JP7339081B2 - packaging material - Google Patents

Description

TECHNICAL FIELD The present invention relates to a packaging material comprising a tubular film bonded to a base material.

A packaging body in which an article to be packaged as a product is packaged properly protects the article to be packaged, and at the same time, importance is attached to its appearance at a store or the like. Patent Literature 1 discloses an example of a packaging material used for a conventional package. The packaging material disclosed in the document includes a tubular film that covers an object to be packaged, and a base material to which the tubular film is joined. As the base material, for example, a mount made of cardboard is used, and the cylindrical film is a heat-shrinkable film and is generally transparent. The base material and the tubular film are joined, for example, with an adhesive or the like. As shown in FIG. 3 of the document, the tubular film has two flat surface portions facing each other and two curved surface portions facing each other. By folding each curved surface portion into a doglegged shape when viewed in the axial direction, the tubular film is flattened along the base material.

JP 2017-30764 A

When inserting an object to be packaged into the tubular film when manufacturing a package using the packaging material, the folded tubular film is unfolded. Since the tubular film is provided with the above-described bent surface portion, the expanded tubular film is likely to have a so-called hourglass shape in which the central portion is constricted when viewed in the axial direction. In order to avoid interference of the package with the constricted portion, it is necessary to prepare a cylindrical film having a sufficiently long circumference. However, when a tubular film having a long circumference is thermally shrunk, there are concerns about problems such as formation of excessively hard portions and wrinkles.

SUMMARY OF THE INVENTION The present invention has been conceived under the circumstances described above, and provides a packaging material in which an object to be packaged can be more easily inserted while avoiding excessive increase in the peripheral length of the tubular film. The task is to

A packaging material provided by the present invention is a packaging material comprising a base material, a tubular film, and a joining portion for joining the base material and the tubular film, wherein the tubular film comprises a first It has a quadrilateral shape when viewed in the axial direction, and has a surface portion, a second surface portion, a third surface portion, and a fourth surface portion. and the third surface portion, a third folding portion is provided between the third surface portion and the fourth surface portion, and between the fourth surface portion and the first surface portion is provided with a fourth folded portion, the internal angle of each of the first folded portion and the third folded portion is greater than the internal angle of each of the second folded portion and the fourth folded portion, and the first surface portion is It is characterized by being joined to the base material by the joining portion.

In preferable embodiment of this invention, the said 2nd folding part protrudes from the said base material in planar view.

In a preferred embodiment of the present invention, the first surface portion includes fixing portions to which both ends of the film material forming the tubular film are fixed.

In a preferred embodiment of the present invention, at least part of a portion of the first surface portion and the fourth surface portion that overlaps the joint portion in a plan view is transparent.

According to the present invention, the unfolded tubular film is less likely to have creases that protrude inward, and a larger opening area of the tubular film can be ensured. Therefore, the object to be packaged can be inserted more easily while avoiding the peripheral length of the tubular film from becoming excessively large.

Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the packaging material based on 1st Embodiment of this invention. 1 is a plan view showing a packaging material according to a first embodiment of the present invention; FIG. 3 is a cross-sectional view taken along line III-III of FIG. 2; FIG. FIG. 2 is a perspective view showing a state in which a tubular film is unfolded in the packaging material according to the first embodiment of the present invention; FIG. 4 is a plan view showing a step of inserting an object to be packaged into the tubular film of the packaging material according to the first embodiment of the present invention; FIG. 2 is a cross-sectional view showing a state in which an object to be packaged is inserted into the tubular film of the packaging material according to the first embodiment of the present invention; BRIEF DESCRIPTION OF THE DRAWINGS It is a top view which shows the package using the packaging material which concerns on 1st Embodiment of this invention. FIG. 8 is a cross-sectional view along line VIII-VIII of FIG. 7; FIG. 4 is a plan view showing a first modified example of the packaging material according to the first embodiment of the present invention; FIG. 5 is a plan view showing a second modification of the packaging material according to the first embodiment of the present invention; FIG. 4 is a cross-sectional view showing a packaging material according to a second embodiment of the present invention; FIG. 11 is a plan view showing a packaging material according to a third embodiment of the present invention; FIG. 13 is a cross-sectional view along line XIII-XIII of FIG. 12; FIG. 11 is a cross-sectional view showing a package using a packaging material according to a third embodiment of the present invention; FIG. 11 is a cross-sectional view showing a first modified example of the packaging material according to the third embodiment of the present invention;

Preferred embodiments of the present invention will be specifically described below with reference to the drawings.

The terms "first," "second," "third," etc. in this disclosure are used for identification purposes only and are not necessarily intended to impose a permutation of the objects.

<First Embodiment>
1 to 6 show a packaging material according to a first embodiment of the invention. A packaging material A1 of this embodiment includes a base material 1, a tubular film 2, and a joint portion 3. As shown in FIG.

FIG. 1 is a perspective view showing the packaging material A1. FIG. 2 is a plan view showing the packaging material A1. 3 is a cross-sectional view taken along line III-III in FIG. 2. FIG. FIG. 4 is a perspective view showing a state in which the tubular film is unfolded in the packaging material A1. FIG. 5 is a plan view showing a process of inserting an object to be packaged into the tubular film of the packaging material A1. FIG. 6 is a cross-sectional view showing a state in which an object to be packaged is inserted into the tubular film of the packaging material A1.

The base material 1 holds an article to be packaged 4, which will be described later, via the tubular film 2 and the joint portion 3. As shown in FIG. As the base material 1, a general base material such as a so-called non-coated paper such as thick paper, plain paper, synthetic paper, or a so-called coated paper having a resin layer on the surface. A base material mainly made of a synthetic resin material such as a resin sheet can be adopted. Various sheet materials such as a single-layer sheet and a laminated sheet obtained by laminating and bonding two or more of these sheets can be used. In the present embodiment, the base material 1 is made of cardboard, and as shown in FIG. 2, a substantially rectangular mount is used as an example, but the shape of the base material 1 is not limited at all. In the illustrated example, the base 1 has a pair of side edges 11 . The pair of side edges 11 are sides positioned at both ends in the x direction, and each extends in the y direction.

The tubular film 2 is a shrinkable film called a so-called shrink film, and is a member for tightly wrapping an object 4 to be packaged, which will be described later, by thermal shrinkage, for example. The size and aspect ratio of the tubular film 2 are not particularly limited. The tubular film 2 includes a first surface portion 21, a second surface portion 22, a third surface portion 23, a fourth surface portion 24, a first folded portion 25, a second folded portion 26, a third folded portion 27, a fourth folded portion 28, It has a pair of openings 201 , a planned cutting line 202 and a fixing portion 203 . The cylindrical film 2 has the y direction as its axial direction, and has a flat quadrilateral shape when viewed in the z direction, as shown in FIG.

The first surface portion 21 is a portion facing the base material 1 . The third surface portion 23 is located on the opposite side of the base material 1 in the y direction with respect to the first surface portion 21 . Also, the third surface portion 23 is displaced from the first surface portion 21 in the x direction. The third surface portion 23 is substantially parallel to the first surface portion 21 . The second surface portion 22 and the fourth surface portion 24 are connected to the first surface portion 21 and the third surface portion 23, respectively.

The first folded portion 25, the second folded portion 26, the third folded portion 27 and the fourth folded portion 28 are portions where predetermined portions of the tubular film 2 are folded. The first folded portion 25 is provided between the first surface portion 21 and the second surface portion 22 . The second folded portion 26 is provided between the second surface portion 22 and the third surface portion 23 . The third folded portion 27 is provided between the third surface portion 23 and the fourth surface portion 24 . The fourth folded portion 28 is provided between the fourth surface portion 24 and the first surface portion 21 .

As shown in FIG. 3, the internal angles of the first folded portion 25 and the third folded portion 27 when viewed in the z direction are larger than the internal angles of the second folded portion 26 and the fourth folded portion 28 when viewed in the z direction. . The interior angle of the first folded portion 25 and the interior angle of the third folded portion 27 are approximately the same, and the interior angle of the second folded portion 26 and the interior angle of the fourth folded portion 28 are approximately the same. In the illustrated example, the internal angles of the first folded portion 25 and the third folded portion 27 are, for example, about 165° to 175°, and the internal angles of the second folded portion 26 and the fourth folded portion 28 are, for example, 5° to 15°. °, but not limited to. Thus, the tubular film 2 in the packaging material A1 is flatly folded along the x-direction and the y-direction. Such a form is suitable for stacking and storing or transporting a plurality of packaging materials A1. Further, in the present embodiment, the x-direction dimension (the distance between the second folded portion 26 and the fourth folded portion 28 ) of the flatly folded tubular film 2 is larger than the x-direction dimension of the base material 1 .

A pair of openings 201 are openings at both ends in the z-direction, which is the axial direction of the tubular film 2 . The tubular film 2 is not limited to having a pair of openings 201 on both sides in the z direction, and may have an opening 201 on only one side in the z direction and the other side may be closed. good.

The planned cutting line 202 is for easier cutting for opening the tubular film 2 in the package using the packaging material A1. The planned cutting line 202 is, for example, a perforation line. The number and positions of the intended cutting lines 202 are not limited at all, and in the illustrated example, two intended cutting lines 202 are provided on both sides in the x direction with the third folded portion 27 interposed therebetween.

The fixed part 203 is a part where both ends of the film material for forming the tubular film 2 are fixed to each other. By providing the fixing portion 203, the tubular film 2 having a tubular shape is formed from the film material described above. A method of forming the fixing portion 203 is not particularly limited, and various conventionally known methods such as a method using an adhesive and a method using welding can be used. In the illustrated example, the fixing portion 203 is provided on the first surface portion 21 and formed over the entire length of the first surface portion 21 in the y direction.

Specific examples of the resin film constituting the tubular film 2 include linear low-density polyethylene (LLDPE), low-density polyethylene (LDPE), high-density polyethylene (HDPE), polyolefins such as polypropylene (PP), and polyethylene terephthalate. (PET), polyesters such as polybutylene terephthalate (PBT), polystyrenes (PS), and polylactic acid (PLA), polyamides, and ethylene-vinyl acetate copolymers (EVA), ethylene-acrylic acid copolymers (EAA), films made of vinyl resins such as polyvinyl chloride. Also, a film containing a resin mixture in which two or more of these resins are mixed can be used, and a laminated film in which two or more kinds of films are laminated can also be used. In particular, as the heat-shrinkable shrink film, polyester-based, polyolefin-based and polystyrene-based films are preferred, and polyester-based and polystyrene-based films are particularly preferred, since they have appropriate shrinkage stress and high transparency. A uniaxially stretched film that shrinks mainly in the circumferential direction can be preferably used, but a biaxially stretched film that shrinks in the axial direction may also be used. The uniaxially stretched film refers to a film which is substantially uniaxially stretched, and means a film having a significantly different shrinkage rate between the circumferential direction (so-called TD direction) and the axial direction (so-called MD direction). However, it does not mean only a film that does not shrink at all in any direction (so-called shrinkage rate is zero). Specifically, for example, a film having a circumferential heat shrinkage of 35 to 80% and an axial heat shrinkage of −5 to 10% at 90° C. for 10 seconds (hot water treatment) can be used.

The thickness of the tubular film 2 is not particularly limited, but preferably 8 to 100 μm, more preferably 10 to 80 μm, particularly preferably 15 to 60 μm. As the tubular film 2, a colored resin tubular film or a resin film having a printed layer for displaying a product name, design, etc. can be used.

In this embodiment, the tubular film 2 is a heat-shrinkable uniaxially stretched film. The main stretching direction of the tubular film 2 is along the x direction. Such a tubular film 2 has the property that when heated, the heat shrinkage along the x-direction is significantly greater than the heat shrinkage along the other directions.

The joint portion 3 has a high adhesive strength with, for example, the base material 1 and the tubular film 2, and can withstand the load of the packaged item 4, which will be described later. It can be configured by an agent (including an adhesive). Examples of such adhesives include elastomer adhesives, thermoplastic resin adhesives, pressure-sensitive adhesives such as hot-melt adhesives, and heat-sensitive adhesives. A hot-melt adhesive that develops strong adhesive strength when cooled to room temperature after laminating the film 2 to the base material 1 is preferable, and a moisture-reactive hot-melt adhesive is more preferable. The adhesive strength can be adjusted not only by the type of adhesive, but also by the application area of the adhesive, various additives, and the like, and can be appropriately adjusted according to the weight of the object to be supported. Also, the joint portion 3 may be configured with a so-called double-sided tape instead of the adhesive. A specific configuration such as the shape of the joint portion 3 is not particularly limited. In the illustrated example, the joint portion 3 is formed in a strip shape along the y direction.

The joining portion 3 joins the first surface portion 21 of the tubular film 2 to the base material 1 . In the illustrated example, the joint portion 3 joins the fixing portion 203 provided on the first surface portion 21 of the tubular film 2 to the base material 1, but is not limited to this, and the first surface portion 21 portion other than the fixing portion 203 may be joined. As shown in FIGS. 2 and 3, in the illustrated example, the x-direction center of the base material 1 overlaps the first surface portion 21 in the z-direction view. More specifically, the x-direction of the base material 1 The center substantially overlaps the x-direction center of the first surface portion 21 of the tubular film 2 . Moreover, in the illustrated example, the tubular film 2 protrudes from the base material 1 when viewed in the z direction. More specifically, the second folded portion 26 of the tubular film 2 is located outside the one side edge 11 of the tubular film 2 (the right side edge 11 in FIG. 2) in the x direction (see FIG. 2). middle right).

4 to 6 show the process of inserting the object 4 to be packaged into the packaging material A1 in manufacturing the package using the packaging material A1. The object to be packaged 4 is wrapped by the tubular film 2 , and is held against the base material 1 in the package B<b>1 to be described later, and is protected by the tubular film 2 . Various products sold at stores may be used as the object to be packaged 4 as long as it can be wrapped by the tubular film 2 . In the illustrated example, the package 4 is an article elongated in the y-direction, and an example thereof is a toothbrush.

As shown in FIG. 4, the tubular film 2 is unfolded in order to insert the package 4 into the tubular film 2. As shown in FIG. In the packaging material A1, the tubular film 2 is folded into a flat quadrilateral shape when viewed in the y direction. Regarding this tubular film 2, the third surface portion 23 is separated from the first surface portion 21 in the z direction, and the second surface portion 22 and the fourth surface portion 24 are erected along the z direction. As a result, as shown in FIG. 6, the tubular film 2 is expanded into a rectangular shape when viewed in the y direction. As one method for performing this expansion, for example, the part of the tubular film 2 that protrudes from the base material 1 in the x direction (the part where the second folding part 26 is provided) is pushed by the operator's hand or by the manufacturing device. There is a method of gripping or locking with a jig or the like.

Next, as shown in FIGS. 5 and 6, the article to be packaged 4 is inserted into the tubular film 2 through one opening 201 of the tubular film 2 . Then, for example, by heating the tubular film 2 to a predetermined temperature, the tubular film 2 is thermally shrunk. Due to this heat shrinkage, the tubular film 2 shrinks significantly in the x-direction and z-direction, and tightly covers the object 4 to be packaged. As a result, the package B1 shown in FIGS. 7 and 8 is obtained. In the package B1, the first folded portion 25, the second folded portion 26, the third folded portion 27 and the fourth folded portion 28 are hardly present. A planned cutting line 202 remains on a part of the tubular film 2 . When the object 4 to be packaged is to be taken out of the package B1, the tubular film 2 may be opened by cutting the tubular film 2 along the planned cutting line 202 . In this embodiment, as shown in FIG. 8, two planned cutting lines 202 are provided across the portion that was the third folding portion 27 . As shown in the figure, when the item to be packaged 4 has a substantially prismatic shape, the two planned cutting lines 202 are positioned near the corners of the item to be packaged 4 . As a result, there is an advantage that it is easy to cut along the planned cutting line 202 by pinching a part of the tubular film 2 or the like. In addition, one planned cutting line 202 is positioned on the front side of the package B1 (on the side opposite to the base material 1 in the z direction). Therefore, it is possible to prevent the hand from being injured due to contact with the backing paper or the like when cutting along the planned cutting line 202 .

Moreover, the method for forming the tubular film 2 is not limited at all, and an example of the method for forming the tubular film 2 will be described below. A fixed portion 203 is provided on the raw film material to form, for example, a cylindrical tubular film 2 . Next, by folding the tubular film 2 flat, the first folded portion 25 and the third folded portion 27 are formed. Next, the first folding portion 25 and the third folding portion 27 are opened, and the tubular film 2 is folded back so that the portion between these portions of the tubular film 2 is a mountain fold. Thereby, the second folded portion 26 and the fourth folded portion 28 are formed. In the tubular film 2 after this folding is completed, the internal angles of the first folded portion 25 and the third folded portion 27 are larger than the internal angles of the second folded portion 26 and the fourth folded portion 28 . Since the first folded portion 25 and the third folded portion 27 are formed by once folding the tubular film 2, the tubular film 2 is unfolded as shown in FIGS. In this case, the tubular film 2 can be easily folded along the first folding portion 25 and the third folding portion 27, and the tubular film 2 can be unfolded more easily.

Next, the action of the packaging material A1 will be described.

According to this embodiment, when the flat tubular film 2 in the packaging material A1 shown in FIGS. 1 and 3 is expanded as shown in FIGS. When viewed from the direction), it has a substantially rectangular shape. Unlike the present embodiment, if the tubular film 2 has a pair of flat surface portions and a pair of bent surface portions that are folded into a dogleg shape, the second surface portion in FIG. In the portions corresponding to 22 and the fourth surface portion 24, an inwardly protruding dogleg-shaped crease remains. This crease may interfere with the object to be packaged 4 when the object to be packaged 4 is inserted into the tubular film 2 . In order to avoid this interference, if the circumference of the tubular film 2 (the sum of the dimensions in the x-direction and the y-direction) is lengthened, the circumference of the tubular film 2 becomes excessively long with respect to the circumference of the item to be packaged 4. Sometimes. As a result, the tubular film 2 will shrink excessively, and there is concern that a portion of the tubular film 2 may become extremely stiff or wrinkled. According to the present embodiment, the unfolded tubular film 2 is less likely to have creases that protrude inward, and a larger opening area of the tubular film 2 can be ensured. Therefore, it is possible to more easily insert the object to be packaged 4 while avoiding the circumferential length of the tubular film 2 from becoming excessively large.

Moreover, in this embodiment, a part of the tubular film 2 (the second folded portion 26 and the like) protrudes from the base material 1 in the x direction. As a result, by gripping or locking the portion of the tubular film 2 that includes the second folded portion 26, the flat folded tubular film 2 can be expanded more easily and reliably. is. This is preferable, for example, for improving the manufacturing efficiency when manufacturing the package B1 using the packaging material A1.

9-15 show variations and other embodiments of the invention. In these figures, the same or similar elements as in the above embodiment are denoted by the same reference numerals as in the above embodiment.

<First embodiment, first modification>
FIG. 9 is a plan view showing a first modification of the packaging material A1. In the packaging material A11 of this modified example, the shape of the joint 3 is different from that of the packaging material A1. The joint portion 3 of this example has a shape that is long in the y direction and has a meandering shape that has an amplitude in the x direction. As understood from this modified example, the specific shape of the joint 3 is not limited at all. The joint portion 3 may have any shape as long as it can hold the object to be packaged 4 on the base material 1 via the tubular film 2 .

<First Embodiment, Second Modification>
FIG. 10 is a plan view showing a second modification of the packaging material A1. In the packaging material A<b>12 of this modified example, the joint portion 3 is configured to have a plurality of small piece portions 31 . The plurality of small pieces 31 are spaced apart from each other in the y direction. As can be understood from this modified example, the joint portion 3 may be composed of one portion as a whole, or may be composed of a plurality of small pieces 31 . Also, the plurality of small pieces 31 may have different shapes from each other, for example.

<Second embodiment>
FIG. 11 is a cross-sectional view showing a packaging material according to a second embodiment of the invention. In the packaging material A2 of the present embodiment, the center of the first surface portion 21 in the x direction (the center of the joint portion 3 in the x direction) and the center of the base material 1 in the x direction are far apart. The base material 1 has a configuration in which the right side portion in the x-direction view is larger than the left side portion with respect to the joint portion 3 . Moreover, the tubular film 2 is included in the base material 1 without protruding from the base material 1 when viewed in the z direction. The position of the joint part 3 and the 1st surface part 21 with respect to the base material 1 is not limited at all so that it may be understood from this modification. Moreover, the configuration in which the entire tubular film 2 overlaps the base material 1 is preferable for suppressing damage to the tubular film 2 during storage and transportation of the packaging material A2.

<Third Embodiment>
12 and 13 show a packaging material according to a third embodiment of the invention. The packaging material A3 of this embodiment differs from the embodiment described above in the configuration of the tubular film 2 . FIG. 12 is a plan view showing the packaging material A3. 13 is a cross-sectional view taken along line XIII-XIII of FIG. 12. FIG.

In this embodiment, the printing portion 210 is provided on the tubular film 2 . The printed portion 210 is a portion printed on the surface of the tubular film 2 or the like. The contents to be printed on the printing unit 210 are not limited at all, and include, for example, the product name and logo of the package 4, explanations regarding usage, pop advertisements for attracting customers, and the like. In FIG. 13, in order to make it easier to understand the area in which the printing section 210 is provided, the printing section 210 is schematically shown as having a certain thickness, but the actual thickness of the printing section 210 is It has a thickness corresponding to a conventionally known printed layer or the like. It should be noted that the printing section 210 in this embodiment is defined as having a light-shielding property to such an extent that it is inappropriate to visually confirm the state of the joint section 3 through the printing section 210, for example.

In the illustrated example, printing section 210 includes front section 211 , side section 212 and side section 213 . The front portion 211 is a portion provided on the third surface portion 23 . The side portion 212 is a portion provided on the fourth surface portion 24 . The side portion 213 is a portion provided on the second surface portion 22 .

When the tubular film 2 of the packaging material A3 is flatly folded as shown, the first surface portion 21 and the fourth surface portion 24 overlap the joint portion 3 when viewed in the z direction. The printing section 210 is not provided on the first surface section 21 . Further, the side portion 212 provided on the fourth surface portion 24 is provided at a position that does not overlap the joint portion 3 when viewed in the z direction. Specifically, in the illustrated example, the two side portions 212 are separately arranged on both sides of the joint portion 3 in the x direction. When the tubular film 2 is made of a transparent material, the portions of the tubular film 2 overlapping the joining portion 3 when viewed in the z direction (parts of the first surface portion 21 and part of the fourth surface portion 24 each) are transparent. A part of the printing portion 210 may be provided in a portion of the first surface portion 21 that does not overlap the joint portion 3 . Moreover, even if a portion of the printing portion 210 overlaps the joint portion 3, at least a portion of the portion overlapping the joint portion 3 in the first surface portion 21 and the fourth surface portion 24 may be transparent. In addition, in a portion of the tubular film 2 where the printed portion 210 is not provided, for example, a printed portion having transparency to the extent that the state of the joint portion 3 can be appropriately visually confirmed may be provided. Examples of such a printed portion include those intended to improve slipperiness and protect the printed portion 210 .

The size and position of front portion 211 and side portion 213 are not limited at all. The front portion 211 and the side portions 213 may be provided on substantially the entire surfaces of the third surface portion 23 and the second surface portion 22 . Alternatively, the printing unit 210 may be configured without the front portion 211 and the side portions 213 .

According to this embodiment as well, it is possible to more easily insert the object to be packaged 4 while avoiding excessive increase in the peripheral length of the tubular film 2 . Further, as shown in FIG. 14, in the package B3 using the packaging material A3, the front surface portion 211 provided on the third surface portion 23 of the packaging material A3 is positioned in front of the object 4 in the z direction. . This position is a position that easily draws the attention of consumers when the package B3 is displayed in a shop. Although the front portion 211 is provided at this position, in the packaging material A3, the front portion 211 does not overlap the joint portion 3 when viewed in the z direction. Therefore, in the packaging material A3, it is possible to prevent the front portion 211 from covering the joint portion 3 when visually confirming the joint state of the joint portion 3, for example. In addition, by providing the side portion 212 at a position avoiding the joint portion 3, it is possible to make the portion of the tubular film 2 that overlaps the joint portion 3 in the z direction transparent. It is preferable for checking the bonding state of

<Third embodiment, first modification>
FIG. 15 shows a first modification of the packaging material A3. The packaging material A31 of this modification differs from the packaging material A3 in the position where the planned cutting line 202 is provided. A planned cutting line 202 is provided on the first surface portion 21 of the packaging material A31. In the illustrated example, two planned cutting lines 202 are provided on both sides in the x direction with the joint portion 3 (fixed portion 203) interposed therebetween.

According to this modified example as well, it is possible to more easily insert the object to be packaged 4 while avoiding excessive increase in the peripheral length of the tubular film 2 . Further, as understood from this modified example, the position where the planned cutting line 202 is provided is not limited at all.

The packaging material according to the present invention is not limited to the embodiments described above. The specific configuration of each part of the packaging material according to the present invention can be changed in various ways.

A1, A11, A12, A13, A2, A3, A31: Packaging material B1, B3: Package 1: Base material 2: Cylindrical film 3: Joint part 4: Packaged object 11: Side edge 21: First surface part 22 : Second surface portion 23 : Third surface portion 24 : Fourth surface portion 25 : First folding portion 26 : Second folding portion 27 : Third folding portion 28 : Fourth folding portion 31 : Small piece portion 201 : Opening portion 202 : Cutting Estimated line 203: Fixed portion 210: Printing portion 211: Front portions 212, 213: Side portions

Claims (4)

a base material;
A packaging material comprising: a tubular film; and a joining portion that joins the base material and the tubular film,
The tubular film has a quadrilateral shape when viewed in the axial direction, having a first surface, a second surface, a third surface and a fourth surface,
A first folding portion is provided between the first surface portion and the second surface portion,
A second folding portion is provided between the second surface portion and the third surface portion,
A third folding portion is provided between the third surface portion and the fourth surface portion,
A fourth folding portion is provided between the fourth surface portion and the first surface portion,
In the state where the tubular film is folded into a flat quadrilateral shape, the interior angles of the first and third folds are larger than the interior angles of the second and fourth folds. big,
A packaging material, wherein the first surface portion is joined to the base material by the joining portion. The packaging material according to claim 1, wherein the second folded portion protrudes from the base material in plan view. The tubular film is formed into a tubular shape by providing fixing portions in which both ends of the film material are fixed to each other,
The packaging material according to claim 1 or 2, wherein the first surface portion includes the fixing portion. 4. The packaging material according to any one of claims 1 to 3, wherein at least part of a portion of said first surface portion and said fourth surface portion overlapping said joint portion in a plan view is transparent.

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