JP2023174036A - Packaging material, original roll thereof and packaging bag - Google Patents

Abstract

To provide a packaging material capable of ensuring a consistent width of a belt-like opening formed in the packaging material upon unsealing.SOLUTION: A packaging material comprises a sheet body 10, a plurality of cut tapes 40 extending in an unsealing direction, a notch 11 formed in the unsealing start region of the sheet body 10, an unsealing piece 20 formed on the unsealing direction side of the notch 11, and a protective sheet 30 arranged on the sheet body 10 to cover the notch 11. The plurality of cut tapes 40 have straight line-cuttability along the unsealing direction. The plurality of cut tapes 40 include at least a first cut tape 41 arranged on one endmost side in an unsealing crossing direction orthogonal to the unsealing direction, and a second cut tape 42 arranged on the other endmost side. The notch 11 is arranged from the first cut tape 41 to the second cut tape 42. One end of the notch 11 is arranged within the width of the first cut tape 41, and the other end of the notch 11 is arranged within the width of the second cut tape 42.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 in which a band-shaped opening is formed that exposes the food inside by tearing the packaging material by pinching the opening piece, which is the starting point for opening, with fingers.

This packaging material is equipped with a cut tape that makes it possible to ensure an opening of sufficient length. In other words, when the packaging material is torn starting from the opening piece, the band-shaped cut pieces that are continuous with the opening piece are turned outward while creating cuts on both sides in the width direction, and an opening is formed between the pair of cuts. becomes. Here, even if at least one of the pair of cuts turns inward, the presence of the cut tape prevents the cut from cutting inward any further and extends along the cut tape. This prevents the cut pieces from being interrupted and ensures the width of the opening.

Japanese Patent Application Publication No. 2003-341715

In the above conventional packaging material, the width of the opening formed by tearing is ensured by the cut tape. However, there is nothing to prevent the pair of cuts produced by turning over the cut pieces from expanding outward. Therefore, there is a possibility that the width of the opening becomes larger than the desired width. If the width of the opening is too wide, problems may occur such as food falling through the opening or difficulty in grasping the food through the packaging material, so there is room for improvement.

Therefore, the main object of the present invention is to provide a packaging material in which the width of a band-shaped opening formed in the packaging material upon opening can be made constant.

(1) The packaging material of the present invention includes a sheet body that can surround an object to be packaged and has an opening start area set at a predetermined location, and a sheet body that is provided on the sheet body and extends in the opening direction from at least the opening start area. a plurality of cut tapes, a notch formed in the unsealing start region, an unsealing piece formed on the side of the notch in the unsealing direction in the unsealing start region due to the formation of the notch, and the notch a protective sheet disposed on the sheet main body to cover the packaging material, each of the plurality of cut tapes having a straight-line cut property along the opening direction, and each of the plurality of cut tapes having a , at least a first cut tape disposed closest to one end in an unsealing cross direction orthogonal to the unsealing direction, and a second cut tape disposed furthest to the other end; The notch is arranged from the first cut tape to the second cut tape, one end of the notch is arranged within the width of the first cut tape, and the other end of the notch is arranged within the width of the second cut tape. located within.

(2) In (1), a pair of belt-shaped sheet portions extending in the unsealing direction are arranged on the outside of the sheet main body in the unsealing cross direction of the first cut tape and the second cut tape. It is preferable that

(3) The packaging bag of the present invention includes a bag body in which the sheet main body of the packaging material of (1) or (2) is formed into a bag shape, and an object to be packaged is housed inside the bag body. It is.

(4) In (3), the bag body may be formed into a three-dimensional shape by folding the sheet body.

(5) In the packaging material roll of the present invention, the packaging material material roll in which the packaging material of (2) is integrated so as to be continuous in the direction in which the band-shaped sheet portion extends is wound into a roll shape. It is something that

According to the present invention, it is possible to provide a packaging material in which the width of a band-shaped opening formed in the packaging material upon opening can be made constant.

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. 2 is a perspective view showing a state in which food is packaged with the packaging material according to the embodiment. It is a perspective view showing the state where the packaging material concerning an embodiment is opened. 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 partially enlarged plan view of a packaging material showing a notch according to a first modification of the embodiment. It is a partially enlarged plan view of a packaging material showing a notch and a cut tape according to a second modification of the embodiment.

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. 4 is an enlarged view showing the opening start area 15 set on the packaging material 1 and its surroundings. 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 plurality of cut tapes 40, and a band-shaped sheet portion 50. Be prepared. In FIGS. 1 to 4, the length direction of the packaging material 1 and the sheet main 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 FIG. 1, the packaging material 1 has a symmetrical configuration with a center line P passing through the center in the width direction as a line of symmetry.

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. Further, the sheet body 10 has edges 10e including four edges 10e1, 10e2, 10e3, and 10e4. Hereinafter, based on FIG. 1, these edges will be referred to as an upper edge 10e1, a lower edge 10e2, a left edge 10e3, and a right edge 10e4. 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 15 is set at a predetermined location on the upper edge 10e1 side, which is the central part in the width direction of the sheet body 10 and one end side in the length direction. The sheet body 10 is torn and opened along the unsealing direction (indicated by arrow M in FIGS. 1 to 6) from the unsealing start area 15 toward the lower edge 10e2. The unsealing direction is along the length direction of the sheet body 10.

A notch 11 is formed in the opening start area 15. The notch 11 is a cut line that penetrates from the outer surface 10b to the inner surface 10a. As shown in FIGS. 1 and 4, the notch 11 is formed in a flat inverted U shape and is arranged from the first cut tape 41 to the second cut tape 42.

The notch 11 is continuous with an intersection portion 11a extending in the width direction of the seat body 10, a first guide portion 11b that is continuous with the intersection portion 11a and constitutes one end on the left edge 10e3 side of the notch 11, and is continuous with the intersection portion 11a. and a second guide portion 11c constituting the other end of the notch 11 on the right side edge 10e4 side. The first guide portion 11b is bent from one end of the intersection portion 11a toward the lower edge 10e2 and extends in the length direction of the seat body 10. The second guide portion 11c is bent from the other end of the intersection portion 11a toward the lower edge 10e2 and extends in the length direction of the seat body 10. The notch 11 is not open to any of the edges 10e of the seat body 10, that is, the upper edge 10e1, the lower edge 10e2, the left edge 10e3, and the right edge 10e4.

By forming the notch 11, an opening piece 20 is formed on the side of the notch 11 in the opening direction. The opening piece 20 is arranged within the opening start area 15. The unsealing piece 20 is a portion of the sheet body 10 surrounded by the notch 11, and is a portion that allows a part of the sheet body 10 to be turned over toward the outer surface 10b in the unsealing direction. When the unsealing piece 20 is turned over toward the outer surface 10b, the sheet body 10 can be torn in the unsealing direction starting from the first guide portion 11b and the second guide portion 11c of the notch 11. .

In addition, the notch 11 may be a continuous linear cut line or a discontinuous linear cut line having an uncut portion. For example, the length of the cut portion and the uncut portion is 1 mm or more and the cut lines are continuous alternately (sometimes called perforations), or the length of the cut portion and the uncut portion is even shorter, for example, 0.9 mm or less. It may be a score line that continues alternately (sometimes called a micro-joint), or a score line that has an uncut portion at least at one location along the way (sometimes called a joint).

The cut tape 40 of the embodiment includes two band-shaped cut tapes, that is, a first cut tape 41 and a second cut tape 42. The width of the first cut tape 41 and the width of the second cut tape 42 are the same. The first cut tape 41 passes through one end of the opening start area 15 in the width direction (the left side in FIG. 1), and passes through the other end of the opening start area 15 in the width direction (the right end in FIG. 1). A second cut tape 42 is passing through. 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 of the sheet body 10 in the length direction. Therefore, the first cut tape 41 and the second cut tape 42 are parallel to each other and spaced apart from each other in the unsealing cross direction orthogonal to the unsealing direction.

In the embodiment, 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.

The first cut tape 41 and the second cut tape 42 have a straight line cut property in one direction, and one direction is the length direction of themselves, that is, the opening direction of the packaging material 1. Having the ability to cut in a straight line in one direction (also referred to as having directionality) means that when cutting in the straight line direction, it can be cut straight along that direction without stress, and it can also be cut across the direction of the cut. It is said to have the property of being relatively difficult to tear in the direction in which it is cut. Therefore, the first cut tape 41 and the second cut tape 42 can be easily cut straight in the opening direction.

For the first cut tape 41 and the second cut tape 42, a directional film that has the above-mentioned linear cutting property and is flexible is used. Examples of such a directional film include a uniaxially stretched thermoplastic synthetic resin film and a biaxially stretched thermoplastic synthetic resin film that has significantly greater orientation in one direction than in the other direction. Specific examples include polyester films, polyamide films, and polypropylene films.

As shown in FIG. 4, the first guide portion 11b of the notch 11 is arranged within the width of the first cut tape 41. As shown in FIG. The first guide portion 11b is disposed approximately at the center of the first cut tape 41 in the width direction and extends in the unsealing direction. Further, the second guide portion 11c of the notch 11 is arranged within the width of the second cut tape 42. The second guide portion 11c is disposed approximately in the middle of the second cut tape 42 in the width direction and extends in the unsealing direction.

Note that 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 sandwiched therebetween. .

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. The opening piece 20 is turned over to the outer surface 10b side via the protective sheet 30. Although the shape of the protective sheet 30 in the embodiment is rectangular, the shape of the protective sheet 30 is not limited to this, and may be, for example, square, circular, oval, etc. The shape may be similar to the shape of the packaged object.

The protective sheet 30 includes a protective section 31 and a knob section 32. The protection part 31 is adhered to the outer surface 10b including the opening piece 20, and covers the notch 11. The protection part 31 is joined to the entire area of the opening piece 20 and the surrounding area of the opening piece 20 by means of adhesive, heat sealing, or the like. The entire area of the protective portion 31 is adhered to the outer surface 10b, and the notch 11 is closed by the protective portion 31. Therefore, the notch 11 is separated from the outside by the protection part 31. The knob portion 32 is a rectangular film piece that continues from the protection portion 31 toward the upper edge 10e1. This knob portion 32 is not adhered to the outer surface 10b, and can be pinched with fingers and turned over so as to be separated from the outer surface 10b. The adhesive area of the protection part 31 to the outer surface 10b is approximately equal to the opening start area 15. Note that the protective sheet 30 may be placed on the inner surface 10a side of the sheet main body 10. In that case, the protection part 31 covers the notch 11 and is adhered to the inner surface 10a.

In the protective sheet 30, when the flipped knob 32 is strongly pulled toward the protective portion 31 (in the opening direction), the portion of the protective sheet 31 that is closer to the knob 32 than the notch 11 is peeled off from the outer surface 10b. When the protective sheet 30 is continued to be pulled, the unsealing piece 20 follows the protective sheet 30 while remaining adhered to the protective part 31 and is turned over, and then, as shown in FIG. A first cut 12a is formed in the notch 11, and a second cut 12b is formed on the extension line of the second guide portion 11c of the notch 11. Thereby, the sheet main body 10 is partially torn along the length direction, and the packaging material 1 is opened. The action of opening will be explained in detail later.

As shown in FIGS. 1 to 3, on the inner surface 10a of the seat body 10, a pair of left and right belt-shaped sheet portions 50 extending in the length direction of the seat body 10 are arranged. The band-shaped sheet portions 50 are arranged on both sides of the cut tape 40 in the width direction. The strip-shaped sheet portion 50 includes a first strip-shaped sheet portion 51 and a second strip-shaped sheet portion 52. The first belt-shaped sheet portion 51 is arranged between the first cut tape 41 and the left edge 10e3. The second belt-shaped sheet portion 52 is arranged between the second cut tape 42 and the right edge 10e4. These belt-shaped sheet portions 51 and 52 are approximately parallel to the cut tape 40. 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 the first belt-shaped sheet portion 51 and the second belt-shaped sheet portion 52 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 in between. Good too.

The sheet main body 10, the protective sheet 30, and each band-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 polyethylene (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.

The first cut tape 41 and the second cut tape 42 are flexible as described above, and are directional films that can be cut in a straight line along their length. The first cut tape 41 and the second cut tape 42 may be transparent or translucent films. For the sheet main body 10, the protective sheet 30, and each of the belt-like sheet parts 51 and 52, a resin film that does not have straight-line cut properties may be used. Note that at least one of the sheet body 10, the protective sheet 30, and each of the belt-like sheet parts 51 and 52 may be made of a material other than the resin film, such as paper or nonwoven fabric.

The thickness of the resin films forming the sheet body 10, the protective sheet 30, the first cut tape 41, the second cut tape 42, and each of the band-shaped sheet parts 51 and 52 may be the same. However, it is desirable that the protective sheet 30 be relatively thick and stiff in order to prevent the knob 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 packaged state. The packaging material 1 in which the food 5 is packaged has a sheet main body 10 in a state in which the length direction is approximately parallel to the length direction of the food 5, and a notch 11 and a protective sheet 30 are formed slightly in the center of the front surface at one end in the length direction. Placed.

The action when opening the packaging material 1 will be explained. When you pinch the knob 32 of the protective sheet 30 with your fingers and turn it over toward the outer surface 10b and pull it toward the protective section 31, which is the opening direction, the portion of the protective sheet 31 that is closer to the knob 32 than the notch 11 will be removed from the outer surface 10b. Peel off. When the knob 32 is subsequently pulled in the unsealing direction, the unsealing piece 20 adhered to and overlapping the protective part 31 is turned over toward the outer surface 10b, following the protective part 31, starting from the intersection 11a of the notch 11. When the knob 32 is further pulled in the unsealing direction, as shown in FIG. A second cut 12b is formed on the extension line of the second guide portion 11c. As a result, the band-shaped cut piece 21 continuous with the opening piece 20 is turned over. The cut piece 21 is a part of the sheet body 10.

When the cut piece 21 is turned over in this manner, a strip-shaped opening 13 extending in the length direction is formed between the first cut 12a and the second cut 12b. The packaging material 1 is divided into left and right sides by the opening 13, and the food 5 can be eaten through the opening 13 while being held in the hand. Alternatively, the food 5 can be taken out through the opening 13. The cut piece 21 may be torn off and separated from the packaging material 1, or may be left alone.

When the packaging material 1 is opened as described above, the first cut 12a is formed approximately at the center of the first cut tape 41 in the width direction. Further, the second cut 12b is formed approximately at the center of the second cut tape 42 in the width direction. Here, both the first cut tape 41 and the second cut tape 42 have linear cutting properties along the opening direction. Therefore, the first cut 12a is guided by the straight cut property of the first cut tape 41 and extends straight along the unsealing direction approximately in the middle of the width direction. Further, the second cut 12b is guided by the linear cutting property of the second cut tape 42 and extends straight along the unsealing direction approximately in the middle of the width direction. Therefore, the course of both the first cut 12a and the second cut 12b is prevented from changing inward or outward. As a result, the width of the band-shaped opening 13 formed in the packaging material 1 by opening becomes substantially constant. Furthermore, it is unlikely that the width of the opening 13 will increase or that the first cut 12a and the second cut 12b will merge with each other and the opening 13 will disappear.

The first cut tape 41 is divided into two in the width direction by the first cut 12a, and the divided widthwise inner part is torn while adhering to the inner surface of the cut piece 21, and the divided widthwise outer part is It remains on the inner surface 10a on the side of the sheet body 10 that wraps the food 5. The second cut tape 42 is divided into two parts in the width direction by the second cut 12b, the inner part in the width direction is torn while adhering to the inner surface of the cut piece 21, and the outer part in the width direction is divided into two parts. It remains on the inner surface 10a on the side of the sheet body 10 that wraps the food 5.

(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. 7, 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 to each other on the other end side in the length direction (lower end side in FIG. 6) 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. This packaging bag 14 has the form of a so-called pillow packaging bag. The packaging bag 14 can contain and package, for example, bulk foods such as rice balls, sandwiches, cooked bread, and hamburgers, and objects to be packaged in liquid, powder, and granule forms. After accommodating the object to be packaged, 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.

(Packaging material roll)
A large number of the packaging material 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 body parts 10A is provided with a notch 11 and an unsealing piece 20, and a protective sheet 30 that closes the notch 11 is adhered to the surface set to 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. Each of the first raw cut tape 41G and the second raw cut tape 42G has straight-line cutting properties along the length direction thereof. 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.

(Method for producing packaging material roll)
The packaging material roll 1R according to the embodiment is manufactured, for example, by a manufacturing line 60 shown in FIG. 9 .

In the manufacturing line 60 shown in FIG. 9, a sheet main body material 10G is unwound in the H direction from a sheet main body material roll 10R and is 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 notch 11 is formed in the sheet main body original fabric 10G by the notch forming section 62. The notch 11 is formed by punching out the sheet main body material 10G, the first cut tape material 41G, and the second cut tape material 42G using a cutter (not shown) having the shape of the notch 11. The notches 11 are intermittently formed in the opening start region 15 of each packaging material 1, which 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 unsealing start area 15 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 pasted to the sheet main body original fabric 10G, and the notch 11 is formed in the opening start area 15, and the opening start area 15 is formed. An original packaging material 1G shown in FIG. 8 in which the protective sheet 30 is adhered to the starting area 15 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.

As described above, each cut tape original fabric 41G, 42G and each band-like sheet portion original fabric 51G, 52G are pasted to the sheet main body original fabric 10G, and the notch 11 is formed in the opening start area 15, and the opening start area 15 is formed. An original packaging material 1G shown in FIG. 8 in which the protective sheet 30 is adhered to the starting area 15 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 main body 10 that can surround a food 5 as an object to be packaged, and has an opening start region 15 set at a predetermined location, and a sheet main body 10 that is provided on the sheet main body 10 and that extends from at least the unsealing start region 15. A plurality of cut tapes 40 extending in the unsealing direction, a notch 11 formed in the unsealing start region 15, and the notch 11 are formed on the unsealing direction side of the notch 11 in the unsealing start region 15. It includes an opening piece 20 and a protective sheet 30 disposed on the sheet body 10 to cover the notch 11, and each of the plurality of cut tapes 40 has straight cutability along the opening direction, and has a plurality of cut tapes 40. The cut tape 40 includes at least a first cut tape 41 disposed closest to one end in the unsealing crossing direction orthogonal to the unsealing direction, and a second cut tape 42 disposed closest to the other end, The notch 11 is arranged from the first cut tape 41 to the second cut tape 42, and the first guide part 11b constituting one end of the notch 11 is arranged within the width of the first cut tape 41, and the notch The second guide portion 11c constituting the other end of the cut tape 11 is disposed within the width of the second cut tape 42.

According to the packaging material 1 according to the embodiment, by pinching the opening piece 20 that has been turned over to the outer surface 10b of the sheet body 10 and pulling it in the opening direction, the sheet body 10 is torn, a band-shaped opening 13 is formed, and the sheet can be opened. be done. The opening 13 includes a first cut 12a formed extending from the first guide part 11b of the notch 11 in the opening direction, and a first cut 12a formed extending from the second guide part 11c of the notch 11 in the opening direction. It is formed in a band shape between the two cuts 12b. The first cut tape 41 on which the first guide part 11b is arranged and the second cut tape 42 on which the second guide part 11c is arranged both have straight-line cutting properties along the opening direction. Therefore, each of the first cut 12a and the second cut 12b is guided by the linear cutting properties of the first cut tape 41 and the second cut tape 42, and extends straight in the opening direction. Thereby, the band-shaped opening 13 formed in the packaging material 1 can be formed to have a constant width without expanding or disappearing.

Since a first guide part 11b and a second guide part 11c extending in the opening direction are formed at both ends of the notch 11, the first cut 12a and the second guide part 11c are guided by these guide parts 11b and 11c. The cut 12b is formed smoothly in the opening direction.

Directional films that can be cut in straight lines are more expensive than non-directional films. Therefore, if a non-directional film is used for the films other than the cut tape 40 (the sheet main body 10, the protective sheet 30, and the strip-like sheet portion 50) and a directional film is used only for the cut tape 40, material costs can be reduced and manufacturing costs can be reduced. can be suppressed. Further, the cut tape 40 has two cut tapes, that is, a first cut tape 41 and a second cut tape 42, and a first cut tape formed along these cut tapes 41 and 42 when the package is opened. The cut 12a and the second cut 12b are formed straight without protruding from each cut tape 41, 42 even if each cut tape 41, 42 is thin. Therefore, by narrowing the width of each cut tape 41, 42, material costs can be reduced, and manufacturing costs can also be reduced.

In the packaging material 1 according to the embodiment, the pair of belt-shaped sheet portions 51A and 51B extending in the unsealing direction are located outside of the first cut tape 41 and the second cut tape 42 in the unsealing cross direction of the sheet main body 10. It is preferable that the

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.

The packaging material roll 1R according to the embodiment is a packaging material raw roll in which the packaging material 1 is integrated so as to be continuous in the direction in which the first strip-shaped sheet portion 51 and the second strip-shaped sheet portion 52 extend. 1G is wound into a roll.

Thereby, a plurality of packaging materials 1 can be easily manufactured by cutting out a plurality of packaging materials 1 from the original packaging material 1G. Moreover, by extending the first strip-shaped sheet portion 51 and the second strip-shaped sheet portion 52 on the outside in the unsealing direction of the first cut tape 41 and the second cut tape 42, the above-mentioned original packaging material 1G is During manufacturing, when winding up the packaging material material 1G, which is the material of the packaging material 1, into a roll to form the packaging material material roll 1R, it is possible to suppress winding defects due to uneven thickness.

Next, with reference to FIGS. 10 and 11, a first modification example and a second modification example in which a part of the above embodiment is modified will be described. In FIGS. 10 and 11, the same components as in the above embodiment are denoted by the same reference numerals, and their description will be omitted.

(First modification)
FIG. 10 is a partially enlarged plan view of a packaging material including a notch 71 according to a first modification. In the first modification, the notch 71 includes a plurality (in this case, five) of notch portions 71a having the same shape and size. The notch portion 71a is a cut line that penetrates from the outer surface 10b of the seat body 10 to the inner surface 10a. The notch portion 71a has a symmetrical arc shape that is gently convex toward the upstream side (upper side in FIG. 10) in the unsealing direction. In addition, when a notch is formed by a combination of multiple notch parts, the notches are not limited to the same shape and the same size, and even if the notch is formed by a combination of different shapes and different dimensions. good.

As shown in FIG. 10, when viewed from above, the five notches 71a are alternately shifted from one end side in the width direction of the seat body 10 to the other end side in the length direction of the seat body 10. They are arranged in a staggered pattern and symmetrically on the other end. In this case, three notches 71a are arranged on the upstream side in the unsealing direction, and two notches 71a are arranged on the downstream side (lower side in FIG. 10) in the unsealing direction. A pair of notch portions 71a adjacent in the width direction and offset from each other in the unsealing direction (lengthwise direction of the sheet body 10) have portions that overlap with each other when viewed in the unsealing direction. Each of the mountain-shaped portions on the downstream side in the unsealing direction of each notch portion 71a serves as an unsealing piece 75.

The left end 72a, which is one end of the left end notch portion 71b closest to the left edge 10e3, which is the leftmost side in FIG. 10, is arranged within the width of the first cut tape 41. The right end 72b, which is the other end of the right notch portion 71c that is closest to the right edge 10e4 and is closest to the right edge 10e4 in FIG. 10, is disposed within the width of the second cut tape 42.

According to the first modification, when the protective sheet 30 is pulled in the unsealing direction by pinching the knob 32, each unsealing piece 75 corresponding to the three notches 71a on the upstream side in the unsealing direction is turned over toward the outer surface 10b, Cuts are made in the opening direction from both ends of these three notches 71a. A first cut 12a that extends along the first cut tape 41 is generated from the left end 72a of the left end notch portion 71b, and a first cut 12a that progresses along the second cut tape 42 is created from the right end 72b of the right end notch portion 71c. A second cut 12b is created. The cuts 12g other than the first cuts 12a and the second cuts 12b at both ends in the width direction reach one of the notches 71a on the downstream side in the opening direction. Then, the five notches 71a are continuous through the cuts 12g. When the protective sheet 30 is further pulled in the unsealing direction from this state, each unsealing piece 75 is turned over as one unsealing piece, and the sheet main body 10 is torn. This creates a gap between the first cut 12a extending in the first cut tape 41 along the unsealing direction and the second cut 12b extending in the second cut tape 42 along the unsealing direction. Then, a band-shaped opening is formed and the packaging material 1 is opened.

Also in the first modification, the first cut 12a is guided by the linear cutability of the first cut tape 41 and progresses straight in the opening direction, and the second cut 12b is guided by the linear cuttability of the second cut tape 42. Guided by this, it progresses straight in the direction of opening. Thereby, the width of the opening formed between the first cut 12a and the second cut 12b becomes substantially constant.

(Second modification)
FIG. 11 is a partially enlarged plan view of a packaging material including a notch 11 and a cut tape 40 according to a second modification. The cut tape 40 of the second modification includes a third cut tape 43 in addition to the first cut tape 41 and the second cut tape 42 of the above embodiment. The third cut tape 43 is arranged between the first cut tape 41 and the second cut tape 42.

In the unsealing cross direction orthogonal to the unsealing direction, the first cut tape 41 is placed closest to one end (left side in FIG. 11), and the second cut tape 42 is placed closest to the other end (right side in FIG. 11). ing. The third cut tape 43 extends along the unsealing direction and is parallel to the first cut tape 41 and the second cut tape 42. The width of the third cut tape 43 is larger than the widths of the first cut tape 41 and the second cut tape 42.

The third cut tape 43 is arranged between the center line P of the sheet body 10 and the second cut tape 42. Therefore, the distance in the width direction between the first cut tape 41 and the third cut tape 43 is smaller than the distance in the width direction between the second cut tape 42 and the third cut tape 43. big.

The third cut tape 43 is attached to the inner surface 10a of the sheet body 10 by means of ultrasonic sealing, heat sealing, adhesive coating, or the like. Note that the third cut tape 43 may be placed on the outer surface 10b of the sheet main body 10, or may be placed on both the inner surface 10a and the outer surface 10b with the sheet main body 10 interposed therebetween.

The notch 11 of the second modification has a configuration in which a third guide portion 11d is added to the notch 11 of the above embodiment. The third guide portion 11d is a cut line continuous with the intersection portion 11a, and extends from the intersection portion 11a in the unsealing direction. This third guide portion 11d is arranged within the width of the third cut tape 43. The third guide portion 11d is arranged approximately at the center of the third cut tape 43 in the width direction. The opening piece 20 of the second modification includes a first opening piece 20a on the first cut tape 41 side and a second opening piece on the second cut tape 42 side, with the third guide part 11d as a border. It is separated into 20b.

A perforation 35 is formed in the protective sheet 30 of the second modification example, which extends in the opening direction continuously from the third guide portion 11d. The perforations 35 include a protection section side perforation 35a formed on the protection section 31 side and a knob section side perforation 35b formed on the knob section 32 side. The knob part 32 of the protective sheet 30 of the second modification has a first knob part 32a on the first cut tape 41 side and a second cut tape 42 with the knob side perforation 35b as the border. A second knob portion 32b on the side. By tearing the knob side perforations 35b, the knob 32 can be separated into a first knob 32a and a second knob 32b.

According to the second modification, by pinching and pulling the separated first knob 32a in the opening direction, the first opening piece 20a is turned over, and the first The cut 12a develops in the first cut tape 41 along the unsealing direction. At the same time, a third cut 12c is generated from the third guide portion 11d of the notch 11 in the unsealing direction, and this third cut 12c develops in the third cut tape 43 along the unsealing direction. . When the third cut 12c passes through the protection part 31, the protection part side perforation 35a also follows and is torn in the opening direction. That is, the sheet main body 10 and the protective portion 31 are torn at the same time. As a result, a strip-shaped opening (referred to as a first opening) is formed between the first cut 12a and the third cut 12c, and the packaging material 1 is opened. The first cut 12a is guided by the linear cutting property of the first cut tape 41 and progresses straight in the opening direction, and the third cut 12c is guided by the linear cutting property of the third cutting tape 43 and progresses in the opening direction. progress straight to. Thereby, the width of the first opening becomes substantially constant.

On the other hand, when the separated second knob part 32b is pinched and pulled in the opening direction, the second opening piece 20b is turned over, and the second cut 12b generated from the second guide part 11c of the notch 11 is opened. It develops in the cut tape 42 along the unsealing direction. At the same time, a third cut 12c is generated from the third guide portion 11d of the notch 11 in the unsealing direction, and this third cut 12c develops in the third cut tape 43 along the unsealing direction. . When the third cut 12c passes through the protection part 31, the protection part side perforation 35a also follows and is torn in the opening direction. That is, the sheet main body 10 and the protective portion 31 are torn at the same time. As a result, a band-shaped opening (referred to as a second opening) is formed between the second cut 12b and the third cut 12c, and the packaging material 1 is opened. The second cut 12b is guided by the linear cutting property of the second cut tape 42 and progresses straight in the opening direction, and the third cut 12c is guided by the linear cutting property of the third cutting tape 43 and progresses in the opening direction. progress straight to. As a result, the width of the second opening is also approximately constant.

Since the distance between the first cut tape 41 and the third cut tape 43 is larger than the distance between the second cut tape 42 and the third cut tape 43, the width of the first opening is It is larger than the width of the second opening. In the second modification, by selecting either the first knob part 32a or the second knob part 32b, the width of the opening at the time of opening can be made different. That is, two opening patterns with different opening widths can be selected.

In the second modification, the entire opening piece 20 is opened by pulling the knob 32 in the unsealing direction without separating the knob 32 into the first knob 32a and the second knob 32b. You can flip it over and open it. In that case, similarly to the embodiment described above, first cuts 12a and second cuts 12b are formed along the first cut tape 41 and second cut tape 42 on both sides, and these cuts 12a , 12b, and the packaging material 1 is opened. If this opening pattern is included, three opening patterns with different opening widths can be selected in the second modification.

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 11 is arbitrary. For example, unlike the first guide part 11b and the second guide part 11c of the above embodiment, both ends do not have a part extending in the opening direction, but are simply linear cuts extending in the opening cross direction, The both ends may be arranged within the widths of the first cut tape 41 and the second cut tape 42, respectively. Further, the sheet body 10 may be made of a directional film that can be cut in a straight line along the opening direction.

1 Packaging material 1G Packaging material roll 1R Packaging material roll 5 Food (packaged item)
10 Sheet main body 10a Inner surface of sheet main body 10b Outer surface of sheet main body 10e Edge of sheet main body 11, 71 Notch 14 Packaging bag 14d Bag body 15 Opening start area 20, 75 Opening piece 30 Protective sheet 40 Cut tape 41 First cut tape 42 Second cut tape 50 Band-shaped sheet portion M Opening direction

Claims (5)

A sheet main body that can surround an item to be packaged and has an opening start area set at a predetermined location;
a plurality of cut tapes provided on the sheet body and extending in the opening direction from at least the opening start area;
a notch formed in the opening initiation region;
An unsealing piece formed on the side of the notch in the unsealing direction in the unsealing start region by forming the notch;
A packaging material comprising: a protective sheet disposed on the sheet body to cover the notch,
Each of the plurality of cut tapes has straight cutability along the opening direction,
The plurality of cut tapes include at least a first cut tape disposed closest to one end in an unsealing crossing direction orthogonal to the unsealing direction, and a second cut tape disposed closest to the other end. ,
the notch is arranged from the first cut tape to the second cut tape,
one end of the notch is located within the width of the first cut tape,
The other end of the notch is arranged within the width of the second cut tape. According to claim 1, the pair of band-shaped sheet portions extending in the unsealing direction are arranged on the outside of the first cut tape and the second cut tape in the unsealing cross direction of the sheet main body. packaging material. A packaging bag, wherein the sheet main body of the packaging material according to claim 1 or 2 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 3, wherein the sheet body is folded to form the bag body into a three-dimensional shape. A packaging material roll comprising a packaging material roll in which the packaging material according to claim 2 is integrated so as to be continuous in the extending direction of the belt-shaped sheet portion.

Images