JP2017218189A - Package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat-cookable package having excellent convenience and improved self-sustaining stability. SOLUTION: A package 1 has a tetrahedral-shaped storage portion 9 in which the contents are stored, and a first seal portion in which inner layers 23 are heat-bonded to each other along two sides of the storage portion 9 twisted by 90 ° and opposed to each other. 6 and the second seal portion 5 and the first seal portion 6 and the second seal portion 5 are connected and extended, and one end portion extends in a direction orthogonal to the first seal portion 6 or the second seal portion 5 to form an inner layer. The first seal portion 6 is provided with a third seal portion 7 in which 23 are heat-bonded to each other, and a ventilation portion 6b for communicating the storage portion 9 and the outside when the internal pressure in the storage portion 9 reaches a predetermined pressure. It was. [Selection diagram] Fig. 1

Description

  The present invention relates to a package that can be cooked by packaging foods and the like.

  A conventional package is disclosed in Patent Document 1. The packaging body of patent document 1 is a self-supporting packaging body formed of a laminated film, and includes a body member and a bottom member. The two front and rear body members are thermally bonded at the side portions and thermally bonded to the peripheral edge of the bottom member whose lower end portion is folded in two.

  The folded bottom member expands back and forth by the weight of the filled contents to form the bottom surface of the package. Moreover, the side part of the trunk | drum member is provided with the steaming part for discharging | emitting vapor | steam, and can heat-cook in the state which made the packaging body self-supported within a microwave oven. When the internal pressure in the storage portion reaches a predetermined pressure due to the steam generated from the contents by heating, the steam is released to the outside through the steaming portion. Thereby, the rupture of the package is prevented.

JP 2006-327590 A

  However, according to the conventional packaging body, the self-supporting stability is low in the front-rear direction, and when the packaging body is installed and rotated on the tray of the microwave oven, or the packaging body is caused by the jet pressure of the steam ejected from the steaming section. There was a problem that the contents fell over and leaked from the steaming section.

  In view of the above problems, an object of the present invention is to provide a heat-cookable package that can improve the self-supporting stability.

  In order to achieve the above object, the present invention provides a package formed of a laminated film having at least an outer layer and an inner layer made of a heat-adhesive resin, and is a tetrahedron-shaped storage unit in which contents are stored. And connecting the first seal part and the second seal part, wherein the inner layers are thermally bonded to each other along two opposite sides twisted by 90 ° of the storage part, and the first seal part and the second seal part. And a third seal portion in which one end portion extends in a direction orthogonal to the first seal portion or the second seal portion and the inner layers are thermally bonded to each other, and the internal pressure in the storage portion is set to a predetermined pressure. The first seal portion is provided with a steaming portion that allows the storage portion and the outside to communicate with each other.

  Further, the present invention is characterized in that the package having the above-described configuration is provided with a pattern capable of discriminating the vertical direction of the storage portion on the non-formed surface of the third seal portion.

  Moreover, the present invention is characterized in that, in the package having the above-described configuration, the steaming portion is located above a central portion in the extending direction of the first seal portion.

  The present invention is also characterized in that, in the package having the above-described configuration, the thermal bonding width of the second seal portion is larger than the thermal bonding width of the first seal portion.

  Further, the present invention provides the package having the above-described configuration, wherein the steaming portion is formed in a curved shape convex in a direction in which the inner edge facing the storage portion of the first seal portion extending in a strip shape is separated from the storage portion. It is characterized in that the distance between the inner edge and the outer edge facing the outside air is partially reduced.

  Further, according to the present invention, in the package having the above-described configuration, the inner edge of the first seal portion that extends in a strip shape of the first sealing portion faces the inner edge and the outside air projecting in the inner direction of the housing portion. It is characterized in that the distance from the outer edge is partially reduced.

  Further, the present invention provides the package having the above-described configuration, wherein the steaming portion has a protruding portion in which an inner edge facing the storage portion of the first seal portion extending in a band shape protrudes in an inner direction of the storage portion, and the protrusion portion. It is characterized by comprising a communication portion that is close to the inner edge and communicates with the outside.

  Further, the present invention provides the package having the above-described configuration, wherein both ends of the third seal portion extend in a direction orthogonal to the first seal portion and the second seal portion, and the laminated film includes the third seal portion. It has an easy tear property in the direction parallel to the extending direction.

  Moreover, the present invention is characterized in that, in the package having the above-described configuration, an opening start means is provided at a central portion in the extending direction of the first seal portion.

  Further, the present invention is characterized in that, in the package having the above-described configuration, at least one layer constituting the laminated film is a uniaxially stretched film stretched in the extending direction of the third seal portion.

  Moreover, the present invention is characterized in that, in the package having the above structure, the inner layer is a uniaxially stretched film stretched in the extending direction of the third seal portion.

  Moreover, the present invention is characterized in that in the package having the above-described structure, a barrier layer having gas barrier properties is provided between the outer layer and the inner layer.

  According to the present invention, the two sides of the tetrahedron-shaped storage portion that are twisted by 90 ° are bonded by the first seal portion and the second seal portion, and when the internal pressure in the storage portion reaches a predetermined pressure to the first seal portion. A steaming part is provided for communicating the storage part with the outside. Since the tetrahedron-shaped storage portion is stable and self-supporting, the packaging body can be prevented from falling down. Moreover, it can prevent that a content leaks through a steaming part during heat cooking by installing and heating a package body in a microwave oven so that a 1st seal | sticker part may be extended up and down. Further, when the storage portion is broken from the first seal portion and the both ends of the broken first seal portion are expanded in the direction away from the both ends, the opening reaches the both side ends of the second seal portion and the package is opened in a boat shape. . Thereby, a package can be used as a container after opening, and the convenience improves.

The perspective view of the package which concerns on 1st Embodiment of this invention. The side view of the package which concerns on 1st Embodiment of this invention. The expanded view of the package which concerns on 1st Embodiment of this invention. Sectional drawing which shows the layer structure of the blank sheet | seat of the package which concerns on 1st Embodiment of this invention. The top view of the elongate laminated film with which the blank sheet of the package which concerns on 1st Embodiment of this invention continued. The perspective view which shows the state after opening the package which concerns on 1st Embodiment of this invention. The side view of the package which concerns on 2nd Embodiment of this invention. The side view which shows the modification of the package which concerns on 2nd Embodiment of this invention. The side view of the package which concerns on 3rd Embodiment of this invention. Sectional drawing which shows the laminated constitution of the laminated | multilayer film which comprises the package which concerns on 4th Embodiment of this invention.

<First Embodiment>
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of the package 1, and FIG. 2 is a side view of the package 1. The package 1 is formed of a blank sheet 102 (see FIG. 2), and has a tetrahedron-shaped storage portion 9 composed of a triangular bottom surface 3 and side surfaces 4a to 4c.

  A content 10 is hermetically stored in the storage portion 9. A bottom seal portion (second seal portion) 5 is formed by heat bonding in a band shape along one side connecting the bottom surface 3 and the side surface 4c. The inner edge 13 of the bottom seal portion 5 faces the storage portion 9. Further, a top seal portion (second seal portion) 6 is formed by heat bonding in a band shape along one side connecting the side surfaces 4a and 4b. The inner edge 14 of the top seal portion 6 faces the storage portion 9. The bottom seal portion 5 and the top seal portion 6 are twisted by 90 ° and face each other.

  Further, a back seal portion (third seal portion) 7 is formed by thermal bonding continuously from the top seal portion 6 to the bottom seal portion 5. One end of the back seal portion 7 extends from above the top seal portion 6 in a direction orthogonal to the top seal portion 6. The other end of the back seal portion 7 extends from above the bottom seal portion 5 in a direction perpendicular to the bottom seal portion 5. Further, the back seal portion 7 extends so as to straddle one side 11 connecting the bottom surface 3 and the side surface 4a.

  The bottom seal part 5, the top seal part 6 and the back seal part 7 are formed by heat-bonding with a predetermined width while facing inner layers 23 (see FIG. 4) of the laminated film 2 described later.

  Further, the top seal part 6 is provided with a steaming part 6b. The steaming part 6 b has a recess 61 in a part of the inner edge 14 of the top seal part 6. The concave portion 61 is formed in a convex curve shape in a direction away from the storage portion 9, and the distance between the inner edge 14 and the outer edge facing the outside air is narrowed in the concave portion 61.

  When the internal pressure in the storage portion 9 rises, the internal pressure is concentrated in the recess 61. For this reason, when the internal pressure in the storage portion 9 reaches a predetermined pressure, the inner layer 23 that is first thermally bonded from the recess 61 is peeled off, and the storage portion 9 communicates with the outside. Thereby, the vapor | steam generate | occur | produced from the content 10 can be discharged | emitted outside through the steaming part 6b, and the content 10 can be heat-cooked, preventing bursting of the accommodating part 9. FIG.

  The thermal bonding width of the bottom seal portion 5 may be formed larger than the thermal bonding width of the top seal portion 6. Thereby, as shown in FIG. 1, when the packaging body 1 is installed so that the bottom seal part 5 contacts the installation surface, the self-supporting stability of the storage unit 9 is further improved. Further, it is possible to prevent the content 10 from leaking out from the bottom seal portion 5 due to the inner layer 23 of the bottom seal portion 5 being peeled off before the steaming portion 6b when the internal pressure is increased.

  In addition, the upright state of the package 1 is a state in which the bottom surface 3 is brought into contact with the installation surface so that the top seal portion 6 extends in the vertical direction as shown in FIG. Opposite to the top seal portion 6, the back seal portion 7 becomes a non-formed side surface 4 c. Further, the side surface 4b and the side surface 4c, which are non-forming surfaces of the back seal portion 7, are provided with a pattern capable of distinguishing the vertical direction of the storage portion 9. Specifically, a character, a figure, a symbol, a pattern, etc. are mentioned as a design.

  The user recognizes the vertical direction of the storage portion 9 with reference to symbols provided on the side surface 4c which is the front surface and the side surface 4b which is the non-formed surface of the back seal portion 7. Therefore, the user can be guided to install the package 1 in an upright state in the microwave oven.

  Thereby, it can prevent that a user installs the package 1 in a microwave oven accidentally so that the side surface 4a which is a non-formation surface of the back seal | sticker part 7 may contact | abut with an installation surface. Therefore, it is possible to prevent the contents 10 from leaking to the outside from the steaming part 6b by heating the packaging body 1 with the steaming part 6b arranged at the bottom of the storage part 9.

  In addition, you may provide the symbol which can discriminate | determine the up-down direction of the accommodating part 9 in three surfaces, the side surface 4a, the side surface 4b, and the side surface 4c. Further, when the back seal portion 7 is formed only on the bottom surface 3, the three portions (4 a, 4 b, 4 c) of the non-formed surface of the back seal portion 7 or the two surfaces including the side surface 4 a that is the front surface of the storage portion 9. It is advisable to provide a symbol that can distinguish the vertical direction.

  An opening notch (V notch) 6 a is provided at the center in the extending direction of the top seal portion 6. Moreover, the steaming part 6b is located above the notch 6a for opening. By arranging the steaming part 6b in the upper part of the storage part 9, even when more contents 10 are stored in the storage part 9, it prevents the contents 10 from leaking through the steaming part 6b during cooking. can do.

  FIG. 3 is a development view of the package 1, and the package 1 is formed from one rectangular blank sheet 102. As will be described later, the blank sheet 102 is thermally bonded to form the side surfaces 4a to 4c and the bottom surface 3 in substantially the same triangular shape. Further, a bottom seal portion 5, a top seal portion 6, and a back seal portion 7 are arranged so as to surround the bottom surface 3 and the side surfaces 4a to 4c. The side surface 4a and the bottom surface 3 are partially divided. The side 11 connecting the bottom surface 3 and the side surface 4a, the side 12 connecting the bottom surface 3 and the side surface 4b, the side 15 connecting the side surfaces 4a and 4c, and the side 16 connecting the side surfaces 4b and 4c are formed in a tetrahedral shape. 9 is a ridge line when 9 is formed.

  Moreover, the blank sheet 102 has linear easy tearability (linear tearability) in the extending direction of the back seal portion 7. This easy tear direction coincides with the MD direction (longitudinal direction: Machine Direction = film flow direction), and the tear propagation resistance value in the MD direction is larger than that in the TD direction (transverse direction = transverse direction = film width direction). Small.

  The easy tear direction (MD direction) extends in a direction orthogonal to the extending direction of the top seal portion 6 on the side surfaces 4a and 4b where the top seal portion 6 is one side in the package 1 of FIG. The bottom seal portion 5 extends in a direction orthogonal to the extending direction of the bottom seal portion 5 on the side surface 4c and the bottom surface 3 forming one side. For this reason, if the side surfaces 4a and 4b are torn straightly from the opening notch 6a of the top seal portion 6 in the easy tear direction, the tear line reaches both ends of the bottom side (inner edge 13) of the side surface 4c.

  FIG. 4 is a cross-sectional view showing a laminated structure of the laminated film 2 constituting the blank sheet 102. The laminated film 2 is a laminated body in which an outer layer 22 and an inner layer 23 made of a thermal adhesive (thermoplastic) resin layer are laminated.

  Since the outer layer 22 is a basic material constituting the package 1, a synthetic resin film having excellent properties in mechanical, physical, chemical and the like can be used. For example, polyester, polyamide, A polypropylene resin or the like can be used. The thickness of the film constituting the outer layer 22 may be determined in consideration of cost and the like, but about 12 to 25 μm is appropriate.

  As a specific example of the outer layer 22, a single body such as a uniaxially stretched nylon film, a biaxially stretched nylon film, a polypropylene film (OPP), a polyester resin film, or a laminate thereof is used. Specific examples of the polyester resin film include polyethylene terephthalate resin (PET), polybutylene terephthalate resin, polyethylene-2, 6-naphthalate resin, polybutylene-2, 6-naphthalate, and polycyclohexanedimethylene terephthalate resin. Various polyester resins can be used.

  The outer layer 22 is formed with a print layer (not shown) for adding a desired print pattern such as a character, a figure, a symbol, or a pattern that is a pattern that can distinguish the vertical direction of the storage unit 9. The printing layer is formed by printing a desired printed pattern on the back surface of the outer layer 22 by a printing method such as gravure printing, offset printing, letterpress printing, screen printing, transfer printing, flexographic printing or the like using the ink composition.

  The ink composition contains one or more ordinary ink vehicles as a main component, and if necessary, a plasticizer, a stabilizer, an antioxidant, a light stabilizer, an ultraviolet absorber, a curing agent, a crosslinking agent, and a lubricant. In addition, one or more additives such as antistatic agents and fillers are optionally added, and further colorants such as dyes and pigments are added, and the mixture is sufficiently kneaded with a solvent, a diluent, and the like. .

  The inner layer 23 is a layer made of a heat-adhesive (thermoplastic) resin, and is melted by heat to fuse the laminated film 2. Examples of the heat-adhesive resin used for the inner layer 23 include low density polyethylene (LDPE), medium density polyethylene, high density polyethylene, linear (linear) low density polyethylene (LLDPE), polypropylene (CPP), and vapor deposition layer. (Silica, alumina, aluminum, etc.) provided polypropylene (VMPP), ethylene-α olefin copolymer, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid copolymer, Ester copolymers of ethylene and acrylic acid esters, ethylene-methacrylic acid copolymers, ethylene-propylene copolymers, methylpentene polymers, polyolefin resins (polyethylene, polypropylene, etc.) with unsaturated carboxylic acids (acrylic acid, methacrylic acid, Anhydrous male It can be to one not selected from modified acid-modified polyolefin resins in fumaric acid, etc.) using two or more kinds.

  The thickness of the inner layer 23 may be appropriately determined in consideration of required physical properties (heat sealability), cost, and the like, and is preferably about 10 μm to 100 μm, particularly preferably about 15 μm to 50 μm. As a method for forming the inner layer 23, a method of laminating a single layer or a multilayer film of the above-mentioned thermoadhesive resin, or a method of laminating the thermoadhesive resin by a melt extrusion method is used.

  Furthermore, by using a stretched uniaxially stretched film for at least one of the outer layer 22 and the inner layer 23, the tear propagation resistance value in the tear direction of the laminated film 2 is reduced, and the tearability of the laminated film 2 is improved. Can do. In particular, the heat-adhesive resin constituting the inner layer 23 tends to be sticky by heating, and the tearability tends to be reduced. For this reason, in particular, in the case where the package 1 is used for cooking while the contents 10 are filled, it is preferable to use a uniaxially stretched film for the inner layer 23 to improve the tearability.

  As a production method of the laminated film 2, a lamination method used when producing a normal packaging material, for example, a dry lamination method, a wet lamination method, a solventless lamination method, a coextrusion lamination method, an inflation method, or the like is used. it can.

  Further, when the above layers are laminated, if necessary, pretreatment such as corona discharge treatment, ozone treatment, flame treatment, blast treatment, etc. can be optionally applied to the surface of the substrate to be laminated.

  FIG. 5 is a plan view of the long laminated film 2 in which the blank sheets 102 are continuous. In the manufacturing method of the package 1, first, a long laminated film 2 having a shape in which a plurality of blank sheets 102 are continuous at the bottom seal portion 5 and the top seal portion 6 is set in a filling machine.

  The laminated film is formed with an easy tear direction (MD direction) parallel to the back seal portion 7. Moreover, the adjacent blank sheet | seat 102 is arrange | positioned so that the bottom face 3 and the side surfaces 4a-4c may become symmetrical in MD direction on both sides of the bottom seal part 5 or the top seal part 6. FIG.

  Next, while sequentially feeding the laminated film 2 from the tip, the back seal portions 7 are continuously heat-bonded by curving in the width direction (vertical direction in FIG. 3) so that the inner layer 23 faces. By dividing the back seal portion 7 by thermal bonding, the divided bottom surface 3 and side surface 4a are joined.

  Next, both ends of the side surface 4c arranged on the straight line extending in the easy tear direction (MD direction) from the notch 6a for opening the bottom seal portion 5 of the laminated film 2 formed into a ring by thermally bonding the back seal portion 7 It is bent at the portion (position of arrow B in FIG. 3), and is superposed and heat-bonded so that the inner layer 23 faces. Next, a predetermined amount of contents 10 (here, solid frozen food) is filled from the remaining unsealed portion (top seal portion 6).

  Thereafter, the top seal portion 6 and the top seal portion 6 of the next packaging body 1 are bent at both end portions (positions of arrows A in FIG. 3) of the side surface 4b, overlapped so that the inner layers 23 face each other, and thermally bonded simultaneously. The tetrahedral storage portion 9 is formed. At this time, the bottom seal portion 5 and the top seal portion 6 are twisted by 90 ° and face each other.

  Finally, the space between the top seal portions 6 is cut with a slitter to form the package 1 as shown in FIG. Therefore, in the next package 1, the contents 10 are filled from the bottom seal portion 5 which is an unsealed portion. Thereafter, the above procedure is repeated to form the package 1 continuously.

  In addition, as a method of heat bonding, it can carry out by well-known methods, such as a bar seal, a rotary roll seal, a belt seal, an impulse seal, a high frequency seal, an ultrasonic seal, for example.

  FIG. 6 is a perspective view showing a state after the package 1 is opened. The package 1 shown in FIG. 1 is torn from the opening notch 6a of the top seal portion 6 as a starting point. Thereby, the side surfaces 4a and 4b continuing to the top seal portion 6 are smoothly torn along the easy tear direction (MD direction) of the laminated film 2.

  Furthermore, when the opening 9a is expanded in a direction in which both ends of the cut top seal portion 6 are separated from each other, break lines due to tearing reach both ends of the bottom seal portion 5, and the breakage of the storage portion 9 is stopped. As a result, a boat-shaped container having a large opening 9a at the top is formed. The bottom portion 9c of the container is formed by the bottom surface 3 and the side surface 4c, and the side wall 9b of the container is formed by the side surfaces 4a and 4b and the bottom surface 3 and part of the side surface 4c. Thereby, after heating the package 1 with a microwave oven and cooking the contents 10, the package 1 after opening can be used as a container (dish), and the convenience of the package 1 is improved.

  According to this embodiment, two sides of the tetrahedron-shaped storage portion 9 that are twisted by 90 ° and are opposed to each other are bonded by the top seal portion (first seal portion) 6 and the bottom seal portion (second seal portion) 5, and the top seal The portion 6 is provided with a steaming portion 6b that allows the storage portion 9 to communicate with the outside when the internal pressure in the storage portion 9 reaches a predetermined pressure. Since the tetrahedron-shaped storage unit 9 is stable and self-supporting, the packaging body 1 can be prevented from falling. Further, the packaging 10 is placed in a microwave oven and heated so that the top seal portion 6 extends in the vertical direction of the storage portion 9, whereby the content 10 leaks through the steaming portion 6 b during cooking. Can be prevented.

  Further, when the storage portion 9 is broken from the center portion of the top seal portion 6 and is expanded in a direction away from both ends of the broken top seal portion 6, the opening 9a reaches the both side ends of the bottom seal portion 5 and the package 1 is Opened into a boat shape. Thereby, the package 1 can be used as a container after opening, and the convenience of the package 1 is improved.

  Further, by providing a pattern that can distinguish the vertical direction of the storage part 9 on the side surfaces 4b and 4c, which are non-forming surfaces of the back seal part (third seal part) 7, the top and bottom of the storage part 9 are marked with the symbol as a mark. Qualify direction. Therefore, the user can be guided to install the package 1 in an upright state in the microwave oven.

  Thereby, it can prevent that a user installs the package 1 in a microwave oven so that the side surface 4a may contact | abut with an installation surface accidentally. Therefore, it is possible to prevent the contents 10 from leaking to the outside from the steaming part 6b by heating the packaging body 1 with the steaming part 6b arranged at the bottom of the storage part 9.

  Further, the steaming part 6 b is located above the central part in the extending direction of the top seal part 6. By arranging the steaming part 6b on the upper part of the storage part 9, it prevents the contents 10 from leaking through the steaming part 6b during cooking while storing more content 10 in the storage part 9. be able to.

  Further, when the packaging body 1 is installed so that the bottom seal portion 5 comes into contact with the installation surface by forming the thermal seal width of the bottom seal portion 5 larger than the thermal bond width of the top seal portion 6, the storage portion 9. The self-supporting stability is improved. Further, it is possible to prevent the content 10 from leaking due to the inner layer 23 of the bottom seal portion 5 being peeled off prior to the steaming portion 6b when the internal pressure increases.

  Moreover, the inner edge 14 facing the storage part 9 of the ceiling seal part 6 extending in a belt-like shape is formed in a convex curved shape in the direction away from the storage part 9, and the steaming part 6b has a part of the distance from the outer edge facing the outside air. It is narrowed and formed. Thereby, when the internal pressure in the accommodating part 9 rises, the internal pressure concentrates on the concave part 61 formed in the convex curved shape of the inner edge 14. Therefore, when the internal pressure in the storage portion 9 reaches a predetermined pressure, the inner layer 23 that is first thermally bonded from the recess 61 is peeled off, and the storage portion 9 communicates with the outside. Thereby, the contents 10 can be cooked while discharging the steam generated from the contents 10 to the outside from the steaming part 6b and preventing the storage part 9 from bursting.

  Further, since the easy tear direction (MD direction) of the laminated film 2 is arranged in a direction parallel to the extending direction of the back seal portion 7 (third seal portion), the lamination is performed with the center portion of the top seal portion 6 as the opening start point. The storage part 9 can be smoothly torn along the easy tear direction (MD direction) of the film 2. Therefore, the package 1 can be easily opened to form a boat-shaped container.

  In addition, by providing the opening notch 6a (opening start means) at the center in the extending direction of the top seal portion (second seal portion) 6, it is easy to open the package 1 and the convenience is further improved. be able to.

Second Embodiment
Next, a second embodiment of the present invention will be described. FIG. 7 is a side view of the package 1 of the second embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. In this embodiment, the shape of the steaming part 6b is different from that of the first embodiment. Other parts are the same as those in the first embodiment.

  The steaming part 6b has a rectangular convex part 62 on a part of the inner edge 14 of the top seal part 6 extending in a strip shape. The convex portion 62 projects toward the inner direction of the storage portion 9 in a direction substantially orthogonal to the extending direction of the top seal portion 6. Moreover, in the convex part 62, the distance of the inner edge 14 and the outer edge which faces outside air is narrowed.

  When the internal pressure in the storage portion 9 rises, the internal pressure concentrates on the convex portion 62. For this reason, when the internal pressure in the storage portion 9 reaches a predetermined pressure, the inner layer 23 first thermally bonded from the convex portion 62 is peeled off, and the storage portion 9 communicates with the outside. Thereby, the contents 10 can be cooked while discharging the steam generated from the contents 10 to the outside from the steaming part 6b and preventing the storage part 9 from bursting.

  FIG. 8 is a side view showing a modified example of the packaging body 1 of the second embodiment. The convex portion 62 protruding in the inner direction of the storage portion 9 has a triangular shape, and the periphery of the convex portion 62 is the top seal portion. 6 is inclined at an obtuse angle with respect to the extending direction. By changing the shape of the convex portion 62, it is possible to change the internal pressure at which the inner layer 23 starts to be peeled off when the internal pressure in the storage portion 9 rises.

<Third Embodiment>
Next, a third embodiment of the present invention will be described. FIG. 9 is a side view of the package 1 of the second embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. In this embodiment, the shape of the steaming part 6b is different from that of the first embodiment. Other parts are the same as those in the first embodiment.

  The steaming part 6 b has a protruding part 63 and a communicating part 64. The protruding portion 63 is formed such that the inner edge 14 facing the storage portion 9 of the top seal portion 6 protrudes toward the inside of the storage portion 9. Further, the communication part 64 is provided in the vicinity of the inner edge of the projecting part 63, the communication part 64 is formed by a through-hole penetrating the blank sheet 102, and the communication part 64 communicates with the outside of the storage part 9. Further, a part of the inner edge of the protruding portion 63 is formed with a recessed portion 64 a that is recessed toward the communicating portion 64.

  When the internal pressure in the storage portion 9 rises, the internal pressure concentrates on the concave portion 64a. For this reason, when the internal pressure in the storage portion 9 reaches a predetermined pressure, the inner layer 23 thermally bonded first from the concave portion 64 a is peeled off and communicates with the communication portion 64. Thus, the contents 10 can be cooked while the steam generated from the contents 10 is discharged from the communication part 64 to the outside to prevent the storage part 9 from bursting.

<Fourth embodiment>
Next, a fourth embodiment of the present invention will be described. FIG. 10 is a cross-sectional view showing the layer structure of the laminated film 2 constituting the package 1 of the fourth embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. In the present embodiment, a barrier layer 24 is provided between the outer layer 22 and the inner layer 23. Other parts are the same as those in the first embodiment.

  For the barrier layer 24, it is preferable to use a material having excellent vapor barrier properties and gas barrier properties when the content 10 to be sealed is easily altered by moisture or oxygen. Specifically, resin films such as ethylene / vinyl alcohol copolymer (EVOH), polyvinylidene chloride (PVDC), polyacrylonitrile (PAN), biaxially stretched polyethylene terephthalate (PET), and biaxially stretched polypropylene (OPP) are used. Can be used. In addition, a vapor-deposited layer (silica, alumina, aluminum, etc.) having a barrier property, a metal foil (aluminum, etc.), a coating layer (polyvinylidene chloride, etc.) on a base material layer made of a resin film such as polyethylene terephthalate and biaxially stretched nylon ) Etc. may be provided.

  Since the film provided with the aluminum foil or the aluminum vapor deposition layer is opaque, it can also serve as a light shielding layer. As the aluminum foil used for the barrier layer 24, an annealed aluminum foil is appropriate, and a thickness of about 6 to 15 μm is appropriate.

  Also, a biaxially stretched nylon film used as the outer layer 22, a vapor-deposited layer of silica, alumina, aluminum or the like, or a coating layer of polyvinylidene chloride, ethylene / vinyl alcohol copolymer (EVOH), etc. on the back surface of the polyester resin film. It may be provided as the barrier layer 24.

  Further, as the outer layer 22, a nylon / EVOH / nylon laminated film, a nylon / metaxylylenediamine / adipic acid copolymer (MXD) / nylon laminated film, or the like may be used to form a barrier property with a multilayer structure. .

  The physical properties required for the package 1, such as mechanical toughness, flex resistance, puncture resistance (pinhole resistance), impact resistance, cold resistance, heat resistance, chemical resistance, etc. Therefore, a material having excellent physical properties may be used for the barrier layer 24.

  Specifically, stretched films of polyolefin such as polyester, polyamide, polyethylene, polypropylene, and ethylene-propylene copolymer can be used.

  Furthermore, by using a film having high heat resistance as the laminated film 2, the contents 10 can be cooked by heating in a state where the package 1 is filled. For example, the contents 10 can be boiled by putting the unopened package 1 in hot water.

  In addition, by using the laminated film 2 that does not include a metal layer as the barrier layer 24 and has a melting point of 100 ° C. or higher, cooking by a microwave oven is also possible. In this case, in order to prevent the package 1 from being ruptured due to an increase in internal pressure during heating, a small hole may be formed in the storage portion 9 by slightly breaking the side surfaces 4a and 4b from the top seal portion 6.

  Alternatively, the barrier layer 24 may be configured by laminating a plurality of the above-mentioned base materials listed as the barrier layer 24. In addition, by using a stretched uniaxially stretched film for at least one of the outer layer 22, the inner layer 23, and the barrier layer 24, the tear propagation resistance value in the tear direction of the laminated film 2 is reduced, and the tearability of the laminated film 2 is reduced. Can be improved.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the meaning of this invention. For example, in the above-described embodiment, the opening notch 6a is formed as a V-notch as opening opening means, but an I-notch or a U-notch may be used instead of the V-notch. Moreover, it can replace with the notch 6a for opening and can provide the scar group area | region which consists of a some fine piercing hole in the top seal | sticker part 6. FIG.

  Further, a printing mark that guides the user to start opening the central portion of the top seal portion 6 without providing the top seal portion 6 with the opening start means may be provided. The user can open the package 1 so as to form a boat-shaped container by forming a notch with a scissor or the like in the center of the top seal portion 6 with the printed mark as a mark to form an opening start point. Moreover, the end surface of the top seal portion 6 may be formed in a saw shape, and a plurality of opening notches (V notches) 6a may be provided in parallel in each extending direction. In this case, the user can open the package 1 at an arbitrary position, and the user can freely select the size of the opening 9a.

  Hereinafter, the effects of the present invention will be described in more detail using examples.

  A 12 μm thick silica-deposited polyethylene terephthalate film (IBPET-RB, manufactured by Dai Nippon Printing Co., Ltd.) was used as the outer layer 22, and a dry laminate layer was laminated on the outer layer 22 (silica deposition layer). A 15 μm thick biaxially stretched nylon film (ONMBCRT, manufactured by Unitika Ltd.) was laminated. Next, after laminating a dry laminate layer on the surface of the barrier layer 24, a laminated film 2 was produced by laminating an unstretched polypropylene film (NewExp-rt, manufactured by Dai Nippon Printing Co., Ltd.) having a thickness of 50 μm as the inner layer 23.

  Using this laminated film 2, a regular tetrahedral package 1 having a side of 15 cm as shown in the first embodiment of FIG. 1 was produced. In addition, the easy tear direction of the laminated film 2 was arranged in parallel with the extending direction of the back seal portion 7. The top seal portion 6, the bottom seal portion 5 and the back seal portion 7 were formed by heat bonding in a strip shape with a seal width of 10 mm, and a steaming portion 6b was provided at the center in the extending direction of the top seal portion 6. The steaming part 6b consists of a concave part 61 which is 10 mm wide and protrudes 4 mm in a direction away from the storage part 9.

  The laminated film 2 according to Example 2 has the same layer structure as that of Example 1, and the laminated film 2 is used to manufacture the package 1 of the second embodiment having the same shape as that of Example 1 except for the steaming part 6b. did. The steaming part 6b is formed by a rectangular convex part 62 (see FIG. 7). The protrusion 62 has a width of 10 mm and protrudes 4 mm toward the inside of the storage portion 9, and the outer edge of the top seal portion 6 facing the protrusion 62 also has a width of 4 mm and protrudes 4 mm toward the inside of the storage portion 9. Has been.

  The laminated film 2 according to Example 3 has the same layer structure as that of Example 1, and the laminated body 2 is used to produce the package 1 of the second embodiment having the same shape as that of Example 1 except for the steaming part 6b. did. The steaming part 6b is formed by a triangular convex part 62 (see FIG. 8). The protrusion 62 has a width of 10 mm and protrudes 4 mm toward the inside of the storage portion 9, and the outer edge of the top seal portion 6 facing the protrusion 62 also has a width of 4 mm and protrudes 4 mm toward the inside of the storage portion 9. Has been.

  The laminated film according to Example 4 has the same layer configuration as that of Example 1. Using this laminated film, the package 1 of the third embodiment having the same shape as that of Example 1 except for the steaming part 6b was produced. The steaming part 6b has the protrusion part 63 and the communication part 64 (refer FIG. 9). The protrusion 63 has a width of 10 mm and protrudes 4 mm in the inner direction of the storage portion 9. The communicating portion 64 is a through hole having a diameter of 2 mm, and a concave portion 64a that is recessed toward the communicating portion 64 is formed with a width of 10 mm on the lower side of the protruding portion 63. Thereby, the recessed part 64a and the communication part 64 are arranged 2 mm close.

[Comparative Example 1]
The laminated film which concerns on the comparative example 1 took the same layer structure as Example 1, and manufactured the package of the same shape as Example 1 using this laminated film. In addition, the packaging body which concerns on the comparative example 1 is not provided with the steaming part 6b.

  The packaging body 1 of Example 1 to Example 4 and the packaging body of Comparative Example 1 were evaluated for suitability for cooking.

  The evaluation of the suitability for cooking by heating was performed by storing 5 pieces of 5 g of hot-sold in the package 1 of Example 1 to Example 4 and the package of Comparative Example 1, and placing the package 1 in an upright state on a tray in a microwave oven. After installing and cooking while rotating the tray at 600 w for 2 minutes, it was visually evaluated whether or not the contents 10 were leaked. The evaluation results are also shown in Table 1. In Table 1, the case where the steam is discharged and the leakage of the content 10 is not confirmed is indicated by ◎, and the case where the leakage of the content is confirmed is indicated by ×.

  As is clear from Table 1, the packaging bodies 1 of Examples 1 to 4 did not fall on the tray during heating. Moreover, as for the package 1 of Example 1- Example 4, a vapor | steam was discharged | emitted outside from the steaming part 6b during a heating, and the leak by the spilling of the content 10 was not confirmed. On the other hand, in the package of Comparative Example 1, a part of the bottom seal portion 5 was ruptured and the steam was discharged to the outside, and a small amount of leakage of contents was confirmed as the steam was discharged.

  INDUSTRIAL APPLICABILITY The present invention can be used for a package capable of cooking food and the like.

DESCRIPTION OF SYMBOLS 1 Package 2 Laminated | multilayer film 3 Bottom 4a-4c Side 5 Bottom seal part (2nd seal part)
6 Top seal (first seal)
7 Back seal (third seal)
DESCRIPTION OF SYMBOLS 9 Storage part 9a Opening opening 9b Side wall 9c Bottom part 10 Contents 22 Outer layer 23 Inner layer 24 Barrier layer 61 Concave part 62 Convex part 63 Protrusion part 64 Communication part

Claims (12)

A package formed by a laminated film having at least an outer layer and an inner layer made of a heat-adhesive resin,
A tetrahedron-shaped storage section for storing contents;
A first seal portion and a second seal portion, wherein the inner layers are thermally bonded along two opposing sides twisted by 90 ° of the storage portion;
A third seal in which the first seal portion and the second seal portion are connected and extend, and one end portion extends in a direction orthogonal to the first seal portion or the second seal portion to thermally bond the inner layers to each other. And
A packaging body characterized in that a steaming part is provided in the first seal part for communicating the storage part with the outside when the internal pressure in the storage part reaches a predetermined pressure.   The packaging body according to claim 1, wherein a pattern capable of distinguishing a vertical direction of the storage portion is provided on a non-formation surface of the third seal portion.   The package according to claim 2, wherein the steaming part is located above a center part in the extending direction of the first seal part.   The package according to any one of claims 1 to 3, wherein a thermal bonding width of the second seal portion is larger than a thermal bonding width of the first seal portion.   The steaming portion has an inner edge facing the storage portion of the first seal portion extending in a strip shape and is formed in a curved shape protruding in a direction away from the storage portion, and the distance between the inner edge and the outer edge facing the outside air is one. The package according to any one of claims 1 to 4, wherein the package is narrowed.   The steaming portion is formed such that an inner edge of the first seal portion extending in a band shape facing the storage portion protrudes in an inner direction of the storage portion, and a distance between the inner edge and an outer edge facing the outside air is partially reduced. The package according to any one of claims 1 to 4, wherein:   The steaming portion includes a protruding portion in which the inner edge of the first seal portion extending in a band shape faces the storage portion and protrudes in the inner direction of the storage portion, and a communication portion that communicates with the inner edge of the protruding portion and communicates with the outside. The package according to any one of claims 1 to 4, characterized by comprising: Both ends of the third seal part extend in a direction perpendicular to the first seal part and the second seal part,
The package according to any one of claims 1 to 7, wherein the laminated film has easy tearability in a direction parallel to an extending direction of the third seal portion.   The package according to claim 8, wherein an opening start means is provided at a central portion in the extending direction of the first seal portion.   The package according to claim 8 or 9, wherein at least one layer constituting the laminated film is a uniaxially stretched film stretched in the extending direction of the third seal portion.   The package according to claim 10, wherein the inner layer is a uniaxially stretched film stretched in the extending direction of the third seal portion.   The package according to any one of claims 1 to 11, wherein a barrier layer having a gas barrier property is provided between the outer layer and the inner layer.

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