JP7003472B2 - Packaging bag - Google Patents

Description

The present invention relates to a packaging bag having an opening at the bottom for filling the contents.

In recent years, with the diversification of foods that can be cooked, the functions required for packaging bags containing the foods are also diverse. With the diversification of the functions of the packaging bag, it is desired to provide the positions of the openings that can be filled with the contents at various positions of the packaging bag. For example, as a packaging bag that can be filled with contents from above, a self-supporting plastic bag for a microwave oven is known (see, for example, Patent Document 1). Further, as a bag capable of filling the contents from the side portion, a packaging bag for a microwave oven provided with a steam venting means at the upper portion is known (see, for example, Patent Document 2). Further, as a bag that can be filled with the contents from the side portion, a pouch having an occlusal tool (zipper) on the upper portion is also disclosed (see, for example, Patent Document 3).

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

Japanese Unexamined Patent Publication No. 10-193518 Japanese Unexamined Patent Publication No. 2017-13864 Japanese Unexamined Patent Publication No. 2014-11472

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

The present invention has been made in order to achieve the above object, and the present invention according to claim 1 has a first side surface sheet and a second side surface sheet arranged opposite to each other , and a folded portion folded up and down in half. It is provided with a bottom sheet arranged at the lower part between the first side surface sheet and the second side surface sheet in a state of facing up, and an upper joint portion is provided at the upper portion and a side joint portion is provided at the left and right side portions. The bottom sheet folded in half is a packaging bag in which a first bottom sheet facing the first side surface sheet and a second bottom sheet facing the second side surface sheet are continuous, and the bottom sheet is formed. The left and right side portions of the above are joined to the first side surface sheet and the second side surface sheet at the side joint portion, and the lower portion of the first bottom surface sheet is the bottom portion joined to the lower portion of the first side surface sheet. The second bottom sheet is provided with a joint portion, the second bottom sheet is provided with an opening that is not joined to the second side surface sheet and opens the inside of the packaging bag, and the bottom sheet is provided with the first bottom sheet and the second bottom sheet. A heat seal layer made of a thermoplastic resin that can be peeled off by heating is formed on the opposite outer surface, and the bottom sheet joint portion in which the outer surfaces of the first bottom surface sheet and the second bottom surface sheet are joined via the heat seal layer. It is a packaging bag characterized by being provided with.

The present invention according to claim 2 is characterized in that, in the packaging bag according to claim 1, the bottom sheet joint portion is located closer to the upper side than the lower end of the bottom sheet.

The present invention according to claim 3 is characterized in that, in the packaging bag according to claim 1 or 2, the steam venting means is provided on the upper end side facing the bottom sheet.

According to the fourth aspect of the present invention, in the packaging bag according to the first or second aspect, an openable and closable occlusal tool composed of a male member and a female member that mesh with each other is placed on the upper end side facing the bottom sheet. In preparation for the side, the male member has a band-shaped first base and a male occlusal portion on one side of the first base, and the female member has a band-shaped second base and one side of the second base. Is provided with a female occlusal portion, the first base portion is joined to either one side of the first side surface sheet or the second side surface sheet, and the second base portion is the first side opposite to the first base portion. The first base or the second is joined to the other side of either the side sheet or the second side sheet and is on the side of the bottom sheet of the first base or the side of the bottom sheet of the second base. When the base portion is continuously provided with the easy peel portion and the easy peel portion is continuously provided with the first base portion, the easy peel portion is provided on the side of the bottom sheet and the side of the female member from the occlusion tool. When the easy peel portion is continuously provided on the second base portion by being joined to the first side surface sheet or the other side of the second side surface sheet, the easy peel portion is provided on the side of the bottom sheet from the occlusion tool. Moreover, it is characterized in that it is joined to one side of the first side surface sheet or the second side surface sheet on the side of the male member.

According to the fifth aspect of the present invention, in the packaging bag according to the fourth aspect, the joint portion of the easy peel portion joined to the first side surface sheet or the second side surface sheet is sharpened toward the occlusion tool. It is characterized by having a corrugated shape.

The present invention according to claim 6 comprises an unjoined portion in the packaging bag according to claim 4 or 5, wherein the occlusion tool is not joined to the first side surface sheet or the second side surface sheet. Alternatively, the occlusal tool is characterized by including an unjoined portion that is not joined to the first side surface sheet and the second side surface sheet.

The packaging bag of the present invention proposes a novel form characterized in that the bottom is provided with an opening for filling the contents, and according to the invention of claim 1, the first side surface sheet. A second side surface sheet and a bottom surface sheet are provided, and the bottom surface sheet is arranged between the first side surface sheet and the second side surface sheet in a state of being folded in a V shape in a cross-sectional view, and is joined to the peripheral edge. In the packaging bag provided with the portion, the V-shaped bottom sheet is formed by continuously forming a first bottom sheet facing the first side surface sheet and a second bottom sheet facing the second side surface sheet. The lower part of the one bottom sheet is provided with a bottom joint portion joined to the lower part of the first side surface sheet, and the second bottom sheet is provided with an opening which is not joined to the second side surface sheet and opens the inside of the packaging bag. The bottom sheet is provided with a bottom sheet joint in which the outer surfaces of the first bottom sheet and the second bottom sheet are joined to each other so as to face the bottom sheet joint of the first side surface sheet. The first side surface sheet, the first bottom sheet of the bottom sheet, and the second bottom sheet joined at the bottom sheet joint can be sucked at the same time from the outer surface of the portion to be sucked, for example, by sucking with one suction cup or the like. The outer surface of the second side surface sheet is sucked by the other suction cup or the like, and the opening can be opened by separating one suction cup from the other suction cup, so that the contents are filled from the bottom by an automatic filling machine. be able to.

Furthermore, when the packaging bag filled with the contents is sterilized by heating, the bottom sheet joint is made removable so that the sealed opening is turned down and the bottom sheet is placed under the weight of the filled contents. The liquid level of the contents is lowered, so that the liquid of the contents does not spill even when cooked in the microwave oven.

According to the second aspect of the present invention, since the bottom sheet joint is located closer to the upper side than the lower end of the bottom sheet, the packaging bag filled with the contents before heat sterilization can be self-supporting.

According to the third aspect of the present invention, since the contents can be filled from the bottom portion, it is possible to configure a configuration in which the steam venting means is provided on the upper end side facing the bottom sheet, and the function of the steam venting means can be enhanced. Can be filled without damage.

Further, according to the invention of claim 4, the contents can be filled from the bottom, and even if the occlusal tool is provided on the upper end side of the packaging bag, the occlusal tool is not opened and closed. Since the contents are not sometimes caught in the occlusion tool, it is hygienic and has excellent retort sterilization suitability.

Further, the first base portion or the second base portion is continuously provided with an easy peel portion on the side of the bottom sheet of the first base portion or the bottom sheet side of the second base portion, and the easy peel portion is provided with the first base portion. When continuously provided on the base, the easy peel portion is joined to the first side surface sheet or the other side of the second side surface sheet on the side of the bottom sheet and on the side of the female member from the occlusion tool. When the easy peel portion is continuously provided on the second base portion, the first side surface sheet or the second side surface sheet on the side of the bottom sheet and the side of the male member from the occlusion tool. By making the structure joined to one side, it is possible to prevent the contents from adhering to the occlusal tool before opening because the contents filled from the bottom and the occlusal tool are separated by the easy peel portion. Does not get your hands dirty when opening. Furthermore, since the contents do not adhere to the occlusal tool, the appearance is excellent.

In addition, since it can stand on its own, it can be displayed in stores in an upright position. Therefore, it is possible to omit the outer box for displaying upright. In addition, by making it self-supporting, the upper part of the occlusal tool of the packaging bag is cut and opened with the upper end side facing upward, the occlusal part of the occlusal tool is released, the easy peel part is peeled off, and the ingredients are put in through the formed opening. However, it is convenient for cooking by mixing it with the seasoning liquid that has already been stored.

According to the fifth aspect of the present invention, the joint portion of the easy peel portion joined to the first side surface sheet or the second side surface sheet has a corrugated shape sharply toward the occlusal tool, which is good. Easy peeling is obtained and opening becomes easier.

According to the invention of claim 6, the occlusal tool includes the first side surface sheet or an unjoined portion which is not joined to the second side surface sheet, or the occlusal tool is the first side surface sheet and the first side surface sheet. Since it is provided with an unjoined portion that is not joined to the two side sheets, the pressure inside the packaging bag increases due to the steam generated by heating the contents when the contents are cooked by reheating after opening the packaging bag. However, the unjoined part is degassed, and the packaging bag bursts, or the occlusion of the occlusal tool is released, and the explosion sound emitted can be avoided.

It is a front view which shows the 1st Embodiment of the packaging bag of this invention. It is a back view which shows the 1st Embodiment of the packaging bag of this invention. FIG. 1 is a cross-sectional view taken along the line AA of FIG. 1, in which (a) is an occlusal tool and (b) is an enlarged cross-sectional view illustrating the configuration of a first side surface sheet. It is a back view which shows the 2nd Embodiment of the packaging bag of this invention. It is sectional drawing for demonstrating the method of filling the contents in the packaging bag of 1st Embodiment. It is explanatory drawing which shows the bottom of the self-supporting state after heat sterilizing the packaging bag of 1st Embodiment filled with contents. It is explanatory drawing for demonstrating the method of cooking with the packaging bag of 1st Embodiment, (a) is the figure which shows the state which the upper part is separated and opened, and (b) is the figure which shows the state which the food material is put in. 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 present invention described above will be described in detail below with reference to drawings and the like.
1 is a front view showing the 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 sectional view taken along the line AA of FIG. Yes, (a) is an occlusal tool, (b) is an enlarged cross-sectional view illustrating the configuration of the first side surface sheet, FIG. 4 is a rear view showing a second embodiment of the packaging bag of the present invention, and FIG. 5 is the first embodiment. A cross-sectional view for explaining a method of filling the contents into the packaging bag of the form, FIG. 6 is an explanatory view showing the bottom of the packaging bag of the first embodiment filled with the contents in a self-standing state after heat sterilization. , FIG. 7 is an explanatory diagram for explaining a method of cooking in the packaging bag of the first embodiment, (a) is a diagram showing a state in which the upper part is separated and opened, and (b) is a diagram showing a state in which ingredients are put. FIG. 8 is a front view showing an example of a conventional packaging bag, FIG. 9 is a front view showing another example of the conventional packaging bag, and 1A, 1B packaging bag, and 1A'in the figure are opened. 10 is the first side surface sheet, 11 is the base material layer, 12 is the intermediate layer, 13 is the heat-sealing resin layer, 20 is the second side surface sheet, 30 is the bottom sheet, and 31 is the first bottom sheet. , 32 is the second bottom sheet, 33 is the notch, 34 is the bottom sheet joint, 2 is the joint, 2t is the upper joint, 2l, 2r is the side joint, 2b is the bottom joint, and 3 is the opening. 4 is a notch, U is the upper end side, 40 is a steam venting means, 41 is a protruding seal portion, 42 is an unsealed portion, 43 is a divided portion, 50 is an occlusal tool, 51 is a male member, 51a is a first base portion, 51b is a male occlusal part, 52 is a female member, 52a is a second base part, 52b is a female occlusal part, 53 is an easy peel part, 53a is a joint part of an easy peel part, 54 is an unjoined part, and 5 is a second part. An opening, 6 is a cut piece, 7 is a content, 8 is a food material, and 100 and 200 are conventional packaging bags.

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 occlusal tool, and (b) is an enlarged cross-sectional view illustrating the configuration of the first side surface sheet. As shown in FIGS. 1 to 3, the packaging bag 1A of the first embodiment of the present invention includes a first side surface sheet 10, a second side surface sheet 20, and a bottom sheet 30, and the bottom surface sheet 30 is viewed in cross section. It is arranged in the lower part between the first side surface sheet 10 and the second side surface sheet 20 in a V-shaped folded state, has a joint portion 2 on the peripheral edge, and is filled with the content 7 (see FIG. 6) from the opening 3. It is a form of a self-standing bag that can stand on its own by expanding the bottom sheet 30 under the weight of the contents 7 when the bottom sheet 30 is placed face down after sealing.

The bottom sheet 30 is an inverted V-shape in which one sheet is folded in half and the folded portion faces up, and the side facing the first side surface sheet 10 faces the first bottom surface sheet 31 and the second side surface 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 lower part of the first bottom surface sheet 31 is provided with a bottom joint portion 2b joined to the lower part of the first side surface sheet 10, and the second bottom sheet 32 is not joined to the second side surface sheet 20 and the inside of the packaging bag 1A is opened. The opening 3 is provided. The outer surfaces of the first bottom sheet 31 and the second bottom sheet 32 facing each other are joined to the bottom sheet 30 at the bottom sheet joining portion 34. The bottom sheet joint portion 34 is preferably located closer to the lower ends of the first bottom sheet 31 and the second bottom sheet 32, that is, above the lower ends of the folded bottom sheet 30, and the packaging bag 1A is self-supporting. improves.

1 and 2 show an example in which the bottom sheet joint portion 34 is formed in a strip shape parallel to the lower end side of the packaging bag 1A, but the present invention is not particularly limited and may be partially provided or may be provided. , One or more spots may be formed. The packaging bag of the present invention is a packaging bag of a novel form, characterized in that a second side surface sheet 20 and an opening 3 in which the second bottom sheet 32 is not joined are provided on the side of the second bottom sheet 32, and the bottom surface thereof. By joining the first bottom sheet 31 and the second bottom sheet 32 of the sheet 30 at the bottom sheet joining portion 34, the opening of the opening 3 can be made and the contents can be easily filled. The shape of the bottom sheet joint portion 34 can be arbitrarily provided as long as it does not deviate from the above.

The bottom joint portion 2b (2) in which the lower portion of the first side surface sheet 10 and the lower portion of the first bottom surface sheet 31 are joined is formed in a boat shape as shown in FIGS. 1 and 3. On the other hand, in the opening 3 in which the second side surface sheet 20 and the second bottom surface sheet 32 are not joined, the second side surface sheet 20 and the second bottom surface sheet 32 have a triangular shape at both ends in the left-right direction as shown in FIG. It is joined and integrated with the side joints 2l and 2r. After filling the contents from the opening 3 by joining the second side surface sheet 20 and the second bottom surface sheet 32 in a triangular shape, the second side surface sheet 20 and the second bottom surface sheet 32 at the lower end edge of the opening 3 are joined. However, when the bottom sheet 30 is placed face down, the independence is improved, which is preferable. Further, notches 33 are provided at both ends of the bottom sheet 30 in the left-right direction, and the first side surface sheet 10 and the second side surface sheet 20 are directly joined to the portions. It is more preferable to provide the notch 33 because the independence is improved.

As shown in FIGS. 1 to 3, the packaging bag 1A includes an openable and closable occlusal tool 50 composed of a male member 51 and a female member 52 that are mutually occluded with the upper end side U facing the bottom sheet 30. As will be described later, the occlusal tool 50 is convenient for cooking by adding further ingredients to the contents such as a seasoning liquid filled in the packaging bag with a microwave oven, and is a more preferable form. As shown in FIGS. 1 to 3, the band-shaped occlusal tool 50 is provided along the upper joint portion 2t on the upper joint portion 2t side in the left-right direction, and the male member 51 includes the band-shaped first base portion 51a and the first base portion 51a. A male occlusal portion 51b is provided on one side of the one base portion 51a, and both sides of the first base portion 51a sandwiching the male occlusal portion 51b are joined to the second side surface sheet 20. The female member 52 is provided with a band-shaped second base portion 52a and a female occlusal portion 52b on one side of the second base portion 52a, and the other side of the second base portion 52a has first side surfaces on both sides sandwiching the female occlusal portion 52b. It is joined to the sheet 10.

Further, as shown in FIGS. 1 and 2, one end of the occlusal tool 50 is provided with an unjoined portion 54 in which the occlusal tool 50 is not joined to the first side surface sheet 10 or the second side surface sheet 20, or is occluded. The tool 50 includes an unjoined portion 54 in which the tool 50 is not joined to the first side surface sheet 10 and the second side surface sheet 20. Specifically, an unjoined portion 54 that is not joined to the second side surface sheet 20 is provided at one end of the other side of the strip-shaped first base portion 51a of the male member 51, or the strip-shaped second base portion of the female member 52 is provided. An unjoined portion 54 that is not joined to the first side surface sheet 10 is provided at one end of the other side of the 52a. Alternatively, the unjoined portion 54 is provided at one end on the other side of the first base portion 51a and the second base portion 52a. When the contents of the packaging bag 1A are heated or the unbonded portion 54 is heated for cooking in a microwave oven after further adding ingredients, the inside of the packaging bag 1A expands due to the generated steam, and the packaging bag 1A is expanded. It is preferable to provide it because it is for avoiding the explosive sound emitted when 1A bursts or the occlusion of the occlusal tool 50 is released, and the generated steam can be released from the unjoined portion 54. The width of the unjoined portion 54 may be appropriately set according to the contents in consideration of the degree of steam escape when cooking in a microwave oven. The occlusal tool 50 is not limited to FIG. 3, and the first base portion 51a is joined to either side of the first side surface sheet 10 or the second side surface sheet 20, and the second base portion 52a is the first base portion. It is joined to either the first side surface sheet 10 or the second side surface sheet 20 on the opposite side of the 51a to the other side. Specifically, the male member 51 may be provided on the first side surface sheet 10 side, and the female member 52 may be provided on the second side surface sheet 20 side.

Further, an easy peel portion 53 is continuously provided under the occlusal tool 50. In FIG. 3, an easy peel portion 53 is provided continuously on the second base portion 52a on the side of the bottom surface sheet 30 of the second base portion 52a of the female member 52. The easy peel portion 53 is a resin film continuously formed on the second base portion 52a, and is easy on the side of the bottom sheet 30 and the side of the second side surface sheet 20 to which the male member 51 is joined from the occlusal tool 50. It is joined at the joint portion 53a of the peel portion. The joint portion 53a of the easy peel portion joined to the first side surface sheet 10 or the second side surface sheet 20 has a corrugated shape sharpened toward the occlusal tool 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 waveform because good easy peel properties can be obtained and opening becomes easier. By joining the joint portion 53a of the easy peel portion to the second side surface sheet 20, for example, the seasoning liquid filled below the easy peel portion 53 can be prevented from touching the male member 51 and the female member 52. .. The easy peel portion 53 may be continuously provided on the bottom surface sheet 30 side of the first base portion 51a of the male member 51 constituting the occlusal tool 50 and joined to the first side surface sheet 10. That is, the first base portion 51a is joined to either side of the first side surface sheet 10 or the second side surface sheet 20, and the second base portion 52a is the first side surface sheet 10 or the second side surface opposite to the first base portion 51a. When the easy peel portion 53 is continuously provided on the first base portion 51a because it is joined to any other side of the sheet 20, the easy peel portion 53 is provided on the side of the bottom sheet 30 from the occlusal tool 50 and the female member 52. When the easy peel portion 53 is continuously provided on the second base portion 52a by being joined to the other side of the first side surface sheet 10 or the second side surface sheet 20 by the joint portion 53a of the easy peel portion, the easy peel portion. 53 is joined to one side of the first side surface sheet 10 or the second side surface sheet 20 on the side of the bottom sheet 30 and the side of the male member 51 from the occlusal tool 50 by the joint portion 53a of the easy peel portion.

The packaging bag 1A of the present invention is not limited to FIGS. 1 to 3, and the occlusal tool 50 provided with the easy peel portion 53 may be omitted. Further, it is also possible to use an occlusal tool that does not have the easy peel portion 53, and in this case as well, since the contents can be filled from the bottom, the occlusal tool does not open and close, so that the contents may be caught in the occlusal tool at the time of filling. It is hygienic because it is not.

3A and 3B are cross-sectional views taken along the line AA of FIG. 1, where FIG. 3A is an enlarged cross-sectional view illustrating the configuration of an occlusal tool and FIG. 3B is a first side surface sheet. The configuration of the packaging bag 1A of the present invention will be described with reference to FIG. 3 (b). As the first side surface sheet 10 of the packaging bag 1A, a laminated body in which a base material layer 11, an intermediate layer 12, and a heat-sealing resin layer 13 are laminated is used in this order from the outside. Although not shown, the second side surface sheet 20 and the bottom surface sheet 30 also use the same laminated body as the first side surface sheet 10. The packaging bag 1A has a joint portion by, for example, heat-sealing the peripheral edge of the first side surface sheet 10 with the heat-sealing resin layer 13 facing each other with the surfaces of the second side surface sheet 20 and the bottom sheet 30 facing each other. 2 (upper joint portion 2t, side joint portion 2l, 2r, bottom joint portion 2b) is formed.

Since the base material layer 11 is a basic material constituting the packaging bag 1A, it can withstand conditions such as formation and processing of the packaging bag 1A, and has processing workability, heat resistance, slipperiness, pinhole resistance, and water vapor resistance. Alternatively, it is preferable that the material has excellent barrier properties against gas, printability, and other properties, and can hold them well without impairing the properties.

As the base material layer 11 used in the present invention, a biaxially stretched film such as polypropylene, polyethylene terephthalate, polybutylene terephthalate, nylon or the like can be used. Alternatively, a film obtained by depositing an inorganic substance such as aluminum oxide, silicon oxide, indium oxide, tin oxide, and zirconium oxide on the above film and providing a vapor deposition layer can be used. Usually, the base material layer 11 is often printed, and printability is required. Therefore, a biaxially stretched film is preferable. The thickness of the film constituting the base material layer 11 may be a thickness that can be maintained at the minimum necessary for strength, rigidity, etc. as a basic material, and may be determined in consideration of cost, etc. Usually, it is about 9 to 50 μm.

The intermediate layer 12 is provided when rigidity, light shielding property, gas barrier property, etc. are required by packaging conditions, transportation conditions, and protective function conditions of the contents, and the film used for the base material layer 11 can be used. .. Further, one or more of these films may be combined and laminated. Further, the intermediate layer 12 may be omitted depending on the required quality.

The heat-sealing resin layer 13 may be any heat-sealing resin layer of the first side surface sheet 10, the second side surface sheet 20, and the bottom sheet 30 as long as it can be heat-sealed to each other, 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 Polyformates such as vinyl copolymers, ionomer resins, ethylene-ethyl acrylate copolymers, ethylene-acrylic acid copolymers, ethylene-methacrylic acid copolymers, ethylene-propylene copolymers, methylpentene polymers, polyethylene or polypropylene One or more selected from acid-modified polyolefin-based resins obtained by modifying the based resin with an unsaturated carboxylic acid such as acrylic acid, methacrylic acid, maleic anhydride, and fumaric acid can be used. More preferable resins include linear low-density polyethylene and polypropylene having retort sterilization suitability. The thickness of the heat-sealing resin layer 13 is preferably about 20 μm to 150 μm, more preferably about 40 μm to 100 μm, in consideration of heat-sealing properties and the like.

As a method of laminating the base material layer 11, the intermediate layer 12, and the heat-sealing resin layer 13, for example, for a two-component curing type dry laminating using a main agent such as a polyester polyol or a polyether polyol and an isocyanate-based curing agent. A dry lamination method of laminating using an adhesive or an extruded laminating method of hot melt extruding polypropylene, polyethylene resin or the like and laminating can be used. Considering the retort suitability, the dry lamination method is preferable. Further, since the laminated body composed of the base material layer 11, the intermediate layer 12, and the heat-sealing resin layer 13 does not use a material having a metal foil such as aluminum or a metal vapor deposition film layer such as aluminum, it is heated in a microwave oven. It is possible.

To show a configuration example of the laminate used for the packaging bag 1A, a biaxially stretched polypropylene terephthalate film (PET) having a thickness of 12 μm is deposited on the base material layer 11, and an inorganic substance such as aluminum oxide or silicon oxide is deposited on the intermediate layer 12. A dry laminating adhesive (DL) using a 12 μm thick biaxially stretched polyethylene terephthalate (VMPET) having a formed vapor deposition layer and a 60 μm thick unstretched polypropylene film (CPP) on a heat-sealing resin layer 13. PET 12 μm / DL / VMPET 12 μm / DL / CPP 60 μm laminated by the dry laminating method using PET 12 μm / DL laminated by the dry laminating method using an unstretched polypropylene film (CPP) with a thickness of 60 μm on the axially stretched nylon film (ON) and the heat-sealing resin layer 13 and a dry laminating adhesive (DL). A configuration of / ON15 μm / DL / CPP60 μm can be mentioned. The above configuration has retort suitability and microwave oven suitability.

The material of the occlusal tool 50 is made of a resin having compatibility with the heat-sealing resin layer 13 of the first side surface sheet 10 and the second side surface sheet 20 of the packaging bag 1A. As shown in FIG. 3, the occlusal tool 50 is composed of a male member 51 and a female member 52, each male member 51 is on the second side surface sheet 20 on one side (right side in FIG. 3), and the female member 52 is on the other side. The first side surface sheet 10 on the side (left side in FIG. 3) is heat-sealed. At this time, by interposing a heat shield plate (not shown) between the male member 51 on the right side and the female member 52 on the left side, heat fusion between the male member 51 and the female member 52 on the left side is prevented. Then, the easy peel portion 53 integrally formed with the female member 52 is heat-sealed to the inner surface (heat-sealing resin layer) of the second side surface sheet 20 on the side where the male member 51 is heat-sealed, and the easy peel portion is formed. The joint 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 surface sheet 20. The packaging bag 1B according to the second embodiment of the present invention is provided with the steam venting 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 in that it is provided with the steam venting means 40 and is not provided with the occlusal tool 50, but is the same except for the above.

The steam venting means 40 is preferably provided in the upper center of the packaging bag 1B. In the example shown in FIG. 4, the steam venting means 40 is provided in connection with the inside of the upper joint portion 2t, and a protruding seal portion 41 protruding from the inside of the upper joint portion 2t toward the bottom sheet 30 is provided and protrudes. The unsealed portion 42 is provided in the area surrounded by the sealed portion 41 and the upper joint portion 2t, and the divided portion 43 is provided in the unsealed portion 42. The unsealed portion 42 may be provided so as to extend from the protruding seal portion 41 to the upper joint portion 2t. The dividing portion 43 is provided so as to penetrate the first side surface sheet 10 and the second side surface sheet 20 as shown in FIG. The dividing portion 43 may be formed, for example, by a notch or a hole. By providing the dividing portion 43, when cooking is performed using a microwave oven, the inside of the packaging bag expands due to the steam generated in the packaging bag, and the pressure steam seals the protruding seal portion 41 to the unsealed portion 42 side. When the retreat occurs and the retreat of the seal reaches the unsealed portion 42, the steam generated in the packaging bag can be released to the outside through the dividing portion 43. Further, even if the steam venting means 40 is provided on the upper end side U, the contents can be filled from the opening 3 provided in the bottom portion, so that the function of the steam venting means 40 is not impaired. The protruding seal portion 41 of the steam venting means 40 preferably has a corner portion. As shown in FIG. 4, it is preferable to provide the corner portion so as to face the center of the packaging bag 1B, and when cooking using a microwave oven, the seal easily recedes from the apex of the corner portion, and the steam venting function is further enhanced. It can be made easier to exert.

FIG. 5 is a cross-sectional view for explaining a method of filling the packaging bag 1A of the first embodiment with the contents. A method of filling the packaging bag 1A with the contents will be described with reference to FIG. The packaging bag 1A is supplied to the filling portion with the bottom facing up by, for example, an automatic filling machine, both ends of the bottom are chucked, and one suction cup sucks the vicinity of the bottom sheet joint portion 34 from the outside of the first side surface sheet 10. Then, when the vicinity of the bottom sheet joint portion 34 facing the bottom sheet joint portion 34 is sucked from the outside of the second side surface sheet 20 with the other suction cup and pulled in opposite directions on the outside as shown by the arrows, the first bottom surface sheet 31 of the bottom sheet 30 is formed. Since the second bottom sheet 32 is joined by the bottom sheet joint portion 34, the first side surface sheet 10 and the bottom sheet 30 are integrally sucked by one suction cup, and the second side sheet 20 is sucked by the other suction cup. Therefore, the opening 3 is opened, for example, the content 7 (see FIG. 6) such as a seasoning liquid is filled, and the lower end edges of the second bottom sheet 32 and the second side surface sheet 20 are heat-sealed. The contents 7 are hermetically packaged.

In the sealed package, the easy peel portion 53 is detachably joined to the second side surface sheet 20 at the joint portion 53a of the easy peel portion, and the contents 7 filled from the bottom and the occlusal tool 50 are separated. Has been done. Therefore, it is possible to prevent the contents 7 from adhering to the occlusal tool 50 before opening, and the hands are not soiled at the time of opening. Further, since the content 7 does not adhere to the occlusal tool 50, the appearance is excellent.

After that, the package in which the content 7 is filled in the packaging bag 1A is sterilized by retort pouch or boiled. FIG. 6 shows the state of the packaging bag after heat sterilization by retort sterilization or boil sterilization. Although the state of the bottom portion is shown in FIG. 6, it is preferable that the bottom surface sheet joint portion 34 is peeled off by heat sterilization, the first bottom surface sheet 31 and the second bottom surface sheet 32 are separated, and the bottom surface sheet 30 is further expanded and packaged. As for the bag 1A, the bottom sheet 30 expands due to the weight of the filled contents 7 by turning the bottom sheet 30 side down, so that the packaging bag 1A can stand on its own and can be displayed in the store in a stand-alone state. Can be done. Therefore, it is possible to omit the outer box for displaying upright. In addition, the food can be cooked independently in the microwave oven, and the liquid level of the content 7 is lowered, so that the liquid of the content 7 does not spill out.

A thermoplastic resin that can be thermally fused is used as the bottom sheet joint portion 34, and a thermoplastic resin that is easily peeled off by heat sterilization is more preferable. Preferred resins include, for example, ethylene-vinyl acetate copolymer (EVA) -based, vinyl chloride-vinyl acetate copolymer-based, acrylic-based, chlorinated polyolefin-based, rubber-based, polyamide-based, styrene-based, urethane-based, and polyester-based resins. Etc. can be used alone or as a mixture of one or more kinds. Particularly, EVA-based resin, a mixture of EVA and chlorinated polypropylene, and acrylic resin are preferable. Alternatively, the bottom sheet 30 is provided with an undercoat layer using a water-soluble resin such as polyvinyl alcohol or shellac, and a thermoplastic resin layer is provided on the undercoat layer using the thermoplastic resin. You can also do it. In this case, the undercoat layer is melted or softened by the hot water during heat sterilization, so that the first bottom surface sheet 31 and the second bottom surface sheet 32 are peeled off. The thermoplastic resin can be formed as a heat seal layer at a predetermined position on the bottom sheet 30 by, for example, a gravure printing method or the like as a heat sealant, and the bottom sheet joint portion 34 can be formed by heat seal. Further, it is preferable to provide the heat seal layer at a position where the bottom sheet 30 of each of the first bottom sheet 31 and the second bottom sheet 32 is folded in half.

Next, with reference to FIG. 7, a method of cooking the food material by using a package in which the contents 7 are filled in the packaging bag 1A will be described. First, as shown in FIG. 7 (a), the packaging bag 1A is separated from the notch 4 (see FIGS. 1 and 2) between the upper joint portion 2t and the occlusal tool 50, and when the cut piece 6 is removed, the second opening portion is formed. 5 is formed. Then, the male member 51 and the female member 52 of the occlusal tool 50 are released from the occlusal through the second opening 5, and the occlusal tool 50 is opened. By opening the occlusal tool 50, the easy peel portion 53 continuously formed on the occlusal tool 50 is pulled, and the joint portion 53a of the easy peel portion is peeled off from the second side surface sheet 20 (see FIG. 3). At this time, the joint portion 53a of the easy peel portion has a corrugated shape and is easily peeled off from the sharp side, so that the easy peel portion 53 can be easily peeled off from the second side surface sheet 20.

Then, as shown in FIG. 7 (b), the necessary foodstuff 8 such as vegetables is put into the content 7 such as the seasoning liquid in the opened packaging bag 1A'. Since the opened packaging bag 1A'is self-supporting, when the food material 8 is added, the bottom sheet 30 is further expanded and the stability is increased. After that, the occlusal tool 50 is occluded again, and if necessary, the food material 8 and the seasoning liquid are kneaded by hand so that the food material 8 is blended with the seasoning liquid. By engaging the occlusal tool 50, the food material 8 and the seasoning liquid do not spill, and this operation can be easily performed. Then, the opened packaging bag 1A'is placed in a microwave oven in an upright state and heated for a certain period of time.

Since the occlusal tool 50 is closed during heating in the microwave oven, the pressure inside the opened packaging bag 1A'is increased by heating the seasoning liquid of the content 7 and the food material 8. However, the occlusal tool 50 is provided with the unjoined portion 54, and the steam 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. Can be held in pressure. Since the unjoined portion 54 is provided, steam is discharged even if the internal pressure of the opened packaging bag 1A'is increased as the seasoning liquid of the content 7 and the food material 8 are heated, so that the occlusal tool 50 is provided. It can be cooked while preventing it from bursting and scattering the contents into the microwave oven. When the cooking is completed, the ingredients 8 and the seasoning liquid are transferred from the opened packaging bag 1A'to a plate or the like. After taking out the required amount, the remaining amount can be resealed with the occlusion tool 50, which is convenient.

Since the packaging bag 1A has a laminated structure that does not include metal foil such as aluminum or metal vapor deposition such as aluminum, it is suitable for a microwave oven.

Although an example of how to use the packaging bag 1A is shown, the content 7 may be a cooked retort food such as a hamburger steak, a meatball, a curry, or a stew. In this case, since the occlusion tool is not required, the packaging bag 1B of the second embodiment is preferable. Alternatively, a packaging bag not provided with the steam venting means 40 or the occlusal tool 50 may be used, but in this case, a hole for steam discharge is formed in a part of the packaging bag. or. Transfer the contents to a plate and reheat. A packaging bag provided with the occlusal tool 50 can also be used, but the unjoined portion 54 is unnecessary if the bag is transferred to a plate and heated at the time of reheating.

The packaging bags 1A and 1B of the present invention are provided with the conventional packaging bag 100 having the opening shown in FIG. 8 on the side and the opening on the side shown in FIG. 9 by providing the opening 3 at the bottom. It has an effect not found in the conventional packaging bag 200.

Next, the effects of the packaging bags 1A and 1B of the present invention will be described more specifically. FIG. 8 is a conventional packaging bag 100 that can be microwaved and has an opening 3 on the side, and is a packaging bag corresponding to Patent Document 3. The inside of a microwave oven is usually wide and the height is smaller than the width, and because of the height standard, when the packaging bag is stored in a self-standing state, the height of the packaging bag is constant ( Normally, it is limited to 150 mm or less) or less. Since the conventional packaging bag 100 is provided with an opening 3 in the height direction, the opening 3 is limited in height and has a bottom having an occlusal tool 50 at the top and a bottom sheet 30 at the bottom, and the size of the opening 3 is small. Therefore, it has a drawback that the filling speed of the contents cannot be increased because the opening 3 cannot be opened widely. Since the packaging bag 1A of the present invention has an opening 3 in the width direction, the height is limited like the conventional packaging bag 100, but the width of the packaging bag 1A can be widened, and the dimensions of the opening 3 can be increased. Since it can be made large, the opening 3 can be widened, the filling work can be facilitated, and the filling speed can be improved.

FIG. 9 is a conventional packaging bag 200 that can be microwaved and has an opening 3 on the side, and is a packaging bag corresponding to Patent Document 2. Due to the height standard inside the microwave oven, the conventional packaging bag 200 is also subject to the height limitation of the packaging bag. Since the conventional packaging bag 200 is provided with an opening 3 in the height direction, it is subject to height restrictions and has a bottom having a steam venting means 40 at the top and a bottom sheet 30 at the bottom, and the dimensions of the opening 3 are large. It has the same drawbacks as the conventional packaging bag 100 that the filling speed cannot be increased because the size is small and the opening 3 cannot be widened. On the other hand, since the packaging bag 1B of the present invention has an opening 3 in the width direction, the height is limited like the conventional packaging bag 200, but the width of the packaging bag 1B can be widened, and the opening can be widened. Since the size of 3 can be increased, the opening 3 can be widened, the filling work can be facilitated, and the filling speed can be improved.

The embodiments described so far are the same as those of 2 to 3 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 is not limited thereto. Anything that does not deviate from the gist of the present invention is included in the present invention.

1A, 1B Packaging bag 1A'Opened packaging bag 10 First side sheet 11 Base material layer 12 Intermediate layer 13 Heat-sealing resin layer 20 Second side sheet 30 Bottom sheet 31 First bottom sheet 32 Second bottom sheet 33 Notch 34 Bottom sheet joint 2 Joint 2t Top joint 2l, 2r Side joint 2b Bottom joint 3 Opening 4 Notch U Upper end side 40 Steam venting means 41 Protruding seal 42 Unsealed 43 Divided 50 Biting tool 51 Male member 51a First base 51b Male occlusal 52 Female member 52a Second base 52b Female occlusal 53 Easy peel 53a Easy peel joint 54 Unjoined 5 Second opening 6 Cut piece 7 Contents 8 Ingredients 100, 200 Conventional packaging bag

Claims (6)

The first side surface sheet and the second side surface sheet arranged to face each other, and the bottom surface arranged at the lower part between the first side surface sheet and the second side surface sheet with the folded portion turned up and down. With a seat,
A packaging bag with an upper joint on the top and side joints on the left and right sides .
The bottom sheet folded in half consists of a first bottom sheet facing the first side surface sheet and a second bottom sheet facing the second side surface sheet.
The left and right sides of the bottom sheet are joined to the first side surface sheet and the second side surface sheet at the side joints.
The lower part of the first bottom surface sheet is provided with a bottom joint portion joined to the lower part of the first side surface sheet.
The second bottom sheet is provided with an opening that is not joined to the second side sheet and opens the inside of the packaging bag.
A heat seal layer made of a thermoplastic resin that can be peeled off by heating is formed on the outer surface of the bottom sheet facing the first bottom sheet and the second bottom sheet, and the first bottom sheet is formed through the heat seal layer. A packaging bag comprising a bottom sheet joint portion to which the outer surfaces of the second bottom sheet are joined to each other. The packaging bag according to claim 1, wherein the bottom sheet joint is located closer to the upper side than the lower end of the bottom sheet. The packaging bag according to claim 1 or 2, wherein the steam venting means is provided on the upper end side facing the bottom sheet. An openable and closable occlusal tool consisting of a male member and a female member that occlude with each other is provided on the upper end side facing the bottom sheet.
The male member has a band-shaped first base and a male occlusal portion on one side of the first base.
The female member has a band-shaped second base and a female occlusal portion on one side of the second base.
The first base is joined to either side of 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. It is joined to either side of
An easy peel portion is provided continuously on the first base portion or the second base portion on the side of the bottom sheet of the first base or the side of the bottom sheet of the second base.
When the easy peel portion is continuously provided on the first base portion, the first side surface sheet or the second side surface sheet is provided on the side of the bottom sheet and on the side of the female member from the occlusion tool. Joined to the other side of the
When the easy peel portion is continuously provided on the second base portion, the first side surface sheet or the second side surface sheet is provided on the side of the bottom sheet and on the side of the male member from the occlusion tool. The packaging bag according to claim 1 or 2, characterized in that it is joined to one side. The packaging bag according to claim 4, wherein the joint portion of the easy peel portion joined to the first side surface sheet or the second side surface sheet has a corrugated shape sharply toward the occlusal tool. The occlusal tool comprises an unjoined portion that is not joined to the first side surface sheet or the second side surface sheet, or the occlusal tool comprises an unjoined portion that is not joined to the first side surface sheet and the second side surface sheet. The packaging bag according to claim 4 or 5, wherein the packaging bag is characterized in that.

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