Food packaging materials, raw materials for food packaging materials, and food packaging bodies

Abstract

To provide a food packaging material which can be removed easily from food, and which can separate a fixing sheet from an outer sheet smoothly.SOLUTION: A food packaging material includes: an outer sheet which can separate a third portion formed between a first portion and a second portion from the first portion and the second portion; and a fixing sheet overlapping with the outer sheet and fixed to the outer sheet so as to be peeled. The fixing sheet includes a fixing part which is fixed to the third portion in the outer sheet so as to be peeled.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a food packaging material, a raw web of food packaging material, and a food package.

Background Art

[0002] In recent years, food packaging materials are required to be easily openable without directly touching the food, and to allow the food to be eaten hygienically. As such a food packaging material, one that takes out the food by pulling a cut tape to split the food packaging material into two parts is known.

[0003] Specifically, Patent Document 1 proposes, as such a food packaging material, a food packaging material having an outer sheet and an adhesive sheet (hand dirt prevention sheet) that is releasably fixed to the inner side of the outer sheet. In this food packaging material, when the outer sheet split into two parts at the time of opening is removed from the food, the adhesive sheet peels off from the outer sheet, so that the adhesive sheet is held on the food side. This allows the food to be held via the adhesive sheet, so that the food can be eaten hygienically.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of Invention

Problems to be Solved by the Invention

[0005] However, in the food packaging material as described above, when the outer sheet is divided into two parts and then removed from the food, a force is required to peel the adhesive sheet off the outer sheet. For this reason, excessive force is applied to the food when removing the outer sheet from the food, which may cause the food to collapse or scatter.

[0006] Therefore, the object of the present invention is to provide a food packaging material that can be easily removed from food and allows for smooth separation of the adhesive sheet from the outer sheet. Another object of the present invention is to provide a raw material for food packaging used in the manufacture of the food packaging material, and a food package in which food is packaged with the food packaging material. [Means for solving the problem]

[0007] The food packaging material according to the present invention comprises an outer sheet in which a third portion formed between a first portion and a second portion is separable from the first portion and the second portion, and an adhesive sheet that overlaps with the outer sheet and is peelably fixed to the outer sheet, the adhesive sheet having an adhesive portion that is peelably fixed to the third portion of the outer sheet.

[0008] With this configuration, the food can be removed from between the first and second parts by separating the third part from the first and second parts while the food is still packaged in food packaging material, thus allowing the food packaging material to be easily removed from the food. Furthermore, when the third part is separated from the first and second parts while the food is packaged in the food packaging material, the adhesive portion of the adhesive sheet detaches from the third part. Therefore, when removing the food packaging material from the food, it is not necessary to detach the adhesive portion of the adhesive sheet from the outer sheet. As a result, the adhesive sheet can be smoothly separated from the outer sheet. Also, once the food packaging material is removed from the food, the adhesive sheet and the food become one, allowing the food to be consumed hygienically without directly touching it with one's hands.

[0009] The third part is a band-shaped region extending in one direction on the outer sheet, and it is preferable that the adhesive sheet has at least one adhesive portion, and that the region other than the adhesive portion is not adhered to the outer sheet.

[0010] With this configuration, since the adhesive sheet has at least one adhesive portion, and the area other than the adhesive portion is not adhered to the outer sheet, the adhesive portion can be peeled off from the third portion with less resistance than when the entire adhesive sheet is adhered to the outer sheet (in other words, when the entire adhesive sheet is an adhesive portion).

[0011] The outer sheet comprises at least one opening strip extending in one direction, which overlaps at least a portion with the third portion, and the opening strip overlaps at least a portion with the fixing sheet, and the fixing portion of the fixing sheet may be fixed to the outer sheet at a position overlapping with the opening strip.

[0012] With this configuration, the adhesive portion of the adhesive sheet is fixed to the outer sheet at a position overlapping with the opening strip, so that when the outer sheet is cut along the opening strip to separate the third portion, the adhesive portion can be reliably peeled off from the third portion.

[0013] The food packaging material according to the present invention comprises at least two opening strips, and the fixing portion of the fixing sheet may be fixed to the outer sheet between two adjacent opening strips.

[0014] With this configuration, the adhesive portion of the adhesive sheet is fixed to the outer sheet between two adjacent opening strips, so that when the outer sheet is cut along the opening strips to separate the third portion, the adhesive portion can be reliably peeled off from the third portion.

[0015] The raw material for food packaging according to the present invention is formed by continuously forming multiple of the above-mentioned food packaging materials.

[0016] The food packaging according to the present invention comprises any of the above-mentioned food packaging materials and food packaged in the food packaging material, wherein the food overlaps with at least a portion of the adhesive sheet. [Effects of the Invention]

[0017] As described above, according to the present invention, it is possible to provide a food packaging material that can be easily removed from food and allows the adhesive sheet to be smoothly separated from the outer sheet. It is also possible to provide a raw web of food packaging material used for manufacturing the food packaging material, and a food package in which food is packaged with the food packaging material. Brief Description of the Drawings

[0018] [Figure 1] Figure 1 is an exploded perspective view of the food packaging material according to the first embodiment of the present invention. [Figure 2] Figure 2 is a plan view of the same food packaging material as viewed from the outer sheet side. [Figure 3] Figures 3(a) to (c) are explanatory views of the process of packaging food using the same food packaging material. [Figure 4] Figures 4(a) to (c) are explanatory views of the process of opening the food package in which food is packaged with the same food packaging material and taking out the food. [Figure 5] Figure 5 is an exploded perspective view of the food packaging material according to the second embodiment of the present invention. [Figure 6] Figure 6 is a plan view of the same food packaging material as viewed from the outer sheet side. [Figure 7] Figures 7(a) to (c) are explanatory views of the process of opening the food package in which food is packaged with the same food packaging material and taking out the food. [Figure 8] Figure 8 is an exploded perspective view of the food packaging material according to the third embodiment of the present invention. [Figure 9] Figure 9 is a plan view of the same food packaging material as viewed from the outer sheet side. [Figure 10] Figures 10(a) to (b) are explanatory views of the process of packaging food using the same food packaging material. [Figure 11] Figures 11(a) to (b) are explanatory views of the process of opening the food package in which food is packaged with the same food packaging material and taking out the food. Modes for Carrying Out the Invention

[0019] Embodiments of the food packaging material according to the present invention will be described below with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and their descriptions will not be repeated. In the following description, "one direction" refers to the direction along the x-axis in the coordinate axes of each figure, and "the other direction intersecting the one direction" refers to the direction along the y-axis in the coordinate axes of each figure.

[0020] <First Embodiment> A food packaging material 1 according to the first embodiment will be described with reference to Figures 1 to 4. As shown in Figure 1, the food packaging material 1 according to the first embodiment is used to package food A. Food A is not particularly limited, and in this embodiment, it comprises a processed rice food A1 and a sheet-like food A2 attached to the processed rice food A1. The processed rice food A1 is not particularly limited, and examples include rice balls, sushi, etc. The shape of the processed rice food A1 is not particularly limited, and examples include triangular, square, spherical, cylindrical, circular, elliptical, etc. In this embodiment, a triangular processed rice food A1 will be described as an example. The sheet-like food A2 is not particularly limited, and examples include kelp, dried sardines, etc. The shape of the sheet-like food A2 is not particularly limited, and examples include triangular, square, circular, etc.

[0021] The food packaging material 1 comprises an outer sheet 2 in which a third portion 2C formed between a first portion 2A and a second portion 2B is separable from the first portion 2A and the second portion 2B, and an adhesive sheet 3 that overlaps the outer sheet 2 and is peelably fixed to the outer sheet 2. The outer sheet 2 also comprises an outer sheet body 2d sized to enclose food A, and at least one (specifically, two) opening strips 4 attached to the outer sheet body 2d. The food packaging material 1 also comprises an inner sheet 6 that overlaps the outer sheet 2. The adhesive sheet 3 is positioned between the outer sheet 2 and the inner sheet 6, and the sheet-like food A2 is positioned between the adhesive sheet 3 and the inner sheet 6.

[0022] The materials for the outer sheet 2, the adhesive sheet 3, and the inner sheet 6 are not particularly limited and include, for example, synthetic resin films such as polyethylene and polypropylene, composite material films of these synthetic resins and fibers, paper, and composite sheets of paper and synthetic resin. Examples of synthetic resin films include uniaxially oriented synthetic resin films, biaxially oriented synthetic resin films, and unoriented synthetic resin films. The materials for the outer sheet 2, the adhesive sheet 3, and the inner sheet 6 may be the same or different. At least one of the outer sheet 2, the adhesive sheet 3, and the inner sheet 6 may be transparent, opaque, or semi-transparent. Furthermore, since the adhesive sheet 3 comes into direct contact with food A (in this embodiment, sheet-shaped food A2), it is preferable to use a material that does not easily adhere to food A (in this embodiment, sheet-shaped food A2).

[0023] The outer sheet 2 is sized to enclose food A. In this embodiment, the outer sheet 2 is formed in a rectangular shape, specifically a rectangle, with one direction (hereinafter also referred to as the first direction) being the longitudinal direction and the other direction intersecting the first direction (hereinafter also referred to as the second direction) being the width direction. The outer sheet 2 also has two notches 2a, 2a at one end in the first direction. The two notches 2a, 2a are formed in a linear shape extending in the first direction, and one end of each is in contact with the edge of the outer sheet 2. As a result, the area between the two notches 2a, 2a on the outer sheet 2 is separated from the other area to form a gripping portion 2b.

[0024] As described above, the outer sheet 2 can be divided in a second direction. Specifically, by pulling the gripping portion 2b from one end to the other end of the outer sheet 2 in the first direction, it becomes possible to cut the outer sheet 2 in the first direction, starting from the other ends of the two notches 2a, 2a. When the outer sheet 2 is cut, the strip-shaped region between the two planned cutting lines CL, starting from the other ends of the two notches 2a, 2a, is separated from the other region. This divides the outer sheet 2 in a second direction. In other words, in this embodiment, the outer sheet 2 has a first portion 2A on one side in the second direction, a second portion 2B on the other side in the second direction, and a third portion (specifically, a strip-shaped region extending in the first direction) 2C between the first portion 2A and the second portion 2B in the second direction. By cutting the outer sheet 2 and separating and removing the third portion 2C from the first portion 2A and the second portion 2B, the outer sheet 2 can be divided into the first portion 2A and the second portion 2B.

[0025] The two opening strips 4,4 (for example, cut tape or thread) are attached to one surface of the outer sheet 2 such that the first direction is the length direction. The two opening strips 4,4 are attached along the entire length of the outer sheet 2 in the first direction. One end of the two opening strips 4,4 in the first direction is located between the two notches 2a,2a (i.e., overlapping with the tab 2b). The two opening strips 4,4 also overlap at least a portion of the third part 2C of the outer sheet 2 (specifically, overlapping along the entire length of the strip-shaped third part 2C). The two opening strips 4,4 are located approximately in the center of the outer sheet 2 in the second direction. The two opening strips 4,4 also overlap with the overlapping portion 6b formed by the overlapping ends of the inner sheet pieces 6a,6a, which will be described later.

[0026] Furthermore, each of the two opening strips 4,4 is arranged in a wave-like shape that curves in the second direction. Specifically, each of the two opening strips 4,4 is arranged along the entire length of the outer sheet 2 in a meandering manner with respect to the first direction (in this embodiment, the center line extending in the first direction of the outer sheet 2). By arranging the two opening strips 4,4 symmetrically with respect to the first direction (in this embodiment, the center line extending in the first direction of the outer sheet 2), two intersection points 4a are formed where the two opening strips 4,4 intersect.

[0027] Furthermore, the distance between the two opening strips 4,4 becomes wider than the distance between the two notches 2a,2a (i.e., the tab 2b) as it moves away from the two notches 2a,2a (i.e., the tab 2b) in the first direction, between the intersection points 4a,4a. The distance between the two opening strips 4,4 is widest approximately in the center between the intersection points 4a,4a in the first direction. Also, the distance between the two opening strips 4,4 between both ends of the outer sheet 2 and the two intersection points 4a,4a in the first direction is narrower than the widest distance between the two opening strips 4,4 between the intersection points 4a,4a.

[0028] As the two opening strips 4,4 described above are attached to the outer sheet 2, the third portion 2C of the outer sheet 2 widens from one end (the tab portion 2b) in the first direction towards the center (specifically, along the two opening strips 4,4).

[0029] The adhesive sheet 3 is fixed to one side of the outer sheet 2 and is positioned between the outer sheet 2 and the sheet-like food A2 when food A is packaged with the food packaging material 1. The size of the adhesive sheet 3 is not particularly limited, and in this embodiment, it is smaller than the outer sheet 2. The external shape of the adhesive sheet 3 is also not particularly limited, and for example, a rectangular shape, a polygonal shape other than a rectangle, or an elliptical shape can be adopted, but in this embodiment, it is rectangular (specifically, a rectangle). Because the adhesive sheet 3 is rectangular, the corners of the adhesive sheet 3 attached to food A can be easily grasped, so if a part of the adhesive sheet 3 is in the way when eating food A, the corner of the adhesive sheet 3 can be grasped and the food A can be eaten while avoiding that part.

[0030] Furthermore, the adhesive sheet 3 is provided with an adhesive portion 3a that is detachably fixed to the third portion 2C of the outer sheet 2 (the portion that is removed by cutting the outer sheet 2). The adhesive portion 3a is detachably fixed to the outer sheet 2 in the region between the two opening strips 4, 4 (specifically, the region between the two intersecting positions 4a, 4a). This ensures that when the outer sheet 2 is cut along the two opening strips 4, 4 to separate the third portion 2C, the adhesive portion 3a can be reliably peeled off from the third portion 2C. Also, the adhesive portion 3a is formed on a part of the adhesive sheet 3. In other words, the adhesive sheet 3 is not fixed to the outer sheet 2 in any part other than the adhesive portion 3a (it is not fixed). Furthermore, the adhesive sheet 3 is provided with multiple adhesive portions 3a. Specifically, the adhesive sheet 3 is provided with adhesive portions 3a at least two locations spaced apart in the first direction (specifically, symmetrical positions with respect to the central part of the adhesive sheet 3 in the first direction).

[0031] In other words, the adhesive sheet 3 has at least two adhesive portions 3a spaced apart in the direction in which the strip-shaped third portion 2C extends (first direction), and the area other than the adhesive portions 3a is not adhered to the outer sheet 2. This allows the adhesive sheet 3 to be more stably adhered to the outer sheet 2 than when there is only one adhesive portion 3a, and also suppresses the occurrence of wrinkles and distortions in the adhesive sheet 3 (improving the aesthetic appearance of the food packaging material 10). Furthermore, because the adhesive sheet 3 has at least two adhesive portions 3a spaced apart in the first direction, when the raw material for the food packaging material, which will be described later, is wound in the first direction, wrinkles are less likely to occur in the adhesive sheet 3 than when there is only one adhesive portion 3a. Furthermore, since the third portion 2C is a strip-shaped region extending in one direction, and the adhesive sheet 3 has at least two adhesive portions 3a spaced apart in the first direction, when the strip-shaped third portion 2C is pulled in the first direction to separate it from the first portion 2A and the second portion 2B, the adhesive portions 3a peel off from the third portion 2C one by one in sequence, making it easy to separate the adhesive sheet 3 from the outer sheet 2.

[0032] The fixing portion 3a may be heat-welded or ultrasonically welded to the outer sheet 2 (specifically, the third portion 2C), or it may be fixed with an adhesive. Furthermore, the shape of the fixing portion 3a is not particularly limited. Specifically, the fixing portion 3a is formed in a convex shape toward one end of the outer sheet 2 in the first direction. In this embodiment, the outer circumference of the fixing portion 3a toward one end of the outer sheet 2 toward that end is formed in a convex shape (more specifically, an arc shape) toward that end than the central part in the first direction. More specifically, the fixing portion 3a is formed in a circular shape.

[0033] The inner sheet 6 is divisible in a second direction. Specifically, the inner sheet 6 comprises two inner sheet pieces 6a, 6a. The two inner sheet pieces 6a, 6a are arranged in parallel in the second direction and have an overlapping portion 6b where their ends overlap. This overlapping portion 6b is located approximately in the center of the inner sheet 6 in the second direction and is formed to extend in the first direction. The inner sheet 6 becomes divisible in the second direction when the two inner sheet pieces 6a, 6a are separated in the second direction.

[0034] The food packaging material 1 configured as described above has an outer sheet 2 (specifically, the outer sheet body 2d) and an inner sheet 6 joined together so as to surround a sheet-like food A2. Specifically, as shown in Figure 2, the food packaging material 1 includes end joints 1S1, 1S1 where the outer sheet 2 (specifically, the outer sheet body 2d) and the inner sheet 6 are joined at both ends 1a, 1b in the first direction, and side joints 1S2, 1S2 where the outer sheet 2 (specifically, the outer sheet body 2d) and the inner sheet 6 are joined at both ends in the second direction. The end joints 1S1 are formed in positions that do not overlap with the overlapping portion 6b of the inner sheet 6. The side joints 1S2 are formed with a gap between them in the first direction. Between adjacent side joints 1S2, a communication portion 1S3 is formed that connects the space for containing the sheet-like food A2 to the space outside the food packaging material 1. Furthermore, two notches 2a, 2a (i.e., tabs 2b) are located at one end 1a of the food packaging material 1 in the first direction.

[0035] When wrapping the processed rice food A1 with the food packaging material 1 configured as described above, the processed rice food A1 is placed on the inner sheet 6 side of the food packaging material 1, as shown in Figure 3(a). At this time, the processed rice food A1 is positioned so that the triangular-shaped processed rice food A1 is evenly distributed on the overlapping portion 6b, and one corner of the triangular-shaped processed rice food A1 faces towards one end 1a of the food packaging material 1 in the first direction.

[0036] Next, as shown in Figure (b), the food packaging material 1 is folded in half in the first direction so that the region on one end 1a and the region on the other end 1b that are opposite it are brought together, and the folded portion is folded along the side (triangular slope) of the triangular processed rice food A1. As a result, the region on the one end 1a of the food packaging material 1 in the first direction covers the front of the triangular processed rice food A1, and the region on the other end 1b covers the back of the triangular processed rice food A1. At this time, regions are formed on the adhesive sheet 3 that are opposite each other with the food A in between, and adhesive portions 3a are located in each of these opposing regions. Then, the region of the food packaging material 1 that does not overlap with the processed rice food A1 is folded back along the triangular processed rice food A1 and overlapped on the back of the processed rice food A1 as shown in Figure (c). Then, by attaching a label (not shown) to the overlapping portion on the back of the triangular rice processed food A1 in the food packaging material 1, a food package 100 is formed, as shown in Figure 4(a), in which the food A is wrapped in the food packaging material 1.

[0037] When removing food A from such food packaging 100, the gripping portion 2b is grasped and pulled along the two opening strips 4, 4, cutting the outer sheet 2 as shown in Figure (b). This separates the third portion 2C from the first portion 2A and the second portion 2B of the outer sheet 2, dividing the outer sheet 2 into the first portion 2A and the second portion 2B. In this case, since the cutting of the outer sheet 2 proceeds along the two opening strips 4, 4, the third portion 2C becomes wider towards the center in the first direction than near the gripping portion 2b.

[0038] Furthermore, as the outer sheet 2 is cut (separation of the third part 2C from the first part 2A and the second part 2B), the adhesive part 3a of the adhesive sheet 3 peels off from the third part 2C of the outer sheet 2. Then, by pulling the first part 2A and the second part 2B in the second direction, as shown in Figure (c), food A, which consists of the rice processed food A1 and the sheet-like food A2 as a single unit, can be removed, and food A can be removed with the adhesive sheet 3 still attached.

[0039] <Second Embodiment> Next, the food packaging material 7 according to the second embodiment of the present invention will be described with reference to Figures 5 to 7. The food packaging material 7 according to the second embodiment differs from the food packaging material 1 of the first embodiment mainly in that it does not have an inner sheet 6. Therefore, the differences from the food packaging material 1 of the first embodiment will be described below.

[0040] As shown in Figures 5 and 6, the food packaging material 7 according to this embodiment comprises an outer sheet 2 and a fixing sheet 3. The food packaging material 7 further comprises a sheet-like covering portion 8 that covers a perforation 2c formed in the outer sheet 2, and two sheet-like overlapping portions 9 that are arranged to overlap the side of the outer sheet 2 on which the sheet-like covering portion 8 is installed. The outer sheet 2 also comprises one opening strip 4.

[0041] The through-hole 2c is formed in a region inside the outer peripheral edge of the outer sheet 2. Furthermore, the through-hole 2c is formed one end side of the center of the outer sheet 2 in the first direction. Also, the through-hole 2c is formed approximately in the center of the outer sheet 2 in the second direction. Furthermore, the through-hole 2c is formed in a position that does not overlap with areas of the outer sheet 2 other than the area containing the through-hole 2c when food is wrapped in the food packaging material 7.

[0042] Furthermore, the through-hole 2c is composed of a cut line that penetrates the outer sheet 2. This cut line is formed in a concave shape that opens toward the other end of the outer sheet 2 in the first direction. As a result, the tab portion 2b is formed adjacent to the through-hole 2c (specifically, inside the cut line). Also, the through-hole 2c (cut line) intersects with the opening strip 4 at a position between both ends (in other words, the tab portion 2b and the opening strip 4 overlap).

[0043] As described above, the outer sheet 2 is divided in a second direction in at least a portion of it. Specifically, by pulling the grip portion 2b from one end to the other end of the outer sheet 2 in the first direction (specifically, toward the side where the concave cut line opens), the outer sheet 2 can be cut starting from the through portion 2c (both ends of the cut line) (specifically, cut along the opening strip 4 on both sides of the opening strip 4). By cutting the outer sheet 2, a strip-shaped region between the two planned cutting lines CL, starting from both ends of the cut line forming the through portion 2c, is separated from the other region. As a result, at least a portion of the outer sheet 2 is divided in the second direction. In other words, the strip-shaped region separated by the cutting of the outer sheet 2 (in this embodiment, the region from the through portion 2c in the first direction toward the other end of the outer sheet 2) becomes the third portion 2C of the outer sheet 2, and the regions on both sides of the third portion 2C of the outer sheet 2 become the first portion 2A and the second portion 2B.

[0044] The adhesive sheet 3 is positioned between the outer sheet 2 and the food when food is packaged with the food packaging material 7. The adhesive portion 3a of the adhesive sheet 3 is detachably fixed to one side of the outer sheet 2 (the side that faces the food when food is packaged with the food packaging material 7). The adhesive portion 3a is also detachably fixed to the outer sheet 2 at a position that overlaps with the opening strip 4. This ensures that when the outer sheet 2 is cut along the opening strip 4 to separate the third portion 2C, the adhesive portion 3a can be reliably peeled off from the third portion 2C.

[0045] The opening strip 4 has its first direction as the length direction and is located approximately in the center of the outer sheet 2 in the second direction. When the outer sheet 2 is cut on both sides of the opening strip 4, at least a portion of the outer sheet 2 becomes separable in the second direction.

[0046] The sheet-like covering portion 8 is formed to cover only the penetration portion 2c and the area surrounding the penetration portion 2c. The shape of the sheet-like covering portion 8 is not particularly limited and can be circular, square, or the like. In this embodiment, the shape of the sheet-like covering portion 8 is square. The sheet-like covering portion 8 is positioned to overlap the area inside the outer peripheral edge of the outer sheet 2. The sheet-like covering portion 8 is positioned to one end of the center of the outer sheet 2 in the first direction. The sheet-like covering portion 8 is positioned approximately in the center of the outer sheet 2 in the second direction. The sheet-like covering portion 8 is also positioned to overlap one side of the outer sheet 2 (the side that faces the food when wrapping food). The sheet-like covering portion 8 is also positioned to cover a part of the opening strip 4 (specifically, the part located inside the tab portion 2b) (specifically, to overlap with the cutting position of the outer sheet 2).

[0047] At least a portion of the sheet-like covering portion 8 is bonded to the outer sheet 2. For example, an annular region along the outer circumference of the sheet-like covering portion 8 (for example, a rectangular frame-shaped region) may be bonded to the outer sheet 2, or the entire surface of one side of the sheet-like covering portion 8 may be bonded to the outer sheet 2. The method of bonding the sheet-like covering portion 8 and the outer sheet 2 is not particularly limited, and for example, heat sealing, ultrasonic sealing, adhesive, etc., can be used.

[0048] The thickness of the sheet-like covering portion 8 is not particularly limited. For example, the thickness of the sheet-like covering portion 8 may be approximately the same as the thickness of the sheet-like overlapping portion 9, it may be thicker than the sheet-like overlapping portion 9, or it may be thinner than the sheet-like overlapping portion 9.

[0049] The sheet-like overlapping portion 9 is formed in a strip shape extending in the first direction. Furthermore, the sheet-like overlapping portion 9 is positioned across the entire area between both ends of the outer sheet 2 in the first direction. Additionally, the sheet-like overlapping portion 9 is located away from the sheet-like covering portion 8 in the second direction. Furthermore, the sheet-like overlapping portion 9 is located closer to the edge than the center of the outer sheet 2 in the second direction. Finally, the sheet-like overlapping portion 9 is positioned spaced apart from the edge of the outer sheet 2 toward the center in the second direction.

[0050] Furthermore, the sheet-like overlapping portion 9 overlaps one side of the outer sheet 2 (the side that faces the food when packaging food). Also, the sheet-like overlapping portion 9 does not overlap the cutting position of the outer sheet 2 (the cutting position extending in the first direction) (specifically, it is located spaced apart from the opening strip 4 in the second direction). In this embodiment, the food packaging material 7 has two sheet-like overlapping portions 9, and these two sheet-like overlapping portions 9 are spaced apart in the second direction (specifically, they overlap with each of the ends of the outer sheet 2 in the second direction). In the second direction, the through portion 2c, the sheet-like covering portion 8, and the opening strip 4 are located between the two sheet-like overlapping portions 9.

[0051] At least a portion of the sheet-like overlapping portion 9 is bonded to the outer sheet 2. For example, the portion of the sheet-like overlapping portion 9 that is inside both ends in the second direction may be bonded to the outer sheet 2 along the first direction, or the entire surface of one side of the sheet-like overlapping portion 9 may be bonded to the outer sheet 2. The method of bonding the sheet-like overlapping portion 9 to the outer sheet 2 is not particularly limited, and for example, heat sealing, ultrasonic sealing, adhesive, etc., can be used.

[0052] Furthermore, the thickness of the sheet-like overlapping portion 9 is not particularly limited. For example, the thickness of the sheet-like overlapping portion 9 may be approximately the same as that of the sheet-like covering portion 8, or it may be thicker or thinner than the sheet-like covering portion 8. Also, the thickness of the sheet-like overlapping portion 9 may be approximately the same as that of the opening strip 4, or it may be thicker or thinner than the opening strip 4. Note that "approximately the same thickness" means that the ratio of the thickness of the sheet-like overlapping portion 9 to the thickness of the sheet-like covering portion 8 (or the opening strip 4) is 0.9 to 1.1.

[0053] The sheet material constituting the sheet-like overlapping portion 9 is not particularly limited, and for example, the same or different sheet material as the outer sheet 2 (e.g., nonwoven fabric) can be used. In terms of having approximately the same thickness as the sheet-like covering portion 8, it is preferable to use the same sheet material as the sheet material constituting the sheet-like covering portion 8.

[0054] When packaging food A' using the food packaging material 7 configured as described above, the food A' is wrapped with the food packaging material 7 (specifically, the outer sheet 2) along the shape of food A', such that one side of the outer sheet 2 (the side on which the adhesive sheet 3 is superimposed) faces food A'. At this time, the adhesive sheet 3 forms opposing regions on either side of food A', and adhesive portions 3a are located in each of these opposing regions. As a result, a food package 100 is formed in which food A' is wrapped with the food packaging material 7, as shown in Figure 7(a). Food A' is not particularly limited and examples include hamburgers, daifuku (rice cakes filled with sweet bean paste), etc.

[0055] When removing food A' from such food packaging 100, the gripping portion 2b is grasped and pulled along the opening strip 4, cutting the outer sheet 2 as shown in Figure (b). This separates the third portion 2C of the outer sheet 2 from the first portion 2A and the second portion 2B, and at least a portion of the food packaging material 7 is divided in the second direction. In addition, along with the cutting of the outer sheet 2 (i.e., the separation of the third portion 2C from the first portion 2A and the second portion 2B), the adhesive portion 3a of the adhesive sheet 3 peels off from the third portion 2C. By separating the first portion 2A and the second portion 2B of the food packaging material 7 in the second direction, food A' with the adhesive sheet 3 attached can be removed as shown in Figure (c).

[0056] <Third Embodiment> Next, the food packaging material 10 according to the third embodiment of the present invention will be described with reference to Figures 8 to 11. The food packaging material 10 according to the third embodiment differs from the food packaging material 7 of the second embodiment mainly in the configuration of the sheet-like covering portion 8 and in the absence of a sheet-like overlapping portion 9. Therefore, the differences from the food packaging material 7 of the second embodiment will be described below.

[0057] In the food packaging material 10 according to this embodiment, the sheet-like covering portion 8 is formed in a strip shape extending in the second direction. The sheet-like covering portion 8 is also arranged along the entire length of the outer sheet 2 in the second direction. In addition, in the food packaging material 10, the penetration portion 2c is formed near one end of the outer sheet 2 in the first direction. Therefore, the sheet-like covering portion 8 is located near one end of the outer sheet 2 in the first direction.

[0058] Furthermore, the food packaging material 10 is equipped with two opening strips 4, and the two opening strips 4, 4 are positioned spaced apart in the second direction. One end of each opening strip 4 is located near the penetration portion 2c and between the ends of the cut line that constitutes the penetration portion 2c. In addition, the fixing portion 3a of the fixing sheet 3 is detachably fixed to the outer sheet 2 (specifically, the outer sheet body 2d) between the two opening strips 4, 4. This ensures that when the outer sheet 2 is cut along the two opening strips 4, 4 to separate the third portion 2C, the fixing portion 3a can be reliably peeled off from the third portion 2C. Also, the central part of the fixing sheet 3 in the first direction coincides with the approximate central part of the outer sheet 2 in the first direction.

[0059] When packaging food A'' using the food packaging material 10 configured as described above, a pillow packaging machine or the like can be used. Specifically, as shown in Figure 10(a), the food packaging material 10 is made into a cylindrical shape so that both ends 1a and 1b of the food packaging material 10 face each other in the first direction, and the opposing ends 1a and 1b are sealed together (specifically, forming a sealed portion 1S4), and the food A'' is placed inside and the openings at both ends are sealed (specifically, forming a sealed portion 1S4). At this time, the adhesive sheet 3 has regions that face each other with food A in between, and adhesive portions 3a are located in each of these opposing regions. As a result, as shown in Figure 10(b), a food package 100 is formed in which food A'' is packaged with food packaging material 10. Food A'' is not particularly limited and can be, for example, a hot dog or an eclair.

[0060] When removing food A'' from such food packaging 100, the gripping portion 2b is grasped and pulled along the opening strip 4, cutting the outer sheet 2 as shown in Figure 11(a). This separates the third portion 2C of the outer sheet 2 from the first portion 2A and the second portion 2B, and at least a portion of the food packaging material 10 is divided in the second direction. In addition, along with the cutting of the outer sheet 2 (i.e., the separation of the third portion 2C from the first portion 2A and the second portion 2B), the adhesive portion 3a of the adhesive sheet 3 peels off from the third portion 2C. Then, by separating the first portion 2A and the second portion 2B of the food packaging material 10 in the second direction, food A'' with the adhesive sheet 3 attached can be removed as shown in Figure 11(b).

[0061] As described above, the food packaging materials 1, 7, and 10 according to each embodiment can be easily removed from food, and the adhesive sheet 3 can be smoothly separated from the outer sheet 2.

[0062] In other words, with the food packaged in the food packaging materials 1, 7, and 10, the third part 2C can be separated from the first part 2A and the second part 2B, allowing the food to be removed from between the first part 2A and the second part 2B, thus making it easy to remove the food packaging materials 1, 7, and 10 from the food.

[0063] Furthermore, when the third part 2C is separated from the first part 2A and the second part 2B while the food is packaged with the food packaging materials 1, 7, and 10, the adhesive portion 3a of the adhesive sheet 3 peels off from the third part 2C. Therefore, when removing the food packaging materials 1, 7, and 10 from the food, it is not necessary to peel the adhesive portion 3a of the adhesive sheet 3 from the outer sheet 2. As a result, the adhesive sheet 3 can be smoothly separated from the outer sheet 2. Also, once the food packaging materials 1, 7, and 10 are removed from the food, the adhesive sheet 3 and the food become one, allowing the food to be consumed hygienically without directly touching it with one's hands.

[0064] Furthermore, since the adhesive sheet 3 has at least one adhesive portion 3a, and the area other than the adhesive portion 3a is not adhered to the outer sheet 2, the separation of the third portion 2C can be performed with less resistance than when the entire adhesive sheet 3 is adhered to the outer sheet 2 (in other words, when the entire adhesive sheet 3 is an adhesive portion 3a). Furthermore, for example, when the fixing portion 3a is pressed to fix the outer sheet 2, having at least one fixing portion 3a and ensuring that the area other than the fixing portion 3a is not fixed to the outer sheet 2 allows the pressure applied during pressing to be concentrated in a less intense area compared to when the entire fixing sheet 3 is a fixing portion 3a, thus enabling stable fixing of the fixing sheet 3 to the outer sheet 2.

[0065] It should be noted that the food packaging material according to the present invention is not limited to the above embodiments, and various modifications are possible without departing from the spirit of the present invention. Furthermore, the configurations and methods of the above-described embodiments may be arbitrarily adopted and combined (configurations and methods of one embodiment may be applied to configurations and methods of other embodiments), and of course, configurations and methods relating to the various modification examples described below may be arbitrarily selected and adopted in the configurations and methods of the above-described embodiments.

[0066] For example, in the above embodiment, the outer sheet 2 is equipped with an opening strip 4, but it is not limited to this, and may be configured without an opening strip 4 (for example, by the outer sheet body 2d only).

[0067] Furthermore, in the above embodiment, the food packaging material 1 and 10 are provided with two opening strips 4, and the food packaging material 7 is provided with one opening strip 4. However, the invention is not limited to this, and for example, the food packaging material 1 and 10 may be configured to be provided with one opening strip 4, or the food packaging material 7 may be configured to be provided with two opening strips 4.

[0068] Furthermore, in the above embodiment, the third portion 2C of the outer sheet 2 is formed in a strip shape, but is not limited to this, and may be formed in a circular or rectangular shape, for example. That is, the outer sheet 2 may be configured so that when it is cut, a circular or rectangular region (the third portion 2C) is separated from the other regions (the first portion 2A and the second portion 2B).

[0069] Furthermore, in the above embodiment, the area of ​​the adhesive sheet 3 other than the adhesive portion 3a is not adhered to the outer sheet 2, but is not limited to this, and for example, the area other than the adhesive portion 3a may be peelably adhered to the first portion 2A and / or the second portion 2B.

[0070] Furthermore, in the above embodiment, the adhesive sheet 3 has two adhesive portions 3a, but it is not limited to this, and may be configured to have one or three or more, for example. In the first embodiment, when there is one adhesive portion 3a, it is preferable that the adhesive portion 3a is positioned so as to overlap with the bottom surface of the rice processed food A1 when the food packaging material 1 is folded in half to sandwich the rice processed food A1. When the adhesive portion 3a overlaps with the bottom surface of the rice processed food A1, the direction in which the third portion 2C is pulled when the outer sheet 2 is cut and the third portion 2C is separated is closer to 90° with respect to the adhesive portion 3a than when the adhesive portion 3a overlaps with the front or back of the rice processed food A1. For this reason, the adhesive portion 3a can be peeled off more easily than when the adhesive portion 3a overlaps with the front or back of the rice processed food A1.

[0071] Furthermore, although the fixing portion 3a is formed in a circular shape in the above embodiment, it is not limited to this, and may be a polygonal shape such as a triangular or quadrilateral shape (preferably a polygonal shape having a corner that is convex toward one end of the outer sheet 2 in the first direction), or it may be a linear shape such as a continuous line or dashed line extending in the first direction.

[0072] Furthermore, in the above embodiment, the through portion 2c is formed by a cut line, but is not limited to this. For example, it may be formed by tearing the outer sheet 2 at the position of a perforation, a half-cut, etc., or it may be composed of at least one through hole.

[0073] Furthermore, in the above embodiment, the sheet-like covering portion 8 overlaps the other side of the outer sheet 2 (the side that faces the food when the food is wrapped), but it is not limited to this, and for example, the sheet-like covering portion 8 may overlap one side of the outer sheet 2 (the side that faces outwards when the food is wrapped).

[0074] Furthermore, in the above embodiment, the sheet-like overlapping portion 9 is continuously arranged over the entire area between both ends of the outer sheet 2 in the first direction, but it is not limited to this, and for example, multiple sheet-like overlapping portions 9 may be arranged at intervals in the first direction. Also, in the second embodiment, the food packaging material 7 is configured to have two sheet-like overlapping portions 9, but it is not limited to this, and for example, it may be configured to have only one sheet-like overlapping portion 9.

[0075] Furthermore, in the above embodiment, the sheet-like overlapping portion 9 is formed separately from the outer sheet 2, but this is not limited to this, and for example, it may be formed integrally with the outer sheet 2. Specifically, the opposing ends of a single sheet material forming the outer sheet 2 and the sheet-like overlapping portion 9 may be folded back, so that the folded ends form the sheet-like overlapping portion 9 and the other parts form the outer sheet 2.

[0076] A raw material (not shown) for food packaging may be formed by continuously arranging (specifically, continuously in the first direction) the food packaging materials 1, 7, and 10 according to each of the above embodiments. In other words, the food packaging materials 1, 7, and 10 may be cut from a raw material for food packaging.

[0077] Furthermore, in the first embodiment described above, the inner sheet 6 comprises two inner sheet pieces 6a, 6a, but it is not limited to this, and may be configured to comprise, for example, three or more inner sheet pieces 6a...

[0078] Furthermore, in the first embodiment described above, the food packaging material 1 is folded in half so as to sandwich the processed rice food A1, and then the area of ​​the food packaging material 1 that does not overlap with the processed rice food A1 is folded back along the triangular shape of the processed rice food A1. However, the invention is not limited to this. For example, without folding back the area of ​​the food packaging material 1 that does not overlap with the processed rice food A1 along the triangular shape of the processed rice food A1, the outer peripheral edge of the front side area of ​​the food packaging material 1 and the outer peripheral edge of the back side area of ​​the processed rice food A1 may be sealed to form a rectangular food packaging body (not shown).

[0079] Furthermore, in the first embodiment described above, the fixing portion 3a is detachably fixed to the outer sheet 2 at a position that does not overlap with the opening strip 4, but is not limited to this, and for example, it may be detachably fixed to the outer sheet 2 at a position that overlaps with the opening strip 4.

[0080] Furthermore, in the second and third embodiments described above, the fixing portion 3a is detachably fixed to the outer sheet 2 at a position overlapping with the opening strip 4, but the invention is not limited to this, and for example, it may be detachably fixed to the outer sheet 2 at a position that does not overlap with the opening strip 4. [Explanation of Symbols]

[0081] 1,7,10…Food packaging material, 1S1…End joint, 1S2…Side joint, 1S3…Connecting part, 2…Outer sheet, 2A…First part, 2B…Second part, 2C…Third part, 2a…Cut part, 2b…Tap part, 2c…Penetration part, 3…Adhesive sheet, 3a…Adhesive part, 4…Opening strip, 4a…Intersection position, 6…Inner sheet, 6a,6a…Inner sheet piece, 6b…Overlap part, 8…Sheet-like covering part, 9…Sheet-like overlap part, 100…Food packaging body, A,A',A''…Food, A1…Rice processed food, A2…Sheet-like food, CL…Planned cutting line

Claims

1. The material comprises an outer sheet that is formed between a first portion and a second portion and is detachable from the first and second portions, having a third portion that widens from one end toward the center in the first direction, and an adhesive sheet that overlaps with the outer sheet and is detachably fixed to the outer sheet, is not fixed to the first and second portions but is directly fixed to the third portion, the adhesive sheet having a pair of adhesive portions that are detachably fixed to the third portion of the outer sheet, The pair of fastening parts are positioned opposite each other so as to sandwich the food when the food is packaged. Food packaging materials.

2. The third part is a band-shaped region extending in one direction on the outer sheet, and the adhesive sheet has at least one adhesive portion, with the region other than the adhesive portion being non-adherent to the outer sheet, according to claim 1.

3. The outer sheet is equipped with at least two opening strips. The food packaging material according to claim 1 or 2, wherein the adhesive portion of the adhesive sheet is fixed to the outer sheet between two adjacent opening strips.

4. The invention is characterized in that a plurality of food packaging materials described in any one of claims 1 to 3 are provided in a continuous manner. Original food packaging material.

5. The invention comprises a food packaging material according to any one of claims 1 to 3, and a food packaged in the food packaging material, The food overlaps with at least a portion of the adhesive sheet. Food packaging.

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