JP2018177266A - Packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging bag which includes an opening for filling contents at a bottom part.SOLUTION: A packaging bag includes a first side surface sheet, a second side surface sheet and a bottom surface sheet. The bottom surface sheet is disposed between the first side surface sheet and the second surface sheet in a state of being folded in a V-shape in a cross-sectional view, and a joint part is provided on a circumference. The V-shaped bottom surface sheet comprises a first bottom surface sheet opposing to the first side surface sheet and a second bottom surface sheet opposing to the second side surface sheet being connected to each other, and at the first bottom surface sheet, a joint region is provided which is joined to the first side surface sheet. In the region of the joint region, a through-hole is provided for penetrating the first side surface sheet and the first bottom surface sheet. In the second bottom surface sheet, an opening is provided which is not joined to the second side surface sheet and which opens the packaging bag.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a packaging bag having an opening at the bottom for filling the contents, and more specifically, the packaging bag is opened for contents such as seasoning liquid previously filled in the packaging bag. The present invention relates to a packaging bag suitable for applications in which food is added to the food and the contents and the food are cooked together with a microwave oven.

  In recent years, with the diversification of foods that can be cooked with microwaves, even packaging bags for containing the foods can be, for example, automatically openable packaging bags provided with steam removing means that can be cooked with microwaves, or by cooking In addition to a self-supporting packaging bag capable of maintaining a self-supporting state in the microwave so that the liquid in the contents does not fall, seasoning liquid etc. filled in the packaging bag in advance, the packaging bag is opened and food is further added Then, a packaging bag or the like equipped with a reclosable closure cookable with a reclosable closure (chuck) and the like has been developed, and the required functions are also diversified. With the diversification of the function of the packaging bag, it is desirable to provide openings at various positions of the packaging bag that can be filled with contents. For example, as a packaging bag which can be filled with the contents from the upper part, the plastic bag for microwave ovens provided with self-supporting property is known (for example, refer to patent documents 1). Moreover, as a bag which can be filled with the content from the side part, the packaging bag for microwave ovens provided with the steam removal means in the upper part is known (for example, refer patent document 2). Moreover, the pouch which equips the upper part with the fastener (fastener) is also disclosed as a bag which can be filled with the content from the side (for example, refer patent document 3).

  However, there is no packaging bag that can be filled with contents from the bottom, and development of a packaging bag that can be filled with contents from the bottom is desired.

Unexamined-Japanese-Patent No. 10-193518 Unexamined-Japanese-Patent No. 2017-13864 JP, 2014-111472, A

  Therefore, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a packaging bag having an opening at the bottom for filling the contents.

  The present invention has been made to achieve the above object, and the present invention according to claim 1 comprises a first side sheet, a second side sheet, and a bottom sheet, and the bottom sheet has a cross section. In the packaging bag which is disposed between the first side sheet and the second side sheet in a state of being folded in a V-shape, and in which the V-shaped bottom sheet is provided with the joint portion at the periphery, The first bottom sheet facing the side sheet and the second bottom sheet facing the second side sheet are continuous, and the first bottom sheet is provided with a joint area joined to the first side sheet, In the area of the joint area, a through hole penetrating the first side sheet and the first bottom sheet is provided, and the second bottom sheet is an opening that is not joined to the second side sheet and opens the inside of the packaging bag Packaging bag characterized by having A.

  According to a second aspect of the present invention, in the packaging bag according to the first aspect, the upper end side opposite to the bottom sheet is provided with a steam removing means.

  According to a third aspect of the present invention, in the packaging bag according to the first aspect, an openable / closable fastener comprising a male member and a female member engaged with each other is provided on the upper end side opposite to the bottom sheet. The male member comprises a strip-shaped first base and a male bite on one side of the first base, and the female member is a strip-shaped second base and a female occlusion on one side of the second base The first base is joined to either the first side sheet or the second side sheet, and the second base is the first side sheet or the side opposite to the first base It is joined to any other side of the second side sheet, and is continuous with the first base or the second base on the side of the bottom sheet of the first base or on the side of the bottom sheet of the second base And an easy peel portion, and the easy peel portion And the easy peel portion is joined to the other side of the first side sheet or the second side sheet on the side of the female member and on the side of the bottom sheet from the bite. When the easy peel portion is provided continuously to the second base, the easy peel portion is closer to the bottom sheet than the bite and the first side sheet or the second side sheet on the male member side It is characterized in that it is joined to one side.

  According to a fourth aspect of the present invention, in the packaging bag according to the third aspect, the joint portion of the easy peel portion joined to the first side sheet or the second side sheet is pointed toward the bite It is characterized in that it is a waveform of a shape.

  According to a fifth aspect of the present invention, in the packaging bag according to the third or fourth aspect, the occlusion tool comprises an unjoined portion not joined to the first side sheet or the second side sheet, Alternatively, the articulator comprises an unjoined portion which is not joined to the first side sheet and the second side sheet.

  The packaging bag of the present invention proposes a novel form characterized in that an opening for filling contents is provided at the bottom, and according to the invention described in claim 1, the first side sheet And a second side sheet, and a bottom sheet, the bottom sheet being disposed between the first side sheet and the second side sheet in a state of being folded in a V-shape in cross section, and joined to the periphery The V-shaped bottom sheet is formed by connecting the first bottom sheet facing the first side sheet and the second bottom sheet facing the second side sheet in series; One bottom sheet is provided with a joint area joined to the first side sheet, and a through hole passing through the first side sheet and the first bottom sheet is provided in the area of the joint area, the second bottom sheet Not joined with the second side sheet By providing an opening for opening the inside of the packaging bag, the first side sheet is obtained by suctioning the through hole portion provided in the bonding area from the outer surface of the first side sheet, for example, using one suction cup or the like. The first bottom sheet of the bottom sheet and the second bottom sheet of the bottom sheet can be simultaneously suctioned through the through holes, and the outer surface of the opposing second side sheet is suctioned by the other suction cup or the like, By separating the other suction cups from each other, the opening can be opened so that the contents can be filled by the automatic filling machine. Furthermore, after sealing the packaging bag, the bottom sheet spreads by the weight of the contents filled by turning the opening downward, so that the packaging bag can stand on its own, and the cooking by heating in the microwave oven Also the liquid of the contents does not spew.

  According to the second aspect of the present invention, since the contents can be filled from the bottom portion, the configuration in which the vapor removal means is provided on the upper end side opposite to the bottom sheet becomes possible, and the function of the vapor removal means It can be filled without damage.

  Also, according to the invention of claim 3, the contents can be filled from the bottom, and even if the bite is provided on the upper end side of the packaging bag, the bite is not opened or closed. At times, the contents are not caught in the bite, so it is hygienic and excellent in retort sterilization suitability.

  Furthermore, the first base or the second base is provided with an easy peel portion continuously on the side of the bottom sheet of the first base or the side of the bottom sheet of the second base, and the easy peel is When the base is continuously provided, the easy peel portion is joined to the other of the first side sheet or the second side sheet on the side of the bottom surface sheet with respect to the bite and on the side of the female member, When the easy peel portion is provided continuously to the second base, the first side sheet or the second side sheet on the side of the bottom sheet and the side of the male member with respect to the bite The contents are attached to the bite prior to opening by separating the contents and the bite from the bottom by the easy peel part by being joined to one side of the It is possible to prevent the door, do not be soiling their hands at the time of opening. Furthermore, since the contents do not adhere to the articulator, the appearance is excellent.

  In addition, since it is possible to stand on its own, it can be displayed at the store in an upright state. For this reason, the outer box for standing and displaying can be omitted. In addition, by making the upper end side up, the upper part of the packaging tool is cut open to free up the occlusion tool, and the easy peel part is peeled off, and the food is introduced from the formed opening. It is convenient for the purpose of mixing and cooking with the seasoning liquid already stored.

  According to the invention as set forth in claim 4, the joint portion of the easy peel portion joined to the first side sheet or the second side sheet has a corrugated shape which is pointed toward the bite, which is preferable. Easy peelability is obtained and opening becomes easier.

  According to the invention as set forth in claim 5, the occlusal member comprises an unjoined portion which is not joined to the first side sheet or the second side sheet, or the occlusal member comprises the first side sheet and the first side sheet. Since the unbonded portion is not joined to the two-sided sheet, the pressure in the packaging bag is increased by steam generated by heating the contents when the contents are cooked by reheating after opening the packaging bag. Also, the unjoined portion is de-steamed, so that the packaging bag can be ruptured or the detoning noise caused by the occlusion of the occlusion tool released can be avoided.

It is a front view showing a first embodiment of a packaging bag of the present invention. It is a rear view which shows 1st embodiment of the packaging bag of this invention. It is sectional drawing in the AA line of FIG. 1, (A) is an occlusion tool and (B) is an expanded sectional view explaining the structure of a 1st side sheet | seat. It is a rear view which shows 2nd embodiment of the packaging bag of this invention. It is sectional drawing for demonstrating the method to fill the content in the packaging bag of 1st embodiment. It is explanatory drawing for demonstrating the method to cook with the packaging bag of 1st embodiment, (a) is a figure which shows the state which separates an upper part and opens it, (b) shows the state which is throwing in foodstuffs. It is. It is a front view which shows an example of the conventional packaging bag. It is a front view which shows the other example of the conventional packaging bag.

The above-described present invention will be described in detail below using the drawings and the like.
FIG. 1 is a front view showing a first embodiment of the packaging bag of the present invention, FIG. 2 is a back view showing the first embodiment of the packaging bag of the present invention, and FIG. 3 is a cross-sectional view taken along line AA of FIG. (A) is an occlusion tool, (B) is an enlarged cross-sectional view for explaining the configuration of the first side sheet, FIG. 4 is a rear view showing a second embodiment of the packaging bag of the present invention, and FIG. FIG. 6 is an explanatory view for explaining a method of cooking with the packaging bag of the first embodiment, and FIG. Fig. 7 shows a state in which food is being fed, Fig. 7 is a front view showing an example of a conventional packaging bag, and Fig. 8 shows another example of the conventional packaging bag. 1A and 1B packaging bag in the figure, 1A ′ is an opened packaging bag, 10 is a first side sheet, 11 is a base layer, 12 is an intermediate layer, 13 is a front view Is a heat fusible resin layer, 20 is a second side sheet, 30 is a bottom sheet, 31 is a first bottom sheet, 32 is a second bottom sheet, 33 is a notch, 2 is a joint, 2t is an upper joint, 2l and 2r are side joints, 2b is a bottom joint, 3 is a joint area, 4 is a through hole, 5 is an opening, U is an upper end side, 40 is a vapor venting means, 41 is a protruding seal, and 42 is Unsealed part, 43: Divided part, 50: occlusion tool, 51: male member, 51a: first base, 51b: male occlusion, 52: female member, 52a: second base, 52b: female occlusion, 53 is an easy peel part, 53a is a joint part of an easy peel part, 54 is a non-joined part, 6 is a notch, 7 is a second opening, 8 is a cut piece, 9 is a food, 100, 200 is a conventional packaging bag It shows each.

  FIG. 1 is a front view showing a first embodiment of the packaging bag of the present invention, FIG. 2 is a rear view showing the first embodiment of the packaging bag of the present invention, and FIG. 3 is a line AA of FIG. (A) is an occlusion tool, (B) is a cross-sectional enlarged view explaining the structure of a 1st side sheet | seat. The packaging bag 1A according to the first embodiment of the present invention includes a first side sheet 10, a second side sheet 20, and a bottom sheet 30, as shown in FIGS. 1 to 3, and the bottom sheet 30 has a sectional view It is arranged in the lower part between the first side sheet 10 and the second side sheet 20 in a V-shaped folded state, is provided with a joint 2 at the periphery, and after filling the contents from the opening 5 and sealing, the bottom sheet It is a form of a self-supporting bag which can stand on its own when the bottom sheet 30 is spread by its own weight when placed with the bottom 30 down.

  The bottom sheet 30 is an inverted V-shape in which one sheet is folded in half and the folded portion is up, and the side facing the first side sheet 10 faces the first bottom sheet 31 and the second side sheet 20 The side is the second bottom sheet 32, and the first bottom sheet 31 and the second bottom sheet 32 are continuous. The first bottom sheet 31 is provided with a junction area 3 joined to the first side sheet 10 in a continuous manner with the wedge-shaped bottom junction 2b (2) as shown in FIG. 1 and FIG. The through-hole 4 which penetrates the 1st side sheet | seat 10 and the 1st bottom sheet 31 inside is provided. One or more through holes 4 are provided. The second bottom sheet 32 is provided with an opening 5 unjoined to the second side sheet 20 and opening the inside of the packaging bag 1A. The 2nd side sheet 20 and the 2nd bottom sheet 32 are joined in the shape of a triangle, and the both ends of the horizontal direction of opening 5 are united with side joined parts 21 and 2r. After filling the contents from the opening 5 by joining the second side sheet 20 and the second bottom sheet 32 in a triangular shape, the second side sheet 20 and the second bottom sheet 32 at the lower edge of the opening 5 are joined When the bottom sheet 30 is placed on the bottom, the self-supporting property is improved, which is preferable. Moreover, the notch 33 is provided in the left-right direction both ends of the bottom face sheet 30, and the 1st side sheet 10 and the 2nd side sheet 20 are directly joined to the said part. Providing the notches 33 is preferable because self-supporting property is improved.

  The packaging bag of the present invention is a packaging bag of a novel form characterized in that it has an opening 5 on the second bottom sheet 32 side where the second side sheet 20 and the second bottom sheet 32 are not joined. By providing the through hole 4 penetrating the first side sheet 10 and the first bottom sheet 31 in the area of the joint area 3 on the first bottom sheet 31 side of the sheet 30, the opening 5 can be opened, and the contents Can be easily filled.

As shown in FIGS. 1 to 3, the packaging bag 1 </ b> A includes an openable / closable fastener 50 composed of a male member 51 and a female member 52 engaged with each other on the upper end side U facing the bottom sheet 30. The occlusal tool 50 is convenient for use in which food is further added to the contents such as seasoning liquid filled in the packaging bag with a microwave as described later, and is a more preferable form. As shown in FIGS. 1 to 3, the strip-shaped engaging tool 50 in the left-right direction is provided along the upper bonding portion 2 t on the upper bonding portion 2 t side,
The male member 51 is provided with a strip-shaped first base portion 51a and a male engaging portion 51b on one side of the first base portion 51a, and the other side of the first base portion 51a is opposite to the second side with the male engaging portion 51b interposed therebetween. It is joined to the side sheet 20. The female member 52 is provided with a band-like second base 52a and a female engaging part 52b on one side of the second base 52a, and the other side of the second base 52a is opposite to the first side with the female engaging part 52b interposed therebetween. It is joined to the side sheet 10.

  Furthermore, as shown in FIG. 1 and FIG. 2, one end of the fastener 50 is provided with an unjoined portion 54 where the fastener 50 is not joined to the first side sheet 10 or the second side sheet 20, or The tool 50 includes an unjoined portion 54 not joined to the first side sheet 10 and the second side sheet 20. Specifically, an unbonded portion 54 not joined to the second side sheet 20 is provided at one end of the other side of the strip-shaped first base portion 51 a of the male member 51 or the strip-shaped second base portion of the female member 52 An unbonded portion 54 not joined to the first side sheet 10 is provided at one end of the other side of 52 a. Alternatively, the unjoined portion 54 is provided at one end of the other side of the first base 51 a and the second base 52 a. The unbonded portion 54 heats the contents of the packaging bag 1A or adds food and then heating for cooking in a microwave, the generated steam expands the inside of the packaging bag 1A, and the packaging bag When 1A bursts or the occlusion tool 50 is released, it is preferable to provide it since the generated vapor can be released from the unbonded portion 54 in order to avoid the generated explosion sound. The width of the unbonded portion 54 may be appropriately set in accordance with the contents in consideration of the steaming effect when cooking with the microwave oven. In addition, the occlusion tool 50 is not limited to FIG. 3, The 1st base 51a is joined to either one side of the 1st side sheet 10 or the 2nd side sheet 20, and the 2nd base 52a is a 1st base It is joined to the other side of either the first side sheet 10 or the second side sheet 20 opposite to 51a. Specifically, the male member 51 may be provided on the first side sheet 10 side, and the female member 52 may be provided on the second side sheet 20 side.

  In addition, an easy peel portion 53 is provided continuously under the occlusion tool 50. As shown in FIG. 3, an easy peel portion 53 is provided on the bottom sheet 30 side of the second base 52a of the female member 52 so as to be continuous with the second base 52a. The easy peel portion 53 is a resin film formed continuously to the second base 52 a and is joined to the side of the bottom sheet 30 from the fastener 50 and to the side of the second side sheet 20 to which the male member 51 is joined. It is done. The joint portion 53 a of the easy peel portion joined to the first side sheet 10 or the second side sheet 20 has a corrugated shape that is pointed toward the fastener 50. The shape of the joint portion 53a of the easy peel portion may be a straight line or a curved line, but it is preferable to use the above-mentioned waveform because a favorable easy peel property can be obtained and the opening becomes easier. By bonding the joint portion 53a of the easy peel portion to the second side sheet 20, for example, seasoning liquid filled below the easy peel portion 53 can be prevented from touching the male member 51 and the female member 52, as described later. . The easy peel portion 53 may be provided continuously to the first base 51 a on the bottom sheet 30 side of the first base 51 a of the male member 51 constituting the fastener 50 and joined to the first side sheet 10. That is, the first base 51a is joined to either the first side sheet 10 or the second side sheet 20, and the second base 52a is the first side sheet 10 or the second side opposite to the first base 51a. When it is joined to the other side of the sheet 20 and the easy peel portion 53 is provided continuously to the first base 51 a, the easy peel portion 53 is closer to the bottom sheet 30 than the connector 50 and the female member 52. When it is joined to the other side of the 1st side sheet 10 or the 2nd side sheet 20 by the joint part 53a of an easy-peel part and the easy-peel part 53 is continuously provided in the 2nd base 52a, an easy-peel part 53 is a side of the bottom sheet 30 with respect to the fastener 50, and a joint 53a of an easy peel on one side of the first side sheet 10 or the second side sheet 20 on the side of the male member 51 They are joined.

  The packaging bag 1A of the present invention is not limited to FIGS. 1 to 3, and the occlusion tool 50 having the easy peel portion 53 may be omitted. In addition, it is also possible to use an occlus which does not have the easy peel portion 53, and in this case also, the contents can be filled from the bottom, so that the occluss are not opened or closed. Because it is not hygienic.

  FIG. 3 is a cross-sectional view taken along the line A-A of FIG. 1, (A) is an occlusion tool, and (B) is an enlarged cross-sectional view for explaining the configuration of the first side sheet. The configuration of the packaging bag 1A of the present invention will be described with reference to FIG. As the first side sheet 10 of the packaging bag 1A, a laminated body in which a base material layer 11, an intermediate layer 12, and a thermally fusible resin layer 13 are laminated in order from the outside is used. Although not shown, the second side sheet 20 and the bottom sheet 30 also use the same laminate as the first side sheet 10. In the packaging bag 1A, the surfaces of the heat fusible resin layer 13 of the first side sheet 10 and the heat fusible resin layers of the second side sheet 20 and the bottom sheet 30 are opposed to each other and the bonding portion is performed by, for example, heat sealing the periphery. 2 (a top joint 2t, side joints 21 and 2r, and a bottom joint 2b) are formed.

  Since the base material layer 11 is a basic material constituting the packaging bag 1A, it can withstand the conditions such as formation and processing of the packaging bag 1A, and also has processability, heat resistance, slip resistance, pinhole resistance, water vapor Alternatively, it is preferable to be excellent in barrier properties to gas, printability, and other properties, and capable of maintaining them well without impairing the properties.

  As the base material layer 11 used in the present invention, a biaxially stretched film of polypropylene, polyethylene terephthalate, nylon or the like can be used. Alternatively, an inorganic material such as aluminum oxide, silicon oxide, indium oxide, tin oxide, or zirconium oxide may be vapor-deposited on the above film to form a vapor deposition layer. Usually, printing is often performed on the base material layer 11 and a printability is required, so a biaxially stretched film is preferable. The thickness of the film constituting the base material layer 11 may be a thickness that can be held to the minimum necessary for strength, rigidity and the like as a basic material, and may be determined in consideration of cost and the like. And usually about 9 to 50 μm.

  The intermediate layer 12 is provided when rigidity, light shielding property, gas barrier property and the like are required according to the packaging conditions, transport conditions and protective function conditions of contents, and the film used for the above-mentioned base material layer 11 can be used. . Moreover, what laminated | stacked and laminated | stacked 1 or more of these films etc. may be used. Also, the intermediate layer 12 can be omitted depending on the required quality.

  The heat fusible resin layer 13 may be any material as long as the heat fusible resin layers of the first side sheet 10, the second side sheet 20 and the bottom sheet 30 can be heat-fused to each other by heat, for example, Low density polyethylene, medium density polyethylene, high density polyethylene, linear (linear) low density polyethylene, ethylene / α-olefin copolymer polymerized using metallocene catalyst (single site catalyst), polypropylene, ethylene / acetic acid Vinyl copolymer, ionomer resin, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-propylene copolymer, methylpentene polymer, polyolefin such as polyethylene or polypropylene Resin such as acrylic acid, methacrylic acid, maleic anhydride, fumaric acid It one not selected from acid-modified polyolefin resin modified with unsaturated carboxylic acid may be used or two or more kinds. As a more preferable resin, linear low density polyethylene provided with retort sterilization aptitude and polypropylene can be mentioned. The thickness of the heat-fusible resin layer 13 is preferably about 20 μm to 150 μm, and more preferably about 40 μm to 100 μm, in consideration of heat sealability and the like.

  As a method of laminating the base material layer 11, the intermediate layer 12, and the heat fusible resin layer 13, for example, for a two-component curable dry laminate using a main agent such as polyester polyol and polyether polyol and an isocyanate-based curing agent A dry lamination method in which layers are laminated using an adhesive, or an extrusion lamination method in which polypropylene, a polyethylene resin, or the like is hot-melt extruded and laminated can be used. The dry lamination method is preferable in consideration of the retort aptitude. In addition, since the laminate including the base material layer 11, the intermediate layer 12 and the heat fusible resin layer 13 is not made of a material provided with a metal foil such as aluminum or a metal deposited film such as aluminum, it is heated by a microwave oven It is possible.

  A configuration example of a laminate used for the packaging bag 1A is as follows: a 12 μm thick biaxially stretched polyethylene terephthalate film (PET) for the base material layer 11 and a 15 μm thick biaxially stretched nylon film (ON) for the intermediate layer 12 , PET 12 μm / DL / ON 15 μm / DL / CPP 60 μm laminated by a dry lamination method using a 60 μm thick unstretched polypropylene film (CPP) for the heat fusible resin layer 13 and an adhesive for dry lamination (DL) The configuration can be mentioned. The above configuration is equipped with retort suitability and microwave suitability.

  The material of the fastener 50 is made of a resin having compatibility with the heat fusible resin layer 13 of the first side sheet 10 and the second side sheet 20 of the packaging bag 1A. As shown in FIG. 3, the occlusion tool 50 is composed of a male member 51 and a female member 52, and each male member 51 corresponds to the second side sheet 20 on one side (right side in FIG. 3) and the female member 52 to the other. It heat-seals to the 1st side sheet | seat 10 of the side (left side of FIG. 3). At this time, a heat shield plate (not shown) is interposed between the right male member 51 and the left female member 52 to prevent heat fusion between the male member 51 and the left female member 52. Then, the easy peel portion 53 integrally formed with the female member 52 is heat sealed to the inner surface (heat fusible resin layer) of the second side sheet 20 on the side where the male member 51 is heat sealed, and the easy peel portion The bonding portion 53a is formed.

  FIG. 4 is a rear view showing a second embodiment of the packaging bag of the present invention, and is a plan view seen from the side of the second side sheet 20. FIG. The packaging bag 1 </ b> B according to the second embodiment of the present invention is provided with the steam removing means 40 on the upper end side U facing the bottom sheet 30. The packaging bag 1A of the first embodiment is different from the packaging bag 1A of the first embodiment in that it is equipped with the vapor removal means 40 and not equipped with the bite tool 50, but the other respects are the same.

  The vapor removal means 40 is preferably provided at the upper central portion of the packaging bag 1B. In the example shown in FIG. 4, the vapor removal means 40 is provided so as to be connected to the inside of the upper joint 2 t and provided with a protruding seal portion 41 that protrudes from the inside of the upper joint 2 t to the bottom sheet 30 side. An unsealed portion 42 is provided in a region surrounded by the seal portion 41 and the upper joint portion 2t, and a dividing portion 43 is provided in the unsealed portion 42. The non-sealed portion 42 may be provided so as to extend from the protruding seal portion 41 to the upper joint 2 t. The dividing portion 43 is provided to penetrate the first side sheet 10 and the second side sheet 20 as shown in FIG. 4. The dividing portion 43 may be formed by, for example, a notch or a hole. By providing the dividing portion 43, when the cooking is performed using the microwave, the inside of the packaging bag is expanded by the steam generated in the packaging bag, and the pressurized steam seals the protruding seal portion 41 to the unsealed portion 42 side. When the retraction occurs and the seal retraction reaches the unsealed portion 42, the vapor generated in the packaging bag can be released to the outside through the dividing portion 43. Further, even if the upper end side U is provided with the vapor removal means 40, the contents can be filled from the opening 5 provided in the bottom, so the function of the vapor removal means 40 is not impaired. Preferably, the protruding seal portion 41 of the vapor removal means 40 has a corner. As shown in FIG. 4, it is preferable to provide the corner so as to face the center of the packaging bag 1B, and when cooking using a microwave oven, it is easy for the seal to recede from the top of the corner, further enhancing the steam releasing function. It can be made easy to demonstrate.

  FIG. 5 is a cross-sectional view for explaining a method of filling contents in the packaging bag 1A of the first embodiment. The method for filling the contents in the packaging bag 1A will be described with reference to FIG. The packaging bag 1A is supplied to the filling part with the bottom up, for example, by an automatic filling machine, both ends of the bottom are chucked, and one suction cup sucks the bonding area 3 from the outside of the first side sheet 10, Since the suction area sucks from the outside of the second side sheet 20 from the outside of the second side sheet 20 and pulls in the mutually opposite directions as shown by the arrows, through holes 4 are provided in the bonding area 3, so The two bottom sheet 32 is suctioned through the through hole 4, and the first side sheet 10 and the bottom sheet 30 are integrally suctioned by one of the suction cups, and the second side sheet 20 is sucked by the other suction cup Therefore, the opening 5 is opened, and the contents are sealed and packaged, for example, by filling contents (not shown) such as seasoning liquid, and heat sealing the edges of the second bottom sheet 32 and the second side sheet 20. Be done.

  In the sealed package, the easy peel portion 53 is releasably joined to the second side sheet 20 at the joint portion 53a of the easy peel portion, and the contents filled from the bottom portion and the engaging tool 50 are separated. ing. Therefore, the contents can be prevented from adhering to the occlusion tool 50 before opening, and the hands will not be soiled at the time of opening. Furthermore, since the contents do not adhere to the occlusion tool 50, the appearance is excellent.

  Thereafter, the package in which the content is filled in the packaging bag 1A is retort sterilized or boiled. In the packaging bag 1A, since the bottom sheet 30 is expanded by the weight of the contents filled when the bottom sheet 30 side is down, the packaging bag 1A can be made to stand on its own and displayed in the store in a stand-alone state. Can. For this reason, the outer box for standing and displaying can be omitted. Moreover, since it can heat-cook in the state which made it stand-alone in the refrigerator of a microwave oven, the liquid of the contents does not spray off.

  Next, with reference to FIG. 6, a method of cooking food using a package in which the contents are filled in the packaging bag 1A will be described. First, as shown in FIG. 6A, the packaging bag 1A is separated between the upper joint 2t and the engaging tool 50 from the notch 6 (see FIGS. 1 and 2), and the second opening is removed when the cut piece 8 is removed. 7 are formed. Then, the engagement between the male member 51 and the female member 52 of the fastener 50 is released from the second opening 7, and the fastener 50 is opened. By opening the articulator 50, the easy peel portion 53 continuously formed on the clasp 50 is pulled, and the joint portion 53a of the easy peel portion is from the second side sheet 20 (see FIG. 3)? Be At this time, since the bonding portion 53a of the easy peel portion is in a corrugated shape and peeled from the sharp side, peeling start is easy, and the easy peel portion 53 can be easily peeled from the second side sheet 20.

  And as shown to FIG. 6 (ro), the foodstuffs 9 of a required vegetable etc. are thrown into contents, such as a seasoning liquid in the opened packaging bag 1A '. Since the opened packaging bag 1A 'is self-supporting, the bottom sheet 30 is further expanded and the stability is increased when the food 9 is added. Thereafter, the bite fixture 50 is re-engaged, the food material 9 and the seasoning liquid are hand-gathered if necessary, and the food material 9 is made to conform to the seasoning liquid. This operation can be facilitated without causing the food material 9 and the seasoning liquid to fall by engaging the bite 50. Then, the opened packaging bag 1A 'is placed in the storage of the microwave oven in a standing state and heated for a predetermined time.

  During heating by the microwave oven, since the bite tool 50 is closed, the seasoning liquid of the contents and the food material 9 are heated, and the pressure in the opened packaging bag 1A 'rises. However, the fastener 50 is provided with the unjoined portion 54, and the vapor generated in the opened packaging bag 1A 'is discharged from the unjoined portion 54, and the inside of the opened packaging bag 1A' is constant. It can be held at pressure. Since the unjoined portion 54 is provided, even if the internal pressure of the opened packaging bag 1A 'rises as the seasoning liquid of the contents and the food material 9 are heated, the vapor is discharged, so it is ruptured from the fastener 50 The food can be cooked while preventing the contents from splattering into the microwave oven. When the cooking is completed, the food material 9 and the seasoning liquid are transferred from the opened packaging bag 1A 'to a plate or the like. In addition, after the necessary amount is taken out, the remaining amount can be resealed by the occlusion tool 50, which is convenient.

  In addition, since packaging bag 1A is a laminated structure which is not equipped with metal foil, such as aluminum, and metal vapor deposition, such as aluminum, it is equipped with microwave oven aptitude.

  Although an example of how to use the packaging bag 1A is shown, the content may be a cooked retort food such as hamburger, meatball, curry, stew. In this case, since the fastener is not required, the packaging bag 1B of the second embodiment is preferable. Alternatively, it may be a packaging bag not provided with the steam removing means 40 or the engaging tool 50, but in this case, a hole for steam discharge is formed in a part of the packaging bag. Or. Transfer the contents to a dish and reheat. Moreover, although the packaging bag provided with the occlusion tool 50 can also be used, the unjoined part 54 is unnecessary if it transfers to a plate and heats at the time of reheating.

  The packaging bag 1A, 1B of the present invention is provided with the opening 5 at the bottom, thereby providing the conventional packaging bag 100 having the opening shown in FIG. 7 at the side, and the opening at the side shown in FIG. It has an effect which the conventional packaging bag 200 does not have.

  Next, the effects of the packaging bags 1A and 1B of the present invention will be described more specifically. FIG. 7 shows a conventional microwaveable packaging bag 100 having an opening 5 on the side, which corresponds to Patent Document 3. As shown in FIG. The inside of the microwave oven is usually wide and the height is small compared to the width, and the height of the packaging bag is kept in a self-standing state due to the height standard. Usually, it is limited to 150 mm or less. Since the conventional packaging bag 100 is provided with the opening 5 in the height direction, there is a bottom provided with the stopper 50 at the top and the bottom sheet 30 at the bottom on receiving the height restriction, and the size of the opening 5 is small Therefore, the filling speed of the contents can not be increased because the opening 5 can not be widely opened. The packaging bag 1A of the present invention is provided with the opening 5 in the width direction, so the same height limitation is received as in the conventional packaging bag 100, but the width of the packaging bag 1A can be widened. Since the size can be increased, the opening 5 can be enlarged, the filling operation is easy, and the filling speed can be improved.

  FIG. 8 shows a conventional microwaveable packaging bag 200 having an opening 5 on the side, which corresponds to Patent Document 2. As shown in FIG. The conventional packaging bag 200 also suffers from the height limitation of the packaging bag due to the height standard of the microwave oven. Since the conventional packaging bag 200 is provided with the opening 5 in the height direction, the bottom of the packaging bag 200 is provided with the steam removing means 40 at the top and the bottom sheet 30 at the bottom. It has the same drawback as the conventional packaging bag 100 that the filling speed can not be increased because the opening 5 is smaller and the opening 5 can not be widened. On the other hand, since the packaging bag 1B of the present invention is provided with the opening 5 in the width direction, the height restriction is received as in the conventional packaging bag 200, but the width of the packaging bag 1B can be widened. Since the size of 5 can be increased, the opening 5 can be enlarged, the filling operation can be facilitated, and the filling speed can be improved.

  The embodiments described so far are two to three embodiments of the packaging bag according to the present invention, and the packaging bag according to the present invention is not limited to this, and the present invention All items within the scope of the present invention are included in the present invention.

1A, 1B Packaging bag 1A 'Opened packaging bag 10 1st side sheet 11 base material layer 12 middle layer 13 heat fusible resin layer 20 2nd side sheet 30 bottom sheet 31 first bottom sheet 32 second bottom sheet 33 Notch 2 Joint 2t Upper joint 2l, 2r Side joint 2b Bottom joint 3 Joint area 4 Through hole 5 Opening U Upper side 40 from the vapor extraction means 41 Protruding seal part 42 Unsealed part 43 Divided part 50 Occlusion Tool 51 Male member 51a First base 51b Male interlocking part 52 Female member 52a Second base 52b Female interlocking part 53 Easy peel part 53a Joint of easy peel part 54 Unbonded part 6 Notch 7 Second opening 8 Cut piece 9 Foodstuffs 100, 200 Conventional Packaging Bags

Claims (5)

A first side sheet,
A second side sheet,
And a bottom sheet,
The packaging bag is disposed between the first side sheet and the second side sheet in a state in which the bottom sheet is folded in a V-shaped cross-sectional view, and is provided with a joint at a peripheral edge,
In the V-shaped bottom sheet, a first bottom sheet facing the first side sheet and a second bottom sheet facing the second side sheet are continuous,
The first bottom sheet is provided with a joint region joined to the first side sheet, and the first side sheet and a through hole penetrating the first bottom sheet are provided in the region of the joint area,
A packaging bag characterized in that the second bottom sheet has an opening which is not joined to the second side sheet and which opens the inside of the packaging bag. 2. The packaging bag according to claim 1, further comprising steam removing means on an upper end side opposite to the bottom sheet. An openable / closable occlusion tool consisting of a male member and a female member which are engaged with each other is provided on the upper end side facing the bottom sheet,
The male member comprises a strip-shaped first base and a male bite on one side of the first base,
The female member comprises a band-like second base, and a female bite on one side of the second base,
The first base is joined to either the first side sheet or the second side sheet, and the second base is the first side sheet or the second side sheet opposite to the first base. Is joined to either side of the
The side of the bottom sheet of the first base or the side of the bottom sheet of the second base is provided with an easy peel portion continuously to the first base or the second base,
When the easy peel portion is continuously provided on the first base, the first side sheet or the second side sheet on the side of the bottom sheet and on the side of the female member with respect to the bite Joined to the other side of the
When the easy peel portion is provided continuously to the second base, the first side sheet or the second side sheet on the side of the bottom sheet and the side of the male member with respect to the bite The packaging bag according to claim 1, characterized in that it is joined to one side of. The packaging bag according to claim 3, wherein a junction of the easy peel portion joined to the first side sheet or the second side sheet has a corrugated shape which is pointed toward the engaging tool. The connector includes an unjoined portion not joined to the first side sheet or the second side sheet, or the connector includes an unjoined portion not connected to the first side sheet and the second side sheet The packaging bag according to claim 3 or 4 characterized by things.

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