpendicular to the opening direction. They are spaced apart from each other, and the notch group includes a plurality of notches arranged in the unsealing cross direction, and includes at least a first end-side notch that intersects the first cut tape, and a second notch that intersects the first cut tape. a second end-side notch that intersects the cut tape, and further, among the plurality of notches, a pair of notches adjacent to each other in the unsealing cross direction are arranged apart in the unsealing direction, and , each have an overlapping portion that overlaps with each other when viewed in the unsealing direction.

(2) In (1), the notch group has three or more notches including the first end side notch and the second end side notch, and the notch group has three or more notches including the first end side notch and the second end side notch, and It is preferable that the part-side notch and the second end-side notch are at the same position in the opening direction.

(3) In (1) or (2), the notch group includes an upstream notch group including at least one notch, and at least one upstream notch group disposed downstream of the upstream notch group in the opening direction. a downstream notch group including the notch, and at least one of the upstream notch group and the downstream notch group includes a plurality of notches arranged in parallel along the opening cross direction. A group of notches is preferred.

(4) In (3), the number of notches in the upstream notch group and the number of notches in the downstream notch group may be different.

(5) In (3), the number of notches in the upstream notch group and the number of notches in the downstream notch group may be the same.

(6) In (4), the upstream notch group includes three notches, and the downstream notch group includes two notches.

(7) In any one of (1) to (6), the notch has a length direction extending in the unsealing cross direction, and both ends in the length direction are at the center of the length direction. It is preferable to have a shape located on the downstream side in the opening direction.

(8) In (7), it is preferable that the notch has a shape that is convex toward the upstream side in the opening direction, and has the shape of an arc, an inverted V shape, or a trapezoid shape.

(9) In any one of (1) to (8), the first cut tape and the second cut tape may have portions that intersect with each other.

(10) In any one of (1) to (9), the protective sheet is preferably disposed on the outer surface of the sheet body.

(11) In any one of (1) to (10), a pair of band-shaped sheet portions extending in the opening direction are attached to each of the first cut tape and the second cut tape of the sheet main body. Preferably, it is disposed on at least one of the inner and outer surfaces of the outside.

(12) The packaging bag of the present invention includes a bag body in which the sheet main body of the packaging material according to any one of (1) to (11) is formed into a bag shape, and an object to be packaged is housed inside the bag body. It is something that will be done.

(13) In (12), the sheet body may be folded to form the bag into a cubic shape.

(14) The packaging material roll of the present invention is such that the packaging material roll of the present invention is wound into a roll, in which the packaging material of (11) is integrated so as to be continuous in the direction in which the band-shaped sheet portion extends. It is something that

According to the present invention, it is possible to provide a packaging material that can increase the width of an opening formed by tearing while suppressing a decrease in strength.

It is a top view showing a packaging material concerning an embodiment. FIG. 2 is a perspective view of a packaging material according to an embodiment. FIG. 2 is an exploded perspective view of a packaging material according to an embodiment. FIG. 2 is an enlarged plan view showing an opening start area set in the packaging material according to the embodiment and its surroundings. FIG. 3 is an enlarged plan view showing a notch group according to the embodiment. FIG. 7 is an enlarged plan view showing another example of the notch group according to the embodiment. FIG. 2 is a perspective view showing a state in which food is packaged with the packaging material of the embodiment. It is a perspective view showing the state where the packaging material of an embodiment is opened. FIG. 3 is a diagram for explaining details of a notch group according to the embodiment, and is a partially enlarged plan view of the seat body. FIG. 7 is a plan view showing a state in which the sheet main body is opened starting from the notch group in the embodiment. It is a perspective view showing an example of the packaging bag obtained by processing the packaging material concerning an embodiment. It is a perspective view showing a packaging material original fabric roll concerning an embodiment. FIG. 1 is a side view schematically showing an example of a manufacturing line that implements a method for manufacturing a packaging material according to an embodiment. It is a figure which shows the notch group based on the 1st modification of embodiment, Comprising: It is a partially enlarged plan view of a seat main body. FIG. 7 is a plan view showing a state in which the sheet main body is opened starting from the notch group in the first modification. It is a figure which shows the notch group based on the 2nd modification of embodiment, Comprising: It is a partially enlarged plan view of a seat main body. FIG. 7 is a plan view showing a state in which the sheet main body is opened starting from the notch group in the second modification. It is a figure which shows the notch group based on the 3rd modification of embodiment, Comprising: It is a partially enlarged plan view of a seat main body. FIG. 7 is a plan view showing a state in which the sheet body is opened starting from the notch group in the third modification. It is a figure which shows the notch group based on the 4th modification of embodiment, Comprising: It is a partially enlarged plan view of a seat main body. FIG. 7 is a plan view showing a state in which the sheet body is opened starting from the notch group in the fourth modification. It is a figure which shows the notch group based on the 5th modification of embodiment, Comprising: It is a partially enlarged plan view of a seat main body. FIG. 9 is a plan view showing a state in which the sheet body is opened starting from the notch group in the fifth modification. In the packaging material concerning an embodiment, it is a top view of a packaging material to which a modified example in which the shape of the cut tape is different is applied.

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

(packaging material)
FIG. 1 is a plan view of the packaging material 1 according to the embodiment viewed from the outer surface 10b side of the sheet body 10, FIG. 2 is a perspective view of the packaging material 1, and FIG. 3 is an exploded perspective view of the packaging material 1. FIG. 4A is an enlarged view showing the opening start area 11 set on the packaging material 1 and its surroundings. FIG. 4B is an enlarged view showing a group of notches provided in the packaging material 1. FIG. 5 is a perspective view showing the food 5 packaged with the packaging material 1, and FIG. 6 is a perspective view showing the packaging material 1 being unsealed.

For example, as shown in FIG. 5, the packaging material 1 wraps a rectangular parallelepiped-shaped food 5 as a packaged object by push-up packaging, which will be described later.

As shown in FIGS. 1 to 3, the packaging material 1 according to the embodiment includes a sheet body 10, which is the main body of the packaging material 1, a protective sheet 30, a first cut tape 41, and a second cut tape 42. , and a band-shaped sheet portion 50. In FIGS. 1 to 3, the length direction of the packaging material 1 and the sheet body 10 is indicated by L, and the width direction thereof is indicated by W. In the following, the length direction and width direction of the sheet body 10 refer to the directions indicated by L and W in FIGS. 1 to 3, respectively. Note that the width direction W may be referred to as the left-right direction. The left-right direction in that case is the left-right direction in FIG.

As shown in FIGS. 1 to 3, the sheet body 10 is a resin film formed into a rectangular shape having a length direction and a width direction. The sheet body 10 has an inner surface 10a facing the packaged object, and an outer surface 10b opposite to the inner surface 10a. The sheet main body 10 has a shape and size that allows it to surround the entire surface of the object to be packaged.

An unsealing start area 11 is set at a predetermined location in the center of the sheet body 10 in the width direction and on one end side in the length direction (upper end side in FIG. 1). In the opening start area 11 of the sheet body 10, a notch group 20 including a plurality of notches 21 is arranged. Each of the plurality of notches 21 is a cut formed by penetrating the sheet body 10 with a thin blade. None of the plurality of notches 21 is open to the four side edges 10e of the seat body 10.

The first cut tape 41 passes through one end of the opening start area 11 in the width direction (the left end in FIG. 1), and the other end of the opening start area 11 in the width direction (the right end in FIG. 1). The second cut tape 42 passes through the section). The first cut tape 41 and the second cut tape 42 are parallel to the length direction of the sheet body 10 and extend over the entire length thereof. The first cut tape 41 and the second cut tape 42 are arranged on the inner surface 10a of the sheet body 10. The first cut tape 41 and the second cut tape 42 are attached to the inner surface 10a of the sheet body 10 by ultrasonic sealing, heat sealing, adhesive coating, or the like.

Note that each of the first cut tape 41 and the second cut tape 42 may be arranged on the outer surface 10b of the sheet main body 10, or may be arranged on both the inner surface 10a and the outer surface 10b with the sheet main body 10 interposed therebetween. Good too.

The sheet body 10 extends from the unsealing start area 11 along the length direction, which is the extending direction of the first cut tape 41 and the second cut tape 42, on the side opposite to the unseal start area 11 in the length direction. The package is opened by tearing toward the other end (lower side in FIG. 1). Arrow M in FIG. 1 indicates the tearing direction of the sheet body 10, that is, the opening direction. Furthermore, arrow M1 indicates the upstream side in the unsealing direction, and arrow M2 indicates the downstream side in the unsealing direction.

The first cut tape 41 and the second cut tape 42 extend in the unsealing direction and are spaced apart from each other in parallel to each other in the width direction of the sheet body 10, which is the unsealing cross direction orthogonal to the unsealing direction.

The plurality of notches 21 constituting the notch group 20 have the same shape and size. As shown in FIG. 4A, the notch 21 of the embodiment has a symmetrical arc shape that is gently convex toward the upstream side in the opening direction. One notch 21 extends generally in the width direction of the seat body 10. Therefore, the notch 21 has a length direction extending in the width direction of the seat body 10. It can be said that the arc-shaped notch 21 has a shape in which both end portions in the length direction are located downstream in the opening direction from the center portion in the length direction.

The notch group 20 having a plurality of such notches 21 includes an upstream notch group 20A and a downstream notch group 20B. The upstream notch group 20A includes a plurality of first notches 21A arranged in parallel in the width direction of the seat body 10. The downstream notch group 20B includes a plurality of second notches 21B arranged in parallel in the width direction of the seat body 10. The downstream notch group 20B is arranged further downstream in the opening direction than the upstream notch group 20A. Below, if there is no need to specifically explain the first notch 21A and the second notch 21B separately, these notches 21A and 21B may be collectively referred to as the notch 21.

The upstream notch group 20A of the embodiment is a parallel notch group having three first notches 21A arranged at equal intervals in the width direction of the seat body 10. Although the interval between the first notches 21A adjacent to each other in the width direction of the sheet body 10 is arbitrary, the interval is, for example, about 1/10 to 9/10 of the length direction of the first notches 21A. Ru.

The downstream notch group 20B of the embodiment is a parallel notch group having two second notches 21B spaced apart from each other in the width direction of the seat body 10. That is, in this embodiment, the total number of notches 21 is three or more, and the number of notches 21 in the upstream notch group 20A is different from the number of notches 21 in the downstream notch group 20B. The widthwise interval between the two second notches 21B is the same as the interval between the first notches 21A of the upstream notch group 20A. Each of the two second notches 21B of the downstream notch group 20B is arranged between each of the first notches 21A of the upstream notch group 20A when viewed in the unsealing direction, which is the length direction of the sheet body 10. has been done. The longitudinal center position of each second notch 21B of the downstream notch group 20B and the intermediate position between adjacent first notches 21A of the upstream notch group 20A are aligned in the width direction.

The downstream notch group 20B is disposed downstream of the upstream notch group 20A at a distance of, for example, about 1 mm to 20 mm in the opening direction.

As shown in FIG. 4B, when a total of five notches 21, including three first notches 21A of the upstream notch group 20A and two second notches 21B of the downstream notch group 20B, are viewed in plan, these five The two notches 21 are arranged in a staggered manner from one end to the other end in the width direction of the seat body 10 while being alternately shifted from one end to the other end in the length direction of the seat body 10. Therefore, the three first notches 21A of the upstream notch group 20A and the two second notches 21B of the downstream notch group 20B are adjacent to each other in the width direction of the seat body 10. That is, the first notch 21A, the second notch 21B, the first notch 21A, the second notch 21B, and the first notch 21A are arranged in this order from the left side to the right side. A pair of first notches 21A and second notches 21B that are adjacent to each other in the width direction each have an overlap portion 23 that overlaps with each other when viewed in the length direction.

As shown in FIG. 4A, among the three first notches 21A of the upstream notch group 20A, the left first notch 21A intersects with the first cut tape 41, and the right first notch 21A intersects with the first cut tape 41. 21A crosses the second cut tape 42. In the following, the first notch 21A that intersects the first cut tape 41 is referred to as a first end side notch 21A1, and the first notch 21A that intersects the second cut tape 42 is referred to as a second end side notch 21A1. It may be called a side notch 21A2. In the longitudinal direction of the seat body 10, the first end notch 21A1 and the second end notch 21A2 are arranged at the same position. That is, the positions of the first end notch 21A1 and the second end notch 21A2 are aligned in the longitudinal direction of the seat body 10.

The first end-side notch 21A1 intersects the first cut tape 41 at a portion to the left of the center in its length direction. The second end-side notch 21A2 intersects the second cut tape 42 at a portion on the right side of the center in its length direction. The first cut tape 41 is arranged inside (on the second cut tape 42 side) the left end 24a of the first end side notch 21A1. The second cut tape 42 is arranged inside (on the first cut tape 41 side) the right end 24f of the second end side notch 21A2.

As shown in FIG. 4B, by forming each of the first notches 21A of the upstream notch group 20A, each of the mountain-shaped portions of the first notches 21A on the downstream side in the unsealing direction becomes the first notch. 1 opening piece 25A. By forming each of the second notches 21B of the downstream notch group 20B, each of the mountain-shaped portions of the second notches 21B on the downstream side in the unsealing direction becomes a second opening piece 25B. ing.

As described above, each notch 21 of the notch group 20 of this embodiment has the same shape and size, and the intervals between the notches 21 arranged in the width direction are also the same, but the shape and size of each notch 21 are different. Moreover, the intervals in the width direction may also be different. For example, FIG. 4C shows an example in which the two second notches 21B of the downstream notch group 20B are shorter than the three first notches 21A of the upstream notch group 20A. In this case, the distance between the two second notches 21B is larger than the distance between the first notches 21A. A pair of first notches 21A and second notches 21B that are adjacent to each other in the width direction each have an overlap portion 23 that overlaps with each other when viewed in the length direction.

The protective sheet 30 is a rectangular film that is long in the width direction of the sheet body 10. A portion of the protective sheet 30 is adhered to the outer surface 10b of the sheet body 10. Each of the above-mentioned opening pieces 25A and 25B is turned over to the outer surface 10b side through the protective sheet 30.

As shown in FIG. 4A, the protective sheet 30 includes a protective section 31 and a knob section 32. As shown in FIG. The protective portion 31 covers the notch group 20 and is bonded to the outer surface 10b. The protective portion 31 is bonded with an adhesive to a rectangular region including the region where the notch group 20 is formed and a portion around the region where the notch group 20 is formed. The adhesive area of the protection part 31 is approximately equal to the opening start area 11. The entire area of the protection part 31 is bonded to the outer surface 10b, and all the notches 21 of the notch group 20 are closed by this protection part 31. Therefore, all the notches 21 are separated from the outside by the protection part 31. The knob portion 32 is a portion continuous from the protection portion 31 to the upstream side in the opening direction. The knob portion 32 is not bonded to the outer surface 10b, and can be pinched with fingers and turned toward the outer surface 10b.

As shown in FIGS. 1 to 3, a pair of belt-shaped sheet portions 50 extending in the length direction of the seat body 10 are arranged on the inner surface 10a of the seat body 10. As shown in FIGS. The pair of belt-shaped sheet parts 50 includes a first belt-shaped sheet part 51 disposed at a predetermined distance from the first cut tape 41 to the outside in the width direction of the sheet main body 10, and a second belt-shaped sheet part 50 arranged to the outside in the width direction from the second cut tape 42. and a second belt-shaped sheet portion 52 disposed at a predetermined distance from each other. These belt-shaped sheet portions 51 and 52 are approximately parallel to each cut tape 41 and 42. Each band-shaped sheet portion 51, 52 is adhered to the inner surface 10a of the sheet body 10 by ultrasonic sealing, heat sealing, adhesive coating, or the like.

Note that each of the first belt-shaped sheet part 51 and the second belt-shaped sheet part 52 may be arranged on the outer surface 10b of the sheet main body 10, or arranged on both the inner surface 10a and the outer surface 10b with the sheet main body 10 sandwiched therebetween. may be done.

The sheet body 10, the protective sheet 30, each cut tape 41, 42, and each belt-shaped sheet portion 51, 52 are made of a flexible transparent or translucent synthetic resin film. It is preferable that the resin film has thermal weldability in order to facilitate heat sealing. As the resin film, a single layer or multilayer synthetic resin film is used. In the case of a single layer, it is, for example, a synthetic resin film such as (PE), polypropylene (PP), or polyethylene terephthalate (PET). In the case of multiple layers, for example, a synthetic resin film such as polypropylene containing a PVDC (polyvinylidene chloride) coating that acts as a barrier layer to block moisture can be used. Specifically, OPP (biaxially oriented polypropylene), CPP ( Non-stretched polypropylene) and the like are preferably used. Note that at least one of the sheet body 10, the protective sheet 30, each of the cut tapes 41 and 42, and each of the belt-like sheet parts 51 and 52 may be made of a material other than the resin film described above, such as paper or nonwoven fabric. .

The resin films forming the sheet main body 10, the protective sheet 30, each cut tape 41, 42, and each belt-shaped sheet portion 51, 52 may have the same thickness. However, it is desirable that the protective sheet 30 be relatively thick and stiff in order to prevent the grip portion 32, which is to be pinched with fingers, from tearing when opening the package. Further, it is desirable that the sheet main body 10 has a thickness that allows the packaged state to be maintained, and a thickness that allows it to be easily torn when opened.

For example, as shown in FIG. 5, the packaging material 1 presses a rectangular parallelepiped food 5 as an object to be packaged approximately at the center of the inner surface 10a, deforms the packaging material 1 along the external shape of the food 5, and wraps it. The food 5 is packaged by so-called push-up packaging. The packaging material 1 that has wrapped the food 5 is folded in on the back side of the food 5, which is not visible in FIG. 5, to seal the food 5 from the outside, and the packaged state is maintained by pasting tape or the like. Alternatively, the folded portion on the back side of the packaging material 1 may be adhered by heat sealing to maintain the sealed state. The packaging material 1 in which the food 5 is packaged is such that the length direction of the sheet body 10 is approximately parallel to the length direction of the food 5, and a protective sheet 30 is attached to the outer surface 10b slightly toward the center of the front surface side. is placed.

The packaging material 1 can be opened as shown in FIG. 6 by turning over the tab 32 of the protective sheet 30 and pulling the tab 32 in the unsealing direction toward the protective section 31 as indicated by the arrow M in FIGS. 5 and 6. The central portion of the sheet body 10 in the width direction is torn to form an opening 13, and the sheet body 10 is opened.

When the protective sheet 30 is pinched by the knob portion 32 and pulled in the opening direction, the protective portion 31 is peeled off from the outer surface 10b. When the protective sheet is subsequently pulled in the unsealing direction, the plurality of opening pieces 25A and 25B adhered to the protective part 31, which is peeled off from the outer surface 10b, follow the protective part 31 and are turned over. When the plurality of opening pieces 25A and 25B are turned over by the protective sheet 30 in this way, as shown in FIG. 7A, the left end 24a of the first end notch 21A1 and the second end notch 21A2 are opened. Cuts 12a and 12f extending in the opening direction are formed from the right end 24f, respectively. The left and right cuts 12a and 12f are formed on the outside in the width direction of the sheet body 10 of each cut tape 41 and 42.

In the case of the embodiment, there are a total of five notches 21, but when the protective sheet 30 is pulled in the unsealing direction by pinching the knob 32 as described above, each of the first notches 21A of the upstream notch group 20A first opens. Each first opening piece 25A located on the downstream side and adhered to the protection part 31 is turned over toward the outer surface 10b. Then, as shown in FIG. 7A, the sheet body 10 is torn from the outer end 24a of the first notch 21A (first end notch 21A1) on the left side, forming a cut 12a, and The sheet body 10 is torn from the outer end 24f of the first notch 21A (second end notch 21A2) to form a cut 12f. Furthermore, at the same time, the right end 24b of the first notch 21A on the left, the ends 24c and 24d on both sides of the first notch 21A in the middle, the left end 24e of the first notch 21A on the right, Cuts 12b, 12c, 12d, and 12e are formed from each of these in the opening direction. The cuts 12b and 12c reach the second notch 21B on the left side of the downstream notch group 20B, and the cuts 12d and 12e reach the second notch 21B on the right side of the downstream notch group 20B. Thereby, the three first notches 21A and the two second notches 21B are continuous via the cuts 12b, 12c, 12d, and 12e. When the protective sheet 30 is further pulled in the unsealing direction from this state, the three first opening pieces 25A formed by the three first notches 21A on the downstream side of the upstream notch group 20A, and the two The two second opening pieces 25B formed by the second notches 21B are turned over as one unified opening piece.

When the knob 32 is further pulled, the sheet body 10 between the left and right cuts 12a and 12f is torn in the unsealing direction starting from the above-mentioned group of unsealing pieces. Thereby, as shown in FIGS. 6 and 7B, a strip-shaped opening is formed between the left and right cuts 12a and 12f. That is, a strip-shaped opening 13 is formed. Two short strip-shaped remaining pieces 15a and 15b extending in the unsealing direction remain at the unsealing start end that is the upstream end of the opening 13 in the unsealing direction. The pair of left and right remaining pieces 15a and 15b are part of the sheet body 10 that was adhered to the protection part 31. The remaining piece 15a on the left side is formed between the pair of left and right cuts 12b and 12c that reach the second notch 21B on the left side. The remaining piece 15b on the right side is formed between the pair of left and right cuts 12d and 12e that reach the second notch 21B on the right side.

The packaging material 1 is opened by the opening 13 extending in the unsealing direction. When the packaging material 1 is opened in this manner, the food 5 can be eaten through the opening 13 while the food 5 is being held in the hand, or the food 5 can be taken out from the opening 13, for example.

As described above, when the sheet body 10 is torn to form the left and right cuts 12a and 12f to form the opening 13, the first cut tape 41 is placed near the inside of the left cut 12a, and the right cut 12f is The second cut tape 42 is placed near the inner side of the cut tape 42. Here, even if the cut 12a on the left side extends inward, the cut 12a hits the first cut tape 41 and does not cut inward any more, but continues along the outer edge 41a of the first cut tape 41. progress. Even if the cut 12f on the right side advances inwardly, the cut 12f hits the second cut tape 42 and develops along the outer edge 42a of the second cut tape 42 without cutting inward any further. As a result, the pair of left and right cuts 12a and 12f formed on both sides of the first cut tape 41 and the second cut tape 42 do not disappear, and opening can be completed.

(packaging bag)
The packaging form of the packaging material 1 according to the embodiment is not limited to the push-up packaging shown in FIG. 5. For example, as shown in FIG. 8, both ends of the sheet main body 10 in the width direction are pasted together to form the back pasted part 14a, and ends opposite each other on the other end side in the length direction (lower end side in FIG. 8) By pasting them together to form the bottom seal portion 14b, it is possible to obtain a packaging bag 14 that is folded into a so-called clasped-in packaging form, leaving an opening 14c. This packaging bag 14 includes a rectangular bag body 14d. The packaging bag 14 can contain and package bulk foods such as rice balls, sandwiches, cooked bread, and hamburgers, as well as liquid, powder, and granular objects. After accommodating the packaged items, the opening 14c is hermetically sealed. Note that the packaging bag 14 may be one in which the sheet body 10 is further folded in as appropriate to form a bag body 14d into a three-dimensional shape. In this case, the three-dimensional shape includes not only a cubic shape and a rectangular parallelepiped shape but also a three-dimensional shape having a triangular prism shape, a cylindrical shape, or the like.

In this way, when the packaging bag 14 is formed from the packaging material 1, a large number of the packaging bags 14 can be manufactured, and an arbitrary item to be packaged can be stored in the packaging bag 14 and sealed at the supply destination.

(Raw roll of packaging material)
A large number of packaging materials 1 according to the embodiment can be continuously obtained from the packaging material raw roll 1R according to the embodiment shown in FIG.

The packaging material roll 1R according to the embodiment is a long packaging material material roll 1G in which a large number of packaging materials 1 are integrated so as to be continuous along the length direction, and is wound into a roll shape. be. By cutting the cutting boundary 1c provided on the packaging material raw roll 1R, a large number of packaging materials 1 can be sequentially obtained.

The packaging material raw material 1G is mainly composed of a long belt-shaped sheet body raw material 10G made of a resin film. The sheet body original fabric 10G is provided with cutting boundaries 1c that partition a large number of sheet body parts 10A, each of which forms the sheet body 10 one by one. Each of the sheet main body parts 10A is provided with the above-mentioned notch group 20, and a protective sheet 30 for closing the notch group 20 is adhered to the surface of the outer surface 10b. In the protective sheet 30, the protective portion 31 is releasably adhered to the sheet main body original fabric 10G with an adhesive.

In the packaging material raw roll 1R, the protective sheet 30 has a knob portion 32 that is not bonded to the sheet main body raw fabric 10G on the roll winding source side, and a protective portion 31 that is bonded to the sheet body raw fabric 10G that is attached to the roll unwinding side. placed on the side.

Further, the first cut tape 41 and the second cut tape 42, and the respective original fabrics that will become the first strip-shaped sheet portion 51 and the second strip-shaped sheet portion 52, that is, the first cut tape original fabric 41G and the second cut tape 41G and the second cut tape 42, The second cut tape raw fabric 42G, the first belt-shaped sheet portion raw fabric 51G, and the second band-shaped sheet portion raw fabric 52G are respectively attached to the surface set to the inner surface 10a. The packaging material roll 1R is wound into a roll so that the outer surface 10b to which the protective sheet 30 is attached is located on the outer peripheral surface side. Therefore, each cut tape original fabric 41G, 42G and each belt-shaped sheet portion original fabric 51G, 52G are arranged on the inner peripheral surface side.

The packaging material 1 can be obtained one by one by sequentially cutting the cutting boundaries 1c while unwinding the packaging material material 1G from the packaging material material roll 1R. Furthermore, when unwinding the packaging material roll 1R from the packaging material roll 1R, the protective sheet 30 is first unwound from the protection part 31 that is adhered to the sheet main body roll 10G, and the protective sheet 30 is unwound from the protection part 31 that is adhered to the sheet main body original roll 10G, and the protective sheet 30 is unwound from the protective part 31 that is adhered to the sheet main body original roll 10G. 32 will come later. Therefore, there is no fear that the grip portions 32 of the protective sheet 30 will be turned over, folded, or overlapped, and unwinding can be performed smoothly. Furthermore, if the protective sheet 30 is relatively thick and the grip portion 32 is stiff, the wrapping material roll 1R can be rolled up smoothly without the grip portion 32 being bent.

(Production method)
The packaging material raw roll 1R and the packaging material 1 according to the embodiment are manufactured, for example, by a manufacturing line 60 shown in FIG. 10.

In the manufacturing line 60 shown in FIG. 10, a sheet main body material 10G is unwound in the H direction from a sheet main body material roll 10R and conveyed. The first cut tape material 41G and the second cut tape material unwound from the cut tape material roll 40R are placed on the outer peripheral surface side of the sheet material material material 10G immediately after being unwound from the sheet material material material roll 10R. The strip 42G, and the first strip-shaped sheet portion raw fabric 51G and the second strip-shaped sheet portion raw fabric 52G unwound from the strip-shaped sheet portion raw fabric roll 50R are stacked at predetermined locations, respectively. Next, in the seal section 61, each cut tape original fabric 41G, 42G and each band-shaped sheet part original fabric 51G, 52G are pasted to the sheet main body original fabric 10G. The seal portion 61 has a pasting means such as an ultrasonic seal or a heat seal, but an ultrasonic seal is preferable because wrinkles are less likely to occur in the pasted part and its surroundings.

Next, the plurality of notches 21 of the notch group 20 are formed in the sheet main body original fabric 10G in the notch forming section 62. The plurality of notches 21 are formed by punching out the original sheet body 10G using a plurality of cutters (not shown) having the shape of the notches 21. The notch groups 20 are intermittently formed in the opening start region 11 of each packaging material 1 that is divided into the original sheet body 10G by the above-mentioned cutting boundary 1c.

Next, in the protective sheet pasting section 63, on the surface of the sheet main body raw material 10G opposite to the side to which each cut tape raw material 41G, 42G and each strip-shaped sheet part raw material 51G, 52G were pasted, A protective sheet 30 is adhered. The protective sheets 30 are peeled off one by one from a protective sheet roll 30R pasted on a mount at regular intervals, and are intermittently adhered to the opening start area 11 of each sheet main body 10A. be done.

As described above, each cut tape original fabric 41G, 42G and each band-like sheet portion original fabric 51G, 52G are attached to the sheet main body original fabric 10G, and a plurality of notches of the notch group 20 are formed in the opening start area 11. 21 is formed, and a packaging material original 1G shown in FIG. 9 in which a protective sheet 30 is adhered to the opening start area 11 is manufactured. Then, this packaging material original fabric 1G is wound up to obtain a packaging material original fabric roll 1R. The packaging material 1 can be obtained one by one by unwinding the packaging material material 1G from the packaging material material roll 1R and cutting the sheet main body portion 10A at the cutting boundary 1c.

In the packaging material raw fabric 1G according to the embodiment, a first strip-shaped sheet raw fabric 51G and a second strip-shaped sheet raw fabric 52G extending in the length direction are attached to respective positions near both ends in the width direction. ing. As a result, the first cut tape original fabric 41G, the second cut tape original fabric 42G, and the protective sheet 30 suppress the thickness deviation where the thickness at the center in the width direction increases, and the overall thickness in the width direction is reduced. It can be made uniform. As a result, when the original packaging material roll 1G is wound up to obtain the original packaging material roll 1R, it is possible to suppress the occurrence of twisting due to uneven thickness and poor winding.

According to the embodiment described above, the following effects are achieved.

The packaging material 1 according to the embodiment includes a sheet body 10 that can surround a food 5 as an object to be packaged, and has an inner surface 10a facing the food 5 and an outer surface 10b opposite to the inner surface 10a; a notch group 20 including a plurality of notches 21 that do not open to the edge 10e of the sheet body 10, and a protective sheet 30 that is disposed in the sheet body 10 covering the notch group 20; A first cut tape 41 and a second cut tape 42 extend from the start region 11 in the unsealing direction and are spaced apart from each other in the unsealing cross direction orthogonal to the unsealing direction, and the notch group 20 is arranged in the unsealing cross direction. At least a first end-side notch 21A1 that intersects with the first cut tape 41 and a second end-side notch 21A2 that intersects with the second cut tape 42. Further, among the plurality of notches 21, a pair of notches 21 that are adjacent to each other in the cross-opening direction are arranged apart from each other in the opening direction, and overlap portions that overlap each other when viewed in the opening direction. 23 each.

According to the embodiment, at least two first end side notches 21A1 and a second end side notch 21A2 serve as starting points for tearing to open the sheet body 10, and these two notches 21A1 and 21A2 The opening 13 for opening can be formed between the first cut tape 41 and the second cut tape 42 that intersect. By arranging at least two notches 21 in the cross-opening direction, the width of the opening 13 formed in the sheet body 10 can be increased. Therefore, the width of the opening 13 formed by tearing can be increased.

Further, since at least two notches 21 provide starting points for tearing the sheet body 10, the length of each notch 21 can be made shorter than in the case of one notch, and can be arranged in a dispersed manner. Therefore, reduction in strength of the sheet main body 10 and the packaging material 1 due to the notch 21 can be suppressed. For example, as described above, the packaging material roll 1R is manufactured by winding up the packaging material roll 1G, or the packaging material roll 1G is unwound from the packaging material roll 1R to manufacture the packaging material 1 one by one. In this case, tension is applied to the original packaging material 1G. Even when tension is applied, the decrease in strength is suppressed, so
This prevents stress from concentrating around the notch 21 and causing the original packaging material 1G and the packaging material 1 to break. Furthermore, since each notch 21 is prevented from increasing in size, each of the opening pieces 25A and 25B on the downstream side of the notch 21 in the opening direction becomes easy to turn over, making it easy for the packaging material 1 to be torn inadvertently. occurrence becomes less likely.

That is, the packaging material 1 of the embodiment can increase the width of the opening 13 formed by tearing while suppressing a decrease in strength.

Furthermore, since the force required for tearing can be reduced, it is possible to suppress the occurrence of problems such as excessive force being applied to open the package, which causes the package to open all at once and cause the packaged item to fly out.

In the packaging material 1 according to the embodiment, the notch group 20 has three or more notches 21 including a first end side notch 21A1 and a second end side notch 21A2. It is preferable that the positions of the end-side notch 21A1 and the second end-side notch 21A2 in the unsealing direction are the same.

Thereby, since the number of notches 21 is large, the width of the opening 13 can be increased. Furthermore, cuts 12 are generated almost simultaneously from each of the end 24a of the first end side notch 21A1 and the end 24f of the second end side notch 21A2, which are the starting points of the opening 13, and the tearing force is applied to both the left and right sides. The sheet body 10 can be torn without being biased. Therefore, the sheet main body 10 can be opened smoothly.

In the packaging material 1 according to the embodiment, the notch groups 20 include an upstream notch group 20A including at least one notch 21, and at least one notch 21 arranged downstream of the upstream notch group 20A in the opening direction. a downstream notch group 20B including a downstream notch group 20B, and at least one of the upstream notch group 20A and the downstream notch group 20B is a parallel notch group including a plurality of notches 21 arranged in parallel along the unsealing cross direction. It is.

As a result, the plurality of notches 21 of the parallel notch group parallel to each other in the unsealing cross direction can be distributed between each of the cut tapes 41 and 42, so that a decrease in strength due to the notches 21 can be further suppressed, The width of the opening 13 can be made larger.

In the packaging material 1 according to the embodiment, the number of notches 21 in the upstream notch group 20A is different from the number of notches 21 in the downstream notch group 20B, and the upstream notch group 20A has three notches 21. However, the downstream notch group 20B has two notches 21.

As a result, a plurality of notches 21 can be distributed between each of the cut tapes 41 and 42, so that a decrease in strength due to the notches 21 can be further suppressed, and the width of the opening 13 can be made larger. . Note that the number of notches 21 in the upstream notch group 20A and the number of notches 21 in the downstream notch group 20B may be the same, and in this case as well, similar effects can be obtained.

In the packaging material 1 according to the embodiment, the notch 21 has a length direction extending in a direction perpendicular to the opening direction, and both ends of the notch 21 in the length direction are closer to each other in the opening direction than the center part in the length direction. An example of such a shape is an arc shape.

This makes it easy to tear the sheet body 10 smoothly starting from both ends of the notch 21 located on the side in the opening direction. Even when the sheet body 10 is relatively thick, the sheet body 10 can be smoothly torn and opened easily.

In the packaging material 1 according to the embodiment, the protective sheet 30 is preferably disposed on the outer surface 10b of the sheet body 10.

Thereby, after the sheet body 10 is unsealed, the protective sheet 30 does not remain on the side of the sheet body 10 packaging the food 5. Therefore, the food 5 can be eaten without the protective sheet 30 getting in the way, and it is easy to take out the food from the packaging material 1.

In the packaging material 1 according to the embodiment, the pair of band-shaped sheet parts 51A and 51B extending in the unsealing direction are arranged on the inner surface of the sheet body 10 on the outside of each of the first cut tape 41 and the second cut tape 42. 10a and the outer surface 10b.

Thereby, it is possible to suppress the occurrence of deviation in the overall thickness of the packaging material 1 in the width direction. For this reason, when the original fabric of the packaging material 1 (the above-mentioned original packaging material 1G) is wound up into a roll, it is possible to suppress poor winding due to uneven thickness.

The packaging bag 14 according to the embodiment includes a bag body 14d in which the sheet main body 10 of the packaging material 1 is formed into a bag shape, and an object to be packaged is accommodated inside the bag body 14d.

As a result, in addition to being able to package items by pushing up the packaging material 1 as it is, the packaging material 1 can be processed into a packaging bag 14, and the packaging bag 14 can be filled with a variety of materials such as liquid, powder, and granules. It is possible to accommodate and package objects of various shapes.

The packaging bag 14 according to the embodiment includes a configuration in which the sheet main body 10 is folded and the bag body 14d is formed into a cubic shape.

Thereby, the bag body 14d can be formed into various shapes depending on how the sheet body 10 is folded.

In the packaging material roll 1R according to the embodiment, a packaging material material 1G in which the packaging material 1 is integrated so as to be continuous in the direction in which the band-shaped sheet portion 50 extends is wound into a roll shape.

Thereby, by cutting out a large number of packaging materials 1 from the original packaging material 1G, the packaging material 1 can be easily manufactured. Further, by extending the belt-shaped sheet portion 50, the thickness in the width direction becomes uniform throughout, and it is possible to suppress winding defects due to uneven thickness.

(Modified example of notch group)
Modifications 1 to 5 in which the configuration of the notch group 20, ie, the number and arrangement of the notches 21, etc., are changed in the packaging material 1 of the above embodiment will be described below. These modified examples 1 to 5 have the same configuration as the above embodiment except for changes such as the number and arrangement of notches 21. Therefore, in the following description, the same components as those in the above embodiment are given the same reference numerals, description thereof will be omitted, and only the differences will be described. In addition, in the figures referred to below, the opening direction is shown by an arrow M.

FIG. 11A shows a notch group 20 according to a first modification. The notch group 20 of the first modification has a reverse pattern of the upstream notch group 20A and the downstream notch group 20B of the above embodiment. That is, the upstream notch group 20A has two first notches 21A, and the downstream notch group 20B has three second notches 21B. The second notch 21B on the left side of the downstream notch group 20B is the first end notch 21B1 that intersects the first cut tape 41, and the second notch 21B on the right side is the second notch 21B on the right side. The second end side notch 21B2 intersects the cut tape 42. Each notch 21 has an overlapping portion as shown in FIG. 4B. The shape and size of each notch 21 are the same as in the above embodiment.

In this first modification, when the protective sheet 30 is turned over to open the sheet main body 10, as shown in FIG. 11A, cuts 12 are generated between the notches 21, and the first cut tape and second A cut 12 on the outside of the tape extends in the opening direction. Thereby, as shown in FIG. 11B, an opening 13 extending in the unsealing direction is formed, and the sheet main body 10 is unsealed.

FIG. 12A shows a notch group 20 according to a second modification. The notch group 20 of the second modification includes an upstream notch group 20A having two first notches 21A, and a downstream notch group 20B disposed downstream of the upstream notch group 20A in the opening direction. The downstream notch group 20B may have at least one second notch 21B, in this case one. The upstream notch group 20A in which the two first notches 21A are arranged in parallel in the unsealing cross direction is a parallel notch group. Of the two first notches 21A of the upstream notch group 20A, the left first notch 21A is the first end notch 21A1 that intersects the first cut tape 41, and the right first notch 21A is the first end notch 21A1 that intersects the first cut tape 41. The notch 21A is a second end-side notch 21A2 that intersects the second cut tape 42. Each notch 21 has an overlapping portion as shown in FIG. 4B. The shape of each notch 21 is arcuate and similar to the embodiment, but its length is longer than the notch 21 of the above embodiment.

In this second modification, when the protective sheet 30 is turned over and the sheet main body 10 is unsealed, as shown in FIG. The cut 12 on the outside of the cut tape 42 extends in the opening direction. Thereby, as shown in FIG. 12B, an opening 13 extending in the unsealing direction is formed and the sheet body 10 is unsealed.

Note that when the parallel notch group of two notches 21 and one notch 21 are arranged separately in the length direction of the seat body 10 as in the second modification, a pattern opposite to that of FIG. 12A, That is, one notch 21 may be arranged on the upstream side in the unsealing direction, and a parallel notch group including two notches 21 may be arranged on the downstream side in the unsealing direction. In other words, the downstream notch group 20B may be a parallel notch group including two notches 21, and the upstream notch group 20A may include one notch 21. In that case, the two notches 21 on the downstream side in the unsealing direction are a first end side notch that intersects the first cut tape 41 and a second end side notch that intersects the second cut tape 42. One notch 21 on the upstream side in the unsealing direction has an overlap portion at both ends thereof, which overlaps the two notches 21 on the downstream side in the unsealing direction in the length direction of the sheet body 10. In the case of this reverse pattern, when the protective sheet 30 is turned over, cuts 12 are made from both ends of one notch 21 on the upstream side in the unsealing direction to two notches 21 on the downstream side in the unsealing direction; A cut 12 is formed on the outside of the first cut tape 41 and the second cut tape 42 from the outer ends of each of the two notches 21 . As a result, the opening 13 is formed and the sheet main body 10 is unsealed.

FIG. 13A shows a notch group 20 according to a third modification. The notch group 20 of the third modification includes the upstream notch group 20A and the downstream notch group 20B of the above embodiment, and further includes a second downstream notch group downstream of the downstream notch group 20B in the unsealing direction. 20C is placed. The second downstream notch group 20C includes three third notches 21C arranged in the width direction of the seat body 10. The upstream notch group 20A, the downstream notch group 20B, and the second downstream notch group 20C are all parallel notch groups in which a plurality of notches 21 are arranged in parallel in the unsealing cross direction. Among the three third notches 21C of the second downstream notch group 20C, the left third notch 21C is the first end notch 21C1 that intersects the first cut tape 41, and the right side The third notch 21C is a second end-side notch 21C2 that intersects the second cut tape 42. Each notch 21 has an overlap portion 23 as shown in FIG. 4B. The shape and size of each notch 21 are the same as in the above embodiment.

In this third modification, when the protective sheet 30 is turned over and the sheet main body 10 is unsealed, as shown in FIG. The cut 12 on the outside of the cut tape 42 extends in the opening direction. As a result, as shown in FIG. 13B, an opening 13 extending in the unsealing direction is formed, and the sheet main body 10 is unsealed. According to the third modification, when the protective sheet 30 is turned over and opened, the sheet main body 10 is not turned over from each first notch 21A of the upstream notch group 20A arranged on the most upstream side in the unsealing direction. Even if this happens, the sheet main body 10 can be turned over using each second notch 21B of the next downstream notch group 20B as a starting point. As in the third modification, by providing three rows or a large number of parallel notch groups exceeding three rows in the length direction of the sheet body 10, the sheet body 10 can be reliably opened.

FIG. 14A shows a notch group 20 according to a fourth modification. The notch group 20 of the fourth modification includes an upstream notch group 20A and a downstream notch group 20B arranged downstream of the upstream notch group 20A in the opening direction. The upstream notch group 20A includes two first notches 21A that are arranged in parallel in the width direction of the seat body 10. The downstream notch group 20B has two second notches 21B that are arranged in parallel in the width direction of the seat body 10. That is, the number of notches 21 in the upstream notch group 20A is the same as the number of notches 21 in the downstream notch group 20B. The upstream notch group 20A and the downstream notch group 20B are both parallel notch groups in which two notches 21 are arranged in parallel in the unsealing cross direction.

Of the two first notches 21A of the upstream notch group 20A, the left first notch 21A is the first end notch 21A1 that intersects the first cut tape 41. Furthermore, among the two second notches 21B of the downstream notch group 20B, the second notch 21B on the right side is a second end-side notch 21B2 that intersects the second cut tape 42. Each of the two second notches 21B is offset from the first notch 21A in the width direction of the seat body 10. As a result, each notch 21 has an overlapping portion as shown in FIG. 4B. The shape of each notch 21 is arcuate and similar to the embodiment, but its length is longer than the notch 21 of the above embodiment.

In this fourth modification, when the protective sheet 30 is turned over and the sheet main body 10 is unsealed, as shown in FIG. The cut 12 on the outside of the cut tape 42 extends in the opening direction. Thereby, as shown in FIG. 14B, an opening 13 extending in the unsealing direction is formed and the sheet main body 10 is unsealed.

FIG. 15A shows a notch group 20 according to a fifth modification. The notch group 20 of the fifth modification includes one notch 21 on the upstream side in the unsealing direction and one notch 21 on the downstream side in the unsealing direction. The notch 21 on the upstream side in the unsealing direction is a first end-side notch 21A1 that intersects the first cut tape 41. Further, the notch 21 on the downstream side in the unsealing direction is a second end-side notch 21B2 that intersects the second cut tape 42. The two notches 21 are offset from each other in the width direction of the seat body 10. As a result, each notch 21 has an overlapping portion as shown in FIG. 4B. The shape of each notch 21 is arcuate and similar to the embodiment, but its length is longer than the notches 21 of the second and fourth modifications.

In this fifth modification, when the protective sheet 30 is turned over and the sheet main body 10 is unsealed, as shown in FIG. The cut 12 on the outside of the cut tape 42 extends in the opening direction. As a result, as shown in FIG. 15B, an opening 13 extending in the unsealing direction is formed and the sheet main body 10 is unsealed.

(Variation example of cut tape)
Next, a modification example in which the shapes of the first cut tape 41 and the second cut tape 42 are changed will be described with reference to FIG. 16. FIG. 16 is a plan view of the packaging material 1 similar to FIG. 1, and the same components as in FIG. 1 are given the same reference numerals.

Although the first cut tape 41 and the second cut tape 42 of the modified example extend in the length direction of the sheet main body 10, they are curved instead of being parallel to the length direction and parallel to each other. In FIG. 16, the first cut tape 41 and the second cut tape 42 of the modified example are symmetrical with respect to a line passing through the center of the sheet body 10 in the width direction as a line of symmetry, and with the center of the length direction being symmetrical. It is vertically symmetrical with the line passing through it as the vertically symmetrical line.

Here, as shown in FIG. 16, among the four side edges 10e of the seat body 10, the upper, lower, left, and right edges 10e are respectively divided into an upper edge 10e1, a lower edge 10e2, a left edge 10e3, and a right edge. It is assumed that the edge is 10e4. The first cut tape 41 approaches the left edge 10e3 as it goes from the upper edge 10e1 to the lower edge 10e2, approaches the left edge 10e3 closest to the center in the length direction, and then moves away from the left edge 10e3. , reaches the lower edge 10e2. The second cut tape 42 approaches the right edge 10e4 as it goes from the upper edge 10e1 to the lower edge 10e2, approaches the right edge 10e4 closest to the center in the length direction, and then moves away from the right edge 10e4. , reaches the lower edge 10e2. The first cut tape 41 extends from the upper edge 10e1 to the lower edge 10e2, and is gently curved so as to be convex toward the left edge 10e3. The second cut tape 42 extends from the upper edge 10e1 to the lower edge 10e2 and is gently curved so as to be convex toward the right edge 10e4. The first cut tape 41 and the second cut tape 42 intersect in the vicinity of the upper edge 10e1 and in the vicinity of the lower edge 10e2.

Among the notches 21 of the notch group 20, the left notch 21 on the upstream side in the unsealing direction crosses the first cut tape 41, and the right notch 21 on the upstream side in the unsealing direction crosses the second cut tape 42. intersects with.

According to this modification, when the protective sheet 30 is turned over and the sheet main body 10 is torn and opened, the opening 13 in the embodiment is formed in an elliptical shape between the cut tapes 41 and 42. As a result, a large opening 13 is formed in the center of the packaging material 1, and the width of the opening 13 is small and the area of the sheet body 10 is large on the upstream and downstream sides of the opening 13 in the unsealing direction. Therefore, it is easy to expose the packaged food from the packaging material 1, and it is also easy to grasp the food without touching the food. In other words, food can be eaten hygienically and easily.

In addition, in this modification, as shown by the two-dot chain line in FIG. 16, the opening start region 11 may be arranged closer to the upper edge 10e1. In that case, each of the first end side notch and the second end side notch in the notch group 20 is appropriately arranged so as to intersect each cut tape 41, 42 and can serve as a starting point for opening. let Furthermore, the intersection of the first cut tape 41 and the second cut tape 42 is arranged at a position a little further away from the upper edge 10e1 toward the center in the length direction of the sheet body 10 than the position shown in FIG. , the notch group 20 may be arranged closer to the upper edge 10e1 than the intersection of the first cut tape 41 and the second cut tape 42. Note that the configuration of the notch group 20 is not limited to that shown in FIG. 16, and for example, it is also possible to employ each modification of the notch group 20 described above.

Although the packaging material 1 according to the embodiment and each modification based on the embodiment have been described above, the present invention is not limited to these embodiments and modifications, and can be modified as appropriate.

For example, the shape of the notch 21 is not limited to a circular arc shape, but may be an inverted V shape or a trapezoid shape that is convex toward the upstream side in the opening direction. Furthermore, in addition to these inverted V-shapes and trapezoidal shapes, there are shapes in which both longitudinal ends of the sheet body 10 along the width direction are located downstream in the opening direction from the longitudinal center. It's good to be there. With such a shape, when the sheet main body 10 is torn, a cut that extends in the opening direction starting from the notch 21 is likely to occur, making opening easier.

The number of notches 21 in the notch group 20 is arbitrary, and the number of parallel notch groups including a plurality of notches 21 may exceed the three rows of the third modification described above and may be four or more rows.

The shape of the notch may be the same in the notch group, but the notch group may be composed of a plurality of notches having different shapes.

1 Packaging material 1G Packaging material roll 1R Packaging material roll 5 Food (packaged item)
10 Sheet body 10a Inner surface of sheet body 10b Outer surface of sheet body 10e Edge of sheet body 11 Opening start area 14 Packaging bag 14d Bag body 20 Notch group 20A Upstream notch group 20B Downstream notch group 21 Notch 21A1 First end Side notch 21A2 Second end notch 21B1 First end notch 21B2 Second end notch 21C1 First end notch 21C2 Second end notch 23 Overlap portion 30 Protective sheet 41 First cut tape 42 Second cut tape 50 Band-shaped sheet part

Claims (14)

a sheet main body capable of surrounding an object to be packaged and having an inner surface facing the object to be packaged and an outer surface opposite to the inner surface;
a notch group including a plurality of notches arranged in an opening start area set on the sheet body and not opening at an edge of the sheet body;
a protective sheet disposed on the sheet body to cover the notch group;
A packaging material comprising a first cut tape and a second cut tape extending in the opening direction from at least the opening start area,
The first cut tape and the second cut tape are at least partially spaced apart from each other in an unsealing cross direction orthogonal to the unsealing direction,
The notch group is
It includes a plurality of notches arranged in the unsealing cross direction, and at least a first end side notch that intersects the first cut tape and a second end that intersects the second cut tape. a side notch;
Furthermore, among the plurality of notches, a pair of notches adjacent to each other in the cross-opening direction are arranged apart from each other in the opening direction, and each has an overlapping portion that overlaps with each other when viewed in the opening direction. packaging material. The notch group has three or more notches including the first end-side notch and the second end-side notch, and the first end-side notch and the second end-side notch include the first end-side notch and the second end-side notch. The packaging material according to claim 1, wherein the end side notches are at the same position in the opening direction. The notch group is
an upstream notch group including at least one of the notches;
a downstream notch group including at least one notch located downstream of the upstream notch group in the unsealing direction;
The package according to claim 1 or 2, wherein at least one of the upstream notch group and the downstream notch group is a parallel notch group including a plurality of notches arranged in parallel along the opening cross direction. Material. the number of notches in the upstream notch group;
The packaging material according to claim 3, wherein the number of notches in the downstream notch group is different. the number of notches in the upstream notch group;
The packaging material according to claim 3, wherein the number of notches in the downstream notch group is the same. The upstream notch group has three notches,
The packaging material according to claim 4, wherein the downstream notch group has two notches. The notch has a length direction extending in the unsealing cross direction, and has a shape in which both ends in the length direction are located downstream in the unsealing direction from a central part in the length direction. The packaging material according to any one of claims 1 to 6. 8. The packaging material according to claim 7, wherein the notch has a shape that is convex toward the upstream side in the opening direction, and has any one of a circular arc shape, an inverted V shape, and a trapezoid shape. The packaging material according to any one of claims 1 to 8, wherein the first cut tape and the second cut tape have portions that intersect with each other. The packaging material according to any one of claims 1 to 9, wherein the protective sheet is arranged on the outer surface of the sheet main body. A pair of band-shaped sheet portions extending in the unsealing direction are arranged on at least one of an inner surface and an outer surface of the sheet body on the outside of each of the first cut tape and the second cut tape. , the packaging material according to any one of claims 1 to 10. A packaging bag, wherein the sheet main body of the packaging material according to any one of claims 1 to 11 includes a bag body formed in a bag shape, and an object to be packaged is accommodated inside the bag body. The packaging bag according to claim 12, wherein the sheet body is folded to form the bag body into a cubic shape. A packaging material roll, comprising a packaging material roll in which the packaging material according to claim 11 is integrated so as to be continuous in the direction in which the band-shaped sheet portion extends.

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