CN110857160A

CN110857160A - Packaging sheet

Info

Publication number: CN110857160A
Application number: CN201910778553.2A
Authority: CN
Inventors: 铃木荣一
Original assignee: Suzuki Co Ltd
Current assignee: Suzuki Co Ltd
Priority date: 2018-08-22
Filing date: 2019-08-22
Publication date: 2020-03-03
Anticipated expiration: 2039-08-22
Also published as: CN110857160B; TW202015541A; KR20200022340A; JP6411694B1; JP2020029288A

Abstract

The invention provides a packaging sheet which prevents a sheet-like food from being affected with moisture and prevents hands from being soiled when the sheet-like food is opened. The packaging sheet (10) of the present invention is a packaging sheet of a rice block formed by integrally sandwiching a sheet-like food (40) between an outer film (20) and an inner film (30) provided so as to overlap with the outer film, wherein the inner film has an inner breakable portion (31) having: the inner film comprises an inner folded portion including an inner first folded portion (32) and an inner second folded portion (33) formed by folding a recess and a projection of an inner film in a longitudinal direction, an inner cylindrical portion (36) formed by joining one or a vicinity of the inner folded portion to an inner film facing the inner film via an inner joining portion (35) at an overlapping region (34) sandwiched by the inner first folded portion and the inner second folded portion, and an inner breakable portion (37) formed in the inner cylindrical portion and formed by pulling in a direction orthogonal to the inner folded portion to break the inner cylindrical portion along the inner folded portion. A dirty-proof sheet (90) can be interposed between the outer film and the sheet-like food.

Description

Packaging sheet

Technical Field

The present invention relates to a packaging sheet formed by sandwiching a sheet-like food between an inner film and an outer film and capable of packaging a rice lump, and relates to a packaging sheet capable of preventing hands from being stained when unsealing.

Background

As a packaging sheet for rice balls or the like sold in convenience stores or the like, a sheet having a triple structure in which a sheet-like laver is sandwiched between an outer film and an inner film is known.

The outer film has an outer breakable portion in the center in the width direction, the outer breakable portion being like a dicing tape for breaking the outer film, and the inner film includes two inner film sheets. The two inner films are thermally welded to the outer film in a state where the inner ends of the inner film sheets are overlapped on the outer breakable portions of the outer film (see, for example, patent document 1).

The outer film is divided into two parts at the outer side breakable part of the rice block packaged by the packaging sheet, and one inner film sheet thermally welded to the outer film is pulled out together by pulling one of the broken outer films to the outside.

Further, by pulling together the remaining outer film sheet and the same remaining inner film sheet, the package can be unpacked and a rice nugget can be obtained in which the sheet-like food is directly entangled.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2002-101832.

Disclosure of Invention

Problems to be solved by the invention

The inner membranes simply overlap the inner ends of the inner membrane sheets with one another. Therefore, in storage and transportation after the production of the wrapping sheet, and further, when the rice nuggets are wrapped with the wrapping sheet, moisture may enter the wrapping sheet from the overlapping portion between the inner film sheets, and the sheet-like food may be affected with moisture. As a result, the sheet-like food may be stuck, wrinkled or wavy. The sheet-like food in this state may be caught on the film and broken when the package of the rice nuggets is unpacked.

Further, since the sheet-like food needs to be directly contacted when opening the package, if the hands are dirty, the sticking matter of the sheet-like food adheres to the hands, which is not hygienic.

The purpose of the present invention is to provide a packaging sheet that prevents sheet-like food from becoming damp even when rice nuggets are packaged.

Means for solving the problems

The packaging sheet of the present invention is formed by sandwiching and integrating a sheet-like food between an outer film and an inner film provided so as to overlap with the outer film,

the outer film has an outer breakable portion longitudinally intersecting the outer film,

the inner film has an inner breakable portion at a position substantially opposite to the outer breakable portion,

the inner breakable part has: an inner folded portion including an inner first folded portion and an inner second folded portion formed by folding a recess and a projection of the inner film in a longitudinal section thereof, an inner tubular portion formed by joining one or a vicinity of the inner first folded portion and the inner second folded portion of the inner folded portion to the inner film facing thereto via an inner joining portion at an overlapping region sandwiched by the inner first folded portion and the inner second folded portion, and an inner breakable portion formed in the inner tubular portion and formed by pulling in a direction orthogonal to the inner folded portion to break the inner tubular portion along the inner folded portion,

the outer film and the inner film are welded together at the outer periphery of the sheet-like food by a welding portion.

A dirty-proof sheet is disposed between the outer film and the sheet-like food.

The anti-dirty hand piece can be easily peeled off and is thermally welded on the outer film.

The inner breakable portion may be an intermittent cut strip extending substantially parallel to the inner fold portion, and cutting the inner film in a longitudinal direction.

The inner breakable part may be a cut line formed substantially in parallel with the inner fold part at substantially the center of the inner film in the longitudinal direction.

The inner joint portion may be formed by bonding the overlapping region to the inner film.

Preferably, the inner film has a band-shaped reinforcing portion formed from substantially the center of an end edge parallel to the inner breakable portion toward the inner breakable portion, the band-shaped reinforcing portion reinforcing the inner film.

The outer breakable portion may further include: an outer fold portion including an outer first fold portion and an outer second fold portion formed by a concave fold and a convex fold, an outer tubular portion formed by joining one or a vicinity of the outer first fold portion and the outer second fold portion of the outer fold portion to the outer film facing each other via an outer joining portion at an overlapping region sandwiched by the outer first fold portion and the outer second fold portion, and an outer breakable portion formed in the outer tubular portion and formed by pulling in a direction orthogonal to the outer fold portion to break the outer tubular portion along the outer fold portion.

The inner first folding portion is disposed on the side of the rice block, and the inner joining portion is a portion where the inner first folding portion is joined to the inner film,

a band-shaped cover sheet is joined to the inner film along the inner first fold portion to cover the inner first fold portion.

In addition, the packaged rice block is formed by packaging the rice block through the packaging sheet.

Effects of the invention

According to the packaging sheet of the present invention, the inner film is folded at the inner first fold portion and the inner second fold portion and is airtightly joined by the inner joining portion, and therefore, passage of moisture through the inner film is suppressed, and the sheet-like food can be maintained in a dry state. Further, when the inner film is pulled in a direction orthogonal to the inner fold portion, the inner joint portion is released from the joint, and the inner cylindrical portion is expanded. Then, the inner film can be broken by breaking the inner film from the inner breakable portion formed in the inner cylindrical portion. Therefore, the package of the wrapped rice nuggets in which the rice nuggets are wrapped by the wrapping sheet of the present invention can be easily unwrapped.

In the case of the inner film having a structure in which the inner first fold portion is disposed on the side abutting the rice block and the inner first fold portion is joined to the inner film by the inner joining portion, the inner film is covered with a band-shaped cover sheet covering the inner first fold portion. Thus, the inner first fold does not directly contact the rice block. Since the rice block has adhesiveness, when the inner film is pulled to unfold the inner first fold portion, if the inner first fold portion directly contacts the rice block, the rice block is hardly unfolded and there is a risk of breakage. In addition, even when the inner joining portion is partially coated with a heat-sensitive adhesive, the adhesive does not adhere to the rice lump because the inner joining portion does not directly contact the rice lump and the cover sheet is interposed therebetween.

In this case, since the stain-proof hand sheet is disposed between the outer film and the sheet-like food, and the sheet-like food appearing when the outer film is pulled is covered with the stain-proof hand sheet, a person who unpacks the package does not need to directly touch the sheet-like food with his/her hand by grasping the sheet-like food from the stain-proof hand sheet, and even if the hand is dirty, the stain does not adhere to the sheet-like food, and even if the sheet-like food is stuck, the stuck matter does not adhere to his/her hand, and thus the sheet-like food.

Drawings

FIG. 1 is an exploded perspective view showing one embodiment of a packaging sheet according to the present invention;

FIG. 2 is a plan view of the wrapping sheet from the inner film side;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a perspective view of a wrapped rice nugget wrapped with a wrapper sheet according to the present invention;

FIG. 5 is a perspective view in the middle of unpacking the package of wrapped rice nuggets;

fig. 6 is an explanatory diagram showing a process of breaking the inner membrane;

FIG. 7 is a cross-sectional view showing a packaging sheet of a different embodiment of the present invention;

FIG. 8 is a plan view showing an embodiment in which a reinforcement is formed at an inner film;

FIG. 9 is a plan view of a wrapping sheet from the inner film side showing a further different embodiment of the present invention;

FIG. 10 is a cross-sectional view taken along line D-D of FIG. 9;

fig. 11 is an explanatory view showing a process of cutting off the inner film in the packaging sheet of fig. 9.

Detailed Description

Hereinafter, a wrapping sheet 10 according to the present invention and a wrapped rice nugget 60 formed by wrapping rice nuggets 50 with the wrapping sheet 10 will be described with reference to the drawings.

As shown in fig. 1 to 3, the packaging sheet 10 of the present invention is formed by overlapping an outer film 20, a dirty-hand-proof sheet 90, a sheet-like food 40, and an inner film 30. The dirty-hand prevention sheet 90 is a portion for preventing dirty hands, and may be disposed as necessary. As shown in fig. 2 and 3, the outer film 20 and the inner film 30 are hermetically integrated by a heat-fusion portion 11 heat-fused to the peripheral edge of the sheet-like food 40. In the drawings, the thicknesses of the

films

20 and 30 and the like, the thickness of the inner joint 35 described later, and the like are exaggerated for ease of explanation. In the following description, terms such as the longitudinal direction, the width direction, and the longitudinal section are used, but these directions and the like are based on the directions of fig. 1 and the like, and it should be understood that these directions are replaced with each other according to the shape of the packaging sheet 10.

The outer film 20 and the inner film 30 can be substantially rectangular films. In the illustrated embodiment, the outer and

inner films

20, 30 are rectangular films having a length of about 23cm and a width of about 16cm, and the outer and

inner films

20, 30 are polygonal shapes with corners cut off. Of course, the shape and size of the

films

20 and 30 are not limited to those described above.

The outer film 20 has an outer breakable portion 21 that enables the outer film 20 to be torn in a direction over the full length or width of the outer film. The outer breakable portion 21 is configured by attaching two dicing

tapes

28, 28 in the longitudinal direction of the outer film 20 in the illustrated embodiment, and a pair of break start

portions

29, 29 are formed at the end edge of the outer film 20 with the dicing

tapes

28, 28 therebetween. Although the outer breakable portion 21 is formed at the center in the width direction of the outer film 20 in the drawings, a configuration that is offset to either side may be employed.

The outer breakable portion 21 may be formed by cutting the outer film 20 into discontinuous wiring holes. In this case, in order to prevent moisture or the like from entering from the cut strip, it is desirable to dispose a coating film having a small width on the inner surface of the outer film 20 along the cut strip.

The outer breakable portion 21 may have the same configuration as the inner breakable portion 31 of the inner membrane 30 shown below (see fig. 7 (b)).

As shown in fig. 1 to 3, the inner film 30 is a film in which the outer periphery is heat-welded to the outer film 20 by the heat-welded portion 11, and has an outer shape substantially the same as that of the outer film 20.

An inner breakable portion 31 is formed in the inner film 30. The inner breakable portion 31 may be formed at a position opposite to the outer breakable portion 21, and in the illustrated embodiment, the inner breakable portion 31 is formed by longitudinally cutting the inner film 30.

As shown in fig. 1 to 3, the inner film 30 has an inner breakable portion formed longitudinally. The inner breakable portion 37 is a region where the inner film 30 is broken or a starting point of the breaking when the inner film 30 is pulled in a direction orthogonal to the inner breakable portion 31. In the illustration, the inner breakable portion 37 is provided as an intermittent cut like a wire connection hole.

The inner breakable part 37 is formed over the entire length between the end edges of the inner film 30, but may be formed only in the center. In this case, as shown in fig. 8, the inner breakable portion 37 may also be a single cut strip. The inner breakable part 37 may be a part in which the inner film 30 is thinned by forming a groove with a heated iron, a rotary circular knife, a roller, or the like.

The inner film 30 having the inner breakable portion 37 is formed with the inner first fold 32 and the inner second fold 33 by being bent and bent in the vicinity of the inner breakable portion 37. The interval between the

inner folds

32 and 33 can be set to about 1cm to 3 cm. The inner breakable portions 37 constitute the inner folds 32, 33 so as to be located in the overlapping region 34 where the inner films 30 overlap each other due to the inner folds 32, 33.

The overlapping region 34 sandwiched by the inner folds 32, 33 airtightly joins the vicinity of one inner fold to the opposing inner film 30 (inner joint 35), forming a cylindrical inner cylindrical portion 36. The inner joint 35 is formed such that the inner breakable portion 37 is located on the circumferential surface of the inner cylindrical portion 36. In the illustrated embodiment, the inner joining portion 35 joins the inner first fold 32 to the inner film 30. The inner joining portion 35 can be formed by any joining method such as adhesion or thermal fusion if it can be joined airtightly, but as described later, it is desirable to join them with the following strength: when the inner film 30 is pulled, the engagement by the inner engagement portion 35 is released. For example, the inner joint 35 can be formed by heat sealing or partial coating (part coat), and can be formed in a linear, wavy, zigzag shape or the like. By adjusting the width of the inner joint portion 35 and by forming the seal shape into a wavy or zigzag shape, the joint strength of the inner joint portion 35 can be easily controlled, and the ease of peeling when pulling the inner film 30 can be adjusted.

By joining the inner first fold 32 to the inner film 30 in an airtight manner, the inner film 30 is formed as one continuous airtight film as shown in fig. 1 and 3. The inner breakable part 37 is formed of a cut strip, and has air permeability, but the inner film 30 is air-tightly continuous at the inner joining part 35, and therefore, intrusion of moisture or the like can be prevented.

Further, the inner film 30 is preferably made of a material having high separability (detachable) from the rice block 50 because it is in contact with the rice block 50.

As shown in fig. 1 and the like, the contamination prevention sheet 90 is disposed between the outer film 20 and the sheet-like food 40. The anti-contamination hand piece 90 is rectangular in the illustrated embodiment, but is not limited thereto.

The anti-dirty hand sheet 90 can be slightly smaller than the sheet-like food 40. In order to be able to grasp the sheet-like food 40 and the rice block 50 from the dirty-hand prevention sheet 90, the dirty-hand prevention sheet 90 is desirably sized to extend from the bottom surface to both side surfaces of the rice block 50.

As described later, in order to position the outer film 20, as shown in fig. 2, it is desirable that the outer film 20 is heat-welded 91 such as spot welding in which the dirty-hand sheet 90 is easily peeled off.

The sheet-like food 40 may be sheet-like laver. The sheet-like food 40 is placed substantially at the center of the back surface side of the outer film 20. The sheet-like food 40 may be a food having a substantially rectangular shape, but may be a food having a rectangular shape with its corners chamfered, a food having a longitudinal end chamfered in a rounded manner, or the like. In the illustrated embodiment, the length of the sheet of food product 40 is about 19cm in the lengthwise direction and about 10cm in the widthwise direction.

The sheet-like food 40 is not limited to sheet-like laver, and if it is a thin food, a food obtained by thinly flattening dried squid or a food obtained by forming kelp pine (おぼろ昆布) into a sheet-like shape can be used.

As shown in fig. 1, the outer film 20, the anti-soiling sheet 90, the sheet-like food 40, and the inner film 30 are arranged such that the sheet-like food 40 is placed substantially in the center of the back surface of the outer film 20. In the case where the contamination prevention hand sheet 90 is heat-welded 91 to the outer film 20 so as to be easily peeled off for positioning, the contamination prevention hand sheet 90 is heat-welded 91 to the outer film 20 in advance.

Then, the inner film 30 is superimposed on the sheet-like food 40, and as shown in fig. 2 and 3, the peripheral edges of the outer film 20 and the inner film 30 are heat-welded in a linear manner so as to surround the sheet-like food 40 to form the heat-welded portion 11, thereby producing the packaging sheet 10. It is desirable that the heat fusion part 11 is not applied at a position where the outside breakable part 21 and the inside breakable part 31 face each other.

In the packaging sheet 10, in order to prevent the sheet-like food 40 from shifting in the packaging sheet 10, it is desirable to form linear or dot-shaped heat-fusion portions 12 on both sides in the width direction and both sides in the length direction of the sheet-like food 40, as shown in fig. 2 and 3. In this case, if the stain-proof hand sheet 90 is also heat-welded, the stain-proof hand sheet 90 may be broken or the stain-proof hand sheet may remain without being peeled off at the time of opening, and therefore, it is desirable that the heat-welded portion 12 is applied to the outside of the stain-proof hand sheet 90.

The inner film 30 of the produced packaging sheet 10 is formed of a single film, and the inner film 30 is formed with an inner breakable portion 37 such as a slit in the inner cylindrical portion 36, but the inner first fold portion 32 is airtightly joined by the inner joining portion 35, and thus a continuous airtight film is formed. Therefore, the invasion of moisture or the like caused by the inner film 30 can be substantially completely prevented, and the dry state of the contained sheet-like food 40 can be appropriately maintained for a long period of time.

The rice cake 50 is packed in the packing sheet 10. The rice cake 50 (see fig. 4) is a cake that is formed by solidifying white rice, assorted rice, etc. into a flat shape or a spherical shape. The rice block 50 may be partially or entirely sprinkled with food such as sesame (vibration り hanging け food), or may be placed with side dishes (utensil material), or may be sandwiched therebetween. In the present embodiment, the lump 50 is a triangular flat lump, but may be a round lump or a square lump.

The rice nuggets 50 are wrapped with the wrapping sheet 10 having the above-described structure as shown in fig. 4, and the overlapping portions and corner portions of the wrapping sheet 10 are fixed by fixing means 70 such as tape or thermal fusion, thereby obtaining a wrapped rice nugget 60. In the obtained packaged rice cake 60, hot air from the rice cake 50 and moisture contained in the rice cake 50 do not pass through the inner film 30, so that the sheet-like food 40 can be prevented from being affected with moisture in a packaged state, and the occurrence of sticking, wrinkling, and waving of the sheet-like food 40 can be suppressed. Further, since the sheet-like food 40 can be kept in a dry state, the sheet-like food 40 does not get caught on the

films

20 and 30 and does not break even when the wrapped rice nuggets 80 are unpacked.

The wrapped rice nuggets 60, which are formed by wrapping the rice nuggets 50 with the wrapping sheet 10 of the present invention, can be unwrapped by the following procedure. To unpack the package, first, the dicing

tapes

28, 28 existing between the cutting

start parts

29, 29 of the outer breakable part 21 of the outer film 20 are pinched and pulled to be cut into two

outer film pieces

20a, 20b (fig. 6 (a)). The corner 15 is raised by peeling off one of the fastening means 70 positioned on the left and right sides continuously from the cut of the outer film 20, and the rice cake 50 is gripped from the cut outer film piece 20B and pulled in the direction of arrow B in fig. 5.

As a result, as described below with reference to fig. 6, the inner membrane 30 is broken into

inner membrane sheets

30a and 30b (fig. 6(a) to 6(d)), and the outer membrane sheet 20a and the inner membrane sheet 30a are removed together. At this time, when the anti-soiling sheet 90 is heat-welded 91 to the outer film 20, the heat-weld 91 is peeled off. The anti-soiling hand piece 90 is then presented in a manner covering the sheet food product 40. In this state, the sheet-like food 40 and the rice nugget 50 are caught by the presented dirty-hand prevention sheet 90, and the remaining outer film sheet 20b and inner film sheet 30b are pulled and removed, whereby the rice nugget 50 wrapped with the sheet-like food 40 can be obtained in a state of covering the dirty-hand prevention sheet 90. Since the sheet-like food 40 and the rice nugget 50 are covered with the dirty hand prevention sheet 90, they can be eaten without directly touching the hands, and are hygienic. The contamination-preventing hand sheet 90 may be peeled off in an easy-to-eat manner as appropriate during eating.

Fig. 6 is a diagram showing a process of breaking the inner membrane 30 at the inner breakable part 31. After the outer film 20 is cut into the

outer film pieces

20a and 20b as shown in fig. 6(a), the outer film piece 20a is pulled together with the inner film 30 in the direction of the arrow C substantially orthogonal to the

inner folds

32 and 33, and the inner joint 35 is peeled off from the inner film 30 by the pulling force as shown in fig. 6 (b). When the outer film sheet 20a and the inner film 30 are further pulled from this state, the folds (rib portions) of the

inner folds

32 and 33 in the inner tubular portion 36 and the middle tubular portion 30 are spread out and become substantially linear as shown in fig. 6 c.

When the outer membrane sheet 20a and the inner membrane 30 are further pulled in the arrow C direction from this state, the inner breakable part 37 of the inner membrane 30 is broken as shown in fig. 6 (d). Thereby, the inner membrane 30 is separated into the inner membrane sheet 30a and the inner membrane sheet 30b, and the state of fig. 5 is achieved.

As described above, the following effects are provided: the inner membrane 30 maintaining the airtight state can be separated into the inner membrane sheet 30a and the inner membrane sheet 30b only by pulling the inner membrane 30.

The above embodiments are for explaining the present invention, and should not be construed as limiting the invention described in the scope of claims or narrowing the scope. The configuration of each part of the present invention is not limited to the above-described embodiment, and various modifications can be made within the technical scope described in the claims.

In the above embodiment, the rice nuggets 50 packed by the packing sheet 10 are triangular rice balls, and the packing sheet 10 is packed so as to tightly wrap the rice nuggets 50. However, the rice nuggets 50 may be packaged by forming the packaging sheet 10 into a bag shape. In addition, a rod-shaped (cylindrical) rice block can be used as the rice block 50. In this case, the outer breakable portion 21 and the inner breakable portion 31 may be formed so as to cross the width direction of the packaging sheet 10, and these

breakable portions

21 and 31 may be disposed on the peripheral surface of the bar-shaped rice lump. The

breakable portions

21, 31 are preferably the center in the longitudinal direction of the bar-shaped rice nuggets, but may be positions biased toward either end edge. In the case of wrapping a rod-shaped rice lump, a tab may be formed on the wrapping sheet 10 to appropriately cover the end face of the rod-shaped rice lump.

The packaging sheet 10 of the present invention is not limited to the rice cake 50, and various foods such as a pancake, a fish-meat-and-sweet-potato cake, and the like can be packaged.

In the above embodiment, the inner breakable part 37 is formed between the inner second fold 33 and the inner joining part 35 facing the sheet-like food 40 as shown in fig. 3, but may be provided between the inner first fold 32 and the inner second fold 33, or even on the inner second fold 33 as shown in fig. 7 (a). In addition, in the case where the inner joining portion 35 joins the inner second fold portion 33 and the inner film 30, the inner breakable portion 37 may be formed between the inner first fold portion 32 facing the lump of rice 50 and the inner joining portion 35.

As shown in fig. 7(b), the outer breakable portion 21 may have the same configuration as the inner breakable portion 31. In the figure, reference numeral 22 denotes an outer first fold portion, 23 denotes an outer second fold portion, 24 denotes an outer breakable portion, and 25 denotes an outer joint portion.

The inner breakable part 37 may be formed not over the entire length of the inner film 30 but partially, for example, by forming a cut line at the approximate center of the inner film 30 where the bottom surface of the rice nugget 50 abuts.

In order to peel off the inner joint portion 35 and break the inner breakable portion 37 when the inner film 30 is pulled, it is desirable that a band-shaped reinforcing portion 38 is formed in the inner film 30 from an end edge parallel to the inner breakable portion 31 toward the inner breakable portion 31 as shown in fig. 8. The reinforcement 38 reinforces the inner film 30 by heat-sealing the inner film 30 or joining the films. Desirably, the reinforcement portion 38 is formed at a position corresponding to the bottom surface of the rice block 50. In the figure, two reinforcing

portions

38, 38 are formed so that the interval increases from the end edge of the inner film 30. By forming the reinforcing portion 38, when the inner film 30 is pulled, the inner film 30 is prevented from being stretched, and the inner joint portion 35 can be reliably peeled off and separated from the inner breakable portion 37.

Fig. 9 to 11 show a further different embodiment of a packaging sheet 10 of the present invention. As shown in the figure, the inner film 30 is provided with an inner first fold 32 on a side abutting against the rice block 50 (see fig. 11), and the inner first fold 32 is joined to the inner film 30 by an inner joint 35. The packaging sheet 10 having such a structure is characterized in that a cover sheet 80 covering the inner first fold 32 is joined to the inner film 30 in the embodiment. In fig. 9 to 11, the same reference numerals as those of the above-described embodiment denote the same components, and the description thereof is appropriately omitted.

As shown in fig. 9, the cover sheet 80 is a strip-shaped film extending along the inner first fold 32, and can be formed to have the same length as the longitudinal length of the inner film 30. The cover sheet 80 is joined 82 to the inner film 30 on the side of the inner first fold 32, and the free end side is covered by the inner first fold 32. The bonding 82 can be performed by, for example, wire sealing, thermal welding, adhesion, or the like.

In the case where the cover sheet 80 is not provided, since the rice block 50 has adhesiveness, when the inner sheet 30 is pulled to unfold the bend of the inner first fold portion 32, the bend is difficult to unfold smoothly due to contact resistance with the rice block 50, and thus, a crack may occur. In addition, when a portion of the inner joining portion 35 using a heat-sensitive adhesive is applied, for example, the adhesive may adhere to the rice block 50.

Therefore, in the present embodiment, by providing the cover sheet 80 covering the inner first fold 32 on the inner film 30, the inner first fold 32 is not in direct contact with the rice block 50 by the interposition of the cover sheet 80. The inner first fold portion 32 is in contact with the cover sheet 80 having a small contact resistance, and therefore, the fold can be smoothly unfolded. In addition, even when the adhesive is used for the inner joining portion 35, the adhesive does not adhere to the rice block 50 by the lid sheet 80.

Fig. 11 is a view showing a process of breaking the inner film 30 by the inner breakable portion 31 in the same manner as fig. 6, and is different from fig. 6 in that the cover sheet 80 is joined 82 so as to cover the inner first fold portion 32. After the outer film 20 is cut into the

outer film pieces

20a and 20b as shown in fig. 11(a), the outer film piece 20a is pulled together with the inner film 30 in the direction of the arrow C substantially orthogonal to the

inner folds

32 and 33, and the inner joint 35 is peeled off from the inner film 30 by the pulling force as shown in fig. 11 (b). At this time, the inner first fold 32 is positioned opposite the cover sheet 80, so that the slidability is good and the folding of the inner first fold 32 is smoothly spread. Thus, the inner first fold 32 is not broken. Even if the adhesive of the inner joining portion 35 adheres to the inner film 30, the adhesion to the rice block 50 can be prevented by the lid 80. When the outer membrane 20a and the inner membrane 30 are further pulled from this state, as shown in fig. 11 c, the folds (rib portions) of the

inner folds

32 and 33 in the inner tubular portion 36 and the middle tubular portion 30 are spread out and become substantially linear. When the outer membrane sheet 20a and the inner membrane 30 are further pulled in the arrow C direction from this state, the inner breakable part 37 of the inner membrane 30 is broken as shown in fig. 11 (d). Thereby, the inner membrane 30 is broken into an inner membrane sheet 30a and an inner membrane sheet 30 b.

According to the present embodiment, the folding of the

inner fold portions

32 and 33 can be more smoothly spread by inserting the cover sheet 80, and the inner film 30 can be cut by the inner breakable portion 37.

Description of the symbols

10 packaging sheet

20 outer film

21 outer breakable part

30 inner film

31 inner breakable part

32 inner first fold

33 inner second fold

34 overlap region

35 inner joint part

36 inner cylindrical part

37 inner breakable part

40 sheet-like food

50 rice block

60 package rice block

80 cover plate

90 hand-dirtying prevention tablets.

Claims

1. A packaging sheet for rice block is formed by integrally sandwiching sheet-like food between an outer film and an inner film provided so as to overlap with the outer film,

the outer membrane has an outer breakable portion that bisects the outer membrane,

the inner membrane has an inner breakable portion at a position substantially opposite the outer breakable portion,

the inner breakable portion has: an inner fold portion including an inner first fold portion and an inner second fold portion formed by a fold recess and a fold projection of the inner film in longitudinal section, an inner tubular portion formed by joining one of the inner first fold portion and the inner second fold portion of the inner fold portion or a vicinity thereof to the inner film facing thereto via an inner joining portion at an overlapping region sandwiched by the inner first fold portion and the inner second fold portion, and an inner breakable portion formed at the inner tubular portion and broken along the inner fold portion by pulling in a direction orthogonal to the inner fold portion,

the outer film and the inner film are welded at the outer periphery of the sheet-like food by a weld.

2. The wrapped sheet of rice nuggets of claim 1,

interposing a stain-resistant hand piece between the outer film and the sheet food product.

3. Packaging sheet according to claim 2,

the anti-soiling hand piece is easily peeled off and thermally welded to the outer film.

4. Packaging sheet according to any one of claims 1 to 3,

the inner breakable portion is an intermittent cut strip that cuts the inner film in the longitudinal direction and extends substantially parallel to the inner fold portion.

5. Packaging sheet according to any one of claims 1 to 4,

the inner breakable portion is a cut line formed substantially in parallel with the inner fold portion at substantially the center of the inner film in the longitudinal direction.

6. Packaging sheet according to any one of claims 1 to 5,

the inner joint is a portion that bonds the overlapping region to the inner film.

7. Packaging sheet according to any one of claims 1 to 6,

the inner film has a band-shaped reinforcing portion formed from substantially the center of an end edge parallel to the inner breakable portion toward the inner breakable portion, the reinforcing portion reinforcing the inner film.

8. Packaging sheet according to any one of claims 1 to 7,

the outside breakable portion has: the outer film includes an outer fold portion including an outer first fold portion and an outer second fold portion formed by a concave fold and a convex fold, an outer tubular portion formed by joining one or a vicinity of the outer first fold portion and the outer second fold portion of the outer fold portion to the outer film facing each other via an outer joining portion at an overlapping region sandwiched by the outer first fold portion and the outer second fold portion, and an outer breakable portion formed in the outer tubular portion and formed by breaking the outer tubular portion along the outer fold portion by pulling in a direction orthogonal to the outer fold portion.

9. Packaging sheet according to any one of claims 1 to 8,

the inner first fold portion is disposed on a side abutting against the rice piece, the inner joining portion is a portion joining the inner first fold portion to the inner film,

a band-shaped cover sheet is joined to the inner film along the inner first fold portion so as to cover the inner first fold portion.

10. A wrapped rice nugget which is wrapped with a wrapping sheet as claimed in any one of claims 1 to 9.